CN210477634U

CN210477634U - Double-color plastic mold

Info

Publication number: CN210477634U
Application number: CN201920858372.6U
Authority: CN
Inventors: 黄云东
Original assignee: Chengdu Aerospace Mould&plastics Co Ltd Chengdu Mould Branch
Current assignee: Chengdu Aerospace Mould&plastics Co Ltd Chengdu Mould Branch
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-05-08
Anticipated expiration: 2029-06-10

Abstract

The utility model discloses a double-colored plastic mould, including cover half and movable mould, be provided with the core on the cover half, the symmetry is provided with two shaping cavitys on the core, shaping cavity bottom all is provided with flexible glue runner and ebonite runner, be provided with the die cavity that corresponds with the core on the movable mould, be provided with ebonite mould benevolence and flexible glue mould benevolence in the die cavity, flexible glue mould benevolence and shaping cavity cooperation form the ebonite chamber in shaping cavity bottom, ebonite mould benevolence and shaping cavity cooperation form the ebonite chamber in flexible glue chamber top, flexible glue runner intercommunication ebonite chamber, ebonite runner intercommunication ebonite chamber, be provided with cutter mechanism on the ebonite mould benevolence for cut off flexible glue runner and flexible glue chamber. The utility model discloses an earlier pouring flexible glue, the casting shaping structure of pouring ebonite has improved manufacturing accuracy, production efficiency and product quality again, has still practiced thrift the production maintenance cost.

Description

Double-color plastic mold

Technical Field

The utility model relates to a plastic shaping field, in particular to double-colored plastic mould.

Background

The common rotary double-color injection molding process is a molding method of firstly injecting hard glue and then injecting soft glue, generally, the soft glue is lapped on the hard glue, the hard glue is rotated 180 degrees after being subjected to one-time injection molding, and then the soft glue is injected for the second time; when the soft rubber is lapped below the hard rubber product, the gate valve type structure, the core stripping rotary structure, the secondary injection molding structure and the like can be selected according to the size and the cross section shape of the soft rubber product. The gate valve type structure requires that the molding section of a product is regular, and a gate valve sheet is easy to damage; the core-removing rotary structure of the mold core has high requirement on the manufacturing precision of the mold, low efficiency and high cost for using, maintaining and maintaining the mold; the secondary injection molding requires that the hard rubber product is reliably positioned, the risk of damaging the appearance surface by secondary mold closing is higher, when the hard rubber product is PC + ABS, the appearance surface is texture, and the soft rubber TPS can not be molded by gate valve type, core-removing rotation and secondary injection molding at the bottom of the hard rubber, so that a double-color plastic mold is developed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the problem that appears in the above-mentioned technique, provide a double-colored plastic mould, can be used to pour the flexible glue earlier, pour the injection moulding process of ebonite again.

In order to solve the technical problem, the utility model discloses a technical scheme as follows:

the utility model provides a double-colored plastic mould, includes cover half and movable mould, be provided with the core on the cover half, the symmetry is provided with two shaping cavitys on the core, shaping cavity bottom all is provided with flexible glue runner and ebonite runner, be provided with the die cavity that corresponds with the core on the movable mould, be provided with ebonite mould benevolence and flexible glue mould benevolence in the die cavity, flexible glue mould benevolence and shaping cavity cooperation form the ebonite chamber in shaping cavity bottom, ebonite mould benevolence and shaping cavity cooperation form the ebonite chamber above the flexible glue chamber, flexible glue runner intercommunication ebonite chamber, ebonite runner intercommunication ebonite chamber, be provided with cutter mechanism on the ebonite mould benevolence for cut off flexible glue runner and flexible glue chamber.

Further, as a preferred technical scheme, the cutter mechanism comprises a plurality of cavity cutters distributed along the outer contour line of the outer end surface of the hard rubber mold core, and the cavity cutters are respectively arranged at positions on the hard rubber mold core corresponding to the soft rubber flow channels.

Further, as a preferred technical scheme, the cavity cutter is of a triangular prism structure, the upper end face of the cavity cutter is fixedly connected to the hard rubber mold core, the outer end face of the cavity cutter and the outer peripheral face of the hard rubber mold core are located in the same horizontal plane, the inner side face of the cavity cutter is an inclined face inclined downwards towards the outer end face direction, and a cutter cutting edge is formed between the inner side face and the outer end face.

Further, as preferred technical scheme, it evenly is provided with a plurality of back-off chambeies to lie in the shaping cavity on the core, the back-off chamber sets up in the inner wall of shaping cavity along shaping cavity inner wall contour line distribution, makes the back-off chamber be located the outside in flexible glue chamber, back-off chamber intercommunication flexible glue chamber for at the peripheral little back-off that forms of flexible glue when the shaping flexible glue.

Further, as a preferred technical scheme, the inverted-buckling cavity is of an inverted-triangular cross-sectional structure.

The utility model discloses the beneficial effect who has:

the utility model is provided with a soft rubber cavity and a hard rubber cavity, and the soft rubber runner suspended on the soft rubber cavity is utilized to finish the soft rubber pouring during the pouring, and the hard rubber pouring is finished after the rotation; set up cutter mechanism in the flexible glue runner corresponds position department, advances the runner with the flexible glue runner and cuts off, because the not enough problem that arouses the ebonite flash of flexible glue rigidity when having prevented the injection ebonite, cutter mechanism plays the glue effect of gluing when injecting the ebonite simultaneously, and this mould can be used to pour the flexible glue earlier, and the injection moulding process of pouring the ebonite again can effectively improve product injection moulding precision, has improved production efficiency and product quality simultaneously by a wide margin.

Drawings

FIG. 1 is a schematic view of the fixed mold structure of the present invention;

FIG. 2 is a schematic structural view of the movable mold of the present invention;

FIG. 3 is a schematic view of a structure of a soft rubber flow channel and a soft rubber product;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is a schematic diagram of a cavity cutter structure.

In the figure: 1-moving die, 2-core, 3-fixed die, 4-slide block, 5-soft rubber flow channel, 6-hard rubber flow channel, 7-forming cavity, 8-soft rubber, 9-back-off cavity, 10-soft rubber cavity, 11-small back-off, 12-hard rubber cavity, 13-cavity cutter, 14-soft rubber mold core, 15-hard rubber mold core and 16-cavity.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

Examples

A double-colored plastic mould as shown in fig. 1, fig. 2 and fig. 5, including cover half 1 and movable mould 3, be provided with core 2 on the cover half 1, the symmetry is provided with two shaping cavity 7 on the core 2, shaping cavity 7 bottom all is provided with flexible glue runner 5 and ebonite runner 6, be provided with the die cavity 16 that corresponds with core 2 on the movable mould 3, be provided with ebonite mould benevolence 15 and flexible glue mould benevolence 14 in the die cavity 16, flexible glue mould benevolence 14 and shaping cavity 7 cooperation form ebonite chamber 10 in shaping cavity 7 bottom, ebonite mould benevolence 15 and shaping cavity 7 cooperation form ebonite chamber 12 above flexible glue chamber 10, flexible glue runner 5 intercommunication ebonite chamber 10, ebonite runner 6 intercommunication ebonite chamber 12, be provided with cutter mechanism on the ebonite mould benevolence 15 for cut off flexible glue runner 5 and flexible glue chamber 10. The soft rubber mold core 14 and the hard rubber mold core 15 correspond to the soft rubber cavity 10 and the hard rubber cavity 12 respectively, and the mold core is matched with the cavity to form a pouring cavity. The two molding cavities 7 are identical in shape and are symmetrically arranged, so that the fixed mold can still be matched with the corresponding movable mold core or fixed mold core after rotating. In order to ensure that the hard glue is overflowed due to insufficient rigidity of the soft glue when the hard glue 9 is injected, a cutter mechanism is additionally arranged on the side of the cavity at the corresponding position of the soft glue runner 5, the pouring gate of the soft glue runner 5 is cut off, and the cavity cutter 13 simultaneously plays a role in sealing the hard glue when the hard glue 9 is injected.

As shown in fig. 5, the cutter mechanism includes a plurality of cavity cutters 13 distributed along the outer contour line of the outer end surface of the hard rubber mold core 15, and the cavity cutters 13 are respectively disposed at positions on the hard rubber mold core 15 corresponding to the soft rubber flow channels 5. The die cavity cutter 13 is of a triangular prism structure, the upper end face of the die cavity cutter is fixedly connected to the hard rubber die core 15, the outer end face of the die cavity cutter and the outer peripheral face of the hard rubber die core 15 are located in the same horizontal plane, the inner side face of the die cavity cutter 13 is an inclined face inclined downwards towards the direction of the outer end face, and a cutter cutting edge is formed between the inner side face and the outer end face. The cavity cutter 13 is designed to be of a triangular prism structure, so that the cutting-off effect on the soft rubber cavity 10 and the soft rubber runner 5 can be effectively achieved. The inclined plane completely covers the pouring gate surface of the soft rubber runner 5, so that the inclined plane can completely block the pouring gate of the soft rubber runner 5, and prevent rubber leakage due to gaps.

As shown in fig. 3 and 4, evenly be provided with a plurality of back-off chamber 9 on the core 2 in the shaping cavity 7, back-off chamber 9 sets up in the inner wall of shaping cavity 7 along the distribution of 7 inner wall contour lines of shaping cavity, makes back-off chamber 9 be located the outside in soft glue chamber 10, back-off chamber 9 intercommunication soft glue chamber 10 for at the peripheral little back-off 11 that forms of flexible glue when the shaping flexible glue, back-off chamber 9 is the inverted triangle structure, and inverted triangle structure upper portion is greater than the lower part, can play the effect that prevents flexible glue 8 along with the motion of movable mould 3 when the mould sinking for the first time, fixes flexible glue 8 at the flexible glue intracavity.

Preferably, a plurality of sliding blocks 4 are arranged on the mold core 2 around the molding cavity, and the sliding blocks 4 can slide towards the molding cavity. The function of the slide block 4 is to ensure the stability of die assembly.

During operation, at the first injection flexible glue (ebonite chamber not injection moulding) in the flexible glue chamber that flexible glue mould benevolence corresponds behind the die cavity core compound die, the flexible glue runner adopts big water gap side to advance gluey, the mould sinking after the injection is accomplished, the faller is not ejecting, for guaranteeing the die sinking back flexible glue product on-stick die cavity leads to the flexible glue to drop, there is the little back-off of increase flexible glue in the core side, the water route in ebonite chamber needs independent control so that adjust the risk that mould temperature control flexible glue glues the die cavity, the flexible glue chamber only guarantees that the flexible glue part is sealed can, all the other positions keep away the sky, the ebonite slider, the flexible glue slider withdraws from under oblique guide pillar drive according to normal structure. The core is rotatory 180 degrees compound dies, and ebonite slider, flexible glue slider are according to normal structure compound dies, inject the ebonite, because the not enough ebonite flash that arouses of flexible glue rigidity when guaranteeing to inject the ebonite, it has cutter mechanism to correspond flexible glue chamber side at the flexible glue runner and increase, guarantees to advance the runner with the flexible glue runner and cuts off, and the cutter plays the gluey effect of gluing when injecting the ebonite simultaneously. And opening the mold after the injection of the hard rubber is finished, ejecting a side needle plate of the hard rubber cavity, resetting the mold core to rotate 180 degrees after the product is taken, closing the mold core cavity, and starting the next molding cycle.

The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.

Claims

1. A double-color plastic mold comprises a fixed mold (1) and a movable mold (3), and is characterized in that a core (2) is arranged on the fixed mold, two molding cavities (7) are symmetrically arranged on the core (2), a soft rubber runner (5) and a hard rubber runner (6) are arranged at the bottoms of the molding cavities (7), a mold cavity (16) corresponding to the core (2) is arranged on the movable mold, a hard rubber mold core (15) and a soft rubber mold core (14) are arranged in the mold cavity (16), the soft rubber mold core (14) is matched with the molding cavities (7), a soft rubber cavity (10) is formed at the bottom of the molding cavity (7), the hard rubber mold core (15) is matched with the molding cavity (7), a hard rubber cavity (12) is formed above the soft rubber cavity (10), the soft rubber runner (5) is communicated with the soft rubber cavity (10), and the hard rubber runner (6) is communicated with the hard rubber cavity (12), and a cutter mechanism is arranged on the hard rubber mold core (15) and is used for separating the soft rubber flow channel (5) from the soft rubber cavity (10).

2. The two-color plastic mold according to claim 1, wherein the cutter mechanism comprises a plurality of cavity cutters (13) distributed along the outer contour line of the outer end surface of the hard rubber mold core (15), and the cavity cutters (13) are respectively arranged on the hard rubber mold core (15) at positions corresponding to the soft rubber flow channels (5).

3. The two-color plastic mold according to claim 2, wherein the cavity cutter (13) is a triangular prism structure, the upper end surface of the cavity cutter (13) is fixedly connected to the hard rubber mold core (15), the outer end surface of the cavity cutter (13) and the outer circumferential surface of the hard rubber mold core (15) are located in the same horizontal plane, the inner side surface of the cavity cutter (13) is an inclined surface inclined downward toward the outer end surface, and a cutter edge is formed between the inner side surface and the outer end surface.

4. The double-color plastic mold according to claim 1, wherein a plurality of back-off cavities (9) are uniformly arranged on the mold core (2) in the molding cavity (7), the back-off cavities (9) are distributed on the inner wall of the molding cavity (7) along the contour line of the inner wall of the molding cavity (7), so that the back-off cavities (9) are located on the outer side of the soft rubber cavity (10), and the back-off cavities (9) are communicated with the soft rubber cavity (10) and used for forming small back-offs (11) on the periphery of the soft rubber when the soft rubber (8) is molded.

5. Double-colored plastic mould of claim 4, characterized in that the undercut cavity (9) is of inverted triangular cross-sectional configuration.