Inverted liquid metal printing device and method

Abstract

The invention provides an inverted liquid metal printing device and method, and mainly relates to the field of liquid metal printing equipment. The invention discloses an inverted liquid metal printing device and method. The device has the beneficial effects that the high-low-temperature cooling printing platform is inversely arranged on the upper portion and does reciprocating motion, the auxiliary hanging head is installed on the cooling face of the platform to increase the connecting force and prevent a printed piece from falling off, the molten aluminum molten pool is arranged on the lower portion, the molten aluminum collecting box is arranged on the side face of the molten pool, and the impact spray head is arranged at the bottom of the molten pool; the high-low temperature control platform downwards abuts against a molten pool, jet flow is jetted to the high-low temperature control platform, printing is started, the whole equipment is protected by inert gas, an inverted printing mode can enable impact to act on a pasty area all the time in the printing process, the impact effect is strengthened, high-temperature molten aluminum is located below the pasty area, and a high temperature gradient can be established; equiaxed crystal formation of ingot blanks is facilitated, and the quality of the ingot blanks is improved.

Description

Technical Field

[0001] This invention relates primarily to the field of liquid metal printing equipment, specifically an inverted liquid metal printing device and method. Background Technology

[0002] Currently in the metallurgical field, the smelting of metals (such as ferroalloys or metallic silicon) involves casting from a liquid to a solid state. This process involves pouring molten metal into a fixed cast iron ingot mold using a ladle, allowing it to cool and solidify naturally into a solid block of a certain thickness. This process is time-consuming and difficult to demold. Therefore, a technology has emerged that uses liquid metal stacking and printing to form metal blocks. Existing liquid metal printing methods mostly involve downward spraying, with a metal jet above and a cooling platform below. The cooling and solidification of the ingot relies on the bottom of the ingot. As the printing height increases and the amount of molten metal increases, the cooling efficiency decreases rapidly, significantly reducing the solidification rate. This can easily lead to segregation and an increase in the width of the two-phase region, affecting the quality of the printed ingot, limiting the application of the printing method, and hindering the promotion of melt impact printing. Summary of the Invention

[0003] The purpose of this invention is to provide an inverted liquid metal printing apparatus and method to solve the problems mentioned in the background art.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: An inverted liquid metal printing device includes a molten pool shell, a molten pool liner fixedly provided on the inner surface of the molten pool shell, a pressurized aluminum liquid nozzle fixedly connected to the bottom center of the molten pool shell, a nozzle liner fixedly provided on the inner surface of the pressurized aluminum liquid nozzle, a nozzle platform fixedly provided inside the molten pool shell at a position corresponding to the pressurized aluminum liquid nozzle, a molten pool liner groove formed around the nozzle platform, a plurality of nozzle holes arranged at equal intervals on both sides of the upper part of the nozzle platform and penetrating the nozzle liner, a positioning groove formed around the inside of the nozzle holes, a nozzle tube provided inside the nozzle holes, a positioning ring fixedly provided on the outer periphery of the nozzle tube and installed inside the positioning groove, an aluminum liquid delivery pipe fixedly connected to one side of the pressurized aluminum liquid nozzle, an aluminum liquid generating and pressurizing device provided outside the aluminum liquid delivery pipe, the output end of the aluminum liquid generating and pressurizing device fixedly connected and communicating with the aluminum liquid delivery pipe, and heating pipe holes formed on both sides of the front part of the molten pool shell, with a heating pipe detachably provided inside the heating pipe holes. As a preferred embodiment of the present invention, slide rail column support frames are fixedly provided on both sides of the outer shell of the molten pool, and slide rail columns are fixedly connected between the slide rail column support frames at corresponding positions. Slide rail sleeves are fitted around the outer periphery of the slide rail columns on both sides and slidably connected thereto. Moving plates are fixedly connected to the lower part of the slide rail sleeves on both sides. A threaded column motor support plate is fixedly connected between the slide rail column support frames on one side. A threaded column motor is fixedly connected to the outer side of the threaded column motor support plate. A threaded column connecting plate is fixedly connected between the slide rail column support frames on the other side. A threaded column is provided on the inner side of the threaded column connecting plate and rotatably connected thereto. The end of the threaded column is fixedly coaxially connected to the rotating end of the threaded column motor. A threaded movable sleeve is fitted around the outer periphery of the threaded column and threadedly engaged thereto and fixedly connected to the moving plate. Lifting hydraulic cylinders are fixedly connected to the four corners of the lower part of the moving plate. A limit plate is fixedly connected to the output end of the lifting hydraulic cylinder.

[0005] As a preferred embodiment of the present invention, a high and low temperature control platform is provided inside the outer shell of the molten pool. A limiting plate groove seat is fixedly provided at the upper part of the high and low temperature control platform corresponding to the output end of the lifting hydraulic cylinder, which can be sleeved on the outer periphery of the limiting plate. A limiting plate fixing block is provided on one side of the limiting plate groove seat. A bolt seat is fixedly provided on the outer side of the limiting plate fixing block. A fixing bolt is provided inside the bolt seat, which can be bolted to the high and low temperature control platform. A plurality of through holes are opened through the surface of the high and low temperature control platform. A bolt rod is provided inside the through holes. An auxiliary suspension head is fixedly provided at the lower part of the bolt rod. A nut is sleeved on the outer periphery of the upper part of the bolt rod and threadedly connected to it.

[0006] As a preferred embodiment of the present invention, a flow channel hole is provided on one side of the outer shell of the molten pool and penetrates the inner lining of the molten pool. A flow channel is fixedly provided on the outer side of the outer shell of the molten pool at a position corresponding to the flow channel hole, and a collection channel is fixedly provided on the outer side of the flow channel and communicates with it.

[0007] A method for printing inverted liquid metal, comprising printing using an inverted liquid metal printing apparatus as described in claim 1, wherein the inverted liquid metal printing method includes: S1: The aluminum raw material is melted into a solution by the aluminum liquid generating pressurization equipment and the aluminum solution is further pressurized and transported into the pressurized aluminum liquid nozzle. The solution is then evenly sprayed out by each of the nozzles onto the lower surface of the high and low temperature control platform for printing. S2: The aluminum liquid is sprayed and simultaneously rotated by the threaded column, which drives the threaded moving sleeve that is threaded to it to move, thereby driving the moving plate to move and simultaneously driving the high and low temperature control platform, so that the aluminum liquid is evenly sprayed and printed on the bottom of the high and low temperature control platform, and the thickness of the aluminum liquid can be increased by the reciprocating motion of the high and low temperature control platform. S3: After the printing thickness is increased, the lifting hydraulic cylinder is contracted to drive the high and low temperature control platform to rise and reciprocate at the same time to further increase the printing thickness until the printing is completed; S4: Printing is completed by unloading the bolt rod and the auxiliary suspension head to detach the printed metal block from the bottom of the high and low temperature control platform.

[0008] Compared with the prior art, the beneficial effects of the present invention are: 1. An inverted liquid metal printing method involves an inverted high-low temperature cooling printing platform positioned above and reciprocating. An auxiliary suspension head is installed on the cooling surface of the platform to increase connection force and prevent the printed part from falling. Below is a molten aluminum pool, with an aluminum collection box on the side. Impact nozzles are positioned at the bottom of the pool. At the start of printing, the high-low temperature control platform moves downwards towards the molten pool, and the jet is sprayed onto the platform, initiating printing. The entire device is protected by an inert gas atmosphere. This inverted printing method ensures that the impact consistently acts on the slurry zone during printing, enhancing the impact effect. The high-temperature aluminum liquid below the slurry zone creates a high temperature gradient, which is beneficial for the formation of equiaxed crystals in the ingot, improving ingot quality. Simultaneously, excess unsolidified aluminum liquid returns to the molten pool without increasing the burden on the high-low temperature control board, allowing for concentrated cooling of the slurry zone, more thorough cooling, and improved cooling efficiency during printing, making the molten metal easier to form. 2. By setting up a flexible and movable high and low temperature control platform, the device can freely adjust its position and orientation within the inert gas-protected equipment space. This allows for flexible control over the size, shape, and other specifications of the printed metal block, breaking the limitations imposed by fixed platforms on the specifications of the printed parts. Simultaneously, the platform adopts a flexible and detachable structural design. After printing, the high and low temperature control platform can be removed from the equipment along with the printed metal block, avoiding damage to the metal block during removal using traditional fixed platforms and greatly facilitating subsequent detachment operations. During the detachment process of the metal block from the platform, the platform temperature can be appropriately increased to reduce the adhesion between the metal block and the platform, aiding in smooth demolding and further ensuring the integrity of the printed parts. This complements the advantages of inverted printing, which enhances impact and improves cooling efficiency, jointly optimizing the printing process and the quality of the finished product. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the molten pool shell structure of the present invention; Figure 5 This is a schematic diagram of the high and low temperature control platform structure of the present invention; Figure 6 This is a schematic diagram of the movable plate structure of the present invention; Figure 7 This is a schematic diagram of the high and low temperature control platform structure of the present invention; Figure 8 This is a schematic diagram of the heating tube structure of the present invention.

[0010] The following are the reference numerals in the attached diagram: 1. Molten pool outer shell; 2. Molten pool inner lining; 3. Pressurized aluminum molten metal nozzle; 4. Nozzle inner lining; 5. Nozzle head platform; 6. Molten pool inner lining groove; 7. Nozzle head orifice; 8. Positioning groove; 9. Nozzle head pipe; 10. Positioning ring; 11. Aluminum molten metal conveying pipe; 12. Aluminum molten metal generating and pressurizing equipment; 13. Heating pipe orifice; 14. Heating pipe; 15. Slide rail column support frame; 16. Slide rail column; 17. Slide rail sleeve; 18. Moving plate; 19. Threaded column. 20. Motor support plate; 21. Threaded column motor; 22. Threaded column connecting plate; 23. Threaded column; 24. Threaded moving sleeve; 25. Lifting hydraulic cylinder; 26. Limiting plate; 27. High and low temperature control platform; 28. Limiting plate slot seat; 29. ​​Limiting plate fixing block; 30. Bolt seat; 31. Fixing bolt; 32. Through hole; 33. Bolt rod; 34. Auxiliary suspension head; 35. Nut; 36. Drainage groove hole; 37. Drainage groove; 38. Collection groove. Detailed Implementation

[0011] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0012] For details, please refer to the following: Figure 1-48. An inverted liquid metal printing device includes a molten pool shell 1, a molten pool liner 2 fixedly disposed on the inner surface of the molten pool shell 1, a pressurized aluminum liquid nozzle 3 fixedly connected to the bottom center of the molten pool shell 1, and a nozzle liner 4 fixedly disposed on the inner surface of the pressurized aluminum liquid nozzle 3. The molten pool liner 2 and the nozzle liner 4 provide high-temperature isolation protection for the molten pool shell 1 and the pressurized aluminum liquid nozzle 3. A nozzle platform 5 is fixedly disposed inside the molten pool shell 1 at a position corresponding to the pressurized aluminum liquid nozzle 3. A molten pool liner groove 6 is formed around the nozzle platform 5. The molten pool liner 2 is installed into the molten pool liner groove 6 to make the molten pool liner 2 fit more closely to the nozzle platform 5. To enhance its heat preservation performance, several nozzle tube holes 7 are evenly spaced on both sides of the upper part of the nozzle tube platform 5 and penetrate the inner lining 4 of the nozzle tube. Positioning grooves 8 are formed around the inside of the nozzle tube holes 7. A nozzle tube 9 is provided inside the nozzle tube hole 7. A positioning ring 10 is fixedly installed on the outer periphery of the nozzle tube 9 and installed inside the positioning groove 8. An aluminum liquid conveying pipe 11 is fixedly connected to one side of the pressurized aluminum liquid spray pipe 3. An aluminum liquid generating pressurizing device 12 is provided on the outside of the aluminum liquid conveying pipe 11. The output end of the aluminum liquid generating pressurizing device 12 is fixedly connected to and communicates with the aluminum liquid conveying pipe 11. Heating tube holes 13 are formed on both sides of the front part of the molten pool shell 1. A heating tube 14 is detachably provided inside the heating tube hole 13.

[0013] In some embodiments, the metal material is melted by the aluminum liquid generating and pressurizing device 12 and pressurized, and then input into the pressurized aluminum liquid spray pipe 3 through the aluminum liquid delivery pipe 11. It is then sprayed by each of the nozzle pipes 9. At the same time, the heating pipe 14 is set to heat both sides of each of the nozzle pipes 9, thereby improving the fluidity of the internal metal liquid and reducing the occurrence of blockage.

[0014] In some embodiments, the spray area is changed by altering the number and position of different nozzle tubes 9, thereby changing the length specification of the printed metal block, or the metal density of the printed metal block is changed by controlling the density of different nozzle tubes 9.

[0015] For details, please refer to the following: Figure 1-46. Slide rail column support frames 15 are fixedly provided on both sides of the outer shell 1 of the molten pool. Slide rail columns 16 are fixedly connected between the slide rail column support frames 15 at corresponding positions. Slide rail sleeves 17 are fitted around the outer periphery of the slide rail columns 16 on both sides and are slidably connected to them. Moving plates 18 are fixedly connected to the lower part of the slide rail sleeves 17 on both sides. Threaded column motor support plates 19 are fixedly connected between the slide rail column support frames 15 on one side. Threaded column motors 20 are fixedly connected to the outer side of the threaded column motor support plates 19. Threaded column connecting plates 21 are fixedly connected between the slide rail column support frames 15 on the other side. Threaded columns 22 are provided on the inner side of the threaded column connecting plates 21 and are rotatably connected to them. The end of the threaded column 22 is fixedly coaxially connected to the rotating end of the threaded column motor 20. Threaded moving sleeves 23 are fitted around the outer periphery of the threaded column 22 and are threadedly engaged with it and fixedly connected to the moving plates 18. Lifting hydraulic cylinders 24 are fixedly connected to the four corners of the lower part of the moving plates 18. Limiting plates 25 are fixedly connected to the output end of the lifting hydraulic cylinders 24.

[0016] In some embodiments, the movable plate 18 is slidably connected to the upper part of the sliding plate 18 by the slide rail columns 16 on both sides. The movable plate 18 is moved by the rotation control of the threaded column motor 20. The movable plate 18 is connected to the high and low temperature control platform 26 by the lifting hydraulic cylinder 24 at the bottom of the movable plate 18. The movement of the movable plate 18 moves the high and low temperature control platform 26 and changes the lifting height of the high and low temperature control platform 26 by the extension and retraction of the lifting hydraulic cylinder 24. In turn, the metal flow is evenly sprayed layer by layer to the bottom of the high and low temperature control platform 26 in conjunction with the nozzle pipe 9.

[0017] For details, please refer to the following: Figure 5-7 The outer shell 1 of the molten pool is provided with a high and low temperature control platform 26. The upper part of the high and low temperature control platform 26 is fixed with a limiting plate slot seat 27 corresponding to the output end of the lifting hydraulic cylinder 24, which can be sleeved on the outer periphery of the limiting plate 25. A limiting plate fixing block 28 is provided on one side of the limiting plate slot seat 27. A bolt seat 29 is fixed on the outer side of the limiting plate fixing block 28. A fixing bolt 30 is provided inside the bolt seat 29, which can be bolted to the high and low temperature control platform 26. Several through holes 31 are opened through the surface of the high and low temperature control platform 26. A bolt rod 32 is provided inside the through holes 31. An auxiliary suspension head 33 is fixed at the lower part of the bolt rod 32. A nut 34 is sleeved on the outer periphery of the upper part of the bolt rod 32 and threadedly connected to it.

[0018] In some embodiments, the limiting plate slot seat 27 is sleeved on the outer periphery of the limiting plate 25 and the limiting plate fixing block 28 fixes the limiting plate 25 to the upper part of the high and low temperature control platform 26. Furthermore, the high and low temperature control platform 26 can be disassembled from the bottom of the lifting hydraulic cylinder 24 by removing the limiting plate fixing block 28, thereby facilitating the demolding of the metal block. The auxiliary suspension head 33 enhances the adhesion of the metal and is detachably connected to the high and low temperature control platform 26 by the bolt rod 32, further enabling the printed metal block to carry the auxiliary suspension head 33 and separate from the bottom of the high and low temperature control platform 26.

[0019] For details, please refer to the following: Figure 1-4 The outer shell 1 of the molten pool has a flow channel hole 35 on one side and penetrates the inner lining 2 of the molten pool. A flow channel 36 is fixedly provided on the outer side of the molten pool shell 1 at a position corresponding to the flow channel hole 35. A collection channel 37 is fixedly provided on the outer side of the flow channel 36 and communicates with it.

[0020] In some embodiments, molten metal that has not solidified in time and has fallen is guided from inside the molten pool shell 1 to inside the collection tank 37 through the drainage slot 35 for collection, thereby completing the collection of molten aluminum.

[0021] This application also provides a method for printing inverted liquid metal, using an inverted liquid metal printing device as described in claim 1, wherein the inverted liquid metal printing method includes: S1: The aluminum raw material is melted into a solution by the aluminum liquid generating pressurizing device 12 and pressurized to be transported into the pressurized aluminum liquid nozzle 3 and evenly sprayed out by each of the nozzles 9 to the lower surface of the high and low temperature control platform 26 for printing; S2: The aluminum liquid is sprayed and simultaneously rotated by the threaded column 22, which drives the threaded moving sleeve 23 that is threaded with it to move, thereby driving the moving plate 18 to move and simultaneously driving the high and low temperature control platform 26, so that the aluminum liquid is evenly sprayed and printed on the bottom of the high and low temperature control platform 26, and the thickness of the aluminum liquid can be increased by the reciprocating motion of the high and low temperature control platform 26. S3: After the printing thickness is increased, the lifting hydraulic cylinder 24 is retracted to drive the high and low temperature control platform 26 to rise and reciprocate at the same time to further increase the printing thickness until printing is completed; S4: Printing is completed by unloading the bolt rod 32 and the auxiliary suspension head 33 to detach the printed metal block from the bottom of the high and low temperature control platform 26.

[0022] The aforementioned inverted liquid metal printing method involves inverting the high-low temperature control platform 26 to spray liquid metal onto its bottom for printing. The platform generates a low temperature that accelerates the solidification of the liquid metal, and any unsolidified liquid flows down, ensuring that the impact during printing consistently acts on the slurry area, thus enhancing the impact effect. Below the slurry area is high-temperature molten aluminum, creating a high temperature gradient that promotes equiaxed crystal formation in the ingot and improves ingot quality. The high-low temperature control platform 26, which can move flexibly and be raised and lowered, can coordinate with the various nozzles 9 to achieve the desired liquid metal printing effect. The metal block is evenly laid on the bottom of the high and low temperature control platform 26. The height of the high and low temperature control platform 26 is further controlled to ensure that the nozzle tube 9 is always at the same distance from the solidification surface of the metal ingot, thereby ensuring that the spraying intensity and uniformity remain consistent. After printing, the high and low temperature control platform 26 is disengaged from the lifting hydraulic cylinder 24, and the printed metal block is detached from the bottom of the high and low temperature control platform 26 by unloading each of the bolt rods 32 and the auxiliary suspension head 33. The temperature of the high and low temperature control platform 26 is appropriately increased to make it easier for the printed metal block to detach from its bottom surface.

[0023] This solution also includes a controller, the location of which is set by the operator according to the actual situation during operation. The controller is used to control the electrical components used in this solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, displays, computer input devices, switches, communication devices, lights, speakers, and microphones. The controller is an Intel processor, AMD processor, PLC controller, ARM processor, or microcontroller. It is used in conjunction with a motherboard, memory modules, storage media, and power supply, which is AC power or a lithium battery. When a display screen is provided, a graphics card is also included. For the operating principle of the controller, please refer to "Principles of Automatic Control," "Microcontroller Principles and Application Simulation Cases," and "Sensor Principles and Applications" published by Tsinghua University Press. Other books in this field can also be consulted. Other automation control and electrical components not mentioned are knowledge well known to those skilled in the art and will not be described in detail here.

[0024] In explaining this invention, it should be noted that the terms indicating location are used only for ease of description and understanding, and are not intended to limit the installation location of specific technical features. Other possible installation methods are not excluded.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inverted liquid metal printing device, comprising a molten pool shell (1), characterized in that: The inner surface of the molten pool shell (1) is fixedly provided with a molten pool liner (2). A pressurized aluminum liquid nozzle (3) is fixedly connected to the bottom center of the molten pool shell (1). A nozzle liner (4) is fixedly provided on the inner surface of the pressurized aluminum liquid nozzle (3). A nozzle platform (5) is fixedly provided inside the molten pool shell (1) at a position corresponding to the pressurized aluminum liquid nozzle (3). A molten pool liner groove (6) is opened around the nozzle platform (5). Several nozzle holes (7) are arranged at equal intervals on both sides of the upper part of the nozzle platform (5) and penetrate the nozzle liner (4). Positioning features are opened around the nozzle holes (7). The groove (8) has a nozzle tube (9) inside the nozzle tube hole (7). A positioning ring (10) is fixedly installed on the outer periphery of the nozzle tube (9) inside the positioning groove (8). An aluminum liquid conveying pipe (11) is fixedly connected to one side of the pressurized aluminum liquid spray pipe (3). An aluminum liquid generating pressurizing device (12) is provided on the outside of the aluminum liquid conveying pipe (11). The output end of the aluminum liquid generating pressurizing device (12) is fixedly connected to and communicates with the aluminum liquid conveying pipe (11). Heating pipe holes (13) are opened on both sides of the front part of the molten pool shell (1). A heating pipe (14) is detachably provided inside the heating pipe hole (13).

2. The inverted liquid metal printing device according to claim 1, characterized in that: The outer shell of the molten pool (1) is fixedly provided with slide rail column support frames (15) on both sides. Slide rail columns (16) are fixedly connected between the slide rail column support frames (15) at corresponding positions. Slide rail sleeves (17) are fitted around the outer periphery of the slide rail columns (16) on both sides and are slidably connected to them. A movable plate (18) is fixedly connected to the lower part of the slide rail sleeves (17) on both sides. A threaded column motor support plate (19) is fixedly connected between the slide rail column support frames (15) on one side. A threaded column motor (20) is fixedly connected to the outer side of the threaded column motor support plate (19). The slide rail column support on the other side is fixedly connected to the slide rail column support frame (15). A threaded column connecting plate (21) is fixedly connected between the support frame (15). A threaded column (22) is provided on the inner side of the threaded column connecting plate (21) and is rotatably connected to it. The end of the threaded column (22) is fixedly connected to the rotating end of the threaded column motor (20) on the same axis. A threaded moving sleeve (23) is provided on the outer circumference of the threaded column (22) and is threadedly engaged with it and fixedly connected to the moving plate (18). A lifting hydraulic cylinder (24) is fixedly connected to the four corners of the lower part of the moving plate (18). A limit plate (25) is fixedly connected to the output end of the lifting hydraulic cylinder (24).

3. The inverted liquid metal printing device according to claim 2, characterized in that: The outer shell (1) of the molten pool is provided with a high and low temperature control platform (26). The upper part of the high and low temperature control platform (26) is fixed with a limiting plate slot seat (27) corresponding to the output end of the lifting hydraulic cylinder (24). It can be sleeved on the outer periphery of the limiting plate (25). A limiting plate fixing block (28) is provided on one side of the limiting plate slot seat (27). A bolt seat (29) is fixed on the outside of the limiting plate fixing block (28). A fixing bolt (30) is provided inside the bolt seat (29) and can be bolted to the high and low temperature control platform (26). Several through holes (31) are opened through the surface of the high and low temperature control platform (26). A bolt rod (32) is provided inside the through hole (31). An auxiliary suspension head (33) is fixed on the lower part of the bolt rod (32). A nut (34) is sleeved on the outer periphery of the upper part of the bolt rod (32) and threadedly connected to it.

4. The inverted liquid metal printing device according to claim 1, characterized in that: The outer shell (1) of the molten pool has a flow channel hole (35) on one side that penetrates the inner lining (2) of the molten pool. A flow channel (36) is fixedly provided on the outer side of the molten pool (1) at a position corresponding to the flow channel hole (35). A collection channel (37) is fixedly provided on the outer side of the flow channel (36) and communicates with it.

5. A method for printing inverted liquid metal, characterized in that: Printing is performed using an inverted liquid metal printing device as described in claim 1, wherein the inverted liquid metal printing method includes: S1: The aluminum raw material is melted into a solution by the aluminum liquid generating pressurizing device (12) and the aluminum solution is further pressurized and transported to the interior of the pressurized aluminum liquid nozzle (3) and evenly sprayed out by each of the nozzles (9) to the lower surface of the high and low temperature control platform (26) for printing; S2: The aluminum liquid is sprayed and rotated by the threaded column (22), which drives the threaded moving sleeve (23) that is threaded with it to move, thereby driving the moving plate (18) to move and driving the high and low temperature control platform (26) to uniformly spray and print the aluminum liquid on the bottom of the high and low temperature control platform (26). The aluminum liquid thickness can be increased by the reciprocating motion of the high and low temperature control platform (26). S3: After the printing thickness is increased, the lifting hydraulic cylinder (24) is contracted to drive the high and low temperature control platform (26) to rise and reciprocate at the same time to further increase the printing thickness until the printing is completed; S4: Printing is completed by unloading the bolt rod (32) and the auxiliary suspension head (33) to detach the printed metal block from the bottom of the high and low temperature control platform (26).

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