Industrial grade inorganic material inkjet 3D printing device

Abstract

The utility model discloses an industrial grade inorganic material inkjet 3D printing device, including operation panel, main body frame, XY direction drive assembly, printing nozzle assembly, forming assembly, powder spreading assembly, waste collection assembly, nozzle cleaning assembly and nozzle wiping assembly, two powder spreading assemblies are located both ends of forming assembly, realizes bidirectional powder spreading, waste collection assembly is located below one end of forming assembly, is used for recycling the powder material of the superfluous in the powder spreading process, and nozzle cleaning assembly and nozzle wiping assembly are located on main body frame and are close to printing nozzle starting point position, are used for cleaning and wiping nozzle, and powder spreading assembly includes feed bin, powder spreading bin, feeding auger, feed shaft, powder spreading scraping roller, scraper and feeding motor, and powder spreading bin is connected with feed bin, and feeding auger is rotatably connected in powder spreading bin, and feed shaft is located just below powder spreading bin discharge gate, and scraper is used for scraping the powder on the surface of powder spreading scraping roller.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing equipment technology, specifically an industrial-grade inorganic material inkjet 3D printing device. Background Technology

[0002] With the continuous development of the manufacturing industry, 3D printing technology, as an emerging manufacturing method, has attracted widespread attention due to its ability to quickly and flexibly manufacture complex structures. Traditional 3D printing technology mainly uses polymer materials, while in the industrial field, the demand for inorganic materials is increasing. For example, in the fields of electronics, optics, and mechanics, inorganic materials play an irreplaceable role due to their excellent mechanical properties, chemical stability, and functionality.

[0003] Inkjet 3D printing involves laying powder material on a forming platform, then spraying a curing agent through a printhead to solidify the powder. After the current layer is sprayed and cured, the forming platform descends to the next layer thickness, and the process of laying powder, spraying, and curing continues, repeating layer by layer until the entire printing process is complete. Inkjet 3D printing has a relatively slow printing speed, making it difficult to meet the needs of large-scale production. Printing complex structures or large parts may take hours or even days. Furthermore, inkjet 3D printing commonly faces the problem of printhead clogging. This can be caused by impurities in the material, improper printhead temperature settings, or the curing agent drying out due to prolonged disuse. Printhead clogging not only affects print quality but can also lead to print failures.

[0004] In summary, developing inkjet 3D printing equipment suitable for industrial-grade inorganic materials can improve the molding quality and efficiency of inkjet 3D printing of industrial-grade inorganic materials. Solving the nozzle clogging problem is of great significance for improving the stability and accuracy of the equipment. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide an industrial-grade inorganic material inkjet 3D printing device.

[0006] The present invention solves the aforementioned technical problem by adopting the following technical solution: An industrial-grade inorganic material inkjet 3D printing device includes an operation panel, a main frame, an XY direction drive assembly, a print head assembly, a forming assembly, a powder spreading assembly, a waste collection assembly, a print head cleaning assembly, and a print head wiping assembly; two powder spreading assemblies are located at both ends of the forming assembly, the waste collection assembly is located below one end of the forming assembly, and the print head cleaning assembly and print head wiping assembly are located on the main frame and close to the starting point of the print head; The powder spreading assembly includes a feeding hopper, a powder spreading hopper, a feeding auger, a feeding shaft, a powder spreading and leveling roller, a scraper, and a feeding motor. The feeding hopper is connected to the main frame and is connected to the powder spreading hopper via a conveying pipe. The powder spreading hopper has powder spreading assembly side plates on both sides, and the lower ends of the two powder spreading assembly side plates are slidably connected to the two sides of the main frame. The feeding auger is rotatably connected inside the powder spreading hopper, and the output shaft of the feeding motor is connected to one end of the feeding auger. The two ends of the feeding shaft are rotatably connected to the upper parts of the two powder spreading assembly side plates and are located directly below the outlet of the powder spreading hopper. The powder spreading and leveling roller is rotatably installed in the middle of the powder spreading assembly side plates and is located behind the feeding shaft. The scraper is connected to the main frame, and when the powder spreading and leveling roller passes overhead, the scraper removes the powder material from the surface of the powder spreading and leveling roller.

[0007] Furthermore, the waste collection assembly includes a waste bin, a waste discharge auger, a waste discharge motor, and a motor connector; the waste bin is located below the molding assembly, the waste discharge auger is rotatably connected inside the waste bin, the waste discharge motor is installed at one end of the waste bin through the motor connector, and the output shaft of the waste discharge motor is connected to one end of the waste discharge auger.

[0008] Furthermore, the nozzle cleaning assembly includes a cleaning section and a water tank lifting section; the cleaning section includes a cleaning working tank, a scraper fixing plate, a rubber scraper, an ultrasonic vibrator, and a micro pump; the cleaning working tank is provided with a scraper fixing plate in the middle, dividing the cleaning working tank into a cleaning water tank and a water storage tank, and the upper part of the scraper fixing plate is provided with an overflow hole; the micro pump is installed at the bottom of the cleaning working tank and is connected to both the cleaning water tank and the water storage tank; the rubber scraper is fixed to the top of the scraper fixing plate, and the ultrasonic vibrator is installed at the bottom of the cleaning water tank.

[0009] Furthermore, the water tank lifting section includes a lifting base plate, a lifting support plate, a lead screw, guide rails, a stepper motor, a lifting upper side cover, a lifting lower side cover, a lifting support plate, and a lifting fixing plate; two lifting support plates are located on both sides of the lifting base plate, the lifting fixing plate is connected to the lifting base plate and the lifting support plate, and the lifting lower side cover is connected to the lifting fixing plate; guide rails are provided on both sides of the lifting support plate, the lifting upper side cover is slidably connected to the guide rails, the lifting support plate is located on top of the lifting upper side cover, and a cleaning operation trough is installed on the lifting support plate; the stepper motor is installed on the top of the lifting fixing plate through a motor fixing plate, the output end of the stepper motor is connected to the lower end of the lead screw, and the upper part of the lead screw is slidably connected to the lifting support plate through a lead screw slider.

[0010] Furthermore, the molding assembly includes a printing platform, a receiving baffle, and a lifting module; the printing platform is equipped with a lifting module around its bottom, and the printing platform forms a molding area by enclosing the side plates; the waste baffle is installed in a funnel shape at the bottom of the printing platform.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. To address the issue of slow inkjet 3D printing speed, two powder spreading components are used, which can achieve bidirectional powder spreading, significantly improving printing efficiency.

[0012] 2. Regarding the printhead clogging issue, firstly, the printhead is cleaned using the printhead cleaning assembly to remove residual adhesive and powder materials. Then, the printhead is wiped using the printhead wiping assembly to further remove residual powder materials, adhesive, and cleaning agents, ensuring that the printhead is cleaned and dried in time during the printing process to prevent clogging.

[0013] 3. Regarding the issue of recycling powder materials after use, excess powder materials are recycled through a waste collection component, which greatly improves the utilization rate of powder materials.

[0014] 4. This device is mainly designed for powder materials such as cement and ceramics, and can print large-scale products, making it suitable for industrial production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the printhead assembly of this utility model; Figure 3 This is a schematic diagram of the molding component of this utility model; Figure 4 This is a schematic diagram of the powder spreading component of this utility model; Figure 5 This is a schematic diagram of the structure of the waste collection component of this utility model; Figure 6 This is a three-dimensional structural diagram of the nozzle cleaning assembly of this utility model; Figure 7 This is a side view of the nozzle cleaning assembly of this utility model; Figure 8 This is a schematic diagram of the structure of the nozzle wiping assembly of this utility model; In the diagram: 1. Control panel; 2. Main frame; 3. XY direction drive assembly; 4. Print head assembly; 5. Forming assembly; 6. Powder spreading assembly; 7. Waste collection assembly; 8. Print head cleaning assembly; 9. Print head wiping assembly; 401. Printer nozzle assembly mounting plate; 402. Vertical guide rail; 403. Ink supply module; 404. Ink supply module mounting plate; 405. Printer nozzle mounting plate; 406. Printer nozzle; 501. Printing platform; 502. Side plate; 503. Material receiving baffle; 504. Lifting module; 505. Support column; 506. Waste baffle; 601. Material feeding bin; 602. Powder spreading bin; 603. Feeding auger; 604. Feeding shaft; 605. Powder spreading assembly side plate; 606. Sliding connector; 607. Powder spreading and leveling roller; 608. Scraper blade; 609. Scraper blade connector; 610. Feeding motor; 611. Conveying pipe; 701. Waste bin; 702. Discharge... 703. Waste discharge auger; 704. Waste discharge motor; 705. Motor connector; 806. Discharge pipe; 807. Cleaning water tank; 808. Water storage tank; 809. Scraper fixing plate; 8000. Rubber scraper; 801. Ultrasonic vibrator; 802. Micro pump; 803. Lifting base plate; 804. Lifting pallet; 805. Position detector; 816. Position sensor; 817. Lead screw; 818. Guide rail; 819. Stepper motor; 810. Motor fixing plate; 811. Lifting upper side cover; 812. Lifting lower side cover; 813. Lifting support plate; 814. Lifting fixing plate; 905. Feeding and receiving section; 906. Nozzle scraping section; 907. Frame. Detailed Implementation

[0016] Specific embodiments are given below with reference to the accompanying drawings. These specific embodiments are only used to further illustrate the technical solution of this utility model in detail and do not limit the scope of protection of this application.

[0017] This utility model provides an industrial-grade inorganic material inkjet 3D printing device (hereinafter referred to as the device, see [link]). Figures 1-8 The system includes an operation panel 1, a main frame 2, an XY direction drive assembly 3, a print head assembly 4, a forming assembly 5, a powder spreading assembly 6, a waste collection assembly 7, a print head cleaning assembly 8, and a print head wiping assembly 9. The main frame 2 is assembled from profile materials and serves as the structural foundation of the entire device; the 3D printing operation panel 1 is located on the side of the main frame 2 at a position convenient for manual operation, and is used for automatically controlling the printing process and realizing human-machine interaction; the XY-direction drive assembly 3 is arranged on the main frame 2, and the print head assembly 4 is mounted on the XY-direction drive assembly 3. Under the action of the XY-direction drive assembly 3, the print head assembly 4 can move along the X direction and the Y direction; the forming assembly 5 is embedded in the middle of the main frame 2, and the two powder spreading assemblies 6 are arranged on the main frame 2 and located at both ends of the forming assembly 5. The powder spreading assemblies 6 are used to lay powder materials on the printing platform of the forming assembly 5, and bidirectional powder spreading is realized through the two powder spreading assemblies 6 to increase the printing speed and solve the problem of low forming speed of inkjet 3D printing; the waste collection assembly 7 is located below one end of the forming assembly 5, and is used for recycling excess powder materials in the powder spreading process; the head cleaning assembly 8 and the head wiping assembly 9 are arranged on one side of the main frame 2 and close to the starting position of the print head. The head cleaning assembly 8 is used for cleaning the print head, and the head wiping assembly 9 is used for wiping off the residual cleaning agent after the print head is cleaned, so as to prevent the print head from clogging.

[0018] The print head assembly 4 includes a print head assembly mounting plate 401, a vertical guide rail 402, an ink supply module 403, an ink supply module mounting plate 404, a head mounting plate 405 and a print head 406. The print head assembly mounting plate 401 is fixedly connected to the X-direction drive module of the XY-direction drive assembly 3, and the vertical guide rail 402 is slidably connected to the print head assembly mounting plate 401, so that the vertical guide rail 402 can slide back and forth in the Z direction to adjust the height of the print head 406. The ink supply module 403 is fixed to the lower part of the vertical guide rail 402 through the ink supply module mounting plate 404. The ink supply module 403 preferably adopts circulating negative pressure ink supply to realize self-circulation of ink during the printing process, reduce air bubbles in the ink, and meanwhile improve the phenomenon of nozzle clogging caused by ink sedimentation. The upper end of the head mounting plate 405 is connected to the lower part of the ink supply module mounting plate 404. A plurality of print heads 406 are arranged on the head mounting plate 405 in a delta-shaped array, the overlap ratio between the heads should be 1-3%, the nozzle end face of the print head 406 and the bottom face of the head mounting plate 405 are at the same horizontal plane, and the distance from the printing platform should be 3-6mm. To meet the forming accuracy requirement, the size of the ink droplets ejected by the print head 406 should be 15-80pl.

[0019] The molding assembly 5 includes a printing platform 501, side plates 502, a receiving baffle 503, a lifting module 504, a support column 505, and a waste baffle 506. The printing platform 501 is positioned above the ground via the support column 505. The lifting module 504 surrounds the printing platform 501 for raising and lowering it. Four side plates 502 enclose the printing platform 501, forming a box structure together with the printing platform 501, serving as the main molding area. Sealing strips 507 are provided at the contact points between the side plates 502 and the printing platform 501 to prevent powder material from leaking out of the molding area. The receiving baffle 503 is located outside the four side plates 502 and is connected to the side plates 502 via side plate positioning strips 508 to prevent excess powder material from leaking out. The waste baffle 506 is located below the printing platform 501 and is funnel-shaped, allowing waste material to fall into the waste bin 701.

[0020] The powder spreading assembly 6 includes a feeding hopper 601, a powder spreading hopper 602, a feeding auger 603, a feeding shaft 604, a powder spreading assembly side plate 605, a sliding connector 606, a powder spreading scraper roller 607, a scraper blade 608, a scraper blade connector 609, and a feeding motor 610. The feeding hopper 601 is welded to the main frame 2 and is connected to the powder spreading hopper 602 via a conveying pipe 611, transporting powder material from the feeding hopper 601 to the powder spreading hopper 602. Inside the powder silo 602; powder spreading component side plates 605 are respectively provided on both sides of the powder spreading silo 602. The lower ends of the two powder spreading component side plates 605 are slidably connected to the slide rail on the main frame 2 along the X direction through sliding connectors 606, so that the powder spreading silo 602 can slide back and forth along the X direction; a feeding auger 603 is rotatably connected inside the powder spreading silo 602, and a feeding motor 610 is located outside the powder spreading silo 602. The output shaft of the feeding motor 610 is connected to the coupling. Connected to one end of the feeding auger 603, the feeding motor 610 drives the feeding auger 603 to rotate, allowing the powder material to fill the entire powder spreading hopper 602 under the action of the feeding auger 603; the feeding shaft 604 is rotatably mounted on the upper part of the side plate 605 of the powder spreading assembly, and is located directly below the outlet of the powder spreading hopper 602. Under the action of the feeding shaft 604, the powder material is precisely extruded from the outlet of the powder spreading hopper 602 and falls onto the printing platform 501 under gravity. The powder spreading and leveling roller 607 is rotatably mounted in the middle of the side plate 605 of the powder spreading assembly and located behind the feeding shaft 604. It is used to compact the powder material spread on the printing platform 501. The scraper 608 is connected to the main frame 2 through the scraper connector 609. It is necessary to ensure that the scraper 608 can contact the powder spreading and leveling roller 607. When the powder spreading and leveling roller 607 passes the scraper 608, it scrapes off the powder material adhering to the surface of the powder spreading and leveling roller 607.

[0021] The waste collection assembly 7 includes a waste bin 701, a waste discharge auger 702, a waste discharge motor 703, and a motor connector 704. The waste bin 701 is open at the top and closed at the bottom, and is located below the waste baffle 506 for collecting waste. One end of the waste bin 701 is connected to an external waste recycling device via a discharge pipe 705. The waste discharge auger 702 is rotatably connected inside the waste bin 701. The waste discharge motor 703 is installed at one end of the waste bin 701 via the motor connector 704. The output shaft of the waste discharge motor 703 is connected to one end of the waste discharge auger 702 via a coupling. The waste discharge motor 703 drives the waste discharge auger 702 to rotate, and the waste is discharged through the discharge pipe 705 under the action of the waste discharge auger 702.

[0022] The printhead cleaning assembly 8 includes a cleaning section and a water tank lifting section. The cleaning section includes a cleaning work tank, a scraper fixing plate 803, a rubber scraper 804, an ultrasonic vibrator 805, and a micro pump 806. The scraper fixing plate 803 is located in the middle of the cleaning work tank, dividing it into a cleaning water tank 801 and a water storage tank 802. The scraper fixing plate 803 has an overflow hole at its upper part. The cleaning water tank 801 stores cleaning agent for cleaning the printhead. The water storage tank 802... 02 is used to store the cleaning agent overflowing from the cleaning tank 801 during the cleaning process; a micro pump 806 is installed at the bottom of the cleaning operation tank and is connected to both the cleaning tank 801 and the storage tank 802, used to pump the cleaning agent in the storage tank 802 to the cleaning tank 801; a rubber scraper 804 is fixed to the top of the scraper fixing plate 803, used to scrape off the powder material adhering to the surface of the print head; an ultrasonic vibrator 805 is installed at the bottom of the cleaning tank 801 to vibrate and clean the print head.

[0023] The water tank lifting mechanism includes a lifting base plate 807, a lifting support plate 808, a position detector 809, a position sensor 810, a lead screw 811, a guide rail 812, a stepper motor 813, a motor mounting plate 814, a lifting upper cover 815, a lifting lower cover 816, a lifting support plate 817, and a lifting fixing plate 818. The lifting base plate 807 is bolted to the nozzle starting position of the printing platform. Two lifting support plates 817 are located on both sides of the lifting base plate 807 and are fixedly connected to it. The bottom of the lifting fixing plate 818 is connected to the lifting base plate 807, and both ends of the lifting fixing plate 818 are connected to the corresponding lifting support plates 817. The lifting lower cover 816 is connected to the lifting fixing plate 818. Guide rails 812 are provided on both sides of the lifting support plate 817. The lifting upper cover 815 is slidably connected to the guide rails 812. The lifting upper cover 815 and the lifting lower cover 816 together form the outer part of the water tank lifting mechanism. The system features a surrounding structure to prevent powder from entering the water tank lifting section during printing. A lifting tray 808 is fixed to the top of the lifting upper cover 815 and slides together with it. A motor fixing plate 814 is located on top of the lifting fixing plate 818. A stepper motor 813 is mounted on the motor fixing plate 814, with its output end fixed to the lower end of a lead screw 811. The upper part of the lead screw 811 is slidably connected to the lifting tray 808 via a lead screw slider. The stepper motor 813 drives the lead screw 811 to rotate, causing the lifting tray 808 to rise and fall. The lifting upper cover 815 rises and falls along with the lifting tray 808 to adjust the height of the cleaning section. A position detector 809 is fixed to the bottom of the lifting tray 808, and a position sensor 810 is located on the lifting fixing plate 818. The position detector 809 receives the sensing signal emitted by the position sensor 810 to detect the position of the lifting tray 808, achieving real-time feedback of the cleaning section's position.

[0024] The printhead wiping assembly 9 includes a feeding section 901, a printhead scraping section 902, and a frame 903. Both the feeding section 901 and the printhead scraping section 902 are connected to the frame 3. The feeding section 901 is used to convey clean paper, and the printhead scraping section 902 maintains a certain contact pressure between the clean paper and the printhead, thereby wiping the cleaned printhead with the clean paper. The structure of the printhead wiping assembly 9 is prior art; see the invention application CN119952969A, "A Dry Wiping Mechanism for the Printhead of an Inkjet 3D Printer."

[0025] The working principle and workflow of this utility model are as follows: Powder spreading: Activate the lifting module 504 to raise and lower the printing platform 501 to its initial position; the powder spreading component 6 starts working, and the powder material in the feeding bin 601 enters the powder spreading bin 602 through the conveying pipe 611. The powder spreading bin 602 slides slowly from left to right along the slide rail in the X direction on the main frame 2. The powder material in the powder spreading bin 602 is squeezed out and sprinkled onto the printing platform 501 under the action of the feeding shaft 604. The powder spreading scraper roller 607 rolls and compacts the sprinkled powder material. When the powder spreading bin 602 moves to the other end of the printing platform 501, the spreading of one layer of powder material is completed. The powder spreading bin 602 waits in the current position to perform the next powder spreading task. The powder spreading speed should be 20-50 seconds per layer. Cement-based powder is preferred. Its main components are cement and fine aggregate. The cement can be one or more of ordinary Portland cement, sulfoaluminate cement and magnesium phosphate cement.

[0026] Inkjet printing: The print head assembly 4 and the XY direction drive assembly 3 start working. The XY direction drive assembly 3 drives the print head 406 to move from right to left, moving one step width at a time, and the step width is consistent with the effective jet width of the print head. While moving, the print head 406 jets ink onto the printing platform 501, causing the powder material on the printing platform 501 to adhere and solidify. After completing one layer of inkjet printing, the print head assembly 4 and the XY direction drive assembly 3 return to their initial positions.

[0027] Cleaning the printhead: The printhead cleaning assembly 8 starts working, starting the stepper motor 813 to drive the lead screw 811 to rotate, causing the cleaning section to rise until the printhead is completely immersed in the cleaning agent; the ultrasonic vibrator 805 is activated to vibrate the cleaning tank 801, vibrating and cleaning the printhead, causing the tiny bubbles in the cleaning agent to burst on the printhead surface, thereby removing residual powder and adhesive from the printhead surface; after cleaning is completed, the stepper motor 813 drives the cleaning section to descend, the printhead moves toward the rubber scraper 804 and passes over the rubber scraper 804, the rubber scraper 804 physically scrapes the printhead surface to remove residual powder and adhesive.

[0028] Printhead wiping: The printhead wiping assembly 9 starts working to wipe the cleaned printhead to prevent residual cleaning agent from clogging the printhead.

[0029] Reactivate the lifting module 504 to lower the printing platform 501 by one layer thickness, which should be 0.1-0.3mm. Repeat the above process to print layer by layer. After printing is complete, the printing platform 501 rises back to the initial position to remove the printed product, and the waste collection component 7 recovers and processes the excess powder material from the printing process.

[0030] Any aspects not covered in this utility model are applicable to the prior art.

Claims

1. An industrial-grade inorganic material inkjet 3D printing device, comprising an operation panel, a main frame, an XY direction drive assembly, a printhead assembly, and a forming assembly; characterized in that, It also includes a powder spreading assembly, a waste collection assembly, a nozzle cleaning assembly, and a nozzle wiping assembly; the two powder spreading assemblies are located at both ends of the forming assembly, the waste collection assembly is located below one end of the forming assembly, and the nozzle cleaning assembly and nozzle wiping assembly are located on the main frame and close to the starting point of the printing nozzle; The powder spreading assembly includes a feeding hopper, a powder spreading hopper, a feeding auger, a feeding shaft, a powder spreading and leveling roller, a scraper, and a feeding motor. The feeding hopper is connected to the main frame and is connected to the powder spreading hopper via a conveying pipe. The powder spreading hopper has powder spreading assembly side plates on both sides, and the lower ends of the two powder spreading assembly side plates are slidably connected to the two sides of the main frame. The feeding auger is rotatably connected inside the powder spreading hopper, and the output shaft of the feeding motor is connected to one end of the feeding auger. The two ends of the feeding shaft are rotatably connected to the upper parts of the two powder spreading assembly side plates and are located directly below the outlet of the powder spreading hopper. The powder spreading and leveling roller is rotatably installed in the middle of the powder spreading assembly side plates and is located behind the feeding shaft. The scraper is connected to the main frame, and when the powder spreading and leveling roller passes overhead, the scraper removes the powder material from the surface of the powder spreading and leveling roller.

2. The industrial-grade inorganic material inkjet 3D printing device according to claim 1, characterized in that, The waste collection assembly includes a waste bin, a waste discharge auger, a waste discharge motor, and a motor connector. The waste bin is located below the molding assembly. The waste discharge auger is rotatably connected inside the waste bin. The waste discharge motor is installed at one end of the waste bin through the motor connector, and the output shaft of the waste discharge motor is connected to one end of the waste discharge auger.

3. The industrial-grade inorganic material inkjet 3D printing device according to claim 1, characterized in that, The nozzle cleaning assembly includes a cleaning section and a water tank lifting section; the cleaning section includes a cleaning working tank, a scraper fixing plate, a rubber scraper, an ultrasonic vibrator, and a micro pump; the cleaning working tank is provided with a scraper fixing plate in the middle, dividing the cleaning working tank into a cleaning water tank and a water storage tank, and the upper part of the scraper fixing plate is provided with an overflow hole; the micro pump is installed at the bottom of the cleaning working tank and is connected to both the cleaning water tank and the water storage tank; the rubber scraper is fixed to the top of the scraper fixing plate, and the ultrasonic vibrator is installed at the bottom of the cleaning water tank.

4. The industrial-grade inorganic material inkjet 3D printing device according to claim 3, characterized in that, The water tank lifting mechanism includes a lifting base plate, a lifting support plate, a lead screw, guide rails, a stepper motor, a lifting upper cover, a lifting lower cover, a lifting support plate, and a lifting fixing plate. Two lifting support plates are located on both sides of the lifting base plate, and the lifting fixing plate is connected to the lifting base plate and the lifting support plates. The lifting lower cover is connected to the lifting fixing plate. Guide rails are provided on both sides of the lifting support plate, and the lifting upper cover is slidably connected to the guide rails. The lifting support plate is located on top of the lifting upper cover, and a cleaning operation trough is installed on the lifting support plate. The stepper motor is installed on the top of the lifting fixing plate through a motor fixing plate. The output end of the stepper motor is connected to the lower end of the lead screw, and the upper part of the lead screw is slidably connected to the lifting support plate through a lead screw slider.

5. The industrial-grade inorganic material inkjet 3D printing apparatus according to any one of claims 1 to 4, characterized in that, The molding assembly includes a printing platform, a receiving baffle, and a lifting module; the printing platform is equipped with lifting modules around its bottom, and the printing platform forms a molding area by being enclosed by side plates, with the waste baffle installed in a funnel shape at the bottom of the printing platform.

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