Thermoplastic molding die with automatic ejection

Abstract

The utility model discloses a kind of automatic ejection thermoplastic forming mould, belong to thermoplastic mould technical field, including injection molding assembly, the injection molding assembly includes bottom plate, the top of bottom plate is fixedly connected with stand, and the top of stand is fixedly connected with top plate;Lower die assembly, the lower die assembly is correspondingly below adjusting plate, and lower die assembly includes lower die body, the lower die body injection molding cavity cavity center is slidably provided with ejector plate.Through the setting of ejector assembly, through the adjustable structure setting of lower pressure lever, so that its lower pressure stroke can be adapted to the thickness of upper die and be adjusted, and then improve its lower pressure drive accuracy, so that the lower pressure of lower pressure lever to support plate, cooperate bottom spring, in the upper die stripping process, through the rebound of support plate drives ejector plate to move up, realize the automatic ejection of forming mould, and the overall structure of this ejector assembly is simple, improve its fault tolerance while reducing production cost.

Description

Technical Field

[0001] This utility model relates to the field of thermoplastic mold technology, specifically an automatic ejection thermoplastic molding mold. Background Technology

[0002] Thermoplastic molds are molds used to process thermoplastic materials. They are a common type of plastic processing mold. They soften the material by heating it and then solidify it after cooling. They can be repeatedly heated, plasticized, and reshaped.

[0003] An investigation revealed that a utility model patent (publication number: CN218111700U) discloses an automatically ejecting thermoplastic molding die. The die includes a fixed mold mounted on a processing platform using screws, with a downwardly recessed molding chamber on its upper surface. A matching movable mold is positioned above the fixed mold at a corresponding location. An ejector plate is movably mounted at the bottom of the molding chamber of the fixed mold. A longitudinal threaded rod is rotatably mounted at the middle of the lower surface of the ejector plate. A movable rod is longitudinally installed through both ends of the movable mold. This automatically ejecting thermoplastic molding die employs a novel structural design, allowing the product to be automatically ejected after mold separation via the ejector plate inside the molding chamber. This prevents sticking and ensures efficient demolding. Furthermore, the external frame of the device compresses the movable rod, causing the internal sealed piston to expel air, effectively cleaning the molding chamber and preventing debris residue from affecting its use.

[0004] The aforementioned patent achieves automatic ejection and demolding of plastic molding by raising the lifting plate to eject the product. However, its transmission structure is driven by several transmission structures such as gears and synchronous belts, which makes the transmission process cumbersome, increases the cost of use, and is prone to transmission failure. This can lead to the molding mold failing to eject smoothly. In addition, the pressing depth of its automatic ejection structure is not adjustable, so when pressing down on upper molds of different thicknesses, it is impossible to adjust the pressing stroke, which can easily cause over-transmission of the ejection plate and thus cause the transmission mechanism to malfunction.

[0005] Therefore, this utility model provides an automatically ejecting thermoplastic molding die to solve the above problems. Utility Model Content

[0006] This invention provides an automatically ejecting thermoplastic molding die, which aims to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic ejection thermoplastic molding die, comprising an injection molding assembly, the injection molding assembly comprising a base plate, a column fixedly connected to the top of the base plate, and a top plate fixedly connected to the top of the column, a cylinder fixedly connected to the upper surface of the top plate, and an adjusting plate fixedly connected to the lifting end of the cylinder extending through to the bottom of the top plate.

[0008] The lower mold assembly is located below the adjusting plate and includes a lower mold body. An ejector plate is slidably provided in the center of the injection cavity of the lower mold body.

[0009] An ejection assembly includes a support plate and a pressing rod. The support plate is fixedly connected to the bottom of the ejection plate, and the pressing rod is fixedly connected to an adjustment plate. The ejection assembly is used for automatic ejection control of the ejection plate.

[0010] As a preferred technical solution of this application, the corner of the adjustment plate is embedded with a sliding sleeve adapted to the column, and the column is used as an auxiliary guide for the up and down sliding of the adjustment plate. The lower surface of the adjustment plate is provided with an upper mold body adapted to the injection cavity of the lower mold body.

[0011] As a preferred technical solution of this application, a cooling cavity is provided inside the lower mold body corresponding to the injection cavity, and a water-cooling pipe and thermally conductive silicone are provided inside the cooling cavity, and a cover plate is fixedly connected to the top of the cooling cavity.

[0012] As a preferred technical solution of this application, the water-cooling pipe is arranged in a spiral shape, and the water inlet and outlet of the water-cooling pipe extend to the outside of the lower mold body, and the water-cooling pipe is embedded in the interior of the thermally conductive silicone.

[0013] As a preferred technical solution of this application, the bottom of the support plate is fixedly connected to an inner cylinder, an outer cylinder is sleeved on the outside of the inner cylinder, a threaded cap is threadedly connected to the bottom of the outer cylinder, and a spring abuts between the inner cylinder and the outer cylinder.

[0014] As a preferred technical solution of this application, each of the pressing rods is externally threaded with two nuts, and the two nuts are respectively located at the upper and lower ends of the adjusting plate. The pressing rod is used to support the plate to press down.

[0015] The beneficial effects of this application are as follows:

[0016] 1. This utility model, through the setting of the ejection component and the adjustable structure of the pressure rod, allows the downward stroke to be adapted to the thickness of the upper mold, thereby improving the accuracy of its downward driving. Thus, through the downward pressure of the pressure rod on the support plate, in conjunction with the bottom spring, during the demolding process of the upper mold, the rebound of the support plate drives the ejection plate to move upward, realizing the automatic ejection of the forming mold. Moreover, the overall structure of the ejection component is simple, improving its fault tolerance while reducing production costs.

[0017] 2. This utility model improves the heat dissipation performance of the lower mold body by embedding thermally conductive silicone and water-cooling pipes, thereby enabling the lower mold body to quickly cool and mold the hot-melt plastic inside the injection cavity, thus improving the production efficiency of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the base plate, top plate, and adjustment plate of this utility model.

[0020] Figure 3 This is a partial cross-sectional view of the lower mold assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of a partial explosion structure of the ejection assembly of this utility model.

[0022] In the diagram: 1. Injection molding assembly; 11. Base plate; 12. Column; 13. Top plate; 14. Cylinder; 15. Adjusting plate; 2. Lower mold assembly; 21. Lower mold body; 22. Cooling chamber; 23. Water cooling pipe; 24. Thermally conductive silicone; 25. Ejector plate; 26. Cover plate; 3. Ejector assembly; 31. Support plate; 32. Inner cylinder; 33. Outer cylinder; 34. Threaded cap; 35. Spring; 36. Lower pressure rod; 37. Nut. Detailed Implementation

[0023] 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.

[0024] like Figure 1-4As shown, this utility model provides an automatic ejection thermoplastic molding die, including an injection molding assembly 1. The injection molding assembly 1 includes a base plate 11, a column 12 fixedly connected to the top of the base plate 11, and a top plate 13 fixedly connected to the top of the column 12. A cylinder 14 is fixedly connected to the upper surface of the top plate 13, and an adjusting plate 15 is fixedly connected to the lifting end of the cylinder 14 extending through to the lower part of the top plate 13. A lower mold assembly 2 is located below the adjusting plate 15, and the lower mold assembly 2 includes a lower mold body 2. 1. An ejector plate 25 is slidably provided in the center of the injection cavity of the lower mold body 21; the ejector assembly 3 includes a support plate 31 and a lower pressure rod 36. The support plate 31 is fixedly connected to the bottom of the ejector plate 25, and the lower pressure rod 36 is fixedly connected to the adjusting plate 15. The ejector assembly 3 is used for automatic ejection control of the ejector plate 25. By automatically rebounding the support plate 31, the upper ejector plate 25 is driven to rebound, so that the injection mold formed inside the injection cavity of the lower mold body 21 can be automatically ejected.

[0025] Furthermore, the corner of the adjusting plate 15 is embedded with a sliding sleeve that is adapted to the column 12, and the column 12 is used as an auxiliary guide for the adjusting plate 15 to slide up and down. The lower surface of the adjusting plate 15 is provided with an upper mold body that is adapted to the injection cavity of the lower mold body 21.

[0026] Furthermore, a cooling cavity 22 is provided inside the lower mold body 21 corresponding to the injection cavity. The cooling cavity 22 is equipped with a water-cooling pipe 23 and a thermally conductive silicone 24. A cover plate 26 is fixedly connected to the top of the cooling cavity 22. The water-cooling pipe 23 is arranged in a spiral shape, and the water inlet and outlet of the water-cooling pipe 23 extend to the outside of the lower mold body 21. The water-cooling pipe 23 is embedded inside the thermally conductive silicone 24. Through the water-cooling pipe 23 connected to an external water circulation device, the lower mold body 21 is cooled by water through the water-cooling pipe 23. At the same time, with the thermally conductive silicone 24, the heat of the lower mold body 21 is quickly absorbed and conducted, thereby improving the heat dissipation efficiency of the lower mold body 21.

[0027] Furthermore, an inner cylinder 32 is fixedly connected to the bottom of the support plate 31, and an outer cylinder 33 is sleeved on the outside of the inner cylinder 32. A threaded cap 34 is threadedly connected to the bottom of the outer cylinder 33. A spring 35 abuts between the inner cylinder 32 and the outer cylinder 33. The spring 35 provides elastic support to the support plate 31. After the support plate 31 is pressed down, the spring 35 contracts, and after the pressure on the support plate 31 is released, the upward rebound of the support plate 31 completes the ejection of the ejector plate 25. The bottom of the threaded cap 34 abuts against the upper surface of the base plate 11.

[0028] Furthermore, each pressing rod 36 is externally threaded with two nuts 37, and the two nuts 37 are respectively located at the upper and lower ends of the adjusting plate 15. The pressing rod 36 is used to press down the support plate 31. Through the installation of the pressing rod 36, the support plate 31 is pressed down during the descent of the adjusting plate 15. Then, the descent of the support plate 31 drives the ejector plate 25 to descend, so that the ejector plate 25 is housed inside the injection cavity of the lower mold body 21.

[0029] Working principle: The cylinder 14 is activated to drive the adjusting plate 15 to descend, so that the upper mold body and the lower mold body 21 are connected to each other, and hot melt plastic is injected into the injection cavity. After the hot melt plastic cools and solidifies, the cylinder 14 rises and drives the adjusting plate 15 to move upward. At this time, the pressure rod 36 rises simultaneously to release the pressure on the support plate 31. The support plate 31 moves upward under the rebound of the spring 35, which in turn drives the ejector plate 25 to rise, so that the molding die inside the injection cavity can be automatically ejected.

[0030] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An automatically ejecting thermoplastic molding die, characterized in that: The injection molding assembly (1) includes a base plate (11), a column (12) is fixedly connected to the top of the base plate (11), and a top plate (13) is fixedly connected to the top of the column (12). A cylinder (14) is fixedly connected to the upper surface of the top plate (13), and an adjusting plate (15) is fixedly connected to the lower part of the cylinder (14) extending through to the bottom of the top plate (13). The lower mold assembly (2) is located below the adjusting plate (15) and includes a lower mold body (21). The lower mold body (21) has an ejector plate (25) slidably disposed at the center of the injection cavity. The ejection assembly (3) includes a support plate (31) and a pressing rod (36). The support plate (31) is fixedly connected to the bottom of the ejection plate (25), and the pressing rod (36) is fixedly connected to the adjusting plate (15). The ejection assembly (3) is used for automatic ejection control of the ejection plate (25).

2. The automatically ejecting thermoplastic molding die according to claim 1, characterized in that: The corner of the adjustment plate (15) is fitted with a sliding sleeve that is compatible with the column (12), and the column (12) is used as an auxiliary guide for the adjustment plate (15) to slide up and down. The lower surface of the adjustment plate (15) is provided with an upper mold body that is compatible with the injection cavity of the lower mold body (21).

3. The automatically ejecting thermoplastic molding die according to claim 2, characterized in that: The lower mold body (21) has a cooling cavity (22) around the injection cavity, and the cooling cavity (22) is provided with a water cooling pipe (23) and a thermally conductive silicone (24). The top of the cooling cavity (22) is fixedly connected with a cover plate (26).

4. The automatically ejecting thermoplastic molding die according to claim 3, characterized in that: The water cooling pipe (23) is arranged in a spiral shape, and the water inlet and outlet of the water cooling pipe (23) extend to the outside of the lower mold body (21). The water cooling pipe (23) is embedded inside the thermally conductive silicone (24).

5. The automatically ejecting thermoplastic molding die according to claim 1, characterized in that: The bottom of the support plate (31) is fixedly connected to an inner cylinder (32), and an outer cylinder (33) is sleeved on the outside of the inner cylinder (32). The bottom of the outer cylinder (33) is threadedly connected to a threaded cap (34), and a spring (35) abuts between the inner cylinder (32) and the outer cylinder (33).

6. The automatically ejecting thermoplastic molding die according to claim 5, characterized in that: Each of the pressing rods (36) is externally threaded with two nuts (37), and the two nuts (37) are located at the upper and lower ends of the adjusting plate (15) respectively. The pressing rods (36) are used to support the plate (31) to press down.

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