Injection mold easy to demold

Abstract

The utility model discloses an injection mold easy to demold. The injection mold easy to demold comprises a lower mold, a mold core and an upper mold, the lower die comprises a base, an anti-loosening block, a first ejector plate and a second ejector plate, and a movable cavity is formed in the base; the anti-loosening block is arranged on the base through a shutter; the mold core is arranged on the base and located above the movable cavity, the mold core is provided with a forming cavity, and the bottom of the forming cavity is provided with an ejection hole for the ejector pin to stretch in; and the upper mold can move up and down and is arranged above the mold core in a manner of opening or closing the forming cavity. The interference groove is formed in the second ejector plate, and the anti-loosening block of the anti-loosening part is matched with the interference groove, so that the second ejector plate is not easy to loosen, and the ejection action of the second ejector plate is more accurate; when the second ejector pin moves up and down, the anti-loosening block is easily influenced by friction force to move up and down, the anti-loosening block is arranged on the base through the opening and closing device, and the design of the opening and closing device can effectively resist the up-and-down movement force of the anti-loosening block.

Description

Technical Field

[0001] The utility model relates to the technology of mold field, in particular to an injection mold which is easy to demould. 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] In order to facilitate the demolding of the finished product after injection molding, most of them will be ejected by setting an ejector mechanism in the mold with an ejector pin. Some finished products with more complex structures require two ejector mechanisms to perform ejection actions in sequence to make the finished product demolded smoothly. However, the structure of the mold is relatively compact, so the ejector mechanism that performs the ejection action first affects the ejection mechanism that performs the ejection action later, causing the ejection mechanism that performs the ejection action later to become loose, so that the subsequent ejection action is not accurate enough, and the finished product cannot be demolded smoothly. Therefore, it is necessary to propose a new solution to solve the above problems. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art, and its main purpose is to provide an injection mold that is easy to demould, which has the characteristics of simple structure, easy use, safety and reliability.

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

[0006] An easy-to-demold injection mold comprises a lower mold, a mold core and an upper mold;

[0007] The lower mold includes a base, an anti-loosening block, a first ejector plate and a second ejector plate, the base is provided with a movable cavity; the anti-loosening block is arranged on the base through an opener and a closeer, and the anti-loosening block has an anti-loosening portion; the first ejector plate and the second ejector plate can be movably arranged in the movable cavity up and down, the first ejector plate is provided with a first ejector, the second ejector plate is provided with a second ejector, the second ejector plate is arranged above the first ejector plate, and the second ejector plate is provided with an interference groove, the aforementioned anti-loosening portion cooperates with the interference groove, and the peripheral side surface of the anti-loosening portion is in close contact with the inner wall surface of the interference groove;

[0008] The mold core is arranged on the base and located above the active cavity. The mold core is provided with a molding cavity. The bottom of the molding cavity is provided with an ejection hole for the first ejector pin or the second ejector pin to extend into.

[0009] The upper mold can move up and down and can open or close the molding cavity and is arranged above the mold core. The upper mold is provided with a scraper, and the scraper has a reset block. When the upper mold closes the molding cavity, the reset block abuts against the upper end of the anti-loosening block and prompts the anti-loosening block to reset.

[0010] As a preferred solution, the base is provided with a fixing block, and the anti-loosening block is fixed on the base through a shutter in cooperation with the fixing block.

[0011] As a preferred solution, the switch is a nylon switch.

[0012] As a preferred solution, a limit block is provided on one side of the mold core. When the upper mold closes the molding cavity, the shovel machine abuts against the upper limit of the limit block, and the reset block abuts against the upper end of the anti-loosening block and prompts the anti-loosening block to reset.

[0013] As a preferred solution, the anti-loosening portion is T-shaped, and correspondingly, the interference groove is also T-shaped. This design can increase the contact area between the anti-loosening portion and the interference groove, and increase the interference force between the two.

[0014] 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:

[0015] By providing an interference groove in the second ejector plate, the anti-loosening block of the anti-loosening part cooperates with the interference groove, so that the second ejector plate is not easy to loosen, the ejection action of the second ejector plate is more accurate, and the finished product is easier to demold; when the second ejector moves up and down, the anti-loosening block is easily affected by the friction force and moves up and down, and the anti-loosening block is set on the base through an opener and shutter. The design of the opener and shutter can effectively offset the force of the anti-loosening block moving up and down.

[0016] 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

[0017] Figure 1 It is a schematic diagram of an assembly perspective view of a preferred embodiment of the utility model;

[0018] Figure 2 It is an exploded view of a preferred embodiment of the utility model;

[0019] Figure 3 It is a cross-sectional view of a preferred embodiment of the utility model.

[0020] Description of the accompanying drawings:

[0021] 10. Lower mold 11. Base

[0022] 111, movable cavity 12, anti-loosening block

[0023] 121, anti-loosening part 13, first ejector plate

[0024] 14. Second ejector plate 141. Interference groove

[0025] 15. Opener 16. Fixing block

[0026] 20. Mold core 21. Molding cavity

[0027] 22. Ejection hole 23. Limit block

[0028] 30. Upper die 31. Shovel machine

[0029] 311. Reset block. DETAILED DESCRIPTION

[0030] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a lower mold 10, a mold core 20 and an upper mold 30.

[0031] The lower mold 10 includes a base 11, an anti-loosening block 12, a first ejector plate 13 and a second ejector plate 14. The base 11 is provided with a movable cavity 111; the anti-loosening block 12 is arranged on the base 11 through an opener 15, and the anti-loosening block 12 has an anti-loosening portion 121; the first ejector plate 13 and the second ejector plate 14 can be movably arranged in the movable cavity 111 up and down, the first ejector plate 13 is provided with a first ejector (not shown in the figure), the second ejector plate 14 is provided with a second ejector (not shown in the figure), and the second ejector plate 14 is arranged above the first ejector plate 13, and The second ejector plate 14 is provided with an interference groove 141, and the aforementioned anti-loosening portion 121 cooperates with the interference groove 141, and the peripheral side surface of the anti-loosening portion 121 is in close contact with the inner wall surface of the interference groove 141; in this embodiment, the base 11 is provided with a fixing block 16, and the anti-loosening block 12 is fixed to the base through an opener and shutter 15 and the fixing block 16; and the opener and shutter 15 is a nylon opener and shutter; in addition, the anti-loosening portion 121 is T-shaped, and correspondingly, the interference groove 141 is also T-shaped. This design can increase the contact area between the anti-loosening portion 121 and the interference groove 141, and increase the interference force between the two.

[0032] The mold core 20 is disposed on the base 11 and is located above the active cavity 111. The mold core 20 is provided with a molding cavity 21. The bottom of the molding cavity 21 is provided with an ejection hole 22 for the first ejector pin or the second ejector pin to extend into. In this embodiment, a limiting block 23 is provided on one side of the mold core 20.

[0033] The upper mold 30 can move up and down and can open or close the molding cavity 21 and is arranged above the mold core 20. The upper mold 30 is provided with a shovel 31, and the shovel 31 has a reset block 311. When the upper mold closes the molding cavity 21, the reset block 311 abuts against the upper end of the anti-loosening block 12 and prompts the anti-loosening block 12 to reset; specifically, when the upper mold 30 closes the molding cavity 21, the shovel 31 abuts against the upper limit of the limit block 23, and the reset block 311 abuts against the upper end of the anti-loosening block 12 and prompts the anti-loosening block 12 to reset.

[0034] The design focus of the utility model is that: by providing an interference groove in the second ejector plate, the anti-loosening block of the anti-loosening part cooperates with the interference groove, so that the second ejector plate is not easy to loosen, and the ejection action of the second ejector plate is more accurate; and when the second ejector moves up and down, the anti-loosening block is easily affected by the friction force and moves up and down, and the anti-loosening block is arranged on the base through an opener and shutter, and the design of the opener and shutter can effectively offset the force of the anti-loosening block moving up and down; it should be noted that if the anti-loosening block is fixed on the base, the anti-loosening block will not move up and down, but it will bring great inconvenience to the subsequent maintenance and disassembly of the first ejector plate and the second ejector plate, so the anti-loosening block adopts a detachable design.

[0035] 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. An easy-to-release injection mold, characterized in that: It includes a lower mold, a mold core and an upper mold; The lower mold includes a base, an anti-loosening block, a first ejector plate and a second ejector plate, the base is provided with a movable cavity; the anti-loosening block is arranged on the base through an opener and a closeer, and the anti-loosening block has an anti-loosening portion; the first ejector plate and the second ejector plate can be movably arranged in the movable cavity up and down, the first ejector plate is provided with a first ejector, the second ejector plate is provided with a second ejector, the second ejector plate is arranged above the first ejector plate, and the second ejector plate is provided with an interference groove, the aforementioned anti-loosening portion cooperates with the interference groove, and the peripheral side surface of the anti-loosening portion is in close contact with the inner wall surface of the interference groove; The mold core is arranged on the base and located above the active cavity. The mold core is provided with a molding cavity. The bottom of the molding cavity is provided with an ejection hole for the first ejector pin or the second ejector pin to extend into. The upper mold can move up and down and can open or close the molding cavity and is arranged above the mold core. The upper mold is provided with a scraper, and the scraper has a reset block. When the upper mold closes the molding cavity, the reset block abuts against the upper end of the anti-loosening block and prompts the anti-loosening block to reset.

2. The easy-to-release injection mold according to claim 1, characterized in that: The base is provided with a fixing block, and the anti-loosening block is fixed on the base through the cooperation of the switch and the fixing block.

3. The easy-to-release injection mold according to claim 1, characterized in that: The switch is a nylon switch.

4. The easy-to-release injection mold according to claim 1, characterized in that: A limit block is arranged on one side of the mold core. When the upper mold closes the molding cavity, the shovel machine abuts against the upper limit of the limit block, and the reset block abuts against the upper end of the anti-loosening block and prompts the anti-loosening block to reset.

5. The easy-to-release injection mold according to claim 1, characterized in that: The anti-loosening portion is T-shaped, and correspondingly, the interference groove is also T-shaped.

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