Retreating mechanism for preventing product from adhering to angle pin

Abstract

The invention relates to a withdrawing mechanism for preventing a product from adhering to an angle pin, which comprises a core insert provided with the angle pin, one end of which is fixed on an ejector rod and used for withdrawing an inverted buckle of the product and ejecting the product under the action of the ejector rod, one side of the angle pin is profiled with the inverted buckle of the product and used for forming the inverted buckle of the product, a rotating shaft is arranged in the angle pin, and a push block is movably arranged on the rotating shaft; when the angle pin is ejected out through the ejector rod, the push block rotates by taking the rotating shaft as the center under the action of the limiting groove and is used for ejecting the inverted buckle of the product out of one surface in contact with the angle pin; the injection mold has the beneficial effects that the rotating shaft is arranged in the angle pin, and the push block arranged on the rotating shaft can rotate around the rotating shaft as the center under the action of the limiting groove when the angle pin retreats and ejects the product, so that an inverted buckle of the product is pushed out of the side of the angle pin; and the mechanism is small in occupied mold space, simple in structure and easy to machine.

Description

Technical Field

[0001] The present invention relates to the technical field of die mechanisms, and in particular to an ejection mechanism for preventing products from sticking to angled pins.

Background Art

[0002] As shown in Figure 1 the product 20, the undercut 30 thereof needs to be formed by an angled pin. However, the shape of the undercut 30 provided by the structure of the product 20 is complex, resulting in the product 20 sticking to the angled pin. Therefore, an auxiliary mechanism for the angled pin to withdraw is required. Currently, a spring is provided at the position where the angled pin withdraws from the undercut 30 of the product 20, and a pressure plate is provided at the spring position to fix the spring. When the angled pin withdraws from the undercut 30 of the product 20, it can assist the angled pin to withdraw from the undercut 30 of the product 20 through the elastic force. However, it occupies a large space, increases the die volume, and this mechanism will be worn after long-term use, resulting in the failure of the mechanism's ejection function and affecting the production of the product 20.

[0003] In view of this, it is necessary to provide an ejection mechanism for preventing products from sticking to angled pins to solve the above problems.

Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the shape of the undercut provided by the product is complex, resulting in the product sticking to the angled pin. Currently, a spring is provided at the position where the angled pin withdraws from the undercut of the product, and a pressure plate is provided at the spring position to fix the spring. However, it occupies a large space, and long-term use will cause wear to the die, resulting in the failure of the mechanism's ejection function. Therefore, the present invention provides an ejection mechanism for preventing products from sticking to angled pins to solve the above problems.

[0005] The solution of the present invention to solve its technical problem is: an ejection mechanism for preventing products from sticking to angled pins, comprising:

[0006] A male mold core, an angled pin is provided inside the male mold core. One end of the angled pin is fixed on a ejector rod, which is used to withdraw from the undercut of the product and eject the product under the action of the ejector rod. One side of the angled pin is shaped to conform to the undercut of the product for forming the undercut of the product. A rotating shaft is provided inside the angled pin, and a push block is movably provided on the rotating shaft. When the angled pin is ejected by the ejector rod, the push block can rotate around the rotating shaft under the action of a limit groove to eject the surface of the undercut of the product that contacts the angled pin.

[0007] A female mold core, which cooperates with the male mold core for forming the product.

[0008] Preferably, two groups of push blocks are provided, which can not only save materials but also balance the pushing of the undercut of the product to withdraw from the angled pin.

[0009] The beneficial effects of the present invention are as follows. The present invention provides an ejection mechanism for preventing a product from sticking to a lifter pin. It adopts a lifter pin with a rotating shaft provided therein, and a push block provided on the rotating shaft can rotate around the rotating shaft under the action of a limiting groove when the lifter pin ejects and pushes out the product, so as to push out the undercut of the product from the side of the lifter pin, avoiding the phenomenon that the product sticks to the lifter pin. This mechanism occupies a small space in the mold, has a simple structure, and is easy to process.

Description of the Drawings

[0010] Figure 1 It is a schematic structural view of a conventional product.

[0011] Figure 2 It is a perspective view of an ejection mechanism for preventing a product from sticking to a lifter pin according to the present invention.

[0012] Figure 3 is Figure 2 An enlarged view of part A in

[0013] Figure 4 It is a schematic structural view of the lifter pin in the present invention.

Detailed Embodiment

[0014] To further elaborate on the technical means and effects adopted by the present invention, the following describes it in detail in combination with the embodiments and the accompanying drawings of the present invention.

[0015] The present invention provides an ejection mechanism for preventing a product from sticking to a lifter pin, including:

[0016] A male mold core 100, within which a lifter pin 101 is provided. One end of the lifter pin 101 is fixed on a ejector rod (not shown in the figure), and is used to eject the undercut 30 of the product 20 and push out the product 20 under the action of the ejector rod (not shown in the figure). One side of the lifter pin 101 is shaped to fit the undercut 30 of the product 20 for forming the undercut 30 of the product 20. A rotating shaft 102 is provided within the lifter pin 101, and a push block 103 is movably provided on the rotating shaft 102. In this embodiment, two groups of push blocks 103 are provided, which can not only save materials but also evenly push the undercut 30 of the product 20 out of the lifter pin 101. When the lifter pin 101 is pushed out by the ejector rod (not shown in the figure), the push block 103 can rotate around the rotating shaft 102 under the action of a limiting groove 104, so as to push out the undercut 30 of the product 20 from the surface in contact with the lifter pin 101;

[0017] A female mold core 200, which cooperates with the male mold core 100 for forming the product 20.

[0018] The working process of the present invention is as follows: when the product 20 is ejected, the ejector rod (not shown in the figure) pushes the angled pin 101 out of the undercut 30 of the product 20, and at the same time ejects the product 20. At this time, under the action of the angled pin 101, the pushing block 103 rotates along the rotating shaft 102 through the limiting groove 104, and one end of the pushing block 103 ejects the undercut 30 of the product 20, so that the undercut 30 of the product 20 can be separated from the angled pin 101, avoiding the product 20 sticking to the angled pin 101. When the mold is closed after the product 20 is taken out, the female mold core 200 pushes the angled pin 101 back to its original position, and further causes the pushing block 103 to rotate and reset along the rotating shaft 102 under the force and return to the limiting groove 104.

[0019] The beneficial effect of the present invention is that the present invention adopts an ejection mechanism for preventing the product from sticking to the angled pin. The angled pin 101 is provided with a rotating shaft 102, and the pushing block 103 provided on the rotating shaft 102 can rotate around the rotating shaft 102 under the action of the limiting groove 104 when the angled pin 101 ejects and takes out the product 20, so as to push the undercut 30 of the product 20 out of the side of the angled pin 101, avoiding the phenomenon that the product 20 sticks to the angled pin 101. This mechanism occupies a small space in the mold, has a simple structure and is easy to process.

[0020] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made by any person skilled in the art to the above embodiments based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. An ejection mechanism for preventing a product from sticking to an angle pin, characterized in that Including: A male mold core, in which a lifter pin is provided. One end of the lifter pin is fixed on a ejector rod, which is used to withdraw from the undercut of the product and eject the product under the action of the ejector rod. One side of the lifter pin is shaped to match the undercut of the product for forming the undercut of the product. A rotating shaft is provided in the lifter pin, and a push block is movably arranged on the rotating shaft. When the lifter pin is ejected by the ejector rod, the push block can rotate around the rotating shaft under the action of a limiting groove, for ejecting the side of the undercut of the product that contacts the lifter pin; A female mold core, which is matched with the male mold core for forming a product.

2. The ejection mechanism for preventing a product from sticking to an angle pin according to claim 1, characterized in that: There are two groups of the push blocks, which can not only save materials but also balance the pushing of the undercut of the product to withdraw from the lifter pin.

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