CN219256352U

CN219256352U - Secondary demolding structure for injection mold

Info

Publication number: CN219256352U
Application number: CN202223572640.9U
Authority: CN
Inventors: 郭志敏; 马嘉明; 吴育苗; 李尚原; 郭启彬; 朱志强; 陈志升; 林嘉辉; 张武
Original assignee: Guangzhou Haoshun Mould Technology Co ltd
Current assignee: Guangzhou Haoshun Mould Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-27
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a secondary demoulding structure for an injection mould, which comprises a fixed mould and a movable mould which are matched with each other; the fixed die comprises a panel and a fixed die plate, wherein the lower end of the panel is provided with a heat insulation plate, the upper end of the panel is provided with a hot runner plate, the hot runner plate is provided with the fixed die plate, and a front die is arranged in the fixed die plate; the movable mould comprises a movable mould plate, a rear membrane is arranged in the movable mould plate, and a rear mould insert is arranged in the rear mould; the ejector pin passes through the movable mould plate and the movable mould insert, two ejection inserts are further arranged in the movable mould insert, a spring is further sleeved on the ejector pin at the position of the ejection insert, one end of the spring is abutted with the ejection insert, and the other end of the spring is abutted with the movable mould plate. According to the utility model, the ejection insert is driven to move through the elasticity of the spring to restore the original state, so that a product is ejected, and the product is separated from the rear die insert; then the ejector pin is controlled to move continuously, and under the action of the ejector pin, the back-off position is deformed outwards to forcedly degum, so that the secondary demoulding action is completed; the external mechanical button machine is avoided, so that the cost of the die is reduced.

Description

Secondary demolding structure for injection mold

Technical Field

The utility model relates to the technical field of molds, in particular to a secondary demolding structure for an injection mold.

Background

The mold is mainly used for injection molding products, however, some product structures have back-off, so that the product needs to be subjected to secondary demolding treatment after injection molding.

In the prior art, a mold structure usually adopts a secondary ejection structure to realize secondary demolding, an external mechanical button machine is required to be designed for realizing the demolding mold structure by using secondary ejection, and in addition, a set of ejector pin plate is required to be added for realizing secondary demolding.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a secondary demoulding structure for an injection mould.

The technical scheme of the utility model is as follows: the secondary demolding structure for the injection mold comprises a fixed mold and a movable mold which are matched with each other; the fixed die comprises a panel, a hot runner plate and a fixed die plate, wherein the lower end of the panel is provided with a heat insulation plate, the upper end of the panel is provided with the hot runner plate, the fixed die plate is arranged on the hot runner plate, a cavity is formed in the fixed die plate, and a front die is arranged in the cavity;

the movable mould comprises a movable mould plate, a groove is formed in the movable mould plate, a rear membrane is arranged in the groove, a rear mould insert is arranged in the rear mould, and the rear membrane is matched with the rear mould insert;

the movable template is symmetrically provided with supporting plates, and the supporting plates are provided with bottom plates;

an ejector plate and an ejector pin bottom plate are further arranged between the two support plates, a plurality of ejector pins are arranged on the ejector plate, the ejector pins penetrate through the movable die plate and the movable die insert, two ejection inserts are further arranged in the movable die insert, and the ejection inserts correspond to the back-off positions of products; the ejector pin passes through the ejection insert, and a spring is sleeved on the ejector pin at the position of the ejection insert, one end of the spring is abutted with the ejection insert, and the other end of the spring is abutted with the movable mould plate.

Preferably, the ejector pin plate and the ejector pin bottom plate are provided with supporting columns in a penetrating manner, the upper ends of the supporting columns are connected with the bottom plate through bolts, and the lower ends of the supporting columns are abutted with the movable mould plate.

Preferably, the lower end of the thimble plate is also provided with a plurality of return pins, and the return pins are inserted into the movable mould plate downwards.

Preferably, the lower end of the bottom plate is also provided with a middle bracket, and the middle bracket is downwards inserted into the thimble bottom plate, the thimble plate and the movable template in sequence.

Preferably, the panel is provided with a guide post, the guide post passes through the hot runner plate, the fixed die plate and the movable die plate upwards in sequence, the guide post is also provided with a plurality of guide sleeves, and the hot runner plate, the fixed die plate and the movable die plate are respectively arranged on the guide post through the corresponding guide sleeves.

Preferably, the hot runner plate is further provided with a plurality of runners.

Preferably, the lower end of the thimble bottom plate is also provided with a plurality of inclined jacks, and the inclined jacks penetrate through the thimble plate, the movable template and the movable die insert in sequence.

The beneficial effects of the utility model are as follows:

1. the utility model has simple structure and strong practicability, and the ejection insert is driven to move by 5mm through the elasticity of the spring to restore the original state, so that the product is ejected, and the product is separated from the rear die insert; then the ejector pin is controlled to move continuously, and the back-off position is deformed outwards to forcedly degum under the action of the ejector pin force so as to finish the action of secondary demolding;

2. the utility model avoids using an external mechanical button machine, thereby reducing the cost of the die.

Drawings

FIG. 1 is a schematic diagram of a mold structure according to the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the mold of the present utility model;

FIG. 3 is a schematic diagram of a mold according to the present utility model;

FIG. 4 is a schematic diagram of a mold according to the present utility model;

FIG. 5 is a schematic diagram of a mold according to the present utility model;

FIG. 6 is a schematic diagram of a mold according to the present utility model;

FIG. 7 is a schematic view of the structure of an ejection insert of the present utility model;

FIG. 8 is a schematic view of a thermal flow plate according to the present utility model;

FIG. 9 is a schematic diagram of the structure of the product of the present utility model;

FIG. 10 is a schematic diagram of a comparative structure of the present utility model, before and after first demolding;

in the figure, a 1-fixed die and a 2-movable die; 3-supporting columns; 4-needle return; 5-middle tositude; 6-guide posts and 7-guide sleeves; 8-flow channels; 9-pitched roof; 10-product;

11-face plate, 12-hot runner plate, 13-fixed die plate, 14-heat insulation plate and 15-front die;

21-moving die plate, 22-back film, 23-back die insert and 24-supporting plate; 25-a bottom plate; 26-ejector pins, 27-ejector pin base plates, 28-ejector pins, 29-ejector inserts and 30-springs; 31-back-off.

Detailed Description

The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:

as shown in fig. 1 to 6, the embodiment provides a secondary demolding structure for an injection mold, which comprises a fixed mold 1 and a movable mold 2 which are matched with each other; the fixed die 1 comprises a panel 11, a hot runner plate 12 and a fixed die plate 13, wherein the lower end of the panel 11 is provided with a heat insulation plate 14, the upper end of the panel 11 is provided with the hot runner plate 12, the hot runner plate 12 is provided with the fixed die plate 13, the fixed die plate 13 is provided with a die cavity, and the die cavity is internally provided with a front die 15; the movable die 2 comprises a movable die plate 21, a groove is formed in the movable die plate 21, a rear film 22 is arranged in the groove, a rear die insert 23 is arranged in the rear film 22, and the rear film 22 is matched with the rear die insert 23; the movable template 21 is symmetrically provided with a supporting plate 24, and the supporting plate 24 is provided with a bottom plate 25; an ejector plate 26 and an ejector bottom plate 27 are further arranged between the two support plates 24, a plurality of ejector pins 28 are arranged on the ejector plate 26, the ejector pins 28 penetrate through the movable die plate 21 and the rear die insert 23, two ejection inserts 29 are further arranged in the rear die insert 23, and the ejection inserts 29 correspond to the back-off positions of products; the ejector pin 28 passes through the ejector insert 29, and a spring 30 is sleeved on the ejector pin 28 at the position of the ejector insert 29, one end of the spring 30 is abutted against the ejector insert 29, and the other end of the spring 30 is abutted against the movable die plate 21. The structure of the ejection insert 29 described in this embodiment is shown in fig. 7.

As a preferred embodiment, the ejector plate 26 and the ejector bottom plate 27 are provided with the support columns 3 in a penetrating manner, the upper ends of the support columns 3 are connected with the bottom plate 25 through bolts, and the lower ends of the support columns 3 are abutted with the movable mold plate 21.

As a preferred embodiment, the lower end of the ejector plate 26 is further provided with a plurality of return pins 4, and the return pins 4 are inserted into the movable mold plate 21 downward.

As a preferred embodiment, the lower end of the bottom plate 25 is further provided with a middle bracket 5, and the middle bracket 5 is inserted into the ejector pin bottom plate 27, the ejector pin plate 26 and the movable mold plate 21 in sequence downwards.

As a preferred embodiment, the panel 11 is provided with a guide post 6, the guide post 6 passes through the hot runner plate 12, the fixed die plate 13 and the movable die plate 21 in turn, the guide post 6 is further provided with a plurality of guide sleeves 7, and the hot runner plate 12, the fixed die plate 13 and the movable die plate 21 are respectively arranged on the guide post 6 through the corresponding guide sleeves 7.

As shown in fig. 8, the hot runner plate 12 is preferably further provided with a plurality of runners 8.

As a preferred embodiment, the lower end of the ejector pin base plate 27 is further provided with a plurality of inclined jacks 9, and the inclined jacks 9 sequentially pass through the ejector pin plate 26, the movable mold plate 21 and the rear mold insert 23 downwards.

In this embodiment, the injection molded product 10 is preferably constructed as shown in fig. 9, and has a back-off 31 therein.

Working principle:

as shown in fig. 10, when the mold is closed, the spring 30 is in a compressed state, and after the mold is opened, the ejection insert 29 is pushed against the elasticity of the spring 30 to move for 5mm, and the ejection insert 29 ejects the product 10 for 5mm; since the size of the back-off 31 of the product 10 is 0.3mm in this embodiment; thus, under the action of the ejector insert 29, the back-off 31 portion of the product 10 is disengaged from the rear mold insert 23, completing the first demolding action;

then, the ejector 26 is continuously controlled to drive the ejector 28 to move, and under the action of the ejector force, the position of the back-off 31 is deformed outwards to forcedly degum, so that the secondary demolding action is completed. Thereby ejecting the product 10. The die disclosed by the utility model is suitable for products with the back-off of 1 mm.

The foregoing embodiments and description have been provided merely to illustrate the principles and best modes of carrying out the utility model, and various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The secondary demoulding structure for the injection mould comprises a fixed mould (1) and a movable mould (2) which are matched with each other; the method is characterized in that: the fixed die (1) comprises a panel (11), a hot runner plate (12) and a fixed die plate (13), wherein the lower end of the panel (11) is provided with a heat insulation plate (14), the upper end of the panel (11) is provided with the hot runner plate (12), the fixed die plate (13) is arranged on the hot runner plate (12), a die cavity is formed in the fixed die plate (13), and a front die (15) is arranged in the die cavity;

the movable die (2) comprises a movable die plate (21), a groove is formed in the movable die plate (21), a rear film (22) is arranged in the groove, a rear die insert (23) is arranged in the rear film (22), and the rear film (22) is matched with the rear die insert (23);

the movable template (21) is symmetrically provided with a supporting plate (24), and the supporting plate (24) is provided with a bottom plate (25);

an ejector plate (26) and an ejector bottom plate (27) are further arranged between the two supporting plates (24), a plurality of ejector pins (28) are arranged on the ejector plate (26), the ejector pins (28) penetrate through the movable die plate (21) and the rear die insert (23), two ejection inserts (29) are further arranged in the rear die insert (23), and the ejection inserts (29) correspond to the back-off positions of products; the ejector pin (28) passes through the ejector insert (29), and a spring (30) is sleeved on the ejector pin (28) at the position of the ejector insert (29), one end of the spring (30) is abutted with the ejector insert (29), and the other end of the spring (30) is abutted with the movable mould plate (21).

2. The secondary release structure for an injection mold according to claim 1, wherein: the ejector pin plate (26) and the ejector pin bottom plate (27) are provided with the support columns (3) in a penetrating mode, the upper ends of the support columns (3) are connected with the bottom plate (25) through bolts, and the lower ends of the support columns (3) are abutted to the movable die plate (21).

3. The secondary release structure for an injection mold according to claim 1, wherein: the lower end of the thimble plate (26) is also provided with a plurality of back needles (4), and the back needles (4) are downwards inserted into the movable mould plate (21).

4. The secondary release structure for an injection mold according to claim 1, wherein: the lower end of the bottom plate (25) is also provided with a middle bracket (5), and the middle bracket (5) is downwards inserted into the thimble bottom plate (27), the thimble plate (26) and the movable template (21) in sequence.

5. The secondary release structure for an injection mold according to claim 1, wherein: the panel (11) on be provided with guide post (6), guide post (6) upwards pass through hot runner board (12), fixed die plate (13), movable mould board (21) in proper order, just guide post (6) on still be provided with a plurality of guide pin bushings (7), hot runner board (12), fixed die plate (13), movable mould board (21) set up on guide post (6) through corresponding guide pin bushing (7) respectively.

6. The secondary release structure for an injection mold according to claim 1, wherein: the hot runner plate (12) is also provided with a plurality of runners (8).

7. The secondary release structure for an injection mold according to claim 1, wherein: the lower end of the thimble bottom plate (27) is also provided with a plurality of inclined jacks (9), and the inclined jacks (9) sequentially penetrate through the thimble plate (26), the movable mould plate (21) and the rear mould insert (23) downwards.