CN203472096U - Ejector structure - Google Patents

Abstract

The utility model discloses an ejection structure, forming a product with an arc-shaped inner top surface and an undercut on the inner side. The ejection structure includes: a straight ejector, which includes a straight ejector rod and an arc-shaped inner top surface of the formed product. The first forming part, the straight ejector rod and the first forming part are combined and fixed; the inclined roof is arranged on one side of the straight roof, and the inclined roof has an inclined ejector rod and one side of the inclined ejector rod The extended second forming part, the second forming part forms the undercut of the product; the male mold core cooperates with the first forming part and the second forming part to form the inner surface of the product. When the mold is opened, the straight top ejects the product along the mold opening direction, while the inclined top exits obliquely at an angle with a certain inclination to the mold opening direction. When the second forming part completely withdraws from the undercut, The product can be removed. It can be seen that the above-mentioned structure is simple and can solve the forming and withdrawal of products with arc-shaped inner top surfaces and undercuts on the inner sides.

Description

Ejection structure

【Technical field】

The utility model relates to an ejection structure, in particular to an ejection structure with a straight top and an inclined top.

【Background technique】

There are undercuts on many plastic products, and it is necessary to design a corresponding structure to withdraw them when using a mold for molding.

Please refer to FIG. 1 , which is a schematic structural diagram of a product. As shown in the figure, the top surface of the product 10 is arc-shaped, and the inner side of the product 10 near the bottom has an undercut 11 . For the molding of this type of product 10, the withdrawal of undercut 11 has become an urgent problem to be solved.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a sloping roof structure in the prior art. Using the inclined top 12 to form the product 10, when withdrawing, because the inner top surface of the product 10 is arc-shaped, the inclined top 12 will scoop glue, so this method is not advisable. And if adopt the structure that inclined roof 12 side exits, space is insufficient again.

Please refer to FIG. 3 . FIG. 3 is a structural diagram of an inner slider in the prior art. The product 20 with an undercut 21 inside can be molded by using the inner slider 22 . However, as shown in the figure, the structure of the inner slider 22 is too complicated.

In view of this, it is necessary to develop an ejection structure to solve the above problems.

【Content of invention】

Therefore, the purpose of this utility model is to provide an ejection structure to solve the problem of complex ejection structure for products with arc-shaped inner top surface and undercut on the inner side.

In order to achieve the above purpose, the ejection structure provided by the utility model is formed into a product with an arc-shaped inner top surface and an undercut on the inner side. The ejection structure includes:

Straight ejector, which includes a straight ejector rod and a first forming part on the arc-shaped inner top surface of the shaped product, the straight ejector rod and the first forming part are combined and fixed;

An inclined roof, which is arranged on one side of the straight roof, the inclined roof has an inclined ejector rod and a second forming part extending from one side of the inclined ejector rod, and the second forming part shapes the product. undercut;

The male mold core cooperates with the first molding part and the second molding part to shape the inner surface of the product.

Optionally, the straight ejector rod and the first forming part are fixed by screwing.

Optionally, there are two straight ejector pins.

Compared with the prior art, with the ejection structure of the present invention, when the mold is opened, the straight top ejects the product along the mold opening direction, and at the same time, the inclined top is inclined along an angle with a certain inclination to the mold opening direction. When the second molding part is fully withdrawn from the undercut (in order to ensure safety, it usually needs to be withdrawn by an additional safety distance), the product can be taken out. It can be seen that the above-mentioned structure is simple and can solve the forming and ejection of products with an arc-shaped inner top surface and an undercut on the inner side.

【Description of drawings】

FIG. 1 is a schematic structural diagram of a product.

FIG. 2 is a schematic diagram of a slanted roof structure in the prior art.

FIG. 3 is a structural schematic diagram of an inner slider in the prior art.

FIG. 4 is a schematic perspective view of a preferred embodiment of the ejection structure of the present invention.

FIG. 5 is a schematic diagram of an exploded structure of a preferred embodiment of the ejection structure of the present invention.

FIG. 6 is a schematic cross-sectional structure diagram of a mold clamping state of a preferred embodiment of the ejection structure of the present invention.

FIG. 7 is a schematic diagram of a cross-sectional structure of a mold-opening state of a preferred embodiment of the ejection structure of the present invention.

【Detailed ways】

Please refer to Fig. 4 and Fig. 5 together. Fig. 4 is a schematic diagram of a three-dimensional structure of a preferred embodiment of the ejection structure of the present invention, and Fig. 5 is a disassembly of a preferred embodiment of the ejection structure of the present invention. Schematic.

In order to achieve the above purpose, the ejection structure provided by the utility model is formed into a product 10 with an arc-shaped inner top surface and an undercut 11 on the inner side (please refer to Fig. 1 again). The ejection structure includes:

The straight top includes a straight top rod 100 and a first forming part 101 on the arc-shaped inner top surface of the molded product 10, and the straight top rod 100 and the first forming part 101 are combined and fixed.

Inclined roof, which is located on one side of the straight roof, the inclined roof has an inclined ejector rod 102 and a second forming part 103 extending from one side of the inclined ejector rod 102, and the second forming part 103 forms the said undercut 11 of product 10;

The male mold core 104 cooperates with the first molding part 101 and the second molding part 103 to shape the inner surface of the product 10 .

Wherein, the straight ejector rod 100 and the first forming part 101 can be combined and fixed by screws 105 .

Wherein, there may be two straight ejector rods 100, so that the force is more stable.

Please refer to Fig. 6 and Fig. 7 again. Fig. 6 shows a cross-sectional structure diagram of a mold clamping state of a preferred embodiment of the ejection structure of the present utility model, and Fig. 7 shows a comparison of the ejection structure of the present utility model. The schematic diagram of the cross-sectional structure of the mold opening state of the preferred embodiment.

When the mold is opened, the straight top pushes out the product 10 along the mold opening direction, and at the same time, the inclined top exits obliquely at an angle with a certain inclination to the mold opening direction. When the second forming part 103 completely exits the undercut After 11 (in order to ensure safety, usually there is one more safety distance), the product 10 can be taken out. It can be seen that the above-mentioned structure is simple and can solve the forming and ejection of the product 10 with the arc-shaped inner top surface and the undercut 11 inside.

Claims (3)

1. An ejection structure, forming a product with an arc-shaped inner top surface and an undercut on the inner side, characterized in that the ejection structure includes: Straight ejector, which includes a straight ejector rod and a first forming part on the arc-shaped inner top surface of the shaped product, the straight ejector rod and the first forming part are combined and fixed; An inclined roof, which is arranged on one side of the straight roof, the inclined roof has an inclined ejector rod and a second forming part extending from one side of the inclined ejector rod, and the second forming part shapes the product. undercut; The male mold core cooperates with the first molding part and the second molding part to shape the inner surface of the product. 2. The ejection structure according to claim 1, characterized in that, the straight ejector rod and the first forming part are fixed by screwing. 3. The ejection structure according to claim 1, wherein there are two straight ejector pins.

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