CN219381437U

CN219381437U - Mould ejection mechanism and injection mold

Info

Publication number: CN219381437U
Application number: CN202320335552.2U
Authority: CN
Inventors: 陈锦超; 杨海明; 苏绿化
Original assignee: Saiertan Wuxi Electronics Co ltd
Current assignee: Saiertan Wuxi Electronics Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-07-21
Anticipated expiration: 2033-02-28

Abstract

The utility model provides a mold ejection mechanism and an injection mold, wherein the mold ejection mechanism comprises an ejector plate, a lower template, a molding core, an inclined ejector, a push plate and a straight ejector pin; the forming core is fixed on the lower die plate, the inclined ejector is slidably assembled on the forming core, the push plate can be assembled on the lower die plate in a vertically movable mode and is provided with a lateral limiting slot hole perpendicular to the vertical direction, the inclined ejector is provided with an inclined ejector transverse rod extending into the lateral limiting slot hole, the lower end of the straight ejector pin is connected with the ejector plate, and the upper end of the straight ejector pin penetrates through the lower die plate and is connected to the push plate. The push plate and the inclined ejector are designed into a combined type, the inclined ejector and the push plate are synchronous in ejection, and the phenomena of pull injury or pull cracking of products caused by asynchronous ejection of each ejection mechanism can be avoided.

Description

Mould ejection mechanism and injection mold

Technical Field

The utility model relates to the field of injection molds, in particular to a mold ejection mechanism and an injection mold with the same.

Background

The mould is a variety of moulds and tools used for injection moulding, blow moulding, extrusion, die casting or forging, smelting, stamping and other methods in industrial production to obtain the required products. Injection molding is to inject an injection molding material in a molten state into an injection mold and cool and solidify the injection molding material. And when demolding is carried out after injection molding, the product is ejected out by a thimble mechanism, and according to different product structures, the ejection mode generally comprises parallel ejection (the ejection direction is parallel to the mold opening direction) and inclined ejection (the ejection direction and the mold opening direction have a certain included angle).

In a structure of a shell and the like needing whole-surface ejection, an existing ejection mechanism is shown in fig. 1, an inclined ejector 2 for inclined ejection directly penetrates through a lower die plate 5 to be connected with an ejector plate 4, and a push plate 1 for parallel ejection is connected with the ejector plate 4 through a straight ejector pin 3; so arranged, the disadvantages are: 1. the inclined roof 2 is longer, a larger gap exists between the inclined roof 2 and the lower template 5, and the matching precision and the production stability are poor; 2. the push plate 1 and the inclined ejector are connected with the ejector plate 4 at the bottom, but are independent at the top, and in actual operation, the phenomenon of pulling injury or cracking of products caused by asynchronous ejection still can be caused.

Disclosure of Invention

To solve the above problems, the present utility model provides a mold ejection mechanism and an injection mold.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the utility model provides a mould ejection mechanism, includes thimble board, lower bolster, shaping core, oblique top, push pedal and straight thimble, the shaping core is fixed in on the lower bolster, the slidable assembly of oblique top in on the shaping core, the push pedal can the upper and lower activity assemble on the lower bolster and be formed with the lateral direction spacing slotted hole of perpendicular to upper and lower direction, the oblique top is provided with stretches into oblique top transverse rod in the lateral direction spacing slotted hole, the thimble board is connected to the lower extreme of straight thimble, its upper end pass the lower bolster connect in on the push pedal.

Further, the pushing plate is provided with a central window, the forming core and the inclined top are positioned in the central window of the pushing plate, and the opening of the lateral limiting slotted hole faces to the central window.

Further, the number of the inclined roofs is a plurality, and the inclined roofs are distributed on the inner peripheral side or the outer peripheral side of the molding core.

Further, the number of the straight ejector pins is multiple, and the plurality of straight ejector pins are connected to a plurality of end positions of the push plate.

Further, the push plate is provided with a mounting slot hole, the mounting slot hole is provided with an upper opening and a side opening, and the push plate further comprises a pressing block, and the pressing block is fixedly inserted into the upper opening of the mounting slot hole, so that the lateral limiting slot hole with the side opening is formed in a surrounding mode.

Further, the pressing block is locked on the pushing plate through a bolt.

Furthermore, the oblique top transverse rod is in clearance fit with the lateral limiting slotted hole, and the clearance value of the clearance fit is smaller than the edge overflow value of the injection molding material.

Furthermore, the connection position of the inclined roof and the inclined roof transverse rod is in arc chamfer transition.

Further, in the initial state that the inclined roof is not ejected, the bottom of the inclined roof is abutted against the lower die.

An injection mold at least comprises the mold ejection mechanism.

The technical scheme provided by the utility model has the following beneficial effects:

the inclined ejection is directly driven by the push plate, so that synchronous ejection with the push plate can be better realized, and the phenomena of strain or stretch cracking of products caused by asynchronous ejection can be avoided. And moreover, the inclined ejector does not need to penetrate through the lower die plate to be connected with the ejector pin plate, so that the matching precision and the production stability are effectively improved. Has the characteristics of simple structure and ingenious design.

Drawings

FIG. 1 is a schematic diagram of an ejector mechanism in the prior art;

FIG. 2 is a schematic diagram of a mold ejection mechanism in an embodiment;

fig. 3 is an exploded view of the mold ejector mechanism in the embodiment.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 2 and 3, the present embodiment provides a mold ejection mechanism, which includes an ejector plate 12, a lower die plate 11, a molding core 40, an inclined ejector 30, a push plate 20, and a straight ejector 50, wherein the ejector plate 12 is located below the lower die plate 11. The forming core 40 is fixed on the lower die plate 11, the inclined roof 30 is slidably assembled on the forming core 40, that is, an inclined guide surface is provided on the forming core 40, and the inclined roof 30 is slidably assembled on the inclined guide surface of the forming core 40, so as to realize the guiding of the inclined movement of the inclined roof 30.

The push plate 20 is movably assembled on the lower die plate 11 up and down, and is formed with a lateral limit slot 21 perpendicular to the up and down direction, that is, the lateral limit slot 21 extends in the horizontal direction, the oblique ejection 30 is provided with an oblique ejection transverse rod 31 extending into the lateral limit slot 21, the lower end of the straight ejection pin 50 is connected with the ejector plate 12, and the upper end thereof passes through the lower die plate 11 and is connected with the push plate 20.

When ejection is carried out, the ejector plate 12 drives the push plate 20 to eject upwards in parallel through the straight ejector pin 50, and the push plate 20 synchronously drives the inclined ejection transverse rod 31 of the inclined ejection 30 to move upwards in the ejection process, and finally synchronously drives the inclined ejection 30 to eject obliquely; when the reset is performed, the push plate 20 moves downwards, so that the inclined top transverse rod 31 is driven to move downwards, and the inclined top 30 is driven to move downwards synchronously. Thus, the inclined ejection 30 is driven by the push plate 20, and the parallel ejection of the push plate 20 and the inclined ejection of the inclined ejection 30 can be well synchronized, so that the phenomena of pull injury or pull crack of products caused by asynchronous ejection can be avoided. And moreover, the inclined roof 30 does not need to penetrate through the lower template 11 to be connected with the ejector plate 12, so that the matching precision and the production stability are effectively improved. Has the characteristics of simple structure and ingenious design.

Specifically, the oblique ejection transverse rod 31 is movable in the lateral limit slot 21, the lateral limit slot 21 moves up and down linearly along with the push plate 20, the oblique ejection transverse rod 31 moves up and down obliquely along with the oblique ejection 30, and when ejection or homing, the oblique ejection transverse rod 31 and the lateral limit slot 21 move relatively in the lateral direction, as long as the oblique ejection transverse rod 31 does not deviate from the lateral limit slot 21.

The push plate 20 has a central window, the shaped core 40 and the angled roof 30 are located in the central window of the push plate 20, and the lateral limiting slot 21 is open toward the central window. The number of the inclined crests 30 is plural, in this embodiment, two, and they are distributed on both sides of the outer periphery of the molding core 40. The number of the straight ejector pins 50 is plural, specifically four, and the four straight ejector pins 50 are connected to the four end positions of the push plate 20. In this way, the pushing force of the ejector plate 12 on the push plate 20 and the pushing force of the push plate 20 on the inclined ejector 30 are more uniform, and ejection synchronism is better, which is one of the preferred embodiments. Of course, in other embodiments, the forming core 40 and the inclined ejector 30 may be located at the side of the push plate 20, the number of the inclined ejectors 30 may be one or more than two, and the number of the straight ejector pins 50 may be one, three, etc.; when the molding core 40 is in a hollow structure in the middle, the plurality of inclined roofs 30 may be distributed on the inner peripheral side of the molding core 40.

Specifically, in this embodiment, the push plate 20 is provided with a mounting slot hole, the mounting slot hole has an upper opening and a side opening, and the push plate further includes a pressing block 60, and the pressing block 60 is fixedly inserted into the upper opening of the mounting slot hole, so as to jointly enclose the lateral limiting slot hole 21 having the side opening. The arrangement is convenient for the installation of the inclined top transverse plate 31, namely, when in installation, the inclined top transverse plate 31 is put into the installation slot hole from top to bottom through the upper opening, and then the pressing block 60 is put into the installation slot hole; in this way, the tightness of the pitched roof transverse plate 31 in the lateral limit slot 21 can also be adjusted by adjusting the pressing block 60.

In particular, the pressing block 60 is locked on the push plate 20 through a bolt, so that the structure is simple to assemble and the operation is simple.

The oblique top transverse rod 31 is in clearance fit with the lateral limiting slotted hole 21, and the clearance value of the clearance fit is smaller than the edge overflow value of the injection molding material. Thus, the relative movement of the oblique-top transverse rod 31 in the lateral limit slot 21 can be well ensured.

Further, the connection position 32 between the oblique top 30 and the oblique top transverse rod 31 is in a rounded arc transition so as to enhance the connection strength between the oblique top 30 and the oblique top transverse rod 31.

In the initial state where the inclined top 30 is not ejected, as shown in fig. 2, the bottom of the inclined top 30 abuts against the lower die 11. So set up, when filling plastics liquid, the sloping roof 30 is under the effect of filling pressure, and stability and the reliability of mould production of product size are ensured.

The embodiment also provides an injection mold, which at least comprises the mold ejection mechanism.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A die ejection mechanism comprises an ejector plate, a lower template, a molding core, an inclined ejector, a push plate and a straight ejector pin; the method is characterized in that: the forming core is fixed on the lower die plate, the inclined ejector is slidably assembled on the forming core, the push plate can be assembled on the lower die plate in a vertically movable mode and is provided with a lateral limiting slot hole perpendicular to the vertical direction, the inclined ejector is provided with an inclined ejector transverse rod extending into the lateral limiting slot hole, the lower end of the straight ejector pin is connected with the ejector plate, and the upper end of the straight ejector pin penetrates through the lower die plate and is connected to the push plate.

2. The mold ejection mechanism of claim 1, wherein: the push plate is provided with a central window, the forming core and the inclined roof are positioned in the central window of the push plate, and the opening of the lateral limiting slotted hole faces to the central window.

3. The mold ejection mechanism of claim 1 or 2, wherein: the number of the inclined tops is multiple, and the inclined tops are distributed on the inner peripheral side or the outer peripheral side of the molding core.

4. The mold ejection mechanism of claim 1 or 2, wherein: the number of the straight ejector pins is multiple, and the straight ejector pins are connected to the end positions of the push plate.

5. The mold ejection mechanism of claim 1, wherein: the push plate is provided with a mounting groove hole, the mounting groove hole is provided with an upper opening and a side opening, and the push plate further comprises a pressing block, wherein the pressing block is fixedly inserted into the upper opening of the mounting groove hole, and then the lateral limiting groove hole with the side opening is formed in a surrounding mode.

6. The mold ejection mechanism of claim 5, wherein: the pressing block is locked on the pushing plate through a bolt.

7. The mold ejection mechanism of claim 1 or 5, wherein: the oblique top transverse rod is in clearance fit with the lateral limiting groove hole, and the clearance value of the clearance fit is smaller than the edge overflow value of the injection molding material.

8. The mold ejection mechanism of claim 1, wherein: the connection position of the inclined roof and the inclined roof transverse rod is in arc chamfer transition.

9. The mold ejection mechanism of claim 1, wherein: and in the initial state that the inclined roof is not ejected, the bottom of the inclined roof is abutted against the lower die.

10. An injection mold, characterized in that: comprising at least a mould ejection mechanism according to any one of the preceding claims 1-9.