Precise injection mold with cooling water channel of fractal structure

Abstract

The utility model discloses a precise injection mold with a fractal structure cooling water path, which comprises a lower mold plate and an upper mold plate, the lower mold plate and the upper mold plate are connected together through a second screw rod, an injection molding pipe is arranged on the upper mold plate, an ejection mechanism is arranged at the bottom of the lower mold plate, a cooling water path cavity is arranged in the lower mold plate, and the cooling water path cavity is communicated with the injection molding pipe. A water inlet and a water outlet are formed in the two ends of the cooling water channel cavity and the lower die plate respectively, the outline shape of the cooling water channel cavity is formed by splicing a plurality of S-shaped structures in order, and an adjusting mechanism capable of changing the width of a water channel is arranged in the cooling water channel cavity. According to the utility model, the fractal structure cooling water channel cavity formed by orderly splicing the plurality of S-shaped structures is arranged, so that the contact area between the cooling water channel and the mold is greatly increased, and meanwhile, a cooling medium fully exchanges heat with the mold in a longer path so as to take away more heat.

Description

Technical Field

[0001] This utility model mainly relates to the field of injection mold technology, specifically a precision injection mold with a fractal structure cooling water channel. Background Technology

[0002] In the field of precision injection molding, the cooling effect of the mold plays a decisive role in the quality and production efficiency of injection molded parts. As the manufacturing industry continues to increase its requirements for the precision, surface quality and production cycle of injection molded parts, the optimization of the cooling system has become the focus of industry attention.

[0003] Traditional precision injection mold cooling water channels mostly adopt simple linear or circulating structures. Although linear channels are simple in structure and easy to manufacture, the contact area between the cooling water channel and the mold is limited, and the flow path of the cooling medium is short. This makes it difficult to fully absorb the heat generated in various parts of the mold, which can easily lead to localized overheating. When injection molding plastic parts with complex shapes and uneven wall thickness, linear channels cannot effectively adjust the heat dissipation requirements of different parts, resulting in serious quality problems such as warping, dimensional deviations, and internal stress concentration in the injection molded parts due to uneven cooling. Although circulating channels improve cooling uniformity to some extent, their structural limitations mean that the increase in the contact area between the cooling medium and the mold is not significant, and the room for improvement in cooling efficiency is limited, making it difficult to meet the needs of high-precision and high-efficiency injection molding production. Utility Model Content

[0004] The purpose of this invention is to address the problem that existing precision injection mold cooling water channels mostly adopt simple linear or circulating structures, which cannot fully absorb the heat generated in various parts of the mold and are prone to local overheating. Therefore, this invention proposes a precision injection mold with a fractal structure cooling water channel.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A precision injection mold with a fractal cooling water channel includes a lower mold plate and an upper mold plate, which are connected together by a second screw. The upper mold plate is provided with an injection tube, and the bottom of the lower mold plate is provided with an ejection mechanism. A cooling water channel cavity is formed inside the lower mold plate. The two ends of the cooling water channel cavity and the lower mold plate are respectively provided with water inlet and water outlet. The outline of the cooling water channel cavity is composed of multiple S-shaped structures arranged in an orderly manner. An adjustment mechanism capable of changing the width of the water channel is provided inside the cooling water channel cavity.

[0007] As a further description of the above technical solution, the adjustment mechanism includes multiple symmetrically arranged U-shaped partitions, with the ends of two symmetrical U-shaped partitions abutting against each other. The cooling water channel cavity has multiple sliding holes connecting adjacent water channels. The ends of the two symmetrical U-shaped partitions are slidably installed in the sliding holes. A round rod is rotatably installed on the inner wall of the cooling water channel cavity. The round rod has two symmetrically arranged threaded grooves on the two symmetrical U-shaped partitions. One end of the round rod passes through the lower template and is fixedly connected to a knob.

[0008] As a further description of the above technical solution, distance sensors are fixedly connected to the two U-shaped partitions of the same water channel in the cooling water channel cavity, and a display screen is provided on the outside of the lower template to cooperate with the two distance sensors.

[0009] As a further description of the above technical solution, the ejection mechanism includes multiple ejector rods, all of which penetrate the lower template and are slidably connected to it. All ejector rods are positioned to avoid the cooling water channel cavity. A base is provided at the lower end of the lower template. Connecting rods are fixedly installed between the lower template and the four corners of the base. A support plate is slidably installed inside the base. The lower ends of the multiple ejector rods are fixedly connected to the support plate. A cylinder is fixedly installed inside the base, and the telescopic end of the cylinder is fixedly connected to the lower end of the support plate.

[0010] As a further description of the above technical solution, the lower template is provided with a plurality of model blocks arranged at equal intervals. A plurality of first screws are inserted into the lower end of the lower template. The lower ends of the plurality of model blocks are provided with threaded holes. The plurality of first screws penetrate the lower template and are threadedly connected to the lower template. The upper ends of the plurality of first screws are respectively threadedly engaged with the plurality of threaded holes.

[0011] As a further description of the above technical solution, a pressure plate is slidably installed inside the upper template, and a lead screw is rotatably installed on the upper end of the pressure plate. The end of the lead screw away from the pressure plate passes through the upper template and is threadedly connected to the upper template. A rocker wheel is fixedly connected to the end of the lead screw away from the pressure plate.

[0012] As a further description of the above technical solution, the pressure plate has a through hole directly below the injection tube, and the lower end of the injection tube extends into the through hole and is slidably connected to the through hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In this invention, the fractal cooling water channel cavity, formed by the orderly splicing of multiple S-shaped structures, greatly expands the contact area between the cooling water channel and the mold. The cooling medium can approach the mold from all directions and at multiple angles, uniformly absorbing heat from all parts of the mold. When injection molding complex-shaped plastic parts with uneven wall thickness, it can precisely adapt to the heat dissipation needs of different areas, effectively avoiding localized overheating of the mold. This results in a uniform temperature distribution during the cooling process of the injection molded part, significantly reducing quality defects such as warping, dimensional deviations, and internal stress concentration caused by uneven cooling. This significantly improves the precision and surface quality of the injection molded part, meeting the stringent quality requirements of high-end manufacturing for precision injection molded parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the cooling water channel cavity of this utility model;

[0017] Figure 3 This is an exploded view of the internal structure of the lower and upper templates of this utility model;

[0018] Figure 4 This is a cross-sectional view of the internal structure of the lower and upper templates of this utility model.

[0019] Reference numerals: 10. Lower template; 101. Cooling water cavity; 102. Inlet; 103. Outlet; 104. Sliding hole; 105. Display screen; 11. Upper template; 111. Injection tube; 12. Base; 121. Connecting rod; 13. Model block; 14. First screw; 15. Second screw; 16. Pressure plate; 161. Through hole; 17. Lead screw; 18. Rocker wheel;

[0020] 20. U-shaped partition; 21. Round rod; 211. Threaded groove; 22. Knob; 23. Distance sensor;

[0021] 30. Push rod; 31. Cylinder; 32. Support plate. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0023] Please refer to the appendix carefully. Figures 1-4As shown, this utility model provides a technical solution: a precision injection mold with a fractal structure cooling water channel, including a lower mold plate 10 and an upper mold plate 11, which are connected together by a second screw 15. The upper mold plate 11 is provided with an injection tube 111, and the bottom of the lower mold plate 10 is provided with an ejection mechanism. A cooling water channel cavity 101 is opened in the lower mold plate 10. The two ends of the cooling water channel cavity 101 and the lower mold plate 10 are respectively provided with water inlet 102 and water outlet 103. The outline of the cooling water channel cavity 101 is composed of multiple S-shaped structures arranged in an orderly manner. An adjustment mechanism that can change the width of the water channel is provided in the cooling water channel cavity 101.

[0024] By setting up a fractal cooling water channel cavity 101 formed by the orderly splicing of multiple S-shaped structures, the contact area between the cooling water channel and the mold is greatly expanded. The S-shaped water channels tightly surround each area, allowing the cooling medium to approach the mold surface from all directions and multiple angles. When injection molding plastic parts with complex shapes and uneven wall thicknesses, it can be precisely adapted according to the heat dissipation requirements of different areas. At the same time, the cooling medium flows in the meandering and long S-shaped cooling water channel cavity 101, which greatly extends the heat exchange path. After the cooling medium flows in from the inlet 102, it needs to pass through multiple S-shaped bends before flowing out from the outlet 103. During this process, the cooling medium and the mold fully exchange heat, which can quickly remove a large amount of heat and accelerate the mold cooling process.

[0025] In one embodiment of this utility model, such as Figure 3 As shown, the adjustment mechanism includes multiple symmetrically arranged U-shaped partitions 20. The two symmetrical U-shaped partitions 20 are staggered and abut against each other at both ends. The cooling water channel cavity 101 is provided with multiple sliding holes 104 connecting adjacent water channels. The two symmetrical U-shaped partitions 20 are slidably installed at both ends in the sliding holes 104. A round rod 21 is rotatably installed on the inner wall of the cooling water channel cavity 101. The round rod 21 has two symmetrically arranged threaded grooves 211 on the two symmetrical U-shaped partitions 20 respectively. One end of the round rod 21 passes through the lower template 10 and is fixedly connected to a knob 22.

[0026] Specifically, by rotating the knob 22, the round rod 21 is driven to rotate. When the round rod 21 rotates, since the round rod 21 has symmetrical threaded grooves 211 on the two symmetrical U-shaped partitions 20, the U-shaped partitions 20 will slide along the sliding hole 104 under the action of threaded transmission, so that the two U-shaped partitions 20 in the sliding hole 104 move away from each other, thereby narrowing the water channel in the cooling water channel cavity 101. Furthermore, for injection molded parts with complex shapes and large differences in heat dissipation requirements, the water channel can be adjusted in different areas of the mold to formulate a special cooling solution.

[0027] In one embodiment of this utility model, such as Figure 1 , Figure 3 and Figure 4 As shown, distance sensors 23 are fixedly connected to two U-shaped baffles 20 in the same water channel within the cooling water channel cavity 101. A display screen 105 is provided on the outer side of the lower template 10 to cooperate with the two distance sensors 23. The distance sensors 23 can directly reflect the change in the width of the water channel through the display screen 105 according to the position change of the two U-shaped baffles 20. The operator can clearly know the current width of the water channel by observing the value displayed on the display screen 105.

[0028] The distance sensor 23 is model Omron E2E-X10ME1, and it is packaged with high temperature resistant and waterproof sealing materials. The electronic components have been specially designed with temperature compensation to adapt to hot water environments.

[0029] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the ejection mechanism includes multiple ejector rods 30, all of which penetrate the lower template 10 and are slidably connected to it. The ejector rods 30 are all positioned to avoid the cooling water channel cavity 101, effectively preventing collisions between the ejector rods 30 and the cooling water channel during ejection, thus preventing damage to the cooling water channel structure and ensuring the normal operation of the cooling system. A base 12 is installed at the lower end of the lower template 10, and connecting rods 121 are fixedly installed between the lower template 10 and the base 12 at each of the four corners. A support plate 32 is slidably installed inside the base 12. The lower ends of multiple ejector rods 30 are fixedly connected to the support plate 32. A cylinder 31 is fixedly installed inside the base 12. The telescopic end of the cylinder 31 is fixedly connected to the lower end of the support plate 32. When the injection molded part cools and forms, the cylinder 31 is activated, and its telescopic end pushes the support plate 32 upward. Since the lower ends of multiple ejector rods 30 are fixedly connected to the support plate 32, the rise of the support plate 32 drives the ejector rods 30 to move upward synchronously, smoothly ejecting the molded part from the mold cavity.

[0030] In one embodiment of this utility model, such as Figure 3 As shown, the lower template 10 has multiple model blocks 13 arranged at equal intervals. Multiple first screws 14 are inserted into the lower end of the lower template 10. The lower ends of the multiple model blocks 13 are provided with threaded holes. The multiple first screws 14 pass through the lower template 10 and are threadedly connected to the lower template 10. The upper ends of the multiple first screws 14 are threadedly engaged with the multiple threaded holes. The model blocks 13 and the lower template 10 are connected by multiple first screws 14, which facilitates the removal and replacement of model blocks 13. When the enterprise needs to produce injection molded parts of different shapes and sizes, it only needs to replace the model blocks 13 of the corresponding specifications.

[0031] In one embodiment of this utility model, such as Figure 4As shown, a pressure plate 16 is slidably installed inside the upper template 11. A screw 17 is rotatably installed on the upper end of the pressure plate 16. The end of the screw 17 away from the pressure plate 16 passes through the upper template 11 and is threadedly connected to the upper template 11. A rocker wheel 18 is fixedly connected to the end of the screw 17 away from the pressure plate 16.

[0032] When the horizontal height of the replaced model block 13 exceeds that of the lower template 10, the rocker wheel 18 is rotated to drive the lead screw 17 to rotate. Since the lead screw 17 is threadedly connected to the upper template 11, under the action of threaded transmission, the lead screw 17 drives the pressure plate 16 to move in the vertical direction, so that the pressure plate 16 can adapt to model blocks 13 of different specifications. This ensures that after the upper template 11 and the lower template 10 are closed, a suitable cavity space is formed inside the mold, allowing the mold to adapt to the use of model blocks 13 of different heights without the need for large-scale modification of the mold.

[0033] In one embodiment of this utility model, such as Figure 4 As shown, the pressure plate 16 has a through hole 161 directly below the injection tube 111. The lower end of the injection tube 111 extends into the through hole 161 and is slidably connected to the through hole 161. Since the pressure plate 16 can move vertically to accommodate model blocks 13 of different heights, the sliding connection between the through hole 161 and the injection tube 111 can ensure that the injection tube 111 can still inject plastic melt into the mold cavity normally when the position of the pressure plate 16 changes.

[0034] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A precision injection mold with a fractal cooling water channel, comprising a lower mold plate (10) and an upper mold plate (11), wherein the lower mold plate (10) and the upper mold plate (11) are connected together by a second screw (15), and the upper mold plate (11) is provided with an injection tube (111), characterized in that, The bottom of the lower template (10) is provided with an ejection mechanism. A cooling water channel cavity (101) is opened inside the lower template (10). The two ends of the cooling water channel cavity (101) and the lower template (10) are respectively provided with water inlet (102) and water outlet (103). The outline of the cooling water channel cavity (101) is composed of multiple S-shaped structures arranged in an orderly manner. An adjustment mechanism that can change the width of the water channel is provided inside the cooling water channel cavity (101).

2. A precision injection mold with a fractal cooling water channel according to claim 1, characterized in that, The adjustment mechanism includes multiple symmetrically arranged U-shaped partitions (20), with the ends of two symmetrical U-shaped partitions (20) interlocking and abutting each other. The cooling water channel cavity (101) has multiple sliding holes (104) connecting adjacent water channels. The ends of the two symmetrical U-shaped partitions (20) are slidably installed in the sliding holes (104). A round rod (21) is rotatably installed on the inner wall of the cooling water channel cavity (101). The round rod (21) has two symmetrically arranged threaded grooves (211) on the two symmetrical U-shaped partitions (20). One end of the round rod (21) passes through the lower template (10) and is fixedly connected to a knob (22).

3. A precision injection mold with a fractal cooling water channel according to claim 1, characterized in that, Distance sensors (23) are fixedly connected to the two U-shaped partitions (20) of the same water channel in the cooling water channel cavity (101), and a display screen (105) is provided on the outside of the lower template (10) to cooperate with the two distance sensors (23).

4. A precision injection mold with a fractal cooling water channel according to claim 1, characterized in that, The ejection mechanism includes multiple ejector rods (30), all of which pass through the lower template (10) and are slidably connected to it. The ejector rods (30) are all positioned to avoid the cooling water channel cavity (101). A base (12) is provided at the lower end of the lower template (10). Connecting rods (121) are fixedly installed between the lower template (10) and the base (12) at the four corners. A support plate (32) is slidably installed inside the base (12). The lower ends of the ejector rods (30) are fixedly connected to the support plate (32). A cylinder (31) is fixedly installed inside the base (12). The telescopic end of the cylinder (31) is fixedly connected to the lower end of the support plate (32).

5. A precision injection mold with a fractal cooling water channel according to claim 1, characterized in that, The lower template (10) contains multiple model blocks (13) arranged at equal intervals. Multiple first screws (14) are inserted into the lower end of the lower template (10). The lower ends of the multiple model blocks (13) are provided with threaded holes. The multiple first screws (14) penetrate the lower template (10) and are threadedly connected to the lower template (10). The upper ends of the multiple first screws (14) are threadedly engaged with the multiple threaded holes respectively.

6. A precision injection mold with a fractal cooling water channel according to claim 1, characterized in that, A pressure plate (16) is slidably installed inside the upper template (11). A screw rod (17) is rotatably installed on the upper end of the pressure plate (16). The end of the screw rod (17) away from the pressure plate (16) passes through the upper template (11) and is threadedly connected to the upper template (11). A rocker wheel (18) is fixedly connected to the end of the screw rod (17) away from the pressure plate (16).

7. A precision injection mold with a fractal cooling water channel according to claim 6, characterized in that, The pressure plate (16) has a through hole (161) directly below the injection tube (111), and the lower end of the injection tube (111) extends into the through hole (161) and is slidably connected to the through hole (161).

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