JPH03264318A - Multi-color molding device - Google Patents

Abstract

PURPOSE:To form a secondary formed product of the shape of wrapping a primary molded material with a secondary forming synthetic resin material in a secondary forming mold by bonding a rotating transfer bed of a movable mold main body with a fixed mold main body to form a primary molding tool and a secondary forming mold, feeding the primary molded product into the secondary forming mold, and then injecting the primary molded synthetic material into the primary molding tool and injecting the secondary forming synthetic resin material into the secondary forming mold. CONSTITUTION:A rotating transfer bed 4 is rotated by 180 deg. in the state that a primary molding products 10 and 11 are adhered to a male mold block 5. After that, a first ejector base 22 is returned to the original state, and the rotating transfer bed 4 is returned until being brought into contact with a backing plate 17 while ejector pins 26 and 27 and also pressing pins 26a and 27a are inserted into pin inserting holes 4c and 4d. Further, an injection molding device is driven and a movable mold main body 2 is brought into contact with a fixed mold main body 40. At that time, a red primary molded material 10 and an yellow molded material 11 are provided in a forming mold formed with a second female mold block 43 and the male mold block 5. In said state, a blue synthetic resin material G4 is fed from a side injection nozzle into the secondary forming mold through a runner channel 46.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a multicolor molding device attached to an injection molding device.

[Prior Art] Conventionally, there has been a multi-color molding device attached to an injection molding device as shown in FIG.

This multicolor molding device 50 is comprised of a fixed mold body 51 attached to the fixed side and a movable mold body 52 attached to the movable side. A primary mold 56 and a secondary mold 57 are formed by cavities 53.54 provided on the surface of the fixed mold body 51 and a pair of cores 55.55 provided on the surface of the movable mold body 52. It is now possible to do so. Furthermore, ejection pins 58 for ejecting the molded product and a pair of ejection bases 59 for ejecting the pins are provided.

Therefore, after pouring the primary material into the primary mold 56 to form a primary molded product, the entire movable mold body 52 is approximately 180 mm
° Rotate and store the second bottom shaped object in the secondary mold 57,
A secondary material is poured into this secondary mold 57 to form a secondary molded product. Then, the formed secondary molded product is pushed out on one side. An ejector pin 58 allows the ejector to be ejected.

[Problems to be Solved by the Invention] The conventional multicolor molding device 50 described above had a problem in that the entire movable mold body 52 was rotated by the injection molding device to which it was attached, which placed a heavy burden on the injection molding device. .

Furthermore, since two ejection bases are required to eject one molded product, there is a problem in that the number of parts increases and the cost increases.

The present invention has been devised in view of the above-mentioned problems, and provides an extremely low-cost multicolor molding device that reduces the burden on the injection molding device to which it is attached, and has a simplified structure by reducing the number of parts. The purpose is to

[Means for Solving the Problems] A multicolor molding device according to the present invention has been devised to achieve the above object, and has the following configuration.

(a) Consists of a movable mold body that is attached to the movable side of the injection molding device and a fixed mold body that is attached to the fixed side.

(b) The movable mold body shall consist of a base and a rotary transfer table attached to a rotating shaft rotatably provided on the base and movable in the direction of the fixed mold body.

(c) The rotary transfer table has an identical core formed symmetrically across the rotation axis, and the fixed mold body has a first core that is joined to the core to form a primary mold and a secondary mold. and a second cavity is formed.

(iv) The base includes an ejector pin that inserts and projects the secondary molded product formed by the secondary mold through an insertion hole provided in the rotary transfer table, and - a synthetic resin material injected into the secondary mold. A holding pin is provided to prevent the liquid from flowing out of the insertion hole.

[Function] The multicolor molding apparatus having the above configuration is used as follows.

A movable mold body is attached to the moving side of the injection molding device, and a fixed mold body is attached to the stationary side. The injection molding device is driven to join the rotary transfer table of the movable mold body to the fixed mold body to form a primary mold and a secondary mold. Inject the primary synthetic resin material into the primary mold. At this time, since the presser pin is inserted into the insertion hole formed in the secondary mold, the primary synthetic resin material injected into the secondary mold is prevented from flowing out from the insertion hole. In addition, the injection molding device is driven to move the rotary transfer table of the movable mold body away from the fixed mold body, and then move only the rotating shaft toward the fixed mold body side, release the rotary transfer table from the base, and eject. Remove the pin and presser pin from the rotating transfer table. Then, after the rotary transfer table is rotated by the rotary shaft and brought into contact with the base, the ejecting pin and the holding pin are inserted into the insertion holes of the rotary transfer table. Furthermore, the injection molding device is driven to join the rotary transfer table of the movable mold body to the fixed mold body to form a primary mold and a secondary mold, and feed the primary molded product into the secondary mold. Next, a primary synthetic resin material is injected into the primary mold, and a secondary synthetic resin material is injected into the secondary mold. As a result, a secondary molded product in which the primary molded product is wrapped with a secondary synthetic resin material is molded in the secondary mold. Further, the injection molding device is driven to separate the rotary transfer table of the movable mold body from the fixed mold body, and the ejector pin is operated to separate the secondary molded product from the rotary transfer table. In this way it is used continuously.

“Embodiment” An embodiment of the present invention will be described below based on the drawings. The multicolor molding device 1 consists of a movable mold body 2 attached to the movable side of the injection molding device S, and a fixed mold body 40 attached to the stationary side of the injection molding device S (see Fig. 6). .

The movable mold main body 2 consists of a base 3 and a rotary transfer stage 4, and a rotary transfer stage 4 is provided at approximately the center of the base 3 so as to pass through the base 3, as shown in FIGS. A shaft 3a is provided so as to be rotatable and slidable in the direction of the fixed mold body 40. A rotary transfer table 4 is fixedly attached to a protruding shaft 3b formed at the tip of this rotary shaft 3a. On the surface 4a of the rotary transfer table 4, identical male pieces 5 are fixedly attached with bolts or the like on both sides of the rotary shaft 3a. Further, on the surface 4a of the rotary transfer table 4, as shown in FIG. 4, a plurality of runner grooves 6.degree. 7 are formed for pouring the synthetic resin material G into each male piece 5. The runner groove 6 is filled with red synthetic resin material G from the injection nozzle on the side.
The runner groove 7 is for pouring the yellow synthetic resin material G2 from the injection nozzle on the opposite side, thereby forming a red blow-molded article 10 and a yellow blow-molded article 11. be done.

The base 3 has a movable mounting plate 15 that is attached to a moving part of the injection molding apparatus S, a rear support plate 16, and a front support plate 17 that comes into contact with the back surface 4b of the rotary transfer table 4. Furthermore, a spacer block 18 is interposed between the movable mounting plate 15 and the plate 16 of the rear bracket to form a first space 19. A spacer block 20 is also interposed between them to form a second space 21. In the first space 19, a first protruding base 22 is provided.
is movably attached to the lower end of the rotating shaft 3. Push-out bins 23 are erected on both sides of the first protrusion base 22 for abutting against the back surface 4b of the rotary transfer table 4 and for pushing out the rotary transfer table 4. In the second space 21, a second protruding base 24 is attached to a hydraulic cylinder 25 and is movably provided.

In this second protruding base 24, the front receiver is inserted into the bottle insertion holes 17a, 17b formed in the plate 17 and the pin insertion holes 4c, 4d formed in the rotary transfer table 4 to form a secondary three-color molded product. 12. Projection bins 26 and 27 for projecting the secondary three-color molded product 13 from the male piece body 5 are provided upright. Further, on the opposite side of the protruding pins 26 and 27 across the rotating shaft 3, the front receiver has a presser pin 26a and a presser pin 27 on the plate 17.
A is erected. This presser bottle 26a and presser pin 2
7a indicates pin insertion holes 17a, 17b and pin insertion holes when the synthetic resin material G is injected into the first mold formed between the male piece 5 and the first female piece 42 described later. 4c, 4d
It is designed to prevent the synthetic resin material G from flowing inside. Further, in the rear receiver, an intermediate cavity 28 is formed approximately in the middle of the plate 16, and a spur gear 3c is provided in this intermediate cavity 28 so as to be attached to the rotating shaft 3a. This spur gear 3C is always in mesh with a rack 29 attached to a drive rod of a hydraulic cylinder (not shown) fixedly attached to the base 3.

A first female piece 42 and a second female piece 43 are symmetrically fixed and attached to the surface 41 of the fixed mold body 40 with bolts or the like.

Further, on the surface 41 of the fixed mold body 40, as shown in FIG. Groove 45.
46 is formed.

The runner '71It45 communicates with a material flow hole 44 formed approximately at the center of the fixed mold body 40, and
The white synthetic resin material G3 is poured from the injection nozzle of the injection molding device on the 0 side.

The runner groove 46 is for pouring the blue synthetic resin material G4 from the side injection nozzle.

Next, how to use it will be explained.

The movable mold body 2 is fixed to the movable side of the injection molding apparatus S via the movable mounting plate 15, and the fixed mold body 40 is attached to the fixed side (see FIG. 6). The injection molding apparatus S is driven to bring the movable mold body 2 into contact with the fixed mold body 40 (see FIG. 1). The red synthetic resin material G1 and the yellow synthetic resin material G2 injected from side injection nozzles into the primary mold formed by the male piece body 5 and the second female piece body 42 are passed through the runner grooves 6 and 7. And send it in. As a result, a red sub-bottom object 10 and a yellow sub-bottom object 11 are molded in the sub-bottom mold. At this time, since the pin insertion holes 4c and 4d of the rotary transfer table 4 are closed by the presser pins 26a and 26b, the synthetic resin materials G1 and 2 do not leak therefrom. Next, the injection molding device S is driven to separate the movable mold body 2 from the fixed mold body 40, and the pressing shaft 50 of the injection molding device S
is operated to push out the first ejecting base 22. By pushing out the first protruding base 22, the rotary transfer table 4 is pushed forward via the rotation shaft 3a and the pushing pin 23 (see FIG. 2). Since the ejecting pins 26 and 27 and the holding pins 26a and 27a do not move, the rotating transfer table 4
Karanuki is out.

With the bottom-shaped object 10.11 attached to the male piece 5, a hydraulic cylinder (not shown) is operated to move the rack 29, and the rotating transfer table 4 is moved via the spur gear 3c and the rotating shaft 3a.
Rotate 180°. After that, when the operation of the pressing shaft 50 of the injection molding apparatus S is released and the first ejecting base 22 is returned to its original state, the rotary transfer table 4 is moved to the bottle insertion hole 4c.
, 4d with ejector pins 26, 27 and presser pins 26a,
While inserting 27a, the front end is returned until it abuts against the plate 17. Furthermore, the injection molding device is driven to move the mold body 2.
is brought into contact with the fixed mold body 40 (see FIG. 1). At this time, there is nothing in the primary mold formed by the first female piece body 42 and male piece body 5, and there is nothing inside the primary mold formed by the second female piece body 43 and male piece body 5. In the secondary mold, a red sub-bottom object 10 and a yellow sub-bottom object 11 are provided. In this state, the red synthetic resin material G1 and the yellow synthetic resin material G2 are fed into the primary mold in the same manner as described above, and at the same time, the injection molding device Is on the fixed mold body 40 side is injected into the secondary mold. Transfer the white synthetic resin material G3 from the nozzle to the material distribution hole 44. The blue synthetic resin material G4 is fed into the runner groove 4 through the injection nozzle on the side.
6. As a result, in the secondary mold, a secondary two-color molded product 12 having a shape in which the red-shaped bottom-shaped object 10 and the yellow-shaped bottom-shaped object 11 are wrapped in the white synthetic resin material G3, and the red-shaped bottom shaped object 11 are formed.
A secondary three-color molded product 13 in which the sub-bottom shaped product 10 and the yellow secondary molded product 11 are wrapped in a blue synthetic resin material G4, and a white runner 47 are molded. Next, drive the injection molding device S to separate the movable mold body 2 from the fixed mold body 40, and
The second protruding base 24 is activated by operating the hydraulic cylinder 25.
Push out.

By pushing out the second projecting base 24, the projecting pins 26 and 27 are pushed out from inside the male piece body 5, and the secondary two-color molded product 12. The secondary three-color molded product 13 is separated from the male mold piece 5 and dropped outside the injection molding apparatus (see FIG. 3). and,
The operation of the hydraulic cylinder 25 is released to return the second projecting base 24 to its original state, and the projecting pins 26 and 27 are returned to the male piece body 5. Next, as mentioned above, the injection molding apparatus S
The pressing shaft 50 of the first protruding base 22 degree rotation shaft 3. Push out the rotary transfer table 4 forward via the push-out pin 23 (see Fig. 2), and rotate the rotary transfer table 4 to transfer the primary molded product 10.11 molded into the primary mold into the secondary mold. Transport. In this way, multicolored molded products are continuously produced.

[Effects of the Invention] The present invention has the effect of providing an extremely low-friction multicolor molding device that has a simplified structure with a reduced number of parts.

[Brief explanation of drawings]

1 to 3 are overall side views showing one embodiment of the present invention, FIG. 4 is an enlarged plan view of essential parts, and FIG. 5 is an overall perspective view showing one embodiment of the present invention in use. FIG. 6 is a side sectional view showing the prior art. 1...Multicolor molding device, 2...Moving mold body, 3...
・Base, 3a... Rotating shaft, 4... Rotating transfer table, 4a
, 4b, 4c, 4d --- pin insertion hole, 5... male piece body, ]. 0,11...-Next base shape object, 12.13...
Secondary molded product, 22... first protrusion base, 23...
- Extrusion pin, 24...Second extrusion base, 26
．． 27... Ejection pin, 26a, 26b... Presser pin, 40... Fixed mold body, 42... First female piece body, 43... Second female piece body, S ...Injection molding equipment

Claims (1)

[Claims] A multicolor molding device having the following requirements. (a) Consists of a movable mold body that is attached to the movable side of the injection molding device and a fixed mold body that is attached to the fixed side. (b) The movable mold body shall consist of a base and a rotary transfer table attached to a rotating shaft rotatably provided on the base and movable in the direction of the fixed mold body. (c) The rotary transfer table has an identical core formed symmetrically across the rotation axis, and the fixed mold body has a first core that is joined to the core to form a primary mold and a secondary mold. and a second cavity is formed. (d) The base includes an ejector pin that inserts and projects the secondary molded product formed by the secondary molding die through an insertion hole provided in the rotary transfer table, and a synthetic resin material injected into the primary molding die. A presser pin is provided to prevent water from flowing out of the insertion hole.