An injection mold that facilitates demolding

Abstract

This utility model relates to the field of plastic injection molds and discloses an injection mold that facilitates demolding. It includes a support column, a worktable fixedly connected to the top of the support column, a lower mold fixedly connected to the top of the worktable, an air outlet inside the lower mold, and an air inlet chamber inside the lower mold. An air valve assembly is provided inside the air inlet chamber. The air valve assembly includes a pneumatic block slidably connected inside the air inlet chamber. A second ejector rod is fixedly connected to the top of the pneumatic block, and an air valve nozzle is fixedly connected to the top of the second ejector rod. A spring is sleeved on the outer wall of the second ejector rod. In this utility model, when gas enters the air inlet chamber through the air inlet channel, it pushes the pneumatic block upwards, thereby pushing up the air valve nozzle. Gas can then be blown out from the gap between the air valve nozzle and the air inlet chamber, achieving the function of assisting mold demolding. This solves the problem of damage to the demolded object during demolding in traditional injection molds and improves the quality of mold demolding.

Description

Technical Field

[0001] This utility model relates to the field of plastic injection molds, and in particular to an injection mold that is easy to demold. Background Technology

[0002] In the injection molding industry, mold demolding is a critical step affecting product quality and production efficiency. Traditional injection molds often experience demolding difficulties due to the adhesion between the product and the mold wall or vacuum suction, which can even cause surface scratches, deformation, and other defects. Therefore, achieving efficient and non-destructive demolding has become one of the most pressing issues for the industry.

[0003] In existing technologies, injection molds typically employ mechanical ejection mechanisms such as ejector pins and push plates to assist in demolding. The technical principle is to use hydraulic or mechanical means to drive the ejector pins or push plates, pushing the molded part out of the mold cavity. In addition, some molds also spray a release agent onto the cavity surface to reduce the adhesion between the part and the mold. However, these methods rely on mechanical contact demolding, which can easily damage the surface of the part during the demolding process, especially for parts with complex structures or soft materials.

[0004] However, existing technologies suffer from the problem of easily damaging the product during demolding. Mechanical ejection mechanisms, when pushing the product out of the mold, may cause deformation or surface scratches due to uneven force or excessive contact pressure. Furthermore, the frequent use of mold release agents not only increases production costs but may also affect the surface quality or subsequent processing performance of the product. Therefore, there is an urgent need for a non-contact, efficient, and non-destructive demolding technology to improve the demolding quality and production efficiency of injection molds. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an injection mold that facilitates demolding, aiming to improve the problem that traditional injection molds use a single demolding platen to lift and demold during demolding, which leads to easy damage to the molded product during demolding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection mold that is easy to demold, comprising a support column, a worktable fixedly connected to the top of the support column, a lower mold fixedly connected to the top of the worktable, an air outlet opened at the bottom of the lower mold, an air inlet chamber opened inside the lower mold, and a valve assembly provided inside the air inlet chamber.

[0007] The valve assembly includes a pneumatic block, which is slidably connected to the inside of the intake chamber. A second push rod is fixedly connected to the top of the pneumatic block, and a valve nozzle is fixedly connected to the top of the second push rod. A spring is sleeved on the outer wall of the second push rod, the top of the spring is fixedly connected to the inside of the lower mold, and the bottom of the spring is fixedly connected to the top of the pneumatic block.

[0008] As a further description of the above technical solution:

[0009] The lower mold has a demolding groove at the bottom, an air inlet at the bottom, a positioning hole at the top, and multiple air inlets fixedly connected to the outer wall of the lower mold.

[0010] As a further description of the above technical solution:

[0011] A bracket is fixedly connected to the top of the workbench, and a top cover is fixedly connected to the top of the bracket.

[0012] As a further description of the above technical solution:

[0013] A capacitor push rod is fixedly connected to the top of the top cover, and the output end of the capacitor push rod is fixedly connected to the upper mold.

[0014] As a further description of the above technical solution:

[0015] A mold assembly template is fixedly connected to the outer wall of the upper mold, a sealing strip is fixedly connected to the bottom of the mold assembly template, and a positioning pile is fixedly connected to the bottom of the mold assembly template.

[0016] As a further description of the above technical solution:

[0017] A crossbeam is fixedly connected to the top of the workbench, and an electric push rod is fixedly connected to the outer wall of each crossbeam. The output end of the electric push rod is fixedly connected to a top plate.

[0018] As a further description of the above technical solution:

[0019] A rubber sheet is fixedly connected to one side of the top plate.

[0020] As a further description of the above technical solution:

[0021] A capacitor push rod 2 is fixedly connected to the bottom of the workbench. A push rod 1 is fixedly connected to the output end of the capacitor push rod 2. A demolding template is fixedly connected to the top of the push rod 1. The demolding template is slidably connected inside the demolding groove.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the lower mold is first fixed on the top of the workbench. An air outlet is opened inside the lower mold, and an air inlet chamber and an air inlet channel are also opened inside the lower mold. A pneumatic block and an air valve are set inside the air inlet chamber. The pneumatic block and the air valve are fixedly connected by a push rod. A spring is sleeved on the outer wall of the push rod. When gas enters the air inlet chamber through the air inlet channel, it will push the pneumatic block to move upward, thereby pushing up the air valve. As a result, the gas can be blown out from the gap between the air valve and the air inlet chamber, which achieves the function of assisting the mold demolding. This solves the problem that traditional injection molds are prone to damaging the demolded object during demolding and improves the demolding quality of injection molds.

[0024] 2. In this utility model, a closing template is fixedly connected to the outer wall of the upper mold, and a positioning pin and a sealing strip are fixedly connected to the bottom of the closing template. At the same time, a positioning hole is opened on the top of the lower mold to match the positioning pin at the bottom of the closing template. When the lower mold and the upper mold are closed, the positioning pin and the positioning hole are engaged, achieving the ability of precise mold closing. This solves the problem of unstable product quality caused by inaccurate mold closing in traditional injection molds, and improves the stability and accuracy of mold closing in injection molds. Attached Figure Description

[0025] Figure 1 This is a perspective view of an injection mold that facilitates demolding, as proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the lower mold structure of an injection mold that facilitates demolding, as proposed in this utility model.

[0027] Figure 3 This is a schematic cross-sectional view of the lower mold of an injection mold that facilitates demolding, as proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the valve structure of an injection mold that facilitates demolding, as proposed in this utility model.

[0029] Figure 5 This is a frontal view of an injection mold that facilitates demolding, as proposed in this utility model.

[0030] Figure 6 This is a schematic diagram of the upper mold structure of an injection mold that facilitates demolding, as proposed in this utility model.

[0031] Legend:

[0032] 1. Support column; 2. Workbench; 3. Bracket; 4. Top cover; 5. Capacitor push rod one; 6. Lower mold; 7. Air outlet; 8. Demolding groove; 9. Positioning hole; 10. Air inlet; 11. Air inlet channel; 12. Push rod one; 13. Demolding plate; 14. Valve nozzle; 15. Push rod two; 16. Spring; 17. Pneumatic block; 18. Air inlet chamber; 19. Upper mold; 20. Electric push rod; 21. Top plate; 22. Rubber plate; 23. Capacitor push rod two; 24. Closing plate; 25. Positioning post; 26. Sealing strip; 27. Crossbeam. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 This utility model provides an embodiment of an injection mold for easy demolding, comprising a support column 1, a worktable 2 fixedly connected to the top of the support column 1, the support column 1 supporting the worktable 2, a lower mold 6 fixedly connected to the top of the worktable 2, an air outlet 7 at the bottom of the lower mold 6 for blowing out demolding gas, an air inlet chamber 18 inside the lower mold 6 for storing gas, and a valve assembly inside the air inlet chamber 18.

[0035] The valve assembly includes a pneumatic block 17, which is slidably connected inside the intake chamber 18. A push rod 15 is fixedly connected to the top of the pneumatic block 17. The pneumatic block 17 is used to withstand gas pressure to lift the push rod 15. A valve stem 14 is fixedly connected to the top of the push rod 15. The valve stem 14 is used to release gas. A spring 16 is sleeved on the outer wall of the push rod 15. The spring 16 is used to reset the valve stem 14.

[0036] Reference Figure 4 and Figure 5The lower mold 6 has a demolding groove 8 at its bottom. The demolding groove 8 is used for demolding. The lower mold 6 has an air inlet 11 at its bottom, through which gas enters the mold. The lower mold 6 has a positioning hole 9 at its top, used for positioning. Multiple air inlets 10 are fixedly connected to the outer wall of the lower mold 6, used for air intake. A bracket 3 is fixedly connected to the top of the worktable 2. A top cover 4 is fixedly connected to the top of the bracket 3, supporting the top cover 4. A capacitor push rod 5 is fixedly connected to the top of the top cover 4. The output end of the capacitor push rod 5 is fixedly connected to the upper mold 19, used to push the upper mold 19. A closing mold plate 24 is fixedly connected to the outer wall of the upper mold 19, used for mold closing. A sealing strip 26 is fixedly connected to the bottom of the closing mold plate 24, used to seal the mold closing environment. A positioning stake 25 is fixedly connected for positioning. A crossbeam 27 is fixedly connected to the top of the workbench 2. An electric push rod 20 is fixedly connected to the outer wall of each crossbeam 27 for fixing the electric push rod 20. A top plate 21 is fixedly connected to the output end of the electric push rod 20 for pushing the top plate 21. A rubber plate 22 is fixedly connected to one side of the top plate 21 for shock absorption and protection of the lower mold 6. A capacitor push rod 23 is fixedly connected to the bottom of the workbench 2. A push rod 12 is fixedly connected to the output end of the capacitor push rod 23 for pushing the push rod 12. A demolding template 13 is fixedly connected to the top of the push rod 12 for pushing the demolding template 13. The demolding template 13 is slidably connected inside the demolding groove 8.

[0037] Working principle: 1. Supporting workbench 2. 3. Supporting top cover 4. The lower mold 6 at the top of the workbench 2 has an air outlet 7, an air inlet chamber 18 and an air inlet channel 11. The outer wall of the workbench 2 is fixed with an air inlet 10. Gas enters from the air inlet 10, enters the air inlet chamber 18 through the air inlet channel 11, pushes the pneumatic block 17 up, and then raises the valve 14 connected to the pneumatic block 17 through the push rod 2 15. The gas is blown out through the gap between the valve 14 and the air inlet chamber 18 to assist the demolding plate 13 inside the lower mold 6 in demolding the molded object.

[0038] The top of the lower mold 6, which is fixed to the top of the workbench 2, has a positioning hole 9. At the same time, the upper mold 19, which is set at the bottom of the top cover 4, has a closing template 24 fixed to its outer wall. The bottom of the closing template 24 is fixed with a positioning pin 25 and a spring 16. The upper mold 19, which is fixed to the output end of the capacitor push rod 5, is pushed down by the capacitor push rod 5 to close with the lower mold 6. At this time, the positioning pin 25 is engaged with the positioning hole 9, and the sealing strip 26 seals the mold closing environment, improving the accuracy of mold closing. At the same time, the workbench 2, which is fixed to one side of the crossbeam 27 on both sides of the lower mold 6, is activated to clamp and stabilize the lower mold 6, improving the stability during injection molding.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An injection mold for easy demolding, comprising a support column (1), characterized in that: The top of the support column (1) is fixedly connected to a workbench (2), the top of the workbench (2) is fixedly connected to a lower mold (6), the bottom of the lower mold (6) is provided with an air outlet (7), the interior of the lower mold (6) is provided with an air inlet chamber (18), and the air inlet chamber (18) is provided with a valve assembly. The valve assembly includes a pneumatic block (17), which is slidably connected inside the intake chamber (18). A push rod (15) is fixedly connected to the top of the pneumatic block (17), and a valve nozzle (14) is fixedly connected to the top of the push rod (15). A spring (16) is sleeved on the outer wall of the push rod (15). The top of the spring (16) is fixedly connected inside the lower mold (6), and the bottom of the spring (16) is fixedly connected to the top of the pneumatic block (17).

2. The injection mold for easy demolding according to claim 1, characterized in that: The lower mold (6) has a demolding groove (8) at the bottom, an air inlet (11) at the bottom, a positioning hole (9) at the top, and multiple air inlets (10) fixedly connected to the outer wall of the lower mold (6).

3. The injection mold for easy demolding according to claim 1, characterized in that: The workbench (2) is fixedly connected to a bracket (3) on top, and a top cover (4) is fixedly connected to the top of the bracket (3).

4. The injection mold for easy demolding according to claim 3, characterized in that: The top cover (4) is fixedly connected to a capacitor push rod (5), and the output end of the capacitor push rod (5) is fixedly connected to an upper mold (19).

5. The injection mold for easy demolding according to claim 4, characterized in that: The upper mold (19) is fixedly connected to the outer wall of the mold assembly template (24), the bottom of the mold assembly template (24) is fixedly connected to the sealing strip (26), and the bottom of the mold assembly template (24) is fixedly connected to the positioning pile (25).

6. The injection mold for easy demolding according to claim 3, characterized in that: The workbench (2) has multiple crossbeams (27) fixedly connected to its outer wall. Each crossbeam (27) has an electric push rod (20) fixedly connected to one side. The output end of the electric push rod (20) is fixedly connected to a top plate (21).

7. The injection mold for easy demolding according to claim 6, characterized in that: A rubber plate (22) is fixedly connected to one side of the top plate (21).

8. The injection mold for easy demolding according to claim 1, characterized in that: The bottom of the workbench (2) is fixedly connected to a capacitor push rod two (23), the output end of the capacitor push rod two (23) is fixedly connected to a push rod one (12), the top of the push rod one (12) is fixedly connected to a demolding template (13), and the demolding template (13) is slidably connected inside the demolding groove (8).

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