Plastic mold with built-in water cooling system

Abstract

The utility model belongs to the field of material forming and processing, and particularly relates to a plastic mold with a built-in water cooling system, which comprises a lower mold and an upper mold which are arranged in an up-down opposite and attached manner, are accurately butted and matched to jointly form a cavity for forming a plastic product, and further comprises a water cooling component, and a water cooling assembly is arranged between the upper mold and the lower mold. Through cooperative operation of a water tank, a cooler, a water pump, a connecting pipe, a backflow pipe and a cooling pipe in the water cooling assembly, circulating flow of cooling liquid in the plastic mold is achieved, heat generated by the plastic mold in the plastic forming process can be rapidly and effectively absorbed through the circulating flow, the temperature of the plastic mold is greatly reduced, and the service life of the plastic mold is prolonged. The cooling and curing time of plastic products is effectively shortened, the production efficiency is improved, and the development requirements of the modern manufacturing industry are met.

Description

Technical Field

[0001] This utility model belongs to the field of material forming and processing, and in particular relates to a plastic mold with a built-in water cooling system. Background Technology

[0002] A plastic mold is a key piece of equipment used in the production of plastic products. Through a specifically designed structure and cavity shape, molten plastic raw material is injected into the mold under high temperature and pressure. After cooling and solidification, a plastic product conforming to the mold cavity is formed. Plastic molds not only determine the product's dimensions and surface quality but also directly affect production efficiency and product consistency, making them an indispensable core tool in plastic molding and processing.

[0003] However, traditional plastic molds are relatively simple in structure, usually consisting of only two basic parts: a moving mold and a fixed mold. After injection molding, plastic products mainly rely on natural cooling to cool down. Since natural cooling is relatively slow and the cooling process is affected by various factors such as ambient temperature and mold material, plastic products need to take a long time to fully solidify, which makes it difficult to meet the needs of modern manufacturing for high-efficiency, high-quality and automated production.

[0004] Therefore, a plastic mold with a built-in water cooling system is particularly needed to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings of traditional plastic molds, such as simple structure, reliance on natural cooling after injection molding, slow cooling speed, and long curing time due to various factors, which makes it difficult to meet the needs of modern manufacturing for high-efficiency, high-quality and automated production, this utility model provides a plastic mold with a built-in water cooling system.

[0006] This utility model is achieved through the following technical means: a plastic mold with a built-in water cooling system, including a lower mold and an upper mold, which are arranged in a vertical and close fit, precisely docking and cooperating to form a cavity for molding plastic products, and also including a water cooling component, which is provided between the upper mold and the lower mold.

[0007] Furthermore, the water-cooling assembly includes a water tank, bolts and nuts, a cooler, a water pump, connecting pipes, a return pipe, a threaded sleeve, and cooling pipes. A water tank is installed on one side of both the upper and lower molds via two bolts and nuts distributed front and rear. The water tanks contain coolant, and each water tank contains a cooler. A flexible connecting pipe and a return pipe are fixedly connected to one side of each water tank. The return pipe is located behind the connecting pipe, and the outlet end of each return pipe is fixedly connected to the corresponding water tank. The inlet end of each connecting pipe extends into the corresponding water tank, and the outlet end extends to the outside of the corresponding water tank. Each water pump is installed on the inlet end of each connecting pipe. The water pump is located inside the corresponding water tank, and the pump's suction end is close to the inner bottom surface of the corresponding water tank. The outlet end of each connecting pipe and the inlet end of each return pipe are rotatably equipped with threaded sleeves. An n-type cooling pipe is fixedly connected inside the lower mold and the upper mold. Its two cut ends are the inlet end and the outlet end, respectively. The inlet end is located in front of the outlet end and is connected to the outlet end of the same horizontal connecting pipe. The threaded sleeve on the connecting pipe is threadedly connected to the inlet end of the cooling pipe. The outlet end of the cooling pipe is connected to the inlet end of the same horizontal return pipe. The threaded sleeve on the return pipe is threadedly connected to the outlet end of the cooling pipe, forming a complete coolant circulation loop.

[0008] Furthermore, it also includes frames, rotating wheels, large gears, small gears, and fans. Each cooling pipe is fixed with multiple frames arranged in two rows and two columns. Each rotating wheel is rotatably set inside each frame, with one end extending to the outside of the frame and fixed with a large gear. The edge of each rotating wheel is close to the inner side wall of the corresponding frame. Multiple fans are rotatably set on both the lower mold and the upper mold, distributed along a rectangular direction. The connecting shaft of each fan passes into the interior of the lower mold or the upper mold and is fixed with a small gear. The number of small gears is the same as that of large gears, and they mesh with each other in a one-to-one correspondence.

[0009] Furthermore, it also includes protective frames. Multiple protective frames are installed on the exterior of both the lower and upper molds in two rows and two columns, with each protective frame covering the corresponding fan.

[0010] Furthermore, it also includes dustproof netting, with a dustproof netting fixed to one side of each protective frame.

[0011] Furthermore, a layer of sealant is applied to the threaded protrusions on the inner wall of each threaded sleeve.

[0012] Beneficial effects: 1. Through the coordinated operation of the water tank, cooler, water pump, connecting pipe, return pipe and cooling pipe in the water cooling component, the coolant is circulated in the plastic mold. This circulation can quickly and effectively absorb the heat generated by the plastic mold during the plastic molding process, greatly reduce the temperature of the plastic mold, effectively shorten the cooling and curing time of plastic products, improve production efficiency, and meet the development needs of modern manufacturing industry.

[0013] 2. Through the linkage design of the frame, rotating wheel, large gear, small gear and fan, the energy of the coolant flow is fully utilized to drive the fan to rotate, realize air-cooled auxiliary heat dissipation, further enhance the heat dissipation effect of plastic mold, shorten the cooling time of plastic products and improve production efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the lower mold, bolts and nuts, cooler and water pump components of this utility model.

[0016] Figure 3 This is a partial sectional view of the lower mold component of this utility model.

[0017] Figure 4 This is a partial cross-sectional view of the frame component of this utility model.

[0018] In the attached diagram, the following labels are used: 1-lower mold, 2-upper mold, 3-water tank, 4-bolt and nut, 5-cooler, 6-water pump, 7-connecting pipe, 71-return pipe, 8-threaded sleeve, 9-cooling pipe, 10-frame, 11-rotating wheel, 12-large gear, 13-small gear, 14-fan, 15-protective frame, 16-dustproof net. Detailed Implementation

[0019] Example: A plastic mold with a built-in water cooling system, such as Figures 1-4 As shown, it includes a lower mold 1 and an upper mold 2, which are arranged in a vertical and close fit, precisely docking and cooperating to form a cavity for molding plastic products. It also includes a water cooling component, which is provided between the upper mold 2 and the lower mold 1.

[0020] like Figures 1-4As shown, the water-cooling assembly includes a water tank 3, bolts and nuts 4, a cooler 5, a water pump 6, a connecting pipe 7, a return pipe 71, a threaded sleeve 8, and a cooling pipe 9. The upper mold 2 and the lower mold 1 are each connected to a water tank 3 on the right side by two bolts and nuts 4 distributed front and rear. The water tank 3 is filled with coolant, which is an aqueous solution of ethylene glycol with good thermal conductivity and chemical stability. Its concentration can be adjusted according to the actual working environment and cooling requirements. Each water tank 3 is bolted to a cooler 5. The cooler 5 adopts a high-efficiency plate heat exchanger structure, composed of a series of thin metal plates. The coolant and the external cooling medium flow counter-currently on both sides of the plates. Efficient heat exchange via thin plates allows for rapid dissipation of heat absorbed by the coolant to the external environment, ensuring the coolant remains at a consistently low temperature. Each water tank 3 has a flexible connecting pipe 7 and a return pipe 71 bonded to its left side. The return pipe 71 is located behind the connecting pipe 7. Their arrangement is logical and prevents interference. The outlet of each return pipe 71 is fixedly connected to the corresponding water tank 3. The inlet of each connecting pipe 7 extends into the corresponding water tank 3, while the outlet extends to the outside. Each water pump 6 is bolted to the inlet of each connecting pipe 7 and located inside the corresponding water tank 3, with the pump's suction end close to the corresponding water tank 3. The inner bottom surface can fully utilize the coolant in the water tank 3, ensuring that the water pump 6 can draw most of the water in the water tank 3, guaranteeing a sufficient supply of cooling water. Each connecting pipe 7's outlet end and each return pipe 71's inlet end are rotatably fitted with a threaded sleeve 8. An n-shaped cooling pipe 9 is bonded to the inside of both the lower mold 1 and the upper mold 2, with its two cut ends being the inlet and outlet ends, respectively. The inlet end is located in front of the outlet end and mates with the outlet end of the same transverse connecting pipe 7. The threaded sleeve 8 on the connecting pipe 7 is threadedly engaged with the inlet end of the cooling pipe 9. Through this engagement, the outlet end of the connecting pipe 7 and the inlet end of the cooling pipe 9 are tightly connected. The outlet end of the cooling pipe 9 is connected to the inlet end of the same transverse return pipe 71, and the threaded sleeve 8 on the return pipe 71 is threadedly engaged with the outlet end of the cooling pipe 9. Through this engagement, the inlet end of the return pipe 71 and the outlet end of the cooling pipe 9 are tightly connected to form a complete coolant circulation loop. A layer of sealant is coated on the threaded protrusions on the inner wall of each threaded sleeve 8. The sealant can fill the tiny gaps between the threads and effectively prevent water leakage. By unscrewing the threaded sleeve 8 from the cooling pipe 9 and removing the bolt and nut 4, the water tank 3 can be removed from the lower mold 1 or the upper mold 2, which facilitates the maintenance and repair of the water tank 3 or the water pump 6.

[0021] like Figure 1 , Figure 3 and Figure 4As shown, it also includes a frame 10, rotating wheels 11, a large gear 12, a small gear 13, a fan 14, a protective frame 15, and a dustproof net 16. Each cooling pipe 9 has four frames 10 welded to it in two rows and two columns. Each rotating wheel 11 is rotatably mounted inside each frame 10, with its outward-facing end extending to the outside of the frame 10 where a large gear 12 is welded. The edge of each rotating wheel 11 is tightly attached to the inner wall of the corresponding frame 10, ensuring that the coolant flowing from the cooling pipe 9 into the frame 10 will inevitably interact with the rotating wheel 11. When contact occurs, four fans 14 are rotatably mounted on both the lower mold 1 and the upper mold 2, distributed along a rectangular direction. The connecting shaft of each fan 14 passes into the interior of the lower mold 1 or the upper mold 2 and is welded with a small gear 13. The number of small gears 13 and large gears 12 are the same, and they mesh with each other in a one-to-one correspondence. The exterior of both the lower mold 1 and the upper mold 2 is bolted with four protective frames 15 arranged in two rows and two columns. Each protective frame 15 covers the corresponding fan 14, and a dustproof net 16 is welded to the outward side of each protective frame 15.

[0022] After the plastic melt is injected into the cavity formed by the lower mold 1 and the upper mold 2, and after molding processes such as pressure holding, it is necessary to wait for the plastic product in the cavity to cool and solidify. At this time, two water pumps 6 are started, and after they run, they quickly extract the coolant from the two water tanks 3 and send the extracted coolant into the two connecting pipes 7, which then continue to send it into the two cooling pipes 9.

[0023] When the coolant enters the two cooling pipes 9, it comes into close contact with the lower mold 1 and the upper mold 2. Since the coolant temperature is low, while the lower mold 1 and the upper mold 2 absorb a lot of heat during the plastic molding process and are at a high temperature, a significant temperature difference is generated between the lower mold 1 and the upper mold 2 and the two cooling pipes 9, resulting in heat exchange. The coolant continuously absorbs the heat from the lower mold 1 and the upper mold 2, causing the temperature of the lower mold 1 and the upper mold 2 to gradually decrease, providing favorable conditions for the rapid cooling of the plastic product. After the coolant has finished cooling the lower mold 1 and the upper mold 2, it flows out through the two cooling pipes 9 and then flows back into the two water tanks 3 through the two return pipes 71, realizing the circulation of the coolant throughout the water cooling system.

[0024] During the water cooling process, the two coolers 5 exchange heat with the external cooling medium (i.e., air) to continuously reduce the temperature of the coolant in the two water tanks 3, ensuring that the coolant always maintains a low temperature, thereby maintaining good cooling capacity and ensuring a stable and reliable cooling effect on the lower mold 1 and the upper mold 2.

[0025] As the coolant flows through the cooling pipe 9, it also flows inside the frame 10. The powerful water flow generated by the coolant's flow directly acts on the rotating wheel 11, causing it to start rotating. The rotating wheel 11 drives the large gear 12 to rotate together and mesh with the small gear 13. This, in turn, drives the small gear 13 to drive the fan 14 to rotate in the opposite direction. When the fan 14 rotates in the opposite direction, it causes the air around the lower mold 1 and the upper mold 2 to flow rapidly, forming an effective air cooling effect. This accelerates the heat dissipation process of the lower mold 1 and the upper mold 2, improves the overall cooling efficiency, and allows the plastic products to cool and form faster.

[0026] Once the plastic products inside the lower mold 1 and the upper mold 2 have completely cooled and solidified, the two water pumps 6 are turned off, and the entire water cooling system stops operating, waiting for the next production cycle.

Claims

1. A plastic mold with built-in water cooling system, comprising a lower mold (1) and an upper mold (2), which are arranged in an upper-lower opposite and adhering manner, and are precisely connected and matched to form a cavity for molding a plastic product, characterized in that, The water cooling assembly is arranged between the upper die (2) and the lower die (1).

2. A plastic mold with a built-in water cooling system according to claim 1, characterized in that, The water cooling assembly comprises a water tank (3), a bolt and a nut (4), a cooler (5), a water pump (6), a connecting pipe (7), a return pipe (71), a threaded sleeve (8) and a cooling pipe (9). The upper die (2) and the lower die (1) are each provided with two bolt and nut (4) arranged in front and back, and one water tank (3) is installed on one side of the upper die (2) and the lower die (1). The water tank (3) is internally filled with coolant. One cooler (5) is installed in each water tank (3). One connecting pipe (7) and one return pipe (71) made of soft material are fixed to one side of each water tank (3). The return pipe (71) is located behind the connecting pipe (7). The outlet end of each return pipe (71) is fixedly connected with the corresponding water tank (3). The inlet end of each connecting pipe (7) extends into the corresponding water tank (3), and the outlet end extends outside the corresponding water tank (3). Each water pump (6) is installed on the inlet end of each connecting pipe (7) and located inside the corresponding water tank (3). The water pump (6) is close to the inner bottom surface of the corresponding water tank (3). The outlet end of each connecting pipe (7) and the inlet end of each return pipe (71) are rotatably provided with a threaded sleeve (8). The lower die (1) and the upper die (2) are each fixedly provided with an n-shaped cooling pipe (9) with two cut ends, which are the inlet end and the outlet end, respectively. The inlet end of the cooling pipe (9) is located in front of the outlet end and is in butt joint with the outlet end of the same transverse connecting pipe (7). The threaded sleeve (8) on the connecting pipe (7) is in threaded connection with the inlet end of the cooling pipe (9). The outlet end of the cooling pipe (9) is in butt joint with the inlet end of the same transverse return pipe (71). The threaded sleeve (8) on the return pipe (71) is in threaded connection with the outlet end of the cooling pipe (9), forming a complete cooling liquid circulation loop. The frame (10), rotating wheel (11), large gear (12), small gear (13) and fan (14) are also included. A plurality of frames (10) are fixed to each cooling pipe (9) and arranged in two rows and two columns. Each rotating wheel (11) is rotatably arranged in each frame (10) and has a large gear (12) fixed to one end thereof and extending outside the frame (10). The edge of each rotating wheel (11) is close to the inner side wall of the corresponding frame (10). A plurality of fans (14) are rotatably arranged on the lower die (1) and the upper die (2) and arranged in a rectangular pattern. The connecting shaft of each fan (14) penetrates into the lower die (1) or the upper die (2) and is fixedly connected with a small gear (13). The number of the small gears (13) is the same as that of the large gears (12), and the small gears (13) and the large gears (12) are in one-to-one correspondence and meshed with each other.

3. The plastic mold with built-in water cooling system according to claim 2, wherein, The protective frame (15) is also included. A plurality of protective frames (15) are arranged in two rows and two columns on the outside of the lower die (1) and the upper die (2). Each protective frame (15) covers the corresponding fan (14).

4. The plastic mold with built-in water cooling system according to claim 3, wherein, The dust screen (16) is also included. The dust screen (16) is fixed to one side of each protective frame (15).

5. A plastic mold with a built-in water cooling system according to claim 4, characterized in that, A layer of sealing glue is coated on the thread protrusions on the inner side wall of each threaded sleeve (8).

6. A plastic mold with a built-in water cooling system according to claim 5, characterized in that, ​

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