CN110696304A

CN110696304A - Separation type auxiliary core-pulling structure and mold comprising same

Info

Publication number: CN110696304A
Application number: CN201911136472.9A
Authority: CN
Inventors: 赵林; 朱叶琪; 王昌威; 魏佳
Original assignee: HASCO Vision Technology Co Ltd
Current assignee: HASCO Vision Technology Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-01-17

Abstract

The invention relates to a separated auxiliary core-pulling structure, and belongs to the field of mold core-pulling structures. A separated auxiliary core-pulling structure is used for realizing core pulling of an injection molding product with a butt hook and comprises two symmetrical lateral core-pulling bodies, wherein an independent top core is arranged between the two lateral core-pulling bodies; the lateral core pulling device is characterized in that a convex strip corresponding to the hook of the injection product is arranged on the lateral core pulling device, after injection molding is completed, the convex strip is located in the hook of the injection product and is outwards pulled away from the ejector core, the lateral core pulling device is symmetrical to the ejector core, the middle position of the ejector core is moved, and the lateral core pulling device has the function of pulling the hook of the injection product. According to the invention, by adopting the separated auxiliary core-pulling structure, the core-pulling stroke is greatly shortened, and the stability of the injection molding product is improved.

Description

Separation type auxiliary core-pulling structure and mold comprising same

Technical Field

The invention relates to the field of mold core-pulling structures, in particular to a separated auxiliary core-pulling structure and a mold comprising the same.

Background

Some injection moulding products are provided with two ribs which need to be subjected to core pulling, and the length of the product is more than 150mm, and for the structure, the conventional method is to laterally pull a core on a mould, so that the core pulling stroke is longer, and the stability is poorer.

Disclosure of Invention

The invention aims to solve the problems and provides a separated auxiliary core-pulling structure and a mold comprising the same, which can effectively shorten the core-pulling stroke and improve the stability of an injection molding product.

The purpose of the invention is realized as follows:

a separated auxiliary core-pulling structure is used for realizing core pulling of an injection molding product with a butt hook and comprises two symmetrical lateral core-pulling bodies, wherein an independent top core is arranged between the two lateral core-pulling bodies;

the lateral core pulling device is characterized in that a convex strip corresponding to the hook of the injection product is arranged on the lateral core pulling device, after injection molding is completed, the convex strip is located in the hook of the injection product and is outwards pulled away from the ejector core, the lateral core pulling device is symmetrical to the ejector core, the middle position of the ejector core is moved, and the lateral core pulling device has the function of pulling the hook of the injection product.

Preferably, two positioning concave stations are symmetrically arranged on opposite side faces of the lateral core pulling, two symmetrical positioning bosses are arranged on the top core, and the two positioning bosses and the two positioning concave stations of the lateral core pulling are correspondingly arranged.

Preferably, one end of the top core, which extends into the middle of the two lateral loose cores, is smaller than the other end of the top core.

Preferably, two side surfaces of the top core, which are attached to the two lateral loose cores, are inclined curved surfaces.

The invention also discloses a mould, which comprises a fixed mould and a movable mould, wherein a cavity is formed between the fixed mould and the movable mould;

the lateral core pulling device is characterized in that a convex strip is arranged on the lateral core pulling device, the two convex strips for the lateral core pulling device are arranged in a back-to-back manner respectively, the two symmetrical convex strips for the lateral core pulling device are ejected into the middle of the lateral core pulling device, and the two convex strips for the lateral core pulling device are ejected into the cavity respectively.

Preferably, the lateral loose core is provided with a positioning shaft shoulder, and the positioning shaft shoulder is used for realizing positioning between the lateral loose core and the movable mold.

Preferably, the two lateral loose cores are both mounted on a movable die insert of the die.

The invention has the beneficial effects that: through adopting the supplementary structure of loosing core of disconnect-type, shortened the stroke of loosing core greatly, improved injection moulding product's stability.

Drawings

FIG. 1 shows a schematic structural view of an injection-molded product having hooks;

FIG. 2 is a schematic structural diagram illustrating a split auxiliary core-pulling structure;

FIG. 3 shows a schematic structural view of a mold;

FIG. 4 shows a schematic diagram of a mold clamping process;

fig. 5 shows a schematic diagram of the mold splitting process.

Detailed Description

Various embodiments of the present invention will be described with reference to the accompanying drawings. In the specification and drawings, elements having similar structures or functions will be denoted by the same reference numerals. It is to be understood that the drawings are for purposes of illustration and description only and are not intended as a definition of the limits of the invention. The dimensions shown in the figures are for clarity of description only and are not intended to be limiting, nor are they intended to be exhaustive or to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 2, a separated auxiliary core pulling structure is used for realizing core pulling of an injection molding product (shown in fig. 1) with a butt hook, and comprises two symmetrical lateral core pulling 1, wherein an independent top core 2 is arranged between the two lateral core pulling 1; the lateral core pulling 1 is provided with a convex strip 11 corresponding to the hook of the injection product, after injection molding is completed, the convex strip 11 is positioned in the hook of the injection product, when the convex strip is outwards pulled away from the top core 2, the two symmetrical lateral core pulling 1 moves towards the middle position where the top core 2 is positioned, and core pulling of the injection product with the hook is realized.

Compared with the mode of directly laterally pulling the core 1 which is used originally, the separated auxiliary core pulling structure can greatly shorten the core pulling stroke.

In order to better realize the restoration of the two lateral loose cores 1 after the top core 2 is pulled away, the lateral loose cores 1 are preferably made of elastic materials.

Specifically, two positioning concave platforms 12 are symmetrically arranged on the opposite side surfaces of the two lateral loose cores 1, two symmetrical positioning convex platforms 21 are arranged on the top core 2, and the two positioning convex platforms 21 and the two positioning concave platforms 12 of the two lateral loose cores 1 are correspondingly arranged. Through setting up matched with location concave station 12 and location boss 21, can effectively prevent the condition that the top core 2 pushed up the excessive position.

In order to facilitate the pushing and pulling of the top core 2, one end of the top core 2 extending into the middle of the two lateral loose cores 1 is smaller than the other end of the top core 2, and more specifically, two side faces of the top core 2 and the two lateral loose cores 1 attached to each other are inclined curved faces.

As shown in fig. 3, the mold comprises a fixed mold 3 and a movable mold 4, a cavity 5 is formed between the fixed mold 3 and the movable mold 4, the mold further comprises two symmetrical lateral loose cores 1 and a top core 2 which are arranged in the cavity 5, the top core 2 is arranged between the two lateral loose cores 1, the two lateral loose cores 1 are both arranged on a movable mold insert of the mold, and the top core 2 is driven independently. The lateral core pulling 1 is provided with convex strips 11, the convex strips 11 of the two lateral core pulling 1 are arranged back to back respectively, the top core 2 is pushed into the middle of the two symmetrical lateral core pulling 1, and the convex strips 11 of the two lateral core pulling 1 are pushed into the cavity 5 respectively (as shown in fig. 4).

After the mold is adopted, after the product is injected, the ejecting core 2 is driven to be pulled outwards, the two symmetrical lateral loose cores 1 can move towards the middle position where the ejecting core 2 is located, the loose core of the hooked injection product is realized (as shown in fig. 5), and the loose core stroke is greatly shortened. In order to better realize the restoration of the two lateral loose cores 1 after the top core 2 is pulled away, the lateral loose cores 1 are preferably made of elastic materials.

The lateral core pulling device is characterized in that positioning concave platforms 12 are symmetrically arranged on opposite side faces of the two lateral core pulling 1, two symmetrical positioning bosses 21 are arranged on the top core 2, the two positioning bosses 21 are arranged corresponding to the positioning concave platforms 12 of the two lateral core pulling 1, a positioning shaft shoulder 13 is further arranged on the lateral core pulling 1, and the positioning shaft shoulder 13 is used for realizing positioning between the lateral core pulling 1 and the movable mold 4. Through setting up matched with location concave station 12 and location boss 21, and location shaft shoulder 13, can effectively prevent the condition of the excessive position of ejector core 2 top.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A separated auxiliary core-pulling structure is used for realizing core pulling of an injection molding product with a butt hook and is characterized by comprising two symmetrical lateral core-pulling bodies, wherein an independent top core is arranged between the two lateral core-pulling bodies;

2. The separated auxiliary core pulling structure according to claim 1, wherein two opposite side surfaces of the two side core pulling bodies are symmetrically provided with positioning concave platforms, the top core is provided with two symmetrical positioning convex platforms, and the two positioning convex platforms are arranged corresponding to the two positioning concave platforms of the side core pulling bodies.

3. The split auxiliary core pulling structure according to claim 1, wherein one end of the top core, which extends into the middle of the two side core pulling bodies, is smaller than the other end of the top core.

4. The separated auxiliary core pulling structure according to claim 4, wherein two side surfaces of the top core, which are attached to the two side core pulling bodies, are inclined curved surfaces.

5. A mould comprises a fixed mould and a movable mould, and a cavity is formed between the fixed mould and the movable mould, and is characterized by further comprising two symmetrical lateral loose cores and a top core, wherein the two symmetrical lateral loose cores extend into the cavity;

6. The mold according to claim 5, wherein two opposite side surfaces of the two lateral loose cores are symmetrically provided with positioning concave platforms, the top core is provided with two symmetrical positioning convex platforms, and the two positioning convex platforms are arranged corresponding to the two positioning concave platforms of the lateral loose cores.

7. The mold according to claim 5, characterized in that one end of the top core, which extends into the middle of the two lateral loose cores, is smaller than the other end of the top core.

8. The mold according to claim 7, wherein two side surfaces of the top core, which are attached to the two side loose cores, are both inclined curved surfaces.

9. The mold according to claim 5, characterized in that the lateral loose core is provided with a positioning shoulder, and the positioning shoulder is used for realizing positioning between the lateral loose core and the movable mold.

10. The mold according to claim 5, wherein both of the lateral loose cores are mounted on a movable die insert of the mold.