A mould for forming a plastic part of an electric appliance
By combining a lifting mechanism with a semiconductor cooling chip, automated and rapid demolding and cooling of electrical plastic parts are achieved, solving the problems of difficult demolding and slow cooling in traditional molds and improving production efficiency.
Patent Information
- Application Number
- CN202521706902.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-12
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-12
AI Technical Summary
After injection molding, traditional molds tightly bond the plastic product to the mold wall, making demolding difficult and requiring manual operation, which affects production efficiency. Furthermore, the soft plastic is prone to deformation at high temperatures, extending the production cycle.
An automatic and rapid demolding mechanism is adopted to achieve automatic demolding, and a semiconductor cooling mechanism is used to accelerate cooling. The combination of hydraulic push rod and semiconductor cooling device design realizes automatic demolding and rapid cooling.
This eliminates the need for manual demolding, shortens cooling time, improves production efficiency, and meets the market's demand for rapid response.
Smart Images
Figure CN224675438U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical appliance plastic parts technology, and in particular to a molding die for rapid unloading of electrical appliance plastic parts. Background Technology
[0002] Plastic components for electrical appliances play an important role in modern electrical products, mainly providing structural support, insulation protection, and aesthetic design. In the modern electrical manufacturing industry, the production of plastic components usually adopts injection molding. With the advancement of technology and the increase in market demand, the efficiency and quality of injection molding have become important factors in enterprise competition. Therefore, there is a need for a molding die for quick unloading of plastic components for electrical appliances.
[0003] After injection molding, traditional molds often result in plastic products tightly bonded to the mold wall, which can cause strong adhesion between the plastic parts and the mold during the cooling process. To remove the finished product from the mold, manual demolding is often required, which not only increases labor intensity but also reduces production efficiency. In addition, the surface temperature of freshly injected plastic parts is high and their hardness is relatively soft. This makes it easy for the parts to deform when demolded before they have cooled sufficiently. To prevent this, demolding must be performed only after the parts have cooled to a certain temperature. This process not only prolongs the production cycle but also affects the overall operating efficiency of the production line, making it difficult to meet the requirements of rapid response to market demands. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a molding die for rapid unloading of electrical plastic parts.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A molding die for rapid unloading of electrical appliance plastic parts includes a base plate, a top plate on top of the base plate, a lifting mechanism for raising and lowering the top plate, an upper module fixed at the bottom center of the top plate, a U-shaped frame fixed at the top center of the base plate, a U-shaped plate fixed to the inner side wall of the U-shaped frame, a connecting plate on top of the U-shaped plate, a rectangular hole in the top center of the connecting plate, a lifting mechanism for lifting the connecting plate on top of the base plate, a lower module inside the U-shaped frame, and columns fixed at both ends of the bottom of the lower module. Each column is fixed to the base plate. The lower module is adapted to the rectangular hole and has a hollow structure. The lower module is equipped with a cooling mechanism for cooling down the lower module. During use, the device achieves automatic and rapid demolding through the design of the lifting mechanism, eliminating the need for manual demolding, saving time and improving work efficiency. The cooling mechanism can cool the surface of the lower module, which can quickly cool the plastic parts, reducing cooling time and shortening the overall production cycle, thus improving production efficiency.
[0007] Preferably, a plastic melting furnace is fixed to the top of the top plate, and a guide pipe is provided through the side wall of the plastic melting furnace, with one end of the guide pipe penetrating the inner side wall of the upper module. The lifting mechanism includes four hydraulic push rods, which are respectively fixed at the four corners of the top of the bottom plate, and the output ends of the four hydraulic push rods are all fixed to the top plate. The lifting mechanism includes two sleeves, which are symmetrically fixed to the top of the bottom plate, and both sleeves are located inside the U-shaped frame. A slider is slidably connected to the inner side wall of each of the two sleeves, and a connecting rod is fixed to the top of each of the two sliders. One end of each connecting rod passes through the top of the two sleeves, and one end of each connecting rod is fixed to a connecting plate. A spring is provided inside each of the two sleeves, and the two springs are respectively located at... Below the two sliders, plastic is placed inside the plastic melting furnace and heated to a molten state. During injection molding, four hydraulic push rods simultaneously move the top plate downwards, which in turn moves the upper module downwards towards the connecting plate. When the upper module contacts the connecting plate, it continues to move downwards, pushing the connecting plate closer to the U-shaped plate. As the U-shaped plate moves downwards, it works in conjunction with two connecting rods to move the two sliders downwards along the inner walls of the two sleeves, causing the two springs to gradually compress. When the U-shaped plate contacts the top of the connecting plate, it stops moving downwards. At this point, the lower module is located inside the upper module. Molten plastic is then injected through the feed pipe between the upper and lower modules to form electrical plastic parts.
[0008] Preferably, the cooling mechanism includes a thermoelectric cooler. The lower module has a mounting hole at its bottom, and the thermoelectric cooler is fixed to the side wall of the mounting hole. Multiple first fins are fixed at equal intervals on the cold end of the thermoelectric cooler, and all the first fins are fixed to the lower module. Multiple second fins are fixed at equal intervals on the hot end of the thermoelectric cooler. When the thermoelectric cooler is energized, its cold end temperature drops rapidly, thereby rapidly reducing the surface temperature of the multiple first fins. This cools the surface of the lower module and the injection-molded plastic parts, reducing the cooling time of the plastic parts. This process not only reduces the production cycle but also improves the overall operating efficiency of the production line, enabling a rapid response to market demands.
[0009] Preferably, the two outer side walls of the symmetrical U-shaped frame are provided with heat dissipation windows, and the two U-shaped plates are located below the U-shaped plates. Through the design of the heat dissipation windows, the heat generated by the hot end of the semiconductor cooling chip can be discharged to the outside of the U-shaped frame.
[0010] The beneficial effects of this utility model are as follows:
[0011] 1. During use, this device achieves automatic and rapid demolding through the design of the lifting mechanism, eliminating the need for manual demolding, saving time and improving work efficiency.
[0012] 2. The cooling mechanism allows for rapid cooling of the lower module surface, reducing cooling time and thus shortening the overall production cycle and improving production efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the molding die for rapid unloading of electrical plastic parts proposed in this utility model.
[0014] Figure 2 This utility model provides a schematic diagram of a plastic melting furnace, a feed pipe, and an upper module for a molding die for rapid unloading of electrical plastic parts.
[0015] Figure 3 This is a schematic cross-sectional view of the spiral frame of a molding die for rapid unloading of electrical plastic parts proposed in this utility model.
[0016] Figure 4 An exploded view of the forming plate, connecting plate, lower module, and sleeve of a molding die for rapid unloading of electrical plastic parts proposed in this utility model;
[0017] Figure 5 This is a schematic cross-sectional view of the lower module of a molding die for rapid unloading of electrical plastic parts proposed in this utility model.
[0018] Figure 6 This is a cross-sectional schematic diagram of the forming plate, connecting plate, and sleeve of a molding die for rapid unloading of electrical plastic parts proposed in this utility model.
[0019] In the diagram: 1. Base plate; 2. Top plate; 3. Hydraulic push rod; 4. U-shaped frame; 5. Heat dissipation window; 6. Plastic melting furnace; 7. Material guide pipe; 8. Upper module; 9. U-shaped plate; 10. Connecting plate; 11. Lower module; 12. Sleeve; 13. Column; 14. Rectangular hole; 15. Semiconductor cooling chip; 16. First fin; 17. Second fin; 18. Slider; 19. Connecting rod; 20. Spring. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] Reference Figures 1-6 A molding die for rapid unloading of plastic parts for electrical appliances includes a base plate 1, a top plate 2 on top of the base plate 1, a lifting mechanism for raising and lowering the top plate 2, an upper module 8 fixed at the bottom center of the top plate 2, a U-shaped frame 4 fixed at the top center of the base plate 1, a U-shaped plate 9 fixed to the inner wall of the U-shaped frame 4, a connecting plate 10 on top of the U-shaped plate 9, a rectangular hole 14 at the top center of the connecting plate 10, a lifting mechanism for lifting the connecting plate 10 on top of the base plate 1, a lower module 11 inside the U-shaped frame 4, and columns 13 fixed at both ends of the bottom of the lower module 11. The columns 13 are all fixed to the base plate 1. The lower module 11 is adapted to the rectangular hole 14, and the lower module 11 has a hollow structure. The lower module 11 is equipped with a cooling mechanism for cooling down the lower module 11. During use, the device achieves automatic and rapid demolding through the design of the lifting mechanism, eliminating the need for manual demolding, saving time and improving work efficiency. Through the design of the cooling mechanism, the surface of the lower module 11 can be cooled down, which can quickly cool down the plastic parts, reduce the cooling time, thereby shortening the overall production cycle and improving production efficiency.
[0022] Furthermore, a plastic melting furnace 6 is fixed to the top of the top plate 2. A guide pipe 7 is provided through the side wall of the plastic melting furnace 6, and one end of the guide pipe 7 passes through the inner side wall of the upper module 8. The lifting mechanism includes four hydraulic push rods 3, which are respectively fixed at the four corners of the top of the bottom plate 1, and the output ends of the four hydraulic push rods 3 are all fixed to the top plate 2. The lifting mechanism includes two sleeves 12, which are symmetrically fixed to the top of the bottom plate 1, and both sleeves 12 are located inside the loop frame 4. Sliding sliders 18 are slidably connected to the inner side walls of both sleeves 12. Connecting rods 19 are fixed to the top of both sliders 18, and one end of each connecting rod 19 passes through the top of the two sleeves 12. One end of each connecting rod 19 is fixed to the connecting plate 10. Springs 20 are provided inside both sleeves 12, and the two springs 20 are located on the two sliders 18 respectively. Below, plastic is placed inside the plastic melting furnace 6 and heated to a molten state. During injection molding, four hydraulic push rods 3 simultaneously drive the top plate 2 downward, which in turn drives the upper module 8 downward toward the connecting plate 10. When the upper module 8 and the connecting plate 10 come into contact, the upper module 8 continues to move downward and pushes the connecting plate 10 toward the U-shaped plate 9. As the U-shaped plate 9 moves downward, it works in conjunction with two connecting rods 19 to drive two sliders 18 to move downward along the inner walls of the two sleeves 12, thereby causing the two springs 20 to gradually compress. When the top of the U-shaped plate 9 and the connecting plate 10 come into contact, the U-shaped plate 9 stops moving downward. At this time, the lower module 11 is located inside the upper module 8. Molten plastic is then injected through the guide pipe 7 into the space between the upper module 8 and the lower module 11 to form electrical plastic parts.
[0023] Furthermore, the cooling mechanism includes a thermoelectric cooler 15. A mounting hole is provided at the bottom of the lower module 11, and the thermoelectric cooler 15 is fixed to the side wall of the mounting hole. Multiple first fins 16 are fixed at equal intervals on the cold end of the thermoelectric cooler 15, and all the first fins 16 are fixed to the lower module 11. Multiple second fins 17 are fixed at equal intervals on the hot end of the thermoelectric cooler 15. When the thermoelectric cooler 15 is energized, its cold end temperature drops rapidly, thereby rapidly reducing the surface temperature of the multiple first fins 16. This cools the surface of the lower module 11 and cools the injection-molded plastic parts, reducing the cooling time of the plastic parts. This process not only reduces the production cycle but also improves the overall operating efficiency of the production line, enabling a rapid response to market demands.
[0024] Furthermore, heat dissipation windows 5 are provided on both symmetrical outer side walls of the U-shaped frame 4, and both U-shaped plates 9 are located below the U-shaped plates 9. Through the design of the heat dissipation windows 5, the heat generated by the hot end of the semiconductor cooling chip 15 can be discharged to the outside of the U-shaped frame 4.
[0025] Working Principle: During operation, plastic is placed inside the plastic melting furnace 6 and heated to a molten state. During injection molding, four hydraulic push rods 3 simultaneously move the top plate 2 downwards, which in turn moves the upper module 8 downwards towards the connecting plate 10. When the upper module 8 contacts the connecting plate 10, it continues to move downwards, pushing the connecting plate 10 closer to the U-shaped plate 9. As the U-shaped plate 9 moves downwards, it coordinates with two connecting rods 19 to move two sliders 18 downwards along the inner walls of the two sleeves 12, thereby gradually compressing the two springs 20. When the top of the U-shaped plate 9 contacts the connecting plate 10, it stops moving downwards. At this point, the lower module 11 is located inside the upper module 8. Molten plastic is then injected through the guide pipe 7 into the space between the upper module 8 and the lower module 11, forming electrical plastic parts. After injection molding is completed, the power switch of the semiconductor cooling chip 15 is turned on, and the semiconductor cooling chip 15... After being energized, the cold end temperature drops rapidly, which in turn causes the surface temperature of the multiple first fins 16 to drop rapidly, thus cooling the surface of the lower module 11 and the injection-molded plastic parts. This reduces the cooling time of the plastic parts, which not only shortens the production cycle but also improves the overall operating efficiency of the production line, enabling a rapid response to market demands. After cooling, four hydraulic push rods 3 are driven to move the top plate 2 upward, causing the upper module 8 and the lower module 11 to gradually separate. During the upward movement of the upper module 8, the two compressed springs 20 gradually return to their original state. During this return process, the two sliders 18 push the two connecting rods 19 upward, which in turn pushes the connecting plate 10 upward along the side wall of the lower module 11, lifting the plastic parts attached to the surface of the lower module 11. This allows the plastic parts to separate from the lower module 11, completing the demolding process without the need for manual demolding, saving time and improving work efficiency.
[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A molding die for rapid unloading of electrical appliance plastic parts, comprising a base plate (1), characterized in that, The base plate (1) is provided with a top plate (2) on top. The base plate (1) is provided with a lifting mechanism for raising and lowering the top plate (2). An upper module (8) is fixed at the middle of the bottom of the top plate (2). A U-shaped frame (4) is fixed at the middle of the top of the base plate (1). A U-shaped plate (9) is fixed on the inner side wall of the U-shaped frame (4). A connecting plate (10) is provided on the top of the U-shaped plate (9). A rectangular hole (14) is opened at the middle of the top of the connecting plate (10). The top of the plate (1) is provided with a lifting mechanism for lifting the connecting plate (10). The inside of the U-shaped frame (4) is provided with a lower module (11). The bottom ends of the lower module (11) are fixed with columns (13), and both columns (13) are fixed to the bottom plate (1). The lower module (11) is adapted to the rectangular hole (14), and the lower module (11) is a cavity structure. The inside of the lower module (11) is provided with a cooling mechanism for cooling the lower module (11).
2. The molding die for rapid unloading of electrical plastic parts according to claim 1, characterized in that, A plastic melting furnace (6) is fixed on the top of the top plate (2). A material guide pipe (7) is provided through the side wall of the plastic melting furnace (6), and one end of the material guide pipe (7) passes through the inner side wall of the upper module (8).
3. The molding die for rapid unloading of electrical plastic parts according to claim 1, characterized in that, The lifting mechanism includes four hydraulic push rods (3), which are fixed at the four corners of the top of the base plate (1), and the output ends of the four hydraulic push rods (3) are fixed to the top plate (2).
4. The molding die for rapid unloading of electrical plastic parts according to claim 1, characterized in that, The lifting mechanism includes two sleeves (12), which are symmetrically fixed to the top of the base plate (1) and both sleeves (12) are located inside the loop frame (4). The inner sidewalls of the two sleeves (12) are slidably connected to sliders (18). The top of the two sliders (18) is fixed with connecting rods (19), and one end of the two connecting rods (19) passes through the top of the two sleeves (12). One end of the two connecting rods (19) is fixed to the connecting plate (10). The two sleeves (12) are provided with springs (20), and the two springs (20) are located below the two sliders (18).
5. The molding die for rapid unloading of electrical plastic parts according to claim 1, characterized in that, The cooling mechanism includes a semiconductor cooling chip (15). The lower module (11) has a mounting hole at its bottom. The semiconductor cooling chip (15) is fixed to the side wall of the mounting hole. Multiple first fins (16) are fixed at equal distances on the cold end of the semiconductor cooling chip (15), and the multiple first fins (16) are all fixed to the lower module (11). Multiple second fins (17) are fixed at equal distances on the hot end of the semiconductor cooling chip (15).
6. The molding die for rapid unloading of electrical plastic parts according to claim 1, characterized in that, The two outer side walls of the symmetrical ring frame (4) are provided with heat dissipation windows (5), and the two ring plates (9) are located below the ring plates (9).