WO2020133106A1

WO2020133106A1 - Injection mould

Info

Publication number: WO2020133106A1
Application number: PCT/CN2018/124484
Authority: WO
Inventors: 冯炉; 邵状
Original assignee: 泰睿美精密器件(深圳)有限公司
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-02

Abstract

Disclosed is an injection mould, comprising: a first mould core (1), a second mould core (2), a third mould core (3), an insert (4) and an air discharge device, wherein the second mould core (2) is provided with an embedding channel (21), the third mould core (3) is provided with an air discharge channel (31), and the air discharge channel (31) and the embedding channel (21) are arranged correspondingly; the air discharge channel (31) is connected to the air discharge device; the insert (4) is embedded in the embedding channel (21), and a spacing for air to pass through is provided between the insert (4) and an inner wall of the embedding channel (21); when the first mould core (1), the second mould core (2) and the third mould core (3) are closed, a mould cavity is formed between the first mould core (1) and the second mould core (2); the embedding channel (21) communicates the mould cavity with the air discharge channel (31), and the insert (4) prevents molten plastic in the mould cavity from entering the air discharge channel (31); and the air discharge device vacuumizes the air discharge channel (31) to extract air out of the mould cavity.

Description

Injection mold

Technical field

The invention belongs to the technical field of injection molds, and particularly relates to an injection mold.

Background technique

Existing industrial products usually use an injection molding process, and the most important thing in the injection molding process is the structure of the mold. In the production process of industrial products, when the mold is injected with hot-melt plastic, it often brings air and hot melt. When the plastic in the shape flows in the cavity of the mold, it will squeeze the air. If the air cannot be effectively discharged, it will cause a trapped air phenomenon. Although the prior art will use an open air gap for exhaust, this exhaust The efficiency is not high, and the exhaust is not timely enough when producing products with a faster cooling rate, which will affect the quality of the injection molded products.

technical problem

In the prior art, the exhaust efficiency of the injection mold is not high, which will affect the quality of the injection product.

Technical solution

In order to solve the above technical problems, the present invention is implemented as follows. An injection mold includes: a first mold core, a second mold core, a third mold core, an insert, and an exhaust device. The second mold core and the third mold core are arranged in sequence, the second mold core is provided with an inlaid channel, the third mold core is provided with an exhaust channel, and the exhaust channel corresponds to the mosaic channel The exhaust channel is connected to the exhaust device, the insert is embedded in the mosaic channel, and there is a space for air to pass between the insert and the inner wall of the mosaic channel. When the first mold core, the second mold core, and the third mold core are injection-molded, a cavity is formed between the first mold core and the second mold core, and the mosaic channel communicates with the mold cavity and The exhaust passage, the insert prevents molten plastic in the cavity from entering the exhaust passage, and the exhaust device evacuates the exhaust passage to remove the air in the cavity Draw out.

Further, the extending direction of the mosaic channel is perpendicular to the clamping surface of the second mold core, and the bottom surface of the insert is flush with the clamping surface of the second mold core.

Further, the exhaust channel includes a connection channel and a collection channel that communicate with each other, the connection channel communicates with the mosaic channel, and the collection channel connects with the exhaust device.

Further, the extension direction of the connection channel is the same as the extension direction of the corresponding mosaic channel, and the extension direction of the collection channel is perpendicular to the extension direction of the connection channel.

Further, the cross-sectional area of the connection channel is larger than the cross-sectional area of the mosaic channel.

Beneficial effect

Compared with the prior art, the injection mold in the present invention has the following beneficial effects:

When the first mold core, the second mold core and the third mold core perform the mold clamping action, a cavity is formed between the first mold core and the second mold core, the second mold core and the third mold core contact, and the molten plastic enters the mold cavity To form a product, in this process, the exhaust device evacuates the exhaust channel, so that the exhaust channel and the mosaic channel form a negative pressure. Under the effect of negative pressure, the air in the cavity can be faster and more adequate The injection mold of the present invention can increase the rate at which the injection mold exhausts air, and can effectively eliminate the trapped gas phenomenon of the injection mold. Thereby improving the quality of products produced by injection molds.

BRIEF DESCRIPTION

1 is a schematic diagram of the overall structure of an injection mold in an embodiment of the present invention;

2 is a schematic cross-sectional view taken along line A-A in FIG. 1;

FIG. 3 is a schematic exploded view of the injection mold in the embodiment of the present invention.

In the drawings, each reference sign indicates: 001, product; 1, first mold core; 2, second mold core; 21, inlay channel; 3. third mold core; 31, exhaust channel; 311, connection Channel; 312, collection channel; 4, inserts.

Embodiments of the invention

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention.

Example:

In this embodiment, as shown in FIGS. 1-3, the injection mold includes: a first mold core 1, a second mold core 2, a third mold core 3, an insert 4 and an exhaust device (not shown). The first mold core 1, the second mold core 2 and the third mold core 3 are arranged in sequence, the second mold core 2 is provided with an inlaid channel 21, and the third mold core 3 is provided with an exhaust channel 31, the exhaust channel 31 and the inlay The channels 21 are correspondingly arranged, the exhaust channel 31 is connected to the exhaust device, the insert 4 is embedded in the mosaic channel 21, and there is a space for the air to pass between the insert 4 and the inner wall of the mosaic channel 21, when the first die 1 When the second mold core 2 and the third mold core 3 are injection-molded, a cavity is formed between the first mold core 1 and the second mold core 2, the mosaic channel 21 communicates with the cavity and the exhaust channel 31, and the insert 4 blocks The molten plastic in the cavity enters into the exhaust channel 31, and the exhaust device evacuates the exhaust channel 31 to evacuate the air in the cavity.

When the first mold core 1, the second mold core 2 and the third mold core 3 perform mold clamping, a cavity is formed between the first mold core 1 and the second mold core 2, the second mold core 2 and the third mold When the kernel 3 contacts, the molten plastic enters the cavity to form the product 001. In this process, the exhaust device evacuates the exhaust channel 31, so that the exhaust channel 31 and the mosaic channel 21 form a negative pressure. Under the effect of, the air in the cavity can pass through the space between the insert 4 and the mounting channel 21 faster and more fully and be drawn out of the mold from the exhaust channel 31 by the exhaust device. The injection mold of the present invention can improve injection The rate at which the mold exhausts air can effectively eliminate the trapped gas phenomenon of the injection mold, thereby improving the quality of the product 001 produced by the injection mold.

Specifically, in this embodiment, the extending direction of the inlay channel 21 is perpendicular to the clamping surface of the second mold core 2, and the bottom surface of the insert 4 is flush with the clamping surface of the second mold core 2, so that the resulting product 001 surface is smooth. In other embodiments, the angle between the extending direction of the mosaic channel 21 and the clamping surface of the second mold core 2 may range from 60° to 90°, for example: 60°, 61°, 62°, 63° , 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, 80 °, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88° or 89° etc.

The exhaust channel 31 includes a connection channel 311 and a collection channel 312 that communicate with each other. The connection channel 311 communicates with the mosaic channel 21, and the collection channel 312 is connected to the exhaust device. The extension direction of the connection channel 311 is the same as that of the corresponding mosaic channel 21. The extending direction of the channel 312 is perpendicular to the extending direction of the connecting channel 311. Specifically, in this embodiment, a mosaic channel 21 is provided on the second mold core 2, correspondingly, a connection channel 311 and a collection channel 312 are provided on the third mold core 3, that is, the air in the cavity There is one channel leading to the exhaust device; in other embodiments, in order to adapt to the shape and size of the cavity, two, three, four, five, six, etc. mosaic channels can be provided on the second mold core 2 21. Each inserting channel 21 may be provided with an insert 4, correspondingly, two, three, four, five, six, etc. connecting channels 311 and collecting channels 312 are provided on the third mold core 3, That is: the air in the cavity has two, three, four, five, and six channels leading to the exhaust device, which further improves the speed of air exhaust from the cavity; in other embodiments, the mosaic channel 21 and the connection The channels 311 may be provided with two, three, four, five, six, etc., but the number of the collection channels 312 is less than the number of the connection channels 311, that is, one collection channel 312 may be followed by one, two, three One, four or five connection channels 311 are connected, so that the air in the multiple mosaic channels 21 can be led to the exhaust device through a smaller number of collection channels 312, thus saving the space of the mold and reducing the mold manufacturing cost.

The cross-sectional area of the connection channel 311 is larger than the cross-sectional area of the mosaic channel 21. In this embodiment, the cross section of the connecting channel 311 (the cross section mentioned in this paragraph is a cross section parallel to the first mold core 1) is circular, the cross section of the mosaic channel 21 is rectangular, and the cross section of the connecting channel 311 The cross-section of the mosaic channel 21 is completely covered, so as to ensure that the edge of the connection channel 311 is outside the edge of the mosaic channel 21, so as to avoid the third mold core 3 blocking the space between the insert 4 and the mosaic channel 21, ensuring the air Smooth circulation; in other embodiments, the cross-sections of the connecting channel 311 and the mosaic channel 21 may be circular, triangular, quadrangular, pentagonal, hexagonal, etc. Of course, the connection channel 311 and the corresponding mosaic channel 21 The cross-sections can also be different. The cross-sections of the connection channel 311 and the mosaic channel 21 can be any two types of circle, triangle, quadrangle, pentagon, hexagon, heptagon, etc., as long as the connection channel 311 is guaranteed The cross-section can completely cover the cross-section of the mosaic channel 21.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in the protection of the present invention Within range.

Claims

An injection mold is characterized by comprising: a first mold core (1), a second mold core (2), a third mold core (3), an insert (4) and an exhaust device, the first mold Kernel (1), the second mold kernel (2) and the third mold kernel (3) are arranged in sequence, the second mold kernel (2) is provided with a mosaic channel (21), the third mold An exhaust channel (31) is opened on the kernel (3), the exhaust channel (31) and the mosaic channel (21) are provided correspondingly, the exhaust channel (31) is connected to the exhaust device, so The insert (4) is embedded in the mosaic channel (21), and there is a space for air to pass between the insert (4) and the inner wall of the mosaic channel (21), when the first mold When the mold (1), the second mold core (2) and the third mold core (3) are injection-molded, between the first mold core (1) and the second mold core (2) A cavity is formed, the mosaic channel (21) communicates with the cavity and the exhaust channel (31), and the insert (4) blocks molten plastic in the cavity from entering the exhaust channel ( In 31), the exhaust device evacuates the exhaust channel (31) to evacuate the air in the cavity.
The injection mold according to claim 1, wherein the extending direction of the inlay channel (21) is perpendicular to the clamping surface of the second mold core (2), and the bottom surface of the insert (4) is The clamping surface of the second mold core (2) is flush.
The injection mold according to claim 2, wherein the exhaust channel (31) includes a connecting channel (311) and a collection channel (312) that communicate with each other, and the connecting channel (311) communicates with the mosaic channel (21), the collecting channel (312) is connected to the exhaust device.
The injection mold according to claim 3, wherein the extending direction of the connecting channel (311) is the same as the extending direction of the corresponding mosaic channel (21), and the extending direction of the collecting channel (312) is perpendicular In the extending direction of the connecting channel (311).
The injection mold according to claim 3 or 4, characterized in that the cross-sectional area of the connecting channel (311) is larger than the cross-sectional area of the mosaic channel (21).