A bionic composite manufacturing method of a mold

Abstract

The application discloses a kind of mould's bionic composite manufacturing method, comprising the following steps: step S100, respectively manufacturing open box, closing plate, thin-walled cavity, exhaust guide and follow-up runner;Step S200, exhaust guide and follow-up runner are assembled into combination;Step S300, open box is assembled to mould frame bottom plate, combination is moved into open box, so that the entrance and exit of follow-up runner are respectively sealed and connected with the runner entrance and exit of open box bottom plate respectively;The bottom of exhaust guide is higher than the bottom of open box or is connected with the air hole on the bottom plate of open box;When the bottom of exhaust guide is higher than the bottom of open box, step S400 is executed;When the bottom of exhaust guide is connected with the air hole on the bottom plate of open box, step S500 is executed;Step S400, lay air-permeable layer;Step S500, install thin-walled cavity;Step S600, lay heat-conducting layer;Step S700, install closing plate.The application reduces production cost and improves production efficiency.

Description

Technical Field

[0001] This invention relates to the field of mold manufacturing, and in particular to a biomimetic composite manufacturing method for molds. Background Technology

[0002] Modern injection molds are high-performance mechanical products characterized by precise and complex cavities, fine surface textures and micro-venting holes, internal hot and cold circulation channels, and pressure-resistant integral structures. To achieve diverse composite performance requirements, processes such as sand casting, CNC rough machining, cavity fine carving, hand-texturing, EDM drilling, and runner plate fitting are generally required. This process is not only time-consuming, with low efficiency in texture and venting hole processing and high pollution, but also results in problems such as low heat exchange efficiency, slow production cycle, and high energy consumption during the hot and cold circulation process of injection molding due to the inability of the plate-type runner plate to cool the complex cavity accordingly.

[0003] To shorten the manufacturing cycle of injection molds, some public reports have mentioned the use of precision casting to replace traditional sand casting, thereby eliminating CNC rough machining, cavity engraving, and manual texturing processes. However, it still cannot escape the reliance on EDM (Electrical Discharge Machining) for hole opening, and due to the inherent limitations of the casting process, its ability to produce high-resolution 3D textures and characters is significantly inferior to that of precision engraving. Considering the complex manufacturing process and high cost of precision casting sand molds, its overall improvement over traditional mold manufacturing processes is limited.

[0004] Furthermore, with the development and maturation of metal 3D printing technology, there are public reports of using laser powder bed forming (LPBF) equipment and metal powder additive manufacturing processes. Leveraging its 2D layer-by-layer spatial structure advantages, it can complete the composite forming of precise and complex cavities, fine surface textures and micro-venting pores, internal hot and cold circulation channels, and pressure-resistant integral structures in a single step. This greatly simplifies the production process of injection molds and enables one-stop rapid production of core components. However, the high-power laser scanning system of current metal laser powder bed forming equipment is expensive, and the laser single-point vector scanning forming speed is still relatively slow for large-volume injection molds, resulting in insufficient unit input capacity. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a biomimetic composite manufacturing method for molds, which has the advantages of reducing production costs and improving production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A biomimetic composite manufacturing method for a mold includes the following steps:

[0008] Step S100, Component manufacturing: Manufacturing the open box body, sealing plate, thin-walled cavity, exhaust outlet and accompanying flow channel respectively;

[0009] Step S200, Assembly of the assembly: Assemble the exhaust outlet and the accompanying flow channel into an assembly;

[0010] Step S300, Assembly Installation: Assemble the open box body onto the mold frame base plate, move the assembly body into the open box body, so that the inlet and outlet of the accompanying flow channel are respectively sealed and connected to the inlet and outlet of the flow channel on the bottom plate of the open box body; the bottom of the exhaust outlet component is higher than the bottom plate of the open box body or connected to the vent hole on the bottom plate of the open box body; when the bottom of the exhaust outlet component is higher than the bottom plate of the open box body, proceed to step S400; when the bottom of the exhaust outlet component is connected to the vent hole on the bottom plate of the open box body, proceed to step S500.

[0011] Step S400, Laying a breathable layer: Laying a breathable layer inside the open box to cover the lower exhaust port of the exhaust outlet component;

[0012] Step S500, Install thin-walled cavity: Lay a heat-conducting layer until only the upper end of the exhaust outlet is exposed, place the thin-walled cavity on the exhaust outlet and connect the micro exhaust hole group of the thin-walled cavity with the upper air inlet of the exhaust outlet.

[0013] Step S600, Laying the thermal conductive layer: Continue laying the thermal conductive layer;

[0014] Step S700: Install the sealing plate.

[0015] By adopting the above technical solution, the mold is divided into multiple functional components, including an open box, a sealing plate, a thin-walled cavity, an exhaust outlet, and a following flow channel. These functional components can be manufactured using appropriate processing methods according to the actual structural complexity and functional requirements, reducing processing costs. Multiple functional components can be processed simultaneously and in batches, greatly improving the production efficiency of the mold. In addition, the overall assembly is simple. Furthermore, the combination of the exhaust outlet and the following flow channel can achieve the exhaust and heat dissipation functions required by the mold itself, while also providing support. In addition, by filling with a breathable layer and a heat-conducting layer, the exhaust and heat dissipation functions are enhanced, and the support rigidity is further improved.

[0016] Optionally, in step S100, the sealing plate and the opening box are both manufactured by CNC subtractive machining; the thin-walled cavity and the exhaust outlet are both manufactured by metal LPBF additive machining; and the accompanying flow channel is manufactured by CNC bending of copper tubes.

[0017] By adopting the above technical solutions, the thin-walled cavity has a complex curved surface, and the exhaust outlet has a complex exhaust channel inside. 3D printing is more suitable for manufacturing both the thin-walled cavity and the exhaust outlet. The sealing plate and the open box itself mainly serve the function of supporting and sealing, so the requirements for dimensional accuracy are not relatively high. Therefore, they are processed by CNC subtractive machining. The accompanying flow channel focuses on matching the shape of the thin-walled cavity. Compared with dimensional accuracy, heat exchange efficiency is more important. Therefore, copper tube CNC bending is used to form the accompanying flow channel, which is more in line with actual work. All the above functional components are processed in the most suitable way to meet different priorities, which saves processing costs and improves production efficiency.

[0018] Optionally, in step S200, before assembling the exhaust outlet and the accompanying flow channel into a combination, a quick clamp is used to fix the accompanying flow channel and adjust its posture to be horizontal and upright; in step S300, before connecting the accompanying flow channel and the opening box, the quick clamp is removed.

[0019] By adopting the above technical solution and using quick clamps to fix the accompanying flow channel, the position of the accompanying flow channel is more accurate and stable, which is conducive to the subsequent assembly with the exhaust outlet component into a combined component, thereby improving the convenience and positional accuracy of the subsequent assembly with the open box.

[0020] Optionally, the exhaust outlet includes a plurality of tree-shaped bionic bones; the tree-shaped bionic bones are provided with a breathable structure; the breathable structure forms an upper air inlet and a lower exhaust outlet; the upper air inlet is located at the end of the branches of the tree-shaped bionic bone; the lower exhaust outlet is located at the root of the trunk of the tree-shaped bionic bone.

[0021] By adopting the above technical solution, the exhaust outlet component is divided into multiple tree-shaped bionic bones. In this way, breathable and heat-conducting layers can be filled between the multiple tree-shaped bionic bones, thereby improving the overall exhaust efficiency and heat dissipation efficiency.

[0022] Optionally, the lower exhaust port is a circumferential exhaust hole.

[0023] By adopting the above technical solution, the lower exhaust port is a circumferential exhaust hole. In this way, the air discharged from the tree-shaped bionic bone is not directly discharged through the vent at the bottom of the open box, but is discharged into the breathable layer and then discharged through the vent at the bottom of the open box, which improves the smoothness of exhaust.

[0024] Optionally, the breathable layer includes breathable particles, which need to be compacted during the laying process or an adhesive needs to be filled between the breathable particles.

[0025] By adopting the above technical solutions, either compacting the breathable particles or filling the spaces between the breathable particles with an adhesive can improve the supporting rigidity of the breathable layer and increase the efficiency of breathability.

[0026] Optionally, the thermally conductive layer includes thermally conductive particles, which need to be compacted during the laying of the thermally conductive particles in step S600.

[0027] By adopting the above technical solution, the vibration-compacted thermal conductive particles can improve the supporting rigidity of the thermal conductive layer and also improve the efficiency of thermal conduction.

[0028] Optionally, step S800 is also included: injecting liquid additive: injecting liquid additive into the heat-conducting layer through the injection port on the sealing plate to fill the pores of the heat-conducting layer until the overflow port on the sealing plate discharges bubble-free liquid additive, and then sealing the injection port and the overflow port.

[0029] By adopting the above technical solution, injecting liquid additives into the heat-conducting layer can improve the heat transfer performance of the heat-conducting layer, enhance the pressure resistance of the heat-conducting layer, and increase the supporting stiffness of the thin-walled cavity.

[0030] Optionally, in step S400, after the breathable layer is laid, a blocking layer is sprayed onto its upper surface.

[0031] By adopting the above technical solution, the blocking layer prevents liquid additives from leaking into the breathable layer, thus ensuring the porosity and exhaust effect of the breathable layer.

[0032] Optionally, in step S300, a filter element is installed in the vent at the bottom of the open box before the assembly is moved into the open box.

[0033] By adopting the above technical solution, a filter element is installed in the vent hole of the open box, which can ensure exhaust while preventing air particles from flowing out of the open box. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a partially cut-out section of the mold of the present invention.

[0035] Figure 2 This is a schematic flowchart of the manufacturing method of the present invention.

[0036] Figure 3 This is a schematic diagram of the structure of each functional component after step S100 of the present invention is completed.

[0037] Figure 4 This is a schematic diagram of the structure after step S200 of the present invention is completed.

[0038] Figure 5 This is a structural diagram after step S300 of the present invention is completed.

[0039] Figure 6 This is a schematic diagram of the structure after step S400 of the present invention is completed.

[0040] Figure 7This is a schematic diagram of the structure after step S500 of the present invention is completed.

[0041] Figure 8 This is a schematic diagram of the structure after step S600 of the present invention is completed.

[0042] Figure 9 This is a structural diagram after step S700 of the present invention is completed.

[0043] Figure 10 This is a structural diagram of step S800 of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Mold frame base plate;

[0046] 20. Open housing; 200. First threaded hole; 201. Vent hole; 202. Flow channel inlet; 203. Flow channel outlet; 21. Outer flange;

[0047] 30. Following flow channel; 300. Quick clamp;

[0048] 40. Tree-shaped biomimetic skeleton; 41. Root of the skeleton; 42. Ends of the skeleton branches;

[0049] 50. Breathable layer;

[0050] 60. Blocking layer;

[0051] 70. Thermal conductive layer;

[0052] 80. Thin-walled cavity; 800. Micro-venting port group; 81. Inner flange;

[0053] 90. Sealing plate; 900. Top opening; 901. Filling port; 902. Overflow port; 903. Second connecting hole; 904. First connecting hole. Detailed Implementation

[0054] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail below.

[0055] Example 1: A biomimetic composite mold is disclosed, with reference to... Figure 1 and Figure 3The mold is fixed to the mold frame base plate 10 by bolts; the mold includes an open box 20, a sealing plate 90, a thin-walled cavity 80, an exhaust outlet and a traveling channel 30; the open box 20 is a rectangular shell with an open top and its bottom periphery extends outward to form an outer flange 21; the outer flange 21 of the open box 20 is fixed to the mold frame base plate 10 by bolts; the bottom plate of the open box 20 has a traveling channel outlet 203, a traveling channel inlet 202 and a vent hole 201 formed therein, and a filter element is installed in the vent hole 201 of the thin-walled cavity 80; the traveling channel outlet 203, the traveling channel inlet 202 and the vent hole 201 are sealed and connected to the corresponding pipe interfaces of the mold frame base plate 10 one by one; the exhaust outlet, the traveling channel 30 and the thin-walled cavity 80 are located inside the open box 20; the sealing plate 90 is used to close the part of the upper opening of the open box 20 located outside the thin-walled cavity 80.

[0056] refer to Figure 1 and Figure 3 The exhaust outlet includes four tree-shaped bionic bones 40. The number of tree-shaped bionic bones 40 is not limited to four and can be set according to actual space and needs. The bottom of the accompanying flow channel 30 is fixed to the bottom plate of the open box 20, and the fixing method can be plug-in. The outlet and inlet of the accompanying flow channel 30 are respectively sealed to the flow channel outlet 203 and flow channel inlet 202 of the bottom plate of the open box 20. The middle of the four tree-shaped bionic bones 40 is interlaced and fixed on the accompanying flow channel 30. The specific connection method can be to set a hanging part on the tree-shaped bionic bones 40, and the tree-shaped bionic bones 40 are hung on the accompanying flow channel 30 through the hanging part. To improve stability, adhesive can be filled at the hanging position to complete the connection. The interior of the tree-shaped bionic bones 40 has a breathable structure, which can be a sponge-like, fiber bundle, or other bionic breathable structure. The breathable structure forms an upper air inlet and a lower exhaust outlet. The upper air inlet is located at the tree... The tree-shaped bionic bone 40 has four branch ends 42; the lower exhaust port is located at the root 41 of the trunk of the tree-shaped bionic bone 40; the thin-walled cavity 80 is placed on the branch ends 42 of the four tree-shaped bionic bones 40, and the branch ends 42 of the four tree-shaped bionic bones 40 form a curved surface that matches the shape of the outer surface of the thin-walled cavity 80, while the micro exhaust hole group 800 of the thin-walled cavity 80 is connected to the upper air inlet; the open box 20 has a breathable layer 50 and a blocking layer 6 from bottom to top. The heat-conducting layer 70, the breathable layer 50, the blocking layer 60 and the heat-conducting layer 70 are filler layers; the accompanying flow channel 30 includes a main body and an inlet pipe and an outlet pipe connected to the main body; the coolant passes through the inlet pipe, the main body and the outlet pipe in sequence; the main body of the accompanying flow channel 30 is located inside the heat-conducting layer 70; the sealing plate 90 is fixed to the top of the open box 20 by bolts and connected to the top of the thin-walled cavity 80 by bolts; the sealing plate 90 has a filling port 901 and an overflow port 902.

[0057] refer to Figure 1 and Figure 3The sealing plate 90 has an upper opening 900 formed at its center, which matches the upper opening of the thin-walled cavity 80. Several first connecting holes 904 are formed on the edge of the sealing plate 90, and several second connecting holes 903 are formed on the edge of the upper opening 900. Several first threaded holes 200 are formed on the top surface of the opening box 20, which mate with the first connecting holes 904 one by one. An inner flange 81 extends outward from the upper edge of the thin-walled cavity 80. The presence of the inner flange 81 not only facilitates subsequent connection, but also increases the contact area between the sealing plate 90 and the thin-walled cavity 80, thereby improving the sealing performance. The edge of the sealing plate 90 is bolted to the side wall of the opening box 20, and the center is fitted and bolted to the inner flange 81 of the thin-walled cavity 80, thereby completely sealing the filling material inside the opening box 20.

[0058] In this embodiment, the lower exhaust port is a circumferential exhaust hole. Air discharged from the thin-walled cavity 80 enters the breathable layer 50 through the circumferential exhaust hole and then exits through the vent holes 201 on the bottom plate of the open box 20. In other embodiments, the lower exhaust port is located at the bottom of the root 41 of the tree-shaped bionic bone 40. The bottom of the root 41 of the tree-shaped bionic bone 40 is connected one-to-one with the vent holes 201 on the bottom plate of the open box 20. Specifically, the connection can be made by insertion, i.e., the bottom of the root 41 of the tree-shaped bionic bone 40 is inserted into... The air discharged from the thin-walled cavity 80 is directly discharged through the air vent 201 on the bottom plate of the open box 20. Accordingly, the open box 20 only needs to be filled with the heat-conducting layer 70, without the need to lay the air-conducting layer 50. This simplifies the assembly steps of the mold and reduces the difficulty of recycling the open box 20 and the heat-conducting filler. However, it will lead to more heat exchange between the accompanying flow channel 30 and the open box 20 and the mold frame bottom plate 10. Therefore, heat insulation measures are taken between the open box 20 and the mold frame bottom plate 10.

[0059] In other embodiments, the exhaust outlet can be divided into multiple exhaust outlet components. The exhaust outlet components can be non-tree-shaped, but the exhaust outlet components have a breathable structure inside, an upper air inlet at the top, and a lower exhaust outlet at the bottom. At the same time, the exhaust outlet components are also provided with a hanging part.

[0060] The breathable layer 50 includes breathable particles, which can be low-cost, pressure-resistant mineral particles with appropriate porosity, such as quartz sand, corundum sand, and recycled glass sand.

[0061] The thermally conductive layer 70 includes thermally conductive particles, which can be low-thermal-resistance inorganic crystal particles, such as corundum sand, or low-thermal-resistance metal particles, such as copper and aluminum. To increase thermal conductivity, a liquid additive is injected between the thermally conductive particles to improve the heat transfer performance of the thermally conductive layer 70, enhance its pressure resistance, and increase its support stiffness for the thin-walled cavity 80. The liquid additive can be a low-melting-point alloy, a high-boiling-point coolant, etc.; it can also be a room-temperature curing or thermosetting epoxy resin, silicone grease, etc., to provide higher support stiffness. Correspondingly, mold disassembly and standard part recycling require the removal of the solidified liquid additive through auxiliary means such as heating and dissolving.

[0062] The blocking layer 60 can be made of Teflon, light-cured, or thermosetting resin coating with good sealing performance to prevent liquid additives from leaking into the breathable layer 50, thus ensuring the porosity and exhaust effect of the breathable layer 50.

[0063] During the design process, based on the length, width, and height dimensions of the injection mold digital model, after adapting it to the standard box body and adjusting it into a digital model, the digital model is shelled to obtain the cavity digital model of the standard box body shape. According to the mechanical flange connection design principles, the cavity digital model is split to obtain the sealing plate digital model, the open box body digital model, the thin-walled cavity digital model, and the fastening bolt digital model. The thin-walled cavity digital model is edited, and micro-venting hole groups are added according to the injection molding requirements to complete the thin-walled cavity digital model for additive manufacturing. Furthermore, starting from the outer wall of the micro-venting hole group, a biomimetic tree topology algorithm and a biomimetic permeable filling algorithm are used to generate a tree-shaped biomimetic bone digital model for additive manufacturing, extending towards the side wall and bottom plate of the open box body digital model. The ends of each bone branch are connected to the micro-venting hole group. Once connected, the root 41 of each backbone fits into the side wall and bottom plate of the open box, thereby supporting and positioning the thin-walled cavity; and the micro-venting hole group connects and converges to the circumferential venting holes of the backbone root 41 in the bottom plate area of ​​the open box through the internal air-permeable tissue of the tree-shaped bionic bone; edit the bottom plate of the open box model, add the flow channel inlet 202, flow channel outlet 203 and air vent 201 to complete the open box model for CNC manufacturing; from the flow channel inlet 202 to the flow channel outlet 203 according to the trend of the outer wall of the thin-walled cavity model, lay the conformal flow channel model to the flow channel outlet 203 to cover the outside of the thin-walled cavity model, and edit and add the middle support and improve the tree-shaped bionic bone model at the place where it passes the adjacent tree-shaped bionic bone model.

[0064] Example 2: A biomimetic composite manufacturing method for the above-mentioned mold is disclosed, taking the case where the exhaust outlet is composed of four tree-shaped biomimetic bones 40 and the bottom of the root 41 of the tree-shaped biomimetic bones 40 is separated from the vent hole 201 on the bottom plate of the open box 20 as an example, referring to... Figures 2-10 Specifically, it includes the following steps:

[0065] Step S100, Component Manufacturing: Reference Figure 3The following components are manufactured: open box 20, sealing plate 90, thin-walled cavity 80, four tree-shaped bionic bones 40 and accompanying flow channel 30.

[0066] The manufacturing methods of each functional component are as follows: the sealing plate 90 and the opening box 20 are both made by CNC subtractive processing; the thin-walled cavity 80 and the tree-shaped bionic bone 40 are both made by metal LPBF additive processing; the accompanying flow channel 30 is made by CNC bending of copper tubes.

[0067] Step S200, Assembly of the assembly: Refer to Figure 4 The four tree-shaped bionic bones 40 and the accompanying flow channel 30 are assembled into a combined unit. Specifically, the following steps are taken: First, the accompanying flow channel 30 is fixed with a quick clamp 300 and its posture is adjusted to be horizontal and upright. The four tree-shaped bionic bones 40 are connected and assembled onto the accompanying flow channel 30 in sequence. The quick clamp 300 can be a support base with clamps, which can be placed stably on a flat surface. Then, the inlet and outlet ends of the tree-shaped bionic bones 40 are clamped by the clamps, so that the position of the entire accompanying flow channel 30 is accurate and stable.

[0068] Step S300, Assembly Installation: Refer to Figure 5 Assemble the open box 20 onto the mold frame base plate 10, move the assembly into the open box 20, remove the quick clamp 300, so that the inlet and outlet of the accompanying flow channel 30 are respectively sealed and connected to the inlet and outlet of the flow channel on the base plate of the open box 20; in order to prevent the particles in the subsequent permeable layer 50 from flowing out from the permeable holes 201 on the base plate of the open box 20, filter elements need to be installed one by one in the permeable holes 201 on the base plate of the open box 20 in this step.

[0069] Step S400, Lay the breathable layer 50: Reference Figure 6 A breathable layer 50 is laid inside the open box 20 to cover the lower exhaust port of the tree-shaped bionic bone 40. In order to improve its supporting rigidity, the breathable layer 50 needs to be compacted during the laying process. The specific compaction method is to use a vibration device to give the open box 20 and the mold frame base plate 10 a certain amount of vibration, or to inject an adhesive between the breathable particles without vibration. This makes the supporting rigidity of the breathable layer 50 stronger, but the subsequent recycling and reuse of breathable particles requires the addition of a crushing and screening process.

[0070] Step S500, Install thin-walled cavity 80: Reference Figure 7 A heat-conducting layer 70 is laid on the breathable layer 50 until only the upper ends of the four tree-shaped bionic bones 40 are exposed. The thin-walled cavity 80 is placed between the ends 42 of the branches of the four tree-shaped bionic bones 40, and the micro-venting holes 800 of the thin-walled cavity 80 are connected to the upper air inlets of the four tree-shaped bionic bones 40 one by one.

[0071] Step S600, Laying the thermally conductive layer 70: Reference Figure 8 Continue laying the heat-conducting layer 70 until it is flush with the upper surface of the open box 20; during this process, it needs to be compacted. The specific method of compaction is to use a vibration device to give the open box 20 and the mold frame base plate 10 a certain amount of vibration.

[0072] Step S700, Install sealing plate 90: Reference Figure 9 Install the sealing plate 90 at the upper opening of the opening box 20; specifically, connect the edge of the sealing plate 90 to the opening box 20 with bolts, and connect the center of the sealing plate 90 to the thin-walled cavity 80 with bolts.

[0073] To further improve the heat transfer performance of the heat-conducting layer 70 and enhance its compressive strength, i.e., its surface support stiffness for the thin-walled cavity 80, reference is made. Figure 2 and Figure 10 Following step S700, there is a further step S800: injecting liquid additive. Specifically, this involves injecting liquid additive into the heat-conducting layer 70 through the injection port 901 on the sealing plate 90 to fill the pores of the heat-conducting layer 70 until bubble-free liquid additive is discharged from the overflow port 902 on the sealing plate 90. Then, the injection port 901 and overflow port 902 are sealed with a plug. To prevent the injected liquid additive from leaking into the breathable layer 50 and to ensure the porosity and venting effect of the breathable layer 50, in step S400, after the breathable layer 50 is laid, a blocking layer 60 is sprayed onto its upper surface.

[0074] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A biomimetic composite manufacturing method for a mold, characterized in that: Includes the following steps: Step S100, component manufacturing: manufacture the open box body (20), sealing plate (90), thin-walled cavity (80), exhaust outlet and accompanying flow channel (30) respectively. Step S200, Assembly of the assembly: Assemble the exhaust outlet and the accompanying flow channel (30) into an assembly; Step S300, Assembly installation: Assemble the open box (20) onto the mold frame base plate (10), move the assembly into the open box (20), so that the inlet and outlet of the accompanying flow channel (30) are respectively sealed and connected to the inlet and outlet of the flow channel on the base plate of the open box (20); the bottom of the exhaust outlet is higher than the base plate of the open box (20) or connected to the vent hole (201) on the base plate of the open box (20); when the bottom of the exhaust outlet is higher than the base plate of the open box (20), execute step S400; when the bottom of the exhaust outlet is connected to the vent hole (201) on the base plate of the open box (20), execute step S500. Step S400, laying a breathable layer (50): laying a breathable layer (50) inside the open box (20) to cover the lower exhaust port of the exhaust outlet; Step S500, install thin-walled cavity (80): lay heat-conducting layer (70) until only the upper end of the exhaust outlet is exposed, place thin-walled cavity (80) on exhaust outlet and the micro exhaust hole group (800) of thin-walled cavity (80) is connected to the upper air inlet of exhaust outlet; Step S600, Laying the thermal conductive layer (70): Continue laying the thermal conductive layer (70). Step S700: Install the sealing plate (90).

2. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: In step S100, the sealing plate (90) and the opening box (20) are both made by CNC subtractive processing; the thin-walled cavity (80) and the exhaust outlet are both made by metal LPBF additive processing; the accompanying flow channel (30) is made by CNC bending of copper tube.

3. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: In step S200, before assembling the exhaust outlet and the accompanying flow channel (30) into a combination, the accompanying flow channel (300) is fixed with a quick clamp (300) and its posture is adjusted to be horizontal and upright; before connecting the accompanying flow channel (30) and the open box (20) in step S300, the quick clamp (300) is removed.

4. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: The exhaust outlet includes several tree-shaped bionic bones (40); the tree-shaped bionic bones (40) are provided with a breathable structure; the breathable structure forms an upper air inlet and a lower exhaust outlet; the upper air inlet is located at the end (42) of the branch of the tree-shaped bionic bone (40); the lower exhaust outlet is located at the root (41) of the trunk of the tree-shaped bionic bone (40).

5. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: When the bottom of the exhaust outlet is higher than the bottom plate of the open box (20), the lower exhaust port is a circumferential exhaust hole.

6. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: The breathable layer (50) includes breathable particles, which need to be compacted during the laying process or an adhesive needs to be filled between the breathable particles.

7. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: The thermally conductive layer (70) includes thermally conductive particles, which need to be compacted during the laying of the thermally conductive particles in step S600.

8. The biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: It also includes step S800, injecting liquid additive: injecting liquid additive into the heat-conducting layer (70) through the filling port (901) on the sealing plate (90) to fill the pores of the heat-conducting layer (70) until the overflow port (902) on the sealing plate (90) discharges bubble-free liquid additive, and then sealing the filling port (901) and the overflow port (902).

9. A biomimetic composite manufacturing method for a mold according to claim 8, characterized in that: In step S400, after the breathable layer (50) is laid, a blocking layer (60) is sprayed on its upper surface.

10. A biomimetic composite manufacturing method for a mold according to claim 1, characterized in that: In step S300, before moving the assembly into the open box (20), a filter element is installed in the vent hole (201) of the bottom plate of the open box (20).

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