CN211891747U

CN211891747U - Structure for preventing ejection and cracking of injection mold

Info

Publication number: CN211891747U
Application number: CN201922478400.4U
Authority: CN
Inventors: 何中英; 姚纪荣; 刘斌; 周甫芝
Original assignee: Jiangsu Lide Precision Mould Co ltd
Current assignee: Jiangsu Lide Precision Mould Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-10
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a structure for preventing an injection mold from ejecting and cracking, which adopts a secondary ejection mode, is limited by a stop block, drives a mold insert by a top block when opening the mold, firstly ejects a deeper part for 5mm by the mold insert, stops the bottom of the mold insert at the moment, does not move, and then continues to eject by a thimble and the top block to complete the demolding; this design adopts secondary ejection mechanism, leans on the spacing darker shaping position of ejecting for the first time, leans on the ejecting realization product drawing of patterns of second time, guarantees the production intensity and the tolerance of structure on the basis that the product deviates from smoothly, guarantees that the product is not pulled and splits by drawing force, simple structure, and design benefit can effectively guarantee the product yield, improves mould life, saves enterprise's resource, creates bigger productivity effect.

Description

Structure for preventing ejection and cracking of injection mold

Technical Field

The utility model relates to a prevent ejecting structure of fracture of injection mold belongs to injection mold technical field.

Background

From the development direction of the current automobile injection mold, the structure of an injection molding product becomes more and more complex, the requirements on the appearance and the function of the product are higher and higher, and the injection mold is more and more widely applied to the production of automobile exterior trimming parts. Because in the forming process, the product has the packing power to the mould profiled surface, therefore the design of the ejecting structure of injection mold directly influences the quality of product, and the ejecting structure of present injection mold has following defect: the product produces the packing power to the shaping position in the cooling process, when product and mould shaping part area of contact is great, will lead to the drawing of patterns difficulty, arouses the product to pull to split easily during ejecting, increases manufacturing cost, seriously influences the productivity effect.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prevent ejecting structure of ftractureing of injection mold is used for overcoming among the prior art when product and mould shaping part area of contact are great, the easy ejecting defect that arouses to draw and split of product.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model discloses a prevent ejecting structure of fracture of injection mold, including the mould casing, mould benevolence is inlayed on the upper portion of mould casing, and its below passes through the fastener with secondary thimble panel and is connected, inlay the inside kicking block that is equipped with of mould benevolence, secondary thimble panel's below is equipped with secondary thimble bottom plate, secondary thimble panel with be equipped with the shifting block between the secondary thimble bottom plate, one side of shifting block is equipped with the dog, and the opposite side is equipped with the spring, one side of secondary thimble bottom plate is equipped with hits the piece, the inside of mould casing is equipped with the mold insert thimble, and the thimble passes secondary thimble bottom plate, secondary thimble panel, mould casing and last mould benevolence in proper order, thimble one side is equipped with the mold insert.

Furthermore, an edge chamfer is arranged at the contact position of the stop block and the shifting block, the edge chamfer can simultaneously meet the requirements of demoulding direction and tangential movement, and the shifting block is reset by a spring.

Furthermore, the shifting block moves along the demoulding direction along with the secondary thimble panel, and simultaneously moves along the tangential direction of the secondary thimble panel, and simultaneously completes limiting with the stop block, and the insert thimble on the secondary thimble bottom plate completes primary ejection.

Further, the insert ejector pin drives the insert to move upwards under the pushing of the secondary ejector pin bottom plate, and the stroke is 5 mm.

The utility model discloses the beneficial effect who reaches is: this design adopts secondary ejection mechanism, leans on the spacing darker shaping position of ejecting for the first time, leans on the ejecting realization product drawing of patterns of second time, guarantees the production intensity and the tolerance of structure on the basis that the product deviates from smoothly, guarantees that the product is not pulled and splits by drawing force, simple structure, and design benefit can effectively guarantee the product yield, improves mould life, saves enterprise's resource, creates bigger productivity effect.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a sectional structure view of the utility model a.

In the figure: 1. a thimble; 2. a secondary thimble panel; 3. a top block; 4. a spring; 5. a secondary thimble bottom plate; 6. bumping the block; 7. shifting blocks; 8. a stopper; 9. an insert thimble; 10. an upper die core; 11. an insert; 12. a mold housing.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example 1

As shown in fig. 1-2, a structure for preventing an injection mold from ejecting and cracking comprises a mold shell 12, an upper mold core 10 is embedded in the upper portion of the mold shell 12, the lower portion of the upper mold core is connected with a secondary ejector pin panel 2 through a fastener, an ejector block 3 is arranged inside the upper mold core 10, a secondary ejector pin bottom plate 5 is arranged below the secondary ejector pin panel 2, a shifting block 7 is arranged between the secondary ejector pin panel 2 and the secondary ejector pin bottom plate 5, a stop block 8 is arranged on one side of the shifting block 7, a spring 4 is arranged on the other side of the shifting block, a collision block 6 is arranged on one side of the secondary ejector pin bottom plate 5, an insert ejector pin 9 is arranged inside the mold shell 12, an ejector pin 1 sequentially penetrates through the secondary ejector pin bottom plate 5, the secondary ejector pin panel 2, the mold shell 12 and the upper.

An edge chamfer is arranged at the contact position of the stop block 8 and the shifting block 7, the edge chamfer can simultaneously meet the requirements of demoulding direction and tangential movement, the shifting block 7 is reset by the spring 4, the shifting block 7 is pushed to move upwards by the collision block 6, the shifting block 7 moves in the tangential direction under the action of the stop block 8, the insert ejector pin 9 drives the insert 11 to move upwards under the pushing action of the secondary ejector pin bottom plate 5, the stroke is 5mm, when the collision block 6 contacts with the stop block 8, the insert 11 is limited by the upper mold core 10, the first ejection is completed, and then the ejector pin 1 and the insert 3 continue to eject until the product is demoulded smoothly. The invention can effectively realize the secondary ejection of the deep cavity part and prevent the product from cracking during ejection due to excessive tightening force.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a prevent ejecting structure of fracture of injection mold, its characterized in that, includes the mould casing, mould benevolence is inlayed on the upper portion of mould casing, and its below passes through the fastener with secondary thimble panel and is connected, inlay the inside kicking block that is equipped with of mould benevolence, secondary thimble panel's below is equipped with secondary thimble bottom plate, secondary thimble panel with be equipped with the shifting block between the secondary thimble bottom plate, one side of shifting block is equipped with the dog, and the opposite side is equipped with the spring, one side of secondary thimble bottom plate is equipped with hits the piece, the inside of mould casing is equipped with the mold insert thimble, and the thimble passes secondary thimble bottom plate, secondary thimble panel, mould casing and last mould benevolence in proper order, thimble one side.

2. The structure for preventing the ejection and the cracking of the injection mold according to claim 1, wherein an edge chamfer is arranged at the contact position of the stop block and the shifting block, the edge chamfer can simultaneously meet the requirements of demolding direction and tangential movement, and the shifting block is reset by a spring.

3. The structure for preventing the ejection and cracking of the injection mold according to claim 1, wherein the shifting block moves along the demolding direction along with the secondary ejector pin panel and moves along the tangential direction of the secondary ejector pin panel, and the shifting block and the stop block simultaneously complete the limiting, and the insert ejector pin on the secondary ejector pin bottom plate completes the first ejection.

4. The structure for preventing the ejection and cracking of the injection mold according to claim 1, wherein the insert ejector pin drives the insert to move upwards by 5mm under the pushing of the secondary ejector pin bottom plate.