Ejection mechanism for mold

Abstract

The utility model discloses an ejection mechanism for a mold. The ejection mechanism comprises a mold core, a movable part and an ejector pin, a movable cavity is formed in the mold core, and a movable guide groove is formed in the inner wall of the movable cavity; a through hole is formed in the movable part, the inner end of the through hole is communicated with the movable guide groove, and an elastic part is arranged in the through hole; the ejector pin is arranged in the through hole in an inward-outward moving mode and elastically abuts against the elastic piece, and the contact end of the ejector pin extends out of the inner end of the through hole to make contact with the inner wall face of the movable guide groove. The movable piece is arranged in the movable cavity in a vertically movable mode, so that the silica gel product is not prone to being bonded to the movable piece, the groove depth of the movable guide groove is sequentially shortened from bottom to top, and the contact end of the ejector pin extends out of the inner end of the through hole to make contact with the inner wall face of the movable guide groove; the groove depths which are sequentially shortened from bottom to top promote the ejection end of the ejector pin to extend out of the outer end of the through hole and eject the product, the demolding difficulty of the silica gel product is reduced, and the silica gel product is not prone to deformation during demolding.

Description

Technical Field

[0001] The utility model relates to the technology of mold field, in particular to an ejection mechanism for a mold. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. It is known as the "mother of industry".

[0003] Silicone products made by injection molding tend to adhere to the mold, making it very difficult to demould the silicone products, and the silicone products tend to deform. Therefore, it is necessary to propose a new solution to improve the above problems. Utility Model Content

[0004] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a mold ejection mechanism, which can effectively solve the problem that the injection mold of the existing silicone product is easy to adhere to the silicone product, resulting in difficulty in demoulding and easy deformation during demoulding.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A mold ejection mechanism comprises a mold core, a movable part and an ejector pin; the mold core is provided with an movable cavity, the inner wall of the movable cavity is provided with a movable guide groove, the groove depth of the movable guide groove is shortened from bottom to top; the movable part can be movably arranged in the movable cavity, the movable part is provided with a through hole, the inner end of the through hole is connected with the movable guide groove, and an elastic part is arranged in the through hole; the ejector pin can be movably arranged in the through hole and elastically contact with the elastic part, the contact end of the ejector pin extends out of the inner end of the through hole and contacts with the inner wall surface of the movable guide groove, when the movable part moves downward to the position, the end face of the ejection end of the ejector pin is flush with the outer side surface of the movable part, and when the movable part moves upward to the position, the ejection end of the ejector pin extends out of the outer end of the through hole and ejects the product.

[0007] As a preferred solution, the elastic member is a spring.

[0008] As a preferred solution, the movable guide grooves are three arranged at intervals in the front and back, and correspondingly, the through holes are also three arranged at intervals in the front and back, the inner end of each through hole is connected to the corresponding movable guide groove, and there are also three ejector pins.

[0009] As a preferred solution, a limiting portion is protruding from the contact end of the ejector pin, and the radius of the limiting portion is larger than the inner radius of the through hole, and the radius of the limiting portion is larger than the outer radius of the through hole.

[0010] As a preferred solution, a fixing groove is concavely provided on the peripheral side surface of the mold core to cooperate with an external fixing mechanism for fixing.

[0011] As a preferred solution, there are four fixing grooves, and the four fixing grooves are respectively located at the peripheral edges of each side surface of the mold core.

[0012] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0013] The movable part can be movably arranged in the movable cavity up and down, so that the silicone product is not easy to adhere to the movable part. In combination with the groove depth of the movable guide groove being shortened from bottom to top, the contact end of the ejector pin extends out of the inner end of the through hole and contacts the inner wall surface of the movable guide groove. When the movable part moves upward into place, the groove depth that is shortened from bottom to top prompts the ejection end of the ejector pin to extend out of the outer end of the through hole and eject the product, thereby reducing the demoulding difficulty of the silicone product and preventing it from deforming during demoulding.

[0014] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an assembly perspective view of a preferred embodiment of the utility model;

[0016] Figure 2 It is an exploded view of a preferred embodiment of the utility model;

[0017] Figure 3 It is a cross-sectional view of a preferred embodiment of the utility model;

[0018] Figure 4 It is an enlarged schematic diagram of the mold core in the preferred embodiment of the utility model.

[0019] Description of the accompanying drawings:

[0020] 10. Mold core 11. Active cavity

[0021] 12. Movable guide groove 13. Fixed groove

[0022] 20. Movable parts 21. Through holes

[0023] 30. Ejector pin 31. Contact end

[0024] 32. Ejector end 33. Limiting part

[0025] 40. Elastic member 50. Product. DETAILED DESCRIPTION

[0026] Please refer to Figures 1 to 4 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a mold core 10, a movable part 20 and an ejector pin 30.

[0027] The mold core 10 is provided with an active cavity 11, and the inner wall of the active cavity 11 is provided with a movable guide groove 12, and the groove depth of the movable guide groove 12 decreases from bottom to top; in this embodiment, the peripheral side surface of the mold core 10 is concavely provided with a fixing groove 13 that cooperates with an external fixing mechanism to fix, and the four fixing grooves 13 are respectively located on the side edges of the peripheral side surface of the mold core 10; in addition, the movable guide grooves 12 are three arranged in a front-to-back interval.

[0028] The movable member 20 can be movably arranged in the movable cavity 11 up and down, and a through hole 21 is opened in the movable member 20. The inner end of the through hole 21 is connected to the movable guide groove 12, and an elastic member 40 is arranged in the through hole 21; in the present embodiment, the through holes 21 are also three arranged in a front-to-back interval, and the inner end of each through hole 21 is connected to the corresponding movable guide groove 11; and the elastic member 40 is a spring.

[0029] The ejector pin 30 can be movably disposed in the through hole 21 and elastically abuts against the elastic member 40. The contact end 31 of the ejector pin 30 extends out of the inner end of the through hole 21 and contacts the inner wall surface of the movable guide groove 12. When the movable member 20 moves downward to the right position, the end surface of the ejector end 32 of the ejector pin 30 is flush with the outer side surface of the movable member 20. When the movable member 20 moves upward to the right position, the ejector end 32 of the ejector pin 30 extends out of the outer end of the through hole 21 and ejects the product 50. In this embodiment, there are three ejector pins 30. The contact end 31 of the ejector pin 30 is convexly provided with a limiting portion 33. The radius of the limiting portion 33 is greater than the inner end radius of the through hole 21, and the radius of the limiting portion 33 is greater than the outer end radius of the through hole 21.

[0030] The design focus of the utility model is that the movable part can be movably arranged in the movable cavity up and down, so that the silicone product is not easy to adhere to the movable part, and the groove depth of the movable guide groove is shortened from bottom to top, and the contact end of the ejector pin extends out of the inner end of the through hole and contacts the inner wall surface of the movable guide groove. When the movable part moves upward to the right position, the groove depth that is shortened from bottom to top prompts the ejection end of the ejector pin to extend out of the outer end of the through hole and eject the product, thereby reducing the demoulding difficulty of the silicone product and preventing deformation during demoulding.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mold ejection mechanism, characterized in that: The invention comprises a mold core, a movable part and an ejector pin; the mold core is provided with an movable cavity, the inner wall of the movable cavity is provided with a movable guide groove, the groove depth of the movable guide groove is shortened from bottom to top; the movable part can be movably arranged in the movable cavity, the movable part is provided with a through hole, the inner end of the through hole is connected with the movable guide groove, and an elastic part is arranged in the through hole; the ejector pin can be movably arranged in the through hole and elastically contact with the elastic part, the contact end of the ejector pin extends out of the inner end of the through hole and contacts with the inner wall surface of the movable guide groove, when the movable part moves downward to the position, the end face of the ejector end of the ejector pin is flush with the outer side surface of the movable part, and when the movable part moves upward to the position, the ejector end of the ejector pin extends out of the outer end of the through hole and ejects the product.

2. The mold ejection mechanism according to claim 1, characterized in that: The elastic member is a spring.

3. The ejection mechanism for a mold according to claim 1, characterized in that: The movable guide grooves are three and arranged at intervals in the front and back. Correspondingly, the through holes are also three and arranged at intervals in the front and back. The inner end of each through hole is connected to the corresponding movable guide groove. There are also three ejector pins.

4. The ejection mechanism for a mold according to claim 1, characterized in that: A limiting portion is convexly provided at the contact end of the ejector pin, the radius of which is greater than the inner radius of the through hole, and the radius of which is greater than the outer radius of the through hole.

5. The mold ejection mechanism according to claim 1, characterized in that: A fixing groove which cooperates with an external fixing mechanism for fixing is concavely provided on the peripheral side surface of the mold core.

6. The ejection mechanism for a mold according to claim 5, characterized in that: There are four fixing grooves, which are respectively located at the peripheral edges of the side surfaces of the mold core.

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