A coating apparatus and coating method for a thermal label paper substrate

Abstract

The application relates to the field of hot-sensitive label paper coating technology, and discloses a hot-sensitive label paper base material coating device and a coating method. The device comprises a bottom plate, a storage frame is fixedly connected to the top of the bottom plate, a frame plate is fixedly connected to the top of the bottom plate, the storage frame is arranged on the inner side of the frame plate, and a coating mechanism is arranged on the frame plate. Through the design of the coating mechanism, the coating material is discharged to the hot-sensitive paper through the discharge frame, the blocking strips are used for dividing the openings of the discharge frames, the blocking strips between the two discharge frames are staggered, the coating material forms a space complementary effect after being discharged through the two discharge frames, the hot-sensitive paper surface can be effectively covered, when the coating area passes through the material scraping plate, the material scraping plate spreads and scrapes the coating material, so that the coating quality is guaranteed, the excessive material after scraping is accumulated in the overflow groove, and the cleaning plate is used for pushing the material into the box body for storage, so that the excessive material is recycled, resource waste is avoided, and cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal label paper coating, and in particular to a coating device and a coating method for a thermal label paper substrate. Background Art

[0002] Thermal paper generally refers to the paper used as a communication carrier for text and graphics on fax machines, that is, as fax paper; it is also used as a recording material in medical and measurement systems, such as electrocardiogram paper and thermal instrument recording paper. Its production principle is to coat ordinary paper with microparticle powder. Under heating conditions, the film melts and the powder mixes to produce a color reaction.

[0003] Patent announcement number CN213468473U discloses an adjustable thermal paper production coating machine, including a workbench, a first conveyor roller, and a coating plate. An adjustment mechanism is provided at the middle position of the top of the workbench. The outer side walls of the rotating rod are each installed with a movable block. A storage box is fixed to the top of the bridge, a feed pipe is fixed to one side of the storage box, and a coating plate is fixed to one end of the feed pipe. A drying mechanism is provided at the bottom end of the bridge. By providing the adjustment mechanism, the first servo motor is started to drive the pulley to rotate. Since the bottom ends of the pulleys are fixedly connected to the rotating rod, the two sets of rotating rods are driven to rotate, thereby driving the movable block to move, and then driving the coating plate to move. The staff starts the first servo motor according to the actual situation and moves the coating plate to the appropriate position, making it easy to adjust the height of the coating plate, thereby greatly increasing the practicality of the coating machine during use.

[0004] When the above device is working, a coating plate is set up to coat the thermal paper substrate. Its overall coating structure is relatively simple. In the actual coating process, it is necessary to ensure that the material is evenly and flatly coated on the substrate paper to ensure the coating quality and the rational use of the material. During use, the above device cannot ensure that it can spray the substrate paper evenly and flatly due to its single structure and function, which may result in coating quality defects or excessive material consumption. Therefore, a coating device and coating method for a thermal label paper substrate are proposed to solve the above problems. Summary of the Invention

[0005] In order to solve the above-mentioned problems, the present invention provides a coating device for a thermal label paper substrate.

[0006] The present invention provides a coating device for a thermal label paper substrate using the following technical solutions:

[0007] A coating device for a thermal label paper substrate comprises a bottom plate, a material storage frame is fixedly connected to the top of the bottom plate, a frame plate is fixedly connected to the top of the bottom plate, the material storage frame is arranged on the inner side of the frame plate, and a coating mechanism is arranged on the frame plate;

[0008] The top of the box body is fixedly connected with a positioning plate, and the top of the box body is fixedly connected with a first threaded block, and the outer side of the first threaded block is fixedly connected with the connecting plate, and one end of the connecting plate is fixedly connected with a cleaning plate, and the cleaning plate extends into the interior of the overflow trough and matches the overflow trough.

[0009] By adopting the above technical solution, when performing the coating operation, the coating material is discharged onto the thermal paper through the discharge frame, the barrier strips divide the opening of the discharge frame, and the barrier strips between the two discharge frames are staggered with each other, so the coating material forms a spatial complementary effect after being discharged through the two discharge frames, which can effectively cover the surface of the thermal paper. When the coating area passes through the scraper plate, the scraper plate spreads and flattens the coating material to ensure the coating quality. After scraping, the excess material accumulates in the overflow trough and is pushed into the box body for storage through the cleaning plate, so that the excess material can be recycled to avoid waste of resources and save costs.

[0010] Preferably, two L-shaped plates are provided at the bottom of the discharge pipe, and the two L-shaped plates are respectively provided on the left and right sides of the discharge frame, and one side of the L-shaped plate is fixedly connected to the side wall of the two discharge frames, and a bidirectional threaded rod is rotatably connected between the two L-shaped plates, and the bidirectional threaded rod is provided between the two discharge frames. An auxiliary plate is provided on one side of the L-shaped plate, and two baffles are fixedly connected to the bottom of the auxiliary plate, and the baffle extends into the through groove and matches the through groove. Two second threaded blocks are provided on the outside of the bidirectional threaded rod, and a push-pull plate is fixedly connected to one side of the second threaded block, and the push-pull plate passes through the L-shaped plate, and one end of the push-pull plate is fixedly connected to the auxiliary plate, and the barrier strips are arranged at equal intervals inside the discharge frame, and a discharge port is provided on the discharge pipe, and the discharge port is connected to the discharge frame, and a rectangular plate is fixedly connected between the two discharge frames.

[0011] By adopting the above technical solution, the second threaded block moves to drive the push-pull plate to move.

[0012] Preferably, the bidirectional threaded rod passes through the two second threaded blocks in sequence, and the bidirectional threaded rod is respectively connected to the two second threaded blocks by threads, the bottom of the rectangular plate is fixedly connected to the first motor, the first motor is fixedly connected to the first bevel gear through the output shaft, the outside of the bidirectional threaded rod is fixedly connected to the second bevel gear, the second bevel gear is arranged on the top of the first bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0013] By adopting the above technical solution, the threads at both ends of the bidirectional threaded rod have opposite directions, which can drive the two second threaded blocks to move towards or away from each other.

[0014] Preferably, the top of the base plate is fixedly connected to a pump body, the input end of the pump body is fixedly connected to a first pipe, one end of the first pipe is fixedly connected to a side wall of the material storage frame, the output end of the pump body is fixedly connected to a second pipe, one end of the second pipe is fixedly connected to one end of the discharge pipe, the top of the material storage frame is fixedly connected to a filling pipe, the top of the filling pipe is provided with an end cover, the end cover extends into the interior of the filling pipe and matches the filling pipe.

[0015] By adopting the above technical solution, the material inside the storage frame is injected through the injection pipe.

[0016] Preferably, one side of the scraper plate is fixedly connected to two mounting plates, and a threaded adjusting rod is rotatably connected between the two mounting plates, one side of one mounting plate is fixedly connected to a second motor, the second motor is fixedly connected to one end of the threaded adjusting rod through an output shaft, the threaded adjusting rod passes through the first threaded block and is threadedly connected to the first threaded block, a second electric push rod is fixedly connected to a side wall of the track frame, one end of the second electric push rod is fixedly connected to one side of the moving block, the top of the scraper plate is fixedly connected to a limiting plate, the limiting plate passes through the extension plate, the bottom of the box body is fixedly connected to a discharge pipe, and a valve is provided on the discharge pipe.

[0017] By adopting the above technical solution, the threaded adjustment rod rotates to drive the first threaded block to move horizontally.

[0018] Preferably, a cleaning mechanism is provided on the top of the base plate, and the cleaning mechanism includes a shell, the shell is fixedly connected to the top of the base plate, the top of the base plate is fixedly connected to a first vertical plate, the top of the shell is fixedly connected to a second vertical plate, a cleaning roller is rotatably connected between the first vertical plate and the second vertical plate, the outside of the cleaning roller is fixedly connected to bristles, one side of the first vertical plate is fixedly connected to a U-shaped plate, one side of the U-shaped plate is fixedly connected to a third motor, the third motor is fixedly connected to one end of one of the cleaning rollers through an output shaft, two drainage pipes are respectively fixedly connected to the top of the shell, one end of the two drainage pipes are integrated with a dust collection hood, the two cleaning rollers extend into the interior of the two dust collection hoods respectively, and the inside of the two dust collection hoods are fixedly connected with a scraping plate.

[0019] By adopting the above technical solution, the bristles of the cleaning roller can brush away the dust on the surface of the thermal paper substrate during the rotation of the cleaning roller.

[0020] Preferably, the outside of the two cleaning rollers are fixedly connected to the first gear, and the two first gears are meshed with each other. A sealing door is provided on one side wall of the shell, and the sealing door is connected to the shell by a hinge. The inside of the shell is rotatably connected to the first fan, and the inside of the shell is rotatably connected to the annular mesh plate, and the annular mesh plate is provided on the outside of the first fan. A dust cleaning plate is fixedly connected to one side wall of the inner cavity of the shell, and the dust cleaning plate is in contact with the outside of the annular mesh plate. A fourth motor is fixedly connected to the outside of the shell, and the fourth motor is fixedly connected to the second gear through the output shaft. The outside of the annular mesh plate is fixedly connected to a gear ring, and the second gear is meshed with the gear ring. A first dust net is fixedly connected to one side wall of the shell.

[0021] By adopting the above technical solution, the cleaned dust is sucked into the interior of the shell by the first fan.

[0022] Preferably, a drying component is also provided on the top of the base plate, and the drying component includes a frame, the frame is provided on the top of the base plate, a second fan is fixedly connected to the inside of the frame, a heating wire is fixedly connected to the inside of the frame, the heating wire is provided at the bottom of the second fan, an air guide cover is fixedly connected to one side wall of the frame, a heat exhaust hole is opened on one side wall of the frame, the heat exhaust hole is communicated with the air guide cover, two support plates are fixedly connected to the top of the base plate, the frame is fixedly connected to the two support plates respectively, and a second dustproof net is fixedly connected to the top of the frame.

[0023] By adopting the above technical solution, the airflow generated during the drying process enters the air guide cover through the heat exhaust holes and is discharged from the opening of the air guide cover, thereby preheating the coating area on the thermal paper substrate.

[0024] Preferably, two long plates are fixedly connected to the top of the bottom plate, and a guide roller is rotatably connected between the two long plates.

[0025] By adopting the above technical solution, the guide roller guides and conducts the thermal paper.

[0026] Another technical problem to be solved by the present invention is to provide a coating method of a coating device for a thermal label paper substrate, comprising the following steps:

[0027] S1. Dust cleaning

[0028] During coating, when the thermal paper substrate passes between the two cleaning rollers, the two cleaning rollers are controlled to rotate and clean the dust on the surface of the substrate;

[0029] S2. Coating process

[0030] After the substrate passes under the discharge frame, the coated material is discharged through the bottom opening of the discharge frame and falls onto the substrate. When the coated area passes through the scraper, the scraper scrapes and flattens the material in the coated area.

[0031] S3, drying and heating

[0032] When the coated area passes through the frame, the airflow generated by the second fan is heated into hot airflow when passing through the heating wire, and blows toward the coated area to achieve the purpose of drying.

[0033] In summary, the present invention has the following beneficial technical effects:

[0034] A coating device and coating method for a thermal label paper substrate. Through the design of the coating mechanism, the coating material is discharged onto the thermal paper through a discharge frame, and the barrier strips divide the discharge frame opening. The barrier strips between the two discharge frames are staggered, so that the coating material forms a spatial complementary effect after being discharged through the two discharge frames, and can effectively cover the surface of the thermal paper. When the coating area passes through a scraper plate, the scraper plate spreads and flattens the coating material to ensure the coating quality. After scraping, excess material accumulates in an overflow trough and is pushed into the box body for storage through a cleaning plate, so that the excess material is recycled, avoiding resource waste and saving costs.

[0035] A coating device and coating method for a thermal label paper substrate. Through the design of a cleaning mechanism, when the thermal paper substrate passes between two cleaning rollers, the bristles of the brush rotate to brush away dust on the surface of the thermal label paper substrate, thereby achieving the cleaning purpose and avoiding the situation where the presence of dust causes a decrease in subsequent coating quality. On this basis, the bristles themselves are also cleaned, effectively improving the cleaning effect of the substrate.

[0036] A coating device and coating method for a thermal label paper substrate. Through the design of a drying component, when the coated area passes through a frame, a hot air flow is blown to the surface of the thermal paper substrate to form a drying effect. During drying, after contacting the surface of the thermal paper substrate, the hot air enters the air guide cover through the heat exhaust hole and is discharged through an opening on one side of the air guide cover, so as to preheat the coated area that has not been dried, so as to avoid the possibility of cracking when the coated area is directly subjected to high-temperature drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the material storage frame in the present invention;

[0039] Figure 3 This is a bottom view of the arrangement frame of the present invention;

[0040] Figure 4 It is a cross-sectional structural diagram of the discharge frame in the present invention;

[0041] Figure 5 for Figure 4 A magnified view of point A in the figure;

[0042] Figure 6 Schematic diagram of the structure of the bidirectional threaded rod in the present invention;

[0043] Figure 7 for Figure 6 Enlarged view of point B in FIG.

[0044] Figure 8 Schematic diagram of the structure of the scraper plate in the present invention;

[0045] Figure 9 Schematic diagram of the structure of the shell in the present invention;

[0046] Figure 10 It is a cross-sectional structural diagram of the dust collection hood of the present invention;

[0047] Figure 11 It is a cross-sectional structural diagram of the housing in the present invention;

[0048] Figure 12 for Figure 11 Enlarged view of point C in the figure;

[0049] Figure 13 It is a cross-sectional structural diagram of the frame in the present invention.

[0050] 1. Bottom plate; 2. Storage frame; 3. Frame plate; 4. Coating mechanism; 41. Discharge pipe; 42. Fixed plate; 43. Discharge frame; 44. Barrier strip; 45. Through slot; 46. Track frame; 47. Moving block; 48. Extension plate; 49. First electric push rod; 491. Scraper plate; 492. Overflow chute; 493. Box body; 494. Positioning plate; 495. Hopper; 496. First threaded block; 497. Connecting plate; 498. Cleaning plate; 499. L-shaped plate; 481. Bidirectional threaded rod; 482. Auxiliary plate; 483. Baffle; 484. Second threaded block; 485. Push-pull plate; 486. Discharge port; 487. First motor; 488. First bevel gear; 489. Second bevel gear; 471. Pump body; 472. Second pipeline; 473. Feeding pipe; 474, mounting plate; 475, threaded adjustment rod; 476, second motor; 477, second electric push rod; 478, discharge pipe; 5, cleaning mechanism; 51, housing; 52, first vertical plate; 53, second vertical plate; 54, cleaning roller; 55, bristles; 56, third motor; 57, drainage pipe; 58, dust collection hood; 59, scraper; 591, first gear; 592, sealing door; 593, first fan; 594, annular mesh plate; 595, cleaning plate; 596, fourth motor; 597, second gear; 598, gear ring; 599, first dustproof net; 6, drying assembly; 61, frame; 62, second fan; 63, heating wire; 64, air guide cover; 65, heat exhaust hole; 66, support plate; 67, second dustproof net; 7, long plate; 8, guide roller. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1 -Attached Figure 13 The present invention is described in further detail.

[0052] The present invention discloses a coating device for a heat-sensitive label paper substrate. Figures 1-13 , including a bottom plate 1, a storage frame 2 is fixedly connected to the top of the bottom plate 1, a frame plate 3 is fixedly connected to the top of the bottom plate 1, the storage frame 2 is arranged on the inner side of the frame plate 3, a coating mechanism 4 is provided on the frame plate 3, the coating mechanism 4 includes a discharge pipe 41, the discharge pipe 41 is arranged on the inner side of the frame plate 3, a fixed plate 42 is fixedly connected between the discharge pipe 41 and the frame plate 3, two discharge frames 43 are fixedly connected to the bottom of the discharge pipe 41, a barrier strip 44 is fixedly connected to the inside of the discharge frame 43, and a through slot 45 is opened on the barrier strip 44;

[0053] A track frame 46 is fixedly connected to the top of the frame plate 3, a moving block 47 is slidably connected to the inner side of the track frame 46, an extension plate 48 is fixedly connected to one side of the moving block 47, a first electric push rod 49 is fixedly connected to the extension plate 48, a scraper plate 491 is fixedly connected to one end of the first electric push rod 49, the scraper plate 491 is arranged on one side of the discharge pipe 41, an overflow trough 492 is integrally formed on the scraper plate 491, a box body 493 is provided on the rear side of the storage frame 2, a positioning plate 494 is fixedly connected between the box body 493 and the storage frame 2, a material receiving hopper 495 is fixedly connected to the top of the box body 493, a first threaded block 496 is slidably connected to the scraper plate 491, and a connecting plate 497 is fixedly connected to the outer side of the first threaded block 496;

[0054] One end of the connecting plate 497 is fixedly connected to a cleaning plate 498, which extends into the overflow trough 492 and matches the overflow trough 492. When the coating operation is performed, the coating material is discharged onto the thermal paper through the discharge frame 43, and the barrier strips 44 divide the opening of the discharge frame 43. The barrier strips 44 between the two discharge frames 43 are staggered with each other, so the coating material forms a spatial complementary effect after being discharged through the two discharge frames 43, which can effectively cover the surface of the thermal paper. When the coating area passes through the scraper plate 491, the scraper plate 491 spreads and flattens the coating material to ensure the coating quality. After scraping, the excess material accumulates in the overflow trough 492 and is pushed into the box body 493 for storage through the cleaning plate 498, so that the excess material can be recycled to avoid waste of resources and save costs.

[0055] Two L-shaped plates 499 are provided at the bottom of the discharge pipe 41. The two L-shaped plates 499 are respectively provided on the left and right sides of the discharge frame 43. One side of the L-shaped plate 499 is fixedly connected to the side wall of the two discharge frames 43. A bidirectional threaded rod 481 is rotatably connected between the two L-shaped plates 499. The bidirectional threaded rod 481 is provided between the two discharge frames 43. An auxiliary plate 482 is provided on one side of the L-shaped plate 499. Two baffles 483 are fixedly connected to the bottom of the auxiliary plate 482.

[0056] The baffle 483 extends into the through groove 45 and matches the through groove 45. Two second threaded blocks 484 are provided on the outside of the bidirectional threaded rod 481. A push-pull plate 485 is fixedly connected to one side of the second threaded block 484. The push-pull plate 485 passes through the L-shaped plate 499. One end of the push-pull plate 485 is fixedly connected to the auxiliary plate 482. The barrier strips 44 are arranged at equal intervals inside the discharge frame 43. A discharge port 486 is provided on the discharge pipe 41. The discharge port 486 is connected to the discharge frame 43. A rectangular plate is fixedly connected between the two discharge frames 43. After the second threaded block 484 moves, it drives the push-pull plate 485 to move.

[0057] The bidirectional threaded rod 481 passes through the two second threaded blocks 484 in sequence, and the bidirectional threaded rod 481 is respectively connected to the two second threaded blocks 484 by threads. The bottom of the rectangular plate is fixedly connected to the first motor 487, and the first motor 487 is fixedly connected to the first bevel gear 488 through the output shaft. The outside of the bidirectional threaded rod 481 is fixedly connected to the second bevel gear 489, and the second bevel gear 489 is arranged on the top of the first bevel gear 488. The first bevel gear 488 is meshed with the second bevel gear 489. The threads at both ends of the bidirectional threaded rod 481 are in opposite directions, which can drive the two second threaded blocks 484 to move toward or away from each other.

[0058] A pump body 471 is fixedly connected to the top of the base plate 1, and a first pipe is fixedly connected to the input end of the pump body 471, one end of the first pipe is fixedly connected to a side wall of the storage frame 2, and a second pipe 472 is fixedly connected to the output end of the pump body 471, and one end of the second pipe 472 is fixedly connected to one end of the discharge pipe 41. A filling pipe 473 is fixedly connected to the top of the storage frame 2, and an end cover is provided on the top of the filling pipe 473, which extends into the interior of the filling pipe 473 and matches the filling pipe 473. The material inside the storage frame 2 is injected through the filling pipe 473.

[0059] One side of the scraper plate 491 is fixedly connected to two mounting plates 474, and a threaded adjusting rod 475 is rotatably connected between the two mounting plates 474. One side of one mounting plate 474 is fixedly connected to a second motor 476, and the second motor 476 is fixedly connected to one end of the threaded adjusting rod 475 through an output shaft. The threaded adjusting rod 475 passes through the first threaded block 496 and is threadedly connected to the first threaded block 496. A second electric push rod 477 is fixedly connected to a side wall of the track frame 46, and one end of the second electric push rod 477 is fixedly connected to one side of the moving block 47. The top of the scraper plate 491 is fixedly connected to a limit plate, which passes through the extension plate 48. The bottom of the box body 493 is fixedly connected to a discharge pipe 478, and a valve is provided on the discharge pipe 478. After the threaded adjusting rod 475 rotates, it drives the first threaded block 496 to move horizontally.

[0060] A cleaning mechanism 5 is provided on the top of the bottom plate 1. The cleaning mechanism 5 includes a shell 51, which is fixedly connected to the top of the bottom plate 1. A first vertical plate 52 is fixedly connected to the top of the bottom plate 1. A second vertical plate 53 is fixedly connected to the top of the shell 51. A cleaning roller 54 is rotatably connected between the first vertical plate 52 and the second vertical plate 53. Bristles 55 are fixedly connected to the outside of the cleaning roller 54. A U-shaped plate is fixedly connected to one side of the first vertical plate 52.

[0061] A third motor 56 is fixedly connected to one side of the U-shaped plate. The third motor 56 is fixedly connected to one end of one of the cleaning rollers 54 through an output shaft. Two drainage pipes 57 are fixedly connected to the top of the shell 51. One end of the two drainage pipes 57 is integrally formed with a dust collection cover 58. The two cleaning rollers 54 extend into the interior of the two dust collection covers 58 respectively. The inside of the two dust collection covers 58 is fixedly connected to a dust scraper 59. During the rotation of the cleaning rollers 54, the bristles 55 brush away the dust on the surface of the thermal paper substrate.

[0062] The outside of the two cleaning rollers 54 are fixedly connected to the first gear 591, and the two first gears 591 are meshed with each other. A sealing door 592 is provided on one side wall of the shell 51, and the sealing door 592 is connected to the shell 51 by a hinge. The inside of the shell 51 is rotatably connected to the first fan 593, and the inside of the shell 51 is rotatably connected to the annular mesh plate 594, which is provided on the outside of the first fan 593. A dust cleaning plate 595 is fixedly connected to one side wall of the inner cavity of the shell 51, and the dust cleaning plate 595 is in contact with the outside of the annular mesh plate 594. A fourth motor 596 is fixedly connected to the outside of the shell 51, and the fourth motor 596 is fixedly connected to the second gear 597 through the output shaft. A gear ring 598 is fixedly connected to the outside of the annular mesh plate 594, and the second gear 597 is meshed with the gear ring 598. A first dustproof net 599 is fixedly connected to one side wall of the shell 51, and the cleaned dust is sucked into the inside of the shell 51 by the first fan 593.

[0063] A drying assembly 6 is also provided on the top of the base plate 1. The drying assembly 6 includes a frame 61, which is provided on the top of the base plate 1. A second fan 62 is fixedly connected to the inside of the frame 61. A heating wire 63 is fixedly connected to the inside of the frame 61. The heating wire 63 is provided at the bottom of the second fan 62. A deflector 64 is fixedly connected to one side wall of the frame 61. A heat exhaust hole 65 is provided on one side wall of the frame 61. The heat exhaust hole 65 is connected to the deflector 64. Two support plates 66 are fixedly connected to the top of the base plate 1. The frame 61 is fixedly connected to the two support plates 66 respectively. A second dustproof net 67 is fixedly connected to the top of the frame 61. The airflow generated during the drying process enters the deflector 64 through the heat exhaust hole 65 and is discharged from the opening of the deflector 64, thereby preheating the coating area on the thermal paper substrate.

[0064] Two long plates 7 are fixedly connected to the top of the bottom plate 1 , and a guide roller 8 is rotatably connected between the two long plates 7 , and the guide roller 8 guides and conducts the thermal paper.

[0065] Another technical problem to be solved by the present invention is to provide a coating method of a coating device for a thermal label paper substrate, comprising the following steps:

[0066] S1. Dust cleaning

[0067] The thermal label paper substrate is unwound and reeled by the rewinding transmission device, which is not shown in the figure, and is coated during the rewinding process. This unwinding and rewinding process is a prior art and will not be further described here. During coating, the thermal label paper substrate to be coated first passes between the two cleaning rollers 54. At this time, the third motor 56 works and drives the connected cleaning roller 54 to rotate. The cleaning roller 54 drives the connected first gear 591 to rotate, and the first gear 591 drives the other first gear 591 to rotate. At this time, both cleaning rollers 54 start to rotate. The cleaning roller 54 drives the brush bristles 55 to rotate and brush away the dust on the surface of the thermal label paper substrate, thereby achieving the purpose of cleaning and avoiding the situation where the quality of subsequent coating is reduced due to the presence of dust.

[0068] On the basis of the above-mentioned cleaning of the thermal paper substrate by the bristles 55, in order to prevent the bristles 55 from being dusty and causing a decrease in the subsequent cleaning function, the first fan 593 generates an airflow after the bristles 55 are in operation. When the bristles 55 pass through the dust scraper 59, the dust scraper 59 knocks off the dust on the bristles 55. The dust knocked off passes through the drainage pipe 57 and enters the interior of the housing 51 for collection.

[0069] When dust enters the interior of the shell 51, it will fall on the outside of the annular mesh plate 594 due to the attraction of the first fan 593. In order to prevent the dust from clogging the gaps on the annular mesh plate 594, the fourth motor 596 will work and drive the second gear 597 to rotate, and the second gear 597 drives the ring gear 598 to rotate, and the ring gear 598 drives the annular mesh plate 594 to rotate. As the annular mesh plate 594 rotates, the cleaning plate 595 scrapes off the dust accumulated on the annular mesh plate 594, thereby achieving a cleaning effect on the annular mesh plate 594. Finally, the dust falls down to the bottom of the shell 51 and accumulates. After the user opens the sealing door 592, the collected dust can be cleaned out.

[0070] S2. Coating process

[0071] The barrier strips 44 inside the two discharge frames 43 are staggered with each other, that is, after the coated material is discharged downward through the bottom opening of the discharge frame 43, the gaps between the materials discharged by a single discharge frame 43 complement the materials discharged by the other discharge frame 43, so as to improve uniform and comprehensive coverage of the discharge. The discharge frame 43 is set to be wide at the top and narrow at the bottom, which can promote the material to fully cover the lower space of the discharge frame 43 when entering the lower part of the discharge frame 43. The materials between different barrier strips 44 can also be complemented by the through grooves 45, thereby effectively avoiding the situation where less material is discharged at a certain place during discharge, resulting in uneven discharge.

[0072] After the first motor 487 is working, it drives the first bevel gear 488 to rotate, the first bevel gear 488 drives the second bevel gear 489 to rotate, the second bevel gear 489 drives the bidirectional threaded rod 481 to rotate, the bidirectional threaded rod 481 drives the two second threaded blocks 484 to move toward or away from each other, the second threaded block 484 drives the push-pull plate 485 to move, the push-pull plate 485 drives the auxiliary plate 482 to move, and the auxiliary plate 482 drives the two connected baffles 483 to move, thereby adjusting the depth of the baffle 483 inserted into the discharge frame 43, and then adjusting the overall blanking width to meet the coating requirements of thermal paper substrates of different widths, and having a wider range of uses;

[0073] During coating, the pump body 471 works to extract the coating material in the storage frame 2 to the position of the discharge pipe 41, and enters the discharge frame 43 through the discharge pipe 41, and finally is discharged onto the thermal paper substrate through the discharge frame 43. When the area with coating material passes through the scraper plate 491, the scraper plate 491 scrapes and flattens the coating material, thereby improving the flatness and integrity during coating.

[0074] In the process of scraping the coating material by the scraper plate 491, the overly thick material will be stacked upwards as the scraper plate 491 scrapes and accumulates, and eventually enters the overflow trough 492. When the material in the overflow trough 492 accumulates more, the second electric push rod 477 works and pushes and pulls the moving block 47, and the moving block 47 drives the extension plate 48 to move, and the extension plate 48 drives the first electric push rod 49 to move. After the first electric push rod 49 moves, it drives one end of the scraper plate 491 to move toward the position of the receiving hopper 495. When one side of the scraper plate 491 moves to the top of the receiving hopper 495, , the second motor 476 drives the threaded adjustment rod 475 to rotate, the threaded adjustment rod 475 drives the first threaded block 496 to move, the first threaded block 496 drives the connecting plate 497 to move, the connecting plate 497 drives the cleaning plate 498 to move, and the cleaning plate 498 scrapes the material on the overflow chute 492 and the cleaning plate 498 to the position of the receiving hopper 495 during the movement. After passing through the receiving hopper 495, the material enters the interior of the box body 493 for collection, thereby ensuring the coating flatness and also recycling the excess material, thereby reducing resource waste and saving processing costs;

[0075] S3, drying and heating

[0076] When the coated area passes through the frame 61, the heating wire 63 is powered on and heated, and the second fan 62 works and generates airflow. The airflow is heated into hot airflow when passing through the heating wire 63. The hot airflow is blown to the surface of the thermal paper substrate to form a drying effect. During drying, after contacting the surface of the thermal paper substrate, it enters the guide cover 64 through the heat exhaust hole 65 and is discharged through an opening on one side of the guide cover 64, thereby conducting the heat during drying, so as to preheat the coated area that has not been dried, so as to avoid the possibility of cracking when the coated area is directly subjected to high-temperature drying. Finally, the dried thermal paper substrate passes around the guide roller 8 and is transferred outward to undergo the next processing step.

[0077] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coating device for a thermal label paper substrate, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a material storage frame (2), the top of the bottom plate (1) is fixedly connected to a frame plate (3), the material storage frame (2) is arranged on the inner side of the frame plate (3), and a coating mechanism (4) is arranged on the frame plate (3); The coating mechanism (4) includes a discharge pipe (41), the discharge pipe (41) is arranged on the inner side of the frame plate (3), a fixed plate (42) is fixedly connected between the discharge pipe (41) and the frame plate (3), two discharge frames (43) are fixedly connected to the bottom of the discharge pipe (41), a barrier strip (44) is fixedly connected inside the discharge frame (43), a through slot (45) is provided on the barrier strip (44), a track frame (46) is fixedly connected to the top of the frame plate (3), a moving block (47) is slidably connected to the inner side of the track frame (46), one side of the moving block (47) is fixedly connected to an extension plate (48), the extension plate (48) is fixedly connected to a first electric push rod (49), one end of the first electric push rod (49) is fixedly connected to A scraper plate (491), the scraper plate (491) is arranged on one side of the discharge pipe (41), an overflow trough (492) is integrally formed on the scraper plate (491), a box body (493) is provided on the rear side of the storage frame (2), a positioning plate (494) is fixedly connected between the box body (493) and the storage frame (2), a receiving hopper (495) is fixedly connected to the top of the box body (493), a first threaded block (496) is slidably connected to the scraper plate (491), a connecting plate (497) is fixedly connected to the outside of the first threaded block (496), a cleaning plate (498) is fixedly connected to one end of the connecting plate (497), and the cleaning plate (498) extends into the overflow trough (492) and matches the overflow trough (492); Two L-shaped plates (499) are provided at the bottom of the discharge pipe (41), and the two L-shaped plates (499) are respectively provided on the left and right sides of the discharge frame (43). One side of the L-shaped plate (499) is fixedly connected to the side wall of the two discharge frames (43). A bidirectional threaded rod (481) is rotatably connected between the two L-shaped plates (499), and the bidirectional threaded rod (481) is provided between the two discharge frames (43). An auxiliary plate (482) is provided on one side of the L-shaped plate (499). The auxiliary plate (482) is fixedly connected to two baffles (483) at the bottom. The baffles (483) extend into the through slot (45) and match the through slot (45). Two second threaded blocks (484) are provided on the outside of the bidirectional threaded rod (481). One side of the second threaded block (484) is fixedly connected to a push-pull plate (485). The push-pull plate (485) passes through the L-shaped plate (499). One end of the push-pull plate (485) is fixed to the auxiliary plate (482). The barrier strips (44) are arranged at equal intervals inside the discharge frame (43), and the barrier strips (44) between the two discharge frames (43) are staggered. A discharge port (486) is provided on the discharge pipe (41), and the discharge port (486) is connected to the discharge frame (43). A rectangular plate is fixedly connected between the two discharge frames (43). The bidirectional threaded rod (481) passes through the two second threaded blocks (484) in sequence, and the bidirectional threaded rod (481) is respectively connected to the two second threaded blocks (484) by threads. A first motor (487) is fixedly connected to the bottom of the rectangular plate, and the first motor (487) is fixedly connected to the first bevel gear (488) through the output shaft. The bidirectional threaded rod (481) is fixedly connected to the outside of the second bevel gear (489), and the second bevel gear (489) is arranged on the top of the first bevel gear (488), and the first bevel gear (488) is meshed with the second bevel gear (489); One side of the scraper plate (491) is fixedly connected to two mounting plates (474), and a threaded adjustment rod (475) is rotatably connected between the two mounting plates (474). One side of one mounting plate (474) is fixedly connected to a second motor (476), and the second motor (476) is fixedly connected to one end of the threaded adjustment rod (475) through an output shaft. The threaded adjustment rod (475) passes through the first threaded block (496) and is threadedly connected to the first threaded block (496). A second electric push rod (477) is fixedly connected to a side wall of the track frame (46), and one end of the second electric push rod (477) is fixedly connected to one side of the moving block (47). The top of the scraper plate (491) is fixedly connected to a limit plate, and the limit plate passes through the extension plate (48). The bottom of the box body (493) is fixedly connected to a discharge pipe (478), and a valve is provided on the discharge pipe (478).

2. The coating device for a thermal label paper substrate according to claim 1, characterized in that: The top of the bottom plate (1) is fixedly connected to a pump body (471), an input end of the pump body (471) is fixedly connected to a first pipe, one end of the first pipe is fixedly connected to a side wall of the material storage frame (2), an output end of the pump body (471) is fixedly connected to a second pipe (472), one end of the second pipe (472) is fixedly connected to one end of the discharge pipe (41), and a material injection pipe (473) is fixedly connected to the top of the material storage frame (2), an end cover is provided on the top of the material injection pipe (473), and the end cover extends into the interior of the material injection pipe (473) and matches the material injection pipe (473).

3. The coating device for a thermal label paper substrate according to claim 1, characterized in that: A cleaning mechanism (5) is provided on the top of the bottom plate (1), and the cleaning mechanism (5) comprises a shell (51), the shell (51) is fixedly connected to the top of the bottom plate (1), a first vertical plate (52) is fixedly connected to the top of the bottom plate (1), a second vertical plate (53) is fixedly connected to the top of the shell (51), a cleaning roller (54) is rotatably connected between the first vertical plate (52) and the second vertical plate (53), a brush (55) is fixedly connected to the outside of the cleaning roller (54), and the first vertical plate (5 2) A U-shaped plate is fixedly connected to one side, and a third motor (56) is fixedly connected to one side of the U-shaped plate. The third motor (56) is fixedly connected to one end of one of the cleaning rollers (54) through an output shaft. Two drainage tubes (57) are fixedly connected to the top of the shell (51). One end of each of the two drainage tubes (57) is integrally formed with a dust cover (58). The two cleaning rollers (54) extend into the interior of the two dust covers (58), and the inside of the two dust covers (58) is fixedly connected to a dust scraping plate (59).

4. The coating device for a thermal label paper substrate according to claim 3, characterized in that: The two cleaning rollers (54) are fixedly connected to the outside with a first gear (591), and the two first gears (591) are meshed with each other. A sealing door (592) is provided on one side wall of the housing (51), and the sealing door (592) is connected to the housing (51) through a hinge. The housing (51) is rotatably connected to a first fan (593), and the housing (51) is rotatably connected to an annular mesh plate (594), and the annular mesh plate (594) is provided on the outside of the first fan (593). A dust cleaning plate (595) is fixedly connected to one side wall of the cavity, and the dust cleaning plate (595) contacts the outside of the annular mesh plate (594). A fourth motor (596) is fixedly connected to the outside of the shell (51), and the fourth motor (596) is fixedly connected to the second gear (597) via an output shaft. A gear ring (598) is fixedly connected to the outside of the annular mesh plate (594), and the second gear (597) is meshed with the gear ring (598). A first dustproof net (599) is fixedly connected to one side wall of the shell (51).

5. The coating device for a thermal label paper substrate according to claim 1, characterized in that: A drying assembly (6) is further provided on the top of the bottom plate (1), and the drying assembly (6) includes a frame (61), the frame (61) is provided on the top of the bottom plate (1), a second fan (62) is fixedly connected inside the frame (61), a heating wire (63) is fixedly connected inside the frame (61), and the heating wire (63) is provided at the bottom of the second fan (62), a flow guide cover (64) is fixedly connected on one side wall of the frame (61), a heat exhaust hole (65) is provided on one side wall of the frame (61), and the heat exhaust hole (65) is communicated with the flow guide cover (64), two support plates (66) are fixedly connected to the top of the bottom plate (1), the frame (61) is fixedly connected to the two support plates (66) respectively, and a second dustproof net (67) is fixedly connected to the top of the frame (61).

6. The coating device for a thermal label paper substrate according to claim 1, characterized in that: Two long plates (7) are fixedly connected to the top of the bottom plate (1), and a guide roller (8) is rotatably connected between the two long plates (7).

7. The coating method of a thermal label paper substrate coating device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Dust cleaning During coating, when the thermal paper substrate passes between the two cleaning rollers (54), the two cleaning rollers (54) are controlled to rotate and clean dust on the surface of the substrate; S2. Coating process After the substrate passes under the discharge frame (43), the coated material is discharged through the bottom opening of the discharge frame (43) and falls onto the substrate. When the coated area passes through the scraper plate (491), the scraper plate (491) scrapes and flattens the material in the coated area. S3, drying and heating When the coated area passes through the frame (61), the airflow generated by the second fan (62) is heated into a hot airflow when passing through the heating wire (63), and blown toward the coated area to achieve the purpose of drying.

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