CN220409760U

CN220409760U - Demoulding mechanism for bar pin

Info

Publication number: CN220409760U
Application number: CN202321891811.6U
Authority: CN
Inventors: 陈刚
Original assignee: Ningbo Yinzhou Kainuo Metal Products Co ltd
Current assignee: Ningbo Yinzhou Kainuo Metal Products Co ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2024-01-30
Anticipated expiration: 2033-07-18

Abstract

The utility model relates to the technical field of demolding, in particular to a demolding mechanism for a strip pin. The automatic ejection mechanism comprises a base (1), a lower die (2) fixed on the base (1), an upper die (3) matched with the lower die (2) and an ejection mechanism (4) which is slidably connected in the base (1) and used for ejecting a strip pin (15), wherein the ejection mechanism (4) comprises three ejector rods, and three through holes which are respectively used for the three ejector rods to extend into so as to eject the strip pin (15) are formed in the lower die (2). The demoulding mechanism has lower defective rate.

Description

Demoulding mechanism for bar pin

Technical Field

The utility model relates to the technical field of demolding, in particular to a demolding mechanism for a strip pin.

Background

The strip pin is an automobile part, and the strip pin in the prior art is ejected through one ejector rod after being molded, so that the ejected strip pin is possibly damaged due to uneven overall stress, and the overall defective rate is higher.

Disclosure of Invention

The technical scheme to be solved by the utility model is as follows: provided is a stripping mechanism for a bar pin, which has a low defective rate.

The technical scheme adopted by the utility model is as follows: the utility model provides a demoulding mechanism for bar round pin, it includes the base, fixes the lower mould on the base, with lower mould complex go up mould and sliding connection be used for ejecting ejection mechanism with the bar round pin in the base, ejection mechanism includes three ejector pins, be provided with three respectively on the lower mould and supply three ejector pins to stretch into and then ejecting bar round pin's through-hole.

Preferably, the three through holes correspond to the front end position, the middle position and the rear end position of the bar pin, respectively, and are located on a straight line.

Preferably, the strip pin comprises a front plate part, an annular connecting part, a middle barrel part and a rear plate part, the through holes comprise a first through hole, a second through hole and a third through hole, the first through hole corresponds to the middle position of the front plate part, the second through hole corresponds to the middle position of the middle barrel part, and the third through hole corresponds to the middle position of the rear plate part.

Preferably, the first through hole and the third through hole are round holes, the second through hole is a square hole, the ejector rods are respectively a first ejector rod, a second ejector rod and a third ejector rod, the first ejector rod and the third ejector rod are round rods matched with the first through hole and the third through hole, and the second ejector rod is a square rod matched with the second through hole.

Preferably, the length of the cross section of the second ejector rod along the length direction of the bar pin is A, the cross section diameters of the first ejector rod and the third ejector rod are B, and A is more than B.

Preferably, the upper end surface of the second ejector rod is a concave surface matched with the shape of the middle cylinder part.

Compared with the prior art, the utility model has the following advantages: the three ejector rods are adopted to eject the strip pins, so that the stress is uniform, the ejection effect is good, and the ejected product defective rate is low.

The three through holes are arranged on the same straight line, which is equivalent to arranging the three ejector rods on the same straight line, so that the stress of the bar pin is more uniform.

The position that will push up the pole to sets up in the middle part of each subassembly, and each part atress is even like this, and is difficult to the top and hinder, and then makes the defective rate of product lower.

The middle ejector rod is arranged to be a square rod, so that the stressed area is larger, the stressed force is more uniform, and the product is less prone to being damaged when being ejected.

The size of the middle ejector rod is larger, so that the whole stressed area of the middle ejector rod is larger, and the product is not easy to damage when being ejected.

The shape of the upper end face of the middle ejector rod is matched with that of the middle cylinder part, so that the middle cylinder part can be better propped against, and a product is ejected out.

Drawings

FIG. 1 is an exploded schematic view of a stripping mechanism for a bar pin according to the present utility model.

Fig. 2 is a schematic structural view of the bar pin.

Fig. 3 is a schematic view of the structure of a lower die in the stripping mechanism for a bar pin according to the present utility model.

Fig. 4 is a schematic view of the structure of an ejector mechanism in the ejector mechanism for a bar pin according to the present utility model.

1, a base; 2. a lower die; 3. an upper die; 4. an ejection mechanism; 5. a first ejector rod; 6. a second ejector rod; 7. a third ejector rod; 8. a first through hole; 9. a second through hole; 10. a third through hole; 11. a front plate portion; 12. an annular connecting part; 13. a middle tube part; 14. a rear plate portion; 15. a bar pin.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Embodiment one:

the utility model provides a demoulding mechanism for bar round pin, as shown in fig. 1, includes base 1, lower mould 2, go up mould 3 and ejection mechanism 4, wherein:

the bar pin 15, as shown in fig. 2, includes a front plate 11, an annular connecting portion 12, a middle tube 13, and a rear plate 14 in this order from left to right, and the lower end surfaces of the front plate 11 and the rear plate 14 are flat surfaces, and the middle tube 13 is cylindrical in shape as a whole, so that its lower end is an arc surface;

the middle part of the base 1 is provided with a chute for the ejection mechanism 4 to slide vertically;

the lower die 2 is fixed on the base 1, the shape of the upper end surface is matched with the strip pin 15, three through holes are formed in the lower die, namely a first through hole 8, a second through hole 9 and a third through hole 10, the positions of the first through hole 8 correspond to the middle position of the front plate part 11, the positions of the second through hole 9 correspond to the middle position of the middle cylinder part 13, and the positions of the third through hole 10 correspond to the middle position of the rear plate part 14;

the ejection mechanism 4, as shown in fig. 4, comprises a base and three ejector rods, the base can vertically slide on the sliding groove of the lower die 2, the three ejector rods are arranged on the base, namely a first ejector rod 5, a second ejector rod 6 and a third ejector rod 7, the first ejector rod 5 can pass through the first through hole 8 to abut against the front plate part 11 of the bar pin 15, the second ejector rod 6 can pass through the second through hole 9 to abut against the middle barrel part 13 of the bar pin 15, and the third ejector rod 7 can pass through the third through hole 10 to abut against the rear plate part 14 of the bar pin 15.

The working principle of the embodiment is as follows: the upper die 3 is pressed down to a position matched with the lower die 2 to form a product, then the upper die 3 is lifted, and then the ejection mechanism 4 drives the three ejector rods to move upwards to eject the product upwards at the three positions, so that the product is ejected.

Embodiment two:

the difference between the first embodiment and the second embodiment is that the second through hole 9 is a square hole, the first through hole 8 and the third through hole 10 are round holes, the second ejector rod 6 is a square rod matched with the square hole, the first ejector rod 5 and the third ejector rod 7 are round rods matched with the round holes, the length of the second through hole 9 along the length direction of the bar pin 15 is A, the diameters of the first through hole 8 and the third through hole 10 are B, and A is greater than B, thus the size of the second ejector rod 6 is larger, the middle part of the bar pin 15 can be better propped against, and the bar pin 15 can be better ejected.

Embodiment III:

the difference from the second embodiment is that the upper end surface of the second ejector rod 6 in the third embodiment is a concave surface matched with the middle cylinder portion 13, so that the contact area between the second ejector rod 6 and the bar pin 15 is larger, and the force is more uniform during ejection.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the utility model. Any and all equivalents and alternatives falling within the scope of the claims are intended to be embraced therein.

Claims

1. The utility model provides a demoulding mechanism for bar round pin which characterized in that: the automatic ejection mechanism comprises a base (1), a lower die (2) fixed on the base (1), an upper die (3) matched with the lower die (2) and an ejection mechanism (4) which is slidably connected in the base (1) and used for ejecting a strip pin (15), wherein the ejection mechanism (4) comprises three ejector rods, and three through holes which are respectively used for the three ejector rods to extend into so as to eject the strip pin (15) are formed in the lower die (2).

2. The stripping mechanism for strip pins as claimed in claim 1, wherein: the three through holes correspond to the front end position, the middle position and the rear end position of the bar pin (15) respectively, and are positioned on the same straight line.

3. The stripping mechanism for strip pins as claimed in claim 2, wherein: the strip-shaped pin (15) comprises a front plate part (11), an annular connecting part (12), a middle barrel part (13) and a rear plate part (14), wherein the through holes comprise a first through hole (8), a second through hole (9) and a third through hole (10), the first through hole (8) corresponds to the middle position of the front plate part (11), the second through hole (9) corresponds to the middle position of the middle barrel part (13), and the third through hole (10) corresponds to the middle position of the rear plate part (14).

4. A strip pin ejector mechanism according to claim 3, wherein: the first through holes (8) and the third through holes (10) are round holes, the second through holes (9) are square holes, the ejector rods are respectively a first ejector rod (5), a second ejector rod (6) and a third ejector rod (7), the first ejector rod (5) and the third ejector rod (7) are round rods matched with the first through holes (8) and the third through holes (10), and the second ejector rod (6) is a square rod matched with the second through holes (9).

5. The stripping mechanism for strip pins as claimed in claim 4, wherein: the length of the cross section of the second ejector rod (6) along the length direction of the strip-shaped pin (15) is A, the cross section diameters of the first ejector rod (5) and the third ejector rod (7) are B, and A is more than B.

6. The stripping mechanism for strip pins as claimed in claim 4, wherein: the upper end surface of the second ejector rod (6) is a concave surface matched with the shape of the middle cylinder part (13).