CN211807492U

CN211807492U - Secondary ejection mechanism of high-precision thin-wall plastic part injection mold

Info

Publication number: CN211807492U
Application number: CN201922110120.8U
Authority: CN
Inventors: 张海珍; 陈昕; 文建洲
Original assignee: Henan Camel Medical Device Research Institute Co ltd
Current assignee: Henan Camel Medical Device Research Institute Co ltd
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-10-30
Anticipated expiration: 2029-11-30

Abstract

The utility model relates to an injection mold technical field discloses a piece injection mold's secondary ejection mechanism is moulded to high accuracy thin wall, including front mould panel, front mould board, push pedal, back template, thimble board and bottom plate, front mould panel install one side of front mould board, the inside front mould benevolence that is provided with of front mould board, the push pedal setting is between front mould board and back template, the inside back mould benevolence that is provided with of push pedal, back template lower extreme is provided with the bottom plate, be groove structure in the middle of the bottom plate, the thimble board sets up in the recess, the ejector pin passes the bottom plate and links to each other with injection molding machine ejection system, is provided with thimble and back needle on the thimble board, the top of thimble slides and runs through the inside back mould benevolence of back template and push pedal, the back needle runs through the back template and is connected with the push pedal through the back needle pull block. The utility model discloses simple structure, low cost, convenient to use, the action is reliable and stable, can adapt to the production demand of different shape products.

Description

Secondary ejection mechanism of high-precision thin-wall plastic part injection mold

Technical Field

The utility model relates to an injection mold technical field, concretely relates to piece injection mold's secondary ejection mechanism is moulded to high accuracy thin wall.

Background

An injection mold is a tool for producing plastic products and also a tool for giving the plastic products complete structure and precise dimensions. Injection molding is a processing method used for mass production of parts with complex shapes, and particularly relates to a method for obtaining a formed product by taking molten plastic into a mold cavity at high pressure through an injection molding machine, cooling and solidifying and ejecting.

The plastic part product ejection mechanism is a system device for safely and nondestructively ejecting an injection molding part out of a mold cavity. At present, after an injection product with a common shape is molded, the product can be separated from a mold only by singly ejecting a conventional ejector sleeve, an ejector pin and the like for demolding, but along with the diversification of the injection product, for some products with complex shapes, especially high-precision thin-wall plastic products, the problems that full-automatic production cannot be realized or the size precision of the plastic products cannot be ensured by one-time ejection often exist, and the like, and secondary ejection is often needed. However, most of the existing secondary ejection mechanisms are complex in structure, and a plurality of accessory parts are usually required to be added on the basis of a standard die structure, so that not only is the die cost increased, but also the existing secondary ejection mechanisms are inconvenient to use in many occasions due to the limitation of the size and the structure of a product.

Disclosure of Invention

The utility model aims at providing a simple structure, low cost, stable performance's a high accuracy thin wall plastic injection mold's secondary ejection mechanism to solve to mould a goods to some high accuracy thin walls and adopt ejection mechanism ejecting difficulty once, thereby mould a goods size and the quality problem that arouses.

The technical scheme of the utility model as follows:

a secondary ejection mechanism of a high-precision thin-wall plastic part injection mold comprises a front mold panel, a front mold plate, a push plate, a rear mold plate, an ejector plate and a bottom plate, the front mould panel is arranged at one side of the front mould plate, a front mould core is arranged in the front mould plate, the push plate is arranged between the front template and the rear template, a rear mold core is arranged inside the push plate, the lower end of the rear template is provided with a bottom plate, the middle of the bottom plate is of a groove structure, the ejector plate is arranged in the groove, the ejector rod penetrates through the bottom plate to be connected with an ejection system of the injection molding machine, an ejector pin and a return pin are arranged on the ejector plate, the top end of the thimble penetrates through the rear template and the rear mold core in the push plate in a sliding manner, the back needle penetrates through the rear template and is connected with the push plate through a back needle pulling block, and the rear template is also respectively provided with a contour screw for limiting the push plate and an air cylinder for pushing the push plate to move.

Furthermore, the front mould panel is fixedly connected with the front mould plate through threads.

Furthermore, the back needle is fixedly connected with the back needle pulling block through threads.

Furthermore, the rear template is fixedly connected with the bottom plate through threads.

Furthermore, the ejector plate is connected with an ejection system of the injection molding machine through internal threads of the ejector rod.

Furthermore, the equal-height screws are fixedly connected with the rear template through threads.

Furthermore, the rear template is also provided with an insert pin.

The utility model discloses technical scheme brings beneficial effect as follows.

1. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold has simple structure, low cost and convenient use, can effectively ensure the quality of high-precision plastic parts and improves the qualification rate of the plastic parts; and the secondary ejection mechanism of the die is stable in structure, and the whole secondary ejection mechanism is connected through threads, so that the accurate positioning of the movement structure is ensured, and the service life of the die can be prolonged.

2. The utility model discloses secondary ejection mechanism is apart from adjustable, and the cylinder is ejecting stable safety and device rational in infrastructure, the action is reliable and stable, can adapt to various different injection moulding product's production demand.

Drawings

Fig. 1 is the utility model discloses piece injection mold's secondary ejection mechanism cross-sectional view is moulded to high accuracy thin wall.

Fig. 2 is the local enlarged view of the secondary ejection mechanism of the utility model.

In the figure, 1-a front template, 2-a push plate, 3-a rear template, 4-an ejector plate, 5-a bottom plate, 6-a front mold core, 7-a rear mold core, 8-a groove, 9-an ejector rod, 10-an ejector pin, 11-a return pin, 12-a return pin pulling block, 13-a contour screw, 14-a cylinder, 15-an insert pin, 16-a plastic product and 17-a front mold panel.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 and 2, a secondary ejection mechanism of a high-precision thin-wall plastic injection mold comprises a front mold panel 17, a front mold plate 1, a push plate 2, a rear mold plate 3, an ejector plate 4 and a bottom plate 5, wherein the front mold panel 17 is installed on one side of the front mold plate 1, a front mold core 6 is arranged inside the front mold plate 1, the push plate 2 is arranged between the front mold plate 1 and the rear mold plate 3, a rear mold core 7 is arranged inside the push plate 2, the lower end of the rear mold plate 3 is connected with the bottom plate 5, the middle of the bottom plate 5 is of a groove structure, the ejector plate 4 is arranged in a groove 8, an ejector 9 penetrates through the bottom plate 5 to be connected with an ejection system of an injection molding machine, an ejector pin 10 and a return pin 11 are arranged on the ejector plate 4, the top end of the ejector pin 10 slidably penetrates through the rear mold plate 3 and the rear mold core 7 inside the push plate 2, the return pin 11 penetrates through the rear mold plate 3 to be connected with the push, and the rear template 3 is also respectively provided with a contour screw 13 for limiting the push plate 2 and an air cylinder 14 for pushing the push plate 2 to move.

Further, the front mould panel 17 is fixedly connected with the front mould plate 1 through threads.

Further, the backstitch 11 is fixedly connected with the backstitch pulling block 12 through threads.

Further, the rear template 3 is connected with the bottom plate 5 through threads.

Furthermore, the ejector plate 4 is connected with an ejection system of the injection molding machine through internal threads of an ejector rod 9.

Further, the equal-height screws 13 are fixedly connected with the rear template 3 through threads.

Furthermore, the rear template 3 is also provided with an insert pin 15 for forming an inner cavity on a plastic product 16.

The working principle of the utility model is as follows:

in the process of opening the die, the push plate 2 and the ejector plate 4 are connected with the ejector rod 9 by using the return pin 11 and the return pin pull block 12, and the die opening between the front template 1 and the push plate 2 is realized firstly; at the moment, an ejection system of the injection molding machine is started, the ejector rod 9 pushes the ejector plate 4, and the air cylinder 14 pushes the push plate 2, so that the push plate 2 and the ejector pin 10 move simultaneously to finish primary ejection; when the push plate 2 reaches the limit distance of the equal-height screw 13, the push plate 2 stops moving under the limit of the equal-height screw 13, the ejector rod 9 pushes the ejector plate 4 to continue moving, the ejector pin 10 continues ejecting, the secondary ejection effect is realized, and the plastic part 16 automatically falls into the product collection frame; when the die is closed, the injection molding machine pulls the ejector plate 4 through the ejector rod 9, so that the ejector plate 2 and the ejector pin 10 are reset.

The utility model discloses secondary ejection mechanism ejecting distance is adjustable, and the cylinder is ejecting stable safety and device rational in infrastructure, the action is reliable and stable.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a piece injection mold's secondary ejection mechanism is moulded to high accuracy thin wall which characterized in that: the injection molding machine ejector comprises a front die panel (17), a front die plate (1), a push plate (2), a rear die plate (3), an ejector pin plate (4) and a bottom plate (5), wherein the front die panel (17) is installed on one side of the front die plate (1), a front die core (6) is arranged in the front die plate (1), the push plate (2) is arranged between the front die plate (1) and the rear die plate (3), a rear die core (7) is arranged in the push plate (2), the bottom plate (5) is arranged at the lower end of the rear die plate (3), a groove structure is arranged in the middle of the bottom plate (5), the ejector pin plate (4) is arranged in a groove (8), an ejector rod (9) penetrates through the bottom plate (5) to be connected with an injection molding machine ejection system, an ejector pin (10) and a return pin (11) are arranged on the ejector pin plate (4), the top end of the ejector pin (10) penetrates through the rear die plate (3) and the rear die core (7) in, the back needle (11) penetrates through the back template (3) and is connected with the push plate (2) through a back needle pulling block (12), and the back template (3) is further respectively provided with a contour screw (13) for limiting the push plate (2) and an air cylinder (14) for pushing the push plate (2) to move.

2. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold according to claim 1, characterized in that: the front mould panel (17) is fixedly connected with the front mould plate (1) through threads.

3. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold according to claim 1, characterized in that: the back needle (11) is fixedly connected with the back needle pulling block (12) through threads.

4. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold according to claim 1, characterized in that: the rear template (3) is fixedly connected with the bottom plate (5) through threads.

5. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold according to claim 1, characterized in that: the ejector plate (4) is connected with an ejection system of the injection molding machine through internal threads of the ejector rod (9).

6. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold according to claim 1, characterized in that: the equal-height screws (13) are fixedly connected with the rear template (3) through threads.

7. The secondary ejection mechanism of the high-precision thin-wall plastic part injection mold according to claim 1, characterized in that: the rear template (3) is also provided with an insert pin (15).