CN219543781U

CN219543781U - Plastic mold front mold back-off small-space demolding structure

Info

Publication number: CN219543781U
Application number: CN202320158401.4U
Authority: CN
Inventors: 黄强; 王伟
Original assignee: Outang Technology Shenzhen Co ltd
Current assignee: Outang Technology Shenzhen Co ltd
Priority date: 2023-01-16
Filing date: 2023-01-16
Publication date: 2023-08-18
Anticipated expiration: 2033-01-16

Abstract

The utility model discloses a plastic mold front mold back-off small-space demolding structure, wherein an ejector insert is arranged on an ejector plate of a mold, four elastic parts are arranged at the top end of the ejector insert, a sleeve sleeved on the ejector insert is fixed on a mold core of the mold, and the ejector plate of the mold can drive the ejector insert to move to the four elastic parts in the sleeve to fold the four elastic parts. The ejection insert is hollow, a thimble is arranged in the ejection insert, and the bottom end of the thimble is also fixed on an ejection plate of the die. The utility model has the beneficial effects that: the elastic part of the ejection insert slides into the sleeve to be folded, so that the die assembly is realized. During the drawing of patterns, ejecting mold insert is driven to ejecting with the product, and four elasticity portions can slide out the sleeve gradually and open, take off the back-off when realizing ejecting the product, and overall structure is simple, can satisfy the drawing of patterns at little space back-off position, can not appear strong drawing of patterns and the problem of strain product, and drawing of patterns efficiency is high. In addition, can also change different thimble and realize the jack catch of different pliability of shaping.

Description

Plastic mold front mold back-off small-space demolding structure

Technical Field

The utility model relates to the technical field of plastic molds, in particular to a front mold back-off small-space demolding structure of a plastic mold.

Background

When a plastic mold forms a product, a reverse buckle structure is usually arranged on the product, and the conventional practice in the industry is to perform side slide core pulling or strong demolding. However, some products have the back-off arranged circumferentially, and the space between the back-off and the product surface is small, if the structure of pulling core at the side position is very complex, and there is not enough space for the side position to be ejected, if the die is strongly ejected, the die is easy to be damaged due to the material of the product.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides a plastic mold front mold back-off small-space demolding structure.

In order to achieve the above purpose, the plastic mold front mold back-off small-space demolding structure provided by the utility model comprises: the product of shaping in the mould die cavity is equipped with the jack catch on the surface of product, and the jack catch includes four trip along circumference direction interval arrangement, and the back-off of trip is established on the outer wall at top edge. The ejector plate of the die is provided with an ejector insert inserted into the die cavity, the top end of the ejector insert is provided with elastic parts corresponding to the four hooks one by one, and the elastic parts form the outer walls of the hooks and gaps between two adjacent hooks. The mold core of the mold is fixedly provided with a sleeve sleeved on the ejection insert, and the ejection plate of the mold can drive the ejection insert to move to the four elastic parts in the sleeve so as to fold the four elastic parts. The ejection insert is hollow, a thimble used for forming the inner cavity of the claw is arranged in the ejection insert, and the bottom end of the thimble is also fixed on the ejection plate of the die.

Preferably, the elastic portion is integrally formed at the top end of the ejection insert, and the wall thickness of the bottom end of the elastic portion is smaller than the wall thickness of the top end thereof.

Preferably, step notches are formed on two side walls of the bottom end of the elastic part.

Preferably, the connection parts of the bottom ends of the two adjacent elastic parts are connected by U-shaped grooves.

Preferably, a counterbore is provided at the bottom end opening of the sleeve.

Compared with the prior art, the utility model has the beneficial effects that: by arranging the ejection insert on the ejection plate of the die, when the elastic part of the ejection insert slides into the sleeve to be folded, the die assembly molding product is realized. During demolding, the product is ejected only by driving the ejection insert through the ejection plate, in the ejection process, the four elastic parts can gradually slide out of the sleeve and are opened, the product is ejected and the inverted buckle is removed, the whole structure is simple, the demolding of the inverted buckle position in a small space can be met, the problem that the product is damaged due to strong demolding can be avoided, and the demolding efficiency is high. In addition, through the inner cavity that adopts thimble shaping jack catch, during the drawing of patterns, the thimble also can play the ejecting effect of product. The ejector pins with different lengths or diameters can be replaced as required, so that the glue thickness of the inner cavity of the forming claw is realized, the flexibility of the claw is regulated, and the regulation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a product;

FIG. 2 is a cross-sectional view of a molded product according to an embodiment of the present utility model;

FIG. 3 is a perspective view of an insert with the resilient portion of the insert closed in accordance with one embodiment of the present utility model;

FIG. 4 is a perspective view of an ejector insert of an embodiment of the present utility model with the spring portion open;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The utility model provides a plastic mold front mold back-off small-space demolding structure.

Referring to fig. 1 to 4, fig. 1 is a structural view of a product, fig. 2 is a sectional view of a molded product according to an embodiment of the present utility model, fig. 3 is a perspective view of an elastic portion of an ejection insert according to an embodiment of the present utility model when the elastic portion is closed, and fig. 4 is a perspective view of an ejection insert according to an embodiment of the present utility model when the elastic portion is opened.

As shown in fig. 1-4, in an embodiment of the present utility model, the plastic mold front mold back-off small space demolding structure includes: the product 1 in the mould cavity is formed, a claw is arranged on the surface of the product 1 and comprises four clamping hooks 2 which are arranged at intervals along the circumferential direction, and a back-off 3 of the clamping hooks 2 is arranged on the outer wall of the edge of the top end. The ejector plate of the die is provided with an ejector insert 4 inserted into the die cavity, the top end of the ejector insert 4 is integrally provided with elastic parts 5 corresponding to the four hooks 2 one by one, the elastic parts 5 form gaps between the outer walls of the hooks 2 and two adjacent hooks 2, and the wall thickness of the bottom end of the elastic part 5 is smaller than the wall thickness of the top end of the elastic part, so that the elastic part 5 is ensured to have enough elasticity. Step notches 6 are formed on two side walls of the bottom end of the elastic part 5 so as to further improve the elasticity of the elastic part 5. The mold core of the mold is fixedly provided with a sleeve 7 sleeved on the ejection insert 4, when the ejection plate of the mold drives the ejection insert 4 to move to the position that the four elastic parts 5 are positioned in the sleeve 7, the four elastic parts 5 are folded under the constraint of the sleeve 7, when the ejection insert 4 ejects the product 1 upwards, the four elastic parts 5 are gradually separated from the sleeve 7, and the four elastic parts 5 can be slowly opened under the action of self elastic force to realize the back-off 3. The connection parts of the bottom ends of the two adjacent elastic parts 5 are connected by U-shaped grooves 8, so as to prevent the elastic parts 5 from losing elasticity due to internal stress cracking when repeatedly folding and unfolding. The bottom end opening part of the sleeve 7 is provided with a reaming 9, so that the four elastic parts 5 can be conveniently penetrated out of the sleeve 7 when the ejection insert 4 is assembled. The ejection insert 4 is hollow, a thimble 10 used for forming the inner cavity of the claw is arranged in the ejection insert 4, and the bottom end of the thimble 10 is also fixed on an ejection plate of the die.

According to the technical scheme of the utility model, the ejection insert 4 is arranged on the ejection plate of the die, and when the elastic part 5 of the ejection insert 4 slides into the sleeve 7 to be folded, the die assembly forming product 1 is realized. During demolding, the product 1 is ejected only by driving the ejection insert 4 through the ejection plate, in the ejection process, the four elastic parts 5 can gradually slide out of the sleeve 7 and are opened, the inverted buckle 3 is released when the product 1 is ejected, the whole structure is simple, the demolding of the inverted buckle 3 positions in a small space can be met, the problem that the product 1 is pulled due to strong demolding can not occur, and the demolding efficiency is high. In addition, through the inner cavity of the claw formed by the ejector pin 10, the ejector pin 10 can also play a role in ejecting the product 1 during demolding. The ejector pins 10 with different lengths or diameters can be replaced as required, so that the glue thickness of the inner cavity of the forming claw is realized, the flexibility of the claw is regulated, and the regulation is convenient.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A plastic mold front mold back-off small space demolding structure, comprising: the product is formed in the die cavity, the surface of the product is provided with a claw, the claw comprises four clamping hooks which are arranged at intervals along the circumferential direction, and the reverse buckle of the clamping hooks is arranged on the outer wall of the edge of the top end; the mold is characterized in that an ejection insert inserted into a mold cavity is arranged on an ejection plate of the mold, elastic parts which are in one-to-one correspondence with four clamping hooks are arranged at the top end of the ejection insert, and the elastic parts form the outer walls of the clamping hooks and gaps between two adjacent clamping hooks; a sleeve sleeved on the ejection insert is fixed on a die core of the die, and an ejection plate of the die can drive the ejection insert to move to the four elastic parts in the sleeve so as to fold the four elastic parts; the ejector insert is hollow, a thimble used for forming the inner cavity of the claw is arranged in the ejector insert, and the bottom end of the thimble is also fixed on an ejector plate of the die.

2. The plastic mold front mold back-off small space demolding structure according to claim 1, wherein the elastic portion is integrally formed at the top end of the ejection insert, and the wall thickness of the bottom end of the elastic portion is smaller than the wall thickness of the top end of the elastic portion.

3. The plastic mold front mold back-off small-space demolding structure according to claim 1, wherein step notches are formed on two side walls of the bottom end of the elastic portion.

4. The plastic mold front mold back-off small-space demolding structure according to claim 1, wherein the connection parts of the bottom ends of the two adjacent elastic parts are connected by a U-shaped groove.

5. The plastic mold front mold back-off small space demolding structure according to any one of claims 1 to 4, wherein a bottom end opening of the sleeve is provided with a reaming.