WO2021097950A1

WO2021097950A1 - Deformation-prevention injection mold

Info

Publication number: WO2021097950A1
Application number: PCT/CN2019/123852
Authority: WO
Inventors: 时阳; 邵状
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声精密制造科技(常州)有限公司
Priority date: 2019-11-19
Filing date: 2019-12-07
Publication date: 2021-05-27
Also published as: CN110696297A

Abstract

Disclosed is a deformation-prevention injection mold (10). The deformation-prevention injection mold (10) comprises an upper mold component (1), a lower mold component (2), a mold cavity (3), through holes (4), mold-ejector rods (5), and push plates (6). The through holes (4) comprise first through holes (41) and a second through hole (42). The second through hole (42) is provided at the middle of the bottom of the mold cavity (3). The first through holes (41) comprise at least two through holes which are provided circularly with respect to the second through hole (42) and which are spaced apart from the second through hole (42). The mold-ejector rods (5) include at least two first mold-ejector rods (51) matching the first through holes (41) and a second mold-ejector rod (52) matching the second through hole (42). The first mold-ejector rods (51) are respectively inserted into the first through holes (41) and form a sliding connection therewith, and the second lower mold ejector rod (52) is inserted into the second through hole (42) to form a sliding connection therewith. The push plates (6) include a first push plate (61) and a second push plate (62). The first push plate (61) and the second push plate (62) are both arranged opposite to the lower mold component (2) and are spaced apart therefrom, and are independent of each other. The first push plate (61) and the second push plate (62) are fixedly connected to the first mold ejector rods (51) and the second mold ejector rod (52), respectively. Compared to the prior art, the deformation-prevention injection mold (10) can prevent deformation of a product , such as shrinking, when the product is ejected by the mold-ejector rods (5).

Description

Plastic injection mould

Technical field

The invention relates to the field of injection molding, in particular to a plastic injection mold.

Background technique

With the continuous development of science and technology, more and more products are made of plastic materials, and the required shape requires the use of corresponding molds for injection molding.

The related art injection molding mold includes an upper mold, a lower mold disposed opposite to the upper mold, a cavity formed by recessing from the lower mold in a direction away from the upper mold, and a communication that penetrates the bottom of the mold cavity and communicates with the outside. A port, a lower mold ejector rod matched with the through port, and a push plate fixedly connected with the lower mold ejector rod.

technical problem

However, the plastic injection mold in the related art has only one push plate, and when the push plate pushes the lower mold ejector pin to set a product, the product shrinks and deforms, and the curved product cannot be corrected.

Therefore, it is necessary to provide a new injection mold to solve the above technical problems.

Technical solutions

The purpose of the present invention is to provide an injection molding mold that does not deform the product.

In order to achieve the above object, the present invention provides a plastic injection molding mold, which includes an upper mold, a lower mold matched with the upper mold, and a direction away from the upper mold from the side of the lower mold close to the upper mold. A cavity formed by a recess, a through port that penetrates the bottom of the mold cavity and communicates the cavity with the outside, a lower mold ejector pin inserted into the through port and forms a sliding connection, and a lower mold ejector pin fixed to the lower mold ejector Connected push plate;

The port includes a first port and a second port, the second port is opened at the center of the bottom of the mold cavity, and the first port includes at least two and is ringed at the second port. A port, which is arranged at an interval from the second port;

The lower mold ejector rod includes at least two first lower mold ejector rods matched with the first port and a second lower mold ejector rod matched with the second port. The first lower mold ejector rods Are respectively inserted into the first port and form a sliding connection, and the second lower mold ejector rod is inserted into the second port and forms a sliding connection;

The push plate includes a first push plate and a second push plate. Both the first push plate and the second push plate are arranged opposite to the lower mold at intervals and are independent of each other. The second push plate is respectively fixedly connected with the first lower mold ejector rod and the second lower mold ejector rod.

Preferably, the end surface of the first lower mold ejector rod away from the lower mold is fixedly connected to the first push plate, and the end surface of the second lower mold ejector rod away from the lower mold is connected to the second The push plate is fixedly connected, and the second push plate is located between the first push plate and the lower mold.

Preferably, the second push plate is sleeved on the first lower mold ejector pin, and forms a sliding connection with the first lower mold ejector pin.

Preferably, the first port includes two ports, which are respectively located on opposite sides of the second port.

Preferably, the two first ports are symmetrically arranged with respect to the second ports.

Preferably, the first port and the second port are both square.

The present invention also provides a method for using a plastic injection mold for plastic parts. The method includes the following steps:

The material flow is injected into the mold cavity through an injection molding machine, and the material flow is solidified to form a product located in the mold cavity; the upper mold and the lower mold are opened, the first push plate and the second push The plate pushes the first lower mold ejector rod and the second lower mold ejector rod respectively, and the first lower mold ejector rod and the second lower mold ejector rod eject the product in the mold cavity ；

When the first lower mold ejector pin and the second lower mold ejector pin eject the product:

If the product has a convex bending deformation, first push the first push plate and then push the second push plate;

If the product is bent and deformed in a concave shape, first push the second push plate and then push the first push plate.

Beneficial effect

Compared with the related art, in the plastic injection mold of the present invention, the port includes a first port and a second port, the second port is opened at the center of the bottom of the mold cavity, and the first port The port includes at least two ports and is arranged around the second port and is spaced apart from the second port; the lower mold ejector includes at least two first lower ports that match the first port The mold ejector rod and the second lower mold ejector rod matched with the second port, the first lower die ejector rods are inserted into the first port and form a sliding connection, and the second lower die ejector The rod is inserted in the second port and forms a sliding connection; the push plate includes a first push plate and a second push plate, and the first push plate and the second push plate are both spaced from the lower mold Relatively arranged and independent of each other, the first push plate and the second push plate are respectively fixedly connected with the first lower mold ejector pin and the second lower mold ejector pin; after the product is injected in the mold cavity, If the product has a convex bending deformation, first push the first push plate and then push the second push plate. If the product has a concave bending deformation, push the second push plate first and then push the first push plate. Push plate, using the first push plate and the second push plate to push the first lower mold ejector rod and the second lower mold ejector rod to correct the product's inverse warpage deformation, effectively avoiding the ejection of the lower mold ejector rod. When the product is released, the product will be deformed due to shrinkage.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the plastic injection mold of the present invention;

Figure 2 is a cross-sectional view of the three-dimensional structure of the plastic injection molding mold of the present invention when in use.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to Figures 1-2, the present invention provides a plastic injection molding mold 10, which includes an upper mold 1, a lower mold matching the upper mold 2, from the lower mold 1 close to the upper mold 2 One side of the cavity 3 is recessed in the direction away from the upper mold 1, a port 4 that penetrates the bottom of the mold cavity 3 and connects the mold cavity 3 with the outside, is inserted into the port 4 and forms The lower mold push rod 5 is slidably connected and the push plate 6 is fixedly connected with the lower mold push rod 5.

The port 4 includes a first port 41 and a second port 42, the second port 42 is opened in the center of the bottom of the mold cavity 3, the first port 41 includes at least two and a ring It is arranged at the second port 42 and is spaced apart from the second port 42.

In this embodiment, the first port 41 includes two and is located on opposite sides of the second port 42 respectively, and the two first ports 41 are symmetrically arranged with respect to the second port;

The shapes of the first port 41 and the second port 42 are not limited. In this embodiment, the first port 41 and the second port 42 are both square.

The lower mold ejector rod 5 includes at least two first lower mold ejector rods 51 that match the first port 41 and a second lower mold ejector pin 52 that matches the second port 42. The lower mold ejector rods 51 are inserted into the first port 41 to form a sliding connection, and the second lower mold ejector rods 52 are inserted into the second port 42 to form a sliding connection.

The push plate 6 includes a first push plate 61 and a second push plate 62. Both the first push plate 61 and the second push plate 62 are spaced apart from the lower mold 2 and are independent of each other. A push plate 61 is fixedly connected to the first lower mold push rod 51, and the second push plate 62 is fixedly connected to the second lower mold push rod 52.

Further, the end surface of the first lower mold ejector rod 51 away from the lower mold 2 is fixedly connected to the first push plate 61, and the end surface of the second lower mold ejector rod 52 away from the lower mold 2 It is fixedly connected to the second push plate 62, and the second push plate 62 is located between the first push plate 61 and the lower mold 2.

Furthermore, the second push plate 62 is sleeved on the first lower mold push rod 51, and forms a sliding connection with the first lower mold push rod 51. In this embodiment, the first lower mold push rod 51 The mold ejector rods 51 include two and are respectively located on opposite sides of the second lower mold ejector rod 52, and the two first lower mold ejector rods 51 are symmetrically arranged with respect to the second lower mold ejector rod 52.

In this embodiment, when the product 7 is injected in the cavity 3, the lower mold ejector 5 ejects the product 7. At this time, the product will shrink and deform; if the product is convex For bending deformation, first push the first push plate 61 and then push the second push plate 62. If the product has a concave bending deformation, push the second push plate 62 first and then push the first push plate 61, The first push plate 61 and the second push plate 62 are used to respectively push the first lower mold ejector 51 and the second lower mold ejector 52 to correct the product's reverse warpage deformation, which effectively avoids the lower mold ejector. When the product is ejected, the product will be deformed due to shrinkage.

Compared with the related art, in the plastic injection mold of the present invention, the port includes a first port and a second port, the second port is opened at the center of the bottom of the mold cavity, and the first port The port includes at least two ports and is arranged around the second port and is spaced apart from the second port; the lower mold ejector includes at least two first lower ports that match the first port A mold ejector rod and a second lower mold ejector pin matched with the second port, the first lower die ejector pins are respectively inserted into the first port and form a sliding connection, and the second lower die ejector The rod is inserted in the second port and forms a sliding connection; the push plate includes a first push plate and a second push plate, and the first push plate and the second push plate are both spaced from the lower mold Relatively arranged and independent of each other, the first push plate and the second push plate are respectively fixedly connected with the first lower mold ejector pin and the second lower mold ejector pin; after the product is injected in the mold cavity, If the product has a convex bending deformation, first push the first push plate and then push the second push plate. If the product has a concave bending deformation, push the second push plate first and then push the first push plate. Push plate, using the first push plate and the second push plate to respectively push the first lower mold ejector rod and the second lower mold ejector rod to correct the inverse warpage of the product, effectively avoiding the ejection of the lower mold ejector rod When the product is released, the product will be deformed due to shrinkage.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A shaping mold for injection molded parts, comprising an upper mold, a lower mold matched with the upper mold, a cavity formed by recessing from the side of the lower mold close to the upper mold in the direction away from the upper mold, and penetrating the mold cavity. A through port at the bottom of the mold cavity and connecting the mold cavity with the outside world, a lower mold ejector pin inserted in the through port to form a sliding connection, and a push plate fixedly connected to the lower mold ejector, characterized in that ,

The port includes a first port and a second port, the second port is opened at the center of the bottom of the mold cavity, and the first port includes at least two and is ringed at the second port. A port, which is arranged at an interval from the second port;

The lower mold ejector rod includes at least two first lower mold ejector rods matched with the first port and a second lower mold ejector rod matched with the second port. The first lower mold ejector rods Are respectively inserted into the first port and form a sliding connection, and the second lower mold ejector rod is inserted into the second port and forms a sliding connection;

The push plate includes a first push plate and a second push plate. Both the first push plate and the second push plate are arranged opposite to the lower mold at intervals and are independent of each other. The second push plate is respectively fixedly connected with the first lower mold ejector rod and the second lower mold ejector rod.
The plastic injection molding mold according to claim 1, wherein the end surface of the first lower mold ejector rod away from the lower mold is fixedly connected with the first push plate, and the second lower mold ejector rod The end face away from the lower mold is fixedly connected to the second push plate, and the second push plate is located between the first push plate and the lower mold.
The plastic injection molding mold according to claim 2, wherein the second push plate is sleeved on the first lower mold ejector pin, and forms a sliding connection with the first lower mold ejector pin.
The plastic injection molding mold according to claim 1, wherein the first through opening includes two and is respectively located on opposite sides of the second through opening.
The plastic injection molding mold according to claim 4, wherein the two first ports are symmetrically arranged with respect to the second ports.
The plastic injection molding mold according to claim 1, wherein the first port and the second port are both square.
A method for using a plastic injection mold for plastic parts according to any one of claims 1-6, wherein the method comprises the following steps:

The material flow is injected into the mold cavity through an injection molding machine, and the material flow is solidified to form a product located in the mold cavity; the upper mold and the lower mold are opened, the first push plate and the second push The plate pushes the first lower mold ejector rod and the second lower mold ejector rod respectively, and the first lower mold ejector rod and the second lower mold ejector rod eject the product in the mold cavity ；

When the first lower mold ejector pin and the second lower mold ejector pin eject the product:

If the product has a convex bending deformation, first push the first push plate and then push the second push plate;

If the product is bent and deformed in a concave shape, first push the second push plate and then push the first push plate.