Separating and descending type ejection demolding structure for clamping hook special-shaped piece

Abstract

The utility model relates to the technical field of injection molds, in particular to a separation descending type ejection demolding structure for a clamping hook special-shaped piece. The injection mold comprises an injection mold, a mold core arranged in the injection mold, an injection molding cavity arranged in the mold core and a demolding assembly arranged in the mold core and used for jacking the injection molding cavity, and the demolding assembly comprises an ejector pin jacking the injection molding cavity and an angle pin assembly arranged beside the ejector pin and used for jacking the injection molding cavity. The angle pin assembly comprises an angle pin body and an angle pin descending insert which is installed on the angle pin body in a sliding mode and arranged on the top of the angle pin body. Compared with the prior art, the angle pin has the advantages that interference in the movement process is completely avoided by arranging the angle pin body and the angle pin head in the ejection process through simple separation descending type two-section type angle pin treatment, the problem that a product cannot be ejected and demolded through a mold sliding block and other mechanisms is solved, and the mechanical structure is simple, stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a snap-hook shaped part separation and lowering ejection demolding structure. Background Technology

[0002] Currently, most ordinary plastic parts are manufactured using injection molding, which results in relatively simple mold designs. However, it is very difficult to mold plastic parts with internal hooks using traditional injection molding. The internal hooks of plastic parts are not easy to demold, the mold structure is complex, the cost is high, demolding is difficult, and the mold opening stroke is long, which is not conducive to mass production of products.

[0003] Existing technology, CN201821366359.0, describes a molding die for manufacturing plastic parts with inner hooks. The existing die's demolding structure is not compatible with the attached... Figure 1 For the product components in the existing technology, the upper surface of the product is a horizontal structure, so this surface will be interfered with during demolding. Furthermore, the hooks are set from the middle downwards, so it is impossible to demold the existing structure.

[0004] Therefore, it is necessary to design a hook-type irregular part separation and lowering ejection demolding structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a snap-hook shaped part separation and lowering ejection demolding structure to overcome the above-mentioned shortcomings of the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A snap-hook shaped part separation and lowering ejection demolding structure includes an injection mold, a mold core placed in the injection mold, an injection cavity placed in the mold core, and a demolding assembly placed in the mold core and used to support the injection cavity. The demolding assembly includes an ejector pin supporting the injection cavity and a slanted pin assembly placed beside the ejector pin and used to support the cavity. The slanted pin assembly includes a slanted pin body and a slanted pin lowering insert slidably mounted to the slanted pin body and placed on top of the slanted pin body. A dovetail groove is formed at the bottom of the slanted pin lowering insert, and a dovetail slider is formed at the top of the slanted pin body. A limiting groove is formed at the top of the slanted pin body, and an installation groove is formed on the slanted pin lowering insert. A stop block for the slanted pin lowering insert is installed in the installation groove, and the stop block passes through the slanted pin lowering insert, with its lower half placed in the limiting groove.

[0008] Preferably, the mounting groove is filled with a copper plug.

[0009] Preferably, the contact surface between the inclined pin descending insert and the inclined pin body is an inclined surface.

[0010] The beneficial effects of this utility model are: by setting the inclined pin body and the inclined pin head in the ejection process, and using a simple separation and descent two-section inclined pin, the interference in the movement process is completely avoided, and the problem of the mold slider and other mechanisms being unable to eject and demold the product is solved. The mechanical structure is simple, stable and reliable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a hook-shaped part separation and lowering ejection demolding structure according to the present invention;

[0012] Figure 2 This is a second-view schematic diagram of a hook-shaped part separation and lowering ejection demolding structure according to the present invention;

[0013] Figure 3 This is a schematic diagram of the flipping mechanism of the hook-shaped part separation and lowering ejection demolding structure of this utility model;

[0014] Figure 4 This is a demolding process diagram of a hook-shaped part separation and lowering ejection demolding structure according to the present invention;

[0015] In the diagram: 1. Injection molded part; 3. Angled pin body; 2. Angled pin descending insert; 6. Ejector pin; 21. Dovetail slide; 31. Dovetail slider; 32. Limiting groove; 4. Angled pin descending insert stop block; 5. Copper plug. Detailed Implementation

[0016] Reference Figure 1 The injection molded part 1 in the prior art has a structure that is mainly similar to an L-shaped structure, and also has a protruding hook structure extending from the end.

[0017] refer to Figure 2 , 4 A snap-hook shaped part separation and lowering ejection demolding structure includes an injection mold, a mold core placed in the injection mold, an injection cavity placed in the mold core, and a demolding component placed in the mold core and used to hold the injection cavity.

[0018] The demolding assembly includes an ejector pin 6 that holds the injection cavity, and a slanted pin assembly located beside the ejector pin and used to hold the cavity.

[0019] The inclined pin assembly includes an inclined pin body 3 and an inclined pin descending insert 2 that is slidably mounted to the inclined pin body 3 and placed on top of the inclined pin body;

[0020] To facilitate the sliding connection between the inclined pin lowering insert and the inclined pin body, a dovetail groove 21 is provided at the bottom of the inclined pin lowering insert 2, and a dovetail slider 31 is provided at the top of the inclined pin body 3. The connection is achieved by engaging the dovetail groove at the bottom of the inclined pin lowering insert with the dovetail slider at the top of the inclined pin body.

[0021] Furthermore, to further limit the sliding position between the inclined pin lowering insert 2 and the inclined pin body, and to facilitate future reuse and installation, a limiting groove 32 is formed on the top of the inclined pin body 3. An installation groove is formed on the inclined pin lowering insert, and an inclined pin lowering insert stop block 4 is installed in the installation groove. The inclined pin lowering insert stop block is set through the inclined pin lowering insert, and its lower half is placed in the limiting groove 32. In order to effectively seal the installation groove and limit the inclined pin lowering insert stop block, a copper plug 5 is filled in the installation groove. By setting the inclined pin lowering insert stop block and placing the inclined pin lowering insert stop block in the limiting groove at the top of the inclined pin body, the limiting is achieved. If the inclined pin body moves, the inclined pin lowering insert stop block will abut against one side of the inner wall of the limiting groove to achieve the limiting function.

[0022] In order to work in conjunction with the locking hook of the cavity, the inclined pin descending insert and the inclined pin body are set to support the locking hook part, while the top is square in structure and is set to support the bottom of the entire cavity and the side of the locking hook, thus providing support for the cavity.

[0023] To facilitate the separation of the inclined pin lowering insert and the inclined pin body, the contact surface between the inclined pin lowering insert and the inclined pin body is an inclined surface.

[0024] refer to Figure 4 The implementation process is as follows: the inclined pin descending insert is connected to the inclined pin body with a dovetail groove. The inclined pin descending insert stop block is assembled, and then the copper plug is installed. Then, the product shape is processed by injection molding. In the specific mold opening process, when the inclined pin body is ejected, the inclined pin descending insert is connected to the inclined pin body with a dovetail groove. During the movement of the inclined pin body, the inclined pin descending insert descends during the ejection process, and the direction of the inclined pin movement does not interfere. When the inclined pin body is completely separated from the product hook and buckle, the descending insert stop block has not yet touched the limiting groove of the descending insert stop block. The inclined pin continues to move. When the descending insert stop block touches the limiting groove of the descending insert stop block, the inclined pin will stop moving, and the ejector pin will eject the product.

[0025] The advantages of this utility model are that, by setting the inclined pin body and the inclined pin head in the ejection process, and using a simple separation and downward two-section inclined pin, interference in the movement process is completely avoided, and the problem of the mold slider and other mechanisms being unable to eject and demold the product is solved. The mechanical structure is simple, stable and reliable.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A snap-hook shaped part separation and lowering ejection demolding structure, comprising an injection mold, a mold core placed within the injection mold, an injection cavity placed within the mold core, and a demolding assembly placed within the mold core and used to support the injection cavity, the demolding assembly comprising an ejector pin supporting the injection cavity and a slanted pin assembly placed beside the ejector pin and used to support the cavity, characterized in that: The inclined pin assembly includes an inclined pin body and an inclined pin descending insert that is slidably mounted to the inclined pin body and placed on top of the inclined pin body. A dovetail groove is provided at the bottom of the inclined pin descending insert, and a dovetail slider is provided at the top of the inclined pin body. A limiting groove is provided at the top of the inclined pin body, and an installation groove is provided on the inclined pin descending insert. An inclined pin descending insert stop block is installed in the installation groove, and the inclined pin descending insert stop block passes through the inclined pin descending insert, with its lower half placed in the limiting groove.

2. The hook-shaped part separation and lowering ejection demolding structure according to claim 1, characterized in that: The mounting slot is filled with a copper plug.

3. The hook-shaped part separation and lowering ejection demolding structure according to claim 1, characterized in that: The contact surface between the inclined pin descending insert and the inclined pin body is an inclined surface.

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