Injection mold for internal spiral injection molding part

Abstract

The utility model discloses an injection mold for an internal spiral injection molding part, and relates to the technical field of injection molding of spiral injection molding parts. The injection mold for the internal spiral injection molding part comprises a lower mold set, an upper mold set is detachably connected to the lower mold set, and a cavity is formed between the upper mold set and the lower mold set; the upper die set is further connected with a material injection piece used for injecting molten plastic raw materials into the cavity, and the lower die set is further connected with a material ejection assembly used for ejecting out products. According to the invention, the product is convenient to disassemble.

Description

Technical Field

[0001] The present application relates to the field of injection molding of internal spiral injection molded parts, and in particular to an injection mold for internal spiral injection molded parts. Background Art

[0002] Injection molding is a mature plastic processing technology. It injects molten plastic raw materials into a mold through high temperature, and then forms a product after cooling and solidification. Currently, injection molding is widely used in the production of various plastic products. Through precise control of factors such as materials, temperature, pressure, and time, injection molding technology can produce plastic products with complex shapes and precise dimensions.

[0003] Among them, plastic products with complex shapes include internal spiral products. Internal spiral products mainly refer to products with an internal spiral structure. Such products not only have irregular shapes but also usually have relatively long overall external dimensions. Internal spiral products are widely used and cover multiple industries and fields. The applications of internal spiral products include, but are not limited to, pipes, oil presses, and bearings, etc.

[0004] Currently, existing internal spiral injection molds include an upper mold module and a lower mold module. The upper and lower mold modules can form a mold cavity after being closed. By injecting high-temperature molten plastic raw materials into the mold cavity and then cooling, an internal spiral injection molded part can be obtained. After that, the worker can demold the upper mold module to move the internal spiral injection molded part out upwards.

[0005] Due to the long and complex shape of the product, it is not convenient for workers to manually disassemble and remove the manufactured internal spiral injection molded part from the lower mold module, and the movement process may be unstable, which may cause damage to the product structure. Summary of the Utility Model

[0006] In order to facilitate the disassembly of the product, the present application provides an injection mold for internal spiral injection molded parts.

[0007] The injection mold for internal spiral injection molded parts provided by the present application adopts the following technical solutions:

[0008] An injection mold for internal spiral injection molded parts includes a lower mold module. An upper mold module is detachably connected to the lower mold module, and a cavity is formed between the upper mold module and the lower mold module. The upper mold module is also connected with a feeding member for injecting molten plastic raw materials into the cavity, and the lower mold module is also connected with a ejector assembly for ejecting the product.

[0009] By adopting the above technical solutions, after injecting molten plastic raw materials into the cavity by using the feeding member and cooling, an internal spiral injection molded part can be obtained. After that, after disassembling the upper mold module, the internal spiral injection molded part can be easily ejected and disassembled by using the ejector assembly.

[0010] In a specific feasible implementation, the ejector assembly includes a driving member disposed on the lower mold base, and an ejector member is provided on the driving member; the lower mold base is further provided with an ejector hole communicating with the cavity, and the ejector member is inserted into the ejector hole. During injection molding, the top end of the ejector member is flush with the bottom end of the cavity.

[0011] By adopting the above technical solution, after the inner spiral injection molded part is formed, driving the driving member can drive the ejector member to move and lift the inner spiral injection molded part.

[0012] In a specific feasible implementation, the ejector member includes a mounting plate connected to the driving member, and a plurality of ejector pins are connected to the mounting plate. The plurality of ejector pins are equidistantly distributed along a straight line.

[0013] By adopting the above technical solution, the plurality of ejector pins can stably lift the inner spiral injection molded part.

[0014] In a specific feasible implementation, the lower mold base includes a lower template connected to the upper mold base. A groove is formed on the lower template, and a lower mold connected to the lower template is provided in the groove. The ejector hole is formed in the lower mold; a step portion for restricting the movement of the ejector pin is provided on the side wall of the ejector pin, and the step portion can move and abut against the bottom end of the lower mold.

[0015] By adopting the above technical solution, driving the driving member will drive the ejector pin to move until the step portion abuts against the bottom end of the lower mold. At this time, the ejector pin cannot move further. This design is used to prevent the ejector pin from moving too far and dropping the inner spiral injection molded part.

[0016] In a specific feasible implementation, the lower template is provided with a first docking hole, and the lower mold is provided with a second docking hole. The first docking hole and the second docking hole are commonly connected by a screw.

[0017] By adopting the above technical solution, the lower mold can be disassembled for cleaning.

[0018] In a specific feasible implementation, the lower mold base is provided with a first connection hole, and the upper mold base is provided with a second connection hole corresponding to the first connection hole. The first connection hole and the second connection hole are commonly connected by a screw.

[0019] By adopting the above technical solution, it is convenient to disassemble the upper mold base.

[0020] In a specific feasible implementation, there are a plurality of cavities, and the plurality of cavities are horizontally and vertically distributed.

[0021] By adopting the above technical solution, multiple inner spiral injection molded parts can be manufactured in one molding.

[0022] In a specific feasible embodiment, a receiving groove is formed at the upper end of the lower module, and a convex block is provided at the lower end of the upper module, and the convex block is embedded in the receiving groove.

[0023] By adopting the above technical solution, it is convenient to close the upper module and the lower module.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. After injecting the molten plastic raw material into the cavity by using the injection member and cooling, the internal spiral injection molded part can be obtained. After removing the upper module, the internal spiral injection molded part can be easily ejected and disassembled by using the ejector assembly;

[0026] 2. The driving member drives the ejector pin to move until the stepped portion abuts against the bottom end of the lower mold. At this time, the ejector pin cannot move further. This design is used to prevent the ejector pin from moving too far and ejecting the internal spiral injection molded part;

[0027] 3. In the present application, it is convenient to disassemble the lower mold for cleaning. Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of an internal spiral injection molded part injection mold according to an embodiment of the present application.

[0029] Figure 2 is a top view for showing the lower module.

[0030] Figure 3 is an exploded view for showing an internal spiral injection molded part injection mold.

[0031] Figure 4 is a cross-sectional view for showing an internal spiral injection molded part injection mold.

[0032] Figure 5 is Figure 4 an enlarged view of part A in

[0033] Description of the reference numerals: 1. Lower module; 11. Lower template; 12. Groove; 13. Lower mold; 2. Upper module; 21. Upper template; 22. Installation groove; 23. Upper mold; 3. Cavity; 4. Runner; 5. Injection member; 6. Ejector assembly; 61. Driving member; 62. Ejector; 621. Installation plate; 622. Ejector pin; 623. Stepped portion; 63. Ejector hole; 7. Docking hole one; 71. Docking hole two; 8. Connection hole one; 81. Connection hole two; 9. Receiving groove; 91. Convex block. Detailed Description of the Embodiment

[0034] The present application will be further described in detail below with reference to the drawings.

[0035] An embodiment of the present application discloses an injection mold for an internal spiral injection molded part, which can facilitate the stable removal of the formed internal spiral injection molded part.

[0036] Referring to Figure 1 , an injection mold for an internal spiral injection molded part includes a lower mold set 1, and an upper mold set 2 is detachably connected to the lower mold set 1. Specifically, referring to Figure 2 and Figure 3 , the lower mold set 1 includes a lower template 11, four grooves 12 are formed in the lower template 11, and a lower mold 13 connected to the lower template 11 is provided in each groove 12, and the four lower molds 13 are horizontally and vertically distributed; the upper mold set 2 includes an upper template 21 connected to the lower template 11, four installation grooves 22 are formed at the bottom end of the upper template 21 corresponding to the four lower molds 13, and an upper mold 23 connected to the upper template 21 is provided in each installation groove 22; an internal spiral-shaped cavity 3 is formed between each lower mold set 1 and the corresponding upper mold set 2. The specific structure of the cavity 3 is based on the shape of the injection molded part to be obtained by injection molding, and the structure of the cavity 3 needs to ensure that the injection molded part obtained after injection molding can move upward and out. A runner 4 communicating with the four cavities 3 is also formed between the upper template 21 and the lower template 11. Combining Figure 1 , the upper template 21 is also connected with a feeding member 5 communicating with the runner 4. The feeding member 5 is used to inject molten plastic raw material into the runner 4 so as to inject molten plastic raw material into the four cavities 3. The specific structure and injection molding method of the feeding member 5 are prior art. The lower template 11 is also connected with a ejector assembly 6 for ejecting the product.

[0037] After injecting molten plastic raw material into the cavity 3 by using the feeding member 5 and cooling, the internal spiral injection molded part can be obtained. Then, the upper template 21 is disassembled, and the internal spiral injection molded part is ejected and disassembled by using the ejector assembly 6.

[0038] Referring to Figure 4 and Figure 5 , the ejector assembly 6 includes a driving member 61. The driving member 61 is a cylinder. The driving member 61 is arranged on the lower template 11, and an ejector 62 is arranged on the driving member 61; a ejector hole 63 communicating with the cavity 3 is also formed in the lower mold set 1. The ejector 62 is inserted into the ejector hole 63. During injection molding, the top end of the ejector 62 is flush with the bottom end of the cavity 3.

[0039] Referring to Figure 4 and Figure 5 , the ejector 62 includes a mounting plate 621 connected to the driving member 61. The mounting plate 621 is arranged horizontally, and a plurality of ejector pins 622 are connected to the mounting plate 621. The plurality of ejector pins 622 are equidistantly distributed along a straight line. Driving the driving member 61 can drive the mounting plate 621 to move, thereby driving the plurality of ejector pins 622 to move to lift the internal spiral injection molded part in the cavity 3.

[0040] Referring to Figure 4 andFigure 5 To prevent the ejector pin 622 from moving excessively, a step portion 623 for restricting the movement of the ejector pin 622 is provided on the side wall of the ejector pin 622. The step portion 623 can move upward and abut against the bottom end of the lower mold 13.

[0041] Refer to Figure 4 and Figure 5 To facilitate the cleaning of the lower mold 13, a first docking hole 7 is formed in the lower template 11, and a second docking hole 71 is formed in the lower mold 13. The first docking hole 7 and the second docking hole 71 are jointly connected by screws. Combining Figure 3 In addition, the upper mold 23 is also connected to the upper template 21 by screws. The specific connection structure is the same as that of the lower mold 13, so it will not be described in detail here.

[0042] Refer to Figure 3 To ensure the connection stability and detachability between the upper template 21 and the lower template 11, a plurality of first connection holes 8 are formed in the lower module 1, and corresponding second connection holes 81 are formed in the upper module 2 for each first connection hole 8. Each first connection hole 8 and the corresponding second connection hole 81 are jointly connected by screws, and the plurality of screws are distributed horizontally and vertically. To facilitate the mold closing of the upper template 21 and the lower template 11, a receiving groove 9 is formed at the upper end of the lower template 11, and a convex block 91 is provided at the lower end of the upper template 21. The convex block 91 is detachably embedded in the receiving groove 9.

[0043] The implementation principle of an inner spiral injection molded part in an embodiment of the present application is as follows: After injecting molten plastic raw materials into the cavity 3 by using the injection part 5 and cooling, an inner spiral injection molded part can be obtained. Then, the upper template 21 is disassembled, and then the driving part 61 is driven to drive the mounting plate 621 to move upward, thereby driving the plurality of ejector pins 622 to move to eject the inner spiral injection molded part in the cavity 3, which is convenient for disassembling the inner spiral injection molded part.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An injection mold for an internal spiral injection molded part, characterized in that: The invention comprises a lower mold assembly (1), an upper mold assembly (2) being detachably connected to the lower mold assembly (1), a mold cavity (3) being formed between the upper mold assembly (2) and the lower mold assembly (1); the upper mold assembly (2) is also connected to an injection piece (5) for injecting molten plastic raw material into the mold cavity (3), and the lower mold assembly (1) is also connected to an ejection assembly (6) for ejecting the product; The ejection assembly (6) comprises a driving member (61), the driving member (61) being arranged on the lower mold assembly (1), and the driving member (61) being provided with an ejection member (62); the lower mold assembly (1) is also provided with an ejection hole (63) communicating with the mold cavity (3), the ejection member (62) being inserted into the ejection hole (63), and during injection molding, the top end of the ejection member (62) is flush with the bottom end of the mold cavity (3); The ejecting member (62) comprises a mounting plate (621) connected to the driving member (61), and a plurality of ejecting needles (622) are connected to the mounting plate (621), and the plurality of ejecting needles (622) are distributed equidistantly along a straight line.

2. The internal spiral injection mold according to claim 1, characterized in that: The lower mold assembly (1) comprises a lower mold plate (11) connected to the upper mold assembly (2), the lower mold plate (11) being provided with a groove (12), a lower mold (13) connected to the lower mold plate (11) being provided in the groove (12), and the ejection hole (63) being provided in the lower mold (13); a step portion (623) for limiting the movement of the ejection needle (622) is provided on the side wall of the ejection needle (622), and the step portion (623) can move and abut against the bottom end of the lower mold (13).

3. The internal spiral injection mold according to claim 2, characterized in that: The lower template (11) is provided with a first docking hole (7), and the lower mold (13) is provided with a second docking hole (71). The first docking hole (7) and the second docking hole (71) are connected together by screws.

4. The internal spiral injection mold according to claim 1, characterized in that: The lower mold assembly (1) is provided with a connection hole 1 (8), and the upper mold assembly (2) is provided with a connection hole 2 (81) corresponding to the connection hole 1 (8), and the connection hole 1 (8) and the connection hole 2 (81) are connected together by a screw.

5. The internal spiral injection mold according to claim 1, characterized in that: The mold cavities (3) are provided in plurality, and the plurality of mold cavities (3) are distributed horizontally and vertically.

6. The internal spiral injection mold according to claim 1, characterized in that: The upper end of the lower die set (1) is provided with a receiving groove (9), and the lower end of the upper die set (2) is provided with a protrusion (91), and the protrusion (91) is embedded in the receiving groove (9).

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