CN202491369U - Finger cam mechanism - Google Patents

Abstract

The utility model provides an oblique pin mechanism, which is applied in a plastic mold to form a plastic product with an inner barb. The inner barb of the product has a functional undercut and the upper part of the functional undercut is It has a side hole, and it is characterized in that the oblique pin mechanism includes: a first oblique pin, the oblique pin head at the upper end withdraws from the inner barb forming the plastic product; a slider, which is slidably arranged on the plastic mold On the outside of the product cavity, its front end has a protruding structure forming the side hole; a second oblique pin, which is obliquely slidably connected to the oblique pin head of the first oblique pin, and the second oblique pin The pin withdraws from the functional undercut on the inner barb, and its front end surface conflicts with the front end surface of the raised structure of the slider when the mold is closed. The oblique pin mechanism of the utility model overcomes the defect that the oblique pin mechanism in the prior art cannot withdraw from the functional undercut on the inner barb of the product, and has a simple structure and convenient processing.

Description

Slant pin mechanism

【Technical field】

The utility model relates to a plastic mold mechanism, in particular to an oblique pin mechanism of the plastic mold.

【Background technique】

In the injection molding production of plastic products, when the inner side of the plastic product has a barb, it is often withdrawn from the molding through an inclined pin. However, when the inner barb of the plastic product has a functional undercut and the top of the functional undercut is When there is a side hole, the side hole can be withdrawn from the molding through the outer slide block, but the functional undercut cannot be withdrawn by using the oblique pin mechanism of the prior art.

Please refer to FIG. 1 , which shows a schematic structural view of a plastic product. The plastic product 10 has an inner barb 11 , and has a functional undercut 12 on the inner barb 11 , and has a side hole 13 above the functional undercut 12 . Adopting the oblique pin mechanism of the prior art cannot exit the functional undercut 12, which brings difficulties to the mold design.

【Content of invention】

In view of this, the purpose of the utility model is to provide an oblique pin mechanism, which can withdraw from the functional undercut on the product barb, has a simple structure and is easy to process, so as to overcome the defects of the prior art oblique pin mechanism.

In order to achieve the above purpose, the utility model provides a kind of oblique pin mechanism, which is applied in a plastic mold to eject and form a plastic product with an inner barb. The inner barb of the product has a functional undercut and the functional There is also a side hole above the undercut, which is characterized in that the oblique pin mechanism includes:

A first slanted pin, the slanted pin head at its upper end withdraws from the inner barb forming the plastic product;

A slider, which is slidably arranged on the outside of the product cavity of the plastic mold, and has a protruding structure forming the side hole at its front end;

A second oblique pin, the second oblique pin is obliquely slidably connected to the oblique pin head of the first oblique pin, the second oblique pin withdraws from the functional undercut on the inner barb, and when the mold is closed, it The front end surface is in conflict with the front end surface of the protruding structure of the slider.

Preferably, the oblique pin head of the first oblique pin is provided with an oblique sliding slot, and the second oblique pin is slidably connected in the oblique sliding slot.

Preferably, a waist-shaped groove is also provided on the second oblique pin, and a position-limiting structure is fixed on the oblique-pin head of the first oblique pin corresponding to the waist-shaped groove, and the position-limiting structure slides through the Waist-shaped groove to limit the sliding distance of the second oblique pin. More preferably, the limiting structure is a pin, one end of which is fixed on the oblique pin head of the first oblique pin, and the other end slides through the waist-shaped groove of the second oblique pin to limit the second oblique pin. The sliding distance of the pin.

When the mold is opened, the slider first exits the side hole of the plastic product to the outside of the mold, and then the first oblique pin is pushed out obliquely upwards to exit the inner barb of the plastic product. The second oblique pin is due to the functional inverted The blocking of the buckle temporarily fails to withdraw and slides obliquely relative to the first oblique pin; after the first oblique pin withdraws from the inner barb, an empty space is created, and the second oblique pin gradually withdraws from the functional undercut, and With the first angled pin fully exiting the inboard barb.

When the mold is closed, the first oblique pin is returned by the forced return mechanism of the mould, and then the slider slides back to the inside of the mould, and the front end surface of the protruding structure at the front end collides with the front end surface of the second oblique pin This pushes the second skew pin back into place.

Compared with the prior art, the oblique pin mechanism of the utility model adopts a segmented withdrawal method, the first oblique pin first withdraws from the inner barb of the product, and the second oblique pin then withdraws from the functional undercut of the product, overcoming The defect that the oblique pin mechanism in the prior art cannot exit the functional undercut on the inner barb of the product is simple in structure and convenient in processing.

【Description of drawings】

FIG. 1 is a schematic partial cross-sectional view of a plastic product.

Fig. 2 is a perspective cross-sectional schematic view of a preferred embodiment of the oblique pin mechanism of the present invention before it is withdrawn from the product.

Fig. 3 is an exploded view of a preferred embodiment of the oblique pin mechanism of the present invention.

Fig. 4 is a schematic cross-sectional view of the oblique pin mechanism of the present invention when it is clamped in a preferred embodiment.

Fig. 5 is a schematic cross-sectional view of the inclined pin mechanism of the present invention when the mold is opened in a preferred embodiment.

【Detailed ways】

The utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.

With reference to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the utility model provides a kind of oblique pin mechanism, and it is applied in a plastic mold to exit and form a plastic product 10 with inner barb 11, and this inner barb 11 has a functional undercut 12 and there is a side hole 13 above the functional undercut 12. It is characterized in that the oblique pin mechanism includes:

A first oblique pin 200, the oblique pin head at its upper end withdraws from the inner barb 11 of the plastic product 10 formed;

A slider 100, which is slidably arranged on the outside of the product cavity of the plastic mould, has a protruding structure forming the side hole at its front end;

A second oblique pin 300, the second oblique pin 300 is obliquely slidably connected to the oblique pin head of the first oblique pin 200, the second oblique pin 300 exits the functional undercut on the inner barb 11 12. The front end surface of the slider 100 is in conflict with the front end surface of the raised structure when the mold is closed.

In this embodiment, the oblique pin head 200 of the first oblique pin defines an oblique sliding groove 220 , and the second oblique pin 300 is slidably connected in the oblique sliding groove 220 . A waist-shaped groove 310 is also provided on the second oblique pin 300 , and a pin 400 is fixed on the oblique pin head of the first oblique pin 200 corresponding to the waist-shaped groove 310 , and one end thereof is fixed by a headless screw 500 . On the oblique pin head of the first oblique pin 200 , the other end slides through the waist-shaped groove 310 of the second oblique pin 300 to limit the sliding distance of the second oblique pin 300 .

Please refer to Fig. 4, when the mold is closed, the first oblique pin 200 is returned by the forced return mechanism of the mold, and then the slider 100 slides back to the inside of the mold, and the front surface of the protruding structure at the front end resists the The front end of the second oblique pin 300 pushes the second oblique pin 300 back to its position. The first oblique pin 200 and the second oblique pin 300 cooperate to form the inner barb 11 and the functional undercut 12 of the plastic product 10 , and the slider 100 cooperates to form the outer barb of the plastic product 10 .

Please refer to FIG. 5 , when the mold is opened, the slider 100 first exits the side hole 13 of the product 10 to the outside of the mold, and then the first oblique pin 200 obliquely pushes out so as to withdraw from the inner barb 11 of the product 10, the The second oblique pin 300 cannot withdraw temporarily due to the blocking of the functional undercut 12, so it slides obliquely relative to the first oblique pin 200; after the first oblique pin 200 withdraws from the inner barb, an empty space is generated, and the second oblique pin The oblique pin 300 begins to withdraw from the functional undercut 12 gradually until the rear end of the waist-shaped groove 310 buckles the pin 400. When the first oblique pin 200 continues to withdraw, under the restriction of the pin 400, the second The two oblique pins 300 then move toward the inner side of the product and completely withdraw from the functional undercut 12 and the inner side barb 11 of the product. Thus, the purpose of withdrawing and forming the inner barb 11 and the functional undercut 12 of the plastic product 10 is achieved through the segmental withdrawal of the first oblique pin 200 and the second oblique pin 300 .

Compared with the prior art, the oblique pin mechanism of the utility model adopts a segmented withdrawal method, the first oblique pin first withdraws from the inner barb of the product, and the second oblique pin then withdraws from the functional undercut of the product, overcoming The defect that the oblique pin mechanism in the prior art cannot exit the functional undercut on the inner barb of the product is simple in structure and convenient in processing.

Claims (4)

1. An oblique pin mechanism, which is applied in a plastic mold to eject a plastic product with an inner barb. The inner barb of the product has a functional undercut and the top of the functional undercut has a The side hole is characterized in that the oblique pin mechanism includes: A first slanted pin, the slanted pin head at its upper end withdraws from the inner barb forming the plastic product; A slider, which is slidably arranged on the outside of the product cavity of the plastic mold, and has a protruding structure forming the side hole at its front end; A second oblique pin, the second oblique pin is obliquely slidably connected to the oblique pin head of the first oblique pin, the second oblique pin withdraws from the functional undercut on the inner barb, and when the mold is closed, it The front end surface is in conflict with the front end surface of the protruding structure of the slider. 2 . The oblique pin mechanism according to claim 1 , wherein the oblique pin head of the first oblique pin defines an oblique sliding groove, and the second oblique pin is slidably connected in the oblique sliding groove. 3 . 3. The oblique pin mechanism according to claim 1 or 2, characterized in that, the second oblique pin is also provided with a waist-shaped groove, and the position of the oblique pin head of the first oblique pin corresponding to the waist-shaped groove is fixed. A limiting structure is provided, and the limiting structure slides through the waist-shaped groove to limit the sliding distance of the second oblique pin. 4. The oblique pin mechanism according to claim 3, wherein the limiting structure is a pin, one end of which is fixed on the oblique pin head of the first oblique pin, and the other end slides through the second oblique pin. In the waist-shaped groove of the oblique pin to limit the sliding distance of the second oblique pin.

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