JP2001138367A - Recovering device for moldings of injection molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recovering device for moldings of an injection molding machine, in which the moldings are frequently retained on a chute and do not fall down by leaving the moldings stuck to the chute and thereby the same are not surely recovered. SOLUTION: The recovering device 5 for the moldings includes both a recovery part 50 for recovering and stocking the moldings and an introduction part mainly consisting of a funnellike chute 20 leading the moldings to a nondefective housing vessel 41 of the recovery part 50 of the moldings. The chute 20 is formed of either a spindlelike curved surface, in which the side 21 of the chute is a spherical and the diameter is gradually reduced according as the approach to the lower part, or a continuous body, in which two or more sphericals or spindlelike cured surfaces 21d having the diameter gradually reduced according as the approach to the lower part are combined. A flange 21f is provided in the edge of an aperture 21h of the upside. The recovery part 50 of the moldings is constituted of including both a sorting part 30 of the moldings which sorts a nondefective and a defective of the sorted moldings under the chute 20 and a stock part 40 of the moldings which is installed in the lower part of the sorting part 30 and selectively positions and stops a plurality of vessels 41 housing the nondefective just under a passing cylinder provided in the sorting part 30 communicated with the chute 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article collecting apparatus for an injection molding machine, and more particularly to a molded article collecting apparatus for collecting minute molded articles.

[0002]

2. Description of the Related Art A molded article molded by an injection molding machine is ejected by an ejector when the mold is opened, and is formed of a molded article placed below a movable mold and a fixed mold. It is stored in the collection device and collected. This type of recovery apparatus is roughly divided into an introduction section mainly composed of a chute for guiding a molded article falling from a mold to a molded article collection section, and a molded article collection section for storing and storing the molded article. The molded product collection unit further includes a molded product stock unit for storing molded products.
In addition, there is a molded product collecting apparatus having a configuration in which a molded product sorting unit for sorting and storing molded products into non-defective products and defective products is provided. This sorter has various forms,
Broadly, there are a type in which a part of the chute swings to distribute the molded product in two directions, and a type in which the chute is fixed and the molded product is distributed and collected in a molded product collection section below the chute. In general, the chute has an upper opening which is an entrance thereof, which is larger than a gap between a movable mold and a fixed mold when the mold is opened, and a lower opening which is an exit thereof has a size substantially equal to an entrance dimension of a molded article stock part. It is formed in a funnel-like shape that opens to the same size.

[0003] In the above-mentioned apparatus for collecting molded articles, the molded article often stays on the chute or does not fall while attached to the chute. Such an “adhesion phenomenon” mainly occurs when the molded article adheres to the entire surface of the chute when the molded article is attracted to the chute by static electricity between the molded article and the chute. In such a case, the molded product is not properly collected in the molded product stock unit of the molded product collection unit, and a problem such as a shortage of products occurs. In particular, in a molded product collection device having a molded product distribution unit, even when the distribution unit is switched quickly in response to the result of the quality determination of molding, the timing at which the molded product falls from the chute is delayed. On the contrary, the quality of the molded product may be determined in reverse.

Therefore, for example, utility model registration No. 3006
No. 499 proposes a chute for preventing a molded article from adhering and not protruding outside.
The chute is formed by a metal plate whose side wall has a multi-porous surface almost entirely. According to this, it seems that the adhesion is certainly reduced in the case of a normal molded product.

[0005]

However, the present inventor has considered that the above-mentioned chute has room for improvement as a chute for recovering a very small molded product. This is because the finer the molded product, the finer the pores must be, while if the pores are too fine, there is a contradiction that the effect of the pores is reduced.

The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a device for collecting molded articles that can reliably collect minute molded articles in a container. It is a further object of the present invention to provide a recovery apparatus that can reliably sort non-defective products and non-defective products and reliably collect the products in a container without spilling the products outside. Other advantages of the present invention and the embodiments of the present invention will be described in detail in the description of the embodiments of the present invention.

[0007]

According to a first aspect of the present invention, there is provided an injection molding machine for an injection molding machine.
In a molded product collection device of an injection molding machine which is provided below a mold (13) attached to a mold and includes a funnel-shaped chute (20) and a molded product collection section (50), the chute (20) , Or a spindle-shaped curved surface 21 whose diameter gradually decreases as going downward.

[0008] The apparatus for collecting molded articles of an injection molding machine according to the second aspect of the present invention is installed below a mold (13) attached to the injection molding machine (1), and has a funnel-shaped chute ( In the molded product collecting apparatus of the injection molding machine provided with the molded product collecting section (50) and the chute (20),
It is characterized by being formed by a continuum of one or more spherical surfaces or spindle-shaped curved surfaces (21) whose diameter gradually decreases downward.

According to a third aspect of the present invention, there is provided a molded article collecting apparatus for an injection molding machine, wherein the molded article collecting section of the injection molding machine according to the first or second aspect of the present invention. ) Is a passing cylinder (3) for passing a good molded product.
2) and the defective product storage container (33) for storing the defective product are moved forward and backward under the chute 20, and the passing cylinder (32) or the defective product storage container (33) is selected according to the quality of the molded product. A distributing section (30) for the molded article positioned immediately below the outlet of the chute (20), and a plurality of non-defective article storage containers (41) below the distributing section (30) are detachably provided. And a molded article stock section (40) for sequentially indexing and stopping each of the containers (41) immediately below the passage cylinder (32) immediately below the outlet of the chute (20).

Note that the reference numerals in parentheses described above are for convenience showing the correspondence between the constituent elements and the embodiments on the drawings, and the present description is not limited to the illustrated examples.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail. As shown in FIG. 1, an injection molding machine 1
The injection device 2 and the mold clamping device 3 are mounted on a machine base 4. The fixed platen 11 and the movable platen 12 of the mold clamping device 3 have a fixed mold 13a and a movable mold 13b, respectively.
Is fixed, and a molten resin from the injection device 2 is filled into a cavity (not shown) formed between the two molds 13a and 13b, thereby forming a molded product. The molded product is normally ejected from the opened movable mold 13b by an ejector (not shown) and falls.

Reference numeral 5 denotes a molded product collection device for collecting and stocking the molded product. The molded product recovery device 5 is installed in an opening 4 a opened in the machine base 4 below the mold 13. The molded product recovery unit 5 in this embodiment includes a molded product distribution unit (hereinafter, simply referred to as a distribution unit) 30 and a molded product stock unit 40 for distributing good and defective molded products. And a chute 20, but the same configuration as the chute 20 described below can be adopted for the chute even in a molded product collection device that does not include the distribution unit 30.

The chute 20 has a chute side wall 21 formed on a curved surface. As shown in FIGS. 2a to 2c, the chute 20 is, specifically, a spherical chute side wall or a spindle-shaped curved chute side wall whose diameter gradually decreases as it goes downward, or a combination thereof to form a continuum. It has a chute side wall. That is, the chute side wall 21 has one spherical curved surface 2 as shown in FIG.
1a, or 1 whose diameter gradually decreases as shown in FIG. 2b
It comprises two spindle-shaped curved surfaces 21b. In addition, when the overall length of the chute 20 is long, the chute side wall 21 has the shape shown in FIG.
A continuous body 21c in which two spherical surfaces as shown in FIG. 2 are continuous and the diameter of the lower sphere is smaller than that of the upper surface, or a lower spindle shape in which two spindle-shaped curved surfaces as shown in FIG. Continuum 21 consisting of a curved surface smaller than that of
d. Of course, the continuum may be a combination of spheres and spindle-shaped curved surfaces that are continuous. The spindle-shaped curved surface also includes a curved surface having a cross section of an ellipse or a rectangle. Curved surface 2 as in FIG. 2a or 2b
1a or 21b is formed by pressing a plate, deep drawing, or drawing a cylindrical body. The continuum 21c, 21d of two or more curved surfaces as shown in FIG. 2C or 2D may be formed by welding two separately formed chutes. Then, by attaching the flange 21e to the joint, the joint is welded more easily and more reliably, and the strength of the joint is improved. A flange 21f is integrally attached to the upper end of the chute, and a guide frame 21g to be described later is integrally attached to the lower end.

By forming the chute side surface 21 in this manner, the chute surface is curved at any position. Therefore, even if a fine molded product hits any part of the chute surface, it does not adhere to the entire surface of the chute surface, so that the phenomenon of such a molded product sticking to the chute surface is avoided.

Incidentally, the chute 20 may be formed integrally with the molded product collecting section 50 or may be formed separately. If the chute 20 has an integral structure, for example, the chute 20 and the molded product collecting section 5 at the position of the guide frame 21g.
The upper end of 0 is fixed. If the chute 20 has a separate structure, the chute 20 is suspended from the frame 4b of the machine base 4 by the flange 21f at the upper end. Since the mounting of the chute is a known configuration in any structure, a detailed description thereof will be omitted, but the upper opening 21h at the upper end of the chute is as large as possible.
Further, it is arranged so as to be as close to the mold 13 as possible.

Guide frame 21g at lower end of chute 20
3, as shown in FIG. 3, comprises two members having channel-shaped cross-sections which are mounted in parallel with their concave grooves facing each other, and a connecting member which is integrally mounted over these and connected to the chute 20. . The partition plate 22 is removably inserted into the concave groove of the guide frame 21g, and can be manually slid along the guide frame 21g. Reference numeral 23 denotes a handle fixed to the partition plate 22 for manual operation. Thus, the guide frame 21g is
In addition to the role of supporting the long rectangular partition plate 22, it has a role of guiding the partition plate 22 so that the partition plate 22 can move in the horizontal direction. The partition plate 22 has one through hole 22a and another through hole 22b aligned in the longitudinal direction.
A shallow-bottomed sample collecting container 24 made of punched metal or the like for collecting a sample of a molded product is detachably set in the through hole 22b. The diameter of the through hole 22a is determined by the opening 21i on the exit side of the chute 20.
The diameter is slightly larger than or substantially equal to the diameter.

When a sample of a molded article is collected by such a partition plate 22, the partition plate 22 is inserted to the deepest position, the sample collection container 24 is positioned immediately below the lower opening of the chute 20, and a sample of the molded article is collected. After being received by the sample collection container 24, the partition plate 22 is pulled out to the lowest position shown in FIG. 3, and the sample collection container 24 is taken out to collect a sample. On the other hand, during the molding operation, the partition plate 22 is pulled out to the lowest position, the through hole 22a faces the lower opening 21i of the chute 20, and the molded product passes through the through hole 22a. This through hole 2
The gap between the chute 20 and the molded product collecting section 50 is minimized by the partition plate 22 around 2a, and the molded product is prevented from jumping out.

The sorting section 30 shown in FIG. 4 is an upper component of the molded article recovery section 50 of the present invention,
This is a device that sorts out defective products. The distributing unit 30 includes a chute 20 whose upper end is fixed to the frame 4b of the machine base 4 and is suspended, and a molded product stock unit 4 for collecting molded products.
0 and a partition plate 2 inserted in a guide frame 21g attached to the lower end of the chute 20.
2 is provided below.

As shown in FIG. 5, the distribution unit 30
A moving body 31 in which a passing cylindrical body 32 and a defective container 33 are provided in a frame 34 at predetermined intervals, a traveling rail 36 for guiding the moving body 31 so that the moving body 31 can be traversed, and air for moving the distributing moving body 31 in a traversing manner. It is configured to include the cylinder 35. To describe these in more detail, the passing cylinder 32 has a cylindrical member 32a and upper and lower flanges 32b,
32c, and is fixed to the frame body 34. The upper opening of the passage cylinder 32 is formed to have a size slightly larger than or substantially equal to the through hole 22a of the partition plate 22,
The lower opening is slightly larger than or approximately equal to the upper end entrance of the non-defective product container 41 of the molded product stock part 40, and the upper opening of the passage cylinder 32 and the lower surface of the partition plate 22 are Are arranged so that the gap between them is as small as possible. The defective container 33 is provided with the passing cylinder 32.
This is a container with a cylindrical bottom having a diameter substantially equivalent to that of the above, and the side and bottom surfaces of this cylinder are formed of a fine mesh wire mesh or punching metal. And the defective container 3
3 is removably fixed to the frame 34.

As shown in FIG. 4, the traveling rail 36 and the air cylinder 35 are fixed to the frame of the molded article collecting section 50 above the molded article collecting section 50. The frame body 34 of the moving body 31 is supported on the traveling rail 36 by rollers or bearings (not shown) and traverses by the air cylinder 35. Air cylinder 35
Is a passing cylinder 32 or a defective product container 3 according to the result of the determination of a good or defective molded product by a determination device (not shown).
The moving body 31 is moved to one of the two positions and stopped so that one of the three is located immediately below the chute 20. Actually, although different from the figure, the defective product container 33 is arranged at a position where it can be removed from the frame 34 when the passing cylinder 32 is located immediately below the chute 20. Preferably, the inside of the defective container 33 can be checked by an operator standing on the side of the injection molding machine.

In the sorting unit 30 configured as described above,
When the molded product is determined to be good, the passing cylindrical body 32 stops immediately below the exit of the chute 20 and the good product passes, while when the molded product is determined to be defective, the defective product container 33 is moved to the position of the chute 20. It stops just below the exit and the defective product is stocked in the defective product container 33. Then, the operator can check the status of occurrence of defective products. In addition, since the position of the defective product container 33 is away from the position of the non-defective product container 41, there is no possibility that the defective product container 33 and the non-defective product container 33 are confused.

The molded article stock section 40 shown in FIG.
A plurality of non-defective product storage containers 41 are detachably provided as a lower component of the molded product collection unit 50 of the present invention, and each of the non-defective product storage containers 41 is sequentially indexed under the chute 20 and stopped. The non-defective products are stocked in the non-defective product container 41 and collected. This molded product stock unit 40
, A plurality of holding plates 42a, 42b,... Holding the non-defective container 41 at predetermined angular positions and a bottom plate 43 on which the non-defective container 41 is placed, and the holding plate 42a and the bottom plate A pivot shaft 44 for integrally fixing the pivots 43 at their respective centers, bearings 45a and 45b for supporting the pivot shaft 44 to be able to pivot up and down, a geared motor 46 with a brake for pivoting the pivot shaft 44, and A shaft joint 47 for integrally connecting the output shaft and the turning shaft 44, a lifting device 48 for lifting and lowering the non-defective product container 41, and a detector for detecting the approach of convex portions 43b formed at equal intervals on the outer periphery of the bottom plate 43 51, for example, a proximity switch or a limit switch, the bearings 45a and 45b, the motor 46, the lifting / lowering device 48, and the frame of the molded article collecting section 50 for fixing the detector 51 at predetermined positions. Configured to include an arm 52.

More specifically, as shown in FIG. 7, the non-defective product container 41 is a container having a cylindrical bottom, and the cylindrical side and bottom surfaces have a fine mesh wire mesh or a large number of holes formed in stainless steel. It is formed of a punching metal as if it were drilled. As shown in FIG.
Is at least two or more disk-shaped plate members arranged at the upper part and the middle part. Each holding plate 42a, 42b, 42c has
A plurality of (preferably about six) notches 42 into which the non-defective product container 41 is inserted, according to the non-defective product container to be installed.
ah, 42bh, and 42ch are equally arranged on the same circumference inward from the periphery. The bottom plate 43 is provided with a circular hole 43a smaller than the bottom surface of the non-defective product container 41 at each position where the non-defective product container 41 is placed.

In order to detect the relative position of the non-defective product container 41 with respect to the chute 20, convex portions 43b are formed on the outer periphery of the bottom plate 43 at equal intervals. A detector 51 composed of, for example, a proximity switch is attached to the frame 52, and the proximity switch position is set such that the non-defective product container 41 is located directly below the chute 20 when the proximity switch detects the approach of the projection 43b. Has been adjusted. In the frame 52 of the molded article collecting section 50 directly below the chute 20,
For example, an air cylinder is disposed as the elevating device 48,
A pusher 49 is attached to the tip of the cylinder rod. The magnet 49a is preferably embedded in the upper surface of the pusher 49. As a result, the non-defective product container 41 indexed immediately below the chute 20 and stopped is raised without being displaced by the pusher 49 which moves up and down at the position of the circular hole 43a.

In the configuration of the present invention, a plurality of non-defective goods containers 41
Since these are turned after being mounted on 2bh, 42ch, if the non-defective product container 41 is not mounted properly,
There is a possibility that the upper end of the non-defective product container 41 may interfere with the passing cylinder 32. Therefore, the upper end of the good-quality container 41 and the passage cylinder 32
I have to make the gap with the lower end wider. However,
In the present embodiment, since the non-defective product container 41 can be raised, the upper end of the non-defective product container 41 and the lower end of the passage cylinder 32 can be brought into close contact with each other to prevent the molded product from spilling out.

In the molded product recovery section 50 thus configured, first, each non-defective product container 41 is mounted. Then, the bottom plate 43 on which the non-defective product container 41 is placed and the holding plate 42 are rotated by the motor 46,
When 3b is detected by the detector 51, it is determined that one good-quality container 41 has been indexed to a position immediately below the chute 20, and the bottom plate 43 and the holding plate 42 are stopped at this position. When the molding operation is started, the passing cylinder 32 is located directly below the chute 20 as long as the molded article is a non-defective product, and the chute 20, the passing cylinder 32, and the non-defective product container 41 are aligned on one straight line. Then, in this state, non-defective products are stocked in the non-defective product storage container 41. At this time, the air jetted from above the mold device 13 to promote the falling of the molded product is:
It is discharged from the fine holes of the non-defective product storage container 41. If the molded product is defective, the defective product storage container 33 is sent directly below the chute 20 and the defective product is stored therein.

When the number of moldings reaches a predetermined number input to a control device of a molding machine (not shown), the non-defective product container 4
1 is turned by a predetermined angle, the next non-defective container 41 is indexed to a position immediately below the chute 20 and stopped. In this way, non-defective products are successively stocked in the non-defective containers 41, and the molding operation is continued until all non-defective containers are full. When all the non-defective product containers 41 are full, each non-defective product container 41 is removed and the molded product is collected.

According to the above embodiment, since the molded product collecting section is provided with a plurality of non-defective product storage containers so as to be indexable,
Easy to remove and handle non-defective product containers. Since the pores for discharging air are formed not in the chute but in the non-defective product container, the mesh can be made large as long as the fine molded product does not pop out. Further, since the sorting unit and the non-defective product storage container are compact and have a small moving range, the size of the entire apparatus with respect to the amount of the molded product that can be stocked is also reduced. Furthermore, when the non-defective product container is set immediately below the chute or the sorting unit, the non-defective product container is configured to be lifted. The gap between the lower opening and the good-quality container can be made extremely small, and there is almost no spillage of the molded product.

The present invention is not limited to the above-described embodiment, but can be embodied in various other forms without departing from the spirit and essential characteristics thereof. Further, the configuration of each component can be modified and implemented. For example, in the embodiment, a configuration is provided in which a sorting unit for sorting non-defective products and non-defective products is provided immediately below the chute, but only a non-defective product container is positioned immediately below the chute. Also, the shoot of the present invention can be adopted. In addition, in the embodiment, the notch is provided in the holding plate supporting the non-defective product container so that the non-defective product container can be easily attached and detached, but the through hole is provided according to the outer diameter of the non-defective product container. Can be In addition, indexing and lifting / lowering of the non-defective product container can be realized by various configurations. As described above, the embodiments of the present invention are illustrative, and should not be construed as being limited thereto.

[0030]

As described above, according to the first aspect of the present invention,
Since the chute side surface of the chute is formed into a curved surface according to the molded product collection device according to the above, the molded product is properly collected in the molded product stock section of the molded product collection section.
In particular, when this chute is used in a molded product collection device provided with a molded product sorting unit that sorts non-defective products and non-defective products, the molded product quickly falls to the molded product collection unit. Non-defective products and defective products are accurately sorted and collected following the operation of the sorting unit. as a result,
This has the effect of greatly improving the reliability of the quality of the molded product.

According to the molded product collecting device of the second aspect of the present invention, the chute side surface of the chute is formed by two or more curved surfaces whose diameter gradually decreases as they go downward. Even if there is a distance from the portion to the molded product collection unit, the molded product is properly collected in the molded product stock unit of the molded product collection unit.

According to the molded product collecting apparatus of the third aspect of the present invention, the passing cylinder for passing the non-defective product and the defective container for accommodating the defective product are shot in accordance with the quality of the molded product. To quickly move back and forth underneath to selectively position the passing cylinder and the defective product container just below the outlet of the chute, and to pass a plurality of detachable non-defective product containers sequentially through the non-defective product. Since it can be located directly below the passage cylinder, the molded product is not only properly sorted and collected by the molded product stock section of the molded product collection section, but also the sorting section and non-defective product storage container are compact, The size becomes compact. In addition, it is easy to attach and detach the good-quality container and to handle it. Furthermore, since the non-defective product container is configured to be raised, there is almost no spillage of the molded product.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall schematic configuration of an injection molding machine provided with a molded product collection device of the present invention.

FIG. 2 is a view showing an embodiment of a specific configuration of a chute of the molded product collecting apparatus of the present invention, FIG. 2a shows a chute side surface, FIG. 2b shows a chute side spindle-shaped curved surface, and FIG. Is a continuum in which two spherical surfaces are continuous and the lower sphere is smaller in diameter than the upper one, and FIG. 2d is a continuum with two spindle-shaped curved surfaces in the chute side and the lower sphere is smaller in diameter than the upper one. It is a figure which shows the chute which consists of a continuum consisting of a curved surface.

FIG. 3 is a perspective view showing a specific configuration of a chute and a partition plate in one embodiment of the molded product collection device of the present invention.

FIG. 4 is a diagram showing details of an embodiment of the molded product recovery apparatus of the present invention.

5 is a view showing details of an upper portion of the molded product collecting apparatus of the present invention shown in FIG. 4. FIG.

FIG. 6 is a perspective view showing details of a lower portion of the molded product collection device of the present invention shown in FIG. 4;

FIG. 7 is a perspective view showing an example of a good product collection container in one embodiment of the molded product collection device of the present invention.

[Explanation of symbols]

 4b, frame of machine stand 5, collecting device 50, molded product collecting unit 20, chute 21d, chute side surface 21g, guide frame 22, partition plate 30, sorting unit 40, molded product stock unit 41, good product container 42a, 42b, 42c, holding plate 42ah, 42bh, 42ch, notch 43, bottom plate 44, revolving shaft 45a, 45b, bearing 46, motor 47, shaft coupling 48, elevating device 49, pusher 49a, magnet 52, frame of molded product collection section

Claims (3)

[Claims] 1. A molded product collecting apparatus for an injection molding machine, which is provided below a mold attached to the injection molding machine and includes a funnel-shaped chute and a molded product collecting section, wherein the chute has a spherical or spherical shape. A molded product recovery device for an injection molding machine, wherein the molded product is formed by a spindle-shaped curved surface whose diameter gradually decreases as going downward. 2. A molded product collection device of an injection molding machine which is provided below a mold attached to the injection molding machine and includes a funnel-shaped chute and a molded product collection section. The apparatus for collecting molded articles of an injection molding machine, wherein the molded article is formed by a continuum of a spherical surface or a spindle-shaped curved surface whose diameter gradually decreases as going downward. 3. The molded product recovery section moves a passing cylindrical body through which a non-defective product passes and a defective product storage container storing a defective product under the chute, according to the quality of the molded product. A distributing unit for a molded product that selectively positions the passing cylinder or the defective product container directly below an outlet of the chute, and a detachably provided plurality of non-defective product containers below the distributing unit; 3. A molded product stock section for sequentially indexing and stopping each one of these non-defective product storage containers immediately below the passing cylinder positioned immediately below the outlet of the chute. For collecting molded products of injection molding machines.