CN216465983U

CN216465983U - Rear mold assembly of large flanging ejection injection mold of plastic part

Info

Publication number: CN216465983U
Application number: CN202122737849.5U
Authority: CN
Inventors: 李长安
Original assignee: Suzhou Changshuo Mould Technology Co ltd
Current assignee: Suzhou Changshuo Mould Technology Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-10
Anticipated expiration: 2031-11-10

Abstract

The utility model relates to a plastic piece large flanging ejection injection mold rear mold assembly which comprises a rear mold base plate, a cushion block, a rear mold plate and a rear mold insert, wherein an ejector plate is arranged between the rear mold plate and the rear mold base plate, forming surfaces are arranged on the front side and the right side of the rear mold insert, the ejector plate is provided with an ejector pin body and an oscillating bar, a forming block is arranged at the front end of the oscillating bar, the oscillating bar is hinged with the ejector plate, the hinged axis extends up and down, a guide hole is formed in the rear mold insert, a slide hole is formed in the forming block, a slide block is arranged in the slide hole, the slide block is provided with an ejector pin, an inclined ejector pin forming hole is formed in the left side of the forming block, a guide inclined surface is formed in the right side of the forming block, a limit plane is formed in the guide inclined surface, and the right end of the slide block is attached to the limit plane. According to the utility model, the molding block moves rightwards while moving forwards along with the plastic part in the demolding process through the inclined swing rod hinged with the ejector plate, and the sliding block moves leftwards and rightwards under the limitation of the limiting plane, so that the plastic part is ejected by the ejector rod, the flanging is effectively prevented from being adhered to a mold, and the yield is improved.

Description

Rear mold assembly of large-flanging ejection injection mold of plastic part

Technical Field

The utility model relates to an injection mold, in particular to a rear mold assembly of a large flanging and ejecting injection mold of a plastic part.

Background

Plastic parts, because of their good physical and chemical properties, are very widely used, especially in the product housing. Because outward appearance and installation needs, partial outward appearance working of plastics need set up great turn-ups, and when the turn-ups is thinner, the sticking die dynamics is great during the drawing of patterns, leads to the turn-ups to be stretch-bent, causes the product defective rate to rise.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a rear mold component of a large flanging ejection injection mold of a plastic part.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a rear die assembly of a plastic piece large flanging ejection injection die comprises a rear die base plate, a cushion block arranged on the front side of the rear die base plate, a rear die plate arranged on the front side of the cushion block, and a rear die insert arranged on the rear die plate, wherein an ejector plate capable of sliding back and forth is arranged between the rear die plate and the rear die base plate, forming surfaces are arranged on the front side and the right side of the rear die insert, the ejector plate is provided with an ejector pin body and an oscillating bar which penetrate through the rear die plate and the rear die insert, a forming block is arranged at the front end of the oscillating bar, the forming block is spliced with the rear die insert into a complete rear forming surface in a die assembly state, the forming block is spliced on the left side of the front forming surface of the rear die insert, the oscillating bar is hinged with the ejector plate, the hinging axis extends up and down, the oscillating bar extends towards the right front side, and a guide hole matched with the oscillating bar is arranged on the rear die insert, the shaping piece is equipped with the slide opening of controlling the extension, be equipped with the slider in the slide opening, the slider is equipped with the ejector pin that extends left, shaping piece left side is equipped with oblique fore-set shaping hole, oblique fore-set shaping hole with the ejector pin is coaxial just the ejector pin left end extends to in the oblique fore-set shaping hole, the shaping piece right side is equipped with and is on a parallel with the guide inclined plane of pendulum rod axis direction, the guide inclined plane is equipped with the spacing plane that is on a parallel with the die sinking direction, the slider right-hand member with spacing plane laminating, the slider with be equipped with the elastic component that resets between the shaping piece, it is right to reset the elastic component the slider is applyed elasticity rightwards.

In the design, the forming block moves rightwards along with the plastic part in the process of demoulding through the inclined swing rod hinged with the ejector plate, the sliding block moves leftwards and rightwards under the limit of the limiting plane, and then the ejector rod is used for ejecting the flanging of the plastic part, so that the flanging is effectively prevented from being stuck to the die, and the yield is improved.

As a further improvement of the design, the reset elastic piece is a spring, has a simple structure, and is convenient for the ejector rod to return and separate from the flanging at the later stage of demoulding.

As a further improvement of the design, the cross section of the swing rod is rectangular, so that the swing rod is effectively prevented from twisting, a hinged shaft of the swing rod is prevented from being subjected to twisting force, and the position precision of the forming block is improved.

As a further improvement of the design, the forming block is provided with a limit screw rod extending left and right, the sliding block is provided with a stepped hole matched with the limit screw rod, the right end of the stepped hole is provided with a large hole, and the large end of the limit screw rod is positioned in the large hole of the stepped hole. The limit screw effectively limits the stroke of the sliding block and prevents the sliding block from sliding out of the sliding hole.

The utility model has the beneficial effects that: according to the utility model, the forming block moves forwards along with a plastic part and moves rightwards at the same time through the swing rod which is inclined and hinged with the ejector plate in the demoulding process, and the sliding block moves leftwards and rightwards under the limitation of the limiting plane, so that the ejection of the ejector rod to the flanging of the plastic part is realized, the flanging die sticking is effectively prevented, and the yield is improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is an overall sectional structure diagram of the present invention.

Fig. 2 is a partial cross-sectional view of a forming block and a rear die insert of the present invention.

Fig. 3 is a schematic perspective view of the rear die insert of the present invention.

In the figure, 1, a rear die base plate, 2, an ejector pin plate, 3, a swing rod, 4, a rear die plate, 5, a rear die insert, 6, a sliding block, 7, a forming block, 8, a cushion block, 9, a limiting screw rod, 10, an inclined ejector pin forming hole, 11, a reset elastic piece, 12, a sliding hole, 13, an ejector pin, 14, a stepped hole, 15, an ejector pin body, 16, a guide hole, 17, a limiting plane, 18, a guide inclined plane and 19 are rear molding surfaces.

Detailed Description

The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are only intended to illustrate the present invention, but not to limit the present invention.

The embodiment is as follows: a rear die assembly of a large-flanging injection mold of plastic parts comprises a rear die base plate 1, a cushion block 8 arranged on the front side of the rear die base plate 1, a rear die plate 4 arranged on the front side of the cushion block 8, and a rear die insert 5 arranged on the rear die plate 4, wherein a front and rear sliding ejector pin plate 2 is arranged between the rear die plate 4 and the rear die base plate 1, forming surfaces are arranged on the front side and the right side of the rear die insert 5, the ejector pin plate 2 is provided with an ejector pin body 15 and an oscillating bar 3 which penetrate through the rear die plate 4 and the rear die insert 5, a forming block 7 is arranged at the front end of the oscillating bar 3, the forming block 7 is spliced with the rear die insert 5 into a complete rear forming surface 19 in a mold closing state, the oscillating bar 3 is hinged with the ejector pin plate 2 and the hinged axis extends up and down, the front of the oscillating bar 3 extends rightwards, a guide hole 16 matched with the oscillating bar 3 is arranged on the rear die insert 5, the rear die insert is characterized in that the forming block 7 is spliced on the left side of a forming surface on the front side of the rear die insert 5, a sliding hole 12 extending left and right is formed in the forming block 7, a sliding block 6 is formed in the sliding hole 12, the sliding block 6 is provided with an ejector rod 13 extending left, an oblique ejector column forming hole 10 is formed in the left side of the forming block 7, the oblique ejector column forming hole 10 is coaxial with the ejector rod 13, the left end of the ejector rod 13 extends into the oblique ejector column forming hole 10, a guide inclined plane 18 parallel to the axial direction of the oscillating rod 3 is formed in the right side of the forming block 7, a limiting plane 17 parallel to the die opening direction is formed in the guide inclined plane 18, the right end of the sliding block 6 is attached to the limiting plane 17, a reset elastic part 11 is arranged between the sliding block 6 and the forming block 7, and the reset elastic part 11 applies right elastic force to the sliding block 6.

In the design, the forming block 7 moves rightwards while moving forwards along with the plastic part through the inclined swing rod 3 hinged with the ejector plate 2 in the demolding process, the sliding block 6 moves leftwards and rightwards under the limitation of the limiting plane 17, and then the ejector rod 13 is used for ejecting the flanging of the plastic part, so that the flanging is effectively prevented from being adhered to a mold, and the yield is improved.

As a further improvement of the design, the reset elastic piece 11 is a spring, has a simple structure, and is convenient for the ejector rod 13 to retreat and separate from the flanging at the later stage of demoulding.

As a further improvement of the design, the cross section of the swing rod 3 is rectangular, so that the swing rod 3 is effectively prevented from twisting, a hinged shaft of the swing rod 3 is prevented from being subjected to twisting force, and the position precision of the forming block 7 is improved.

As a further improvement of the design, a limit screw 9 extending left and right is arranged on the forming block 7, a stepped hole 14 matched with the limit screw 9 is arranged on the sliding block 6, the right end of the stepped hole 14 is a large hole, and the large end of the limit screw 9 is positioned in the large hole of the stepped hole 14. The limit screw 9 effectively limits the stroke of the sliding block 6 and prevents the sliding block 6 from sliding out of the sliding hole 12.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A rear die assembly of a plastic part large flanging ejection injection die comprises a rear die base plate, a cushion block arranged on the front side of the rear die base plate, a rear die plate arranged on the front side of the cushion block, and a rear die insert arranged on the rear die plate, wherein an ejector plate capable of sliding back and forth is arranged between the rear die plate and the rear die base plate, and forming surfaces are arranged on the front side and the right side of the rear die insert, the shaping piece is equipped with the slide opening of controlling the extension, be equipped with the slider in the slide opening, the slider is equipped with the ejector pin that extends left, shaping piece left side is equipped with oblique fore-set shaping hole, oblique fore-set shaping hole with the ejector pin is coaxial just the ejector pin left end extends to in the oblique fore-set shaping hole, the shaping piece right side is equipped with and is on a parallel with the guide inclined plane of pendulum rod axis direction, the guide inclined plane is equipped with the spacing plane that is on a parallel with the die sinking direction, the slider right-hand member with spacing plane laminating, the slider with be equipped with the elastic component that resets between the shaping piece, it is right to reset the elastic component the slider is applyed elasticity rightwards.

2. The back mold assembly of a large flanging and ejecting injection mold of a plastic part as claimed in claim 1, wherein the return elastic member is a spring.

3. The plastic part large flange post-ejection injection mold assembly of claim 1, wherein the swing link is rectangular in cross section.

4. The plastic part large flanging back-ejection injection mold assembly as claimed in claim 1, wherein the forming block is provided with a limit screw rod extending left and right, the slide block is provided with a stepped hole matched with the limit screw rod, the right end of the stepped hole is provided with a large hole, and the large end of the limit screw rod is positioned in the large hole of the stepped hole.