CN219294582U

CN219294582U - Pendant injection mold with prevent scraping structure

Info

Publication number: CN219294582U
Application number: CN202223132969.3U
Authority: CN
Inventors: 李凤山; 李棠明; 欧永星
Original assignee: Zhongshan Pacific Master Precision Injection Ltd
Current assignee: Zhongshan Pacific Master Precision Injection Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-07-04
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a pendant injection mold with an anti-back scraping structure, which comprises an upper mold component and a lower mold component which is matched with the upper mold component to form a cavity, wherein the depth of the cavity is changed from shallow to deep from front to back, the lower mold component is provided with the anti-back scraping structure, the anti-back scraping structure comprises a first thimble, a second thimble and a third thimble, the first thimble, the second thimble and the third thimble can move upwards from the bottom of the cavity to push the blank mold, the first thimble is positioned on the central axis of the cavity, and the second thimble and the third thimble are symmetrically arranged relative to the central axis of the cavity. This pendant injection mold with prevent scraping structure is through forming the first thimble, second thimble and the third thimble of the ejecting working face of triangle in work piece bottom, and the atress is even when making the work piece move up, move up steadily, avoids taking place to control or the ascending side turning on one's side of fore-and-aft direction, avoids the damage of work piece.

Description

Pendant injection mold with prevent scraping structure

Technical Field

The utility model relates to an injection mold, in particular to a pendant injection mold with an anti-back scraping structure.

Background

The injection mold ejects the workpiece through an ejection mechanism after the workpiece is molded, and the existing ejection mechanism consists of an ejection column positioned in the middle of a mold cavity and an air cylinder for driving the ejection column to move up and down. When the ejected workpiece is thin in front and thick in back, the workpiece is easy to be damaged due to side turning in front-back or left-right directions due to uneven stress.

Disclosure of Invention

The utility model aims to provide a pendant injection mold with an anti-scraping structure, which aims to solve the technical problem that front-back or left-right side turning over easily occurs and damage is caused when a front thin and rear thick workpiece is demolded.

The utility model is realized by the following technical scheme:

the utility model provides a pendant injection mold with prevent scraping structure, includes the mould subassembly and with go up the lower mould subassembly that the mould subassembly cooperation formed the die cavity, the degree of depth of die cavity is from preceding back by shallow to become dark, lower mould subassembly has prevents scraping structure, prevent scraping structure including can follow the die cavity bottom upwards removes first thimble, second thimble and the third thimble of pushing away the embryo mould, first thimble is located on the axis of die cavity, the second thimble with the third thimble is about the axis symmetry setting of die cavity.

Further, the connecting lines of the first thimble, the second thimble and the third thimble are equilateral triangles symmetrically arranged relative to the central axis of the cavity.

Further, the second thimble and the third thimble are positioned in front of the first thimble.

Further, one sides of the first thimble, the second thimble and the third thimble, which are propped against the blank mold, are all planes.

Further, one sides of the first thimble, the second thimble and the third thimble, which are propped against the blank mold, are positioned on the same horizontal plane.

Further, the area of the triangle formed by the connecting lines of the first thimble, the second thimble and the third thimble accounts for 1/4-1/3 of the cross section area of the cavity.

Further, the cross section area of one end of the first thimble, which is abutted against the blank mold, is reduced from top to bottom; and/or the cross section area of one end of the second thimble, which is propped against the blank mould, is reduced from top to bottom; and/or the cross section area of one end of the third thimble, which is propped against the blank mould, is reduced from top to bottom.

Further, the cavity is provided with a boss protruding upwards from the cavity bottom, the cavity is provided with an injection molding runner extending around the circumference of the boss, and the first thimble, the second thimble and the third thimble are arranged on the boss.

Further, the injection molding runner is symmetrically arranged relative to the central axis of the cavity, the overflow area is changed from front to back to be large, the second thimble and the third thimble are positioned in front of the first thimble, and the second thimble and the third thimble are respectively adjacent to the injection molding runner.

Further, the second thimble and the third thimble are positioned in the middle of the boss, and the first thimble is positioned at the rear end of the boss.

Compared with the prior art, the utility model has the following advantages:

this pendant injection mold with prevent scraping structure is through forming the first thimble, second thimble and the third thimble of the ejecting working face of triangle in work piece bottom, and the atress is even when making the work piece move up, move up steadily, avoids taking place to control or the ascending side turning on one's side of fore-and-aft direction, avoids the damage of work piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

Fig. 1 is a perspective view of a pendant injection mold with an anti-back-scratch structure disclosed in an embodiment;

FIG. 2 is a perspective view of a lower die assembly in an embodiment;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a top view of a lower die assembly in an embodiment;

FIG. 5 is a partial enlarged view at B in FIG. 4;

FIG. 6 is a perspective view of a first ejector pin according to one embodiment;

fig. 7 is a workpiece formed by a pendant injection mold with an anti-back-scratch structure according to an embodiment of the present disclosure.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: as shown in fig. 1-7, the pendant injection mold with the anti-back scraping structure comprises an upper mold assembly 1 and a lower mold assembly 3 which is matched with the upper mold assembly 1 to form a cavity 2, the depth of the cavity 2 is changed from shallow to deep from front to back, the lower mold assembly 3 is provided with an anti-back scraping structure 4, the anti-back scraping structure 4 comprises a first thimble 41, a second thimble 42 and a third thimble 43 which can move upwards from the bottom of the cavity 2 to push the blank mold, the first thimble 41 is positioned on the central axis of the cavity 2, and the second thimble 42 and the third thimble 43 are symmetrically arranged about the central axis of the cavity 2. During demolding, the anti-falling scraping structure 4 is matched with an ejection mechanism in the lower die assembly 3, and as the first ejector pin 41, the second ejector pin 42 and the third ejector pin 43 move upwards synchronously along with the ejection mechanism, an ejection acting surface with uniform stress is formed at the bottom of a workpiece, so that the workpiece stably moves upwards to finish demolding, and side turning in the left-right or front-rear direction is avoided when the front thin and rear thick workpiece is demolded, so that damage to the workpiece is avoided.

In one embodiment, in order to make the stress of the first thimble 41, the second thimble 42, and the third thimble 43 more uniform when acting on the bottom of the workpiece, the workpiece moves upward more stably, and the connection lines of the first thimble 41, the second thimble 42, and the third thimble 43 are equilateral triangles symmetrically arranged about the central axis of the cavity 2.

In one embodiment, in order to make the stress of the first thimble 41, the second thimble 42, and the third thimble 43 more uniform when they act on the bottom of the workpiece, the workpiece moves upward more stably, the second thimble 42 and the third thimble 43 are located in front of the first thimble 41, specifically, the second thimble 42 and the third thimble 43 are located in front of the first thimble 41, and the first thimble 41 is located behind the second thimble 41.

In one embodiment, in order to make the first thimble 41, the second thimble 42, and the third thimble 43 better fit to the bottom of the workpiece, make the stress of the workpiece more uniform, and make the workpiece move upward more stably, the sides of the first thimble 41, the second thimble 42, and the third thimble 43 abutting against the blank mold are all plane surfaces.

In one embodiment, in order to make the first thimble 41, the second thimble 42, and the third thimble 43 better fit to the bottom of the workpiece, make the stress of the workpiece more uniform, and make the workpiece move upward more stably, one sides of the first thimble 41, the second thimble 42, and the third thimble 43, which are abutted against the blank mold, are located on the same horizontal plane.

In one embodiment, in order to make the first ejector pin 41, the second ejector pin 42 and the third ejector pin 43 better fit to the bottom of the workpiece, make the stress of the workpiece more uniform and make the workpiece move upwards more stably, the area of the triangle formed by connecting the first ejector pin 41, the second ejector pin 42 and the third ejector pin 43 occupies 1/4-1/3 of the cross-sectional area of the cavity 2.

In one embodiment, in order to improve the deformation resistance of the first ejector pin 41, the second ejector pin 42, and the third ejector pin 43, the cross-sectional area of the end of the first ejector pin 41 abutting against the blank mold is reduced from top to bottom, the cross-sectional area of the end of the second ejector pin 42 abutting against the blank mold is reduced from top to bottom, and the cross-sectional area of the end of the third ejector pin 43 abutting against the blank mold is reduced from top to bottom.

In one embodiment, for simplifying the structure and facilitating implementation, the cavity 2 is provided with a boss 5 protruding upwards from the bottom of the cavity, the cavity 2 is provided with an injection runner 21 extending circumferentially around the boss 5, and the first thimble 41, the second thimble 42 and the third thimble 43 are disposed on the boss 5.

In one embodiment, in order to make the first thimble 41, the second thimble 42, and the third thimble 43 better attach to the bottom of the workpiece, make the stress of the workpiece more uniform, and make the workpiece move upward more stably, the injection runner 21 is symmetrically disposed about the central axis of the cavity 2, and the flow area is changed from front to back from small to large, the second thimble 42 and the third thimble 43 are located in front of the first thimble 41, and the second thimble 42 and the third thimble 43 are both adjacent to the injection runner 21.

In one embodiment, in order to make the first thimble 41, the second thimble 42, and the third thimble 43 better fit to the bottom of the workpiece, make the stress of the workpiece more uniform, and make the workpiece move upward more stably, the second thimble 42 and the third thimble 43 are located in the middle of the boss 5, and the first thimble 41 is located at the rear end of the boss 5.

It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the utility model. Furthermore, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present utility model and simplifying the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The foregoing description of one or more embodiments provided in connection with the specific disclosure is not intended to limit the practice of the utility model to such description. Any approximation, or substitution of the technical deduction or substitution made for the technical deduction of the present utility model based on the inventive method, structure, etc. shall be considered as protection of the present utility model.

Claims

1. The utility model provides a pendant injection mold with prevent scraping structure, includes the mould subassembly and with go up the lower mould subassembly that the mould subassembly cooperation formed the die cavity, a serial communication port, the degree of depth of die cavity is from the front to the back by shallow change, lower mould subassembly has prevents scraping structure, prevent scraping structure including can follow the die cavity bottom upwards removes first thimble, second thimble and the third thimble of pushing away the embryo mould, first thimble is located on the axis of die cavity, the second thimble with the third thimble is about the axis symmetry setting of die cavity.

2. The pendant injection mold with the anti-back-scraping structure according to claim 1, wherein the connecting lines of the first thimble, the second thimble and the third thimble are equilateral triangles symmetrically arranged about the central axis of the cavity.

3. The pendent injection mold with the anti-backup feature of claim 1 wherein the second and third pins are located in front of the first pin.

4. The pendant injection mold with the anti-back-scraping structure according to claim 1, wherein one side of the first thimble, the second thimble and the third thimble, which are propped against the blank mold, is a plane.

5. The pendent injection mold with the anti-backup structure according to claim 4, wherein the sides of the first, second and third pins against the blank mold are located on the same horizontal plane.

6. The pendant injection mold with the anti-back-scraping structure according to claim 1, wherein the area of a triangle formed by connecting the first thimble, the second thimble and the third thimble accounts for 1/4-1/3 of the cross-sectional area of the cavity.

7. The pendant injection mold with the anti-back-scraping structure according to claim 1, wherein the cross-sectional area of one end of the first ejector pin, which abuts against the blank mold, is reduced from top to bottom;

and/or the cross section area of one end of the second thimble, which is propped against the blank mould, is reduced from top to bottom;

and/or the cross section area of one end of the third thimble, which is propped against the blank mould, is reduced from top to bottom.

8. The pendant injection mold with the anti-back-scraping structure according to any one of claims 1-7, wherein a boss is protruding upwards from a cavity bottom of the cavity, the cavity is provided with an injection runner extending circumferentially around the boss, and the first thimble, the second thimble and the third thimble are arranged on the boss.

9. The pendant injection mold with the anti-back-scraping structure according to claim 8, wherein the injection runner is symmetrically arranged about a central axis of the cavity, the overflow area is changed from front to back to be large, the second thimble and the third thimble are positioned in front of the first thimble, and the second thimble and the third thimble are respectively adjacent to the injection runner.

10. The pendent injection mold with the anti-back-scraping structure according to claim 9, wherein the second thimble and the third thimble are located in the middle of the boss, and the first thimble is located at the rear end of the boss.