Device and method for liquid metal printing on paper surface

Abstract

The invention relates to a device and method for liquid metal printing on the surface of paper, the device comprises a liquid metal printer body, a rack, an ink box arranged on the rack, a pressurizing device and a negative pressure device, the pressurizing device and the negative pressure device are arranged on the ink box, and the pressurizing device and the negative pressure device conduct pressurization or negative pressure on the interior of the ink box. An adjusting plate in sealing fit with the ink box is slidably mounted in the ink box, the ink box is provided with a thrust mechanism for driving the adjusting plate to slide, the ink box is further provided with a pressure measuring mechanism, the pressure measuring mechanism is used for measuring air pressure between the adjusting plate and liquid metal in the ink box, and the pressure measuring mechanism is further used for controlling the thrust mechanism. The flow-out speed of the ink in the ink box is adjusted through the positive pressure and the negative pressure, meanwhile, the air pressure in the ink box is detected to adjust the position of the adjusting plate in time through the thrust mechanism, so that the air pressure in the ink box is always in a proper size, the flow-out speed of the ink in the ink box is stable, and the printing effect is improved.

Description

Technical Field

[0001] The present application relates to the field of liquid metal printing, and in particular to a device and method for printing liquid metal on a paper surface. Background Art

[0002] By printing liquid metal on the surface of paper, the paper can have a metallic texture and better performance.

[0003] In the liquid metal printing process, the liquid metal ink needs to be mixed and then put into the ink fountain, and then transported from the ink fountain to the print head for printing. Usually the ink fountain is set vertically, and the output port is set at the bottom of the ink fountain. The liquid metal is transported to the print head by the gravity of the liquid metal itself. However, different liquid metals have different viscosities, which causes some liquid metal inks to be subject to greater gravity. Therefore, it is easy for liquid metal ink to leak from the print head, and some inks flow downward to the print head, but due to excessive viscosity, their flow is not smooth. Both will cause defects in the final liquid metal printed product. Summary of the invention

[0004] In order to solve the problem that liquid metal printed products are prone to defects due to different viscosities of liquid metal ink, the present application provides a device and method for printing liquid metal on a paper surface.

[0005] In the first aspect, the present application provides a device for printing liquid metal on a paper surface using the following technical solution: A device for printing liquid metal on a paper surface comprises a liquid metal printer body, a frame, an ink cartridge arranged on the frame, a pressurizing device and a negative pressure device arranged on the ink cartridge, the pressurizing device and the negative pressure device pressurize or negative pressure the inside of the ink cartridge, an adjustment plate which is sealingly matched with the ink cartridge is slidably installed in the ink cartridge, a thrust mechanism which drives the adjustment plate to slide is arranged on the ink cartridge, a pressure measuring mechanism is also arranged on the ink cartridge, the pressure measuring mechanism is used to measure the air pressure between the adjustment plate and the liquid metal in the ink cartridge, and the pressure testing mechanism is also used to control the thrust mechanism.

[0006] Through the above technical scheme, the outflow speed of the ink in the ink cartridge is adjusted by positive pressure and negative pressure. At the same time, the position of the adjustment plate is timely adjusted through the thrust mechanism by detecting the air pressure inside the ink cartridge so that the air pressure inside the ink cartridge is always at an appropriate size, so that the outflow speed of the ink inside the ink cartridge is relatively stable, thereby improving the printing effect.

[0007] Optionally, the thrust mechanism includes an adjusting motor, a push rod slidably mounted on the ink cartridge and connected to the adjusting plate, and a pressure screw rotatably mounted on the ink cartridge, the pressure screw penetrates into the push rod and cooperates with the push rod thread to push the push rod to slide, an adjusting motor is installed on the ink cartridge, and the output shaft of the adjusting motor is drivingly connected to the pressure screw.

[0008] Optionally, the pressure measuring mechanism includes a measuring tube installed on the ink cartridge, the measuring tube is connected to the interior of the ink cartridge, a measuring plate is sealingly and slidingly installed in the measuring tube, the ink cartridge is provided with a bracket, a stop button is provided on the bracket for stopping the adjusting motor, a start button is provided on the bracket for starting the adjusting motor, a first push plate is provided on the measuring plate, when there is a positive pressure between the measuring tube and the measuring plate, the first push plate presses against the stop button, a first reverse thrust mechanism is provided on the bracket for pushing the first push plate away from the stop button, a second push plate is provided on the measuring plate, when there is a negative pressure between the measuring tube and the measuring plate, the second push plate presses against the start button, and the bracket is provided with a second reverse thrust mechanism for pushing the second push plate away from the start button.

[0009] Optionally, the first reverse thrust mechanism includes a first pressure plate and a second pressure plate slidably mounted on the bracket, the bracket is provided with a first driving member for driving the first pressure plate to slide, the bracket is provided with a first reverse thrust spring and a first limit plate, the two ends of the first reverse thrust spring respectively press against the first pressure plate and the second pressure plate, the second pressure plate presses against the first limit plate, the adjusting plate is transmission-connected to the first driving member, the first driving member will start to push the second pressure plate toward the first pressure plate as the adjusting plate descends, and when the air pressure in the measuring tube reaches the set pressure, the first push plate presses against the first pressure plate, and the first pressure plate presses against the stop button.

[0010] Optionally, the second reverse thrust mechanism includes a third pressure plate and a fourth pressure plate slidably mounted on the bracket, a second driving member is mounted on the bracket for driving the third pressure plate to slide, a second limiting plate and a second reverse thrust spring are provided on the bracket, two ends of the second reverse thrust spring respectively press against the third pressure plate and the fourth pressure plate, the fourth pressure plate presses against the second limiting plate, the adjustment plate is transmission-connected to the second driving member, the second driving member will push the third pressure plate away from the fourth pressure plate as the adjustment plate descends, and when the negative pressure between the ink cartridge and the adjustment plate reaches a set value, the second push plate presses against the fourth pressure plate, and the fourth pressure plate presses against the start button.

[0011] Optionally, two clamping plates are slidably installed on the bracket, and the two clamping plates are respectively fitted with the start button and the stop button. A connecting mechanism is provided on the bracket, and the connecting mechanism is used to connect the first push plate with the clamping plate fitted with the start button, or to connect the second push plate with the clamping plate fitted with the stop button.

[0012] Optionally, the connecting mechanism includes a mounting plate, a first slide slot is provided on the bracket, the mounting plate is slidably mounted in the first slide slot, the mounting plate is provided with a second slide slot, the two clamping plates are respectively mounted at two ends of the mounting plate, and two connecting plates are slidably installed in the second slide slot, the connecting plates are respectively connected to the first push plate and the second push plate, magnets are embedded in the side walls at both ends of the second slide slot, and corresponding magnets that attract each other are embedded on the two connecting plates. When the first push plate presses the stop button, the connecting plate on the first push plate is connected to the mounting plate by magnetic attraction. At this time, when the first reverse push spring pushes the first push plate away from the stop button, the clamping plate at the other end of the mounting plate presses the start button.

[0013] Optionally, a fuse tube is provided on the ink cartridge, and both ends of the fuse tube are open. A sealing ring is coaxially installed in the fuse tube, and a first sealing plate is tightly pressed against one end face of the sealing ring. A first spring is provided on one end of the fuse tube, and a first adjusting tube is also threadedly installed on one end of the fuse tube, and the two ends of the first spring respectively press against the end face of the first adjusting tube and the end face of the first sealing plate, and a second adjusting tube is threadedly installed in the other end of the fuse tube, and a second sealing plate is slidably installed in the fuse tube, and the second sealing plate presses against the end face of the second adjusting tube, and a second spring is provided between the second sealing plate and the first sealing plate, and the two ends of the second spring respectively press against the first sealing plate and the second sealing plate, and the fuse tube is connected to the ink cartridge.

[0014] Optionally, the first driving member includes a first driving screw rotatably mounted on the bracket, the first driving screw passes through the first pressure plate and is threadedly engaged with the first pressure plate, the second driving member includes a second driving screw rotatably mounted on the bracket, the second driving screw passes through the third pressure plate and is threadedly engaged with the third pressure plate, a first rack is provided on the adjusting plate, which is connected to the first driving screw by a gear set, and the first rack can be separated from the gear set of the first driving screw, a second rack is provided on the adjusting plate, which is connected to the second driving screw by a gear set, and the second rack can be separated from the gear set of the second driving screw, and an adjusting component for driving the first rack and the second rack to move is provided on the adjusting plate.

[0015] In a second aspect, the present application provides a method for printing liquid metal on a paper surface using the following technical solution: A method for printing liquid metal on a paper surface comprises the following steps: S1, preparing liquid metal ink; S2, injecting ink into the ink cartridge of the liquid metal printer; S3, after the paper base is laid on the workbench and fixed, printing begins; S4, taking out the printed paper and storing it; The ink cartridge in S2 adopts the ink cartridge mentioned above.

[0016] To summarize, the present application measures the pressure inside the ink cartridge through a measuring tube, and then synchronously feeds back to the stop button or the start button through the first reverse thrust mechanism or the second reverse thrust mechanism, stops or starts the adjusting motor, and then pushes the adjusting plate down through the adjusting motor, so that the air pressure inside the ink cartridge can be at an appropriate size, so that the ink in the ink cartridge can flow out smoothly for printing, thereby enhancing the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the ink cartridge of the present application.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the bracket and the adjusting gear of the present application.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the bracket of the present application.

[0021] Figure 5 is a cross-sectional view of the measuring tube of the present application.

[0022] Figure 6 is a cross-sectional view of the mounting plate of the present application.

[0023] Figure 7 It is a cross-sectional view of the fuse of the present application.

[0024] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0025] Figure numerals: 1, frame; 11, bracket; 111, first slide; 12, stop button; 13, start button; 14, liquid metal printer body; 2, fuse; 21, sealing ring; 22, first sealing plate; 23, first spring; 24, first adjusting tube; 25, second adjusting tube; 26, second sealing plate; 27, second spring; 28, limit ring; 3, ink cartridge; 31, adjusting plate; 311, adjusting gear; 312, worm gear; 313, worm; 32, pressurizing device; 321, pressurizing valve; 33, negative pressure device; 331, negative pressure valve; 4, thrust mechanism; 41, pressurizing screw; 42, push rod; 43, adjusting motor; 5, pressure measuring mechanism; 51, measuring Tube; 52, measuring plate; 53, retaining ring; 54, connecting rod; 55, first push plate; 56, second push plate; 6, first reverse thrust mechanism; 61, first pressure plate; 62, second pressure plate; 63, first reverse thrust spring; 64, first limit plate; 65, first drive screw; 7, second reverse thrust mechanism; 71, third pressure plate; 72, fourth pressure plate; 73, second reverse thrust spring; 74, second limit plate; 75, second drive screw; 8, connecting mechanism; 81, mounting plate; 82, pressing plate; 83, connecting plate; 84, second slide groove; 85, magnet; 9, first slider; 91, first rack; 92, third rack; 10, second slider; 101, second rack; 102, fourth rack. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-7 This application is described in further detail.

[0027] In the first aspect, the present application embodiment discloses a device for printing liquid metal on a paper surface, referring to Figure 1 , including a frame 1 and a liquid metal printer body 14, the liquid metal printer body 14 is fixedly mounted on the frame 1, and an ink cartridge 3 is also fixedly mounted on the frame 1, the ink cartridge 3 is used to store liquid metal ink, a pressurizing device 32 is provided on the ink cartridge 3 for applying positive pressure to the inside of the ink cartridge 3, and a negative pressure device 33 is also provided on the ink cartridge 3, and the negative pressure device 33 is used to apply negative pressure to the inside of the ink cartridge 3.

[0028] The fluidity of the liquid metal ink in the ink cartridge 3 is adjusted by applying positive pressure or negative pressure to the inside of the ink cartridge 3 through the pressure-applying device 32 or the negative pressure device 33, so that when the print head of the liquid metal printer is printing, the liquid metal ink can flow out from the print head at a suitable speed for printing.

[0029] Reference Figure 1 and Figure 2The ink cartridge 3 is cylindrical, and the pressurizing device 32 includes a circular adjusting plate 31 slidably mounted inside the ink cartridge 3, and a sliding seal is formed between the side wall of the adjusting plate 31 and the inner wall of the ink cartridge 3. The ink cartridge 3 is set to be placed vertically, and the adjusting plate 31 is horizontal. The pressurizing device 32 includes a pressurizing valve 321 fixedly mounted on the top wall of the adjusting plate 31, and the pressurizing valve 321 is fixedly connected to the air source through a pipeline. The compressed gas output by the air source enters the ink cartridge 3 through the pressurizing valve 321 to pressurize the liquid metal ink in the ink cartridge 3.

[0030] Reference Figure 1 and Figure 2 A thrust mechanism 4 is provided on the ink cartridge 3, and the thrust mechanism 4 includes a pressurizing screw 41 vertically rotatably mounted on the ink cartridge 3, and a vertical push rod 42 is integrally provided on the top wall of the adjustment plate 31, and the lower end of the pressurizing screw 41 coaxially penetrates into the push rod 42 and is threadedly engaged with the push rod 42. An adjustment motor 43 is also fixedly mounted on the ink cartridge 3, and the adjustment motor 43 is transmission-connected with the pressurizing screw 41 through a gear set, and the pressurizing screw 41 is driven to rotate by the adjustment motor 43, thereby driving the adjustment plate 31 to rise or fall.

[0031] When the water level of the liquid metal ink in the ink cartridge 3 drops, the regulating motor 43 drives the regulating plate 31 to drop synchronously, so that the inside of the ink cartridge 3 always maintains sufficient positive pressure to help the liquid metal ink flow out of the print head normally.

[0032] Reference Figure 1 and Figure 2 The negative pressure device 33 includes a negative pressure valve 331, which is fixedly mounted on the adjustment plate 31 and fixedly connected to the negative pressure source. When the ink with low viscosity is used, the outflow speed of the ink with low viscosity is adjusted by vacuumizing the space between the ink and the adjustment plate 31.

[0033] When the water level of the liquid metal ink in the ink cartridge 3 drops, the regulating motor 43 drives the regulating plate 31 to drop synchronously, so that the negative pressure in the ink cartridge 3 is always in a suitable state.

[0034] Reference Figure 2 and Figure 3 A pressure measuring mechanism 5 is also provided on the ink cartridge 3. Since the power for the outflow of the liquid metal ink depends on its own gravity and the pressure applied by the regulating plate 31, as the amount of liquid metal ink decreases, the pressure of the liquid metal ink at the output end of the ink cartridge 3 will decrease. Therefore, as the amount of liquid metal ink decreases, it is necessary to increase the pressure applied by the regulating plate 31 to the ink so that the ink can flow out normally, or as the amount of liquid metal ink decreases, it is necessary to reduce the negative pressure so that the ink can flow out normally without causing the ink to flow out too slowly due to excessive negative pressure.

[0035] Reference Figure 2 and Figure 5 The pressure measuring mechanism 5 includes a measuring tube 51 fixedly mounted on the ink cartridge 3, a measuring plate 52 is slidably mounted in the measuring tube 51, and a sliding seal is formed between the measuring plate 52 and the inner wall of the measuring tube 51. One end of the measuring tube 51 is sealed and fixedly connected to the adjustment plate 31 through an air pipe, and the air pipe is connected to the inside of the ink cartridge 3. A retaining ring 53 is coaxially fixedly mounted at the port of the other end of the measuring tube 51 to prevent the measuring plate 52 from sliding out of the measuring tube 51, and a connecting rod 54 slides through the retaining ring 53.

[0036] Reference Figure 2 and Figure 5 A connecting rod 54 is coaxially provided on one surface of the measuring plate 52, and the connecting rod 54 slides out from the other end of the measuring tube 51. A first push plate 55 and a second push plate 56 are fixedly mounted on one end of the connecting rod 54 passing through the measuring tube 51.

[0037] Reference Figure 3 and Figure 4 A bracket 11 is fixedly mounted on the ink cartridge 3, and a stop button 12 and a start button 13 are respectively fixedly mounted on both ends of the bracket 11 in the sliding direction relative to the connecting rod 54. The stop button 12 is electrically connected to the adjusting motor 43, and the start button 13 is also electrically connected to the adjusting motor 43. The adjusting motor 43 is stopped by pressing the stop button 12, and the adjusting motor 43 is started by pressing the start button 13.

[0038] Reference Figure 3 and Figure 4 The bracket 11 is provided with a first reverse thrust mechanism 6, which includes a first pressing plate 61 and a second pressing plate 62 slidably mounted on the bracket 11. The first pressing plate 61 and the second pressing plate 62 are parallel to each other and slide in the same direction. Two first reverse thrust springs 63 are sleeved on the bracket 11 between the first pressing plate 61 and the second pressing plate 62, and a first limit plate 64 and a first driving member are also fixedly mounted on the bracket 11.

[0039] Reference Figure 3 and Figure 4 The first driving member includes a first driving screw rod 65, which is rotatably mounted on the bracket 11, and one end of the first driving screw rod 65 passes through the first pressing plate 61 and is threadedly engaged with the first pressing plate 61. The two ends of the first reverse thrust spring 63 are respectively pressed against the first pressing plate 61 and the second pressing plate 62, and the second pressing plate 62 is pressed against the first limit plate 64.

[0040] Reference Figure 3 and Figure 4The bracket 11 is provided with a second reverse thrust mechanism 7, which includes a third pressing plate 71 and a fourth pressing plate 72 which are slidably mounted on the bracket 11. The third pressing plate 71 and the fourth pressing plate 72 are parallel to each other and slide in the same direction. Two second reverse thrust springs 73 are sleeved on the bracket 11 between the third pressing plate 71 and the fourth pressing plate 72, and a second limit plate 74 and a second driving member are also fixedly mounted on the bracket 11.

[0041] Reference Figure 3 and Figure 4 The second driving member includes a second driving screw 75, one end of which passes through the third pressing plate 71 and is threadedly engaged with the third pressing plate 71. The two ends of the second reverse thrust spring 73 respectively press against the third pressing plate 71 and the fourth pressing plate 72, and the fourth pressing plate 72 presses against the second limiting plate 74.

[0042] When there is a positive pressure between the measuring tube 51 and the measuring plate 52, the measuring plate 52 pushes the first push plate 55 to press against the second pressure plate 62 through the connecting rod 54, and the second pressure plate 62 presses against the stop button 12. When there is a negative pressure between the measuring tube 51 and the measuring plate 52, the measuring plate 52 pushes the second push plate 56 to press against the fourth pressure plate 72 through the connecting rod 54, and the fourth pressure plate presses against the start button 13.

[0043] Reference Figure 3 and Figure 4 A connecting mechanism 8 is also provided on the bracket 11. A first sliding groove 111 is opened on the bracket 11. The connecting mechanism 8 includes a mounting plate 81 slidably installed in the first sliding groove 111. The mounting plate 81 slides along the telescopic direction of the connecting rod 54.

[0044] Reference Figure 4 and Figure 6 A pressing plate 82 is fixedly installed at both ends of the mounting plate 81, and the pressing plates 82 are respectively pressed against the start button 13 and the stop button 12 to press both the start button 13 and the stop button 12.

[0045] Reference Figure 4 and Figure 6 The first push plate 55 and the second push plate 56 are fixedly connected to each other, and a connecting plate 83 is fixedly installed on the first push plate 55 and the second push plate 56. A second slide groove 84 is opened on the mounting plate 81, and one end of the connecting plate 83 is slidably installed in the second slide groove 84. Magnets 85 are embedded on the side walls at both ends of the second slide groove 84, and a corresponding magnet 85 that attracts each other is fixedly installed on one end of the connecting plate 83 located in the slide groove.

[0046] Reference Figure 4 and Figure 6When the first push plate 55 is pressed against the second pressure plate 62, the connecting plate 83 on the first push plate 55 slides to fit against one end face of the second slide groove 84. At this time, the magnet 85 on the connecting plate 83 and the magnet 85 on the end face of the second slide groove 84 attract each other, and the mounting plate 81 and the first push plate 55 are magnetically connected. The magnetic attraction force is greater than the force of pressing the start button 13. At this time, the first push plate 55 completely presses the stop button 12, and the pressing plate 82 at the other end of the mounting block releases the start button 13. When the first reverse push spring 63 pushes the first pressure plate 61 back to release the stop button 12, the pressing plate 82 at the other end of the mounting block presses the start button 13, and the adjustment motor 43 starts.

[0047] Reference Figure 4 and Figure 6 When the second push plate 56 is pressed against the third pressing plate 71, the mounting plate 81 slides to one end of the first slide groove 111, and the magnet 85 of the connecting plate 83 on the first push plate 55 is separated from the magnet 85 on the end face of the second slide groove 84, and the connecting plate 83 on the second push plate 56 slides to the other end face of the second slide groove 84, and the magnet 85 on the connecting plate 83 of the second push plate 56 and the magnet 85 at the other end of the second slide groove 84 are attracted to each other, and the mounting plate 81 and the second push plate 56 are connected by magnetic attraction. At this time, the second push plate 56 completely presses the start button 13, and the pressing plate 82 at the other end of the mounting block releases the stop button 12. When the second reverse push spring 73 pushes the fourth pressing plate 72 back to release the start button 13, the pressing plate 82 at the other end of the mounting block presses the stop button 12, and the regulating motor 43 stops.

[0048] Reference Figure 2 and Figure 3 After the liquid metal printer body 14 is started, if positive pressure is required in the ink cartridge 3, the regulating motor 43 is first powered off, and then the compressed air is input into the ink cartridge 3 through the pressurizing valve 321 to the set pressure and then the pressurizing valve 321 is closed. At this time, the air pressure in the measuring tube 51 pushes the measuring plate 52 and the connecting rod 54 to slide, and the connecting rod 54 pushes the first push plate 55 to press against the second pressure plate 62 to press the stop button 12, and then the first driving screw 65 is rotated to push the first pressure plate 61 to slide until the pressure of the first reverse thrust spring 63 is just equal to the air pressure in the measuring tube 51 and then stops, and then the regulating motor 43 is powered on to officially start liquid metal printing.

[0049] Reference Figure 2 and Figure 3As printing proceeds, the ink in the ink cartridge 3 continues to drop, and the pressure in the ink cartridge 3 decreases. The first reverse thrust spring 63 pushes the second pressure plate 62 and the first push plate 55 away from the stop button 12 and presses the start button 13 through the abutment plate 82. The adjustment motor 43 starts to drive the pressure screw 41 to rotate, thereby driving the push rod 42 and the adjustment plate 31 to drop. After the adjustment plate 31 drops to a certain distance, the air pressure in the ink cartridge 3 rises, thereby pushing the measuring plate 52 to slide. After the measuring plate 52 slides, the stop button 12 is pressed again through the first push plate 55 and the second pressure plate 62, and the adjustment motor 43 stops. The above process is repeated so that the pressure inside the ink cartridge 3 is always at the required pressure. Compared with the method of inflating and replenishing, the air pressure is adjusted more quickly and sensitively by pressing the adjustment plate 31 downward, which is beneficial to improving the quality of the finished product printed by liquid metal.

[0050] At the same time, as the liquid metal ink inside the ink cartridge 3 decreases, the pressure generated by the weight of the ink itself will decrease, so it is necessary to apply greater pressure to the ink inside the ink cartridge 3 to maintain smooth ink discharge.

[0051] Reference Figure 2 and Figure 3 A first rack 91 is provided on the adjustment plate 31, and the first rack 91 is connected to the first driving screw 65 through a gear set. When the adjustment plate 31 descends, the first driving screw 65 is driven to rotate synchronously through the first rack 91. The rotation of the first driving screw 65 drives the first pressure plate 61 to move and compress the first reverse thrust spring 63. The reverse thrust of the first reverse thrust spring 63 increases, so that a larger air pressure is required inside the ink cartridge 3 to press the stop button 12, thereby increasing the air pressure inside the ink cartridge 3, so that the air pressure inside the ink cartridge 3 can be increased synchronously with the reduction of ink, so that the ink discharge at the print head can always remain smooth.

[0052] Reference Figure 3 and Figure 4 If it is necessary to provide negative pressure inside the ink cartridge 3, firstly, the negative pressure valve 331 is used to evacuate the inside of the ink cartridge 3 to a specified negative pressure, and then the negative pressure valve 331 is closed. At this time, under the action of negative pressure, the measuring plate 52 pushes the second push plate 56 to press against the fourth pressure plate 72, and the fourth pressure plate 72 presses against the start button 13. The second driving screw 75 is rotated to push the third pressure plate 71 to slide, and the third pressure plate 71 pushes the second reverse push spring 73 to be compressed until the elastic force of the second reverse push spring 73 pushes the fourth pressure plate 72 just away from the start button 13. Then, the adjustment motor 43 is powered on to start printing.

[0053] Reference Figure 2 and Figure 3At the same time, as printing proceeds, the ink level in the ink cartridge 3 drops, the negative pressure in the ink cartridge 3 increases, the measuring plate 52 pushes the second push plate 56 and the fourth pressure plate 72 to press against the start button 13, the start button 13 starts the adjustment motor 43, the adjustment motor 43 starts to lower the adjustment plate 31, the negative pressure in the ink cartridge 3 decreases, the second reverse thrust spring 73 pushes the fourth pressure plate 72 away from the start button 13 and presses the stop button 12 through the pressing plate 82, the adjustment motor 43 stops, and the above process is repeated until the ink in the ink cartridge 3 is used up.

[0054] As the amount of liquid metal ink in the ink cartridge 3 decreases, the required negative pressure also decreases. Therefore, it is necessary to reduce the negative pressure inside the ink cartridge 3 to ensure that the ink cartridge 3 does not discharge ink smoothly due to excessive negative pressure.

[0055] Reference Figure 2 and Figure 3 A second rack 101 is provided on the adjustment plate 31, and the second rack 101 is connected to the second driving screw 75 through a gear set. As the adjustment plate 31 descends, the second rack 101 drives the second driving screw 75 to rotate and push the third pressure plate 71 to slide away from the fourth pressure plate 72 to reduce the elastic force of the second reverse thrust spring 73, so that the adjustment plate 31 needs to be closer to the liquid metal ink level in the ink cartridge 3 to reduce the negative pressure in the ink cartridge 3, so that the second reverse thrust spring 73 can push the fourth pressure plate 72 away. Reference Figure 2 and Figure 3 The adjusting plate 31 is provided with an adjusting assembly, which includes a first slider 9 and a second slider 10 slidably mounted on the adjusting plate 31, a first rack 91 fixedly mounted on the first slider 9, a second rack 101 fixedly mounted on the second slider 10, an adjusting gear 311 rotatably mounted on the adjusting plate 31, a third rack 92 fixedly mounted on the first slider 9, a fourth rack 102 fixedly mounted on the second slider 10, the third rack 92 and the fourth rack 102 are respectively located on both sides of the adjusting gear 311 and are both connected to the adjusting gear 311 Engagement, rotating the adjusting gear 311 can drive the first slider 9 and the second slider 10 to slide back to each other, and then through the sliding of the first slider 9 and the second slider 10, the first rack 91 is engaged with the gear set on the first driving screw rod 65 or the second rack 101 is engaged with the gear set on the second driving screw rod 75, so that when the first driving screw rod 65 rotates, the second driving screw rod 75 will not rotate, and the first driving screw rod 65 or the second driving screw rod 75 will not be damaged due to excessive rotation due to the synchronous rotation of the first driving screw rod 65 and the second driving screw rod 75.

[0056] Reference Figure 2 and Figure 3A worm wheel 312 is coaxially fixedly mounted on the adjusting gear 311, and a worm 313 meshing with the worm wheel 312 is rotatably mounted on the adjusting plate 31, so that the adjusting gear 311 is self-locked and fixed by the worm wheel 312 and the worm 313.

[0057] Reference Figure 2 and Figure 3 A fuse tube 2 is also fixedly mounted on the ink cartridge 3, and the fuse tube 2 is connected to the air pipe.

[0058] Reference Figure 7 Both ends of the fuse tube 2 are open, a sealing ring 21 is coaxially fixedly installed in the fuse tube 2, and a first sealing plate 22 is tightly pressed against one end surface of the sealing ring 21, a first spring 23 is arranged on one end of the fuse tube 2, and a first adjusting tube 24 is threadedly installed on one end of the fuse tube 2, and the two ends of the first spring 23 are respectively pressed against the end surface of the first adjusting tube 24 and the end surface of the first sealing plate 22, and a second adjusting tube 25 is threadedly installed in the other end of the fuse tube 2, a second sealing plate 26 is slidably installed in the fuse tube 2, and the second sealing plate 26 is pressed against the end surface of the second adjusting tube 25, a limiting ring 28 is coaxially and integrally arranged in the fuse tube 2, a second spring 27 is arranged between the limiting ring 28 and the second sealing plate 26, and the two ends of the second spring 27 are respectively pressed against the end surface of the limiting ring 28 and the second sealing plate 26.

[0059] Reference Figure 7 The first sealing plate 22 is sealed with the sealing ring 21, and a gap is provided between the first sealing plate 22 and the inner wall of the fuse tube 2. The second sealing plate 26 is sealed with the end face of the second regulating tube 25, and a gap is also provided between the second sealing plate 26 and the inner wall of the fuse tube 2.

[0060] Reference Figure 7 When the air pressure in the fuse tube 2 is too high, the air pressure will push the first sealing plate 22 open to release the pressure. When the negative pressure in the fuse tube 2 is too high, the external atmospheric pressure will push the second sealing plate 26 open to replenish the air pressure inside the ink cartridge 3, so that the air pressure inside the ink cartridge 3 will not be too high or too low, and the adjustment plate 31 will not be damaged due to excessive pressure against the bottom of the ink cartridge 3, or the adjustment plate 31 will not rise excessively.

[0061] Reference Figure 7 At the same time, the first regulating tube 24 and the second regulating tube 25 are rotated and adjusted to adjust the triggering pressure of the fuse tube 2.

[0062] In a second aspect, an embodiment of the present application provides a method for printing liquid metal on a paper surface, comprising the following steps: S1, preparing liquid metal ink; S2, injecting ink into the ink cartridge 3 of the liquid metal printer; S3, after the paper base is laid on the workbench and fixed, printing begins; S4, taking down the printed paper and storing it; The ink cartridge 3 in S2 is the ink cartridge 3 mentioned above.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for printing liquid metal on a paper surface, comprising a liquid metal printer body (14), a frame (1), and an ink cartridge (3) arranged on the frame (1), characterized in that: The ink cartridge (3) further comprises a pressurizing device (32) and a negative pressure device (33) arranged on the ink cartridge (3), wherein the pressurizing device (32) and the negative pressure device (33) apply pressurization or negative pressure to the interior of the ink cartridge (3); an adjusting plate (31) which is sealingly matched with the ink cartridge (3) is slidably mounted in the ink cartridge (3); a thrust mechanism (4) which drives the adjusting plate (31) to slide is arranged on the ink cartridge (3); a pressure measuring mechanism (5) is also arranged on the ink cartridge (3); the pressure measuring mechanism (5) is used to measure the air pressure between the adjusting plate (31) and the liquid metal in the ink cartridge (3); and the pressure testing mechanism is also used to control the thrust mechanism (4).

2. The device for printing liquid metal on a paper surface according to claim 1, characterized in that: The thrust mechanism (4) comprises an adjusting motor (43), a push rod (42) slidably mounted on the ink cartridge (3) and connected to the adjusting plate (31), and a pressurizing screw (41) rotatably mounted on the ink cartridge (3); the pressurizing screw (41) penetrates into the push rod (42) and is threadably engaged with the push rod (42) to push the push rod (42) to slide; the ink cartridge (3) is mounted with an adjusting motor (43); an output shaft of the adjusting motor (43) is drivingly connected to the pressurizing screw (41).

3. The device for printing liquid metal on a paper surface according to claim 1, characterized in that: The pressure measuring mechanism (5) comprises a measuring tube (51) mounted on the ink cartridge (3), the measuring tube (51) being in communication with the interior of the ink cartridge (3), a measuring plate (52) being sealingly and slidably mounted in the measuring tube (51), the ink cartridge (3) being provided with a bracket (11), a stop button (12) being provided on the bracket (11) for stopping the regulating motor (43), a start button (13) being provided on the bracket (11) for starting the regulating motor (43), a first push plate (55) being provided on the measuring plate (52), When a positive pressure is present between the measuring tube (51) and the measuring plate (52), the first push plate (55) presses against the stop button (12), and the bracket (11) is provided with a first reverse push mechanism (6) for pushing the first push plate (55) away from the stop button (12). A second push plate (56) is provided on the measuring plate (52), and when a negative pressure is present between the measuring tube (51) and the measuring plate (52), the second push plate (56) presses against the start button (13), and the bracket (11) is provided with a second reverse push mechanism (7) for pushing the second push plate (56) away from the start button (13).

4. The device for printing liquid metal on a paper surface according to claim 3, characterized in that: The first reverse thrust mechanism (6) comprises a first pressing plate (61) and a second pressing plate (62) which are slidably mounted on the bracket (11); a first driving member is arranged on the bracket (11) for driving the first pressing plate (61) to slide; a first reverse thrust spring (63) and a first limit plate (64) are arranged on the bracket (11); two ends of the first reverse thrust spring (63) respectively press against the first pressing plate (61) and the second pressing plate (62); the second pressing plate (62) presses against the first limit plate (64); the adjusting plate (31) is transmission-connected with the first driving member; the first driving member starts to push the second pressing plate (62) toward the first pressing plate (61) as the adjusting plate (31) descends; when the air pressure in the measuring tube (51) reaches a set pressure, the first pushing plate (55) presses against the first pressing plate (61), and the first pressing plate (61) presses against the stop button (12).

5. The device for printing liquid metal on a paper surface according to claim 4, characterized in that: The second reverse thrust mechanism (7) comprises a third pressing plate (71) and a fourth pressing plate (72) which are slidably mounted on the bracket (11); a second driving member is mounted on the bracket (11) for driving the third pressing plate (71) to slide; a second limiting plate (74) and a second reverse thrust spring (73) are arranged on the bracket (11); two ends of the second reverse thrust spring (73) respectively press against the third pressing plate (71) and the fourth pressing plate (72); the fourth pressing plate (72) presses against the second limiting plate (74); the adjusting plate (31) is transmission-connected with the second driving member; the second driving member pushes the third pressing plate (71) away from the fourth pressing plate (72) as the adjusting plate (31) descends; when the negative pressure between the ink cartridge (3) and the adjusting plate (31) reaches a set value, the second pushing plate (56) presses against the fourth pressing plate (72), and the fourth pressing plate (72) presses against the start button (13).

6. The device for printing liquid metal on a paper surface according to claim 5, characterized in that: Two abutment plates (82) are slidably mounted on the bracket (11), and the two abutment plates (82) are respectively fitted with the start button (13) and the stop button (12). A connecting mechanism (8) is provided on the bracket (11), and the connecting mechanism (8) is used to connect the first push plate (55) with the abutment plate (82) fitted with the start button (13), or to connect the second push plate (56) with the abutment plate (82) fitted with the stop button (12).

7. The device for printing liquid metal on a paper surface according to claim 6, characterized in that: The connecting mechanism (8) comprises a mounting plate (81), a first slide groove (111) is provided on the bracket (11), the mounting plate (81) is slidably mounted in the first slide groove (111), a second slide groove (84) is provided on the mounting plate (81), two abutting plates (82) are respectively mounted at two ends of the mounting plate (81), two connecting plates (83) are slidably mounted in the second slide groove (84), the connecting plates (83) are respectively connected to the first push plate (55) and the second push plate (56), and the second slide groove (84) is provided with a plurality of connecting plates (83) disposed on the mounting plate (81). ) are embedded in the side walls at both ends, and the two connecting plates (83) are embedded with corresponding magnets (85) that attract each other. When the first push plate (55) presses the stop button (12), the connecting plate (83) on the first push plate (55) and the mounting plate (81) are connected by magnetic attraction. At this time, when the first reverse push spring (63) pushes the first push plate (55) away from the stop button (12), the clamping plate (82) at the other end of the mounting plate (81) presses the start button (13).

8. The device for printing liquid metal on a paper surface according to claim 1, characterized in that: The ink cartridge (3) is provided with a fuse tube (2), both ends of the fuse tube (2) are open, a sealing ring (21) is coaxially mounted inside the fuse tube (2), one end surface of the sealing ring (21) is tightly fitted with a first sealing plate (22), a first spring (23) is arranged on one end of the fuse tube (2), a first adjusting tube (24) is also threadedly mounted on one end of the fuse tube (2), and both ends of the first spring (23) are respectively tightly fitted with the end surface of the first adjusting tube (24) and the first sealing plate The second regulating tube (25) is threadedly mounted on the other end of the fuse tube (2). A second sealing plate (26) is slidably mounted in the fuse tube (2). The second sealing plate (26) is tightly pressed against the end surface of the second regulating tube (25). A second spring (27) is arranged between the second sealing plate (26) and the first sealing plate (22). The two ends of the second spring (27) are respectively pressed against the first sealing plate (22) and the second sealing plate (26). The fuse tube (2) is connected to the ink cartridge (3).

9. The device for printing liquid metal on a paper surface according to claim 5, characterized in that: The first driving member comprises a first driving screw (65) rotatably mounted on the bracket (11), the first driving screw (65) passing through the first pressing plate (61) and threadedly engaged with the first pressing plate (61); the second driving member comprises a second driving screw (75) rotatably mounted on the bracket (11), the second driving screw (75) passing through the third pressing plate (71) and threadedly engaged with the third pressing plate (71); a first rack (91) is provided on the adjustment plate (31), and is connected to the first driving screw (65) by a gear set, and the first rack (91) can be separated from the gear set of the first driving screw (65); a second rack (101) is provided on the adjustment plate (31), and is connected to the second driving screw (75) by a gear set, and the second rack (101) can be separated from the gear set of the second driving screw (75); and an adjustment component for driving the first rack (91) and the second rack (101) to move is provided on the adjustment plate (31).

10. A method for printing liquid metal on a paper surface, comprising the following steps: S1, preparing liquid metal ink; S2, injecting ink into the ink cartridge (3) of the liquid metal printer; S3, after the paper base is laid on the workbench and fixed, printing begins; S4, taking down the printed paper and storing it; The ink cartridge (3) in S2 is the ink cartridge (3) described above.

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