High-efficiency cooling mechanism for small and medium-sized foaming injection molding machine

Abstract

The utility model belongs to injection molding machine cooling field discloses a circulating water cooling type small and medium -sized foaming injection molding machine high -efficient cooling mechanism, including operation platform and second cooling pipe, operation platform is connected with mounting bracket, bottom die and circulating pump, the mounting bracket is installed with the lower pressure mould, the second cooling pipe inner wall sliding connection piston, the piston is connected with first cooling pipe, first cooling pipe and second cooling pipe are connected with radiating fin respectively, the bottom die inside is equipped with cooling cavity, cooling cavity and first cooling pipe are connected with the liquid return pipe in common, cooling cavity and circulating pump are connected with the liquid outlet pipe in common, circulating pump and first cooling pipe are connected with the connecting pipe in common, the inner diameter of connecting pipe is less than the inner diameter of liquid return pipe. This scheme is driven by hydraulic pressure difference and adjusts the radiating area automatically for second cooling pipe, realizes efficient, self -adaptation, compact circulating cooling, and significantly improves the radiating efficiency and saves the space.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine cooling, and in particular to a high-efficiency cooling mechanism for small and medium-sized foaming injection molding machines with circulating water cooling. Background Technology

[0002] Foaming injection molding machines are key equipment for producing lightweight, shock-absorbing, and heat-insulating foamed plastic products. They inject supercritical fluids (such as CO2 or N2) into molten plastic, causing it to foam and form within a mold cavity. These machines are widely used in industries such as automotive and packaging. Cooling the mold is a crucial step in this process. Its purpose is to remove the heat from the reaction in a timely manner, stabilize the cell structure, and prevent product deformation. This ensures that the product has uniform and fine cells and precise and consistent geometric dimensions, guaranteeing production efficiency and final quality.

[0003] Currently, during the production process of foam injection molding machines, the molten plastic releases a large amount of heat, making rapid and uniform cooling of the mold a significant challenge. Cooling mechanisms in related technologies typically rely on separate external water tanks or natural cooling. Natural cooling is time-consuming, severely slowing down production; while external water tank immersion cooling has some effect, its cooling efficiency still needs improvement, and it requires additional valuable production space, contradicting the needs of small and medium-sized enterprises for compact and integrated equipment. This large-footprint, low-efficiency cooling method undoubtedly significantly reduces production efficiency and increases additional labor and operating costs.

[0004] Therefore, there is an urgent need for a high-efficiency cooling mechanism for small and medium-sized foaming injection molding machines with circulating water cooling to solve the above-mentioned problems. Utility Model Content

[0005] The present invention aims to provide a high-efficiency cooling mechanism for a circulating water-cooled small and medium-sized foaming injection molding machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-efficiency cooling mechanism for a circulating water-cooled small-to-medium-sized foaming injection molding machine includes an operating table and a second cooling pipe. The operating table is connected to a mounting frame, a bottom mold, and a circulating pump. A lower pressure mold is mounted on the mounting frame. A piston is slidably connected to the inner wall of the second cooling pipe. The piston is connected to a first cooling pipe. The first and second cooling pipes are respectively connected to heat dissipation fins. A cooling chamber is provided inside the bottom mold. The cooling chamber and the first cooling pipe are connected together to a return pipe. The cooling chamber and the circulating pump are connected together to an outlet pipe. The circulating pump and the first cooling pipe are connected together to a connecting pipe. The inner diameter of the connecting pipe is smaller than the inner diameter of the return pipe.

[0008] Preferably, the heat dissipation fins have heat dissipation grooves, and the inner wall of the heat dissipation grooves is connected to a plurality of heat exchange rods.

[0009] Preferably, the piston is connected to two guide rods, and the two guide rods are slidably connected to the second cooling pipe.

[0010] Preferably, the guide rod is connected to an anti-detachment ring.

[0011] Preferably, the piston and the inner wall of the second cooling pipe are both connected to a spring.

[0012] Preferably, the second cooling pipe is connected to a cooling fan.

[0013] Preferably, the first cooling pipe and the operating table are connected by a support rod.

[0014] Preferably, the operating table is connected to table legs.

[0015] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0016] (1) A highly integrated closed-loop cooling system is constructed by means of a circulating pump, connecting pipes, cooling chamber, return pipe, and first and second cooling pipes, realizing forced circulation and continuous heat exchange of coolant, replacing the traditional bulky external water tank. The dual cooling pipe design and piston structure can automatically adjust the internal volume of the system by utilizing changes in liquid pressure, buffering pressure fluctuations caused by thermal expansion and contraction, and ensuring stable and efficient cooling circulation. At the same time, the design of the inner diameter of the connecting pipe being smaller than that of the return pipe prioritizes the flow rate and pressure of liquid supplied to the mold cooling chamber, thereby quickly and evenly removing a large amount of heat from the mold, significantly improving cooling efficiency and production efficiency, and is particularly suitable for small and medium-sized enterprises with limited space.

[0017] (2) The heat dissipation fins are opened with heat dissipation grooves and heat exchange rods, which greatly increases the specific surface area of ​​the heat dissipation area, breaks the boundary layer of the air flow field, enhances the turbulence effect, thereby improving the heat exchange efficiency between the heat dissipation fins and the surrounding air, accelerating the heat loss rate of the coolant, and providing strong cooling capacity for the entire system.

[0018] (3) By setting two guide rods that are slidably connected to the second cooling pipe, the piston movement is provided with precise guidance and limit, which effectively prevents the piston from deflecting or jamming during the movement, ensuring the smoothness and reliability of the piston reciprocating motion, and thus ensuring the stable operation of the system pressure self-regulation function.

[0019] (4) A spring is installed between the piston and the inner wall of the second cooling pipe. The preload of the spring provides a restoring force to the piston. This design can actively assist the piston to reset after hydraulic pressure changes, making the system respond more quickly and sensitively to pressure and flow changes, and further enhancing the system's ability to buffer pressure pulsation and adaptive adjustment.

[0020] (5) A cooling fan is installed at the second cooling pipe, which can actively generate forced airflow to directly and efficiently blow the heat dissipation fins, greatly enhancing the air convection heat transfer effect. Especially when the ambient temperature is high or the cooling load is large, it can effectively prevent heat accumulation and significantly improve the ultimate heat dissipation capacity and cooling speed of the entire system. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 A schematic diagram of the piston's three-dimensional structure provided by this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the first cooling pipe provided by this utility model;

[0024] Figure 4 Provided by this utility model Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 A three-dimensional structural diagram of the cooling cavity provided by this utility model;

[0026] Reference numerals: 1. Operating table; 2. Mounting bracket; 3. Bottom mold; 4. Lower pressing mold; 5. Circulating pump; 6. Liquid outlet pipe; 7. Liquid return pipe; 8. Connecting pipe; 9. First cooling pipe; 10. Second cooling pipe; 11. Heat dissipation fins; 12. Piston; 13. Spring; 14. Guide rod; 15. Anti-detachment ring; 16. Support rod; 17. Heat dissipation groove; 18. Heat exchange rod; 19. Cooling chamber; 20. Table leg; 21. Cooling fan. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0028] like Figures 1 to 5 The diagram illustrates a high-efficiency cooling mechanism for a small-to-medium-sized foam injection molding machine, featuring a circulating water-cooled system. This mechanism includes an operating table 1 and a second cooling pipe 10. Through a highly integrated forced circulation system, it rapidly removes heat from the mold, solving the problems of low efficiency and large footprint associated with traditional cooling methods. Figure 1As shown, a mounting bracket 2 is connected to the left side of the operating table 1. A bottom mold 3 for molding products is installed opposite the operating table 1 and the mounting bracket 2. A circulation pump 5, which provides circulation power, is connected to the right side of the operating table 1. A lower pressing mold 4 is installed on the mounting bracket 2. Figure 3 As shown, a piston 12, which buffers system pressure fluctuations, is slidably connected to the inner wall of the second cooling pipe 10. The bottom of the piston 12 is connected to a first cooling pipe 9. The first cooling pipe 9 and the second cooling pipe 10 are respectively connected to heat dissipation fins 11 for enhanced heat dissipation. Driven by the circulating pump 5, the coolant flows through the cooling chamber 19 inside the mold and carries away heat. Because the inner diameter of the connecting pipe 8 is smaller than the inner diameter of the return pipe 7, a pressure difference is created between the inlet and outlet, causing the coolant to gradually accumulate in the first cooling pipe 9 and the second cooling pipe 10, generating hydraulic pressure. Figure 5 As shown, the bottom mold 3 has a cooling chamber 19 inside. The cooling chamber 19 and the first cooling pipe 9 are connected to a return pipe 7. The cooling chamber 19 and the circulating pump 5 are connected to an outlet pipe 6. The circulating pump 5 and the first cooling pipe 9 are connected to a connecting pipe 8. The hydraulic pressure will push the second cooling pipe 10, which is slidably connected to the piston 12, upward, causing the entire heat dissipation structure to expand in the height direction, thereby automatically obtaining a larger heat dissipation space and effective heat dissipation area, enhancing the system's adaptive heat dissipation capability. This ensures efficient cooling; the first cooling pipe 9, the second cooling pipe 10, and the heat dissipation fins 11 are all made of materials with high thermal conductivity to improve heat exchange efficiency.

[0029] like Figure 4 As shown, the heat dissipation fins 11 have heat dissipation grooves 17, and several heat exchange rods 18 are connected to the outer side of the inner wall of the heat dissipation grooves 17 to increase the heat exchange area and enhance the turbulence.

[0030] like Figure 2 and Figure 3 As shown, the bottom of the piston 12 is connected to two guide rods 14 that provide precise guidance for its movement, and the two guide rods 14 are slidably connected to the second cooling pipe 10.

[0031] like Figure 2 and Figure 3 As shown, the bottom of the guide rod 14 is connected to an anti-detachment ring 15 to prevent the component from detaching.

[0032] like Figure 2 As shown, the piston 12 and the inner wall of the second cooling pipe 10 are connected to a spring 13 that assists in piston reset. The preload of the spring 13 provides a restoring force to the piston. This design can actively assist the piston in resetting after hydraulic pressure changes, making the system respond more quickly and sensitively to pressure and flow changes, and further enhancing the system's ability to buffer pressure pulsations and adaptively adjust.

[0033] like Figure 1As shown, the top of the second cooling pipe 10 is connected to a cooling fan 21 that actively generates airflow to enhance heat exchange. It can actively generate forced airflow to directly and efficiently blow on the heat dissipation fins 11, which greatly enhances the air convection heat exchange effect. Especially when the ambient temperature is high or the cooling load is large, it can effectively prevent heat accumulation and significantly improve the ultimate heat dissipation capacity and cooling speed of the entire system.

[0034] like Figure 3 As shown, the first cooling pipe 9 and the operating table 1 are connected together by several support rods 16 that provide support and stability.

[0035] like Figure 1 As shown, the bottom of the workbench 1 is connected to several table legs 20.

[0036] The specific implementation process is as follows:

[0037] After the circulating pump 5 starts, it drives the coolant through the connecting pipe 8 into the cooling chamber 19 inside the bottom mold 3 to absorb the large amount of heat generated during the mold forming process. The heated coolant flows back to the cooling system through the return pipe 7. Since the inner diameter of the connecting pipe 8 is designed to be smaller than the inner diameter of the return pipe 7, a hydraulic pressure difference is formed, causing the coolant to continuously accumulate in the first cooling pipe 9 and the second cooling pipe 10 and generate a gradually increasing hydraulic pressure. This pressure pushes the second cooling pipe 10, which is slidably connected to the piston 12, to move upward. The piston 12, through the guide rod 14, drives the second cooling pipe 10, which is slidably connected to it, to extend upward synchronously, so that the entire heat dissipation structure expands in the vertical direction, thereby automatically increasing the exposed area and heat dissipation space of the heat dissipation fins 11. During this process, the cooling fan 21 starts, providing forced air cooling to the heat dissipation grooves 17 and heat exchange rods 18 on the surface of the heat dissipation fins 11, greatly enhancing the heat exchange efficiency. When the system pressure decreases, the spring 13 pushes the piston 12 to reset, causing the second cooling pipe 10 to descend and return to its original position. Throughout the process, the support rod 16 provides stable support for the first cooling pipe 9, and the table legs 20 ensure that the operating table 1 is stable and well ventilated at the bottom, thereby achieving efficient, adaptive, and compact circulating cooling operation.

[0038] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine, characterized in that: The system includes an operating table (1) and a second cooling pipe (10). The operating table (1) is connected to a mounting frame (2), a bottom mold (3), and a circulating pump (5). The mounting frame (2) is equipped with a lower pressing mold (4). A piston (12) is slidably connected to the inner wall of the second cooling pipe (10). The piston (12) is connected to a first cooling pipe (9). The first cooling pipe (9) and the second cooling pipe (10) are respectively connected to heat dissipation fins (11). The bottom mold (3) has a cooling chamber (19) inside. The cooling chamber (19) and the first cooling pipe (9) are connected together to a return pipe (7). The cooling chamber (19) and the circulating pump (5) are connected together to an outlet pipe (6). The circulating pump (5) and the first cooling pipe (9) are connected together to a connecting pipe (8). The inner diameter of the connecting pipe (8) is smaller than the inner diameter of the return pipe (7).

2. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 1, characterized in that: The heat dissipation fins (11) have heat dissipation grooves (17), and the inner wall of the heat dissipation grooves (17) is connected to several heat exchange rods (18).

3. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 1, characterized in that: The piston (12) is connected to a guide rod (14), and there are two guide rods (14). The two guide rods (14) are slidably connected to the second cooling pipe (10).

4. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 3, characterized in that: The guide rod (14) is connected to an anti-detachment ring (15).

5. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 1, characterized in that: The piston (12) and the inner wall of the second cooling pipe (10) are connected together by a spring (13).

6. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 1, characterized in that: The second cooling pipe (10) is connected to a cooling fan (21).

7. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 1, characterized in that: The first cooling pipe (9) and the operating table (1) are connected together by a support rod (16).

8. The high-efficiency cooling mechanism for a circulating water-cooled medium and small foaming injection molding machine as described in claim 1, characterized in that: The operating table (1) is connected to table legs (20).

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