JPH0463680A - Continuous blast treating device - Google Patents

Abstract

PURPOSE:To remarkably improve blast treatment efficiency by supporting a blast nozzle with a support member extended from the end section of a rotary cage. CONSTITUTION:A blast nozzle 20 is arranged in a rotary cage 4 with a support member 21 extended from the end section of the rotary cage 4. No interrupting object exists between the blast nozzle and a work, and more efficient blast treatment is applied to the work in the rotary cage 4.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a device that can perform continuous blasting such as removing pars generated during molding of resin molded products or light metal molded products without interrupting the operation of the device.

[Conventional technology]

Due to the gaps that inevitably occur at the joints of molds,
Flange-like cracks occur around resin molded products or light metal molded products such as aluminum die-casting. This kind of debris is unnecessary for the molded product, and whether it is necessary to remove it or not.It is very time-consuming to remove the debris manually, and it is also difficult to remove the debris that has formed in the holes of small molded products. It is virtually impossible to remove it manually. Therefore, in recent years, blasting has been applied to deburring such molded products. Blasting is a process in which an abrasive material made of a suitable material and having a suitable particle size is blown onto the target object using a high-speed air stream ejected from a blast nozzle. The particles are scraped off by impacting the surface of the object with an abrasive at high speed. Even if a burr is formed in the hole of the object, the abrasive material can easily penetrate into the hole and scrape off the burr formed there. The abrasive material and its particle size are appropriately selected depending on the object to be blasted. For example, when the object is a resin molded product, the material of the abrasive material is selected to be resin particles, and the abrasive material is removed so as not to damage the surface of the molded product. However, when the surface treatment of a molded product is to intentionally form a satin finish, for example, a material with sufficient hardness to form a satin finish is selected. When deburring is performed using blasting as described above, at the beginning, the traditional blasting method is applied to rotate the barrel containing the object to be deburred. A device was used with a blast nozzle facing the opening of the barrel. However, in such barrel-type blasting equipment, it is necessary to put the molded product into the barrel and take out the molded product from the barrel after the blasting process is finished, which requires manpower and effort. , and during resetting, the blasting process has to be stopped, which poses a problem in terms of efficiency.For example, in the case of deburring of electronic parts as molded products, there is a problem that it can no longer be applied to the production line of electronic parts. Ta. In order to solve this problem, the applicant of the present invention has proposed an apparatus disclosed in Japanese Utility Model Publication No. 1-44304 as an apparatus for continuously deburring the molded article by blasting. The blasting device disclosed in the above-mentioned publication has a rotating cylinder that is driven to rotate around a horizontal axis and is arranged so as to pass through the blasting chamber laterally, and a spiral feeding guide is provided on the inner peripheral surface of the rotating cylinder. The molded product fed into the inlet of the rotary tube is stirred as the rotary tube rotates and is continuously sent to the outlet by the spiral feed guide, while the abrasive material is directed toward the rotary tube. It adopts a configuration with a blast nozzle that sprays water. According to the above configuration, the deburring action by the abrasive material projected from the blast nozzle can be continuously performed while the molded product introduced from the inlet of the rotating cylinder reaches the outlet without stopping the apparatus. This dramatically improves the efficiency of deburring processing.

[Problem to be solved by the invention]

However, in the configuration shown in the above-mentioned Japanese Utility Model Publication No. 1-44304, since the blast nozzle is arranged outside the rotating cylinder, the following problems exist. First, not all of the abrasive material injected from the blast nozzle reaches the molded product in the rotating cage, and a considerable portion of it hits the mesh that forms the outer periphery of the rotating barrel and does not perform the blasting action. Blasting efficiency decreases accordingly,
In addition, the flow velocity of the air mixed with the abrasive jetted from the nozzle is slowed down by resistance as it passes through the mesh of the rotating tube.
This also reduces blasting efficiency. Second, since the highest-speed abrasive material immediately after being injected from the blast nozzle directly hits the rotating cylinder, the mesh that forms the outer periphery of the rotating cylinder is severely worn out, and its lifespan is short. Therefore, the present invention solves the above-mentioned problems of the blast processing apparatus disclosed in the above-mentioned Japanese Utility Model Publication No. 1-44304, and is configured to further increase the blasting efficiency and extend the life of the rotating cylinder. The object of the present invention is to provide a continuous blast processing apparatus that provides a continuous blasting process.

[Means to solve the problem]

In order to solve the above problems, the present invention takes the following technical measures. That is, the continuous blasting apparatus according to claim 1 of the present application,
a main body container having a blast chamber formed therein; a rotary cylinder supported rotatably around a horizontal axis within the main body container, and having a spiral feed guide provided on its inner surface and open at both ends; and a blast nozzle that is disposed inside the rotary tube and injects air mixed with abrasive material, and the blast nozzle is supported by a support member extending from an end of the rotary tube. shall be. Further, in the continuous blast processing apparatus according to claim 2 of the present application, in the continuous blast processing apparatus according to claim 1, the support member that supports the blast nozzle is a pipe that supplies air or air mixed with an abrasive to the blast nozzle. It is characterized by being composed of roads.

[Action and effect]

The object to be blasted, such as a molded product, placed into the inlet of the rotary rotor rotating in the blasting chamber is continuously fed to the outlet by a spiral feed guide while being stirred, and is discharged. The object is then subjected to a blasting process using the abrasive material injected from the blast nozzle while being sent through the rotating cage in the direction of its axis as described above. In the present invention, although the blast nozzle is arranged inside the rotatable body by means of a support member extending from the end of the rotatable body, there is nothing obstructing between the blast nozzle and the object. , objects in the rotating cage will receive a more efficient blasting process. That is, compared to the conventional case in which the blast nozzle is disposed outside the rotary power, all of the abrasive material injected from the blast nozzle contributes to the blasting process. Also,
The flow rate of the abrasive-laden air as it passes through the rotatable mesh is reduced, and this does not reduce the efficiency of the blasting process. Furthermore, since the high-speed abrasive material immediately after being jetted from the blast nozzle does not collide with the rotary net, wear and tear on the rotary force is kept to a low level. As described above, according to the continuous blast processing apparatus of the present invention, the blast processing efficiency is significantly improved compared to the conventional method, and
The life of the rotary power that must continuously transport the molded product while stirring it is also significantly extended. The continuous blast processing apparatus according to claim 2 of the present application includes a support member for supporting a blast nozzle to be disposed in a rotary basket, and a predetermined abrasive supply device or air supply device to which air or abrasive mixture is supplied to the blast nozzle. It also serves as a separate pipe for supplying air. Therefore, the number of parts is reduced, which leads to cost reduction, and the inside of the rotary unit is not narrowed by support members, hoses for conveying air or abrasive material, etc., and the rotary unit can be formed compactly. At the same time, it is possible to maintain a high level of blast processing ability.

[Explanation of Examples]

Embodiments of the present invention will be specifically described below with reference to the drawings. As shown in FIG. 1, the continuous blast processing apparatus l for molded products of the present invention performs continuous blast processing on objects in a blast chamber 3 inside a main container 2 surrounded by partition walls on all sides. It looks like this. Inside the blast chamber 3, a cylindrical cage 4 whose center axis is oriented horizontally is rotatably supported. In this example, the basket 4 is made of a mesh board or punched metal wound into a cylindrical shape, and flange members 5 are attached to both ends and the outer periphery of the intermediate retracted part.
It is formed by fitting and fixing parts a, 5b, and 5c. The cage 4 has the outer periphery of the flange members 5a and 5b,
Each pair of rollers 8 is pivotally supported on the partition wall 6.7 of the main container 2.
, 9 and is rotatably supported. A support shaft 10 supporting the rollers 8 and 9 is provided.
．． At the outer ends of each sprocket 11. A drive chino 14 is rotated between a sprocket 13 attached to the output shaft of the drive motor 12 and each of the sprockets 11, 11. Drive motor 12
When activated, the rollers 8.8 are driven to rotate via the driving chain 14, and the cage 4, which is removably mounted on the rollers 8, 8, is therefore rotated. By rotatably supporting the basket 4 as described above, the inlet opening 15 and the outlet opening 16 can be sufficiently opened without the presence of a rotationally supporting member on its central axis. An object input chute 17 is attached to the entrance opening 15 of the basket 4 so as to pass through the partition wall 6 of the main container 2.
The inner end of is extended. Furthermore, a spiral feeding guide 18 is provided on the inner surface of the cage 4. The feed guide 18 can be formed, for example, by fixing one side edge of a band member of a predetermined width to the inner surface of the basket 4 in a spiral manner. In addition, feeding guide 1
The direction of the spiral 8 is set so that as the cage 4 rotates, the spiral moves from the entrance side to the exit side of the cage. Due to the above, while the basket 4 is rotating, the basket 4 is
The object introduced into the inlet opening 15 of the apparatus is continuously conveyed to the outlet opening 16 by the spiral feed guide 18 while being stirred, and is dropped from the outlet opening 16. The dropped object is discharged to the outside of the main container 2 via a discharge shoe 19 formed below the outlet opening 16. In the present invention, a blast nozzle 20 is disposed inside the basket 4 to directly perform blasting on the object being stirred within the basket 4. In this example, five blast nozzles 20 are inserted into both opposing partition walls 6 of the main container 2 so as to penetrate the inside of the rotary unit 4 in the axial direction.
, 7 via a support member 21 whose both ends are supported. This support member 21 has a tubular shape, and the above-mentioned blast nozzle 2 is attached to the tip of five rigid branch pipes 22 separated from this tubular support member 21.
0 is connected. Furthermore, the tubular support member 21
An air supply hose 24 for conveying low-pressure air sent from a low-pressure air supply source such as a Roots blower is connected via a swivel joint 23 to one end of the air supply hose 24 . That is,
In this example, there are five blast nozzles 2 inside the cage 4.
Support member 21 or branch pipe 22 that should support 0...
It also serves as a conduit for supplying air to the blast nozzle. Each blast nozzle 20 is connected to a branch pipe 22 as described above.
This is a known type that has the function of mixing the abrasive material supplied by the hose 25 with the low-pressure air flow supplied from the hose 25, and injecting the low-pressure high-speed air flow mixed with the abrasive material from the nozzle tip. be. In this example, the abrasive material is supplied to each blast nozzle 20 through the following route. That is, the abrasive material collected after the blasting process and accumulated at the bottom of the separation chamber 26 installed at the top of the main container 2 is -
Once the hoses 27a and 2 are connected to a pair of abrasive reservoirs 2728 fixed to the inner surface of the partition wall 6.7 in the upper part of the blast chamber 3,
8a etc., and each abrasive material reservoir 27
．． A predetermined number of abrasive supply hoses 25 are branched from 28.
... are introduced into the cage from the end of the cage 4 and connected to each of the blast nozzles 20. Furthermore, in this example, the above-mentioned blast nozzle 20.
In order to perform the blasting process more efficiently, the blast nozzle 20 is connected to the tubular support member 2.
It is structured so that it oscillates around 1. That is, the tubular support member 21 is rotatably supported with respect to the partition wall 67 of the main container 2 by a bearing (not shown), and is configured to be swing-driven by an external drive source. . Figures 1 and 2
As shown in the figure, a drive arm 29 is fixed to one end of the support member 2, and the proximal end of a connecting rod 30, one end of which is bolted to the drive arm 29, is connected to a motor 31. A rotating disk 3 attached to an output shaft 32 of
The bottle is joined at the eccentric position of 3. As a result, when the motor 31 rotates, reciprocating motion is applied to the tip of the connecting rod 30, and the support member 21 is transferred to the support member 21 through the five blast nozzles 20 via the drive arm 29. A rocking motion about the axis is given (
(See Figure 3). The abrasive material is injected together with high-speed air from the nozzles 20 and collected on the hopper 34 at the bottom of the blasting chamber 3 after the blasting process, and after large particles are removed by the paris collection device 35, A separation chamber 26 installed at the top of the main container 2 via a conveying pipe 36 connected to the lower part
Here, fine dust is removed and stored at the bottom of this separation chamber 26. In this way, the abrasive material
After performing the blasting action by spraying from the blast nozzle 20, the paris is recovered by the paris recovery device 35, and the separation chamber 2
After the dust is removed in step 6, the abrasive material is transported from the lower part of the separation chamber 26 to both abrasive reservoirs 27 and 28 to be prepared for blasting, and the cycle is repeated. The top of the separation chamber 26 is connected to a dust collector 38 attached to the main container 2 via an air conveying pipe 37. This dust collector 37 may be a known bag-type dust collector. Note that this dust collector 37 is naturally equipped with a blower (not shown) for generating suction force, and the suction force of this blower is used to transfer the abrasive material that has been collected at the bottom of the main body to the conveying pipe. 36 to the separation chamber 26, and guides the dust separated in the separation chamber 26 together with air to the dust collector 38 via the air conveying pipe 37. The above-mentioned paris recovery device 35 in this example is devised so that it can continuously recover the paris scraped off from resin or light metal molded products as objects to be blasted, without stopping the operation of the device. has been done. That is, in the paris recovery chamber 39 connected to the lower end of the lower hopper 34 of the blasting chamber 3, a cylindrical separation chamber 40 having a large number of small holes of a predetermined diameter is arranged so as to be rotatable around a horizontal axis. , an inlet chute 41 into this separation capacity 40
It is configured to continuously remove only particles larger than the diameter of the hole from the abrasive material mixed with particles introduced from the hole. A spiral feed guide 42 is provided on the inner periphery of the separation capacity 40 for guiding the pari remaining in the separation cage to the end of the separation capacity 40. After finishing the blasting action, the abrasive material including paris scraped off from the object is transferred from the feed chute 41 to the rotating separation capacity 40.
sent inside. This abrasive material, while being fed through the section by the feed guide 42, falls through a number of holes, leaving only the particles in the separation capacity 40. The paren remaining in the separation basket is dropped from the end of the separation capacity 40 into the paris receiver 43. A collection pipe 44 that communicates with the suction part of the dust collector 38 is connected to the collection pipe 42 of the dust collector, so that the dust dropped into the collection pipe 42 is fed to the dust collector through the collection pipe 44. The dust is automatically sucked into the collection pipe 44 by the negative pressure of 38 and collected by the dust collector 38 . Note that the path of the abrasive material passing through the pari recovery device 35 is as already explained. Next, the operation of the entire apparatus of this embodiment will be explained. When the device is started, the dust collector 38 blower, the Ruth blower for supplying low pressure air to the blast nozzle 20, and the basket 4
A drive motor 12 for rotating the blast nozzle 2
The motor 31 for swinging the 0 and the motor for rotating the separation capacity 40 of the paris recovery device are started. Low-pressure, large-flow air is supplied to each blast nozzle 20 through a tubular support member 21 or a branch pipe 22. Inside the blast nozzle, the abrasive material supplied to the blast nozzle via the hose 25 is mixed into the above-mentioned low-pressure, high-flow air flow due to the negative pressure generated in the venturi section of the blast nozzle, and as a result, each blast nozzle 20. From the tip, low-pressure, large-flow air mixed with a moderate amount of abrasive material is injected at high speed. Moreover, each blast nozzle 20... has a tubular support member 2
It is oscillated around 1. On the other hand, when objects such as molded products to be blasted are continuously introduced from the input soyute 17, the objects are sent to the outlet side by the feed guide 18 while being stirred inside the rotating basket 4. It will be done. During this time, the object is directly blasted by the abrasive material sprayed from the five swinging blast nozzles 20 as described above, and unnecessary particles are efficiently removed. The object from which the firmness has been removed is dropped downward from the outlet opening 16 of the basket 4 and is discharged from the discharge chute 19 to the outside of the blasting chamber. The abrasive material that has been blasted contains pars scraped off from the object, and this pars is continuously collected by a pars recovery device 35 disposed in a pars recovery chamber at the bottom of the blasting chamber 3. Ru. The abrasive material from which the dust has been removed is conveyed to the separation chamber 26 by the conveying pipe 36)2, where fine dust is removed. Then the paris and dust removed abrasives are again
The abrasive material is allowed to fall by gravity into the abrasive reservoirs 27 and 28 in preparation for the next blasting process. The dust removed by the separation chamber 26 is transferred to the air conveying pipe 37
The dust is transported to the dust collector 38 via the dust collector 38, where it is collected and disposed of without being dispersed into the atmosphere. In this way, the continuous blasting apparatus of the present invention performs continuous blasting on the object, and also
Since the object is blasted directly by the abrasive material sprayed from the blast nozzle, the blasting efficiency is increased accordingly. In addition, unlike conventional structures, the molded product does not receive the abrasive material from the blast nozzle placed outside the cage, so the airflow mixed with the abrasive material sprayed from the blast nozzle is There is no deceleration while passing through the net, and this also maintains a high level of blasting efficiency. Furthermore, since the abrasive material immediately after being sprayed from the blast nozzle does not hit the cage net, the life of the rotating cage is dramatically extended compared to the conventional method. Of course, the scope of the invention is not limited to the examples. For example, in the embodiment, the blast nozzle type is one in which the abrasive material is mixed into the air flow within the nozzle, or the abrasive material is mixed in the air flow before it reaches the nozzle. You may also adopt the format. In this way, the structure for supporting the blast nozzle within the cylinder becomes simpler. That is, in the embodiment, it was necessary to arrange an abrasive material hose in the cylinder that supplies the abrasive material from the abrasive material reservoir to each blast nozzle, but as described above, the air flow containing the abrasive material was If the abrasive material hose 25 in the embodiment is configured to be supplied to each blast nozzle from a tubular support member or a branch pipe, the abrasive material hose 25 in the embodiment can be omitted. Further, in the embodiment, whether the support member supports five blast nozzles or the number of blast nozzles supported by the support member does not matter. Furthermore, the purpose of the blasting treatment is not limited to the removal of flakes from molded products as suggested in the examples, but also includes forming the base of the material, forming a satin finish, and the like.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing the overall configuration of an embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 1... Continuous deburring device, 2... Main container, 3...
- Blast chamber, 4... Rotating basket, 18... Feeding guide, 20... Blast nozzle, 21... Support member.

Claims (2)

[Claims] (1) A main container with a blast chamber formed inside, and a rotary cage that is rotatably supported within the main container around a horizontal axis, has a spiral feeding guide on its inner surface, and is open at both ends. and placed inside the rotating cage,
a blast nozzle that injects air mixed with abrasive material, and the blast nozzle is supported by a support member extending from an end of the rotating cage. (2) The continuous blasting device according to claim 1, characterized in that the support member supporting the blast nozzle is constituted by a conduit that supplies air or air mixed with an abrasive to the blast nozzle. Continuous blast processing equipment.