WO2000066342A1 - Method for producing resin molded article and apparatus for producing resin molded article - Google Patents

Abstract

A method for producing a resin molded article by extrusion molding wherein various solid additive powders that a resin molded article is to contain are quantitatively and stably added, comprising storing a material R not containing a solid additive powder W in a material storage hopper (2), incorporating the solid additive powder W in a pulsating air wave of positive pressure in a cylinder (41) at an intermediate place of the cylinder (41), deaerating the dispersed powder W, and supplying it.

Description

 Specification

 Method for manufacturing resin molded product and apparatus for manufacturing resin molded product

 The present invention relates to a method for producing a resin molded product and a device for producing a resin molded product, and more particularly to a resin molded product capable of quantitatively and stably adding various solid additive powders contained in the resin molded product. The present invention relates to a method for manufacturing a resin molded article, and an apparatus for manufacturing a resin molded article suitable for realizing such a method. Background art

 In recent years, resin molded products with the same cross section in the form of plates or rods, such as films, sheets, pipes, etc., mainly using thermoplastic resins, have been used for medical equipment, measuring equipment, housing members for computers, etc. It is widely used as case materials for heat insulation equipment such as cabinets and refrigerators, housing materials such as window frames, and core materials such as skis. Many of such resin molded products are manufactured by an extrusion molding method or an injection molding method.

 Next, a conventional extrusion molding method will be described.

 FIG. 10 is an overall configuration diagram schematically showing an example of an extruder used in a conventional extrusion molding method.

 The extruder 101 generally indicates a single-screw extruder, and includes a raw material storage hopper 102 for storing a raw material R of a resin molded product p, a die 103, and an extruder unit 10 And 4.

The raw material storage hopper 102 is located at a position behind the extrusion unit 104, Connected to the terminal 104.

 In FIG. 10, 102 a indicates the outlet of the raw material storage hopper 102, and c 1 indicates the connection between the raw material storage hopper 102 and the extrusion unit 104. Is shown.

 The die 103 is connected to the tip end c2 of the extrusion unit 104. The die 103 is provided with a resin molding port 103a having a shape similar to a resin molded product such as a slit.

 The extruder unit 104 is composed of a cylinder 141, a heater 142 arranged outside the cylinder 141, and a rotatably accommodated cylinder 1141. It includes a screw 144 and screw rotating means 144 such as an electric motor for rotating the screw 144.

 Further, a die 103 is connected to the tip end c2 of the cylinder 141. In this example, a case where a plate-shaped resin molded product P such as a film or a sheet is manufactured by using the extruder 101 is shown. As shown in Fig. 10, roll means 105a, 105b, 105b, and sheet material are wound at a position downstream of the die 1◦3 as shown in Fig. 10. Roll means 105 c is provided.

 In each of the roll means 105a and the roll means 105b, a cooling liquid is circulated and circulated as necessary, and is pushed from the resin molding port 103a of the die 103. The discharged molten material R m is cooled.

 Next, a method for producing a resin molded product p using this extruder 101 will be described.

 First, the raw material R is stored in the raw material storage hopper 102.

More specifically, in the raw material storage hopper 102, raw resin and resin molding Stabilizers, plasticizers, lubricants, hardeners, hardening accelerators, reinforcements, fillers, antistatic agents, flame retardants, UV absorbers, coloring agents, antioxidants, anti-aging Contains additives such as a blocking agent and release agent.

 As the raw material resin, resin pellets, and in some cases, resin pellets to which a release agent is added in advance are used.

 When the cooling liquid can be circulated and circulated in each of the roll means 105a and 105b, the cooling means is provided in each of the roll means 105a and 105b. Circulate the coolant.

 Next, the heater is heated to a predetermined temperature. Further, the screw 144 is rotated at a predetermined rotation speed by rotating the screw rotating means 144.

 The raw material R supplied into the cylinder 14 1 from the raw material storage hopper 10 2 with the rotation of the screw 14 3 is melted in the cylinder 14 1 by the heat of the heater 14 2 To be. The molten raw material R m formed in the cylinder 141 in this way is further connected to the tip c 2 of the cylinder 141 by the extrusion pressure generated by rotating the screw 144. Continuously extruded from the die 103.

 In this way, the molten raw material R m continuously extruded from the die 103 is then subjected to air while passing through the roll means 105 a, 105 b, 105. When the cooling liquid is circulated and circulated in the roll means 105a and 105b, it is cooled by the cooling liquid to form a predetermined thick resin molded article. In this way, the resin molded product p having a predetermined film thickness is sequentially wound on the sheet material winding roll means 105c.

In order to achieve this objective, the roll means 105 a and the roll means 105 b must be The rotation speed of each of the spacing, the plurality of roll means 105a, 105b, 105 '.' And the sheet material winding roll means 105c is appropriately adjusted.

 In FIG. 10, a single-screw extruder 101 having one screw 143 has been described as an example, but the extruder 101 may be a twin-screw extruder having two screws, or a screw having two or more screws. Have already been proposed.

 Also, in FIG. 10, the case where a resin molded product p of a plate-like body such as a film or a sheet is manufactured has been described. Molded articles can be manufactured.

 Next, a conventional injection molding method will be described.

 FIG. 11 is an overall configuration diagram schematically showing a conventional injection molding machine used in a conventional injection molding method.

 The injection molding machine 201 includes a raw material storage hopper 202 for storing a raw material R of a resin molded product p, a mold 207, and an injection unit 204.

 The raw material storage hopper 202 is connected to the injection unit 204 at a position behind the injection unit 204.

 In FIG. 11, reference numeral 202a denotes an outlet of the raw material storage hopper 202, and cl denotes a connection portion between the raw material storage hopper 202 and the injection unit 204.

 The mold 207 includes a fixed mold 207a and a movable mold 207b.

 The fixed mold 207a is configured so that the tip c2 of the injection unit 204 is in contact with the fixed mold 207a.

The member device indicated by 207 e indicates an ejector, and the ejector 207 e is provided so as to be able to protrude and retract from the surface of the movable mold 2◦7b. The injection unit 204 can move forward and backward with respect to the mold 207 as a whole. It is movable so that it works.

 The injection unit 204 is composed of a cylinder 241, a heater 242 provided outside the cylinder 241, a rotatable cylinder 241 and a cylinder 241. A screw for rotating the screw 243 housed so as to be able to move forward and backward, and a screw for moving the screw 2443 forward and backward in the direction of the tip of the extruder unit 204. A rotating and pushing means 2 4 4 is provided.

 The screw rotating / extruding means 244 is made rotatable by screw rotating means (not shown) such as an electric motor. In addition, the screw rotating and pushing means 244 can push the screw 243 forward or move the screw 243 to the rear part of the cylinder 241 by hydraulic means (not shown). It has become.

 When the screw rotating / extruding means 24 4 is rotationally driven, the screw 24 3 rotates, and the raw material R supplied into the cylinder 24 1 is fed to the front of the cylinder 24 1. At this time, the raw material R moving forward in the cylinder 241 receives heat from the heat source 242 and is turned into a molten raw material Rm.

 The screw 243 itself moves (retreats) to the rear side of the cylinder 241 by feeding the raw material R and / or the molten raw material Rm forward.

 Next, a manufacturing method for manufacturing a resin molded product p having a desired shape using the injection molding machine 201 will be described.

 When manufacturing the molded product P, first, as a fixed mold 200 a and a movable mold 200 b, these are manufactured in a mold 207 with the molds clamped. Prepare a resin molded product that can be formed in a shape opposite to the shape of the molded product.

Also, the raw material R of the resin molded product p is accommodated in the raw material storage hopper 202. More specifically, in the raw material storage hopper 202, a stabilizer, a plasticizer, a lubricant, a hardener, a hardening accelerator, a reinforcing material, a filler, Contains additives such as antistatic agents, flame retardants, ultraviolet absorbers, coloring agents, antioxidants, anti-aging agents, and release agents.

 As the raw material resin, resin pellets, and in some cases, resin pellets to which a release agent is added in advance are used.

 Next, the fixed mold 207a and the movable mold 207b are clamped (mold clamping step). Heat the heater to a specified temperature. The screw 243 is rotated at a predetermined rotation speed by rotating the screw rotation / extruding means 244.

 When the screw rotation / extruding means 24 4 is driven to rotate at a predetermined rotation speed, the screw 24 3 rotates at a predetermined rotation speed, and by the rotation of the screw 24 3, the screw 24 3 enters the raw material storage hopper 202. The stored raw material R is supplied into the cylinder 241 from the outlet 202 a of the raw material storage hopper 202.

 The raw material R supplied into the cylinder 241 moves in the cylinder 241 in the direction of the fixed mold 207a as the screw 243 rotates.

 The raw material R is brought into a molten state by the heat of the heater 242 while moving in the direction of the fixed mold 207 a in the cylinder 241, and the molten raw material R R m is stored at the tip of the cylinder 2 4 1.

 In this step, the screw 243 itself moves (retreats) to the rear side of the cylinder 241.

 Next, the injection unit 204 is advanced in the direction of the mold 207 to make contact with the resin injection port (nozzle latch) of the mold 207 (nozzle tapping).

Then, using the hydraulic means (not shown) of the screw rotation and extrusion means 244, The screw 2 43 is extruded in the direction of the fixed mold 207 a. As a result, the molten raw material Rm stored at the tip of the cylinder 241 is injected into the closed mold 207 (injection step).

 Even after the molten raw material Rm is injected into the mold 207, the injection pressure is maintained until the molten raw material Rm injected into the mold 207 has a certain hardness. Pressure).

 The molten raw material Rm injected into the mold 207 is indirectly cooled and solidified by the cooling water passing through the mold 207. During the cooling process, all of the injection units 204 are stopped except for the rotation of the screw 243 (cooling process). In parallel with this cooling step, melting and metering of the raw material R are performed simultaneously.

 That is, the raw material R used in the next injection step is supplied from the raw material storage hopper 202 into the cylinder 241 by the rotation of the screw 243.

 The raw material R supplied into the cylinder 241 moves in the cylinder 241 in the direction of the fixed mold 207a with the rotation of the screw 243.

 The raw material R is brought into a molten state by the heat of the heater 242 while moving in the direction of the fixed mold 207a in the cylinder 241. It is stored at the tip of Linda 2 4 1.

 At this time, the screw 243 itself starts to retreat with the transfer force (extrusion force) generated in the molten raw material R due to the rotation of the screw 243.

 Therefore, if the retreat distance of the screw 243 is limited, the amount of the molten raw material Rm stored in the cylinder 243 and at the tip of the cylinder 243 is adjusted to an amount corresponding to the capacity to be injected next. (The process of melting and measuring the raw materials).

Next, after the molten material R m injected into the mold 207 is sufficiently cooled and reaches a desired temperature in the mold 207, the movable mold 207b is moved to mold the mold. Open Type 2 07 (Type Opening process), the resin molded product p molded in the mold 207 is ejected to the ejector 107c, and in some cases, an automatic unloading robot means (shown in the drawing) having a gripper for gripping the resin molded product. ) Is taken out to the target place using a resin molded product protruding process.

 Although FIG. 11 illustrates an example of an injection molding machine 201 using a screw 243, an injection molding machine using a plunger has already been proposed as an injection molding machine.

 By the way, in the conventional extrusion molding method, various solid additives for modifying the resin are accommodated in the raw material storage hopper 102 together with the raw material resin.

 However, when the solid additive is stored in the raw material storage hopper 102, the size of the raw material resin (usually a resin pellet) is different from the particle size of the powder of the additive. Due to such factors, uneven mixing may occur in the resin molded product due to non-uniform mixing.

 When the additive is stored in the raw material storage hopper 102, the amount of the raw material resin stored in the raw material storage hopper 102 beforehand in the raw material storage hopper 102 Once the predetermined amount of additive is stored in the raw material storage hopper 102, the ratio of the additive to the raw material There is a problem that it cannot be changed.

 For this reason, in the extrusion molding method, for example, the additive can be stably and quantitatively added to the raw material R due to the development of a resin molded product using a new material, and the raw material There has been a long-felt need for the development of a method for producing a resin molded article that can easily change the mixing ratio of an additive to a resin, and a production apparatus for a resin molded article that can perform such a method.

In addition, for example, a plate-shaped resin molded product ρ as described with reference to FIG. 10 is manufactured. In order to prevent the molten raw material Rm from sticking to the roll means 105a and 105b, in addition to the resin raw material, It has been practiced to add a powder of a mold agent (not shown) or to previously contain a resin pellet in which a mold release agent is dispersed.

 However, as described above, when the mixture of the resin raw material and the release agent powder (not shown) or the resin pellet in which the release agent is dispersed in advance is stored in the raw material storage hopper 102. In the cylinder 141, a mixture of the resin raw material and the powder of the release agent (not shown) is heated by the heat of the mold. The release agent is dispersed in advance. When the melted resin pellets are melted, a molten release agent appears on the surface of the molten raw material Rm, and the molten release agent (shown in the figure) is placed between the screw 144 and the molten material Rm. No matter how many times the screw 144 is rotated, the screw 144 rotates only due to the interposition of the molten raw material Rm. May not be able to be extruded.

 When such a phenomenon occurs, only a smaller amount of molten l! Lfi material Rm is extruded from the resin molding port 103a of the die 103, and in this case, the produced resin molded product is Since it becomes a non-standard defective product, it becomes impossible to manufacture the resin molded product p continuously. For this reason, the conventional extrusion molding method has a problem that the production efficiency of the resin molded product p may be significantly reduced.

In addition, when the release agent powder (not shown) is excessively put in the raw material storage hopper 102, it is melted into the roll means 105a and / or the roll 105b. When the raw material Rm comes into contact, the release agent causes a dripping phenomenon on the surface of the roll means 105a and / or the surface of the roll 105b, and due to this dripping phenomenon, There is also a problem that a pattern like oil dripping is formed on the surface of the resin molded product (eg, a film sheet) to be manufactured. In such a case, even if the worker notices during the extrusion molding operation that a pattern like oil dripping is formed on the surface of the resin molded product P to be manufactured, the raw material storage is performed. When a mixture of the raw material R and the powder of the release agent (not shown) is stored in the hopper 102, the release agent is already contained in the raw material storage hopper 102. Since the powder (not shown) has already been mixed in the raw material Rm, it is necessary to remove excess release agent powder (not shown) from the raw material storage hopper 102 afterwards. Can't.

 For this reason, conventionally, when an operator notices that a pattern like oil dripping is formed on the surface of a resin molded product to be manufactured during the extrusion molding operation, at that time, the resin The production of the molded article p was stopped, the mixture of the raw resin and the release agent powder (not shown) stored in the raw material storage hopper 102 was discarded, and the mixing ratio was changed anew. In addition, a measure has been taken in which the raw material resin and the powder of the release agent (not shown) are accommodated in a raw material storage hopper 102 to review the production of a resin molded product.

 However, in such a method, the raw material resin and the powder of the release agent (not shown) already contained in the raw material storage hopper 102 must be discarded, and a large amount of raw material R is required. Is wasted.

In addition, even when the raw material storage hopper 102 previously contains a resin pellet in which a release agent is dispersed, the operator may not be able to produce the resin molded product (eg, If you notice that a dripping pattern has formed on the surface of p, the production of resin molded products is stopped at that point and the raw material storage hopper 102 The stored resin pellets are discarded, and a new resin pellet with a different mixing ratio of the release agent is stored in the raw material storage hopper 102, so the raw material storage hopper 102 The resin pellets already contained in the inside must be discarded, and a large amount of resin pellets are wasted. Yes <Disclosure of the Invention

 The first object of the present invention has been made to solve the above problems, and relates to an extrusion molding method and an extruder, which can stably add a desired amount of a solid additive. A certain amount of molten material can be constantly and stably extruded from the resin molding opening of the die without causing the screw of the extruder to run idle, and oil drips on the surface of the resin molded product to be manufactured. If you notice that such a pattern is being formed, it is not necessary to dispose of a large amount of resin molded products by easily changing the mixing ratio of the release agent while manufacturing the resin molded products It is an object of the present invention to provide a method for producing a resin molded product, and a device for producing a resin molded product suitable for implementing such a method for producing a resin molded product.

 In addition, in the conventional injection molding method, similarly to the above-described conventional extrusion molding method, various solid additive additives for modifying the resin of the resin molded product p molded in the mold 207 are supplied to the raw material storage hopper. It is housed in 202.

 However, when the solid additive is accommodated in the raw material storage hopper 202, the size of the raw material resin (usually resin pellet) is different from the particle size of the additive powder. As a result, non-uniform mixing may cause material irregularities in the resin molded product.

When the additive is stored in the raw material storage hopper 202, the amount of the raw material resin stored in the raw material storage hopper 202 beforehand in the raw material storage hopper 202 The raw material storage hopper—Once a predetermined amount of additive has been stored in 202, the ratio of additive to raw material resin must be changed afterwards. Is not possible. For this reason, for example, due to the development of resin molded products using new materials, in the injection molding method, additives can be stably and quantitatively added to the raw material R and the raw material resin For many years, there has been a long-felt need to develop a method for manufacturing a resin molded product, which can easily change the ratio of the additive to the resin, and a device for manufacturing a resin molded product capable of performing such a method.

 Further, for example, in the case of manufacturing the resin molded product P in the mold 207 as described with reference to FIG. 11, the fixed mold 207a and the movable mold 207b are used. In order to prevent the molten raw material Rm from sticking, powder of a release agent (not shown) may be added to the raw material storage hopper 202 in addition to the resin raw material, or the release may be performed in advance.型 Contains a sealing bellet in which the molding compound is dispersed.

 However, as described above, when a mixture of a resin raw material and a release agent powder (not shown) or a resin pellet in which a release agent is dispersed in advance is contained in the raw material storage hopper 202. In the cylinder 241, the mixture of the resin raw material and the powder of the release agent (not shown) is heated by the heat of the heater 2422, or the release agent is dispersed in advance. When the melted resin pellets are melted, a molten release agent appears on the surface of the molten raw material Rm, and a molten release agent (not shown) is provided between the screw 243 and the molten raw material Rm. ) Causes the screw 243 to run idle and the screw 243 to rotate, but the molten raw material Rm remains in the cylinder forming the injection unit of the injection molding machine 201. 4 In some cases, a phenomenon may occur in which a predetermined amount of solvent cannot be stored at the tip That.

When such a phenomenon occurs, the screw 243 is extruded using the screw rotating / extruding means 208, and the material Rm is injected into the mold 207. Since the amount of the solvent Rm in the mold 207 is insufficient, the resin molded product to be produced becomes a defective product having chips or voids. There is a problem that the production efficiency of the molded product p is significantly deteriorated.

 In addition, when the release agent powder (not shown) is excessively charged in the raw material storage hopper 202, the mold surface of the fixed mold 207a and the movable mold 200 The mold release agent interposed between each of the mold surfaces 7b and the source material Rm causes a dripping phenomenon, and the dripping phenomenon causes the surface of the resin molded product p to be produced. There is a problem that a pattern like oil dripping is formed.

 In such a case, even if the worker notices during the injection molding operation that a pattern like oil dripping is formed on the surface of the resin molded product p to be manufactured, the above is described. As in the case of the conventional extrusion molding method, when a mixture of the raw material R and the powder of the mold release (not shown) is contained in the raw material storage hopper 202, the raw material storage hopper -2 Since the powder of the release agent (not shown) has already been mixed into the raw material Rm within the raw material storage hopper 202, the excess release agent from the raw material storage hopper 202 is ex-post. Powder (not shown) cannot be removed.

 For this reason, conventionally, when an operator notices that a pattern of oil dripping is formed on the surface of a resin molded product to be manufactured during an injection molding operation, at that time, the resin Production of the molded article p was discontinued, the mixture of the resin raw material and the release agent powder (not shown) contained in the raw material storage hopper 202 was discarded, and the mixing ratio was changed anew. In addition, measures have been taken to accommodate the resin raw material and the powder of the release agent (not shown) in the raw material storage hopper 202 and restart the production of the resin molded product. In this case, the raw material R already stored in the raw material storage hopper 202 must be discarded, and there is a problem that a large amount of the raw material R is wasted.

Similarly, even in the case where the raw material storage hopper 202 previously contains a resin pellet in which a release agent is dispersed, the worker can control the resin produced during the injection molding operation. When you notice that a pattern like oil dripping is formed on the surface of the molded product P In this regard, the production of resin molded products was discontinued, the resin pellets contained in the raw material storage hopper 202 were discarded, and the resin pellets with a different mixing ratio of the release agent were stored. A measure has been taken to accommodate the resin pellets already contained in the raw material storage hopper 202. There is a problem that a large amount of resin pellets are wasted because they must be discarded.

 A second object of the present invention is to solve the above-mentioned problems, and relates to an injection molding method and an injection molding machine, and stably supplies a desired amount of a solid additive to a resin raw material. It can be added, and a fixed amount of the melt can be constantly stored at the tip of the cylinder that composes the injection unit without rotating the screw that composes the injection unit of the injection unit. As a result, chipping and voids do not occur in the resin molded product manufactured in the mold, and a pattern in which oil drips on the surface of the manufactured resin molded product is being formed. If you notice, while manufacturing the resin molded product, by changing the mixing ratio of the release agent easily, there is no need to dispose of a large amount of the resin molded product, the manufacturing method of the resin molded product, and , Such resin molding An object of the present invention is to provide an apparatus for manufacturing a resin molded article suitable for performing a method for manufacturing an article.

In the method for producing a resin molded product according to claim 1, the raw material stored in the raw material storage hopper is rotated by rotating a screw provided in a cylinder of the extruder, in an extrusion molding method. The molten material formed in the cylinder is continuously extruded from the die connected to the tip of the cylinder with the extrusion pressure generated by feeding into the cylinder, melting in the cylinder, and rotating the screw. A method for producing a resin molded product, wherein the raw material excluding the solid additive powder is stored in a raw material storage hopper, and the raw material is stored in a position in the middle of the cylinder. Then, the powder of the solid additive mixed with the positive pressure pulsating air wave and sent in a dispersed state in the cylinder was degassed and then supplied.

 Here, the term "pulsating air wave" used in the present specification means a pulsating air wave in which a high pressure (peak) and a low pressure (valley) alternately appear in the air pressure.

 “Positive pressure” means that the pressure in the manufacturing apparatus used in the method for manufacturing a resin molded product is higher than the atmospheric pressure (outside air pressure) outside the manufacturing apparatus.

 In addition, “pulsating air wave of positive pressure” means that both the peak and the valley of the pulsating air wave are higher than the atmospheric pressure (outside air pressure) and the peak of the pulsating air wave is higher than the atmospheric pressure (outside air pressure). The valley of the pulsating air wave is equal to the atmospheric pressure (outside pressure), and includes both pulsating air waves.

 “Solid additive” refers to solid additives (powder and granules) among various additives used to modify the resin and to prevent the resin from adhering to the surface of roll means. Means a material used in the form of

 Since such solid additives vary depending on the type of resin and the use of the resin molded product, it is difficult to unconditionally define such solid additives. Examples include an inhibitor, an ultraviolet absorber, a stabilizer, a filling and reinforcing agent, a foaming agent, a flame retardant, an antistatic agent, a cross-linking agent, a stabilizer, and a coloring agent.

Examples of the antioxidant include hindered phenol-based antioxidants (tetrax- {methylene-13- (3 ', 5, di-tert-butyl-14,1-hydroxyphenyl) propionate} methane), phenol, etc. Antioxidants (such as 2,6-di-tert-butylphenol), amine antioxidants (such as naphthylamines (such as phenylnaphthylnaphthylamine), and diphenylamines (such as N, N, diphenyl-p) — Paraphenylenediamines such as phenylenediamine and the like; and phosphite ester antioxidants (triphenylphosphite and the like). Examples of the ultraviolet absorber include salicylic acid derivatives such as benzotriazoles and salicylic esters, and benzophenone-based substances.

 Examples of stabilizers include hindered amine light stabilizers, o-oxyben V phenone derivatives, 0, o, dioxybenzophenone derivatives, salicylic acid esters (phenyl, tert-butylphenyl, etc.), benzotria Examples of the substance include a sol derivative and a resorcinol derivative.

 Examples of the filler include reinforcing black, silica, alumina, myric, graphite, carbon fiber, glass fiber, glass powder (glass ball), and the like.

 Examples of the foaming agent include various organic foaming agents such as azo compounds (eg, azodicarbonamide, azobisformamide, etc.), inorganic foaming agents such as sodium bicarbonate, P, P And decomposable foaming agents such as high-temperature foaming agents such as oxybisbenzenesulfonyl semicarbazide.

 As a flame retardant, for example, a halogen-containing compound that suppresses and reduces the flammability of resin materials and products by having a halogen that suppresses combustion in the molecule, and a phosphorus element that suppresses combustion in the molecule. And phosphate-based compounds that reduce and suppress the flammability of resin materials and resin products.

 Examples of the antistatic agent include a cationic activator, an anionic activator and a nonionic activator.

 There are various types of cross-linking agents, and examples thereof include organic peroxide-based compounds.

 Various pigments and dyes are used as the colorant.

When the resin is vinyl chloride, for example, a vinyl chloride stabilizer such as metal stone / organotin compound is used as an additive. In addition, examples of the additive used for preventing the resin from adhering to the surface of the roll means and the like include a release agent.

 There are various types of such release agents. For example, hydrocarbon release agents (for example, paraffin wax, microcrystalline phosphorus wax, polyethylene wax, montan wax, etc.), and fatty acid release agents (Eg, stearic acid, hydroxystearic acid, etc.) and fatty acid amide type release agents (eg, polyethylene bis stearamide, ethylene bis lauryl amide, methylene bis stearamide, stearamide, oxcystamide, etc.) , Fatty acid ester release agents (for example, stearic acid monoglyceride, polyhydric alcohol fatty acid esters, etc.), aliphatic alcohol release agents (for example, stearyl alcohol, coconut alcohol, etc.), and other release agents Molding agent (for example, fluororesin powder, silicon resin powder, etc.) It can be mentioned.

 In this method of manufacturing a resin molded product, the resin raw material except for the solid additive powder is stored, mixed with a positive pressure pulsating air wave from the middle of the cylinder of the extruder, and dispersed in the vicinity of the first cylinder. The solid additive powder that has been pneumatically transported to the location is supplied into the cylinder.

In other words, in this method for producing a resin molded product, the solid additive powder is mixed with the positive pressure pulsating air wave and dispersed, and is pneumatically transported to a predetermined position of the cylinder. There is no accumulation of powder on the inner wall surface of the transport pipe or the phenomenon of powder blow-through in the transport pipe, which occurs when air with a constant pressure flows through the transport pipe. Therefore, the solid additive powder mixed and dispersed in the positive pressure pulsating air wave has the same concentration as that at the time when the solid additive powder is mixed and dispersed in the positive pressure pulsating air wave, As a result of being pneumatically transported to a position near the cylinder, a solid additive powder having a desired concentration can be stably supplied continuously into the cylinder. In this method for producing a resin molded product, a pneumatic transportation method using a positive pressure pulsating air wave is employed as a method for transporting the solid additive powder to a predetermined position in the cylinder.

 If the pneumatic transportation method is used to transport the solid additive powder, the amount of solid additive powder that is mixed and dispersed in the air used for pneumatic transportation can be reduced by reducing the amount of solid additive powder per hour. The amount of the powder of the solid additive to be supplied to the container can be extremely small. Thereby, the amount of the powder of the solid additive to be added to the resin raw material can be extremely small.

 In this method for producing a resin molded product, a positive pressure pulsating air wave is used as a medium for pneumatically transporting the powder of the solid additive, instead of air of a steady pressure flow.

 As a result, the amplitude, waveform, frequency, and wavelength of the positive pressure pulsating air wave that pneumatically transports the solid additive powder are adjusted to a value in which the solid additive powder is easily mixed and easily dispersed. It is also possible to mix and disperse the solid additive powder at a high concentration with respect to the air volume. This allows a large amount of solid additive powder to be added to the resin raw material.

 If the manufacturing method of this resin molded article is used, the material properties of the resin molded article can be adjusted according to the purpose by changing the amount of the solid additive powder added to the resin constituting the resin molded article in various ways. Can be changed in various ways.

An apparatus for producing a resin molded product according to claim 2 relates to an extruder, wherein a die is connected to a leading end and a cylinder of the extruder is connected to a raw material storage hopper at a rear end. At a predetermined position between the tip and the connection of the raw material storage hopper, attach the discharge port of the deaeration hopper, connect one end of the transport pipe to the deaeration hopper, and connect the other end of the transport pipe to the The high pressure pulsating air wave generating means was connected, the outlet of the solid additive storage tank was connected at a position in the middle of the transport pipe, and an elastic membrane having holes was provided at the outlet of the solid additive storage tank. This apparatus for producing a resin molded product includes both an extruder using one screw and an extruder using two or more screws. In the apparatus for manufacturing a resin molded product, a high-pressure pulsating air wave generating means connected to the other end of the transport pipe is driven to supply a positive-pressure pulsating air wave into the transport pipe. When a positive pressure pulsating air wave is supplied into the transport pipe, the elastic membrane provided at the outlet of the solid additive storage tank connected at a position in the middle of the transport pipe causes the amplitude of the positive pressure pulsating air wave, Vibrates according to waveform, wavelength, frequency, etc.

 Therefore, if a constant positive pressure pulsating air wave is supplied into the transport pipe, the elastic film vibrates in a constant manner according to the amplitude, waveform, wavelength, frequency, and the like of the positive pressure pulsating air wave. As a result, according to the amplitude, waveform, wavelength, frequency, etc. of the pulsating air wave of the positive pressure, a certain amount of the solid additive powder stored in the solid additive storage tank is determined by the pores of the elastic membrane. Is discharged into the transport pipe.

 The powder of the solid additive discharged into the transport pipe is immediately mixed with the positive pressure pulsating air wave supplied into the transport pipe and dispersed. Then, it is mixed with the pulsating air wave of positive pressure and dispersed, and pneumatically transported to the deaeration hopper connected to one end of the transport pipe.

 Thus, in this apparatus, a positive pressure pulsating air wave is used as a medium for transporting the powder of the solid additive through the transport pipe to one end of the transport pipe, instead of using the air at a constant pressure. As a result, in this apparatus, the adhesion and deposition of powder on the inner wall surface of the transport pipe and the phenomenon of powder blow-through in the transport pipe do not generally occur when steady pressure air is supplied into the transport pipe.

Therefore, the powder of the solid additive discharged into the transport pipe from the hole of the elastic membrane is pneumatically transported to the degassing hopper at the concentration at the time when the powder is discharged into the transport pipe. Positive pressure pulsating air waves are mixed into the deaeration hopper and pneumatically transported in a dispersed state. After degassing, the powder of the solid additive is supplied into the cylinder from a discharge port of the degassing hopper from a position in the middle of the cylinder of the extruder.

 In this resin molded product manufacturing apparatus, a positive pressure pulsating air wave is used as a medium for pneumatically transporting the solid additive powder to a predetermined position in the cylinder.

 If air is used as a medium for transporting the solid additive powder, the amount of the solid additive powder that is mixed and dispersed in the air used for pneumatic transportation is reduced, so that it is supplied into the cylinder per hour. The amount of the solid additive powder to be used can be extremely small. Thereby, the powder of the solid additive to be added to the resin raw material can be made extremely small.

 Also, in this resin molded product manufacturing apparatus, a positive pressure pulsating air wave is used as a medium for pneumatically transporting the solid additive powder, instead of a steady pressure air flow.

 When a positive pressure pulsating air wave is used, the amplitude, waveform, frequency, and wavelength of the positive pressure pulsating air wave are reduced by adjusting the solid additive powder to be easily mixed and dispersed. It is also possible to mix and disperse a solid additive powder in a high concentration relative to the amount of air. This allows a large amount of solid additive powder to be added to the resin raw material. Therefore, if this device is used, a desired amount of solid additive powder can be stably and quantitatively supplied into the cylinder from a position in the middle of the cylinder of the extruder.

 The apparatus for producing a resin article can be used for various methods for producing a resin molded article.

Examples of the use of such a resin molded product manufacturing apparatus include, for example, a method in which, among various solid additives, an additive component that needs to be precisely fed to a resin raw material in a minute amount is stored in a solid additive storage tank. Alternatively, the raw material storage hopper may contain a raw material resin and a solid additive other than the solid additive powder stored in the solid additive storage tank. In addition, only the raw material resin is stored in the raw material storage hopper and stored in the solid additive storage tank. You may make it contain the powder of a solid additive.

 In addition, the raw material excluding the release agent powder may be stored in the raw material storage hopper, and the release agent powder may be stored in the solid additive storage tank.

 The method for producing a resin molded product according to claim 3 relates to an injection molding method, wherein a raw material is stored by rotating a screw or a plunger provided in a cylinder of the injection molding. The raw material stored in the hopper is supplied into the cylinder, melted in the cylinder, and a predetermined amount of the molten material formed in the cylinder is stored at the tip of the cylinder and stored at the tip of the cylinder. The screw or plunger is advanced toward the tip of the cylinder by the specified amount of the molten material, and the predetermined amount of the molten material stored at the tip of the cylinder is connected to the tip of the cylinder. A method for producing a resin molded product by injecting the raw material into a mold, and manufacturing a resin molded product in the mold. Distillate City, from the middle position of the cylinder, into the cylinder, the powder of the solid additives were mixed in positive pulsating air waves dispersed from the degassed and then supplied. In this method of manufacturing a resin molded product, the resin raw material except for the powder of the solid additive is stored, mixed with a positive pressure pulsating air wave from one half of a cylinder of an injection unit of an injection molding machine, and dispersed. The powder of the solid additive, which has been pneumatically transported to a position near the cylinder, is supplied into the cylinder.

In other words, in this method for producing a resin molded product, the solid additive powder is mixed with the positive pressure pulsating air wave and dispersed, and is pneumatically transported to a predetermined position of the cylinder. There is no accumulation of powder on the inner wall surface of the transport pipe or the phenomenon of powder blow-through in the transport pipe, which occurs when air with a constant pressure flows through the transport pipe. Therefore, the solid additive powder mixed and dispersed in the positive pressure pulsating air wave has a concentration and a concentration at the time when the solid additive powder is mixed and dispersed in the positive pressure pulsating air wave. As a result of being pneumatically transported to the position near the cylinder at the same concentration, the solid additive powder of the desired concentration can be stably supplied continuously into the cylinder.

 Further, in this method for producing a resin molded product, a pneumatic transportation method is employed as a method for transporting the solid additive powder to a predetermined position in the cylinder.

 If the pneumatic transportation method is used to transport the solid additive powder, the amount of solid additive powder that is mixed and dispersed in the air used for pneumatic transportation can be reduced by reducing the amount of solid additive powder into the cylinder. The amount of solid additive powder supplied per unit can be extremely small. Thereby, the amount of the powder of the solid additive to be added to the resin raw material can be extremely small.

 In this method for producing a resin molded product, a positive pressure pulsating air wave is used as a medium for pneumatically transporting the solid additive powder, instead of the air having a constant pressure flow.

 As a result, the amplitude, waveform, frequency and wavelength of the positive pressure pulsating air wave that pneumatically transports the solid additive powder are adjusted so that the solid additive powder is easily mixed and dispersed, thereby reducing the amount of air. It is also possible to mix and disperse the solid additive powder in a high concentration relative to the amount. This allows a large amount of solid additive powder to be added to the resin raw material.

 That is, if the manufacturing method of this resin molded product is used, the material properties of the resin molded product can be varied according to the purpose by changing the amount of the solid additive powder added to the resin constituting the resin molded product in various ways. Can be changed.

An apparatus for manufacturing a resin molded product according to claim 4 relates to an injection molding machine, wherein a die is connectable to a tip portion, and a raw material storage hopper is connected to a rear portion. Attach the discharge port of the deaeration hopper to the cylinder of the machine at a predetermined position between the tip of the cylinder and the connection of the raw material storage hopper, connect one end of the transport pipe to the deaeration hopper, and Connect the high pressure pulsating air wave generating means to the other end of the solid additive storage tank, and connect the outlet of the solid additive storage tank at a position in the middle of the transport pipe. Was provided.

 The apparatus for manufacturing a resin molded product includes both an injection unit using a screw and an injection unit using a plunger as an injection unit of an injection machine.

 In the apparatus for manufacturing a resin molded product, a high-pressure pulsating air wave generating means connected to the other end of the transport pipe is driven to supply a positive-pressure pulsating air wave into the transport pipe. When a positive pressure pulsating air wave is supplied into the transport pipe, the elastic membrane provided at the outlet of the solid additive storage tank connected at a position in the middle of the transport pipe causes the amplitude of the positive pressure pulsating air wave, Vibrates according to waveform, wavelength, frequency, etc.

 Therefore, if a constant positive pressure pulsating air wave is supplied into the transport pipe, the elastic film vibrates in a constant manner according to the amplitude, waveform, wavelength, frequency, and the like of the positive pressure pulsating air wave. As a result, a certain amount of the solid additive powder stored in the solid additive storage tank according to the amplitude, waveform, wavelength, frequency, etc. of the pulsating air wave of the positive pressure is determined by the elastic membrane. It is discharged from the hole into the transport pipe.

 The powder of the solid additive discharged into the transport pipe is immediately mixed with the positive pressure pulsating air wave supplied into the transport pipe and dispersed. Then, it is mixed with the pulsating air wave of positive pressure and dispersed, and pneumatically transported to the deaeration hopper connected to one end of the transport pipe.

 Thus, in this apparatus, a positive pressure pulsating air wave is used as a medium for transporting the powder of the solid additive through the transport pipe to one end of the transport pipe, instead of using the air at a constant pressure. As a result, in this apparatus, the adhesion and deposition of powder on the inner wall surface of the transport pipe and the phenomenon of powder blow-through in the transport pipe do not generally occur when steady pressure air is supplied into the transport pipe.

Therefore, the powder of the solid additive discharged into the transport pipe from the hole of the elastic membrane is pneumatically transported to the degassing hopper at the concentration at the time when the powder is discharged into the transport pipe. The solid additive powder mixed with a positive pressure pulsating air wave into the degassing hopper and pneumatically transported in a dispersed state, after degassing, flows from the outlet of the degassing hopper to the middle of the extruder cylinder. From the position, it is fed into the cylinder.

 In this resin molded product manufacturing apparatus, a positive pressure pulsating air wave is used as a medium for pneumatically transporting the solid additive powder to a predetermined position in the cylinder.

 If air is used as the medium for transporting the powder of the solid additive, the amount of the powder of the solid additive that is mixed and dispersed in the air used for pneumatic transport is reduced, so that the powder is supplied into the cylinder per hour. The amount of the solid additive powder can be extremely small. Thereby, the powder of the solid additive to be added to the resin raw material can be made extremely small.

 Also, in this resin molded product manufacturing apparatus, a positive pressure pulsating air wave is used as a medium for pneumatically transporting the solid additive powder, instead of a steady pressure air flow.

 When a positive pressure pulsating air wave is used, the amplitude, waveform, frequency, and wavelength of the positive pressure pulsating air wave can be reduced by adjusting the solid additive powder to be easily mixed and dispersed. It is also possible to mix and disperse a solid additive powder in a high concentration relative to the amount of air. This allows a large amount of solid additive powder to be added to the resin raw material. Therefore, if this apparatus is used, a desired amount of the solid additive powder can be stably and quantitatively supplied into the cylinder from a position in the middle of the cylinder of the extruder.

 The apparatus for producing a resin molded article can be used for various methods for producing a resin molded article having a different mixing ratio of a solid additive to a resin raw material.

Examples of the use of such a resin molded product manufacturing apparatus include, for example, various solid additives, an additive component that needs to be precisely fed to a resin raw material in a minute amount is stored in a solid carohydrate storage tank. Alternatively, the raw material storage hopper may contain a raw material resin and a solid additive other than the solid additive powder stored in the solid additive storage tank. Alternatively, only the raw material resin may be stored in the raw material storage hopper, and the solid additive powder may be stored in the solid additive storage tank.

 In addition, the raw material excluding the release agent powder may be stored in the raw material storage hopper, and the release agent powder may be stored in the solid additive storage tank.

 The method for producing a resin molded product according to claim 5 is a method for mixing and dispersing a powder of a solid additive, which is used in the method for producing a resin molded product according to claim 1 or claim 3, and dispersing the powder by vigorous transportation. When the pressure pulsating air wave mixes and disperses the solid additive powder, the pulsating air wave forms a spiral flow.

 In the method for producing a resin molded product, a positive pressure pulsating air wave that is in a swirling flow is used when mixing and dispersing the solid additive powder. As a result, the powder having a large particle diameter in the powder of the solid agent additive is broken down to a predetermined particle size by the swirling positive pulsating air wave. No agent powder is fed into the cylinder.

 When the powder of the large solid additive is fed into the cylinder, the amount of the solid additive in the cylinder at the location where the powder of the large solid additive is supplied is in relation to the amount of the molten raw material. Is formed.

 When a portion having a large amount of the solid additive relative to the amount of the solvent formed as described above is formed, quality unevenness occurs in a manufactured resin molded product. In the product manufacturing method, a large amount of solid additive powder is not supplied into the cylinder, so a portion of the cylinder containing a large amount of the solid carohydrate is formed relative to the amount of the molten raw material. Nothing.

 As a result, in the method of manufacturing a resin molded product, quality unevenness does not occur in the manufactured resin molded product.

The method for producing a resin molded product according to claim 6 is the method according to claim 1, 3, or 5. The powder of the solid additive used in the method for producing a resin molded product described above is a powder of a release agent.

 In this method for producing a resin molded product, a release agent powder is used as a solid additive powder, the release agent powder is stored in a raw material storage hopper, and the release agent powder is subjected to positive pressure pulsating air. It is mixed with the airwave and dispersed, and pneumatically transported to a position near the cylinder. After degassing, it is supplied to the cylinder from the middle of the cylinder. Thus, for example, when this method is applied to the extrusion molding method, the distance between the position where the raw material storage hopper is connected and the position where the release agent powder is supplied is located in the cylinder of the extruder. Does not contain any release agent. Therefore, during this time, since the screw cannot run idle due to the release agent, the molten raw material always moves in the die direction by rotating the screw of the extruder.

 Also, in the cylinder where the release agent powder is supplied, the raw material supplied into the cylinder is already in a molten state. By the way, the coefficient of friction acting between the molten raw material and the cylinder and between the molten material and the screw is extremely large. For this reason, the molten release agent does not act as a slip on the cylinder or screw even at the tip of the cylinder where the release agent powder is supplied.

For this reason, even if the screw is not allowed to run idle due to the release agent even in the cylinder at the tip of the location where the release agent powder was supplied, the screw of the extruder can be rotated. In this case, the molten material always moves in the die direction. As a result, if the screw of the extruder is rotated at a constant rotation speed, a certain amount of molten material is always extruded from the die. Thus, as long as the roller means provided downstream of the die is driven under a certain condition, a predetermined thick resin molded product can be manufactured. That is, when this method for producing a resin molded product is applied to an extrusion molding method, a fixed amount of a molten material can be constantly extruded from a die, so that a roller means provided downstream of the die is required. As long as it is driven under certain conditions, the manufactured resin molded products will not be out of specification.

 Also, instead of storing the powder of the release agent in the raw material storage hopper, the extruder has a cylinder that is connected to the raw material storage hopper and connected to the tip where the die is attached. It supplies powder of mold release agent that is mixed with and dispersed in positive pressure pulsating air waves and pneumatically transported.

 Thus, the supply amount of the release agent powder to the cylinders constituting the extruder can be changed only by changing the conditions of the positive pressure pulsating air wave that pneumatically transports the release agent powder.

 Therefore, if the worker notices during the extrusion molding process that a pattern like oil dripping is being formed on the surface of the resin molded product to be produced, the mold is released while the resin molded product is being produced. By changing the conditions of the positive pressure pulsating air wave that pneumatically transports the powder of the release agent, it is possible to change the compounding ratio of the release agent so as to be appropriate.

 This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

Further, for example, when this method is applied to an injection molding method, in the method for producing a resin molded product, the powder of the release agent is not stored in the raw material storage hopper. As a result, no release agent is contained in the cylinder that constitutes the injection unit of the injection molding machine between the position where the raw material storage hopper is connected and the location where the release agent powder is supplied. . Therefore, during this time, since the screw cannot run idle due to the release agent, if the screw is rotated, the molten raw material always moves to the tip in the cylinder. Also, in the cylinder where the release agent powder is supplied, the raw material supplied into the cylinder is already in a molten state. The friction coefficient acting between the molten material and the cylinder and between the molten material and the screw is extremely large. For this reason, the molten release agent does not act as a slip agent on the cylinder or the screw even on the tip side of the place where the powder of the release agent is supplied in the cylinder.

 For this reason, even if the screw is free to run idle due to the release agent even if it is closer to the tip than the place where the powder of the release agent is supplied in the cylinder, if the screw is rotated, it will melt. The raw material always moves to the tip inside the cylinder. At the same time, in the injection molding machine, when the screw is rotated to feed the molten material to the tip of the cylinder, the screw itself moves to the rear of the cylinder. Therefore, if the screw of the injection unit of the injection molding machine is rotated a fixed number of times and the amount of movement of the screw to the rear of the cylinder is regulated to a certain amount, a certain amount of molten raw material will always be at the tip of the cylinder. Can be stored.

 As a result, in this method of manufacturing a resin molded product, when the screw is extruded in the direction of the tip of the cylinder and the molten material is injected into the mold connected to the tip of the cylinder, excess or shortage occurs in the mold. And the optimal amount of molten material can be injected.

 As a result, in this method for producing a resin molded product, for example, the molten raw material injected into the mold is insufficient, and the resin molded product molded in the mold does not have chips or voids. In other words, when the method for producing a resin molded product is applied to the injection molding method, the optimal alu-j aiJ material can always be stably injected into the mold. Resin β¾¾ products do not become nonstandard defective products.

For this reason, the manufacturing efficiency of the resin molded article is significantly improved in the method of manufacturing the resin molded article as compared with the conventional injection molding method. Also, instead of storing the release agent powder in the raw material storage hopper, the tip of the cylinder that constitutes the injection unit of the injection unit is connected to the raw material storage hopper and the die. From this time, the powder of the release agent, which is mixed with the positive pressure pulsating air wave and dispersed and pneumatically transported, is supplied.

 As a result, the supply amount of the powder of the release agent to the cylinders constituting the injection unit of the injection molding unit is changed only by changing the conditions of the positive pressure pulsating air wave that pneumatically transports the release agent powder. be able to.

 Therefore, if the worker notices during the injection molding operation that a pattern such as oil dripping is being formed on the surface of the resin molded product to be manufactured, the operator will continue to manufacture the resin molded product. By changing the conditions of positive pressure pulsating air waves that pneumatically transport the release agent powder, the mixing ratio of the release agent can be changed so as to be appropriate.

 This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

 The apparatus for manufacturing a resin molded article according to claim 7 is the apparatus for manufacturing a resin molded article according to claim 2 or 4, further comprising a mixing chamber below the elastic membrane, wherein the mixing chamber has A pulsating air wave inlet, which is connected to the high-pressure pulsating air wave generating means, is provided below the mixing chamber in a substantially tangential direction of the mixing chamber, and is connected to a deaeration hopper above the mixing chamber. Outlets are provided approximately tangential to the mixing chamber.

 In the apparatus for manufacturing a resin molded product, as a mixing chamber provided below the elastic film, a pulsating air wave inlet, which is connected to the high-pressure pulsating air wave generating means, is provided at a position below the mixing chamber, in a substantially tangential direction of the mixing chamber. It is provided in.

 With this configuration, in the resin molded product manufacturing apparatus, the positive pressure pulsating air wave that enters the mixing chamber from the pulsating air wave introduction port turns in the mixing chamber.

When the elastic body fl is vibrated by the positive pressure pulsating air wave supplied into the mixing chamber, The powder of the solid additive is discharged into the mixing chamber through the holes provided in the body film. The powder of the solid additive discharged into the mixing chamber is entrained in a pulsating air wave of positive pressure swirling in the mixing chamber, whereby the powder of the solid additive having a large particle size is obtained. Will be crushed to a predetermined particle size.

 In the apparatus for manufacturing a resin molded product, the discharge port is provided at a position above the mixing chamber provided below the elastic film in a direction substantially tangential to the mixing chamber.

 As a result, pulsating air waves of positive pressure, which swirl in the mixing chamber, flow from the pulsating air wave inlet provided at the lower position of the mixing chamber to the discharge port provided at the upper position of the mixing chamber from below. The swirl flows upward. As a result, since the same sizing function as a cyclone is generated in the mixing chamber, the powder of the large solid additive swirls around the lower position in the mixing chamber, is crushed to a predetermined particle size, and then is discharged into the discharge port. Move to.

 As a result, large solid additive powder is not supplied into the cylinder from the degassing hopper.

 When the powder of the large solid additive is supplied into the cylinder, the powder of the large solid additive is supplied to the cylinder in the cylinder at the place where the powder is supplied. Large portions are formed.

 If a portion having a large amount of the solid additive relative to the amount of the solvent formed as described above is formed, quality unevenness occurs in a manufactured resin molded product. In the production method, the large solid additive powder is not supplied into the cylinder, so a portion of the cylinder in which the amount of the solid additive is larger than the amount of the molten raw material may be formed. Absent.

 As a result, in the method of manufacturing a resin molded product, quality unevenness does not occur in the manufactured resin molded product.

An apparatus for manufacturing a resin molded product according to claim 8 is the apparatus according to claim 2, 4, or 7. The solid additive powder used in the resin molded product manufacturing apparatus described above is a powder of a release agent.

 In the resin molding product manufacturing apparatus, a release agent powder is used as the solid additive powder.

 With this, when the resin molding product manufacturing apparatus is used as an extrusion molding apparatus, a fixed amount of molten raw material can always be stably extruded from the die. As long as it is driven under certain conditions, the resin molded product to be manufactured will not be out of specification.

 For this reason, the use of the apparatus for manufacturing a resin molded product reduces the frequency of occurrence of defective products as compared with a conventional extruder, thereby significantly improving the production efficiency of the resin molded product. Also, for example, when this apparatus is used as an injection molding apparatus, the optimum amount of molten material can always be stably injected into the mold, so that the resin molding produced in the mold can be performed. The product will not be out of specification.

 For this reason, the use of the resin molded product manufacturing apparatus reduces the frequency of occurrence of defective products as compared with the conventional injection molding apparatus, so that the production efficiency of the resin molded article is significantly improved. Furthermore, if the operator uses the manufacturing apparatus for the molded resin product, if the operator notices that a dripping oil-like pattern is being formed on the surface of the molded resin product to be produced, the resin is removed. By changing the conditions of pulsating air waves of positive pressure, which pneumatically transports the powder of the release agent while manufacturing β¾Β products, it is possible to change the compounding ratio of the release agent so as to be appropriate.

Therefore, if this method for producing a resin molded product is used, it is not necessary to wastefully dispose of the resin raw material. BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is an overall configuration diagram schematically illustrating an example of an apparatus for manufacturing a resin molded product according to the present invention.

 FIG. 2 is a schematic cross-sectional view showing, on an enlarged scale, a region surrounded by line II in FIG. FIG. 3 is a plan view schematically showing a release agent cutting means of the resin molded product manufacturing apparatus according to the present invention.

 FIG. 4 is a plan view schematically showing the position of a pulsating air wave inlet provided in the mixing chamber when the mixing chamber of the apparatus for manufacturing a resin molded product according to the present invention is viewed in plan. FIG. 4 is a diagram for explaining an ideal mounting position of the pulsating air wave inlet, and FIG. 4B is a diagram for explaining a substantially possible mounting position of the pulsating air wave inlet.

 FIG. 5 is a diagram schematically illustrating a positional relationship between a pulsating air wave introduction port and a discharge port provided in the mixing chamber when the mixing chamber of the apparatus for manufacturing a resin molded product according to the present invention is viewed in plan. Fig. 5 (a) is a diagram illustrating a substantially possible positional relationship between the pulsating air wave inlet and the outlet, and Fig. 5 (b) is a diagram illustrating the relationship between the pulsating air wave inlet and the outlet. It is a figure explaining a preferable positional relationship.

 FIG. 6 is an explanatory diagram schematically illustrating a phenomenon that occurs in an elastic film when a pulsating air wave is sent into the mixing chamber of the apparatus for manufacturing a resin molded product according to the present invention.

 FIG. 7 is a cross-sectional view schematically illustrating an example of a pulsating air wave generator used in the resin molded product manufacturing apparatus according to the present invention.

 FIG. 8 is a diagram schematically showing a positive pressure pulsating air wave generated by a pulsating air wave generator used in the resin molded product manufacturing apparatus according to the present invention, and FIG. Figure 8 (b) shows a pulsating air wave with positive pressure and a valley with atmospheric pressure, and a pulsating air wave with positive pressure and a valley with both atmospheric pressure. , Is shown as an example.

FIG. 9 is an overall configuration diagram schematically illustrating another example of the apparatus for manufacturing a resin molded product according to the present invention. FIG. 10 is an overall configuration diagram schematically showing an example of a resin molded product manufacturing apparatus (a so-called extruder) used in a conventional extrusion molding method.

 Fig. 11 shows a conventional resin molded product manufacturing device used in the conventional injection molding method.

1 is an overall configuration diagram schematically showing a so-called injection molding machine. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, the method for producing a resin molded product according to the present invention and the apparatus for producing a resin molded product according to the present invention will be described in more detail with reference to the drawings.

 (Embodiment 1)

 FIG. 1 is an overall configuration diagram schematically illustrating an example of an apparatus for manufacturing a resin molded product according to the present invention.

 The resin molded product manufacturing apparatus 1A includes a raw material storage hopper 2 that stores a raw material R that is a raw material of the resin molded product p, a die 3, and an extrusion unit 4A.

 The raw material storage hopper 2 is connected to the extrusion unit 4A at a position behind the extrusion unit 4A.

 In FIG. 1, 2a indicates the discharge port of the raw material storage hopper 2, and cl indicates the connection portion between the raw material storage hopper 2 and the extrusion unit 4A.

 The extruding unit 4 A is composed of a cylinder 41, a heater 42 provided outside the cylinder 41, a screw 43 rotatably housed in the cylinder 41, and a screw 43. Screw rotation means 44 A such as a motor for rotating the motor.

 The die 3 is connected to the tip end c2 of the cylinder 41.

The die 3 is provided with a resin molding port 3a having a shape similar to a resin molded product such as a slit. In this example, for example, a case where a plate-shaped resin molded product P such as a film or a sheet is manufactured using this apparatus 1A is shown, and such a plate-shaped resin molded product P is manufactured. In this case, as shown in FIG. 1, at the downstream side of the die 3, roll means 5a, 5b, 5... And a sheet material winding roll means 5c are provided. In each of the roll means 5a and the roll means 5b, a cooling liquid is circulated and circulated as necessary, and cools the molten raw material Rm extruded from the resin molding port 3a of the die 3. It has become.

 The above configuration is the same as the configuration of the conventional extruder 101 shown in FIG. 10, but the manufacturing apparatus 1A of the resin molded product is different from the conventional extruder 101 in the following points. Is different.

 That is, the resin molded product manufacturing apparatus 1A is newly provided at the high pressure pulsating air wave generating means 15, the solid additive storage tank 16, and the discharge port 16a of the solid additive storage tank 16. And a degassing hopper 8.

 The member device indicated by 14 A indicates a control device (arithmetic processing device) that controls and controls the entire resin molded product manufacturing device 1 A.

 The deaeration hopper 8 is connected to the cylinder unit 41 of the extrusion unit 4A at a position between the connection part c1 with the raw material storage hopper 2 and the tip part c2 where the die 3 of the cylinder 41 is connected. Have been.

 The high-pressure pulsating air wave generating means 15 is composed of an air source 15 A such as a blower for generating compressed air, and a flow adjusting means 1 for adjusting the flow rate of the compressed air generated by driving the air source 15 A. 5B and a pulsating air wave converter 1 that generates compressed air by driving the air source 15A and converts the compressed air whose flow rate has been adjusted by the flow rate adjusting means 15B into a pulsating air wave of positive pressure. 5C.

In this example, the air source 15 A is connected to the flow control means 15 B via the pipe T 1 Have been.

 Further, the flow rate adjusting means 15B is connected to the pulsating air wave converter 15C via the pipe T2.

 The pulsating air wave converter 15C is connected to a mixing chamber 20 provided below the elastic film 17 via a pipe (transport pipe) T3.

 The flow rate adjusting means 15B is composed of, for example, a solenoid type solenoid valve, is connected to the control device (arithmetic processing device) 14A via the signal line L1, and has a control device (arithmetic processing device). According to the command from 14A, the flow rate of the compressed air generated by driving the air source 15A can be adjusted to a predetermined flow rate.

 Further, for example, a solenoid valve 22 of a solenoid type is provided in the middle of the pipe (transport pipe) T2 to open and close the pipe T2. The solenoid valve 22 is connected to a control device (arithmetic processing device) 14A via a signal line L2 so that the pipe T2 can be opened and closed according to a command from the control device (arithmetic processing device) 14A. I'm sorry. Further, a branch pipe T 2 a is provided in the middle of the pipe T 2 between the flow rate adjusting means 15 B and the solenoid valve 22. The branch pipe T 2 a is made to communicate with the atmosphere. In the middle of the branch pipe T 2 a, for example, a solenoid-type solenoid valve 23 for opening and closing the branch pipe T 2 a is provided. Is provided. The solenoid valve 23 is connected to a control device (arithmetic processing device) 14A via a signal line L3 so that the branch pipe T2a can be opened and closed according to a command from the control device (arithmetic processing device) 14A. It has become.

 That is, if the electromagnetic valve 22 is opened and the electromagnetic valve 23 is closed by the control device (arithmetic processing device) 14A, the compressed air generated by driving the air source 15A is converted into a pulsating air wave converter. 15 C can be sent.

Also, the solenoid valve 22 is closed by the control device (arithmetic processing device) 14A, and the solenoid valve 2 If 3 is opened, the compressed air generated by driving the air source 15 A escapes to the atmosphere through the branch pipe T 2 a, and thus the solenoid valves 22 and When controlling 23, the supply of compressed air generated by driving the air source 15A to the pulsating air wave converter 15C without stopping the air source 15A is stopped. You can do it.

 The solid additive storage tank 16 is connected to a position in the middle of the pipe (transport pipe) T3, Τ4.

 In FIG. 1, 16a indicates the outlet of the solid additive storage tank 16.

 The outlet 16a is provided with an elastic film 17 having a hole 17a as shown in FIG. 3 so as to form a bottom surface of the outlet 16a.

 In FIG. 1, the member indicated by 16 b represents a lid, and the lid 16 b is detachably attached to the solid additive storage tank 16 and is attached to the solid additive storage tank 16. On the other hand, it can be mounted airtight.

 A mixing chamber 20 is hermetically mounted below the elastic film 17. The mixing chamber 20 and the pulsating air wave converter 15 C are connected by a pipe (transportation pipe) T 3, and the positive pressure pulsating air wave generated by the pulsating air wave converter 15 C is connected to the pipe. (Transport pipe) It is sent to the mixing chamber 20 via T3. The mixing chamber 20 and the degassing hopper 8 are connected via a pipe (transportation pipe) T 4, and the solid additive storage tank 1 is formed in the degassing hopper 8 by an elastic membrane 17. 6 and the powder W of the solid additive mixed and dispersed in the pulsating air wave of positive pressure and pneumatically transported in the mixing chamber 20 is degassed and then degassed. From the outlet 8a of the extruding unit 4A into the cylinder 41.

In addition, the member device shown by 8b shows the deaeration pipe of the deaeration hopper 8. This deaeration In the pipe 8b, the powder W of the solid additive which is pneumatically transported together with the pulsating air wave of the positive pressure when the pulsating air wave of the positive pressure is degassed into the deaeration hopper 8, is introduced into the atmosphere. A dust filter 9 is installed to prevent release.

 Further, in this example, the screw rotating means 44 A is connected to the control device (arithmetic processing device) 14 A via the signal line L 4, and is connected to the control device (arithmetic processing device) 14 A. The rotation speed of the rotating shaft of the screw rotating means 44 A can be controlled in accordance with the command.

 Further, the pulsating air wave converter 15C includes a rotation driving means m such as a motor or the like for rotating a cam mechanism for generating a pulsating air wave. The rotary driving means m is connected to a control device (computation processing device) 14 A via a signal line L 5, and is rotationally driven in accordance with a command from the control device (computation processing device) 14 A. The rotation speed of the rotating shaft of the means m can be controlled.

 Next, the portion surrounded by the line II in FIG. 1 in the resin molded product manufacturing apparatus 1A will be described in further detail.

 FIG. 2 is a schematic cross-sectional view showing an enlarged part surrounded by line II in FIG. In FIG. 1, a portion surrounded by a line II is a portion constituting a fixed-quantity feeder of the resin molded product manufacturing apparatus 1A (hereinafter, this portion is referred to as a fixed-quantity feeder 40). As described above, the elastic membrane 17 is provided at the outlet 16a of the solid additive storage tank 16 so as to form the bottom surface of the outlet 16a.

 More specifically, in this example, the elastic film 17 is provided below the powder material storage chamber 31 connected to the discharge port 16a of the solid additive storage tank 16 . FIG. 3 is a plan view schematically showing the elastic film 17.

The elastic film 17 is made of, for example, a synthetic rubber such as silicone rubber, and has a hole (a slit hole in this example) 17a at the center thereof. In the upper part 3 1a of the powder material storage chamber 3 1, the powder material cut-out valve 32 can be moved up and down to open and close the discharge port 16 a of the solid additive storage tank 16 It is provided in.

 A mixing chamber 20 is airtightly connected below the powder material storage chamber 31 with an elastic film 17 interposed therebetween.

 The lower part 3 lb of the powder material storage chamber 31 is made of glass, a resin such as polycarbonate acryl resin, or the like, and has light transmittance.

 The powder material storage chamber 31 is provided with a level sensor 33 for detecting the amount of powder of the release agent stored in the powder material storage chamber 31.

 The level sensor 33 includes a light emitting element 33a that emits light such as infrared light, and a light receiving element 33b that receives light emitted from the light emitting element 33a.

 The light emitting element 33a and the light receiving element 33b are arranged to face each other with the powder material storage chamber 31 interposed therebetween.

 Then, at the position where the level sensor 13 is provided (the height of the position where the level sensor 13 is provided from the elastic film 17), at H th, the release agent powder stored in the powder material storage chamber 31 is The amount can be detected.

 That is, the amount of the powder W of the solid additive stored in the powder material storage chamber 31 is determined by the position where the level sensor 33 is provided (the height of the position where the level sensor 13 is provided from the elastic body 17). When H th is exceeded, the light emitted from the light-emitting element 33a hits the solid additive powder W and cannot be received by the light-receiving element 33b (turns off). It can be detected that the height H of the powder W of the solid additive in the body material storage chamber 31 from the elastic film 17 exceeds the height Hth (H> Hth).

In addition, the amount of the release agent powder stored in the powder storage chamber 31 is determined by the position where the level sensor 13 is provided (the height of the position where the level sensor 13 is provided from the elastic film 17). If it is less than H th, the light emitted from the light emitting element 33 a can be received by the light receiving element 33 b (turned on). At this time, the solid additive in the powder material storage chamber 53 It can be detected that the height H of the powder W from the elastic film 17 is less than the height H th (H th H th).

 The powder discharge valve 32 moves up and down according to the value detected by the level sensor 33 so that the outlet 16a of the solid additive storage tank 16 can be closed or opened. I have.

 More specifically, when the detection value of the level sensor 33 is turned off, the powder material discharge valve 32 is moved upward, the outlet 16 a of the solid additive storage tank 16 is closed, When the detection value of the level sensor 13 turns on, the powder material cutout valve 32 is moved downward to open the discharge port 16a of the solid additive storage tank 16 so that the powder In the material storage chamber 31, an approximately constant amount of the powder W of the solid additive is always stored.

 In this example, the shape of the mixing chamber 20 is substantially cylindrical so that a swirling flow is easily generated in the mixing chamber 20.

 Here, an example is shown in which the shape of the mixing chamber 20 is substantially cylindrical, but the angle of the mixing chamber 20 is not particularly limited as long as a swirling flow can be generated in the mixing chamber 20. There is no.

 Further, the mixing chamber 20 is provided with a pulsating air wave introduction port 20a for sending a pulsating air wave in a position substantially below the mixing chamber 20 in a direction substantially tangential to the inner peripheral surface of the mixing chamber 20. In addition, the powder W of the solid additive mixed, dispersed, and fluidized with the air is mixed with the air from the mixing chamber 20 at a position above the mixing chamber 20 in a direction substantially tangential to the inner peripheral surface of the mixing chamber 20. An outlet 20b is provided for discharging.

Here, Fig. 4 shows the position of the pulsating air wave introduction port 20a provided in the mixing chamber 20. It will be described in further detail using the following.

 FIG. 4 is a plan view schematically showing the position of the pulsating air wave inlet 20 a provided in the mixing chamber 20 when the mixing chamber 20 is viewed in a plan view, and FIG. FIG. 4B is a diagram illustrating an ideal mounting position of a, and FIG. 4B is a diagram illustrating a substantially possible mounting position of the pulsating airwave inlet 20a.

 In each of FIGS. 4 (a) and 4 (b), the arrow indicated by a curve schematically indicates the direction of the pulsating air wave swirling flow generated in the mixing chamber 20.

 In order to generate a swirling flow in the mixing chamber 20, the pulsating air wave inlet 20a is preferably provided in a tangential direction of the mixing chamber 20, as shown in FIG.

 However, the pulsating air wave inlet 20a does not need to be strictly provided in the tangential direction of the mixing chamber 20, as shown in FIG. 4 (a). As far as possible, as shown in Fig. 4 (b), as shown in Fig. 4 (b), the direction equivalent to the tangent Lt direction of the mixing chamber 20 shown in Fig. 4 (a) (that is, the direction parallel to the tangent Lt with the mixing chamber 20) May be provided with a pulsating air wave inlet 20a.

 When the pulsating air wave inlet 20a is provided in the direction of the center line of the mixing chamber 20 (see the center line Lc shown by the imaginary line in FIG. 4 (b)), as shown in FIG. 4 (b). However, if the mixing chamber 20 has a cylindrical shape, two swirling flows, which cannot be said to be dominant, are generated, which is not preferable.

 Next, the positional relationship between the pulsating air wave inlet 20a and the outlet 20b provided in the mixing chamber 20 will be described in more detail with reference to FIG.

FIG. 5 is a diagram schematically illustrating the positional relationship between the pulsating air wave inlet 20 a and the outlet 2 Ob provided in the mixing chamber 20 when the mixing chamber 20 is viewed in a plan view. Fig. 5 is a diagram illustrating a substantially possible positional relationship between the pulsating air wave inlet 20a and the outlet 20b, and Fig. 5 (b) shows the pulsating air wave inlet 20a and the outlet 2 Ob. It is a figure explaining the preferable positional relationship of.

 Further, in each of FIGS. 5 (a) and 5 (b), an arrow indicated by a curve schematically indicates the direction of the swirling flow of the pulsating air wave generated in the mixing chamber 20.

 When the discharge port 2 Ob is provided in the mixing chamber 20 at the position shown in FIG. 5A, the direction of the swirling flow of the pulsating air wave generated in the mixing chamber 20 (the traveling direction of the air) ) And the outlet 2 Ob is provided in the opposite direction, and the discharge efficiency of the solid additive powder W dispersed and dispersed in the air at the outlet 2 Ob is not very good. . In consideration of the discharge efficiency of the powder W of the solid additive dispersed and dispersed in the air at the outlet 2 Ob, the outlet 2 O bi or the outlet 2 O b exemplarily shown in FIG. The direction of the swirling flow of the pulsating air wave generated in the S-chamber 20 as in the outlet 20 b 2

It is rather preferable that the discharge port 20b is provided in the forward direction with respect to the (moving direction of the air).

 In this example, a pulsating air wave converter 15c is connected to the pulsating air wave inlet 20a of the mixing chamber 20 via a pipe (transport pipe) T3.

 In addition, a pipe (transport pipe) T 4 is connected to the outlet 2 Ob.

In FIG. 2, the member device indicated by reference numeral 34 is imaging means such as a CCD camera provided for confirming the operation of the powder material cutting valve 32, and the member device indicated by reference numeral 35 is laser. In addition to irradiating light such as light rays and receiving the scattered light scattered by the release agent powder (not shown) falling from the outlet 16a of the solid additive storage tank 16, solid A sensor that checks the state of the release agent powder (not shown) that falls from the discharge port 16a of the additive storage tank 16a. The member device shown in 36 irradiates light such as a laser beam. At the same time, it falls from the hole (slit hole in this example) 17 a of the elastic film 17, is caught in the pulsating air wave of the swirling flow generated in the mixing chamber 20, mixes and disperses. To receive the scattered light scattered by the fluidized release agent powder (not shown). Thus, each of the sensors for checking the state of the release agent powder (not shown) in the mixing chamber 20 is shown.

 Further, the member device indicated by 37 indicates a level sensor configured to include a light emitting element 37a and a light receiving element 37b. In this example, the solid state is controlled by this level sensor 37. The remaining amount of the powder material in the additive storage tank 16 is detected. Note that these member devices 34, 35, 36, and 37 are provided as necessary.

 Next, the operation of the fixed-quantity feeder 40 will be described.

 First, when using the quantitative feeder 40 to supply the powder W of the solid additive mixed, dispersed, and fluidized into the pulsating air wave of positive pressure into the deaeration hopper 8, first, After the solid additive powder W is stored in the solid additive storage tank 16, the solid additive storage tank 16 is covered with the lid 16b.

 After that, the level sensor 33 is set to the operating state.

 In this state, the light such as infrared light emitted from the light emitting element 33a of the level sensor 133 is received by the light receiving element 33b, so that the light receiving element 33b is on.

 Next, the powder material cutout valve 32 is opened, and the powder W of the solid additive is dropped into the powder material storage chamber 31.

The powder W of the solid additive falls and accumulates in the powder material storage chamber 3 1, and the height H of the solid additive powder W accumulated in the powder material storage chamber 3 1 from the elastic body 17 is increased. When the height exceeds the height H th of the position where the level sensor 33 is provided, light such as infrared rays emitted from the light emitting element 33 a emits solid additive accumulated in the powder material storage chamber 31. Since the light is blocked by the powder W, the light receiving element 33b cannot receive the light emitted from the light emitting element 33a, so that the light receiving element 33b is turned off. At this time, automatically the powder Since the material extraction valve 32 is in the closed state, the solid additive powder W is stored from the elastic membrane 17 until the height becomes approximately a predetermined height Hth (H = Hth).

 Next, the air source 15 A is driven, the flow rate control device 15 B is adjusted using the control means (arithmetic processing device) 14 A, and the pulsating air wave conversion device 15 C By moving the driving source m at a desired speed, a pulsating air wave of positive pressure is generated in the pipe (transport pipe) T3.

 In the fixed-quantity feeder 40, a pulsating air wave inlet 20a for sending a pulsating air wave is provided below the mixing chamber 20 in a tangential direction of the inner peripheral surface of the mixing chamber 20 or in a direction equivalent thereto. And, at a position above the mixing chamber 20, on the inner peripheral surface of the mixing chamber 20, and in the mixing chamber 20, the discharge port is substantially forward in the traveling direction of the swirling pulsating air wave. Since 2 Ob is provided, the pulsating air wave sent into the mixing chamber 20 from the pulsating air wave introduction port 20 a is, as shown in FIG. From 0a, it becomes a pulsating air wave of a swirling flow (swirl flow like a tornado) heading from the bottom to the top toward the outlet 2 Ob.

 Since the pulsating air wave of the swirling flow generated in the mixing chamber 20 has not lost the property of the pulsating air wave, the elastic film 17 vibrates according to the frequency, amplitude and waveform of the pulsating air wave.

 FIG. 6 is an explanatory diagram schematically illustrating a phenomenon that occurs in the dielectric film 17 when a pulsating air wave of a positive pressure is sent into the mixing chamber 20.

 For example, when the pulsating air wave sent into the mixing chamber 20 is in a mountain state and the pressure in the mixing chamber 20 is increased, the elastic film 17 is elastically deformed as shown in FIG. 6 (a). Then, it curves upward.

At this time, the upper side of the hole (in this example, the slit hole) 17a is in a V-shaped open state, and the hole (in this example, the slit hole) 17a is in the open state, and A portion of the solid additive powder W stored in the material storage chamber 31 falls.

 Next, for example, when the pulsating air wave sent into the mixing chamber 20 shifts from a peak to a valley and the pressure in the mixing chamber 20 decreases, the elastic body deforms elastically and is curved upward. The membrane 17 returns to its original state due to the restoring force.

 At this time, the hole (the slit hole in this example) 17a that had been opened on the upper side also returned to its original state, and the upper side of the mosquito (in this example, the slit hole) 17a opened. A portion of the solid additive powder W that has fallen into the conditioned state is sandwiched between holes (in this example, slit holes) 17a (see FIG. 6 (b)).

 Next, for example, when the pulsating air wave sent into the mixing chamber 20 moves to the valley side and the pressure in the mixing chamber 20 decreases, as shown in FIG. The returned elastic film 17 elastically deforms and curves downward in response to the decrease in the restoring force and the pressure in the mixing chamber 20.

 At this time, the hole (in this example, the slit hole) 17a becomes an inverted V-shape with the lower side open, and the solid additive powder sandwiched in the hole (in this example, the slit hole) 17a W falls into the mixing chamber 20.

 Then, the powder W of the solid additive that has fallen into the mixing chamber 20 is mixed with the pulsating air wave circling in the mixing chamber 20, dispersed and fluidized, and is discharged from the outlet 2Ob. Along with the pulsating air wave of positive pressure, it is sent out to the pipe (transport pipe) T4.

 In the fixed-quantity feeder 40, the frequency, amplitude, and waveform of the elastic membrane 17 are determined and oscillated according to the frequency, amplitude, and waveform of the pulsating air wave, so that the frequency, amplitude, and waveform of the pulsating air wave are controlled. This alone has the advantage that a certain amount of powdered material can be stably supplied together with air into the pipe (transport pipe) T4.

Further, in the fixed-quantity feeder 40, since the pulsating air wave is swirled from the lower side to the upper side in the mixing chamber 20, the solid addition liquid dropped into the mixing chamber 20 is added. Many of the particles having a large particle diameter in the powder W of the agent are entrained in the swirling flow, are crushed to a desired particle diameter, and are discharged from the outlet 2 Ob.

 Further, since a swirling flow is generated from below to above in the mixing chamber 20, the mixing chamber 20 has the same particle-sizing function as a cyclone. As a result, large particles that have not been broken by the swirling flow stay at a lower position in the mixing chamber 20 until they are broken into predetermined particles, so that large particles are discharged to the outlet 2 Ob. It will not be sent.

 Therefore, by using this fixed-quantity feeder 40, a substantially constant amount of the powder W of the solid additive is always stably and continuously provided, and the particle diameter of the powder W of the solid additive is made uniform. Can be discharged from b.

 In addition, if this quantitative feeder 40 is used, most of the particles having a large particle size are crushed into a desired size by the pulsating air wave that has been swirled, and are discharged from the outlet 2 Ob. Particles having a large particle diameter hardly accumulate in the mixing chamber 20.

 Thereby, the number of operations for cleaning the inside of the mixing chamber 20 can be reduced.

 Thus, in the resin molding product manufacturing apparatus 1A, since the quantitative feeder 40 is used, when a resin product (for example, a film sheet) p is continuously manufactured by extrusion molding, There is no need to clean the mixing chamber 20.

 Therefore, if a resin molded product (for example, a film sheet) p is produced using the resin molded product production apparatus 1A, the mixing chamber is produced while the resin molded product (for example, a film sheet) p is produced. Productivity is extremely high because cleaning of 20 is no longer necessary.

Also, since the pulsating air wave inlet 20a is provided below the mixing chamber 20 and the discharge port 20b is provided above the mixing chamber 20, the pulsating air wave inlet 2a is provided in the mixing chamber 20. 0a and the outlet 20b do not face each other. As a result, the pulsating air wave sent from the pulsating air wave inlet 20 a does not directly enter the outlet 2 O b, but always enters the outlet 2 O b after swirling in the mixing chamber 20. Therefore, the pulsating air wave can be effectively used in the mixing chamber 20.

 In addition, since the discharge port 2 O b is provided on the inner peripheral side surface of the mixing chamber 20, the discharge port 20 b has an elastic body!] 17 holes (in this example, slit holes) 17 a There is no phenomenon that the powder W of the solid additive that has fallen from the outlet directly enters the outlet 20b without being mixed with the air.

 Further, since most of the solid additive powder W having large particles can be used, there is an effect that the solid additive powder W can be effectively used.

 Further, in the fixed-quantity feeder 40, the pulsating air waves are swirled in the mixing chamber 20 from the lower side to the upper side. Most of the particles having a large particle diameter are entrained in this swirling flow, crushed to a desired particle diameter, and discharged from the outlet 2 Ob.

 Further, in the fixed-quantity feeder 40, the powder material storage chamber 31 is provided with a level sensor 33 for detecting the amount of the powder W of the solid additive stored in the powder material storage chamber 31. The solid additive storage tank 16 is connected above the storage chamber 31 via the powder material cutout valve 32, and when the detection value of the level sensor 33 turns off, the powder # When the output valve 3 2 is closed and the detection value of the level sensor 3 3 is turned on, the powder material discharge valve 3 2 is opened, and the powder material storage chamber 31 is always filled with a roughly constant amount of solid additive. Powder W is stored.

 Thus, by keeping the pulsating air wave constant, it is possible to always discharge a certain amount of the powder W of the solid additive from the hole (slit hole in this example) 17 a of the elastic membrane 17. it can.

In this example, a sensor using a level sensor 133 will be described. However, this is merely a preferred example, and various sensors such as a weight sensor can be used as long as the amount of the powder W of the solid additive in the curd storage chamber 31 can be detected. Sensors can be used.

 Further, in this example, the case where the moss 17a of the elastic film 17 is a slit hole has been described. However, this is merely a preferable example, and the moss 17a is The hole is not limited to the slit hole, and may be a small hole. Further, the number of such mosquitoes 17a is not limited to one, but may be two or more.

 The amount of the solid additive discharged from the fixed-quantity feeder 40 can be adjusted according to the size and number of the holes 17a.

 Next, the configuration of a pulsating air wave converter 15C used in the resin molded product manufacturing apparatus 1A will be described.

 In the resin molded product manufacturing apparatus 1A, various devices can be used as the pulsating air wave converter 15C.

 Such a pulsating air wave conversion device 15C includes a pulsating air wave by opening and closing a solenoid valve of compressed air of a constant pressure generated by an air source 15A such as a compressor or a blower, or Source 15 A A constant pressure compressed air is supplied from an air inlet into a predetermined case, and a rotatable rotary type that opens and closes a discharge port provided in the case. It may be generated by providing a valve body of this type and rotating a one-piece valve body.

 However, the pulsating air wave generated by such a method can efficiently mix the powder with air, disperse and fluidize the pulsating air according to the physical properties of the powder material, pulsating the desired waveform, amplitude, and period. There is a problem that it is difficult to generate air waves.

In consideration of such a situation, or when a pulsating air wave that is difficult to attenuate is required, it is preferable to use a pulsating air wave generator as shown in FIG. FIG. 7 is a sectional view schematically showing such a pulsating air wave generator.

 The pulsating air wave conversion device 15 C is provided with a valve body 54 that is opened and closed by a cam mechanism 55 in a valve chamber 54 provided with a valve seat 53 between an input port 51 and an output port 52. 5 and 6 are provided.

 The cam mechanism 55 includes a rotary cam 57 rotatably provided by a driving means (not shown) such as a motor, and a roller 58 attached to a lower end of the valve body 56. .

 The valve seat 53 is formed as a recessed hole in the direction of the output port 52, and the valve body 56 is formed as a tapered inverted mortar that matches the shape of the valve seat 53. The valve seat 53 can be airtightly closed.

 Further, in this example, the shaft portion 56a of the valve body 56 is provided in the shaft hole 59h of the case body 59 so as to be free of air and to be movable up and down.

 The roller 58 is rotatably held by the rotating cam 57, and by rotating the rotating cam 57, the roller 58 moves up and down while rotating according to the uneven pattern provided on the rotating cam 57. I have.

 More specifically, the rotating cam 57 includes an inner rotating cam 57a and an outer rotating cam 57b.

 Each of the inner rotating cam 57 a and the outer rotating cam 57 b is provided with a concave / convex pattern so as to keep the gap between the apertures 58 and to be aligned with each other. The roller 58 is sandwiched between the inner rotating cam 57 a and the outer rotating cam 57 b, and by rotating the rotating cam 57 without causing splash on the valve body 56, According to the concave / convex pattern provided on the inner rotary cam 57a and the outer rotary cam 57b, the rotary cam moves up and down while rotating.

The uneven pattern provided on the rotating cam 57 may be different depending on the physical properties of the solid additive powder W. In this example, a flow controller 15B is connected to the input port 51 via a pipe (transport pipe) T2, and the input port 51 is generated by an air source 15A. Compressed air adjusted to a predetermined flow rate by the flow control device 15B is supplied.

 The output port 52 is connected to one end of a pipe (transport pipe) T3. In FIG. 7, reference numeral 60 denotes a flow rate adjustment port provided as necessary, and the flow rate adjustment port 60 has an output adjustment for adjusting the pressure of the pulsating air wave output from the output port 52. A valve 60 V is provided so as to be adjustable to a desired state from a state of complete communication with the atmosphere to a state of shutoff.

 Next, an operation procedure for generating a positive pressure pulsating air wave having a desired period, amplitude and waveform using the pulsating air wave converter 15C will be described.

 First, according to the physical properties of the solid additive powder W, the rotating cam 57, which can easily mix the solid additive powder W with air, rotates the pulsating air wave conversion device 15C rotation drive means m. Attach to axis ma.

 Next, by driving the air source 15 A and adjusting the flow control device 15 B, a predetermined flow rate of compressed air is supplied to the input port 52.

 Further, by driving a driving means (not shown), the rotating cam 57 is rotated at a predetermined rotation speed.

 Further, if necessary, the pressure of the pulsating air wave output from the output port 52 is adjusted by adjusting the output adjusting valve 60 v.

When the rotary cam 57 is rotated at a predetermined rotation speed, the valve body 56 moves up and down in accordance with the uneven pattern provided on the rotary cam 57. In this way, the valve seat 53 is controlled to be fully closed, half-opened, fully opened, or the like in accordance with, for example, a concavo-convex pattern provided on the rotary cam 57 to output a pulsating air wave having a desired waveform from the output port 52. I do. In the pulsating air wave converter 15C, the driving means (not shown) is controlled to control the rotational force in order to set the period of the pulsating air wave output from the output port 52 to a desired period. You can change the rotation speed of 5 7. Also, in order to make the amplitude of the pulsating air wave output from the output port 52 to a desired amplitude, the air source 15 A, the flow control device 15 B, and / or the output adjustment valve 61 may be appropriately adjusted. .

 By the above-mentioned operation, a positive pressure pulsating air wave with peaks at positive pressure and valleys at atmospheric pressure, as shown in Fig. 8 (a), and peaks and valleys as shown in Fig. Both can generate a pulsating air wave of atmospheric pressure and positive pressure.

 Next, a case will be described in which, for example, a film sheet is manufactured as a resin molded product having a predetermined film thickness by using the resin molding product manufacturing apparatus 11A.

 Here, the case where the powder of the release agent is used as the powder W of the solid additive will be described as an example.

 First, when a resin molded product (film sheet) p is manufactured, a die 3 having a slit-shaped resin molding opening 3a is used.

 Also, the raw material storage hopper 2 stores the raw material R, which is the raw material of the resin molded product (film sheet) p.

 At this time, the powder of the release agent is not stored in the raw material storage hopper 2. In addition, resin pellets in which the release agent powder is dispersed in advance are not accommodated.

 In addition, the solid additive storage tank 16 contains a release agent powder having a predetermined particle size. In addition, a rotating cam 57 having a concavo-convex pattern suitable for mixing and dispersing the release agent powder with air is attached to the rotating shaft ma of the rotating drive means m of the pulsating air wave converter 15C. .

Further, the rotation speed of each of the roll means 5a, 5b, 5 ··· and the sheet material winding roll means 5c is adjusted and rotated. In the case where the coolant can be circulated and circulated in each of the roll means 5a and 5b, the coolant is circulated and supplied in each of the roll means 5a and 5b. .

 Next, the heaters 42, ... of the extruder 4A are heated, and the screw rotating means 44A are driven to rotate, thereby rotating the screw 43. When the screw 43 is rotated, the raw material R discharged from the raw material storage hopper 2 into the cylinder 41 moves in the cylinder 41 toward the die 3 with the rotation of the screw 43.

 The raw material R discharged into the cylinder 41 is converted into the molten raw material Rm by the heat of the heaters 42 while moving in the direction of the die 3 in the cylinder 41.

 By the way, in this method of manufacturing a resin molded product, only the raw material R is stored in the raw material storage hopper 2 and the release agent powder is not stored. In addition, resin pellets in which the release agent powder is dispersed in advance are not accommodated.

 Therefore, the mold release agent does not exist in the region R nw in the cylinder 41 between the connection portion c1 with the raw material storage hopper 2 and the connection portion c2 with the deaeration hopper 8.

 For this reason, in this region R nw, if the release agent intervenes between the screw 43 and the molten raw material Rm, any phenomenon cannot occur, and the release agent causes the screw 43 to idle. Therefore, such a situation that the molten raw material Rm cannot be extruded in the die 3 direction does not occur.

 That is, in this region R nw, if the screw 43 of the extruder 4A is rotated, the molten raw material Rm always moves in the die 3 direction.

 In addition, the air source 15 A is driven to generate compressed air in the pipe (transport pipe) T1.

Also, using the control means (arithmetic processing unit) 14 A, and the flow rate adjusting means 15 B, The compressed air generated by driving the air source 15 A is adjusted to a desired flow rate. In addition, using the control means (arithmetic processing unit) 14 A, the solenoid valve 22 is opened, and the solenoid valve is opened.

23 is closed, and the rotation axis ma of the rotation driving means m of the pulsating air wave converter 15C is rotated at a predetermined rotation speed.

 Through the above operation, a desired positive pressure pulsating air wave is sent out from the pulsating air wave converter 15C into the pipe (transportation pipe) T3.

 The desired pulsating air wave of positive pressure delivered into the pipe (transport pipe) T3 passes through the pipe (transport pipe) T3 and is mixed from the pulsating air wave inlet 20a of the mixing chamber 20. It is supplied into the chamber 20.

 The pulsating air wave of positive pressure supplied from the pulsating air wave inlet 20 a into the mixing chamber 20 is swirling in the mixing chamber 20 from the pulsating air wave inlet 20 a to the outlet 2 Ob. It becomes.

In addition, the pulsating air wave of positive pressure supplied into the mixing chamber 20 from the pulsating air wave introduction port 20a caused the elastic body to have an elastic force of ¹⁷ as shown in Figs. 6 (a) to 6 (c). By repeating the above operation, the holes (slit holes in this example) 17a of the elastic film 17 are repeatedly opened and closed, so that a certain amount of the solid additive powder enters the mixing chamber 20. Is discharged.

 The powder W of the solid additive discharged into the mixing chamber 20 is mixed with the pulsating air wave swirling in the mixing chamber 20, dispersed and fluidized, and is discharged from the discharge port 2 Ob. Along with the pulsating air wave of positive pressure, it is sent to the pipe (transport pipe) T4.

 Thereafter, the powder W of the solid additive mixed and dispersed in the positive pressure pulsating air wave is pneumatically transported into the deaeration hopper 8 through the pipe (transport pipe) T4.

Then, into the deaeration hopper 8, the positive pressure pulsating air wave is mixed with the positive pressure pulsating air wave, and the releasing agent powder mixed with the positive pressure pulsating air wave and dispersed and pneumatically transported. Is degassed by the degassing pipe 8b and the release agent after the positive pressure pulsating air wave is degassed. The powder is discharged from the discharge port 8a of the deaeration hopper 8 into the cylinder 41 of the extruder 4A.

 The release agent powder discharged from the discharge port 8a of the deaeration hopper 8 is rotated by a screw 43 to connect the connection part c1 with the raw material storage hopper 2 and the connection part between the deaeration hopper 8 c is added to the molten material Rm extruded from the region R nw that is extruded from the region R nw, and is mixed with the molten material Rm sequentially by the rotation of the screw 43. .

 By the way, at the location c3 of the cylinder 41 where the release agent powder is supplied, the raw material R supplied into the cylinder 41 is already in a molten state. The friction coefficient acting between the shoulder material R m and the cylinder 41 and between the solution fflj material R m and the screw 43 is extremely large. Therefore, even in the cylinder 41, on the tip side of the location c3 where the powder of the release agent is supplied, the molten release agent is supplied to the cylinder 41 1 screw 43 with the slip agent. Never work as.

 For this reason, even in the cylinder 41, the screw 43 cannot run idle due to the release agent even at the tip side from the location c3 where the release agent powder is supplied. By rotating the screw 43 of A, the molten raw material Rm always moves in the die 3 direction.

 Thus, if the screw 43 of the extrusion unit 4A is rotated at a constant rotational speed, a certain amount of the molten raw material Rm is always extruded from the die 3.

 Therefore, as long as the roller means 5a, 5b, 5 ■ 5, 5c provided downstream of the die 3 are driven under certain conditions, it is necessary to manufacture a resin molded product p having a predetermined film thickness. Can be.

That is, when this method for producing a resin molded product is applied to the extrusion molding method, a fixed amount of the molten raw material Rm can be constantly extruded from the die 3 in a stable manner. As long as the roller means 5a, 5b5, 5 and 5c provided downstream are driven under certain conditions, the manufactured resin I product p may become a nonstandard defective product. Absent.

 Also, instead of storing the powder of the release agent in the raw material storage hopper 2, the connecting portion c1 of the cylinder 134 constituting the extruder 1A with the raw material storage hopper 2 and the die 3 are attached. The powder of the release agent, which is mixed with the pulsating air wave of positive pressure and pneumatically transported in a dispersed state from the tip portion c1, is supplied. As a result, the supply amount of the release agent powder to the cylinder 43 constituting the extruder 1A can be changed only by changing the conditions of the positive pressure pulsating air wave that pneumatically transports the release agent powder. be able to.

 Therefore, if the worker notices during the extrusion molding operation that a pattern like oil dripping is being formed on the surface of the resin molded product p to be produced, By changing the conditions of the positive pressure pulsating air wave, which pneumatically transports the release agent powder, the mixing ratio of the release agent can be changed so as to be appropriate.

 This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

 In addition, in the resin molded product manufacturing apparatus 1A, a quantitative feeder 40, more specifically, an elastic membrane having a stalk (a slit hole in this example) 17a as the elastic membrane 17 is used. Used.

 If the frequency, amplitude and waveform of the positive pressure pulsating air wave supplied into the pipe (transportation pipe) T3 are kept constant, the elastic membrane constituting the elastic membrane 17 will be A certain amount of the powder of the release agent is discharged from the mosquito (in this example, the slit hole) 17a into the mixing chamber 20 by vibrating up and down at a constant rate with the peripheral portion as a node.

Further, the powder of the release agent discharged into the mixing chamber 20 pulsates at a positive pressure in the mixing chamber 20. It is mixed with and dispersed by the air wave, discharged into the pipe (transportation pipe) T4 together with the pulsating air wave of positive pressure, and powered by the degassing popper 18 via the pipe (transportation pipe) T4. Will be transported.

 The powder of the release agent mixed with the positive pressure pulsating air wave and pneumatically transported in a dispersed state in the degassing popper 8 is degassed by the degassing popper 8 and then in the cylinder 41. Supplied to

 In this device 1A, a positive pressure pulsating air wave is supplied into the pipe (transportation pipe) T4, so that the release agent powder is mixed with the positive pressure pulsating air wave and dispersed. And is transported to the degassing popper 18 by pneumatic.

 This makes it possible to accumulate release agent powder on the inner wall of the pipe (transportation pipe) T4, as in the case where air of a steady pressure flow is flowed into the pipe (transportation pipe) T4. (Transportation pipe) No blow-through phenomenon occurs in the release agent powder in T4.

 Therefore, the release agent powder mixed and dispersed in the positive pressure pulsating air wave has the same concentration as that at the time when the release agent powder is mixed and dispersed in the positive pressure pulsation air wave, As a result of being pneumatically transported to the degassing popper 18, the release agent powder having the desired concentration can be stably supplied continuously into the cylinder.

 As a result, a constant amount of powder of the release agent can be always supplied into the cylinder 41 from the discharge port 8a of the deaeration popper 8, so that the cylinder 4 can be supplied from the discharge port 8a of the deaeration popper 8. The supply amount of the powder of the release agent into 1 can always be maintained at an optimum constant amount.

As a result, during the production of the resin molded product p, the supply amount of the release agent powder into the cylinder 41 decreases during the production, and the surface of the roller means 5a and / or the surface of the roller means 5b are reduced. Then, the molten raw material Rm is stuck, and conversely, the supply amount of the release agent powder into the cylinder 41 increases, and the surface of the roller means 5a and / or the roller If the release agent causes a dripping phenomenon on the surface of the means 5 b, and if the dripping phenomenon causes a pattern such as oil dripping to be formed on the surface of the resin molded product p to be manufactured, Nothing happens.

 Also, instead of storing the powder of the release agent in the raw material storage hopper 2, the extruder 4A has a connection part c1 with the raw material storage hopper 2 and a tip part c2 to which the die 3 is connected. The deaeration hopper 8 connected between the two supplies the release agent powder that is mixed with the positive pressure pulsating air wave and dispersed and pneumatically transported.

 Thus, the supply amount of the release agent powder to the cylinder 41 of the extruder 1A can be changed only by changing the condition of the positive pressure pulsating air wave that pneumatically transports the release agent powder. .

 Therefore, for example, if the worker notices that a pattern like oil dripping is being formed on the surface of the resin molded product p to be manufactured during the extrusion molding operation, the resin molded product P is manufactured. Change the conditions of the positive pressure pulsating air wave, which pneumatically transports the release agent powder, while adjusting the flow rate adjusting means 15 B by using a controller (computing unit) 14 A The source of the compressed air generated by driving the source 15 A is reduced to the pulsating air-to-air wave converter 15 C, etc.), so that the mixing ratio of the release agent is changed to be appropriate. Can be.

Conversely, for example, an operator may find that the molten raw material Rm extruded from the resin molding port 3a of the die 3 is on the surface of the roller means 5a and / or the surface of the roller means 5b. If you notice that it appears to be sticking, change the conditions of the positive pressure pulsating air wave that pneumatically transports the release agent powder while manufacturing the resin molded product p (for example, Controller (arithmetic processing unit) Supply amount of compressed air generated by driving air source 15 A by adjusting flow rate adjusting means 15 B by 14 A to pulsating air wave converter 15 C Can be changed so that the mixing ratio of the release agent is appropriate. Can be.

 This eliminates the need to wastefully dispose of the raw material R as seen when using a conventional resin molded product manufacturing apparatus.

 Further, in the resin molded product manufacturing apparatus 1A, as a mixing chamber 20 provided below the elastic film 17, the mixing chamber 20 is connected to the high-pressure pulsating air wave generating means 15 at a position below the mixing chamber 20. The pulsating air wave introduction port 20a is provided substantially in a tangential direction of the mixing chamber 20. As a result, the positive pressure pulsating air wave that has entered the mixing chamber 20 through the pulsating air wave introduction port 20a turns in the mixing chamber 20.

 The elastic film 17 is vibrated by the pulsating air wave of positive pressure supplied into the mixing chamber 20, so that the holes provided in the elastic film 17 (in this example, the slit holes) 17 The powder of the release agent that has fallen into the mixing chamber 20 through a is entrained in the positive pressure pulsating air wave that is swirling in the mixing chamber 20, thereby releasing the mold. Among the powders of the agent, those having a large particle size are crushed until they reach a predetermined particle size.

 Further, in the resin molding product manufacturing apparatus 1A, as the mixing chamber 20 provided below the elastic film 17, the discharge port 2 Ob is provided above the mixing chamber 20, and the mixing chamber 20 is generally provided. It is provided in the tangential direction.

 Accordingly, the pulsating air wave of positive pressure that swirls in the mixing chamber 20 is provided at a position above the mixing chamber 20 from the pulsating air wave inlet 20 a provided at the lower position of the mixing chamber 20. A swirl flows from the bottom to the top toward the discharged outlet 2 Ob. As a result, a particle-sizing function similar to that of a cyclone occurs in the mixing chamber 20, so that the powder of the large release agent swirls at a lower position in the mixing chamber 20 and crushes to a predetermined particle size. Then move into outlet 2 Ob.

Thus, large release agent powder is not supplied from the degassing hopper 8 into the cylinder 41 of the extrusion unit 4A. As a result, it is impossible that a portion where the amount of the release agent is larger than the amount of the molten raw material Rm contacts the surface of the roller means 5a and / or the surface of the roller means 5b close to the die 3. As a result, no drip-like pattern is formed on the manufactured resin molded product.

 Here, the description has been made mainly of the example in which the powder of the release agent is used as the powder of the solid additive. However, the powder of the solid additive is not limited to the powder of the release agent. Agents, ultraviolet absorbers, stabilizers, filling and reinforcing agents, foaming agents, flame retardants, antistatic agents, crosslinking agents, stabilizers, coloring agents, and the like.

 In this method of manufacturing a resin molded product, a pneumatic transportation method using a positive pressure pulsating air wave is employed as a method of transporting the solid additive powder to a predetermined position in the cylinder. By varying the amount of the powder of the solid additive to be added to the constituent resin, the material properties of the resin molded article can be varied according to the purpose.

 In addition, when powders of various solid additives are used, an additive component that needs to be accurately fed in a minute amount into a resin raw material is stored in a solid additive storage tank, and the raw material is stored in a raw material storage hopper. Alternatively, a raw material resin and a solid additive other than the solid additive powder contained in the solid additive storage tank may be stored.

 Alternatively, only the raw material resin may be stored in the raw material storage hopper, and the solid additive powder may be stored in the solid additive storage tank.

 In addition, the raw material excluding the release agent powder may be stored in the raw material storage hopper, and the release agent powder may be stored in the solid additive storage tank.

Furthermore, the number of solid additive storage tanks, degassing hoppers, quantitative feeders, and high-pressure pulsating air wave generation means is not limited to one set, but may be set as many as necessary according to the type of solid additive. It may be. Further, in the first embodiment of the present invention, the apparatus having the powder material storage chamber 31 and the mixing chamber 20 has been described as the resin molded product manufacturing apparatus 1A, but this is merely a preferable example. As shown, the outlet 16a of the solid additive reservoir 16 is directly connected to the middle of the transport pipe, and the outlet 16a forms the bottom of the solid additive reservoir 16 at the outlet 16a. Thus, an elastic membrane 17 having mosquitoes 17a is provided, a high-pressure pulsating air wave generating means 15 is connected to one end of the transport pipe, and a deaeration hopper 8 is connected to the other end of the transport pipe. The present invention also includes an apparatus for manufacturing a resin molded product in which the discharge port of the degassing hopper 8 is connected to a position C3 in the middle of a cylinder 41 constituting an extrusion unit of an extruder.

 Further, in the first embodiment of the present invention, as the resin molded product manufacturing apparatus 1A, the basic configuration of the extrusion unit is a single-screw extruder having one screw. Of course, this is merely an example, and it goes without saying that the apparatus for manufacturing a resin molded product according to the present invention includes a multi-screw extruder having two or more screws as a basic configuration of an extrusion unit. .

 (Embodiment 2)

 FIG. 9 is an overall configuration diagram schematically illustrating another example of the apparatus for manufacturing a resin molded product according to the present invention.

 The resin molded product manufacturing apparatus 1B includes a raw material storage hopper 2 that stores a resin raw material that is a raw material of the resin molded product, a mold 7, and an injection unit 4B.

 The raw material storage hopper 2 is connected to the injection unit 4B at a position behind the injection unit 4B.

 In FIG. 11, 2a indicates an outlet of the raw material storage hopper 2, and c1 indicates a connection portion between the raw material storage hopper 2 and the injection unit 4B.

 The mold 7 includes a fixed mold 7a and a movable mold 7b.

The fixed mold 7a is configured so that the tip end c2 of the injection unit 4B is in contact with the fixed mold 7a. Note that the member device indicated by 7e indicates an ejector 1, and the ejector 7e is provided so as to be able to protrude and retract from the surface of the movable mold 7b.

 The injection unit 4B is movable as a whole with respect to the mold 7 so as to be able to move forward and backward.

 The injection unit 4B is accommodated in the cylinder 41, heaters 42 provided outside the cylinder 41, rotatably in the cylinder 41, and forward and backward in the cylinder 41. The screw 43 and the screw rotating / extruding means 44B for rotating the screw 43 and for moving the screw 43 toward the tip end of the extruder unit 4B and retreating it. Prepare.

 The screw rotating / extruding means 44 B is rotatable by screw rotating means (not shown) such as an electric motor. In addition, the screw rotating and pushing means 44 B can push the screw 43 forward or move the screw 43 to the rear of the cylinder 141 by hydraulic means (not shown). .

 When the screw rotating / extruding means 44 B is driven to rotate, the screw 43 rotates, and the raw material R supplied into the cylinder 41 is fed to the front of the cylinder 41. At this time, the raw material R moving forward in the cylinder 41 receives heat from the heater 42, and is converted into a molten raw material Rm.

 The screw 43 itself moves (retreats) to the rear side of the cylinder 41 by feeding the raw material R and / or the molten raw material Rm forward.

 The above configuration is the same as that of the other injection molding apparatus 201 shown in FIG. 11, but this resin molded product manufacturing apparatus 1B is different from the conventional resin molded product manufacturing apparatus in the following points. It is different from device 101B.

That is, this resin molded product manufacturing apparatus 1 B is newly provided with a high-pressure pulsating air wave generating means 1. 5, a solid additive storage tank 16, an elastic membrane 17 provided at an outlet 16 a of the solid additive storage tank 16, and a deaeration hopper 8.

 The member device indicated by 14B represents a control means (arithmetic processing device) for controlling and controlling the entire resin molding product manufacturing apparatus 1B.

 The deaeration hopper 8 is connected to the cylinder 41 of the injection unit 4B at a position between the connection part c1 with the raw material storage hopper 2 and the tip part c2 to which the fixed mold 7a is connected. I have.

 The high-pressure pulsating air wave generating means 15 is composed of an air source 15 A such as a probe for generating compressed air, and a flow adjusting means 1 for adjusting the flow rate of the compressed air generated by driving the air source 15 A. 5B and a pulsating air wave converter 1 that generates compressed air by driving the air source 15A and converts the compressed air whose flow rate has been adjusted by the flow rate adjusting means 15B into a pulsating air wave of positive pressure. 5C.

 Also in this example, the air source 15A is connected to the flow rate adjusting means 15B via the pipe T1.

 Further, the flow rate adjusting means 15B is connected to the pulsating air wave converter 15C via the pipe T2.

 The pulsating air wave converter 15C is connected to a mixing chamber 20 provided below the elastic membrane 17 via a pipe (transport pipe) T3.

 The flow rate adjusting means 15 B is formed of, for example, a solenoid type solenoid valve, and is connected to a control device (arithmetic processing device) 14 A via a signal line L 1. (Processing unit) According to the command from 14 A, the flow rate of the compressed air generated by driving the air source 15 A can be adjusted to a predetermined flow rate.

Further, for example, a solenoid valve 22 of a solenoid type is provided in the middle of the IS pipe T2 to open and close the rooster pipe T2. This solenoid valve 22 is controlled via a signal line L2. It is connected to a control device (arithmetic processing unit) 14 A, and can open and close the pipe T 2 in accordance with a command from the control unit (arithmetic processing unit) 14 A.

 Further, a branch pipe T 2 a is provided in the middle of the pipe T 2 between the flow rate adjusting means 15 B and the solenoid valve 22. The branch pipe T 2 a is designed to communicate with the atmosphere. In the middle of the branch pipe T 2 a, for example, a solenoid valve 2 is provided to open and close the branch pipe T 2 a. Three are provided. The solenoid valve 23 is connected to a control unit (arithmetic processing unit) 14 A via a signal line L 3. In accordance with a command from the control unit (arithmetic processing unit) 14 A, the branch pipe T 2a can be opened and closed.

 That is, if the solenoid valve 22 is opened and the solenoid valve 23 is closed by the control device (processing unit) 14 A, the compressed air generated by driving the air source 15 A pulsates. The air wave converter can be sent to 15 C.

 Also, if the solenoid valve 22 is closed and the solenoid valve 23 is opened by the control device (arithmetic processing device) 14 A, the compressed air generated by driving the air source 15 A will be In order to escape to the atmosphere through the branch pipe T2a, when the solenoid valves 22 and 23 are controlled in this way, the air source 15A can be connected without stopping the air source 15A. The supply of the compressed air generated by the drive to the pulsating air wave converter 15 C can be stopped.

 The solid additive storage tank 16 is connected to a position in the middle of the pipe (transport pipe) T3, Τ4.

 In FIG. 9, 16 a indicates the outlet of the solid additive storage tank 16.

 The discharge port 16a is provided with an elastic film 17 having a contact 17a as shown in FIG. 3 so as to form a bottom surface of the discharge port 16a.

In FIG. 9, the member indicated by 16b indicates a lid, and the lid 16b is a solid. It is detachable from the additive storage tank 16 and can be airtightly attached to the solid additive storage tank 16.

 A mixing chamber 20 is hermetically mounted below the elastic film 17. The mixing chamber 20 and the pulsating air wave converter 15 C are connected by a pipe (transportation pipe) T 3, and the positive pressure pulsating air wave generated by the pulsating air wave converter 15 C is connected to the pipe. (Transport pipe) It is sent to the mixing chamber 20 via T3. The mixing chamber 20 and the degassing hopper 8 are connected via a pipe (transportation pipe) T 4, and the solid additive storage tank 1 is formed in the degassing hopper 8 by an elastic membrane 17. The solid additive powder W, which is mixed, dispersed and pneumatically transported into the positive pressure pulse air wave in the mixing chamber 20 in the mixing chamber 20, is degassed and then degassed. From the discharge outlet 8a of 8, the fuel is supplied into the cylinder 41 of the injection unit 4B.

 In addition, the member device shown by 8b shows the deaeration pipe of the deaeration hopper 8. In the deaeration pipe 8b, the powder W of the solid additive that is pneumatically transported together with the positive pressure pulsating air wave when the positive pressure pulsating air wave is deaerated into the deaeration hopper 8, A dust collection filter 9 is installed to prevent release to the atmosphere.

 Further, in this example, the screw rotating / extruding means 44 B is connected to the control device (computation processing device) 14 A via the signal line L 4, and the control device (computation processing device) 14 A The rotation speed of the rotating shaft of the screw rotating / extruding means 44 B can be controlled in accordance with an instruction from the user.

Further, the pulsating air wave converter 15C is provided with a rotation driving means m such as a motor such as a motor for rotating a cam mechanism for generating a pulsating air wave. The motor m is connected to a controller (arithmetic processing unit) 14A via a signal line L5, and according to a command from the controller (arithmetic processing unit) 14A, the rotation of the rotating shaft of the motor m is performed. speed Can be controlled.

 In FIG. 9, the configuration of the quantitative feeder 40 surrounded by the line II is the same as the configuration of the quantitative feeder 40 shown in FIG. 2, and the configuration of the elastic membrane 17 is also the same as that of FIG. Since the configuration is the same as that of the elastic film 17 shown in FIG.

 Also, the configuration of the pulsating air wave converter 15C is the same as that of the elastic film 17 of the resin molded product manufacturing apparatus 1A shown in FIG. 1 (see FIG. 7). Omitted. The positional relationship between the pulsating air wave inlet 20a and the outlet 20b provided in the mixing chamber 20 is the same as that of the mixing chamber 20 of the resin molded product manufacturing apparatus 1A shown in FIG. 4 and FIG. 5.) Therefore, the description is omitted here.

 Next, a case where a resin molded product p having a desired shape is produced by using the resin molded product production apparatus 1B will be described.

 Here, the case where the powder W of the release agent is used as the powder W of the solid additive will be described as an example.

 When manufacturing the resin molded product P, first, as a fixed mold 7a and a movable mold 7b, with these being clamped, the shape of the resin molded product to be manufactured is placed in the mold 7. And the one on which a gun-shaped surface of an inverted shape is formed.

 The raw material R of the resin molded product p is stored in the raw material storage hopper 2.

 At this time, the raw material storage hopper 2 does not contain the powder of the release agent. In addition, resin pellets in which the release agent powder is dispersed in advance are not accommodated.

 In addition, the solid additive storage tank 16 contains a release agent powder having a predetermined particle size. In addition, a rotating cam 57 having a concavo-convex pattern suitable for mixing and dispersing the release agent powder with air is attached to the rotating shaft ma of the rotating drive means m of the pulsating air wave converter 15C. .

Next, the fixed mold 7a and the movable mold 7b are clamped (mold clamping step). In addition, a rotating cam 57 having a concavo-convex pattern suitable for mixing and dispersing the release agent powder with air is attached to the rotating shaft ma of the rotating drive means m of the pulsating air wave converter 15C. .

 In addition, using the control means (arithmetic processing unit) 14B, the flow rate adjusting means 15B adjusts the compressed air generated by driving the air source 15A to a desired flow rate. Next, the heating unit 42 is heated to a predetermined temperature, and when the cylinder 141 of the injection unit 4B is heated to the predetermined temperature, the control means (arithmetic processing unit) 14B is turned on. Execute the stored operation program.

 In addition, the screw 43 is rotated at a predetermined rotation speed by rotating the screw rotating / extruding means 44 B.

 When the screw rotation / extruding means 4 4 B is driven to rotate at a predetermined rotation speed, the screw 43 rotates at a predetermined rotation speed, and the rotation of the screw 43 causes the raw material to be stored in the raw material storage hopper 2. The raw material R containing no release agent powder is supplied into the cylinder 41 from the outlet 2 a of the raw material storage hopper 2.

 The raw material R supplied into the cylinder 41 and not containing the release agent powder moves in the cylinder 41 in the direction of the fixed mold 7 b with the rotation of the screw 43.

 The raw material R not containing the release agent powder is converted into a molten raw material Rm by the heat of the heater 42 while moving in the cylinder 41 in the direction of the fixed mold 7b.

By the way, in this method for manufacturing a resin molded product, only the raw material R is accommodated in the raw material storage hopper 2, and the powder of the release agent is not accommodated. Further, resin pellets in which the release agent powder is dispersed in advance are not accommodated. Accordingly, the mold release agent does not exist in the region R nw in the cylinder 41 between the connection portion c1 with the raw material storage hopper 2 and the connection portion c2 with the deaeration hopper 8. For this reason, in this region R nw, when the release agent intervenes between the screw 43 and the molten raw material Rm, any phenomenon cannot occur, and the release agent causes the screw 43 to run idle due to the release agent. However, such a situation that the molten raw material Rm cannot be extruded in the die 3 direction does not occur.

 That is, in this region R nw, if the screw 43 of the extruder 4A is rotated, the molten raw material Rm always moves in the direction of the mold 7.

 At the same time as the start of the injection molding operation, the air source 15A is driven to generate compressed air in the pipe (transportation pipe) T1.

 In addition, using the control means (arithmetic processing unit) 14 A, the flow rate adjusting means 15 B adjusts the compressed air generated by driving the air source 15 A to a desired flow rate. In addition, using the control means (arithmetic processing unit) 14 A, the solenoid valve 22 is opened, the solenoid valve 23 is closed, and the rotation drive means m of the pulsating air wave converter 15 C is rotated by the rotation axis ma. Is rotated at a predetermined rotation speed.

 Through the above operation, a desired positive pressure pulsating air wave is sent out from the pulsating air wave converter 15C into the pipe (transportation pipe) T3.

 The desired pulsating air wave of positive pressure delivered into the pipe (transport pipe) T3 passes through the pipe (transport pipe) T3 and is mixed from the pulsating air wave inlet 20a of the mixing chamber 20. It is supplied into the chamber 20.

 The pulsating air wave of positive pressure supplied from the pulsating air wave inlet 20 a into the mixing chamber 20 is swirling in the mixing chamber 20 from the pulsating air wave inlet 20 a to the outlet 2 Ob. It becomes.

In addition, the elastic membrane 17 was shown in Figs. 6 (a) to 6 (c) by the positive pressure pulsating air wave supplied into the mixing chamber 20 from the pulsating air wave inlet 20a. The above operation is repeated, and the holes (slit holes in this example) 17 a of the elastic membrane 17 repeatedly open and close As a result, a certain amount of the solid additive powder W is discharged into the mixing chamber 20.

 The powder W of the solid additive discharged into the mixing chamber 20 is mixed with the pulsating air wave swirling in the mixing chamber 20, dispersed and fluidized, and is discharged from the discharge port 2 Ob. Along with the pulsating air wave of positive pressure, it is sent to the pipe (transport pipe) T4.

 Thereafter, the powder W of the solid additive mixed and dispersed in the positive pressure pulsating air wave is pneumatically transported into the deaeration hopper 8 through the pipe (transport pipe) T4.

 Then, into the deaeration hopper 8, the positive pressure pulsating air wave is mixed with the positive pressure pulsating air wave, and the releasing agent powder mixed with the positive pressure pulsating air wave and dispersed and pneumatically transported. After degassing by the degassing pipe 8 b and degassing the pulsating air wave of positive pressure, the powder of the release agent is discharged from the discharge port 8 a of the degassing hopper 8 through the cylinder 4 of the injection unit 4 B Discharged into 1

 The release agent powder discharged from the discharge port 8a of the deaeration hopper 8 is rotated by the screw 43 to connect the connection part c1 with the raw material storage hopper 2 and the deaeration hopper 8. Is added to the molten raw material Rm extruding from the region R nw between the part c 2 and containing no release agent, and is sequentially mixed with the molten raw material R m by the rotation of the screw 43 to be uniform. You.

 By the way, at the location c3 of the cylinder 41 where the release agent powder is supplied, the raw material R supplied into the cylinder 41 is already in a molten state. The coefficient of friction acting between the starter charge R m and the cylinder 41 and between the melt feed source R m and the screw 43 is extremely large. Therefore, even in the cylinder 41, on the tip side of the location c3 where the powder of the release agent is supplied, the molten release agent is supplied to the cylinder 41 1 screw 43 with the slip agent. Never work as.

For this reason, even in the cylinder 41, the screw 43 may idle due to the release agent on the tip side from the location c3 where the powder of the release agent is supplied. Therefore, if the screw 43 of the injection unit 4B is rotated, the molten raw material Rm always moves in the direction of the mold 7.

 Thus, if the screw 43 of the injection unit 4B is rotated a certain number of times, a certain amount of the molten raw material Rm is necessarily stored at the tip of the cylinder 41 of the injection unit 4B.

 In this process, the screw 43 itself moves (retreats) to the rear side of the cylinder 41.

 Next, the injection unit 4B is advanced in the direction of the mold 7 to make contact with the resin injection port (nozzle setting part) of the mold 207 (nozzle setting process).

 Thereafter, the screw 43 is extruded in the direction of the fixed mold 7a using the screw rotating / extruding means 44B. As a result, the molten raw material Rm stored at the tip of the cylinder 41 is injected into the mold 7 that has been clamped (injection step).

 Even after the molten raw material Rm is injected into the mold 7, the injection pressure is maintained until the molten raw material Rm injected into the mold 7 has a certain hardness. ). The molten raw material R m injected into the mold 7 is indirectly cooled and solidified by the cooling water passing through the mold 7. During the cooling process, all of the injection unit 4B is stopped except for the rotation of the screw 243 (cooling process). On the other hand, the supply of the powder of the release agent from the degassing hopper 8 into the cylinder 43 is continued even during the cooling process.

 In parallel with this cooling step, melting and metering of the raw material R are performed simultaneously.

 That is, the raw material R used in the next injection step is supplied from the raw material storage hopper 2 into the cylinder 41 by the rotation of the screw 43.

The raw material R, which does not contain the release agent powder, supplied into the cylinder 41 moves in the cylinder 41 in the direction of the fixed mold 7a as the screw 43 rotates. The raw material R, which does not contain the release agent powder, is melted by the heat of the steel 42 while moving in the cylinder 41 in the direction of the fixed mold 7a. Rm is stored in the tip of the cylinder 41.

 At this time, the screw 43 itself starts retreating by the transfer force (extrusion force) generated in the melting source material R by the rotation of the screw 43.

 Therefore, if the retreat distance of the screw 43 is limited, the amount of the molten raw material R m stored in the cylinder 43 and at the tip of the cylinder 43 is adjusted to an amount corresponding to the capacity to be injected next. (Process of melting and measuring raw materials).

 Next, after the molten raw material R m injected into the mold 207 is sufficiently cooled and has a desired shape in the mold 207, the movable mold 207b is moved to move the mold. Open the mold 07 (mold opening process), and remove the resin molded product p molded in the mold 207 from the ejector 107c or, in some cases, an automatic machine with a gripper that grasps the resin molded product. It is taken out to the target location using a take-out robot means (not shown) or the like (resin molded product protruding process).

In the resin molding product manufacturing apparatus 1B, as with the conventional injection molding apparatus 101B, the molten mold release agent (not shown) is used regardless of the screw 144 and the melting material Rm. )) Causes the screw 144 to run idle, preventing the phenomenon that it becomes impossible to store a predetermined amount of the molten raw material R m in the tip of the cylinder 141. A fixed amount of the molten raw material Rm is always stored at the tip of the cylinder 41 of B. For this reason, when the molten material Rm is injected into the mold 7, a phenomenon does not occur when the amount of the material Rm in the mold 7 is insufficient. As a result, the resin molded product P to be manufactured does not become a defective product having chips or voids, so that the production efficiency of the resin molded product P is remarkably improved as compared with a conventional resin molded product manufacturing apparatus. You. Also, instead of storing the release agent powder in the raw material storage hopper 2, the tip c of the injection unit 4 B where the connection c 1 with the raw material storage hopper 2 and the fixed mold 7 a are connected c A deaeration hopper 8 connected between the hopper 2 and the mold release agent powder is supplied, which is mixed with the positive pressure pulsating air wave, dispersed and pneumatically transported. Thus, the supply amount of the release agent powder to the cylinder can be changed only by changing the conditions of the positive pressure pulsating air wave for pneumatically transporting the release agent powder.

 Therefore, if the worker notices during the injection molding operation that a pattern like oil dripping is being formed on the surface of the resin molded product p to be manufactured, the process proceeds while manufacturing the resin molded product p. By changing the conditions of the positive pressure pulsating air wave, which pneumatically transports the powder of the mold release agent, the mixing ratio of the mold release agent can be changed so as to be appropriate.

 This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

 In addition, in the resin molding product manufacturing apparatus 1B, an elastic film having holes (slit holes in this example) 17a is used as the quantitative feeder 40, more specifically, the elastic film 17 ing.

 If the frequency, amplitude and waveform of the positive pressure pulsating air wave supplied into the pipe (transportation pipe) T3 are kept constant, the elastic membrane constituting the elastic membrane 17 will be A certain amount of the powder of the release agent is discharged from the mosquito (in this example, the slit hole) 17a into the mixing chamber 20 by vibrating up and down at a constant rate with the peripheral portion as a node.

 Further, the powder of the release agent discharged into the mixing chamber 20 is mixed with the pulsating air wave of positive pressure in the mixing chamber 20 and dispersed therein, and is dispersed into the pipe (transport pipe) T4. The air is discharged together with the pulsating air wave, and is pneumatically transported to the deaerated popper 18 via the Nishimachi (transportation pipe) T4.

Pneumatic transport in the deaerated popper 18 mixed with the pulsating air wave of positive pressure and dispersed The release agent powder that has been deaerated is supplied to the cylinder 41 after being deaerated by the deaeration popper 8.

 In this device 1B, since the positive pressure pulsating air wave is supplied to the pipe (transportation pipe) T4, the release agent powder is mixed with the positive pressure pulsating air wave and dispersed. And is transported to the degassing popper 8 by pneumatics.

 This makes it possible to deposit powder of the release agent on the inner wall surface of the pipe (transportation pipe) T4, as in the case where air of a constant pressure flow is flowed into the pipe (transportation pipe) T4, ) No blow-through phenomenon occurs in the release agent powder in T4.

 Therefore, the release agent powder mixed and dispersed in the positive pressure pulsating air wave has the same concentration as that at the time when the release agent powder is mixed and dispersed in the positive pressure pulsation air wave, As a result of being pneumatically transported to the deaeration popper 8, the powder of the release agent having the desired concentration can be stably supplied continuously into the cylinder.

 As a result, a constant amount of release agent powder can always be supplied from the discharge port 8a of the deaeration popper 8 into the cylinder 41, so that the cylinder 4 can be supplied from the discharge port 8a of the deaeration popper 8. The supply amount of the powder of the release agent into 1 can always be maintained at an optimum constant amount.

 As a result, during the production of the resin molded product p, the supply amount of the release agent powder into the cylinder 41 decreases, and the molten material Rm is formed on the surface of the mold 7 (the mold surface). On the contrary, the supply amount of the release agent powder into the cylinder 41 increases, and the release agent drips onto the surface of the mold 7 (gun surface). This does not cause the liquid dripping phenomenon to form a pattern such as oil dripping on the surface of the resin molded product p to be produced.

Also, instead of storing the powder of the release agent in the raw material storage hopper 2, the extruder 4A has a connection c1 to the raw material storage hopper 2 and a tip c2 to which the die 3 is connected. The deaeration hopper 8 connected between the hopper and the pulsating airwave is supplied with a releasing agent powder which is mixed and dispersed in a positive pressure pulsating air wave and transported pneumatically.

 Thus, the supply amount of the release agent powder to the cylinder 41 of the extruder 1A can be changed only by changing the condition of the positive pressure pulsating air wave that pneumatically transports the release agent powder. .

 Therefore, for example, if the worker notices during the injection molding operation that a pattern like oil dripping is being formed on the surface of the resin molded product p to be manufactured, the resin molded product P is manufactured. Change the conditions of the positive pressure pulsating air wave, which pneumatically transports the powder of the release agent, while adjusting the flow rate adjusting means 15 B with the control device IS (computing processor) 14 A, By reducing the amount of compressed air generated by driving the air source 15 A to the pulsating air-to-air wave converter 15 C, etc.), the mixing ratio of the release agent is changed to be appropriate be able to.

 Conversely, for example, the worker noticed that the molten raw material Rm injected into the mold 7 appeared to stick to the surface (the mold surface) of the mold 7. In such a case, while producing the resin molded product p, pneumatically transport the powder of the release agent, and change the conditions of the pulsating air wave of positive pressure. By adjusting the means 15B and increasing the supply of compressed air generated by driving the air source 15A to the pulsating air wave converter 15C, etc.) The ratio can be changed to make it appropriate.

 This eliminates the need to wastefully dispose of the raw material R, as was the case when using a conventional apparatus for manufacturing tree-shaped products.

Further, in the resin molded article manufacturing apparatus 1B, similarly to the resin molded article manufacturing apparatus 1A, a high pressure pulsation is provided at a position below the mixing chamber 20 as a mixing chamber 20 provided below the elastic film 17. The pulsating air wave inlet 20a connected to the air wave generator 15 is connected to the mixing chamber 20 Are provided substantially in the tangential direction. As a result, the positive pressure pulsating air wave that has entered the mixing chamber 20 through the pulsating air wave introduction port 20a turns in the mixing chamber 20.

 The elastic film 17 is vibrated by the pulsating air wave of positive pressure supplied into the mixing chamber 20, so that the holes provided in the elastic film 17 (slip holes in this example) 17 The powder of the release agent that has fallen into the mixing chamber 20 through a is entrained in the positive pressure pulsating air wave that is swirling in the mixing chamber 20, thereby releasing the mold. Among the powders of the agent, those having a large particle size are crushed until they reach a predetermined particle size.

 Also, in the resin molded product manufacturing apparatus 1B, as the mixing chamber 20 provided below the elastic film 17, a discharge port 20 b is provided above the mixing chamber 20, and the mixing chamber 20 is generally provided. It is provided in the tangential direction.

 Thereby, the pulsating air wave of positive pressure, which swirls in the mixing chamber, is provided at a position above the mixing chamber 20 from the pulsating air wave inlet 20 a provided at the lower position of the mixing chamber 20. A swirl flows from the bottom to the top toward outlet 2 Ob. As a result, a particle-sizing function similar to that of a cyclone occurs in the mixing chamber 20, so that the powder of the large release agent swirls at a lower position in the mixing chamber 20 and crushes to a predetermined particle size. Then move into outlet 20b.

 Thus, large release agent powder is not supplied from the degassing hopper 8 into the cylinder 41 of the injection unit 4B.

 As a result, the part having a large amount of the release agent relative to the amount of the molten material Rm may come into contact with the surface of the roller means 5a and / or the surface of the roller means 5b close to the die 3. Since it cannot be obtained, there is no formation of a pattern like oil dripping on the manufactured resin molded product.

Here, the description has been made mainly of the example in which the powder of the release agent is used as the powder of the solid additive. However, the powder of the solid additive is not limited to the powder of the release agent. It may be a blocking agent, an ultraviolet absorber, a stabilizer, a filling / reinforcing agent, a foaming agent, a flame retardant, an antistatic agent, a crosslinking agent, a stabilizer, a coloring agent, or the like.

 In this method for manufacturing resin S¾¾ products, a pneumatic transportation method using positive pressure pulsating air waves is used as a method for transporting the solid additive powder to a predetermined position in the cylinder. By varying the amount of the powder of the solid additive to be added to the constituent resin, the material properties of the resin molded article can be varied according to the purpose.

 In addition, in this method for producing a resin molded product, since a large amount of solid additive powder is not supplied into the cylinder, a portion of the cylinder in which the amount of the solid additive is larger than the amount of the molten raw material is increased. It is not formed.

 As a result, in the method of manufacturing a resin molded product, quality unevenness does not occur in the manufactured resin molded product.

 In addition, when powders of various solid additives are used, an additive component that needs to be accurately fed in a minute amount into a resin raw material is stored in a solid additive storage tank, and the raw material is stored in a raw material storage hopper. Alternatively, the raw material resin and a solid additive other than the solid additive powder contained in the solid additive storage tank may be stored.

 Alternatively, only the raw material resin may be stored in the raw material storage hopper, and the solid additive powder may be stored in the solid additive storage tank.

 In addition, the raw material excluding the release agent powder may be stored in the raw material storage hopper, and the release agent powder may be stored in the solid additive storage tank.

 Furthermore, the number of solid additive storage tanks, degassing hoppers, quantitative feeders, and high-pressure pulsating air wave generation means is not limited to one set, but may be set as many as necessary according to the type of solid additive. It may be.

In Embodiment 2 of the present invention, a resin molded product manufacturing apparatus Although the description provided with the material storage chamber 31 and the mixing chamber 20 is only a preferable example, the outlet 16a of the solid additive storage tank 16 is directly connected to the Connected in the middle of the transport pipe, so that the bottom of the solid additive storage tank 16 is at the outlet 16a. An elastic membrane 17 having 17a is provided, a high-pressure pulsating air wave generating means 15 is connected to one end of the transport pipe, and a deaeration hopper 8 is connected to the other end of the transport pipe, and deaeration is performed. The present invention also includes an apparatus for manufacturing a resin molded product in which the discharge port of the hopper 8 is connected to a position C3 in the middle of a cylinder 41 constituting an injection unit 4B of an injection molding machine.

 Further, in Embodiment 2 of the present invention, as the resin molded product manufacturing apparatus 1B, the injection unit whose basic configuration has a screw has been described. However, this is merely an example, and the present invention is not limited thereto. It goes without saying that such a resin molded product manufacturing apparatus includes one having a plunger as a basic configuration of the injection unit.

 Further, in the embodiment of the invention described above, the description has been made mainly of an example in which the raw material R is stored in the raw material storage hopper 2 and the release agent is stored in the solid additive storage tank 16. Alternatively, the raw material R and the release agent may be stored in the raw material storage hopper 2, and the release agent may be stored in the solid additive storage tank 16. Industrial applicability

As described above in detail, in the method for manufacturing a resin molded product according to claim 1, resin raw materials other than the solid additive powder are stored, and a positive pressure pulsating air wave is supplied from the middle of the cylinder of the extruder. The solid additive powder, which has been pneumatically transported to a position near the cylinder in a dispersed and mixed state, is supplied into the cylinder. That is, in this method for producing a resin molded product, the solid additive powder is mixed with the positive pressure pulsating air wave and dispersed, and pneumatically transported to a predetermined position in the cylinder. As a result, the accumulation of powder on the inner wall surface of the transport pipe and the powder blow-through phenomenon in the transport pipe do not occur as in the case where air of a constant pressure flow is flowed into the transport pipe. Therefore, the solid additive powder mixed and dispersed in the positive pressure pulsating air wave has the same concentration as that at the time when the solid additive powder is mixed and dispersed in the positive pressure pulsating air wave, As a result of being pneumatically transported to a position near the cylinder, a solid additive powder having a desired concentration can be stably supplied continuously into the cylinder.

 In this method for producing a resin molded product, a pneumatic transportation method using a positive pressure pulsating air wave is employed as a method for transporting the solid additive powder to a predetermined position in the cylinder. Thereby, the amount of the powder of the solid additive to be added to the resin raw material can be extremely small.

 In addition, if the method of manufacturing this resin molded article is used, the material characteristics of the resin molded article can be varied according to the purpose by changing the amount of the solid additive powder added to the resin constituting the resin molded article in various ways. Can be changed.

 In the apparatus for manufacturing a resin molded product according to claim 2, a high-pressure pulsating air wave generating means connected to the other end of the transport pipe is driven to supply a positive-pressure pulsating air wave into the transport pipe. The elastic film provided at the outlet of the solid additive storage tank connected to the middle of the step is vibrated by the pulsating air wave of positive pressure.

 As a result, according to the amplitude, waveform, wavelength, frequency, etc. of the pulsating air wave of the positive pressure, a certain amount of the solid additive powder stored in the solid additive storage tank is determined by the pores of the elastic membrane. Is discharged into the transport pipe.

The powder of the solid additive discharged into the transport pipe is immediately mixed with the positive pressure pulsating air wave supplied into the transport pipe and dispersed. Then, it is mixed with the pulsating air wave of positive pressure and dispersed, and is pneumatically transported to the deaeration hopper connected to one end of the transport pipe. Thus, in this apparatus, a positive pressure pulsating air wave is used as a medium for transporting the powder of the solid additive through the transport pipe to one end of the transport pipe, instead of using the air at a constant pressure. As a result, in this apparatus, the adhesion and deposition of powder on the inner wall surface of the transport pipe and the phenomenon of powder blow-through in the transport pipe do not generally occur when steady pressure air is supplied into the transport pipe.

 Therefore, the powder of the solid additive discharged into the transport pipe from the hole of the elastic membrane is pneumatically transported to the degassing hopper at the concentration at the time when the powder is discharged into the transport pipe. The solid additive powder mixed with a positive pressure pulsating air wave and dispersed and pneumatically transported into the degassing hopper, after degassing, passes through the discharge port of the degassing hopper and into the middle of the extruder cylinder. From the position, it is fed into the cylinder.

 Therefore, if this device is used, a desired amount of the solid additive powder can be stably and quantitatively supplied into the cylinder from a position in the middle of the cylinder of the extruder.

 This apparatus for producing a resin molded product can be used for various methods for producing a resin molded product.

In the method for manufacturing a resin molded product according to claim 3, the resin raw material excluding the solid additive powder is stored and mixed with a positive pressure pulsating air wave from the middle of the cylinder of the injection unit of the injection molding. The solid additive powder, which has been pneumatically transported to a position near the cylinder in a dispersed state, is supplied into the cylinder. In other words, in this method for producing a resin molded product, the solid additive powder is mixed with the positive pressure pulsating air wave and dispersed, and is pneumatically transported to a predetermined position of the cylinder. There is no accumulation of powder on the inner wall surface of the transport pipe or the phenomenon of powder blow-through in the transport pipe, which occurs when air with a constant pressure flows through the transport pipe. Therefore, the solid additive powder mixed and dispersed in the positive pressure pulsating air wave has a concentration and dispersion at the time when the solid additive powder is mixed and dispersed in the positive pressure pulsating air wave. As a result of being pneumatically transported to the position near the cylinder at the same concentration, the solid additive powder of the desired concentration can be stably supplied continuously into the cylinder.

 Further, in this method for producing a resin molded product, a pneumatic transportation method is employed as a method for transporting the solid additive powder to a predetermined position in the cylinder. By using this method of manufacturing a resin molded product, the amount of powder of the solid additive to be added to the resin constituting the resin molded product can be variously changed to achieve the material characteristics of the resin molded product. Various changes can be made accordingly.

 In the apparatus for manufacturing a resin molded product according to claim 4, a high-pressure pulsating air wave generating means connected to the other end of the transport pipe is driven to supply a positive pressure pulsating air wave into the transport pipe. I have to.

 A positive pressure pulsating air wave is supplied into the transport pipe, and the elastic membrane provided at the outlet of the solid addition storage tank connected to a position in the middle of the transport pipe is vibrated by the positive pressure pulsating air wave. ing.

 As a result, a certain amount of the powder of the solid additive stored in the solid additive storage tank according to the amplitude, waveform, wavelength, frequency, and the like of the pulsating air wave of the positive pressure is converted into an elastic film. Is discharged into the transport pipe from the hole.

 The powder of the solid additive discharged into the transport pipe is immediately mixed with the positive pressure pulsating air wave supplied into the transport pipe and dispersed. Then, it is mixed with the pulsating air wave of positive pressure and dispersed, and pneumatically transported to the deaeration hopper connected to one end of the transport pipe.

Therefore, the powder of the solid additive discharged into the transport pipe from the hole of the elastic membrane is pneumatically transported to the degassing hopper at the concentration at the time when the powder is discharged into the transport pipe. The solid additive powder mixed with a positive pressure pulsating air wave into the degassing hopper and pneumatically transported in a dispersed state is degassed and then discharged from the degassing hopper through the extruder cylinder. The oil is fed into the cylinder from the middle position of —.

 Therefore, if this device is used, a desired amount of the solid additive powder can be stably and quantitatively supplied into the cylinder from a position in the middle of the cylinder of the extruder.

 In the method for producing a resin molded product according to the fifth aspect, when mixing and dispersing the powder of the solid additive, a pulsating air wave having a swirling flow and a positive pressure is used. As a result, the powder having a large particle diameter in the powder of the solid agent additive is crushed to a predetermined particle diameter by the swirling flow of the positive pressure pulsating air wave. No additive powder is fed into the cylinder.

 As a result, in the method of manufacturing a resin molded product, quality unevenness does not occur in the manufactured resin molded product.

 In the method for producing a resin molded product according to claim 6, a powder of the release agent is used as the powder of the solid additive, and the powder of the release agent is stored in the raw material storage hopper; The powder is mixed with a positive pressure pulsating air wave, dispersed, pneumatically transported to a position near the cylinder, degassed, and then supplied into the cylinder from a position in the middle of the cylinder.

 Thus, for example, when this method is applied to the extrusion molding method, the distance between the position where the raw material storage hopper is connected and the position where the release agent powder is supplied is located in the cylinder of the extruder. Does not contain any release agent. Therefore, during this time, the screw cannot run idle due to the release agent, and if the screw of the extruder is rotated, the molten material always moves in the die direction.

Also, in the cylinder where the release agent powder is supplied, the raw material supplied into the cylinder is already in a molten state. By the way, the coefficient of friction acting between the molten material and the cylinder and between the filler and the screw is extremely large. For this reason, in the cylinder, at the tip side from the place where the release agent powder was supplied, Also, the molten release agent does not act as a slip agent for cylinders and screws.

 For this reason, even if the release agent powder is supplied in the cylinder, even at the tip end side, the screw cannot run idle due to the release agent, so that the screw of the extruder can be rotated. In this case, the molten material always moves in the die direction.

 As a result, if the screw of the extruder is rotated at a constant rotation speed, a certain amount of molten material is always extruded from the die. As a result, a resin molded product having a predetermined film thickness can be manufactured as long as the roller means provided downstream of the die is driven under certain conditions.

 That is, when this method for producing a resin molded product is applied to an extrusion molding method, a fixed amount of a molten material can be constantly extruded from a die, so that a roller means provided downstream of the die is required. As long as it is driven under certain conditions, the manufactured resin molded products will not be out of specification.

 Also, instead of storing the powder of the release agent in the raw material storage hopper, the raw material storage hopper, which is one of the cylinders constituting the extruder. The mold release agent powder that is mixed with and dispersed in positive pressure pulsating air waves and pneumatically transported is supplied from between the connection part and the tip end where the die is attached.

 Thus, the supply amount of the release agent powder to the cylinders constituting the extruder can be changed only by changing the conditions of the positive pressure pulsating air wave that pneumatically transports the release agent powder.

Therefore, if the worker notices during the extrusion molding process that a pattern like oil dripping is being formed on the surface of the resin molded product to be produced, the mold is released while the resin molded product is being produced. By changing the conditions of the positive pressure pulsating air wave that pneumatically transports the powder of the release agent, it is possible to change the compounding ratio of the release agent so as to be appropriate. This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

 Further, for example, when this method is applied to an injection molding method, in the method for producing a resin molded product, powder of a release agent is not stored in a raw material storage hopper. As a result, the mold release agent is not included in any part of the cylinder that constitutes the injection unit of the injection molding machine from the position where the raw material storage hub is connected to the location where the release agent powder is supplied. Not. Therefore, during this time, since the screw cannot run idle due to the release agent, if the screw is rotated, the molten raw material is always transferred to the tip of the cylinder.

 Also, in the cylinder where the release agent powder is supplied, the raw material supplied into the cylinder is already in a molten state. The coefficient of friction acting between the molten material and the cylinder and between the molten material and the screw is extremely large. Therefore, the molten release agent does not act as a slip agent on the cylinder or screw even on the tip side of the place where the powder of the release agent is supplied in the cylinder.

 For this reason, even if the screw is free to run idle due to the release agent even if it is closer to the tip than the place where the powder of the release agent is supplied in the cylinder, if the screw is rotated, it will melt. The raw material always moves to the tip inside the cylinder. At the same time, in the injection molding machine, when the screw is rotated to feed the molten material to the tip of the cylinder, the screw itself moves to the rear of the cylinder. Therefore, if the screw of the injection unit of the injection molding machine is rotated a certain number of times and the amount of movement of the screw to the rear of the cylinder is regulated to a certain amount, a certain amount of molten raw material will always be at the tip of the cylinder. Can be stored.

As a result, in this method of manufacturing a molded product, the screw is connected to the tip of the cylinder. When the molten material is injected into the mold connected to the tip of the cylinder, the optimal amount of molten material can be injected into the mold without any excess or shortage.

 As a result, in the method for producing a resin molded product, for example, the molten raw material injected into the mold is insufficient, and chipping and voids are not generated in the tree molded product formed in the mold. That is, when the method for producing a resin molded product is applied to the injection molding method, the optimum amount of the solvent can always be stably injected into the mold. Molded products will not be out of specification.

 For this reason, the manufacturing efficiency of the resin molded article is significantly improved in the method of manufacturing the resin molded article as compared with the conventional injection molding method.

 Also, instead of storing the powder of the release agent in the raw material storage hopper, the cylinder that constitutes the injection unit of the injection molding machine has a connection between the raw material storage hopper and the tip where the mold is connected. During this period, powder of the release agent mixed with the positive pressure pulsating air wave and dispersed and pneumatically transported is supplied.

 As a result, the supply amount of the powder of the release agent to the cylinder constituting the injection unit of the injection molding machine can be changed only by changing the condition of the positive pressure pulsating air wave that pneumatically transports the powder of the release agent. Can be changed.

 Therefore, if the worker notices during the injection molding operation that a pattern such as oil dripping is being formed on the surface of the resin molded product to be manufactured, the operator will continue to manufacture the resin molded product. By changing the conditions of positive pressure pulsating air waves that pneumatically transport the release agent powder, the mixing ratio of the release agent can be changed so as to be appropriate.

 This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

In the method for manufacturing a resin molded product according to claim 7, the mixing chamber provided below the elastic film is connected to the high-pressure pulsating air wave generating means at a position below the mixing chamber. A dynamic air wave inlet is provided approximately tangential to the mixing chamber.

 With this configuration, in the resin molded product manufacturing apparatus, the positive pressure pulsating air wave that enters the mixing chamber from the pulsating air wave introduction port turns in the mixing chamber.

 When the elastic membrane is vibrated by the pulsating air wave of positive pressure supplied into the mixing chamber, the powder of the solid additive is discharged into the mixing chamber through the holes provided in the elastic membrane. The powder of the solid additive discharged into the mixing chamber is entrained in a pulsating air wave of positive pressure swirling in the mixing chamber, whereby the powder of the solid additive having a large particle size is obtained. Will be crushed to a predetermined particle size.

 In the apparatus for manufacturing a resin molded product, the discharge port is provided at a position above the mixing chamber provided below the elastic film in a direction substantially tangential to the mixing chamber.

 As a result, pulsating air waves of positive pressure, which swirl in the mixing chamber, flow from the pulsating air wave inlet provided at the lower position of the mixing chamber to the discharge port provided at the upper position of the mixing chamber from below. The swirl flows upward. As a result, since the same sizing function as a cyclone is generated in the mixing chamber, the powder of the large solid additive swirls around the lower position in the mixing chamber, is crushed to a predetermined particle size, and then is discharged into the discharge port. Move to.

 As a result, a large amount of the solid additive powder is not supplied into the cylinder from the degassing hopper.

 As a result, in the method for producing a resin product, there is no quality unevenness in the resin molded product to be produced.

 In the method for producing a resin molded product according to claim 8, powder of the release agent is used as the powder of the solid additive.

With this, when the resin molding product manufacturing apparatus is used as an extrusion molding apparatus, a fixed amount of molten raw material can always be stably extruded from the die. As long as it is driven under certain conditions, The molded resin product does not become a nonstandard defective product.

 For this reason, the use of the apparatus for manufacturing a resin molded product reduces the frequency of occurrence of defective products as compared with a conventional extruder, thereby significantly improving the production efficiency of the resin molded product. In addition, for example, when this apparatus is used as an injection molding apparatus, since an optimal amount of molten material can always be stably injected into a mold, a resin molded product manufactured in the mold However, it does not become a nonstandard defective product.

 For this reason, the use of the resin molded product manufacturing apparatus reduces the frequency of occurrence of defective products as compared with the conventional injection molding apparatus, so that the production efficiency of the resin molded article is significantly improved. Furthermore, when the resin molding product manufacturing apparatus is used, if an operator notices that a pattern of oil dripping is being formed on the surface of the resin molding product to be manufactured, the resin molding product By changing the conditions of the positive pressure pulsating airwaves that pneumatically transports the release agent powder while manufacturing the mold release agent, it is possible to change the mixing ratio of the mold release 剂 to be appropriate.

 This eliminates the need to wastefully dispose of the resin raw material by using the method for producing a resin molded product.

Claims

The scope of the claims  1. By rotating the screw provided in the cylinder of the extruder, the raw material stored in the raw material storage hopper is supplied into the cylinder, melted in the cylinder, and the screw is rotated. With the extrusion pressure generated by this, the fusible source material formed in the cylinder is continuously extruded from a die connected to the tip of the cylinder to continuously produce a resin molded product. A method for producing a resin molded product, comprising:  In the raw material storage hopper, raw materials other than the powder of the solid additive are stored, and from a position in the middle of the cylinder one, mixed into a pulsating air wave of positive pressure and sent to the cylinder in a dispersed state. A method for producing a resin molded product, wherein the supplied solid additive powder is degassed before being supplied.  2. The die is connected to the tip, and the cylinder of the extruder to which the raw material storage hopper is connected is located at the rear of the cylinder. Attach the outlet of the deaeration hopper to  Connect one end of the transport pipe to the deaeration hopper,  A high-pressure pulsating air wave generating means is connected to the other end of the transport pipe,  Connect the outlet of the solid additive storage tank to a position in the middle of the transport pipe,  A resin molded article having an elastic membrane having holes at an outlet of the solid additive storage tank. 3. By rotating a screw or plunger provided in one cylinder of the injection molding machine, the raw material stored in the raw material storage hopper is supplied into the cylinder, melted in the cylinder, and melted in the cylinder. A predetermined amount of the molten raw material formed in the cylinder is stored at the tip of the cylinder, and stored at the tip of the cylinder. By moving the screw or plunger forward of the obtained predetermined amount of the molten raw material toward the distal end of the cylinder, a predetermined amount of the molten raw material stored in the distal end portion of the cylinder is removed from the cylinder. A method for manufacturing a resin molded product, comprising: injecting into a mold connected to the tip of the resin molded product to produce a resin molded product in the mold.  The raw material except the powder of the solid additive is stored in the raw material storage hopper, and the solid additive mixed with a positive pressure pulsating air wave and dispersed in the cylinder from a position in the middle of the cylinder. A method of manufacturing a resin molded product in which powder is supplied after degassing.  4. At the tip, a mold is connectable, and at the back, between the tip of the cylinder of the injection molding machine to which the raw material storage hopper is connected and the connection part of the raw material storage hopper. Attach the outlet of the deaeration hopper to the specified position of  Connect one end of the transport pipe to the deaeration hopper,  A high-pressure pulsating air wave generating means is connected to the other end of the transport pipe,  Connect the outlet of the solid additive storage tank to a position in the middle of the transport pipe,  An apparatus for manufacturing a resin molded product, wherein an elastic film having holes is provided at an outlet of the solid additive storage tank.  5. A positive pressure pulsating air wave that mixes and disperses the powder of the solid additive and pneumatically transports the swirling flow when mixing and dispersing the powder of the solid additive. 4. The method for producing a resin molded product according to claim 1 or claim 3.  6. The method for producing a resin molded article according to any one of claims 1, 3 and 5, wherein the powder of the solid additive is a powder of a mold release.  7. A mixing chamber is further provided below the elastic film,  In the mixing chamber, A pulsating air wave guide connected to the high-pressure pulsating air wave generating means at a position below the pulsating air wave generating means; An inlet is provided in a substantially tangential direction of the mixing chamber, and an upper port is connected to the fl convertible hopper, and an outlet is provided in a substantially tangential direction of the mixing chamber. Production of the resin molded product according to claim 2 or claim 4. 8. The apparatus for producing a resin molded product according to claim 2, wherein the powder of the solid additive is a powder of a release agent.