Precision casting mold of skin lattice structure and production method

Abstract

The invention discloses a precision casting mold of a skin lattice structure, which comprises an upper mold, a lower mold and a wax mold, the upper mold and the lower mold are respectively arranged on the upper side and the lower side of the wax mold, a row of upper pouring ports are arranged in the upper mold, a row of lower pouring ports are arranged in the lower mold, and the upper pouring ports are communicated with the lower pouring ports. Mounting plates are symmetrically welded and mounted at the two ends of the upper mold and the lower mold, positioning rods are slidably mounted in grooves in the interiors of every two mounting plates in a penetrating manner, a row of upper gaskets are arranged on the inner side of the upper portion of the wax mold in a grooving manner, and a row of lower gaskets are arranged on the inner side of the lower portion of the wax mold in a grooving manner. The precision casting mold of the skin lattice structure is provided with the heat dissipation block, the heat dissipation block is slidably installed in a groove in the front side of the wax mold in a penetrating mode, and then the inner side wall of the heat dissipation block is connected to the inner side wall of the wax mold in an attached mode; and a workpiece cast and formed on the inner side of the wax mold can be quickly subjected to heat conduction and heat dissipation through the movable heat dissipation block in a heat conduction mode, so that the heat dissipation performance of the wax mold is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a precision casting mold for a skin lattice structure and a production method thereof. Background Art

[0002] The skin lattice structure is a new type of structural material consisting of two layers of thin-walled skin and a regularly arranged lattice structure in the middle. This structure is lightweight, has high specific strength, high specific stiffness, and multifunctional potential, and is an ideal material for satellite structural plates. With the innovative development of aerospace technology and its deep integration with the civilian field, the skin lattice structure has been widely used in satellite communications, satellite navigation, satellite remote sensing and other fields; Precision casting molds are important tools used in the casting process to obtain castings of precise dimensions. The structural shape of the part is made in advance with other easily moldable materials (such as wax, gypsum, etc.), and then the mold is placed in the sand mold to form a cavity with the same structural dimensions as the part. Then, a flowing liquid (such as molten metal) is poured into the cavity. After the liquid cools and solidifies, a part with the same shape and structure as the mold can be formed. The precision casting mold of the skin lattice structure usually consists of three parts: the upper mold, the wax mold and the lower mold. A wax mold corresponding to the shape of the skin lattice structure is provided in the wax mold, and metal components (such as heat pipes, thermal control pipes, cable pipes or hydraulic pipes, etc.) can be provided in the wax mold to improve the heat dissipation performance. The upper mold and the lower mold are respectively provided with an upper pouring riser and a lower pouring riser extending to the wax mold for pouring molten metal; When producing a precision casting mold for a skin lattice structure, first use an additive manufacturing method (such as SLA, MJM, 3DP or FDM, etc.) to produce a wax mold with the same shape as the skin lattice structure. Then, a cavity corresponding to the shape of the metal component is machined in the wax mold, and the metal component is placed in it. Then, the investment casting method is used to wrap the wax mold with refractory material to form a ceramic shell, and the wax mold is melted after baking to form a cavity. Finally, pour the metal liquid into the ceramic shell, and after the metal liquid solidifies, remove the ceramic shell and finish it to obtain the finished product; The precision casting mold of the skin lattice structure can embed metal components into the skin lattice structure, improving the heat dissipation and overall performance of the structure. At the same time, the precision casting process ensures the dimensional accuracy and surface finish of the casting, reducing the workload of subsequent processing; When the precision casting mold of the skin lattice structure is used to cast and mold the workpiece, most of them rely on the natural heat transfer of the material itself to dissipate heat. However, this heat dissipation method is very simple, and the heat dissipation performance is not ideal. It is very time-consuming and labor-intensive, which reduces the heat dissipation performance of the casting mold. In order to overcome the above defects, prior art 1 (application number CN202410265794.8, Chinese patent with application date of 2024-03-08) discloses a precision casting mold and production method of a skin lattice structure, in which a metal element is built into a wax mold, the wax mold is melted by heating, a cavity is formed in the mold, and liquid metal is injected into the mold to form a skin lattice structure by casting, thereby improving the heat dissipation of the skin lattice structure and increasing the production speed; Although the existing technology can improve the heat dissipation performance of the casting mold and better dissipate heat and cool the workpiece after casting, it still needs to be manually demolded after the workpiece is cast, and the workpiece after casting will stick to the inner wall of the mold cavity due to the high temperature, which increases the molding rate of the later workpiece and is inconvenient for the molding processing of the later casting workpiece; Therefore, we propose a precision casting mold and production method for a skin lattice structure in order to solve the above-mentioned problems. Summary of the invention

[0003] The purpose of the present invention is to provide a precision casting mold and production method of a skin lattice structure, so as to solve the problem raised by the above background technology that when the precision casting mold of the skin lattice structure in the current market is used to cast and mold the workpiece, most of them rely on the natural heat transfer and heat dissipation of the material itself, but this heat dissipation method is very simple, and the heat dissipation performance is not ideal, which is very time-consuming and labor-intensive, and reduces the heat dissipation performance of the casting mold.

[0004] To achieve the above object, the present invention provides the following technical solution: a precision casting mold of a skin lattice structure, comprising an upper mold, a lower mold and a wax mold, wherein the upper mold and the lower mold are respectively arranged on the upper and lower sides of the wax mold, and the upper mold and the lower mold are symmetrically arranged about the transverse center line of the wax mold; It also includes: a row of upper pouring ports is provided inside the upper mold, a row of lower pouring ports is provided inside the lower mold, mounting plates are symmetrically welded and installed at both ends of the upper mold and the lower mold, positioning rods are slidably installed through the internal slots of every two mounting plates, and the structures of the four positioning rods are the same, the two mounting plates at the left and right ends are both slotted and threaded to be connected with bidirectional screw rods, and the outer ends of the four bidirectional screw rods are connected to driving mechanisms; A row of upper gaskets is arranged in the upper inner groove of the wax mold, and a row of lower gaskets is arranged in the lower inner groove of the wax mold, and the row of lower gaskets and the row of upper gaskets are symmetrically arranged about the horizontal center line of the wax mold, and the row of lower gaskets is in a "cross" shape, and a heat sink block is slidably installed through the outer groove of the wax mold, and the outer end of the heat sink block is in an inclined shape, and the inner side of the heat sink block is fitly connected to the inner wall of the wax mold, and the outer end of the heat sink block extends through to the outside of the wax mold.

[0005] Preferably, a first tension spring is provided in a groove on the front side of the wax mold, and an outer end of the first tension spring is connected to a heat sink.

[0006] Preferably, the inner sides of the left ends of the upper mold and the lower mold are connected to first pull ropes, and the outer ends of the two first pull ropes are connected to heat dissipation blocks through guide wheels.

[0007] Preferably, a heat exchange tube is arranged in a groove inside the wax mold, and a liquid inlet tube is arranged in a groove at the left end of the heat exchange tube, and a liquid outlet tube is arranged in a groove at the right end of the heat exchange tube.

[0008] Preferably, a demoulding box is positioned and installed at the right end of the wax mold, and a positioning shaft is slidably installed through the internal groove of the demoulding box, and a beating block is installed through the outer side of the positioning shaft, and the outer side of the beating block is fitly connected to the inner wall of the demoulding box.

[0009] Preferably, the outer end of the positioning shaft extends through and extends to the outside of the demolding box, and a transmission gear is installed through the outer end of the positioning shaft, and the two sides of the transmission gear correspond to the first mounting frame and the second mounting frame respectively, the first mounting frame and the second mounting frame are respectively installed on the inner side of the right end of the upper mold and the lower mold by screws, and racks are arranged on the inner sides of the first mounting frame and the second mounting frame.

[0010] Preferably, both sides of the outer end of the positioning shaft are grooved and a pull block is slidably installed through the second tension spring, and the two pull blocks are symmetrically arranged about the vertical center line of the positioning shaft, and the outer ends of the two pull blocks are connected to the second pull rope; The outer ends of the two second pull ropes are connected to positioning blocks through guide wheels, and the two positioning blocks are symmetrically installed on both sides of the inner end of the positioning shaft. At the same time, the outer ends of the two positioning blocks extend to the upper and lower sides of the interior of the demoulding box.

[0011] Preferably, both sides of the inner end of the positioning shaft are grooved with extrusion springs, and the two extrusion springs have the same structure, and the outer ends of the two extrusion springs are connected to positioning blocks.

[0012] Preferably, the method comprises the following steps: S1. Wax model making Additive manufacturing, using additive manufacturing technology to produce wax models. Additive manufacturing technology can accurately control the shape and size of the wax model to ensure high consistency with the final product. The structure of the wax model is the same as the desired skin lattice structure, and the cavity of the metal component has been reserved inside; Metal component embedding: pre-prepared metal components are placed in the wax model cavity. These metal components need to be precisely processed and positioned according to design requirements. S2. Shell production Refractory coating: evenly apply refractory material on the wax model and repeat this process to form a multi-layer refractory coating. After drying and hardening, the refractory coating will form a ceramic shell to protect the wax model from being destroyed during the subsequent melting process. Firing: The wax model wrapped with the refractory coating is fired. Under high temperature, the wax model will melt and flow out of the ceramic shell to form a cavity in the same shape as the wax model. At the same time, the refractory coating will be further hardened and sintered to enhance its strength. S3. Metal pouring and cooling Metal liquid pouring, pouring molten metal liquid into the fired ceramic shell, the metal liquid cools and solidifies in the cavity to form a blank; Cooling and shelling: After the metal liquid is completely solidified, it is cooled, and then the ceramic shell outside the blank is removed and necessary cleaning and trimming are carried out; S4. Finished product processing and testing Post-processing: further processing and treatment of the blank after removing the ceramic shell to obtain the final skin lattice structure product; Quality inspection: strict quality inspection of finished products to ensure that they meet design requirements and usage standards.

[0013] Compared with the prior art, the present invention has the following beneficial effects: A heat sink is provided, and a heat sink is installed by sliding through a slot on the front side of the wax mold, and then the inner wall of the heat sink is connected to the inner wall of the wax mold in a close fit. The movable heat sink can quickly conduct heat and dissipate heat to the workpiece after casting inside the wax mold by heat conduction, so as to improve the heat dissipation performance of the wax mold and improve the production efficiency of the workpiece in the later stage. Furthermore, a first pull rope is connected to the inner side of the left end of the upper mold and the lower mold through a guide wheel, and then the two first pull ropes are connected to the heat sink through the guide wheel. When the upper mold and the lower mold need to be lifted and moved for demoulding, the moved upper mold and the lower mold will pull the first pull rope through the guide wheel to pull the heat sink to move and conduct heat on the outer side of the wax mold, thereby improving the heat dissipation performance of the wax mold. Finally, the elastic force of the first tension spring itself can be used to elastically reset the position of the heat sink after pulling, so as to facilitate repeated use in the later stage. Furthermore, a heat exchange tube is provided in a groove inside the wax mold, and then a liquid inlet tube and a liquid outlet tube are respectively provided at both ends of the heat exchange tube. When the workpiece cast inside the wax mold needs to be cooled and dissipated, it is only necessary to transport the external coolant to the heat exchange tube through the liquid inlet tube to exchange heat with the high-temperature heat inside the wax mold, and then discharge the coolant after heat exchange from the liquid outlet tube to realize continuous heat exchange of the wax mold, thereby improving the overall heat dissipation performance of the wax mold. A beating block is provided, and a demoulding box is installed at the right end of the wax mold for positioning, and then a positioning shaft is installed through a slot in the demoulding box for sliding, and a beating block is installed through the outer side of the positioning shaft. When the upper mold rises to demould the workpiece, the rising upper mold will drive the first mounting frame to rotate through the rack to drive the transmission gear. At this time, the rotating transmission gear will simultaneously drive the beating block installed through the outer side of the positioning shaft to reciprocate and beat the demoulding box, so that the workpiece after casting inside the wax mold can be demoulded by vibration, so as to avoid the workpiece sticking to the inner wall of the wax mold due to high temperature heat and affecting the later demoulding processing; Furthermore, by utilizing grooves on both sides of the outer end of the positioning shaft and slidingly installing pull blocks through the second tension spring, when it is necessary to demold the workpiece after being cast at the bottom of the wax mold, it is only necessary to manually pull the two pull blocks to drive the second pull rope to pull the two positioning blocks through the guide wheel to retract and move, thereby facilitating the positioning shaft to pass through the inner side of the demolding box and move the transmission gear to engage with the rack set on the outside of the second mounting frame, so that the workpiece after being cast at the bottom of the wax mold can be demolded, and the operation is more time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure after the upper mold, the lower mold and the wax mold are separated; Figure 3 It is a bottom-up three-dimensional structural schematic diagram of the wax model and the lower gasket of the present invention; Figure 4 It is a schematic diagram of the partial three-dimensional structure of the wax mold and the heat exchange tube of the present invention; Figure 5 This is a schematic diagram of the main structure of the upper mold, lower mold and wax mold of the present invention; Figure 6 This is a schematic diagram of the main structure of the upper mold and the wax mold after they are moved; Figure 7 This is a schematic diagram of the main structure of the lower mold and the wax mold after they move; Figure 8 It is a partial front view structural diagram of the wax mold and the demoulding box of the present invention; Fig. 9 It is a schematic diagram of the partial three-dimensional structure of the demoulding box and the transmission gear of the present invention; Fig.10 This is a schematic diagram of the three-dimensional structure of the positioning shaft and the transmission gear of the present invention; Fig.11 It is a schematic diagram of the partial top-sectional structure of the positioning shaft and the positioning block of the present invention.

[0015] In the figure: 1. upper mold; 2. lower mold; 3. upper pouring port; 4. lower pouring port; 5. mounting plate; 6. positioning rod; 7. bidirectional screw rod; 8. wax mold; 9. upper gasket; 10. heat sink; 11. liquid inlet pipe; 12. lower gasket; 13. liquid outlet pipe; 14. heat exchange tube; 15. first pull rope; 16. first tension spring; 17. demoulding box; 18. first mounting bracket; 19. second mounting bracket; 20. transmission gear; 21. positioning shaft; 22. rack; 23. slapping block; 24. pulling block; 25. second tension spring; 26. positioning block; 27. extrusion spring; 28. second pull rope. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention provides the following technical solutions: Embodiment 1, in order to solve the problem that when the existing precision casting mold of the skin lattice structure is used to cast and mold the workpiece, most of them rely on the material itself to dissipate heat naturally, but this heat dissipation method is very simple, which reduces the heat dissipation performance of the casting mold, the following is disclosed: An upper mold 1, a lower mold 2 and a wax mold 8, wherein the upper mold 1 and the lower mold 2 are respectively arranged on the upper and lower sides of the wax mold 8, and the upper mold 1 and the lower mold 2 are symmetrically arranged about the transverse center line of the wax mold 8; The upper mold 1 also includes: a row of upper pouring ports 3 is provided inside the upper mold 1, a row of lower pouring ports 4 is provided inside the lower mold 2, mounting plates 5 are symmetrically welded and installed at both ends of the upper mold 1 and the lower mold 2, and positioning rods 6 are slidably installed through the internal grooves of every two mounting plates 5, and the structures of the four positioning rods 6 are the same, and the two mounting plates 5 at the left and right ends are both slotted and threaded to be connected with bidirectional screw rods 7, and the outer ends of the four bidirectional screw rods 7 are connected to driving mechanisms; A row of upper gaskets 9 are provided in the upper inner groove of the wax mold 8, and a row of lower gaskets 12 are provided in the lower inner groove of the wax mold 8, and the row of lower gaskets 12 and the row of upper gaskets 9 are symmetrically arranged about the horizontal center line of the wax mold 8, and the row of lower gaskets 12 is in a "cross" shape, and a heat sink 10 is slidably installed through the outer groove of the wax mold 8, and the outer end of the heat sink 10 is in an inclined shape, and the inner side of the heat sink 10 is fitly connected to the inner wall of the wax mold 8, and the outer end of the heat sink 10 extends through to the outside of the wax mold 8.

[0018] A first tension spring 16 is provided in a groove on the front side of the wax mold 8, and the outer end of the first tension spring 16 is connected to the heat sink 10. The inner sides of the left ends of the upper mold 1 and the lower mold 2 are connected to first pull ropes 15, and the outer ends of the two first pull ropes 15 are connected to the heat sink 10 through guide wheels.

[0019] The inner groove of the wax mold 8 is fitted with a heat exchange tube 14 , and the left end of the heat exchange tube 14 is grooved with a liquid inlet tube 11 , and the right end of the heat exchange tube 14 is grooved with a liquid outlet tube 13 .

[0020] like Figure 1-Figure 7 As shown, when the workpiece needs to be heat-conducted and dissipated after the wax mold 8 is cast and formed, the external coolant is transported to the heat exchange tube 14 through the liquid inlet pipe 11 to exchange heat with the high-temperature heat inside the wax mold 8, and then the coolant after heat exchange inside the heat exchange tube 14 is discharged from the heat exchange tube 14 to realize the circulation heat exchange cooling of the wax mold 8, thereby improving the overall heat dissipation performance of the wax mold 8; Then, when the workpiece cast in the wax mold 8 is demolded, the moving upper mold 1 and the lower mold 2 will drive the first pull rope 15 to simultaneously pull the heat sink 10 to move its position on the outside of the wax mold 8 through the guide wheel. Because the inner wall of the wax mold 8 is fitted and connected to the inner wall of the heat sink 10, the high-temperature heat inside the wax mold 8 can be well discharged to the outside of the heat sink 10 by heat conduction, thereby improving the heat dissipation performance of the wax mold 8. Finally, the elastic force of the first tension spring 16 can be used to elastically reset the position of the heat sink 10 after pulling, so as to facilitate later reuse.

[0021] Embodiment 2 is different from Embodiment 2 in that the workpiece after casting inside the wax mold 8 can be automatically vibrated and demolded by the beating block 23, so as to avoid the workpiece being subjected to high temperature and adhering to the inner wall of the wax mold 8 and affecting the later demolding operation. A demoulding box 17 is installed at the right end of the wax mold 8, and a positioning shaft 21 is slidably installed through the internal groove of the demoulding box 17, and a slapping block 23 is installed through the outer side of the positioning shaft 21, and the outer side of the slapping block 23 is fit-connected to the inner wall of the demoulding box 17.

[0022] The outer end of the positioning shaft 21 extends through and extends to the outside of the demolding box 17. At the same time, a transmission gear 20 is installed through the outer end of the positioning shaft 21, and the two sides of the transmission gear 20 correspond to the first mounting frame 18 and the second mounting frame 19 respectively. The first mounting frame 18 and the second mounting frame 19 are respectively installed on the inner side of the right end of the upper mold 1 and the lower mold 2 by screws, and the inner side of the first mounting frame 18 and the second mounting frame 19 is provided with a rack 22.

[0023] Both sides of the outer end of the positioning shaft 21 are grooved and a pull block 24 is slidably installed through the second tension spring 25, and the two pull blocks 24 are symmetrically arranged about the vertical center line of the positioning shaft 21, and the outer ends of the two pull blocks 24 are connected to the second pull rope 28; The outer ends of the two second pull ropes 28 are connected to the positioning blocks 26 through the guide wheels, and the two positioning blocks 26 are symmetrically installed on both sides of the inner end of the positioning shaft 21. At the same time, the outer ends of the two positioning blocks 26 extend to the upper and lower sides of the interior of the demoulding box 17.

[0024] Both sides of the inner end of the positioning shaft 21 are grooved to provide extrusion springs 27 , and the two extrusion springs 27 have the same structure, and the outer ends of the two extrusion springs 27 are connected to positioning blocks 26 .

[0025] like Figure 1-Figure 11 As shown, when the upper mold 1 is reset and moved upward, the first mounting frame 18 arranged at the bottom thereof will drive the transmission gear 20 to rotate through the rack 22, and then the transmission gear 20 will drive the positioning shaft 21 connected through the inner side thereof to drive the beating block 23 to reciprocately beat inside the demoulding box 17, and at this time, the demoulding box 17 that is beaten will automatically vibrate and demould the workpiece after casting inside the wax mold 8 by vibration, so as to avoid the workpiece being subjected to high temperature heat and sticking to the inner wall of the wax mold 8, which will affect the demoulding use in the later stage; When it is necessary to demold the workpiece after casting at the bottom of the wax mold 8, it is only necessary to manually pull the two pull blocks 24 and drive the two second pull ropes 28 through the guide wheels to simultaneously pull the two positioning blocks 26 to retract and move, so that the positioning shaft 21 is separated from the demolding box 17. At this time, the positioning shaft 21 can be driven to move on the inner side of the demolding box 17. When the positioning shaft 21 drives the transmission gear 20 to mesh and connect to the rack 22 set on the outside of the second mounting frame 19, the two pull blocks 24 are released, and then the two second tension springs 25 will elastically reset the positions of the two pulled pull blocks 24 through their own elastic force. At this time, the two extrusion springs 27 will automatically pop out the two positioning blocks 26 to the upper and lower sides of the interior of the demolding box 17 through their own elastic force, so as to realize the positioning of the position of the positioning shaft 21 after movement, and better demold the workpiece after casting at the bottom of the wax mold 8. The operation is more time-saving and labor-saving, thereby completing a series of work.

[0026] A method for producing a precision casting mold for a skin lattice structure comprises the following steps; S1. Wax model 8 production Additive manufacturing, using additive manufacturing technology to produce the wax model 8. Additive manufacturing technology can accurately control the shape and size of the wax model 8 to ensure high consistency with the final product. The structure of the wax model 8 is the same as the desired skin lattice structure, and a cavity for metal components has been reserved inside; Metal component embedding: pre-prepared metal components are placed in the cavity of the wax model 8. These metal components need to be precisely processed and positioned according to design requirements; S2. Shell production Refractory material coating, refractory material is evenly applied on the wax model 8, and this process is repeated to form a multi-layer refractory coating, which will form a ceramic shell after drying and hardening to protect the wax model 8 from being damaged during the subsequent melting process; Firing, the wax model 8 wrapped with the refractory coating is subjected to a calcining treatment. Under high temperature, the wax model 8 will melt and flow out of the ceramic shell to form a cavity in the same shape as the wax model 8. At the same time, the refractory coating will further harden and sinter to enhance its strength; S3. Metal pouring and cooling Metal liquid pouring, pouring molten metal liquid into the fired ceramic shell, the metal liquid cools and solidifies in the cavity to form a blank; Cooling and shelling: After the metal liquid is completely solidified, it is cooled, and then the ceramic shell outside the blank is removed and necessary cleaning and trimming are carried out; S4. Finished product processing and testing Post-processing: further processing and treatment of the blank after removing the ceramic shell to obtain the final skin lattice structure product; Quality inspection: strict quality inspection of finished products to ensure that they meet design requirements and usage standards.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision casting mold for a skin lattice structure, comprising an upper mold (1), a lower mold (2) and a wax mold (8), wherein the upper mold (1) and the lower mold (2) are respectively arranged on the upper and lower sides of the wax mold (8), and the upper mold (1) and the lower mold (2) are symmetrically arranged about the transverse center line of the wax mold (8); It is characterized in that Also includes: A row of upper pouring ports (3) is provided inside the upper mold (1), a row of lower pouring ports (4) is provided inside the lower mold (2), and mounting plates (5) are symmetrically welded and mounted at both ends of the upper mold (1) and the lower mold (2); A positioning rod (6) is slidably installed through the internal slots of each of the two mounting plates (5), and the four positioning rods (6) have the same structure; the two mounting plates (5) at the left and right ends are both slotted and threadedly connected with a bidirectional screw rod (7), and the outer ends of the four bidirectional screw rods (7) are all connected to a driving mechanism; A row of upper gaskets (9) is provided in the upper inner groove of the wax model (8), and a row of lower gaskets (12) is provided in the lower inner groove of the wax model (8), and the row of lower gaskets (12) and the row of upper gaskets (9) are symmetrically arranged about the transverse center line of the wax model (8), and the row of lower gaskets (12) is in the shape of a "cross"; The outer groove of the wax mold (8) penetrates through which a heat sink (10) is slidably mounted, and the outer end of the heat sink (10) is inclined, and the inner side of the heat sink (10) is fitted and connected to the inner side wall of the wax mold (8), and the outer end of the heat sink (10) penetrates and extends to the outside of the wax mold (8).

2. The precision casting mold of the skin lattice structure according to claim 1, characterized in that: A first tension spring (16) is provided in a groove on the front side of the wax mold (8), and the outer end of the first tension spring (16) is connected to a heat sink (10).

3. The precision casting mold of the skin lattice structure according to claim 2, characterized in that: The inner sides of the left ends of the upper mold (1) and the lower mold (2) are both connected to first pull ropes (15), and the outer ends of the two first pull ropes (15) are both connected to a heat sink (10) via a guide wheel.

4. The precision casting mold of the skin lattice structure according to claim 1, characterized in that: The wax mold (8) has an internal groove formed therein to fit with a heat exchange tube (14), and a liquid inlet tube (11) is formed in the groove at the left end of the heat exchange tube (14), and a liquid outlet tube (13) is formed in the groove at the right end of the heat exchange tube (14).

5. The precision casting mold of the skin lattice structure according to claim 4, characterized in that: A demoulding box (17) is positioned and installed at the right end of the wax mold (8), and a positioning shaft (21) is slidably installed through an internal slot of the demoulding box (17), and a slapping block (23) is installed through the outer side of the positioning shaft (21), and the outer side of the slapping block (23) is fitted and connected to the inner side wall of the demoulding box (17).

6. The precision casting mold of the skin lattice structure according to claim 5, characterized in that: The outer end of the positioning shaft (21) extends through and extends to the outside of the demoulding box (17), and a transmission gear (20) is installed through the outer end of the positioning shaft (21), and the two sides of the transmission gear (20) correspond to a first mounting frame (18) and a second mounting frame (19), respectively, the first mounting frame (18) and the second mounting frame (19) are respectively installed on the inner side of the right end of the upper mold (1) and the lower mold (2) by screws, and racks (22) are provided on the inner sides of the first mounting frame (18) and the second mounting frame (19).

7. The precision casting mold of the skin lattice structure according to claim 6, characterized in that: Both sides of the outer end of the positioning shaft (21) are grooved and a pull block (24) is slidably installed through a second tension spring (25), and the two pull blocks (24) are symmetrically arranged about the vertical center line of the positioning shaft (21), and the outer ends of the two pull blocks (24) are connected to a second pull rope (28); The outer ends of the two second pull ropes (28) are connected to the positioning blocks (26) through the guide wheel, and the two positioning blocks (26) are symmetrically installed on both sides of the inner end of the positioning shaft (21), and the outer ends of the two positioning blocks (26) extend to the upper and lower sides of the interior of the demoulding box (17).

8. The precision casting mold of the skin lattice structure according to claim 7, characterized in that: Both sides of the inner end of the positioning shaft (21) are grooved to provide a compression spring (27), the two compression springs (27) have the same structure, and the outer ends of the two compression springs (27) are connected to a positioning block (26).

9. The method for producing a precision casting mold for a skin lattice structure according to claim 1, characterized in that: The steps include: S1. Wax model (8) production Additive manufacturing, using additive manufacturing technology to produce a wax model (8), the additive manufacturing technology can accurately control the shape and size of the wax model (8), ensuring a high degree of consistency with the final product, the structure of the wax model (8) is the same as the desired skin lattice structure, and a cavity for a metal component is reserved inside; Metal component embedding: pre-prepared metal components are placed in the cavity of the wax model (8). These metal components need to be precisely processed and positioned according to design requirements; S2. Shell production Refractory coating, evenly coating the wax model (8) with refractory material, and repeating this process to form a multi-layer refractory coating, which will form a ceramic shell after drying and hardening to protect the wax model (8) from being damaged during the subsequent melting process; Firing, the wax model (8) wrapped with the refractory coating is subjected to a calcining treatment. Under high temperature, the wax model (8) will melt and flow out of the ceramic shell to form a cavity in the same shape as the wax model (8), and the refractory coating will further harden and sinter to enhance its strength; S3. Metal pouring and cooling Metal liquid pouring, pouring molten metal liquid into the fired ceramic shell, the metal liquid cools and solidifies in the cavity to form a blank; Cooling and shelling: After the metal liquid is completely solidified, it is cooled, and then the ceramic shell outside the blank is removed and necessary cleaning and trimming are carried out; S4. Finished product processing and testing Post-processing: further processing and treatment of the blank after removing the ceramic shell to obtain the final skin lattice structure product; Quality inspection: strict quality inspection of finished products to ensure that they meet design requirements and usage standards.

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