CN216300010U

CN216300010U - Injection mould

Info

Publication number: CN216300010U
Application number: CN202121776962.8U
Authority: CN
Inventors: 卓楚光
Original assignee: Guangdong Dp Co ltd
Current assignee: Guangdong Dp Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-04-15
Anticipated expiration: 2031-07-30

Abstract

The utility model provides an injection mold, which comprises: the injection molding device comprises a main body, a plurality of injection molding holes and a plurality of sealing rings, wherein the main body is provided with an injection molding hole; an injection runner extending from the injection port into the body; two cross runners disposed within the body and in communication with the injection runner; two mold cavities disposed within the body; each cross-shaped runner comprises a feeding runner communicated with the injection molding runner and a discharging runner communicated with the feeding runner, the feeding runner and the discharging runner are arranged in a cross shape, and discharge ports at two ends of the discharging runner are respectively communicated with two mold cavities through ox horn runners; the sectional area of the ox horn runner gradually decreases from the discharge port of the discharge runner to the die cavity. The object of the utility model is to at least avoid the creation of gate marks on the surface of the product.

Description

Injection mould

Technical Field

The utility model relates to an injection mold.

Background

In industrial production, in order to mass-produce products, molds are generally used, and the molds can be classified into six types, i.e., injection molding, compression molding, extrusion molding, hollow molding, and die-casting molding according to product molding, wherein injection molding is a production method in which a plastic melted by heat is injected into a specific mold cavity by an injection molding machine to produce the plastic. The mold cavity of the existing injection molding mold is usually directly connected with the sprue, the sprue and the product cannot be automatically separated after the product is molded, post-processing needs to be carried out at the sprue position, and the working efficiency and the attractiveness of the product are seriously affected.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the present invention provides an injection mold to at least avoid the gate mark on the surface of the product.

According to an embodiment of the present invention, there is provided an injection mold including: the injection molding device comprises a main body, a plurality of injection molding holes and a plurality of sealing rings, wherein the main body is provided with an injection molding hole; an injection runner extending from the injection port into the body; two cross runners disposed within the body and in communication with the injection runner; two mold cavities disposed within the body; each cross-shaped runner comprises a feeding runner communicated with the injection molding runner and a discharging runner communicated with the feeding runner, the feeding runner and the discharging runner are arranged in a cross shape, and discharge ports at two ends of the discharging runner are respectively communicated with two mold cavities through ox horn runners; the sectional area of the ox horn runner gradually decreases from the discharge port of the discharge runner to the die cavity.

According to one embodiment of the utility model, the two cross runners are arranged symmetrically along the axis of the injection runner.

According to one embodiment of the utility model, the direction in which the injection runner extends is perpendicular to the plane formed by the direction in which the inlet runner extends and the direction in which the outlet runner extends.

According to one embodiment of the utility model, the two cross runners extend in a horizontal direction and the injection runner extends in a vertical direction.

According to one embodiment of the utility model, the two mould cavities are shaped differently.

According to one embodiment of the utility model, the two mould cavities are identical in shape.

According to one embodiment of the utility model, the body is formed as two upper and lower parts detachably snap-connected together, the connecting surface of the two upper and lower parts being parallel to the plane formed by the extending direction of the feed channel and the extending direction of the discharge channel.

In conclusion, discharge ports at two ends of each discharge runner of the injection mold are communicated with the mold cavity through the ox horn runners, and the section area of the ox horn runners is gradually reduced from the discharge ports of the discharge runners to the mold cavity, so that the contact area between a product in the mold cavity and a raw material injected through the cross runners is reduced, and sprue marks are prevented from being generated on the product; in addition, the two cross runners are symmetrically arranged along the axis of the injection molding runner, so that the uniformity of the product injection is further improved, and bubbles are prevented from being formed in the produced product.

Drawings

FIG. 1 shows a schematic perspective view of an injection mold according to one embodiment of the utility model;

FIG. 2 is the injection mold of FIG. 1 with the upper portion of the body omitted to better illustrate the internal structure thereof;

fig. 3 shows a schematic structural view of a mold cavity and a cross runner connected through a ox horn runner according to one embodiment of the utility model.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the following description is only exemplary of the present invention and should not be construed as limiting the present invention in any way. The various embodiments may be combined with one another to form other embodiments not described below or explicitly shown in the figures.

Referring to the drawings, there is provided an injection mold 10 according to an embodiment of the present invention, including: a main body 100, wherein an injection molding opening 102 is arranged on the main body 100; an injection runner 104 extending from the injection port 102 into the body 100; two cross runners 106 disposed within the body 102 and in communication with the injection runner 104; two mold cavities 108 disposed within the body 102; each cross flow passage 106 comprises a feeding flow passage 106A communicated with the injection molding flow passage 104 and a discharging flow passage 106B communicated with the feeding flow passage 106A, the feeding flow passage 106A and the discharging flow passage 106B are arranged in a cross shape, and discharging ports at two ends of the discharging flow passage 106B are respectively communicated with two mold cavities 108 through a horn flow passage 110 (visible in figure 3); wherein the sectional area of the ox horn runner 110 is gradually reduced from the discharge port of the discharge runner 106A to the mold cavity 108.

Because the section area of the ox horn runner 110 gradually becomes smaller from the discharge port of the discharge runner 106B to the mold cavity 108, the contact area between the product in the mold cavity 108 and the raw material injected through the cross runner 106 is reduced, and the gate mark is prevented from being generated on the product.

Referring to fig. 3, a mold cavity 108 and a cross runner 106 communicating with the mold cavity 108 through a bull horn runner 110 according to an embodiment of the present invention are shown, with other parts omitted to better illustrate the features of the above components. The mold cavity 108 is formed by upper and lower cavity portions that are clamped together, and only one of the cavity portions of the mold cavity 108 is shown in the figure. As shown, the gate 110A of the bull horn runner 110 is shown disposed at a non-exterior surface of the product being molded by the mold cavity 108. It is further ensured that no gate mark is produced on the surface of the product.

As shown in FIG. 2, according to one embodiment of the present invention, two cross runners 106 are symmetrically arranged along the axis 104A of the injection runner 104. Due to the arrangement, materials can be injected into the die cavity 108 more uniformly, the uniformity of material injection of products is improved, and bubbles are prevented from being formed in the produced products.

Further, the mold cavities 108 are disposed symmetrically along the axis 104A of the injection runner 104. It will be appreciated that the shape of mold cavity 108 need not be strictly symmetrical along axis 104A of injection runner 104, and that such an arrangement means that mold cavity 108 is "divided" into two portions having substantially the same volume and/or size along axis 104A of injection runner 104. This further improves the uniformity of the injected material and the quality of the product.

According to one embodiment of the present invention, the direction in which the injection runner 104 extends is perpendicular to the plane formed by the extending direction of the inlet runner 106A and the extending direction of the outlet runner 106B.

The two cross runners 106 extend in a horizontal direction and the injection runner 104 extends in a vertical direction. This arrangement ensures that the flow rates of the material in the two cross runners 106 are substantially uniform, and that the material injected into the mold cavity 108 by the two cross runners 106 is uniform.

As shown in fig. 2 and 3, the two mold cavities 108 are shaped differently according to one embodiment of the utility model.

According to another embodiment of the utility model, the two mold cavities 108 are identical in shape.

That is, the injection mold of the present invention can be applied to mold cavities of various shapes. Even if the shapes of the mold cavities in the injection mold are different, the sprue marks can be prevented from being produced on the formed products and the uniformity of the injected materials can be ensured by the uniform arrangement of the ox horn runner, the cross runner and the mold cavities, and the application range of the utility model is enlarged.

Referring to fig. 1 and 2, according to an embodiment of the present invention, the main body 100 is formed as two upper and

lower portions

100A, 100B detachably engaged with each other, and a connection surface of the two upper and

lower portions

100A, 100B is parallel to a plane formed by an extending direction of the inlet flow path 106A and an extending direction of the outlet flow path 106B. Thus, the mold cavity 108 is divided into upper and lower cavity portions by upper and

lower portions

100A, 100B (as best understood in connection with FIG. 3, e.g., the tubular structure of FIG. 3 is used for the snap-fit engagement of the upper and lower cavity portions). Preferably, the volumes of the mold cavity 108 in the upper and lower portions, i.e., the volumes of the upper and lower cavities, are substantially the same, which further improves the uniformity of the product, similar to as described above, and the upper and

lower portions

100A, 100B of the body 100 are detachably separated after the product is molded to facilitate removal of the molded product.

In the embodiment shown in the drawings, the upper and

lower portions

100A, 100B are snap-fitted together by interference fit of a projection 100C and a recess (not shown) provided at the joint face. It will of course be appreciated that any suitable known manner and/or structure may be selected by those skilled in the art to effect the releasable engagement of the upper and lower portions.

Advantageously, the body 100 is also provided with a through hole 112 communicating with the mould cavity. In production, the through hole 112 is plugged by the plug 112A, and after the product in the mold cavity 108 is molded, the plug 112A can be taken out and water is injected through the through hole 112 to cool the product and promote the shaping, so that the production process is accelerated; further, the product can be ejected out of the injection mold by the ejector pin extending into the through hole 112. Advantageously, a plurality of through holes may be provided on each face of the body 100.

In conclusion, discharge ports at two ends of each discharge runner of the injection mold are communicated with the mold cavity through the ox horn runners, and the section area of the ox horn runners is gradually reduced from the discharge ports of the discharge runners to the mold cavity, so that the contact area between a product in the mold cavity and a raw material injected through the cross runners is reduced, and sprue marks are prevented from being generated on the product; in addition, the two cross runners are symmetrically arranged along the axis of the injection molding runner, so that the uniformity of the product injection is further improved, bubbles are prevented from being formed in the produced product, and the quality of the product is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold comprising:

the injection molding device comprises a main body, wherein an injection molding port is arranged on the main body;

an injection runner extending from the injection port into the body;

two cross runners disposed within the body and in communication with the injection runner;

two mold cavities disposed within the body;

the method is characterized in that:

each cross-shaped runner comprises a feeding runner communicated with the injection molding runner and a discharging runner communicated with the feeding runner, the feeding runner and the discharging runner are arranged in a cross shape, and discharge ports at two ends of the discharging runner are respectively communicated with the two mold cavities through ox horn runners;

the sectional area of the ox horn runner is gradually reduced from the discharge hole of the discharge runner to the die cavity.

2. An injection mold according to claim 1, wherein the two cross runners are arranged symmetrically along the axis of the injection runner.

3. An injection mould according to claim 2, characterized in that the direction in which the injection runner extends is perpendicular to the plane formed by the direction in which the inlet runner extends and the direction in which the outlet runner extends.

4. An injection mould according to claim 3, characterized in that the two cross runners extend in a horizontal direction and the injection runner extends in a vertical direction.

5. An injection mould according to claim 1, characterized in that the two mould cavities differ in shape.

6. An injection mold according to claim 1, wherein the two mold cavities are identical in shape.

7. An injection mold according to claim 1, wherein the body is formed as upper and lower parts detachably snap-coupled together, and a coupling plane of the upper and lower parts is parallel to a plane formed by an extending direction of the feed runner and an extending direction of the discharge runner.