A thermal paper uniform coating processing equipment

Abstract

The application belongs to the technical field of heat-sensitive paper and specifically discloses a kind of heat-sensitive paper uniform coating processing equipment, including two sets of equipment side metal plate, the bottom of two equipment side metal plate is fixedly connected with bottom hollow metal plate by welding, a plurality of ventilation holes are formed in the equipment side metal plate, the ventilation holes are evenly distributed on the equipment side metal plate, the similar side of two equipment side metal plates is provided with a composite feeding mechanism at the front end, the similar side of two equipment side metal plates is provided with a glue brushing mechanism, the similar side of two equipment side metal plates is provided with a tension control mechanism a, the application, double tension control mechanism cooperates and regulates material tension, solves the problem that coating and composite pressure synergy is poor, reduces coating defect; coating mechanism accurately proportioned mixed material and uniformly coats, improves coating uniformity; cooling and infrared curing linkage, enhances coating adhesion and heat-sensitive performance.

Description

Technical Field

[0001] This invention belongs to the field of thermal paper technology, and specifically relates to a thermal paper uniform coating processing equipment. Background Technology

[0002] With the rapid development of industries such as new retail, logistics and express delivery, and healthcare, thermal paper, a special type of paper that can achieve instant printing without ink, has been widely used in scenarios such as invoice printing, labeling, and medical records, and its market demand continues to rise. The core performance of thermal paper depends on the uniformity, adhesion, and thermal sensitivity of the surface thermal coating, and thermal paper coating equipment is the key equipment for realizing this core process, directly determining the product quality and production efficiency of thermal paper.

[0003] This type of equipment typically consists of an unwinding unit, a coating unit, a drying unit, a laminating unit, and a rewinding unit. The coating unit uses methods such as doctor blades and roller coating to evenly coat the surface of the base paper. The drying unit uses technologies such as hot air and infrared to remove the solvent from the coating. The laminating unit combines the coated thermal layer with other substrates according to requirements, ultimately forming a composite thermal paper product with specific functions. It is an indispensable core link in the thermal paper production chain.

[0004] While current thermal paper coating equipment has reached a certain level of maturity in single coating processes, its comprehensive processing capabilities are still significantly insufficient in the context of composite thermal paper production. The coating accuracy and composite pressure control of the equipment lack coordination, and the thermal coating output by the coating unit is prone to uneven local pressure during lamination due to thickness fluctuations, which in turn leads to problems such as coating wrinkles, bubbles, or insufficient peel strength. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a uniform coating processing device for thermal paper.

[0006] To achieve the above objectives, the present invention provides a thermal paper uniform coating processing device, comprising two sets of side metal plates. A bottom hollow metal plate is welded and fixedly connected to the bottom of the two side metal plates. Multiple ventilation holes are evenly distributed on the side metal plates. A composite feeding mechanism is provided at the front end of the two adjacent sides of the two side metal plates. A glue-applying mechanism is provided at the adjacent sides of the two side metal plates. Tension control mechanism a and tension control mechanism b are provided at the adjacent sides of both side metal plates. A material receiving mechanism and a cooling mechanism are provided at the rear end of the two adjacent sides of the two side metal plates. A coating mechanism is provided at the top of the bottom hollow metal plate.

[0007] In the above technical solution, the composite feeding mechanism further includes a feeding roller a and a feeding roller b. The two ends of the feeding roller a are rotatably connected to the adjacent sides of the two side metal plates of the equipment. The two ends of the feeding roller b are rotatably connected to mounting bases a. The two mounting bases a are fixedly connected to the adjacent sides of the side metal plates of the equipment. A guide roller a is rotatably connected to the adjacent sides of the two side metal plates of the equipment. A guide roller b is rotatably connected to the adjacent sides of the two side metal plates of the equipment, i.e., below the guide roller a. Multiple correction rollers a are rotatably connected to the adjacent sides of the two side metal plates of the equipment. A thermally sensitive layer material is disposed on the outside of the feeding roller a. The thermally sensitive layer material surrounds and passes sequentially around the multiple correction rollers a and the guide roller a above. A thin film material is disposed on the outside of the feeding roller b. The thin film material surrounds and passes sequentially around the multiple correction rollers a and the guide roller b below.

[0008] This composite feeding mechanism can achieve orderly conveying of two materials, and the correction structure can prevent material deviation, ensuring the stability of the material posture before composite, and improving the accuracy and yield of subsequent composite processes.

[0009] In the above technical solution, the glue application mechanism further includes a mounting plate a, which is externally fixedly connected to the inside of one of the side metal plates of the equipment. A rotating shaft is rotatably connected inside the mounting plate a, and a glue application roller is fixedly connected to the outside of the rotating shaft. A filling port is provided on one side of the glue application roller, and multiple glue outlet grooves are opened on the outside of the glue application roller. A drive motor is installed on the outside of the mounting plate a, and the drive end of the drive motor is fixedly connected to one side of the rotating shaft to drive the rotating shaft to rotate.

[0010] This glue application mechanism can achieve automated and uniform glue application, with multiple glue dispensing grooves to ensure consistent glue application. Its compact structure is adapted to the internal space of the equipment, improving the efficiency and stability of the glue application process.

[0011] In the above technical solution, the tension control mechanism a further includes two cylinders a and two short-pitch guide rails. The cylinders a are externally mounted on the inner wall of the metal plate on the side of the equipment, and the short-pitch guide rails are externally mounted on the inner wall of the metal plate on the side of the equipment. A sliding guide block is slidably connected inside the short-pitch guide rail. The sliding guide block is externally fixedly connected to the drive end of the cylinder a. A bearing is rotatably connected inside the sliding guide block. Tension rollers a are arranged inside the two bearings. The tension control mechanism a adjusts the tension of the heat-sensitive layer material.

[0012] This tension control mechanism can precisely adjust the position of the tension roller, and the guide rail ensures the stability of movement. It can adapt to changes in material tension in real time, prevent stretching and loosening, and effectively improve the processing quality of subsequent composite processes.

[0013] In the above technical solution, the tension control mechanism b further includes two mounting plates b and two fixed shafts a. The outer side of the mounting plate b is fixedly connected to the outer wall of the metal plate on the side of the equipment. A cylinder b is fixedly connected to the bottom of the mounting plate b. The outer side of the two fixed shafts a is installed on the inner side of the metal plate on the side of the equipment. A T-shaped connecting arm is rotatably connected to the outer side of the fixed shaft a. The short rod part of the T-shaped connecting arm is rotatably connected to the drive end of the cylinder b. A tension roller b is rotatably connected to the adjacent side of the two T-shaped connecting arms.

[0014] This tension control mechanism uses a cylinder to drive the connecting arm and link the tension roller, which can flexibly adjust the material tension. The hinged structure ensures smooth movement, adapts to different working conditions, prevents material from loosening or breaking, and improves the stability of conveying.

[0015] In the above technical solution, the receiving mechanism further includes two pressing rollers and three straightening rollers b. The two ends of the two pressing rollers are rotatably connected to the inner side of the metal plate on the side of the equipment, and the two ends of the three straightening rollers are rotatably connected to the inner side of the metal plate on the side of the equipment. A receiving bracket is fixedly connected to the rear end of the bottom hollow metal plate. Two mounting bases b are installed in the middle of the receiving bracket. Receiving rollers are rotatably connected inside the two mounting bases b. Two placement racks are provided inside the receiving bracket, and an infrared curing device is provided on the top of the two placement racks.

[0016] This receiving mechanism can simultaneously complete material compaction, correction, and solidification, ensuring material uniformity, accelerating finished product shaping, and significantly improving overall processing efficiency and finished product quality.

[0017] In the above technical solution, the outer part of the take-up roller is further wound with thermal paper composite material, which is composed of thermal layer material and film material, and passes through the pressing roller, the correction roller b, and the interior of the bottom hollow metal plate in sequence, and is finally wound on the take-up roller.

[0018] In the above technical solution, the cooling mechanism further includes two cylinders c and two fixed shafts b. The cylinders c are fixedly connected to the inside of the metal plate on the side of the equipment. The fixed shafts b are rotatably connected to the inside of the metal plate on the side of the equipment. A rotating arm is fixedly connected to the outside of the fixed shafts b. The bottom of the rotating arm is rotatably connected to the drive end of the cylinders c. A rotating forearm is rotatably connected to the top of the rotating arm.

[0019] This cooling mechanism has a boom hinged at the bottom to the cylinder drive end and a rotating arm hinged at the top. The cylinder can drive the boom to flexibly adjust its position, and the hinged structure ensures smooth movement. It can adapt to the cooling needs of materials of different specifications and improve the adaptability and stability of the cooling process.

[0020] In the above technical solution, a fixed cooling pipe is fixedly connected to one side of the two rotating arms, an adjusting bolt is provided on one side of the rotating arms, and a movable connecting pipe is slidably connected to one side of the two rotating arms.

[0021] In the above technical solution, the coating mechanism further includes a pigment box and an anti-blocking agent storage tank. The bottom of the pigment box is located on the top of the bottom hollow metal plate, and the bottom of the anti-blocking agent storage tank is located on the top of the bottom hollow metal plate. A pump is installed on the top of the pigment box, and a main pipe is fixedly connected to the drive end of the pump. A siphon pipe is provided between the anti-blocking agent storage tank and the main pipe. Multiple branch pipes are fixedly connected to the opening of the main pipe, and a spraying scraper is fixedly connected to the output end of the multiple branch pipes. The outside of the spraying scraper is fixedly connected to the top of the bottom hollow metal plate, and the material sprayed by the spraying scraper adheres to the thermal paper composite material passing through the inside of the bottom hollow metal plate.

[0022] The coating unit is equipped with a pigment tank, an anti-blocking agent storage tank, and a spraying assembly. Both are located on top of a hollow metal plate at the bottom. The pigment tank pump is connected to the main pipeline, and the siphon pipeline realizes the automatic mixing of anti-blocking agent and pigment. The main pipeline has multiple branches connected to spraying scrapers, which can coat the mixture onto the thermal paper composite material. It can accurately measure the materials, and the multi-branch nozzles ensure uniform coating. The anti-blocking design improves the quality of the finished product.

[0023] Compared with the prior art, the present invention has the following beneficial effects: This invention employs a dual tension control mechanism to collaboratively regulate material tension, resolving the issue of poor coordination between coating and lamination pressure and reducing coating defects; the coating mechanism precisely proportions and uniformly coats the mixture, improving coating uniformity; and the linkage between cooling and infrared curing enhances coating adhesion and thermal sensitivity. Attached Figure Description

[0024] Figure 1 This is a perspective view of the invention. Figure 2 This is a schematic diagram of the front end of the device proposed in this invention; Figure 3 This is a schematic diagram of the composite feeding mechanism proposed in this invention; Figure 4 This is a schematic diagram of the adhesive application mechanism proposed in this invention; Figure 5 This is a schematic diagram of the tension control mechanism a proposed in this invention; Figure 6 This is a schematic diagram of the tension control mechanism b proposed in this invention; Figure 7 This is a schematic diagram of the rear section of the device proposed in this invention; Figure 8 This is a schematic diagram of the material receiving mechanism proposed in this invention; Figure 9 This is a schematic diagram of the cooling mechanism proposed in this invention; Figure 10 This is a schematic diagram of the coating mechanism proposed in this invention.

[0025] In the diagram: 1. Side metal plate of the equipment; 2. Hollow metal plate at the bottom; 3. Ventilation hole; 4. Composite feeding mechanism; 41. Feeding roller a; 42. Feeding roller b; 43. Mounting base a; 44. Guide roller a; 45. Guide roller b; 46. Correcting roller a; 47. Thermal layer material; 48. Film material; 5. Glue application mechanism; 51. Mounting plate a; 52. Rotating shaft; 53. Glue application roller; 54. Feeding port; 55. Glue outlet; 56. Drive motor; 6. Tension control mechanism a; 61. Cylinder a; 62. Short-distance guide rail; 63. Sliding guide block; 64. Bearing; 65. Tension roller a; 7. Tension control mechanism b; 71. Mounting plate b; 72. Cylinder b; 73. 74. Fixed shaft; 75. T-shaped connecting arm; 86. Tension roller; 97. Receiving mechanism; 10. Pressing roller; 11. Correcting roller; 12. Thermal paper composite material; 13. Receiving bracket; 14. Mounting base; 15. Placement rack; 16. Receiving roller; 17. Cooling mechanism; 18. Cylinder; 19. Fixed shaft; 10. Rotating arm; 10. Rotating small arm; 10. Fixed cooling pipe; 11. Adjusting bolt; 12. Moving connecting pipe; 10. Coating mechanism; 101. Pigment box; 102. Anti-blocking agent storage tank; 103. Pump; 104. Main pipe; 105. Siphon pipe; 106. Branch pipe; 107. Spray scraper; 11. Infrared curing device. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1-10The thermal paper uniform coating processing equipment shown includes two sets of side metal plates 1. These metal plates serve as the core supporting components of the overall structure of the equipment, providing a stable installation benchmark and connection carrier for each functional mechanism of the equipment, ensuring the structural stability of the equipment during operation, and avoiding the impact of vibration and other factors on processing accuracy. Two side metal plates 1 are welded to the bottom of a hollow metal plate 2. The welded connection ensures the strength of the connection. The hollow metal plate 2 not only achieves a rigid connection between the two side metal plates 1, forming a stable support structure at the bottom of the equipment, but also reduces the overall weight of the equipment and facilitates the layout and maintenance of internal pipelines, providing a reliable guarantee for the stable placement of the equipment. Multiple ventilation holes 3 are provided on the side metal plates 1. These ventilation holes 3 can effectively promote air circulation between the inside and outside of the equipment, and timely dissipate the heat generated by various mechanisms during the operation of the equipment. This avoids the impact of excessive local temperature on the service life of equipment parts and the quality stability of thermal paper processing. The ventilation holes 3 are evenly distributed on the side metal plates 1. The even distribution design ensures that the ventilation and heat dissipation effect of each area on the side of the equipment is consistent, preventing the formation of local heat dissipation dead zones. A composite feeding mechanism 4 is set at the front end of the adjacent side of the two side metal plates 1. This mechanism is the core feeding unit for thermal paper processing. It is responsible for accurately and stably conveying the thermal layer material 47 and the film material 48 to the subsequent processing stage, laying the foundation for the accurate composite of the two materials.The composite feeding mechanism 4 includes a feeding roller a41 and a feeding roller b42. The two ends of the feeding roller a41 are rotatably connected to adjacent sides of two metal plates 1 on the side of the equipment. This rotatable connection allows the feeding roller a41 to rotate flexibly around its own axis, thus smoothly releasing the heat-sensitive layer material 47 wrapped around it, ensuring the continuity and stability of the heat-sensitive layer material 47 conveying. The two ends of the feeding roller b42 are rotatably connected to mounting bases a43. The mounting bases a43 provide stable mounting support for the feeding roller b42, ensuring its stable position during rotation and preventing the film material 48 from shifting due to shaking. The two mounting bases a43 are fixedly connected to adjacent sides of the metal plates 1 on the side of the equipment. A43 ensures a reliable connection between the feeding roller B42 and the main structure of the equipment, further enhancing the overall stability of the feeding mechanism. Guide roller A44 is rotatably connected to the adjacent side of the two side metal plates 1. Guide roller A44 primarily changes the conveying direction of the thermal layer material 47, guiding it from the correction roller A46 to the preset lamination position, ensuring the accuracy of the material conveying path. Guide roller B45 is rotatably connected to the adjacent side of the two side metal plates 1, below guide roller A44. Guide roller B45 works in conjunction with guide roller A44 to adjust the conveying direction of the film material 48, enabling precise docking of the film material 48 and the thermal layer material 47 at the same lamination station, facilitating subsequent lamination. The combined processing provides positional assurance. Multiple correction rollers a46 are rotatably connected to the adjacent sides of the metal plates 1 on both sides of the two devices. These correction rollers a46 are positional correction components during material conveying, capable of timely adjusting the thermal layer material 47 and film material 48 that have experienced positional deviations during conveying. Through their own slight rotation or fine-tuning, they pull the materials back onto the preset conveying path, ensuring that both materials always remain on the correct conveying trajectory and preventing material deviations from affecting subsequent coating and lamination quality. The thermal layer material 47 is disposed on the outside of the feeding roller a41. The thermal layer material 47 is the core functional layer that gives thermal paper its thermal properties. Its composition includes key substances such as thermal colorants, which determine the color development effect and performance of the thermal paper. The thermal layer material 47 surrounds and passes sequentially through multiple upper correction rollers a46 and guide rollers a44. Through the position correction of the correction rollers a46 and the direction guidance of the guide rollers a44, it is conveyed to the lamination process in a stable and precise manner. A film material 48 is set on the outside of the feeding roller b42. The film material 48 is mainly used to protect the thermal layer material 47 and prevent the thermal layer from being worn or contaminated by the external environment during subsequent processing or use. At the same time, some functional films can also improve the waterproof and oil-proof properties of the thermal paper. The film material 48 surrounds and passes sequentially through multiple lower correction rollers a46 and guide rollers b45. Under the synergistic action of the correction rollers a46 and guide rollers b45, it maintains a synchronous and precise conveying rhythm with the thermal layer material 47.

[0028] like Figures 4-5The feed roller b42 shown is surrounded by a film material 48. The film material 48 primarily protects the thermal layer material 47, preventing wear and contamination from the external environment during subsequent processing or use. Some functional films can also enhance the waterproof and oil-resistant properties of the thermal paper. The film material 48 surrounds and passes sequentially through multiple guiding rollers a46 and guide rollers b45 below. Under the synergistic action of the guiding rollers a46 and b45, it maintains a synchronized and precise feeding rhythm with the thermal layer material 47, creating conditions for perfect lamination. To ensure a good bonding foundation and stable feeding state between the thermal layer material 47 and the film material 48 during lamination, an adhesive application mechanism 5 is installed on the adjacent side of the metal plates 1 on both sides of the equipment. This mechanism is a key device for achieving precise bonding between the thermal layer and the film. By uniformly applying adhesive to the surface of the thermal layer or film, it ensures a firm lamination of the two materials. The glue application mechanism 5 includes a mounting plate a51, which serves as the basic mounting component of the glue application mechanism 5. The mounting plate a51 is externally fixedly connected to the interior of a metal plate 1 on one side of the device. This fixing method provides a stable mounting reference for all components of the glue application mechanism 5, preventing uneven glue application due to mechanism shaking during the application process. A rotating shaft 52 is rotatably connected inside the mounting plate a51. The rotating shaft 52 is the core component that transmits power and drives the glue application roller 53. Its rotatable connection with the mounting plate a51 ensures its own rotational flexibility. The glue application roller 53 is externally fixedly connected to the rotating shaft 52. The glue application roller 53 directly contacts the material surface to complete the glue application action. Its special surface texture further ensures the uniformity of glue application. A filling port 54 is provided on one side of the glue application roller 53. The filling port 54 is a channel for continuously replenishing glue to the glue application roller 53, ensuring the continuity of the glue application process and preventing interruption due to insufficient glue. The glue-applying roller 53 has multiple glue outlet grooves 55 on its exterior. These grooves divert and guide the glue, ensuring even distribution of the glue on the surface of the roller 53 and achieving uniform glue application to the material surface. A drive motor 56 is mounted on the outer side of the mounting plate a51. This drive motor 56 is the power source for the glue-applying mechanism 5, and its drive end is fixedly connected to one side of the rotating shaft 52. It drives the rotating shaft 52 to rotate, transmitting power to the glue-applying roller 53 to maintain a stable rotation speed and ensure consistent glue application. Simultaneously, tension control mechanisms a6 are installed on adjacent sides of the metal plates 1 on both sides of the equipment. These mechanisms are crucial for maintaining stable conveying of the heat-sensitive layer material 47. By adjusting the material tension in real time, they prevent the material from breaking due to excessive tension or wrinkling due to insufficient tension, thus ensuring processing quality. The tension control mechanism a6 includes two cylinders a61 and two short-pitch guide rails 62. The cylinders a61 serve as the power actuators for tension adjustment and are externally mounted on the inner wall of the metal plate 1 on the side of the equipment. This mounting method ensures the stability of the cylinders during operation.The short-distance guide rail 62 is externally mounted on the inner wall of the metal plate 1 on the side of the equipment. The short-distance guide rail 62 provides precise guiding constraints for the movement of the sliding guide block 63, preventing guide block misalignment from affecting tension adjustment accuracy. The linear power output from the drive end of cylinder a61 can push the sliding guide block 63 to move along the guide rail. The sliding guide block 63 is slidably connected inside the short-distance guide rail 62. The sliding guide block 63 is an intermediate component connecting the cylinder and the tension roller, and its exterior is fixedly connected to the drive end of cylinder a61. Under the drive of the cylinder, it can perform reciprocating linear motion along the short-distance guide rail 62. A bearing 64 is rotatably connected inside the sliding guide block 63. The bearing 64 effectively reduces the frictional resistance when the tension roller rotates, ensuring that the tension roller rotates flexibly with the material conveying. Tension rollers a65 are installed inside the two bearings 64. The tension rollers a65 are in direct contact with the heat-sensitive layer material 47. The tension of the material is adjusted by changing its own position. When the cylinder pushes the sliding guide block 63 to move, the tension rollers a65 change the contact angle and pressure with the material, thereby realizing tension adjustment. The tension control mechanism a6 adjusts the tension of the heat-sensitive layer material 47 so that the heat-sensitive layer material 47 always maintains a suitable tension state throughout the entire conveying and coating process.

[0029] like Figures 7-8The two side metal plates 1 shown are equipped with a receiving mechanism 8 at their rear ends on adjacent sides. This mechanism is the core unit at the end of the thermal paper processing flow, integrating multiple functions such as material compaction, correction, curing, and winding, ensuring finished product quality and collection efficiency. The receiving mechanism 8 includes two pressure rollers 81 and three correction rollers b82. Both ends of the two pressure rollers 81 are rotatably connected to the inner side of the side metal plate 1 of the equipment. The pressure rollers 81 are designed with an elastic material surface, and their main function is to perform secondary compaction on the newly laminated thermal paper composite material 83, eliminating air gaps between materials, enhancing the adhesion between the thermal layer material 47 and the film material 48, and improving the composite strength. Both ends of the three correction rollers b82 are rotatably connected to the inner side of the side metal plate 1 of the equipment. The correction rollers b82 continue the position correction function of the correction rollers a46, performing final position calibration on the laminated thermal paper composite material 83 to ensure that it enters the subsequent winding stage with a precise posture, avoiding uneven edges during finished product winding. A take-up bracket 84 is fixedly connected to the rear end of the bottom hollow metal plate 2. The take-up bracket 84 serves as the support frame for the take-up mechanism 8. Its fixed connection with the bottom hollow metal plate 2 achieves rigid integration between the take-up mechanism 8 and the main body of the equipment, providing stable support for heavy components such as the take-up roller 87 and preventing swaying during winding. Two mounting bases b85 are installed in the middle of the take-up bracket 84. High-precision bearings 64 are installed inside the mounting bases b85, providing low-friction support for the rotation of the take-up roller 87, ensuring a smooth and stable winding process and reducing uneven winding tension caused by uneven rotational resistance. The take-up roller 87 is rotatably connected inside the two mounting bases b85. The take-up roller 87 is the core component for finished product winding. Its surface is treated with an anti-slip coating, allowing it to tightly adhere to the thermal paper composite material 83. Continuous rotation enables orderly winding of the finished product, facilitating subsequent storage and transportation. The receiving bracket 84 has two placement racks 86 inside, which are height-adjustable. Their main function is to fix and support the infrared curing device 11. By adjusting the height, the distance between the infrared curing device 11 and the material can be precisely controlled to ensure the curing effect. The infrared curing device 11 is located on the top of the two placement racks 86. The infrared curing device 11 uses the thermal effect of infrared radiation to quickly cure the adhesive in the composite material, accelerate the coagulation process of the adhesive, improve the adhesion between the heat-sensitive layer and the film, and avoid the material deformation problem caused by traditional heating curing. The receiving roller 87 externally winds up the thermal paper composite material 83. The thermal paper composite material 83 is composed of thermal layer material 47 and film material 48. It is the final product of the entire processing flow, and its quality directly determines the performance of the thermal paper. This material is then compacted by the pressure roller 81, corrected in position by the correction roller b82, and passes through the interior of the bottom hollow metal plate 2 before finally being wound onto the receiving roller 87, forming a complete processing loop.

[0030] like Figures 9-10As shown in the material conveying path, in order to achieve the color coating and anti-blocking treatment of thermal paper, a coating mechanism 10 is provided on the top of the bottom hollow metal plate 2. This mechanism is a key unit that gives thermal paper its core performance characteristics. It can accurately complete the pigment coating and anti-blocking agent addition to ensure the quality of the finished product. The coating mechanism 10 includes a pigment tank 101 and an anti-blocking agent storage tank 102. The pigment tank 101 is used to store special pigments required for the color development of thermal paper. Its composition ratio directly affects the color clarity and shelf life of thermal paper. The bottom of the pigment tank 101 is set on top of the bottom hollow metal plate 2. The stable structure of the bottom metal plate provides support for the pigment tank 101 and prevents it from tipping over. The anti-blocking agent storage tank 102 is used to store special agents to prevent the finished thermal paper products from sticking together, avoiding material sticking and damage after winding. The bottom of the anti-blocking agent storage tank 102 is set on top of the bottom hollow metal plate 2 and installed side by side with the pigment tank 101, which facilitates centralized pipeline layout and maintenance. A pump 103 is installed on top of the pigment tank 101. The pump 103 is the power source of the coating mechanism 10. It stably transports the pigment in the pigment tank 101 to the subsequent pipeline through negative pressure suction. Its power can be adjusted to control the feeding speed. The drive end of the pump 103 is fixedly connected to the main pipeline 104. The main pipeline 104 is the main channel for mixing and conveying the pigment and anti-blocking agent. It is made of corrosion-resistant material to adapt to the properties of different agents. A siphon pipeline 105 is installed between the anti-blocking agent storage tank 102 and the main pipeline 104. The siphon pipeline 105 uses the siphon principle to automatically introduce the anti-blocking agent into the main pipeline 104 without additional power, and the flow rate can be adjusted by a valve. Multiple branch pipes 106 are fixedly connected to the opening of the main pipe 104. The branch pipes 106 divert the mixed material to multiple spraying points to ensure uniform material distribution in the coating width direction. Spraying scrapers 107 are fixedly connected to the output ends of the multiple branch pipes 106. Spraying scrapers 107 have the dual functions of spraying and leveling. They spray the material evenly onto the material surface through the nozzle and scrape the coating to the preset thickness through the scraper to ensure coating uniformity. The external part of the spraying scraper 107 is fixedly connected to the top of the bottom hollow metal plate 2. The bottom structure is used to achieve stable installation and avoid coating thickness deviation caused by vibration during the coating process. The material sprayed by the spraying scraper 107 adheres to the thermal paper composite material 83 that passes through the bottom hollow metal plate 2, forming a composite coating with both color-developing function and anti-sticking performance, laying the foundation for subsequent processing and use.

[0031] Working principle: The workflow of this thermal paper uniform coating processing equipment revolves around the lamination, coating, and molding of the thermal layer material 47 and the film material 48. The various mechanisms work together to achieve continuous production. The specific process is as follows: The composite feeding mechanism 4 starts feeding material. The feeding roller a41 rotates under the drive of the external drive device, so that the heat-sensitive layer material 47 wrapped around it is slowly released. The released heat-sensitive layer material 47 is pulled around and passes through multiple upper correction rollers a46 in sequence. The correction rollers a46 perform preliminary calibration of the conveying direction of the heat-sensitive layer material 47 by rotating themselves to prevent the material from deviating. After correction, the heat-sensitive layer material 47 continues to be conveyed to the guide roller a44. The guide roller a44 rotates and changes the conveying angle of the heat-sensitive layer material 47, guiding it to the subsequent processing area. At the same time, the feeding roller b42 rotates synchronously, driving the outer film material 48 to be released. The film material 48 also goes around and passes through multiple lower correction rollers a46 in sequence to complete the orientation calibration. Then, guided by the guide roller b45, it forms a state of vertical correspondence and synchronous conveying with the heat-sensitive layer material 47.

[0032] The glue application mechanism 5 starts synchronously to apply glue to the film material 48. The drive motor 56 on the outside of the mounting plate a51 is powered on and runs. Its drive end drives the rotating shaft 52 to rotate inside the mounting plate a51. The rotation of the rotating shaft 52 directly drives the glue application roller 53 fixedly connected to its outside to rotate. The operator adds glue to the glue storage cavity of the glue application roller 53 through the filling port 54. Under the action of gravity and centrifugal force, the glue flows into the multiple glue outlet grooves 55 opened on the outside of the glue application roller 53. The rotating glue application roller 53 uses the glue outlet grooves 55 to evenly apply the glue to the film material 48 passing over its surface, providing an adhesive basis for subsequent lamination with the heat-sensitive layer material 47.

[0033] To ensure the stability of material conveying, tension control mechanisms a6 and b7 adjust the tension of the two materials respectively. Tension control mechanism a6 operates for the heat-sensitive layer material 47. Cylinder a61 extends and retracts its drive end based on the material tension detection data, causing the sliding guide block 63, fixedly connected to the drive end, to slide inside the short-distance guide rail 62. The sliding of the sliding guide block 63 causes the bearing 64, which is rotatably connected inside, to move synchronously, thereby changing the position of the tension roller a65, which runs through the two bearings 64. The tension roller a65, through its contact with the heat-sensitive layer material 47... Changes in contact pressure allow for precise adjustment of the tension. The tension control mechanism b7 works on the film material 48. The cylinder b72 at the bottom of the mounting plate b71 extends and retracts, pushing the short rod of the T-shaped connecting arm 74 to move, causing the T-shaped connecting arm 74 to rotate around the fixed axis a73. The rotation of the T-shaped connecting arm 74 drives the tension roller b75, which is rotatably connected to its adjacent side, to move up and down. By changing the contact state between the tension roller b75 and the film material 48, the tension of the film material 48 is adaptively adjusted, ensuring that the two materials maintain a consistent conveying tension before lamination.

[0034] Thermosensitive layer material 47, after tension adjustment, and adhesive-coated film material 48 are initially bonded together at the intersection of the conveying paths to form thermosensitive paper composite material 83. Subsequently, the composite material is conveyed to the coating mechanism 10 at the top of the bottom hollow metal plate 2 for coating processing. The pump 103 of the coating mechanism 10 is started to draw thermosensitive paint from inside the pigment box 101. At the same time, the anti-blocking agent in the anti-blocking agent storage tank 102 is introduced into the main pipe 104 through the siphon pipe 105. After the paint and anti-blocking agent are initially mixed in the main pipe 104, they are evenly distributed to the spray scraper 107 through multiple branch pipes 106. The spray scraper 107 evenly sprays out the mixture and coats it on the surface of the thermosensitive paper composite material 83 passing below, forming the required thermosensitive coating.

[0035] After coating, the thermal paper composite material 83 continues to be conveyed to the working area of ​​the cooling mechanism 9. The cylinder c91 of the cooling mechanism 9 extends and retracts its drive end, pushing the rotating arm 93 to rotate around the fixed shaft b92. The rotation of the rotating arm 93 drives the rotating small arm 94 connected to its top to move synchronously, so that the fixed cooling pipe 95 fixedly connected to the side of the rotating small arm 94 and the sliding connecting pipe 97 are close to the surface of the thermal paper composite material 83. The operator can adjust the position of the moving connecting pipe 97 through the adjusting bolt 96 on one side of the rotating small arm 94 to ensure the fit between the cooling pipe and the material surface. The coating layer is quickly cooled and shaped by introducing a cooling medium.

[0036] After cooling, the thermal paper composite material 83 continues to be conveyed to the take-up mechanism 8 area. First, it passes between two pressure rollers 81. The pressure rollers 81 rotate under the drive of the drive device, applying a certain pressure to the composite material, further improving the adhesion between the thermal layer and the film layer. Then, the material passes through three correction rollers b82 in sequence. The correction rollers b82 perform final calibration of the material's conveying direction through their own rotation and position fine adjustment, preventing the material from deviating before winding. At the same time, the infrared curing device 11 on the top rack 86 of the take-up bracket 84 is activated, irradiating the thermal paper composite material 83 passing below with infrared light. The heat energy promotes the complete curing of the coating layer, improving the adhesion and thermal performance of the coating.

[0037] After curing and calibration, the thermal paper composite material 83 is finally guided to the take-up roller 87. The take-up roller 87 rotates under the support of the mounting base b85, and the processed thermal paper composite material 83 is evenly wrapped around its outside, completing the entire thermal paper composite coating process. During this process, the ventilation holes 3 evenly distributed on the metal plate 1 on the side of the equipment continuously realize the air circulation between the inside of the equipment and the outside, providing a suitable working environment for the stable operation of each mechanism.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A thermal paper uniform coating processing device, comprising two sets of side metal plates (1), characterized in that: Two side metal plates (1) of the equipment are fixedly connected to the bottom by welding with a bottom hollow metal plate (2). Multiple ventilation holes (3) are opened on the side metal plates (1) of the equipment, and the ventilation holes (3) are evenly distributed on the side metal plates (1). A composite feeding mechanism (4) is provided at the front end of the two side metal plates (1) of the equipment, a glue brushing mechanism (5) is provided at the front end of the two side metal plates (1), a tension control mechanism a (6) is provided at the front end of the two side metal plates (1), a tension control mechanism b (7) is provided at the front end of the two side metal plates (1), a material receiving mechanism (8) is provided at the rear end of the two side metal plates (1), a cooling mechanism (9) is provided at the rear end of the two side metal plates (1), and a coating mechanism (10) is provided at the top of the bottom hollow metal plate (2).

2. The thermal paper uniform coating processing equipment according to claim 1, characterized in that: The composite feeding mechanism (4) includes a feeding roller a (41) and a feeding roller b (42). The two ends of the feeding roller a (41) are rotatably connected to the adjacent sides of the two side metal plates (1) of the equipment. The two ends of the feeding roller b (42) are rotatably connected to mounting bases a (43). The two mounting bases a (43) are fixedly connected to the adjacent sides of the side metal plates (1) of the equipment. The adjacent sides of the two side metal plates (1) of the equipment are rotatably connected to guide rollers a (44). The adjacent sides of the two side metal plates (1) of the equipment are the guide rollers. A guide roller b (45) is rotatably connected below roller a (44). Multiple correction rollers a (46) are rotatably connected to the adjacent side of the two side metal plates (1) of the equipment. A thermal layer material (47) is provided on the outside of the feeding roller a (41). The thermal layer material (47) surrounds and passes through the multiple correction rollers a (46) and the guide roller a (44) above in sequence. A film material (48) is provided on the outside of the feeding roller b (42). The film material (48) surrounds and passes through the multiple correction rollers a (46) and the guide roller b (45) below in sequence.

3. The thermal paper uniform coating processing equipment according to claim 1, characterized in that: The glue application mechanism (5) includes a mounting plate a (51), which is fixedly connected to the inside of one of the metal plates (1) on the side of the equipment. A rotating shaft (52) is rotatably connected inside the mounting plate a (51), and a glue application roller (53) is fixedly connected to the outside of the rotating shaft (52). A filling port (54) is provided on one side of the glue application roller (53), and multiple glue outlet grooves (55) are opened on the outside of the glue application roller (53). A drive motor (56) is installed on the outside of the mounting plate a (51), and the drive end of the drive motor (56) is fixedly connected to one side of the rotating shaft (52) to drive the rotating shaft (52) to rotate.

4. The thermal paper uniform coating processing equipment according to claim 2, characterized in that: The tension control mechanism a (6) includes two cylinders a (61) and two short-pitch guide rails (62). The cylinders a (61) are externally mounted on the inner wall of the metal plate (1) on the side of the equipment. The short-pitch guide rails (62) are externally mounted on the inner wall of the metal plate (1) on the side of the equipment. A sliding guide block (63) is slidably connected inside the short-pitch guide rail (62). The sliding guide block (63) is externally fixedly connected to the drive end of the cylinders a (61). A bearing (64) is rotatably connected inside the sliding guide block (63). Tension rollers a (65) are provided inside the two bearings (64). The tension control mechanism a (6) adjusts the tension of the heat-sensitive layer material (47).

5. The thermal paper uniform coating processing equipment according to claim 1, characterized in that: The tension control mechanism b (7) includes two mounting plates b (71) and two fixed shafts a (73). The mounting plates b (71) are fixedly connected to the outer wall of the metal plate (1) on the side of the equipment. A cylinder b (72) is fixedly connected to the bottom of the mounting plates b (71). The two fixed shafts a (73) are mounted on the inner side of the metal plate (1) on the side of the equipment. A T-shaped connecting arm (74) is rotatably connected to the outside of the fixed shafts a (73). The short rod part of the T-shaped connecting arm (74) is connected to the driving end of the cylinder b (72) and is rotatably connected. A tension roller b (75) is rotatably connected to the adjacent side of the two T-shaped connecting arms (74).

6. The thermal paper uniform coating processing equipment according to claim 1, characterized in that: The receiving mechanism (8) includes two pressing rollers (81) and three straightening rollers b (82). The two ends of the two pressing rollers (81) are rotatably connected to the inner side of the metal plate (1) on the side of the equipment. The two ends of the three straightening rollers b (82) are rotatably connected to the inner side of the metal plate (1) on the side of the equipment. The rear end of the bottom hollow metal plate (2) is fixedly connected to a receiving bracket (84). Two mounting bases b (85) are installed in the middle of the receiving bracket (84). The receiving rollers (87) are rotatably connected inside the two mounting bases b (85). Two placement racks (86) are provided inside the receiving bracket (84). An infrared curing device (11) is provided on the top of the two placement racks (86).

7. The thermal paper uniform coating processing equipment according to claim 6, characterized in that: The take-up roller (87) has thermal paper composite material (83) wound around its exterior. The thermal paper composite material (83) is composed of thermal layer material (47) and film material (48), and passes through the pressing roller (81), the correction roller b (82), and the interior of the bottom hollow metal plate (2) in sequence, and is finally wound onto the take-up roller (87).

8. The thermal paper uniform coating processing equipment according to claim 1, characterized in that: The cooling mechanism (9) includes two cylinders c (91) and two fixed shafts b (92). The cylinders c (91) are fixedly connected to the inside of the metal plate (1) on the side of the equipment. The fixed shafts b (92) are rotatably connected to the inside of the metal plate (1) on the side of the equipment. A rotating arm (93) is fixedly connected to the outside of the fixed shafts b (92). The bottom of the rotating arm (93) is rotatably connected to the drive end of the cylinders c (91). A rotating arm (94) is rotatably connected to the top of the rotating arm (93).

9. The thermal paper uniform coating processing equipment according to claim 8, characterized in that: A fixed cooling pipe (95) is fixedly connected to one side of the two rotating arms (94), an adjusting bolt (96) is provided on one side of the rotating arms (94), and a movable connecting pipe (97) is slidably connected to one side of the two rotating arms (94).

10. The thermal paper uniform coating processing equipment according to claim 6, characterized in that: The coating mechanism (10) includes a pigment tank (101) and an anti-blocking agent storage tank (102). The bottom of the pigment tank (101) is located on the top of the bottom hollow metal plate (2), and the bottom of the anti-blocking agent storage tank (102) is located on the top of the bottom hollow metal plate (2). A pumping pump (103) is installed on the top of the pigment tank (101), and the drive end of the pumping pump (103) is fixedly connected to a main pipe (104). The anti-blocking agent storage tank (102) and the... A siphon pipe (105) is provided between the main pipes (104). Multiple branch pipes (106) are fixedly connected to the opening of the main pipes (104). A spray scraper (107) is fixedly connected to the output end of the multiple branch pipes (106). The outside of the spray scraper (107) is fixedly connected to the top of the bottom hollow metal plate (2). The material sprayed by the spray scraper (107) adheres to the thermal paper composite material (83) that passes through the bottom hollow metal plate (2).

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