Plastic toy injection molding cooling and demolding structure

Abstract

This utility model discloses a cooling and demolding structure for injection molding of plastic toys, including a front fixed plate, a rear fixed plate, a fixed mold, and a movable mold. The fixed mold is fixedly disposed inside the front fixed plate. A hydraulic cylinder is disposed on the rear side of the rear fixed plate. The power end of the hydraulic cylinder is connected to a first movable plate. Multiple support rods are threaded through the first movable plate, extending to the front side of the first movable plate to form a second movable plate. A third movable plate is disposed on the rear side of the movable mold for fixing the movable mold. A demolding ejector rod is disposed on the front side of the second movable plate, penetrating the third movable plate and the movable mold. A spring structure is provided between the second and third movable plates, sleeved on the outside of the demolding ejector rod. The advantages of this utility model compared with the prior art are: by setting multiple movable plates at the rear end of the traditional movable mold, in conjunction with support rods and a demolding ejector rod, this utility model can perform the ejection operation of the product after injection molding, ensuring automated and efficient demolding operation.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to a cooling and demolding structure for injection molding of plastic toys. Background Technology

[0002] Plastic toys are children's toys made primarily of synthetic resins, with common materials including PC, ABS, and POM. They are characterized by strong plasticity and good insulation. Their raw materials are mostly extracted from petroleum and coal, and can be divided into two main categories according to their properties: thermoplastic and thermosetting.

[0003] In the production of plastic toys, injection molding is often used. This method typically involves pressing two molds together and cooling them to form the toy. However, in actual production, the molds are usually removed manually after injection molding, making automatic demolding impossible and resulting in relatively low efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cooling and demolding structure for injection molding of plastic toys, addressing the shortcomings mentioned in the background art.

[0005] To solve the above technical problems, the technical solution provided by this utility model is: a plastic toy injection molding cooling and demolding structure, including a front fixed plate, a rear fixed plate, a fixed mold and a movable mold. The fixed mold is fixedly installed inside the front fixed plate. The rear fixed plate is provided with a hydraulic cylinder for driving the movable mold to move laterally. The fixed mold and the movable mold are respectively provided with a first cooling water channel and a second cooling water channel. The front end of the fixed mold is provided with an injection input pipe. The power end of the hydraulic cylinder is connected to the first movable plate.

[0006] Multiple support rods are provided through the first movable plate. The support rods extend to the front side of the first movable plate and together form a second movable plate. A third movable plate for fixing the movable mold is provided on the rear side of the movable mold. A demolding ejector rod that penetrates the third movable plate and the movable mold is provided on the front side of the second movable plate. A spring structure sleeved on the outside of the demolding ejector rod is provided between the second and third movable plates. Fixed support plates are provided vertically between the first and third movable plates.

[0007] Furthermore, a limiting support structure is provided between the four corners of the front fixed plate and the four corners of the rear fixed plate, which penetrates the four corners of the first movable plate and the third movable plate.

[0008] Furthermore, the inner side of the rear fixing plate is provided with a leveling top block structure that cooperates with the support rod.

[0009] Furthermore, the top of the fixed mold is provided with a first cooling water inlet pipe and a first cooling water outlet pipe that are connected to the first cooling water channel, and both the first cooling water inlet pipe and the first cooling water outlet pipe are provided with a first temperature sensor.

[0010] Furthermore, the top of the movable mold is provided with a first water guide pipe and a second water guide pipe that are connected to the second cooling water channel. The top of the first water guide pipe and the second water guide pipe are provided with water delivery hoses. The two ends of the water delivery hoses are respectively provided with a second cooling water inlet pipe and a second cooling water outlet pipe. The second cooling water inlet pipe and the second cooling water outlet pipe are both provided with a second temperature sensor.

[0011] The advantages of the plastic toy injection molding cooling and demolding structure of this utility model compared with the prior art are as follows: This utility model sets multiple movable plates at the rear end of the traditional movable mold, and together with the support rod and demolding ejector rod, it can perform the ejection operation of the product after injection molding, which can ensure automated and efficient demolding operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first structure of the injection molding cooling and demolding structure for plastic toys.

[0013] Figure 2 This is a schematic diagram of the second structure of the injection molding cooling and demolding structure for plastic toys.

[0014] Figure 3 This is a cross-sectional view of the injection molding cooling and demolding structure of a plastic toy.

[0015] As shown in the figure: 1. Front fixed plate; 2. Rear fixed plate; 3. Fixed mold; 4. Movable mold; 5. Hydraulic cylinder; 6. First movable plate; 7. Support rod; 8. Second movable plate; 9. Third movable plate; 10. Ejector pin; 11. Spring structure; 12. Leveling block structure; 13. Injection input pipe; 14. Limiting support rod structure; 15. First cooling water inlet pipe; 16. First cooling water outlet pipe; 17. First cooling water channel; 18. First temperature sensor; 19. First water guide pipe; 20. Second water guide pipe; 21. Water supply hose; 22. Second cooling water inlet pipe; 23. Second cooling water outlet pipe; 24. Second temperature sensor; 25. Second cooling water channel. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Combined with appendix Figure 1-3A plastic toy injection molding cooling and demolding structure includes a front fixed plate 1, a rear fixed plate 2, a fixed mold 3, and a movable mold 4. The fixed mold 3 is fixedly installed inside the front fixed plate 1. The rear fixed plate 2 has a hydraulic cylinder 5 for driving the movable mold 4 to move laterally. The hydraulic cylinder 5 needs to be equipped with external oil pipes, oil valves, and oil pumps, which are common auxiliary equipment for hydraulic cylinders, so they will not be described in detail. The fixed mold 3 and the movable mold 4 are respectively provided with a first cooling water channel 17 and a second cooling water channel 25. The front end of the fixed mold 3 is provided with an injection input pipe 13. Through the close fit between the fixed mold 3 and the movable mold 4, the injection input pipe 13 injects molten plastic. The first cooling water channel 17 and the second cooling water channel 25 ensure continuous cooling. The product is formed inside the fixed mold 3 and the movable mold 4. The hydraulic cylinder 5 drives the movable mold 4 to pull back, and the formed product can be removed. The above structure is a common injection molding cooling mold structure, so it will not be described in detail.

[0018] The hydraulic cylinder 5 has a power end connected to the first movable plate 6. Multiple support rods 7 are threaded through the first movable plate 6. The inner side of the rear fixed plate 2 has a leveling block structure 12 that cooperates with the support rods 7. As shown in the figure, multiple support rods and leveling block structures 12 are provided. It is necessary to ensure that the rear ends of the multiple support rods 7 and the front ends of the multiple leveling block structures 12 are on the same plane for simultaneous support operation. The support rods 7 extend to the front side of the first movable plate 6 and share a second movable plate 8. The rear side of the movable mold 4 has a third movable plate 9 for fixing the movable mold 4. The front side of the second movable plate 8 has a demolding ejector rod 10 that penetrates the third movable plate 9 and the movable mold 4. A spring structure 11 is provided between the second movable plate 8 and the third movable plate 9, sleeved on the outside of the demolding ejector rod 10. Fixed support plates 26 are provided vertically between the first movable plate 6 and the third movable plate 9. 11. High-strength springs are required. The above structure is an automatic demolding structure. The hydraulic cylinder 5 drives the first movable plate 6 to move forward. The fixed support plate 26 can push the third movable plate 9 and the movable mold 4 to move forward, so that the fixed mold 3 and the movable mold 4 fit together. After injection molding, the hydraulic cylinder 5 drives the first movable plate 6 to pull backward until the support rod 7 hits the leveling block structure 12. Multiple support rods 7 will hit the leveling block structure 12. Then the second movable plate 8 will move away from the first movable plate 6 and gradually move closer to the third movable plate 9. Then the demolding ejector rod 10 will be ejected, removing the object attached to the movable mold 4. This ejection mold is generally only suitable for products with concave structures, that is, products that will be attached to the movable mold 4 after the hydraulic cylinder 5 drives the movable mold 4 to pull back. When the demolding ejector rod 10 is not ejected, it is necessary to ensure that the end of the demolding ejector rod 10 is as close as possible to the movable mold 4 to prevent excessive burrs from being generated on the product.

[0019] The front fixed plate 1 and the rear fixed plate 2 are provided with limiting support rod structures 14 that pass through the four corners of the first movable plate 6 and the third movable plate 9. The limiting support rod structures 14 can ensure that the first movable plate 6 and the third movable plate 9 can move laterally stably.

[0020] The top of the fixed mold 3 is provided with a first cooling water inlet pipe 15 and a first cooling water outlet pipe 16 that are connected to the first cooling water channel 17. Both the first cooling water inlet pipe 15 and the first cooling water outlet pipe 16 are provided with a first temperature sensor 18. The first temperature sensor 18 can change the circulation efficiency of the cooling water according to the temperature change to ensure the injection molding cooling quality.

[0021] The movable mold 4 is provided with a first water guide pipe 19 and a second water guide pipe 20 connected to the second cooling water channel 25. The top of the first water guide pipe 19 and the second water guide pipe 20 are provided with water delivery hoses 21. The water delivery hoses 21 at both ends are respectively provided with a second cooling water inlet pipe 22 and a second cooling water outlet pipe 23. The second cooling water inlet pipe 22 and the second cooling water outlet pipe 23 are both provided with a second temperature sensor 24. Because the movable mold 4 will move back and forth slightly, the water delivery hoses 21 are provided to facilitate the movement of the movable mold 4 while water is injected. At the same time, the second temperature sensor 24 can change the circulation efficiency of the cooling water according to the temperature change to ensure the quality of injection molding cooling.

[0022] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A cooling and demolding structure for injection molding of plastic toys, comprising a front fixed plate (1), a rear fixed plate (2), a fixed mold (3), and a movable mold (4), wherein the fixed mold (3) is fixedly disposed inside the front fixed plate (1), and the rear fixed plate (2) is provided with a hydraulic cylinder (5) for driving the movable mold (4) to move laterally, wherein the fixed mold (3) and the movable mold (4) are respectively provided with a first cooling water channel (17) and a second cooling water channel (25), and the front end of the fixed mold (3) is provided with an injection input pipe (13), characterized in that: The hydraulic cylinder (5) has a power end connected to the first movable plate (6); Multiple support rods (7) are provided through the first movable plate (6). The support rods (7) extend to the front side of the first movable plate (6) and together provide a second movable plate (8). A third movable plate (9) for fixing the movable mold (4) is provided on the rear side of the movable mold (4). A demolding ejector rod (10) is provided on the front side of the second movable plate (8) and passes through the third movable plate (9) and the movable mold (4). A spring structure (11) sleeved on the outside of the demolding ejector rod (10) is provided between the second movable plate (8) and the third movable plate (9). Fixed support plates (26) are provided vertically between the first movable plate (6) and the third movable plate (9).

2. The injection molding cooling and demolding structure for plastic toys according to claim 1, characterized in that: A limiting support structure (14) is provided between the four corners of the front fixed plate (1) and the four corners of the rear fixed plate (2), which passes through the four corners of the first movable plate (6) and the third movable plate (9).

3. The injection molding cooling and demolding structure for plastic toys according to claim 1, characterized in that: The rear fixing plate (2) is provided with a leveling top block structure (12) that matches the support rod (7) on the inner side.

4. The injection molding cooling and demolding structure for plastic toys according to claim 1, characterized in that: The top of the fixed mold (3) is provided with a first cooling water inlet pipe (15) and a first cooling water outlet pipe (16) that are connected to the first cooling water channel (17). The first cooling water inlet pipe (15) and the first cooling water outlet pipe (16) are both provided with a first temperature sensor (18).

5. The injection molding cooling and demolding structure for plastic toys according to claim 1, characterized in that: The top of the movable mold (4) is provided with a first water guide pipe (19) and a second water guide pipe (20) that are connected to the second cooling water channel (25). The top of the first water guide pipe (19) and the second water guide pipe (20) are provided with water delivery hoses (21). The water delivery hoses (21) at both ends are respectively provided with a second cooling water inlet pipe (22) and a second cooling water outlet pipe (23). The second cooling water inlet pipe (22) and the second cooling water outlet pipe (23) are both provided with a second temperature sensor (24).

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