CN219171574U

CN219171574U - Plastic mould structure

Info

Publication number: CN219171574U
Application number: CN202223609295.1U
Authority: CN
Inventors: 陈希龄; 郑晓鹏
Original assignee: Guangdong Bokang Electronics Co ltd
Current assignee: Guangdong Bokang Electronics Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-13
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a plastic mould structure, includes cover half and movable mould, be equipped with the cover half die cavity on the cover half, be equipped with the movable mould die cavity on the movable mould, be equipped with the die cavity panel in the movable mould die cavity, be equipped with the jack-up post on the movable mould lateral wall, this jack-up post stretches into between the die cavity panel in the movable mould and the surface of movable mould die cavity, the die cavity panel has been connected extension spring, this extension spring is connected with the surface of movable mould die cavity, the jack-up post is pressing the die cavity panel and makes extension spring be in tensile state for the spring forms a tensile force to the die cavity panel, be equipped with the ejector rod on the cover half, the ejector rod extends to the bottom surface of cover half die cavity. The utility model can reserve the clearance of the movable mould in advance, thereby achieving the purposes of not damaging the surface of the rubber shell and generating stress marks.

Description

Plastic mould structure

Technical Field

The utility model relates to a mold, in particular to a plastic mold structure.

Background

With the development of electronic products, the demand of plastic shells of the products is increased, and the quality requirements are continuously improved. For plastic shells, a plastic mold is generally used for molding, where the plastic mold is a mold mainly used for molding the plastic shell, and not the mold itself is made of plastic material. There are two kinds of molds, one is a slide type structure and the other is a sleeve type structure, and the sleeve type structure mold is favored by a wide range of users because the molded plastic shell has no parting line in appearance. However, in the current sleeve-type plastic mold, during the injection molding and demolding, the surface of the plastic shell is easily damaged by strain and stress marks due to various influences such as mold assembly tolerance, movement shake of the injection molding machine and the like.

Disclosure of Invention

The utility model aims to provide a plastic mold structure.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a plastic mould structure, includes cover half and movable mould, be equipped with the cover half die cavity on the cover half, be equipped with the movable mould die cavity on the movable mould, be equipped with the die cavity panel in the movable mould die cavity, be equipped with the jack-up post on the movable mould lateral wall, this jack-up post stretches into between the die cavity panel in the movable mould and the surface of movable mould die cavity, the die cavity panel has been connected extension spring, this extension spring is connected with the surface of movable mould die cavity, the jack-up post is pressing the die cavity panel and makes extension spring be in tensile state for the spring forms a tensile force to the die cavity panel, be equipped with the ejector rod on the cover half, the ejector rod extends to the bottom surface of cover half die cavity.

The top column is a square rod.

The springs are at least four, and are uniformly distributed and connected on the back surface of the movable mold cavity.

The side wall of the fixed die is provided with a pushing cylinder, the bottom surface of the fixed die is provided with a guide rail groove, a connecting rod is arranged in the guide rail groove, one end of the connecting rod is connected with a driving rod of the pushing cylinder through a coupler, the other end of the connecting rod is provided with a first inclined surface, the bottom surface of the ejector rod is provided with a second inclined surface matched with the inclined surface on the connecting rod, and the first inclined surface of the connecting rod faces the second inclined surface of the ejector rod.

And a limiting protrusion for limiting the stroke of the ejector rod is arranged on the fixed die.

A vertical groove is formed in the movable die, and the side edge of the cavity panel is located in the vertical groove.

The utility model uses the top column to form the propping against the cavity panel, and before demoulding, the top column is taken out first, so that the cavity panel can be separated from the surface of the molded plastic shell, and the surface of a product can be prevented from being damaged as much as possible and stress marks can be prevented from being generated during mould opening.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of description and simplification of the description, and does not indicate or imply that the indicated apparatus or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1, a plastic mold structure comprises a fixed mold 4 and a movable mold 9, wherein the fixed mold 1 is provided with a fixed mold cavity 6, the movable mold 9 is provided with a movable mold cavity 10, a cavity panel 8 is arranged in the movable mold cavity 10, a jack post 7 is arranged on the side wall of the movable mold 9, the jack post 7 stretches into the space between the cavity panel 8 in the movable mold 9 and the surface of the movable mold cavity 10, the cavity panel 8 is provided with a tension spring 11, the tension spring 11 is connected with the surface of the movable mold cavity 10, the jack post 7 presses the cavity panel 8 and enables the tension spring 11 to be in a tension state, the tension force is formed on the cavity panel by the spring, the fixed mold 4 is provided with an ejector rod 5, and the ejector rod 5 extends to the bottom surface of the fixed mold cavity 6. In order to facilitate taking out the jack-prop, a pull ring can be arranged on the jack-prop, and the pull ring can be made of a temperature-resistant material. When the top post is not against the cavity panel, the cavity panel is moved upward by a small stroke under the tensile force of the spring.

The top column 4 is a square rod and forms a larger contact area with the cavity panel. The cavity panel is also made of the same material as the movable mold and needs to ensure that the injection molding operation is satisfied.

The springs are arranged at least four, are uniformly distributed and connected on the back surface of the movable mold cavity, and have more balanced acting force.

The side wall of the fixed die 4 is provided with a pushing cylinder 2, the bottom surface of the fixed die 4 is provided with a guide rail groove 13, a connecting rod 3 is arranged in the guide rail groove 13, one end of the connecting rod 3 is connected with a driving rod of the pushing cylinder 2 through a coupler, the other end of the connecting rod is provided with a first inclined surface, the bottom surface of the ejector rod is provided with a second inclined surface matched with the inclined surface on the connecting rod, and the first inclined surface of the connecting rod faces the second inclined surface of the ejector rod. The pushing cylinder drives the connecting rod to move, and the ejector rod is jacked up by utilizing a wedge-shaped structure formed by combining the first inclined plane and the second inclined plane, so that a product in the fixed die cavity is ejected out.

The fixed die is provided with a limiting protrusion for limiting the stroke of the ejector rod, so that the ejector rod is prevented from moving upwards and falling out from the lower part.

The movable mold is internally provided with a vertical groove, and the side edge of the cavity panel is positioned in the vertical groove, so that the movement of the cavity panel is more accurate.

The known technology is to provide a necessary filling port in the fixed mold or the movable mold.

After the mold is closed, the product is molded in a molding cavity formed by the fixed mold cavity and the cavity panel, and the cavity panel is pressed down by the ejector post. After the molding is finished, the plastic material can shrink, and then the action of pulling out the jack post is matched, so that the cavity panel is not propped against and moves upwards under the tensile force of the spring, a gap is formed between the cavity panel and the surface of a molded product, and when the mold is opened, the cavity panel and the product are not contacted, the problem of strain is avoided, and no stress trace exists on the surface.

It should be noted that, the foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited to the foregoing embodiment, but it should be understood that although the present utility model has been described in detail with reference to the embodiment, it is possible for those skilled in the art to make modifications to the technical solutions described in the foregoing embodiment, or to make equivalent substitutions for some technical features thereof, but any modifications, equivalent substitutions, improvements and the like within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a plastic mould structure, includes cover half and movable mould, its characterized in that, be equipped with the cover half die cavity on the cover half, be equipped with the movable mould die cavity on the movable mould, be equipped with the die cavity panel in the movable mould die cavity, be equipped with the jack-prop on the movable mould lateral wall, this jack-prop stretches into between the die cavity panel in the movable mould and the surface of movable mould die cavity, the die cavity panel has connect extension spring, this extension spring is connected with the surface of movable mould die cavity, the jack-prop is pressing the die cavity panel and makes extension spring be in tensile state for the spring forms a tensile force to the die cavity panel, be equipped with the ejector pin on the cover half, the ejector pin extends to the bottom surface of cover half die cavity.

2. The plastic mold structure of claim 1, wherein the top post is a square bar.

3. The plastic mold structure according to claim 2, wherein at least four springs are provided and are uniformly connected to the back surface of the movable mold cavity.

4. The plastic mold structure of claim 3, wherein the side wall of the fixed mold is provided with a pushing cylinder, the bottom surface of the fixed mold is provided with a guide rail groove, a connecting rod is arranged in the guide rail groove, one end of the connecting rod is connected with a driving rod of the pushing cylinder through a coupler, the other end of the connecting rod is provided with a first inclined surface, the bottom surface of the ejector rod is provided with a second inclined surface matched with the inclined surface on the connecting rod, and the first inclined surface of the connecting rod faces the second inclined surface of the ejector rod.

5. The plastic mold structure of claim 4, wherein the fixed mold is provided with a limiting protrusion for limiting the stroke of the ejector pin.

6. The plastic mold structure of claim 5, wherein the movable mold is provided with a vertical groove therein, and a side edge of the cavity panel is positioned in the vertical groove.