Porous extrusion micro-channel flat pipe mold and preparation method thereof

Abstract

The invention discloses a multi-hole extrusion micro-channel flat pipe mold and a preparation method thereof, and relates to the technical field of micro-channel flat pipe molds, the multi-hole extrusion micro-channel flat pipe mold comprises a foundation bottom plate, two fixing side plates are arranged on the upper surface of the foundation bottom plate, a mold mechanism is further arranged on the upper surface of the foundation bottom plate, and the mold mechanism comprises a sliding assembly and a forming assembly; the sliding assembly comprises a sliding bottom plate, the sliding bottom plate is arranged on the upper surface of the foundation bottom plate, a sliding groove facilitating sliding of the sliding bottom plate is formed in the upper surface of the foundation bottom plate, the forming assembly comprises an auxiliary mounting frame and a main mounting frame, and the auxiliary mounting frame is fixedly mounted on the upper surface of a sliding auxiliary plate. By arranging the mold mechanism, efficient assembly and disassembly of the mold are achieved, the working efficiency before and after use is improved, the problem that flat pipe forming is unstable due to residual metal in the mold is solved, and the production quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of microchannel flat tube molds, in particular to a multi-hole extrusion microchannel flat tube mold and a preparation method thereof. Background Art

[0002] With the rapid development of modern industry, porous extruded microchannel flat tubes have shown broad application prospects in many fields. With their unique structure, porous extruded microchannel flat tubes have a large specific surface area and efficient heat and mass transfer performance, and play an irreplaceable role in key fields such as heat exchangers, refrigeration equipment, and chemical reactors. In the field of heat exchangers, porous extruded microchannel flat tubes can significantly improve heat exchange efficiency and reduce energy consumption, which is in line with the current development trend of energy conservation and emission reduction. In refrigeration equipment, their excellent performance helps to improve the refrigeration effect and ensure the stable operation of the equipment. In chemical reactors, porous extruded microchannel flat tubes provide an ideal place for chemical reactions and promote the efficient conduct of reactions. In order to meet the market's growing demand for porous extruded microchannel flat tubes, the research and development and manufacturing of porous extruded microchannel flat tube molds are crucial. As the core tool in the production process, the performance and quality of the mold directly determine the molding effect and production efficiency of the flat tube.

[0003] In the field of manufacturing porous extruded microchannel flat tubes, the performance and ease of operation of the mold have a vital impact on product quality and production efficiency. At present, there are many shortcomings in the existing porous extruded microchannel flat tube molds. In terms of mold assembly and disassembly, the existing mold structure is complex, the installation and disassembly process is cumbersome, and it consumes a lot of time and manpower, resulting in low efficiency in pre-production preparation and post-use cleaning, which seriously affects the overall production progress. The flow state of the metal liquid inside the mold is difficult to effectively monitor and adjust. After repeated use, the metal liquid is likely to remain inside the mold and solidify, hindering the flow of the metal liquid, causing the flow rate to decrease, and making the wall thickness of the flat tube thicker. Unevenness, rough surface and other defects occur frequently, and the existing technology lacks effective means to monitor and adjust the flow rate of molten metal in real time, which makes it impossible to ensure that the molten metal is evenly distributed in the mold, making it difficult to produce high-quality flat tube products. In addition, the cooling effect of the mold is not ideal, and the solidification of residual molten metal will hinder heat dissipation, causing the mold temperature to rise, affecting the microstructure of the metal, and reducing the strength and toughness of the flat tube. The cooling components of the existing mold cannot adjust the cooling intensity in real time according to the temperature inside the mold, making it difficult to ensure that the flat tube is evenly and properly cooled after being ejected from the mold. Local overheating or overcooling is prone to occur, increasing thermal stress and tissue stress, and further affecting the mechanical properties of the flat tube. Summary of the Invention

[0004] The object of the present invention is to provide a multi-hole extrusion microchannel flat tube die and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a multi-hole extrusion microchannel flat tube die and a method for preparing the same, comprising: A base plate, wherein two fixed side plates are provided on the upper surface of the base plate, and a mold mechanism is further provided on the upper surface of the base plate, wherein the mold mechanism includes a sliding assembly and a molding assembly, and the sliding assembly includes: a sliding base plate, wherein the sliding base plate is provided on the upper surface of the base plate, and a sliding groove is provided on the upper surface of the base plate to facilitate the sliding of the sliding base plate, and a sliding vertical plate is provided on both side surfaces of the sliding base plate, and a side connecting plate is provided on one side surface of the sliding vertical plate, and a telescopic motor is provided on the upper surface of the fixed side plate, and the output shaft end of the telescopic motor is connected to one side surface of the side connecting plate; The molding assembly includes: a sub-mounting frame and a main mounting frame, the sub-mounting frame is fixedly mounted on the upper surface of the sliding sub-plate, the main mounting frame is fixedly mounted on the upper surface of the sliding main plate, the upper surfaces of the sub-mounting frame and the main mounting frame are both provided with a rotatable rotating clamping plate, one side surface of the rotating clamping plate is provided with a rotatable buckle, one side surface of the sub-mounting frame and the main mounting frame is provided with a bayonet matching the buckle, the connection between the sub-mounting frame and the main mounting frame and the rotating clamping plate is provided with a rotating shaft, the upper surfaces of the two rotating clamping plates are respectively provided with a sub-positioning plate and a main positioning plate, the upper surface of the main mounting frame is provided with an outer mold sleeve, and the upper surface of the sub-mounting frame is provided with a center mold sleeve.

[0006] Furthermore, a servo motor is provided on the upper surface of the sliding base plate, a bidirectional threaded rod is provided on the output end of the servo motor, a movable engaging vertical plate is provided on the upper surface of the sliding base plate, and a limiting slide groove is provided on the upper surface of the sliding base plate to facilitate the sliding of the engaging vertical plate. A threaded hole engaged with the bidirectional threaded rod is provided at the center of the engaging vertical plate, and a sliding main plate and a sliding sub-plate are respectively provided on the upper surfaces of the two engaging vertical plates. A sliding groove is provided on the upper surface of the sliding vertical plate to facilitate the sliding of the sliding main plate and the sliding sub-plate.

[0007] Furthermore, a plurality of positioning grooves are provided on one side surface of the auxiliary positioning plate, a positioning rod matching the positioning grooves is provided on one side surface of the main positioning plate, fixing inserts are provided on the upper and lower surfaces of the outer mold sleeve and the central mold sleeve, mounting grooves matching the fixing inserts below are provided on the upper surfaces of the auxiliary mounting frame and the main mounting frame, and mounting grooves matching the fixing inserts above are provided on the bottom surfaces of the two rotating clamping plates.

[0008] Furthermore, a central opening is provided at the center of the outer mold sleeve, a fixing connection block is provided at the center of the central mold sleeve, a side surface of the fixing connection block is provided with a mold core that matches the central opening, and the upper and lower surfaces of the mold core are provided with fixing grooves, a side surface of the fixing connection block is provided with an adsorption groove, and a side surface of the mold core is provided with a plurality of connecting rods, and the other end of the connecting rod is connected to the inner side surface of the central mold sleeve.

[0009] Furthermore, a connecting flange is provided on one side surface of the central mold sleeve, a sealing ring is provided on one side surface of the connecting flange, a closed slot matching the sealing ring is opened on one side surface of the central mold sleeve, a central connecting plate is provided at the center of the connecting flange, an insulating box is provided at the center of the central connecting plate, a small motor is provided inside the insulating box, a plurality of stirring rods are provided on the output shaft of the small motor, a plurality of micro openings are opened on the surface of the stirring rods, a locking fitting block is provided on one side surface of the central connecting plate, a temperature detector and a flow rate detector are respectively provided on the upper and lower surfaces of the inner upper and lower surfaces of the locking fitting block, an elastic block matching the locking groove is provided, and an adsorption magnet matching the adsorption groove is provided on one side surface of the locking fitting block.

[0010] Furthermore, the mold mechanism also includes a cooling component and a trigger component, and the cooling component includes: an air supply box, the air supply box is located between two sliding main boards, a driving motor is provided at the connection between the air supply box and the sliding main board, side air slots are provided on both side surfaces of the air supply box, two exhaust fans are provided inside the air supply box, the output directions of the two exhaust fans are opposite, and the upper surfaces of the two exhaust fans are respectively provided with air inlet pipes and air outlet pipes, a refrigeration frame is provided on the upper surface of the air supply box, and the inner side surface of the refrigeration frame is provided with heat-absorbing grooves, a cold liquid storage tank is also provided inside the air supply box, and a liquid injection port that matches the cold liquid storage tank is also provided on the upper surface of the air supply box.

[0011] Furthermore, the trigger assembly includes a trigger platform, which is fixedly mounted on the upper surface of the sliding base plate, and the upper surface of the trigger platform is provided with a slidable driven plate body, and the upper surface of the trigger platform is provided with a driven slide groove that cooperates with the driven plate body, and one side surface of the driven plate body is provided with two connecting blocks, the other end of the connecting block is connected to the one side surface of the sliding main board, and one side surface of the connecting block is provided with a limiting protrusion, and the upper surface of the trigger platform is provided with a limiting plate body, and the two side surfaces of the limiting plate body are respectively provided with an auxiliary trigger switch and a main trigger switch, and there is an electrical connection between the auxiliary trigger switch and the main trigger switch and the driving motor, and a connecting rod is provided on one side surface of the driven plate body, and a circular hole is provided on the surface of the limiting plate body for the connecting rod to pass through, and a pressing plate body is provided on the other end surface of the connecting rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In this solution, a sliding assembly is provided, which is driven by a telescopic motor and a servo motor to realize the automated assembly and disassembly of the molding assembly, reducing the complexity and time cost of manual disassembly. At the same time, the flexible sliding design of the sliding base plate and the meshing vertical plate enables the mold to be quickly replaced and adjusted according to different production requirements, thereby improving the flexibility and efficiency of production. The design of the sliding assembly enables the mold to be quickly separated after the manufacturing work is completed, facilitating the cleaning of the residual molten metal inside and avoiding the difficulty of cleaning caused by the solidification of the molten metal. 2. In this solution, a molding assembly is provided. The stirring rod and micro-opening design in the molding assembly can increase the fluidity of the molten metal by stirring when the flow rate of the molten metal is insufficient, temporarily compensate for the blocking effect of the internal solidified metal, ensure the uniform distribution of the molten metal in the mold, and reduce the occurrence of defects such as uneven wall thickness and rough surface of the flat tube. The molding assembly is integrated with a temperature detector and a flow rate detector, which can monitor the flow rate and temperature of the molten metal in real time. Once insufficient flow rate or excessive temperature is detected, the small motor or cooling assembly can be driven by a signal to start, and the fluidity and temperature of the molten metal can be adjusted in time to ensure the stability of the molding process and the quality of the flat tube. The molding assembly adopts a modular design. The outer mold sleeve and the center mold sleeve are quickly installed and disassembled through the clamping inserts and the mounting groove, which is convenient for assembly and debugging of the mold, and also convenient for rapid separation and cleaning of the mold after the manufacturing work is completed, thereby improving production efficiency. 3. In this solution, a cooling component is provided, and the air supply box, exhaust fan and refrigeration frame design in the cooling component form an efficient cooling system. By inhaling external air and combining it with the refrigerant, cold air is formed to evenly cool the flat tubes, ensuring that the flat tubes can be quickly cooled and shaped after being demolded, reducing problems such as changes in structural properties and decreased dimensional accuracy caused by excessive temperature. Through the efficient cooling effect of the cooling component, the flat tubes can maintain stable structural properties and dimensional accuracy after molding, which helps to reduce product defects and improve product quality, while also helping to improve production efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the mold structure of the present invention; Figure 3 It is a rear view structural diagram of the mold mechanism of the present invention; Figure 4 It is a schematic structural diagram of the molding assembly of the present invention; Figure 5 This is a schematic diagram of the outer mold sleeve structure of the present invention; Figure 6 This is a schematic diagram of the central mold sleeve structure of the present invention; Figure 7 This is a schematic diagram of the rear view structure of the center mold sleeve of the present invention; Figure 8 This is a schematic diagram of the connecting flange structure of the present invention; Figure 9 This is a schematic diagram of the rear view structure of the connecting flange of the present invention; Figure 10 This is a schematic structural diagram of the main positioning plate and the auxiliary positioning plate of the present invention; Figure 11 This is a schematic diagram of the cooling component structure of the present invention; Figure 12 Schematic diagram of the internal structure of the air supply box of the present invention; Figure 13 It is a schematic diagram of the trigger component structure of the present invention.

[0014] In the figure: 1. Base plate; 2. Sliding base plate; 3. Fixed side plate; 4. Sliding groove; 5. Trigger platform; 6. Sliding vertical plate; 7. Sliding main plate; 8. Sliding groove; 9. Main mounting frame; 10. Air supply box; 11. Rotating clamping plate; 12. Main positioning plate; 13. Auxiliary positioning plate; 14. Auxiliary mounting frame; 15. Connecting flange; 16. Telescopic motor; 17. Sliding auxiliary plate; 18. Side connecting plate; 19. Center connecting plate; 20. Stirring support rod; 21. Servo motor; 22. Engaging vertical plate; 23. Limiting slide; 24. Outer mold sleeve; 25. Mold core; 26. Buckle; 27. Center opening; 28. Fixing insert; 29. Center mold sleeve; 30. Fixing connecting block; 31. Connecting support rod; 32. Enclosed 3. Slot; 33. Fixing groove; 34. Adsorption groove; 35. Sealing ring; 36. Fixing fitting block; 37. Temperature detector; 38. Flow rate detector; 39. Adsorption magnet; 40. Elastic block; 41. Small motor; 42. Micro opening; 43. Positioning groove; 44. Positioning rod; 45. Air inlet duct; 46. Air outlet duct; 47. Refrigeration frame; 48. Heat absorption slot; 49. Liquid filling port; 50. Side air slot; 51. Drive motor; 52. Cold liquid storage tank; 53. Exhaust fan; 54. Driven plate; 55. Connecting block; 56. Limiting protrusion; 57. Driven slide; 58. Connecting rod; 59. Limiting plate; 60. Pressing plate; 61. Auxiliary trigger switch; 62. Main trigger switch. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0016] Example 1: Please refer to Figures 1 to 13 A porous extrusion microchannel flat tube die and a preparation method thereof, comprising: The base plate 1 has two fixed side plates 3 on its upper surface, and a mold mechanism is also provided on its upper surface. The mold mechanism includes a sliding assembly and a molding assembly. The sliding assembly includes: a sliding base plate 2, which is provided on the upper surface of the base plate 1. The upper surface of the base plate 1 is provided with a sliding groove 4 for facilitating the sliding of the sliding base plate 2. A sliding vertical plate 6 is provided on both sides of the sliding base plate 2. A side connecting plate 18 is provided on one side surface of the sliding vertical plate 6. A telescopic motor 16 is provided on the upper surface of the fixed side plate 3. The end of the output shaft of the telescopic motor 16 is connected to one side surface of the side connecting plate 18. The bottom surface of the vertical plate 6 is provided with a protrusion that cooperates with the sliding groove 4, the upper surface of the sliding base plate 2 is provided with a servo motor 21, and a bidirectional threaded rod is provided on the output end of the servo motor 21. The upper surface of the sliding base plate 2 is also provided with a movable meshing vertical plate 22, and the upper surface of the sliding base plate 2 is also provided with a limiting slide groove 23 that facilitates the sliding of the meshing vertical plate 22. A threaded hole for meshing with the bidirectional threaded rod is provided at the center of the meshing vertical plate 22. The upper surfaces of the two meshing vertical plates 22 are respectively provided with a sliding main plate 7 and a sliding sub-plate 17. The upper surface of the sliding vertical plate 6 is provided with a sliding groove 8 that facilitates the sliding of the sliding main plate 7 and the sliding sub-plate 17. When in use, the sliding assembly is used to assemble and disassemble the molding assembly, so as to improve the efficiency of the installation work before use and the cleaning work after use of the molding assembly. Before working, the staff first anchors the connecting flange 15 at the output port of the extruder, and the main mounting frame 9 and the auxiliary mounting frame 14 are in a non-fitted state. At this time, the staff separates the buckles 26 on the side surfaces of the two rotating clamping plates 11 from the main mounting frame 9 or the auxiliary mounting frame 14 below, and then installs the outer mold sleeve 24 on the top of the main mounting frame 9 through the combination of the fixing insert 28 and the mounting groove, and the center mold sleeve 29 is also installed on the top of the auxiliary mounting frame 14 in this way. Then, the servo motor 21 is driven to start by the staff signal, and the double The meshing effect of the threaded rod and the two meshing vertical plates 22 makes the two sub-mounting frames 14 gradually approach the main mounting frame 9 and finally fit together. The sub-positioning plate 13 and the main positioning plate 12 are judged by the cooperation of the positioning groove 43 and the positioning rod 44 to determine whether the offset occurs. When the sub-mounting frame 14 and the main mounting frame 9 are completely fitted, the positioning rod 44 is inserted into the inside of the positioning groove 43, and the sub-positioning plate 13 and the main positioning plate 12 are also fitted accordingly. The mold core 25 is now located at the center of the center opening 27. During the sliding process of the sub-mounting frame 14 and the main mounting frame 9, the bottom surfaces on both sides slide inside the sliding groove 8. After the outer mold sleeve 24 and the center connecting plate 19 are installed and combined, the staff drives the telescopic The motor 16 contracts. As the telescopic motor 16 contracts, the sliding base plate 2 slides with the forming assembly above the base plate 1, and finally one side of the central mold sleeve 29 is engaged with the connecting flange 15. The sealing ring 35 on the side surface of the connecting flange 15 is inserted into the inside of the closed slot 32. The fixing fitting block 36 at the center of the connecting flange 15 is also engaged with the fixing connecting block 30 after entering the inside of the central mold sleeve 29. The two elastic blocks 40 are engaged with the fixing connecting blocks 30 on the upper and lower surfaces of the fixing connecting block 30. The adsorption groove 34 and the adsorption magnet 39 are also adsorbed and combined to improve the firmness of the connection. When the mold (referring to the auxiliary mounting frame 14 and the main mounting frame 9, which will not be repeated below) is separated, the air supply box 10 slides The main board 7 moves and drives the driven plate 54 to slide on the upper surface of the driven slide groove 57. After sliding for a distance, the driven plate 54 contacts the limiting plate 59. At this time, the main trigger switch 62 is triggered, and the main trigger switch 62 generates a signal to drive the drive motor 51 to rotate, and the drive motor 51 drives the air supply box 10 to rotate between the two sliding main boards 7. After rotating ninety degrees, the refrigeration frame 47 stops rotating by engaging with the limiting protrusion 56. At this time, the cleaning or disassembly and replacement of the outer mold sleeve 24 is no longer restricted by the cleaning component. When the mold moves and resets, the driven plate 54 drives the pressing plate 60 to move through the connecting rod 58. At this time, the auxiliary trigger switch 61 is triggered.The auxiliary trigger switch 61 sends a signal to control the drive motor 51 to rotate and reset, thereby resetting the cleaning assembly. At this time, the extrusion injection molding work can be carried out. By reversing the above method, the center mold sleeve 29 and the outer mold sleeve 24 can be quickly disassembled and assembled. After the manufacturing work is completed, they can be quickly separated to accelerate the internal cooling work and clean the unsolidified metal liquid inside, avoiding the situation where the internal metal liquid solidifies and makes cleaning difficult.

[0017] The molding assembly includes: a sub-mounting frame 14 and a main mounting frame 9, the sub-mounting frame 14 is fixedly mounted on the upper surface of the sliding sub-plate 17, the main mounting frame 9 is fixedly mounted on the upper surface of the sliding main plate 7, the upper surfaces of the sub-mounting frame 14 and the main mounting frame 9 are provided with a rotatable rotating card plate 11, and a rotatable buckle 26 is provided on one side surface of the rotating card plate 11, and a bayonet that matches the buckle 26 is opened on one side surface of the sub-mounting frame 14 and the main mounting frame 9. The connection between the sub-mounting frame 14 and the main mounting frame 9 and the rotating card plate 11 is provided with a rotating shaft, and the upper surfaces of the two rotating card plates 11 are respectively provided with a sub-positioning plate 13 and a main positioning plate 12, and the sub-positioning plate A plurality of positioning grooves 43 are provided on one side surface of 13, a positioning rod 44 is provided on one side surface of the main positioning plate 12 to match the positioning groove 43, an outer mold sleeve 24 is provided on the upper surface of the main mounting frame 9, a central mold sleeve 29 is provided on the upper surface of the auxiliary mounting frame 14, and a fixing insert 28 is provided on the upper and lower surfaces of the outer mold sleeve 24 and the central mold sleeve 29. The upper surfaces of the auxiliary mounting frame 14 and the main mounting frame 9 are provided with mounting grooves that match the fixing insert 28 below. The bottom surfaces of the two rotating card plates 11 are provided with mounting grooves that match the fixing insert 28 above. A central opening 27 is provided at the center of the outer mold sleeve 24, and the center of the central mold sleeve 29 is provided with a fixing insert 28. A fixing connection block 30 is provided at the center, and a mold core 25 that matches the center opening 27 is provided on one side surface of the fixing connection block 30. A fixing groove 33 is provided on the upper and lower surfaces of the mold core 25. An adsorption groove 34 is provided on one side surface of the fixing connection block 30. A plurality of connecting rods 31 are provided on the side surface of the mold core 25. The other end of the connecting rod 31 is connected to the inner side surface of the center mold sleeve 29. A connecting flange 15 is provided on one side surface of the center mold sleeve 29. A sealing ring 35 is provided on one side surface of the connecting flange 15. A closed slot 32 that matches the sealing ring 35 is provided on one side surface of the center mold sleeve 29. The center of the connecting flange 15 is provided at the center of the connecting flange 15. A central connecting plate 19 is provided, an isolation box is provided at the center of the central connecting plate 19, a small motor 41 is provided inside the isolation box, a plurality of stirring rods 20 are provided on the output shaft of the small motor 41, a plurality of micro openings 42 are provided on the surface of the stirring rods 20, a clamping block 36 is provided on one side surface of the central connecting plate 19, a temperature detector 37 and a flow rate detector 38 are provided on the upper and lower surfaces of the clamping block 36, respectively, an elastic block 40 that cooperates with the clamping groove 33 is provided on the upper and lower surfaces of the inner part of the clamping block 36, and an adsorption magnet 39 that cooperates with the adsorption groove 34 is provided on one side surface of the clamping block 36; In the working state, the temperature detector 37 and the flow rate detector 38 are located inside the central mold sleeve 29. When the molten metal passes through, the flow rate and temperature of the molten metal are monitored in real time. After being used many times, the molten metal will form residues inside the mold and solidify. After solidification, the residual molten metal will occupy the internal space of the mold, reducing the flow channel of the molten metal, resulting in a decrease in flow rate. The decrease in flow rate will cause the molten metal to be unevenly distributed in the mold, forming defects such as uneven wall thickness of the flat tube and rough surface. When insufficient flow rate is detected, a signal is generated by the flow rate detector 38 to drive the small motor 41 to start, and the small motor 41 drives the stirring rod 20 to stir the inside of the molten metal. The micro-openings 42 on the surface of the stirring rod 20 can form turbulence, increase the stirring effect, and improve the fluidity of the molten metal through the stirring rod 20, thereby temporarily compensating for the effect of the internal solidified metal blocking the flow rate.

[0018] The mold mechanism also includes a cooling component and a trigger component. The cooling component includes: an air supply box 10, which is located between the two sliding main boards 7. A drive motor 51 is provided at the connection between the air supply box 10 and the sliding main board 7. Side air slots 50 are provided on both side surfaces of the air supply box 10. Two exhaust fans 53 are provided inside the air supply box 10. The output directions of the two exhaust fans 53 are opposite. The upper surfaces of the two exhaust fans 53 are respectively provided with an air inlet pipe 45 and an air outlet pipe 46. A refrigeration frame 47 is provided on the upper surface of the air supply box 10. The inner side surface of the refrigeration frame 47 is provided with a heat-absorbing groove 48. A cold liquid storage tank 52 is also provided inside the air supply box 10. The upper surface of the air supply box 10 is also provided with a liquid injection port 49 that matches the cold liquid storage tank 52. The trigger component includes a trigger platform 5, which is fixedly mounted on the sliding bottom plate 2, a slidable driven plate 54 is provided on the upper surface of the trigger platform 5, a driven slide groove 57 that cooperates with the driven plate 54 is opened on the upper surface of the trigger platform 5, two connecting blocks 55 are provided on one side surface of the driven plate 54, the other end of the connecting block 55 is connected to the one side surface of the sliding main board 7, and a limiting protrusion 56 is provided on one side surface of the connecting block 55. A limiting plate 59 is provided on the upper surface of the trigger platform 5, and an auxiliary trigger switch 61 and a main trigger switch 62 are respectively provided on both sides of the limiting plate 59. There is an electrical connection between the auxiliary trigger switch 61 and the main trigger switch 62 and the driving motor 51. A connecting rod 58 is provided on one side surface of the driven plate 54, and a circular hole is opened on the surface of the limiting plate 59 to facilitate the passage of the connecting rod 58. A pressing plate 60 is provided on the other end surface of the connecting rod 58. The solid metal block formed by the solidification of the residual metal liquid usually has a lower thermal conductivity than the liquid metal, which will hinder the heat from dissipating to the outside of the mold, further aggravating the increase in mold temperature. The high temperature environment may cause excessive growth of metal grains, forming a coarse grain structure, reducing the strength and toughness of the flat tube. The metal will undergo phase change at high temperature. If the cooling rate is uneven, it may cause incomplete phase change or uneven distribution of phase change products, affecting the mechanical properties of the flat tube. When the internal temperature is detected to be too high, a signal is sent through the temperature detector 37 to drive the cooling component to start. The cooling component can ensure that the flat tube is evenly and properly cooled after demolding, avoiding local overheating or overcooling, and reducing the generation of thermal stress and tissue stress. When the temperature is detected to be too high, one of the exhaust fans 53 inside the air supply box 10 is turned on through the side The air trough 50 draws in air from the outside. At this time, the cold liquid storage tank 52 also sprays out the refrigerant stored inside through the spray head at the bottom. After the water mist combines with the air, it enters the interior of the refrigeration frame 47 through the air inlet pipe 45, and is extracted through the air outlet pipe 46 after flowing around the interior of the refrigeration frame 47. It is discharged from the interior of the air supply box 10 through the side air trough 50 on the other side of the air supply box 10 through another exhaust fan 53. During the flow of cold air, the finished flat tube leaving the mold will pass through the interior of the refrigeration frame 47. Through the action of the heat-absorbing slots 48, the cold air can be in uniform contact with the surface of the flat tube during the flow, so as to quickly cool and shape the flat tube, thereby compensating for the fact that the flat tube is not very stable after forming due to the high temperature inside the mold.

[0019] The working principle of the present invention is: When in use, the sliding assembly is used to assemble and disassemble the molding assembly, so as to improve the efficiency of the installation work before use and the cleaning work after use of the molding assembly. Before working, the staff first anchors the connecting flange 15 at the output port of the extruder, and the main mounting frame 9 and the auxiliary mounting frame 14 are in a non-fitted state. At this time, the staff separates the buckles 26 on the side surfaces of the two rotating clamping plates 11 from the main mounting frame 9 or the auxiliary mounting frame 14 below. Subsequently, the outer mold sleeve 24 is installed above the main mounting frame 9 through the combination of the fixing insert 28 and the mounting groove, and the center mold sleeve 29 is also installed in this way. The method is to install it above the auxiliary mounting frame 14. Subsequently, the servo motor 21 is driven by the staff signal to start, and the two auxiliary mounting frames 14 are gradually approached to the main mounting frame 9 through the meshing effect of the bidirectional threaded rod and the two meshing vertical plates 22, and finally fit together. The auxiliary positioning plate 13 and the main positioning plate 12 are matched through the positioning groove 43 and the positioning rod 44 to determine whether the offset occurs. When the auxiliary mounting frame 14 and the main mounting frame 9 are completely fitted together, the positioning rod 44 is inserted into the interior of the positioning groove 43, and the auxiliary positioning plate 13 and the main positioning plate 12 are also fitted together. The mold core 25 is now located at the center opening At the center of 27, during the sliding process of the auxiliary mounting frame 14 and the main mounting frame 9, the bottom surfaces on both sides slide inside the sliding groove 8. After the outer mold sleeve 24 and the center connecting plate 19 are installed and combined, the staff drives the telescopic motor 16 to retract through the signal. As the telescopic motor 16 retracts, the sliding base plate 2 slides with the forming assembly above the base base plate 1, and finally one side of the center mold sleeve 29 is engaged with the connecting flange 15. The sealing ring 35 on the side surface of the connecting flange 15 is inserted into the inside of the closed slot 32, and the clamping fitting block 36 at the center of the connecting flange 15 is also inserted into the center. The interior of the mold sleeve 29 is then engaged with the clamping connection block 30, and the two elastic blocks 40 are engaged with the clamping connection blocks 30 on the upper and lower surfaces of the clamping connection block 30. The adsorption groove 34 and the adsorption magnet 39 are also adsorbed and combined to improve the firmness of the connection. At this time, the extrusion injection molding work can be carried out. By reversely operating the above method, the central mold sleeve 29 and the outer mold sleeve 24 can be quickly disassembled and assembled. After the manufacturing work is completed, they can be quickly separated to accelerate the internal cooling work and clean the unsolidified metal liquid inside to avoid the situation where the internal metal liquid solidifies and causes cleaning difficulties. In the working state, the temperature detector 37 and the flow rate detector 38 are located inside the central mold sleeve 29. When the metal liquid passes through, the flow rate and temperature of the metal liquid are monitored in real time. After being used many times, the metal liquid will form residues inside the mold and solidify. After solidification, the residual metal liquid will occupy the internal space of the mold, reducing the flow channel of the metal liquid, resulting in a decrease in flow rate. The decrease in flow rate will cause the metal liquid to be unevenly distributed in the mold, forming defects such as uneven wall thickness of the flat tube and rough surface. When insufficient flow rate is detected, a signal is generated by the flow rate detector 38 to drive the small motor 41 to start, and the small motor 41 drives the stirring support rod 20 to move in the metal. The liquid is stirred inside, and the micro-openings 42 on the surface of the stirring support rod 20 can form turbulence, which increases the stirring effect. The stirring support rod 20 improves the fluidity of the metal liquid, thereby temporarily compensating for the effect of the internal solidified metal blocking the flow rate. The solid metal block formed by the solidification of the residual metal liquid usually has a lower thermal conductivity than the liquid metal, which will hinder the heat from dissipating to the outside of the mold, further increasing the mold temperature. The high temperature environment may cause excessive growth of metal grains, forming a coarse grain structure, reducing the strength and toughness of the flat tube. The metal will undergo phase change at high temperature. If the cooling rate is uneven, it may lead to incomplete phase change or uneven distribution of phase change products, affecting the mechanical properties of the flat tube. When the internal temperature is detected to be too high, a signal is sent through the temperature detector 37 to drive the cooling component to start. The cooling component can ensure that the flat tube is evenly and properly cooled after being ejected from the mold, avoiding local overheating or overcooling, and reducing the generation of thermal stress and tissue stress. When the temperature is detected to be too high, one of the exhaust fans 53 inside the air supply box 10 draws air from the outside through the side wind slot 50. At this time, the cold liquid storage tank 52 also sprays the refrigerant stored inside through the spray head at the bottom. After the water mist combines with the air, it enters the interior of the refrigeration frame 47 through the air inlet pipe 45. , and after flowing through the interior of the refrigeration frame 47 for a circle, it is extracted through the air outlet pipe 46, and is discharged from the interior of the air supply box 10 through the side air slot 50 on the other side of the air supply box 10 through another exhaust fan 53. During the flow of cold air, the flat tube finished product coming out of the mold will pass through the interior of the refrigeration frame 47. Through the action of the heat-absorbing slots 48, the cold air can be in uniform contact with the surface of the flat tube during the flow, so as to quickly cool and shape the flat tube, thereby compensating for the fact that the flat tube is not stable after molding due to the high temperature inside the mold.

[0020] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-hole extrusion microchannel flat tube die, comprising: A base plate, wherein two fixed side plates are provided on the upper surface of the base plate, and a mold mechanism is further provided on the upper surface of the base plate, wherein the mold mechanism includes a sliding assembly and a molding assembly, and the sliding assembly includes: a sliding base plate, wherein the sliding base plate is provided on the upper surface of the base plate, and a sliding groove is provided on the upper surface of the base plate to facilitate the sliding of the sliding base plate, and a sliding vertical plate is provided on both side surfaces of the sliding base plate, and a side connecting plate is provided on one side surface of the sliding vertical plate, and a telescopic motor is provided on the upper surface of the fixed side plate, and the output shaft end of the telescopic motor is connected to one side surface of the side connecting plate; The molding assembly includes: a sub-mounting frame and a main mounting frame, the sub-mounting frame is fixedly mounted on the upper surface of the sliding sub-plate, the main mounting frame is fixedly mounted on the upper surface of the sliding main plate, the upper surfaces of the sub-mounting frame and the main mounting frame are both provided with a rotatable rotating clamping plate, one side surface of the rotating clamping plate is provided with a rotatable buckle, one side surface of the sub-mounting frame and the main mounting frame is provided with a bayonet matching the buckle, the connection between the sub-mounting frame and the main mounting frame and the rotating clamping plate is provided with a rotating shaft, the upper surfaces of the two rotating clamping plates are respectively provided with a sub-positioning plate and a main positioning plate, the upper surface of the main mounting frame is provided with an outer mold sleeve, and the upper surface of the sub-mounting frame is provided with a center mold sleeve.

2. The multi-hole extrusion microchannel flat tube die according to claim 1, characterized in that: A servo motor is provided on the upper surface of the sliding base plate, and a bidirectional threaded rod is provided on the output end of the servo motor. A movable engaging vertical plate is also provided on the upper surface of the sliding base plate, and a limiting slide groove is also provided on the upper surface of the sliding base plate to facilitate the sliding of the engaging vertical plate. A threaded hole engaged with the bidirectional threaded rod is provided at the center of the engaging vertical plate, and a sliding main plate and a sliding sub-plate are respectively provided on the upper surfaces of the two engaging vertical plates. A sliding groove is provided on the upper surface of the sliding vertical plate to facilitate the sliding of the sliding main plate and the sliding sub-plate.

3. The multi-hole extrusion microchannel flat tube die according to claim 1, characterized in that: A plurality of positioning grooves are provided on one side surface of the auxiliary positioning plate, a positioning rod matching the positioning grooves is provided on one side surface of the main positioning plate, fixing inserts are provided on the upper and lower surfaces of the outer mold sleeve and the central mold sleeve, mounting grooves matching the fixing inserts below are provided on the upper surfaces of the auxiliary mounting frame and the main mounting frame, and mounting grooves matching the fixing inserts above are provided on the bottom surfaces of the two rotating clamping plates.

4. The multi-hole extrusion microchannel flat tube die according to claim 3, characterized in that: A central opening is provided at the center of the outer mold sleeve, a fixing connection block is provided at the center of the central mold sleeve, a mold core matching the central opening is provided on one side surface of the fixing connection block, fixing grooves are provided on the upper and lower surfaces of the mold core, an adsorption groove is provided on one side surface of the fixing connection block, a plurality of connecting rods are provided on the side surface of the mold core, and the other end of the connecting rod is connected to the inner side surface of the central mold sleeve.

5. The multi-hole extrusion microchannel flat tube die according to claim 3, characterized in that: A connecting flange is provided on one side surface of the central mold sleeve, a sealing ring is provided on one side surface of the connecting flange, a closed slot matching the sealing ring is provided on one side surface of the central mold sleeve, a central connecting plate is provided at the center of the connecting flange, an insulating box is provided at the center of the central connecting plate, a small motor is provided inside the insulating box, a plurality of stirring rods are provided on the output shaft of the small motor, a plurality of micro openings are provided on the surface of the stirring rods, a fixing block is provided on one side surface of the central connecting plate, a temperature detector and a flow rate detector are provided on the upper and lower surfaces of the fixing block respectively, an elastic block matching the fixing groove is provided on the upper and lower surfaces of the inner part of the fixing block, and an adsorption magnet matching the adsorption groove is provided on one side surface of the fixing block.

6. The multi-hole extrusion microchannel flat tube die according to claim 1, characterized in that: The mold mechanism also includes a cooling component and a trigger component, and the cooling component includes: an air supply box, the air supply box is located between two sliding main boards, a driving motor is provided at the connection between the air supply box and the sliding main board, side air slots are provided on both side surfaces of the air supply box, two exhaust fans are provided inside the air supply box, the output directions of the two exhaust fans are opposite, and the upper surfaces of the two exhaust fans are respectively provided with air inlet pipes and air outlet pipes, a refrigeration frame is provided on the upper surface of the air supply box, and a heat-absorbing groove is provided on the inner side surface of the refrigeration frame, a cold liquid storage tank is also provided inside the air supply box, and a liquid injection port that matches the cold liquid storage tank is also provided on the upper surface of the air supply box.

7. The multi-hole extrusion microchannel flat tube die according to claim 6, characterized in that: The cam is fixedly mounted on the upper surface of the sliding base plate, the upper surface of the trigger platform is provided with a driven plate body which is slidable thereon, the upper surface of the trigger platform is provided with a driven slide groove which cooperates with the driven plate body, one side surface of the driven plate body is provided with two connecting blocks, the other end of the connecting block is connected to the one side surface of the sliding main board, one side surface of the connecting block is provided with a limiting protrusion, the upper surface of the trigger platform is provided with a limiting plate body, the two side surfaces of the limiting plate body are respectively provided with an auxiliary trigger switch and a main trigger switch, the auxiliary trigger switch is electrically connected to the main trigger switch and the driving motor, one side surface of the driven plate body is provided with a connecting rod, the surface of the limiting plate body is provided with a circular hole for the connecting rod to pass through, and the other end surface of the connecting rod is provided with a pressing plate body.

8. A method for preparing a multi-porous extruded micro-channel flat tube, used for a multi-porous extruded micro-channel flat tube die according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: During the mold assembly phase, the worker first anchors the connecting flange to the output port of the extruder to ensure a stable connection between the mold and the extruder. Subsequently, the buckles on the side surfaces of the two rotating clamps are separated from the main mounting frame or auxiliary mounting frame below to facilitate the subsequent installation of the outer mold sleeve and the center mold sleeve. S2: Install the outer mold sleeve and the center mold sleeve. Install the outer mold sleeve on the top of the main mounting frame by combining the fixing inserts with the mounting slots. Install the center mold sleeve on the top of the auxiliary mounting frame in the same way. S3: Start the servo motor. Through the meshing effect of the bidirectional threaded rod and the two meshing vertical plates, the auxiliary mounting frame and the main mounting frame are gradually brought closer and finally fit together. At the same time, the positioning grooves and positioning rods between the auxiliary positioning plate and the main positioning plate ensure that there is no deviation. The mold core is now located at the center of the center opening. S4: Start the telescopic motor. As the telescopic motor contracts, the sliding base plate slides with the forming assembly above the base plate, eventually engaging one side of the center mold sleeve with the connecting flange. The sealing ring on the side surface of the connecting flange is inserted into the closed slot to enhance the firmness of the connection. S5: During the extrusion injection molding stage, molten metal is injected into the mold. The temperature detector and flow rate detector in the mold mechanism monitor the flow rate and temperature of the molten metal in real time. If the flow rate is insufficient, a small motor is started to stir the molten metal through the stirring rod to increase its fluidity and ensure its uniform distribution in the mold. S6: Cooling and shaping stage: When the temperature inside the mold is detected to be too high, the cooling component is activated. The air supply box, exhaust fan and refrigeration frame generate cold air to evenly cool the flat tube, ensuring that the flat tube can be quickly cooled and shaped after being ejected from the mold. S7: Mold disassembly and cleaning stage. After the extrusion injection molding is completed, the center mold sleeve and the outer mold sleeve are quickly disassembled and assembled through the reverse operation of the sliding assembly, and the inside of the mold is cleaned to avoid cleaning difficulties caused by the solidification of the molten metal.

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