A multifunctional coating machine

Abstract

A multi-functional coating machine, through equipment units such as an unwinding device, a rewinding device, a conveying device, a coating device, a heat drying device, an embossing device, a UV curing device, and a cooling device set on the first, second, third, fourth, and horizontal frames, can coordinate and adjust different unwinding routes to achieve eight functions: coating, dry lamination, online peel coating, post-coating UV curing, post-coating embossing UV curing, thermal bonding transfer, post-unwinding rewinding, and online peel coating followed by lamination. Each functional process can operate stably. When different unwinding routes are required, only simple adjustments to the equipment are needed, effectively enhancing the equipment's flexibility in handling multiple processes and simplifying equipment management and the operation difficulty for technical personnel.

Description

TECHNICAL FIELD

[0001] The present application relates to coating equipment, in particular to a multifunctional coating machine. BACKGROUND

[0002] The coating machine is a kind of equipment for coating the surface of flexible thin-layer planar substrate such as film, paper and aluminum foil, which can coat a layer of functional coating with special functions on the surface of flexible thin-layer planar material, and cooperate with auxiliary equipment to complete processes such as embossing, compounding, UV curing, etc. to produce corresponding coated materials. With the unique customization needs of consumers for products, manufacturers need to meet the needs of different types of small-batch products in the market, and multifunctional and high-flexibility coating equipment can meet the application of different types of coating processes, and the market demand for such equipment is increasing.

[0003] At present, most of the research on anilox roll coating machines still adopts a single customized form, and a single device is often suitable for a single coating process to produce a single product, that is, the customized coating equipment can only complete the corresponding process, such as coating equipment, embossing equipment, UV curing equipment, compounding equipment, etc., and the function is relatively single. When products need to be completed by multiple asynchronous processes such as coating and embossing, hot transfer after curing, and hot compounding after coating, different equipment sets are usually used to complete the processes.

[0004] When two different types of equipment are needed to process the substrate in the adjacent process, the intermediate product of the processed substrate needs to be switched to other equipment, which cannot be produced continuously online, and usually needs to be placed in a specific warehouse with stable temperature and humidity to reduce the unstable properties of different batches of intermediate products of the substrate, and to avoid the connection of adjacent processes due to the performance difference of the intermediate product of the substrate. However, this will cause a decrease in production efficiency, and the equipment and intermediate product of the substrate will occupy the space of the factory area; in order to improve the matching degree of the adjacent processes of different equipment, operators with rich experience in equipment operation are needed to perform technical debugging according to the characteristics of the equipment, and the process relies heavily on personnel experience; in addition, the debugging between different equipment in the adjacent process, or the re-production after the interruption of production, will consume a certain amount of materials, which is easy to cause material waste. SUMMARY

[0005] The purpose of the present application is to provide a multifunctional coating machine which can realize eight functions of coating, dry compounding, online stripping coating, UV curing after coating, embossing UV curing after coating, hot lamination transfer, rewinding after unwinding, and compounding after online stripping coating by adjusting different unwinding lines, and each function process can be stably operated.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical means for implementation:

[0007] A multi-functional coating machine includes a control system and a frame. The first frame is provided with a first tension adjusting mechanism that connects and adjusts the substrate tension between a first unwinding device and a first winding device. A first clamping roller group is provided at the rear end of the stroke of the first tension adjusting mechanism. The first tension adjusting mechanism comprises at least one transfer roller and at least one EP valve-adjustable cylinder adjusting roller disposed between the first unwinding roller and the first clamping roller group, and at least one transfer roller and at least one EP valve-adjustable cylinder adjusting roller disposed between the first winding roller and the first clamping roller group.

[0008] The second frame is equipped with a second tension adjustment mechanism that connects and adjusts the substrate tension between the second unwinding device and the second winding device. A second pressure roller group is provided at the front end of the stroke of the second tension adjustment mechanism. The second tension adjustment mechanism consists of at least one transmission roller, at least one tension fine-tuning transmission roller mechanism, and at least one EP valve-adjustable cylinder adjustment roller disposed between the second unwinding roller and the second pressure roller group.

[0009] The third frame is equipped with a third tension adjustment mechanism that connects and adjusts the substrate tension between the third winding device and the cooling traction device. A third pressure roller group is provided at the front end of the stroke of the third tension adjustment mechanism. The third tension adjustment mechanism consists of at least one transmission roller and at least one EP valve-regulated cylinder adjustment roller located between the third winding roller and the cooling traction device.

[0010] The fourth frame is equipped with a coating device. The substrate tension is adjusted by a coating tension regulating device. The coating device controls the amount of coating material applied by the anilox roller through a sealed cavity scraper. A pressing cylinder drives a pressing roller to press the substrate, transferring the coating material on the anilox roller to the substrate surface. A leveling roller is driven by an explosion-proof motor to rotate in the opposite direction to the substrate transport direction. The coating tension regulating device consists of at least one transfer roller, at least one tension fine-tuning transfer roller mechanism, and at least one EP valve regulating cylinder regulating roller, all located between the inlet end and the anilox roller.

[0011] The horizontal frame is set above the first, second, third and fourth frames. The hot air drying duct of the hot drying device is set on the horizontal frame. Several oven guide rollers are arranged along the horizontal frame from the front end to the rear end and form an arc-shaped tension surface with each other.

[0012] The UV curing device and the embossing device are located between the transmission strokes of the hot drying device and the cooling traction device. Both the embossing device and the UV curing device are equipped with guide transmission rollers.

[0013] The EP valve-adjustable cylinder adjusting roller includes an EP valve, an EP valve-adjustable cylinder, an adjusting roller, and an adjusting roller drive motor. The control system adjusts the threshold signal range corresponding to the tension threshold range through the EP valve. The potentiometer detects the position of the adjusting roller and outputs a data signal to the control system, which is compared with the threshold signal range. The control system controls the EP valve-adjustable cylinder to adjust the position of the adjusting roller and controls the adjusting roller drive motor to adjust the speed and torque of the adjusting roller, so that the data signal does not exceed the threshold signal range.

[0014] When the substrate is transmitted through the first, second, third, and fourth tension adjustment mechanisms, the roll wrap angle of the substrate on the EP valve-adjustable cylinder adjusting roller is not less than 90°.

[0015] Furthermore, the first clamping roller group consists of a swing roller and a paired driven roller that are mutually clamped by a first driving cylinder.

[0016] Furthermore, the second clamping roller group consists of a water-cooled back pressure roller and a paired hot pressure roller that are mutually clamped by a second drive cylinder.

[0017] Furthermore, the third clamping roller group consists of a swing roller and a paired driven roller that are mutually clamped by a third driving cylinder; the cooling traction device consists of two water-cooled front and rear cooling rollers arranged along the front and rear of the transmission stroke; the third clamping roller group consists of a swing roller and a paired front cooling roller that are mutually clamped by a third driving cylinder.

[0018] Furthermore, the sealing cavity scraper is provided with a paint tank, a scraper cavity, and a diaphragm pump. The scraper part consists of an upper scraper and a lower scraper. The scraper cavity is arranged between the upper and lower scrapers. The lower scraper is provided with an overflow slope that leads to the scraper cavity. The scraper cavity and the paint tank are in fluid communication. The diaphragm pump pumps the coating material in the paint tank and / or the scraper cavity to the outside of the paint tank.

[0019] Furthermore, the scraper section also includes an upper sealing plate and a lower sealing plate; the upper and lower scrapers are equidistant from and separated from the anilox roller, and the upper and lower sealing plates correspondingly clamp the upper and lower scrapers and are recessed within the cutting surfaces of the upper and lower scrapers; an upper acute angle is formed between the upper scraper and the cutting plane of the anilox roller, and a lower acute angle is formed between the lower scraper and the cutting plane of the anilox roller. Preferably, the angle between the upper and lower acute angles is 30°~35°.

[0020] Furthermore, the coating tension adjustment device also includes a common rotating arm double transfer roller mechanism. The angled rotating arm of the common rotating arm double transfer roller mechanism is hinged to the fourth frame. The pressing roller and a transfer roller are respectively arranged at the two swing ends of the angled rotating arm. The first swing end is a free swing end, and the second swing end is driven by the pressing cylinder to make the angled rotating arm swing along the hinge axis and adjust the distance between the pressing roller and the anilox roller.

[0021] Furthermore, the hot air drying tunnel is equipped with a tunnel body, a fan, a temperature control system, finned heating elements, hot air nozzles, return air vents, and an exhaust duct. The hot air nozzles are evenly arrayed along the tunnel body and point towards the substrate coating surface. The fan transmits hot air flow heated by the finned heating elements to the hot air nozzles. The return air vents in the tunnel body are connected to the exhaust duct. The temperature control system monitors and adjusts the temperature of the finned heating elements, the flow rate of the hot air nozzles, and the exhaust speed of the return air vents. The inlet and / or outlet of the hot air drying tunnel are equipped with substrate correction devices.

[0022] Furthermore, the tension fine-tuning transmission roller mechanism includes a tension fine-tuning transmission roller shafted to the tension fine-tuning transmission roller seat, and a mechanical knob that drives the tension fine-tuning transmission roller seat to reciprocate along the frame.

[0023] Furthermore, along the substrate travel direction, the embossing device and the UV curing device are arranged sequentially before and after each other. The embossing roller group of the embossing device is a clutch-type embossing roller group, and the UV curing device is a UV LED dot matrix light source curing device that does not contact the substrate.

[0024] The present invention has at least the following advantages:

[0025] This equipment, through the rational configuration of the installation methods of each device, can realize the functional requirements of eight processes in one production line: coating, dry lamination, online peel coating, post-coating UV curing, post-coating embossing UV curing, thermal bonding transfer, unwinding and rewinding, and online peel coating and lamination. For different target processes, different process routes can be selected by adjusting different unwinding routes. Moreover, when different unwinding routes are required, only simple adjustments are needed to the supply of coating material to the doctor blade in the sealing cavity, the gap between the rollers of the clamping roller group, the embossing roller of the embossing device, and the opening and closing of the UV curing device. This effectively enhances the flexibility of the equipment in handling multiple processes, simplifies equipment management and the operation difficulty of technical personnel, reduces the manufacturer's repeated investment, and maximizes the production capacity of the equipment.

[0026] 2. An EP valve-controlled adjustable cylinder roller is used as a tension adjustment component during substrate transport. The control system adjusts the threshold signal range corresponding to the tension threshold range through the EP valve. A potentiometer detects the position of the adjustable roller and outputs a data signal to the control system, which is compared with the threshold signal range. The control system controls the EP valve-controlled adjustable cylinder, causing the EP valve-controlled adjustable cylinder push rod to move the adjustable roller seat. This allows the adjustable roller to adjust its position according to the signal, and coordinates with the control motor to adjust the speed and torque of the adjustable roller. This effectively adjusts and controls the tension of the substrate during transport, making it more suitable for long-distance transport while maintaining the substrate under the set tension. Furthermore, by setting the EP valve-controlled adjustable cylinder roller's wrap angle to be no less than 90°, slippage of the substrate on the adjustable roller can be effectively prevented. In this embodiment, the preferred method is to set the wrap angle of each EP valve-controlled adjustable cylinder roller to be a reverse 180° wrap angle enveloping the adjustable roller. This also allows the adjustable roller to adjust the substrate at equal intervals before and after it during adjustment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first rack and its equipment units;

[0028] Figure 2 This is a schematic diagram of the second rack and its equipment units;

[0029] Figure 3 This is a schematic diagram of the third rack and its equipment units;

[0030] Figure 4 This is a schematic diagram of the fourth rack and its equipment units;

[0031] Figure 5 This is a schematic diagram of the horizontal frame and its equipment units;

[0032] Figure 6 This is a schematic diagram of the scraper for the sealing cavity;

[0033] Figure 7 This is a schematic diagram of an EP valve regulating cylinder;

[0034] Figure 8 This is a schematic diagram illustrating the unwinding process of the coating function of this invention;

[0035] Figure 9 This is a schematic diagram illustrating the unwinding process for achieving the dry composite function of this invention;

[0036] Figure 10 This is a schematic diagram illustrating the unwinding process of the present invention to achieve the online peeling and coating function;

[0037] Figure 11 This is a schematic diagram illustrating the unwinding process of the present invention to achieve the UV curing function after coating;

[0038] Figure 12 This is a schematic diagram illustrating the unwinding process of the present invention to achieve the embossing and UV curing function after coating;

[0039] Figure 13 This is a schematic diagram illustrating the unwinding process for the thermal bonding and transfer function of this invention.

[0040] Figure 14 This is a schematic diagram illustrating the unwinding and rewinding function of the present invention.

[0041] Figure 15 This is a schematic diagram illustrating the unwinding process of the present invention to achieve the online peel-off coating and lamination function. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0043] like Figures 1-15 As shown, a multi-functional coating machine has a first frame 10, a second frame 20, a third frame 30, and a fourth frame 40 arranged at the bottom and supporting a horizontal frame 50 above. Its control system controls the various devices installed on the frames. Specifically:

[0044] The first frame 10 is provided with a first unwinding device 110, a first winding device 120, and a first tension adjustment mechanism. The first tension adjustment mechanism is connected to and adjusts the substrate tension between the first unwinding device 110 and the first winding device 120.

[0045] The first clamping roller group 130 consists of a swing roller 133 and a paired driven roller 132 that are mutually clamped by a first driving cylinder 131. The first unwinding roller mechanism of the first unwinding device 110 is guided by a transmission roller to transfer the substrate to the EP valve adjustable cylinder adjusting roller 111. The substrate then wraps around the EP valve adjustable cylinder adjusting roller 111 with a 180° reverse roll wrap angle. After passing through the transmission roller to change the tension, the substrate is transferred to the first clamping roller group 130 to form the first unwinding line. The substrate is guided from the first clamping roller group 130 to the EP valve adjustable cylinder adjusting roller 122 via the transmission roller. The substrate then wraps around the EP valve adjustable cylinder adjusting roller 122 with a 180° reverse roll wrap angle. After passing through the large wrap angle of the two transmission rollers to change the transmission direction, the substrate can be wound by the first winding roller mechanism 121.

[0046] The second frame 20 is provided with a second unwinding device 210, a second winding device 220, and a second tension adjustment mechanism. The second tension adjustment mechanism is connected to and adjusts the substrate tension between the second unwinding device 210 and the second winding device 220.

[0047] The second clamping roller group 230 preferably employs a hot pressure roller 232 driven by a second drive cylinder 231 to swing and a paired water-cooled back pressure roller 232 that clamps each other. The second unwinding roller mechanism of the second unwinding device 210 is guided by four transmission rollers to tension four times, and then the substrate is transferred to the EP valve adjustable cylinder adjusting roller 211. The substrate is then wrapped with the EP valve adjustable cylinder adjusting roller 211 with a 180° reverse roll wrap angle. After that, it is transferred to the second clamping roller group 230 through two transmission rollers to tension twice, forming the second unwinding line. The substrate is transferred from the second clamping roller group 230 to the EP valve adjustable cylinder adjusting roller 212 through four transmission rollers to tension four times. The substrate is then wrapped with the EP valve adjustable cylinder adjusting roller 212 with a 180° reverse roll wrap angle. After that, it is transferred to the second take-up roller mechanism through the tension guidance of one transmission roller and the tension adjustment of a tension fine-tuning transmission roller mechanism 240, forming the second take-up roller mechanism, so that the substrate can be taken up by the second take-up roller mechanism.

[0048] The third frame 30 is equipped with a cooling traction device 310, a third winding device 320, and a third tension adjustment mechanism. The third tension adjustment mechanism is connected to and adjusts the substrate tension between the cooling traction device 310 and the third winding device 320.

[0049] The third clamping roller group 330 consists of a swing roller 333 and a paired driven roller that are mutually clamped by a third drive cylinder 331. The cooling traction device 310 consists of two water-cooled front cooling rollers 311 and rear cooling rollers 312 arranged along the front and rear of the transmission stroke. In this embodiment, the front cooling roller 311 is set as the driven roller of the third clamping roller group 330. After the substrate is cooled and tensioned by the front cooling rollers 311 and rear cooling rollers 312 from the third clamping roller group 330, it is then tensioned and guided by a transmission roller to the EP valve adjustable cylinder adjusting roller 341. Then, the EP valve adjustable cylinder adjusting roller 341 is wrapped with a 180° reverse roll wrap angle. After two tensioning and guiding transmissions by two transmission rollers, the substrate can be wound by the third winding roller mechanism to form the third winding line.

[0050] The fourth frame 40 is equipped with a coating device. The substrate tension is adjusted by a coating tension regulating device. The coating device controls the amount of coating material applied by the anilox roller 421 through a sealed cavity scraper 41. The pressing cylinder 422 drives the pressing roller 423 to press the substrate, so that the coating material on the anilox roller 421 is transferred to the substrate surface. The glue-spreading roller 424 is driven by an explosion-proof motor to rotate in the opposite direction to the substrate transmission direction. The glue-spreading roller 424 rotates in the opposite direction to the glue-coated surface of the substrate, which effectively smooths and spreads the coating material on the coating surface, thereby improving the effect of substrate lamination and thermal bonding processes.

[0051] By using an explosion-proof motor as the device to drive the 424 coating roller to smooth and evenly spread the coating material, the device can effectively smooth and evenly spread the high-viscosity coating material on the substrate surface by taking advantage of its high torque and explosion-proof performance and the ability to achieve long cycle operation.

[0052] In this embodiment, the substrate is tensioned and guided twice by two transfer rollers of the coating tension adjustment device from the entry end. Then, it wraps around the EP valve-adjustable cylinder adjusting roller 431 with a 180° reverse roll wrap angle. After passing through another transfer roller for tension guidance and a tension adjustment transfer by a tension fine-tuning transfer roller mechanism, the substrate is tensioned and adjusted by the common rotating arm double transfer roller mechanism 440 and then coated. Specifically, the angled rotating arm 441 of the common rotating arm double transfer roller mechanism 440 is hinged to the fourth frame 40, and the pressing roller 42... 3. The transfer rollers are respectively set at the two swing ends of the angled rotating arm 441. The first swing end 442 is a free swing end, and the second swing end 443 is driven by the pressing cylinder 422 to make the angled rotating arm 441 swing along the hinge axis 444 and adjust the distance between the pressing roller 423 and the anilox roller 421. The substrate is coated on the pressing surface of the pressing roller 423 and the anilox roller 421. Then the coated substrate is tensioned and guided twice by the two transfer rollers to send the substrate to the output end, forming a coating line.

[0053] With the shared-arm double-transfer roller mechanism 440, during the quantitative coating process of the substrate on the pressing surfaces of the pressing roller 423 and the anilox roller 421, the coating material accumulates in the gap between the pressing roller 423 and the pressing roller 423. The shared-arm double-transfer roller mechanism 440 adjusts the position of the pressing roller 423. At this time, the substrate is driven by the transfer roller of the first swing end 442 and is subjected to a small-amplitude pulling force. The tension change causes the EP valve adjustable cylinder adjusting roller 431 of the fourth frame 40 to adjust its displacement. When the adjustment range is too large, the control system detects that the adjustment range of the EP valve adjustable cylinder adjusting roller 431 of the fourth frame 40 exceeds the preset threshold. The entire equipment can be stopped to avoid the subsequent processes from being affected by errors in the coating process.

[0054] A horizontal frame 50 is positioned above the first, second, third, and fourth frames (10, 20, 30, 40). A hot air drying duct 53 of the hot air drying device is positioned on the horizontal frame 50. Several oven guide rollers 51 are arranged along the horizontal frame 50 from front to rear and form an arc-shaped tension surface. In this embodiment, the inlet and outlet of the hot air drying duct 53 are respectively equipped with a front substrate correction device 52, a first rear substrate correction device 531, and a second rear substrate correction device 532. The hot air drying duct 53 includes a drying duct body, a fan, and a temperature control system. The oven includes finned heating elements, hot air nozzles, return air holes, and exhaust pipes. The hot air nozzles are evenly arrayed along the oven tunnel body and point towards the substrate coating surface. The fan transmits hot air flow heated by the finned heating elements to the hot air nozzles. The return air holes in the oven tunnel body are connected to the exhaust pipes. The temperature control system monitors and adjusts the temperature of the finned heating elements, the flow rate of the hot air nozzles, and the exhaust speed of the return air holes. The substrate is tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, the first rear substrate correction device 531, or the second rear substrate correction device 532. During the transmission process, the hot air flow blown out by the hot air nozzle can be directed at the surface of the substrate at a wind speed of 15-25 m / s, rapidly heating the coating on the substrate surface, thereby vaporizing the solvent in the coating material. The evaporated solvent enters the exhaust pipe through the return air holes on both sides of the hot air nozzle with the air flow. During the tensioning and transmission of the substrate by the arc-shaped oven guide rollers 51, the substrate may undergo certain deformation due to the thermal environment. The substrate can be adjusted by the front substrate correction device 52 and the first rear substrate correction device 531, or the front substrate correction device 52 and the second rear substrate correction device 532, to ensure the normal transmission of the substrate. More preferably, the oven guide rollers 51 are driven by a variable frequency motor, a reducer, and a synchronous belt to roll synchronously, which can further improve the synchronicity of the substrate transmission.

[0055] An embossing device 60 and a UV curing device 70 are also provided on the horizontal frame 50. Specifically, the UV curing device 70 and the embossing device 60 are arranged sequentially and positioned between the transmission strokes of the heating device and the cooling traction device 310. Along the transmission direction of the substrate, the front and rear ends of the embossing device 60 are provided with a pre-embossing guide roller 62 and a post-embossing guide roller 63, and the front and rear ends of the UV curing device 70 are provided with a pre-UV curing guide roller 72 and a post-UV curing guide roller 73. More preferably, in this embodiment, the embossing device 60 adopts a clutch-type embossing roller group composed of an upper embossing roller 61 and a lower embossing roller 64, and the UV curing device 70 adopts a substrate-non-contact UV LED dot matrix light source curing device. With this arrangement, the substrate can independently select whether to perform embossing and UV curing processes, reducing the contact between the substrate coating surface and some components of the embossing device 60 and the UV curing device 70, thus reducing the impact on the coating surface.

[0056] The EP valve regulating cylinder regulating rollers in the above-mentioned devices all adopt the same configuration scheme. Specifically, the EP valve regulating cylinder regulating roller includes an EP valve f1, an EP valve regulating cylinder f2, a regulating roller f3, a regulating roller seat f4, and a regulating roller drive motor.

[0057] The scheme of setting the roll wrap angle of not less than 90° can effectively prevent the substrate on the adjusting roller f3 from slipping. In this embodiment, it is preferred to set the roll wrap angle of each EP valve adjusting cylinder adjusting roller to be a 180° reverse roll wrap angle to wrap around the adjusting roller f3. When the EP valve adjusting cylinder adjusting roller is adjusted, the adjusting roller f3 drives the substrate in front and behind it to be adjusted at equal intervals. The control system adjusts the threshold signal range corresponding to the tension threshold range through the EP valve f1. The potentiometer detects the position of the adjusting roller f3 and outputs a data signal to the control system and compares it with the threshold signal range. The control system controls the EP valve adjusting cylinder f2, so that the EP valve adjusting cylinder push rod f5 drives the adjusting roller seat f4 to move. This allows the adjusting roller f3 to adjust its position according to the signal. The control system also controls the adjusting roller drive motor to adjust the speed and torque of the adjusting roller f3 so that the data signal does not exceed the preset threshold signal range. When the data signal exceeds the preset threshold signal range, the control system can stop the operation by controlling the equipment to avoid the subsequent process being affected by the tension error of the substrate. This is more suitable for the substrate to be transported over long distances while maintaining the set tension.

[0058] As a preferred embodiment, in this embodiment, the first, second, and third take-up roller mechanisms and the first and second unwind roller mechanisms all use a variable frequency motor-reducer-air expansion shaft as the roller shaft drive power mechanism. With this setting, the control system can control the speed and torque of the motor and control the roller shaft to complete stable take-up and unwind. More preferably, by adding a kissing roller mechanism to the first, second, and third take-up roller mechanisms, it can effectively fit the substrate roll and avoid the film wrapping angle being affected by the change in roll diameter when taking up the substrate.

[0059] Fine-tuning the substrate tension via the tension fine-tuning transfer roller mechanism helps eliminate accumulated errors that may occur after prolonged equipment operation when adjusting the substrate tension using the EP valve-controlled cylinder adjusting roller. Furthermore, the effects of these accumulated errors may be amplified by the influence of thermal environments and moisture on the substrate. In this embodiment, by adding a tension fine-tuning transfer roller mechanism to the second tension adjustment mechanism and the coating tension adjustment device, the fine-tuning of the substrate tension achieves the following effects:

[0060] During the hot-air dried substrate and the unwound substrate of the second unwinding mechanism to complete the thermal lamination or thermal transfer process in the second pressure roller group 230, the tension of the unwound substrate of the second unwinding mechanism may change due to the influence of the thermal environment from room temperature. The tension adjustment frequency of the EP valve regulating cylinder adjusting rollers (211, 212) of the second frame 20 is relatively more frequent. Through the tension fine-tuning transmission roller mechanism 240 of the second frame 20, the tension amplitude between the tension fine-tuning transmission roller and the substrate can be finely adjusted, thereby reducing the impact of accumulated errors and improving the alignment accuracy of the hot-air dried substrate and the unwound substrate of the second unwinding device 210 and the stability of equipment operation during the lamination and thermal bonding transfer process.

[0061] During the quantitative coating process, the pressing cylinder 422 drives the pressing roller 423 to press the substrate, so that the coating material on the anilox roller 421 is transferred to the surface of the substrate. In order to maintain the accuracy of the quantitative coating process, a stable distance needs to be maintained between the substrate and the anilox roller 421, and the substrate can fully transfer the coating material from the anilox roller 421. The tension is adjusted by using an EP valve adjustable cylinder roller. The coating material accumulates in the gap between the anilox roller 421 and the pressing roller 423 pressing the substrate. The pressing roller 423 is adjusted by the common rotating arm double transfer roller mechanism 440. At the same time, the tension of the substrate is adjusted by the EP valve adjustable cylinder roller 431 and the common rotating arm double transfer roller mechanism 440. During long-term operation, due to the dual movement adjustment of the front and rear ends of the substrate transfer stroke by the EP valve adjustable cylinder roller 431 and the common rotating arm double transfer roller mechanism 440, the tension of the substrate can be adjusted and balanced by the tension fine-tuning transfer roller mechanism 450 installed on the fourth frame 40.

[0062] As an effective structure, the tension fine-tuning transmission roller mechanism 450 on the fourth frame can be composed of a tension fine-tuning transmission roller 452 axially connected to the tension fine-tuning transmission roller seat 451, and a mechanical knob 453 that drives the tension fine-tuning transmission roller seat 451 to reciprocate along the frame. With this configuration, the operator can easily adjust the position of the tension fine-tuning transmission roller 452 by rotating the mechanical knob 453, thereby changing the tension of the substrate. Correspondingly, by monitoring the potentiometer output data of the EP valve-adjustable cylinder adjusting roller through the control system, the tension change of the substrate can be measured, thus helping the operator conveniently complete the substrate tension fine-tuning operation.

[0063] To improve the stability of coating material output and recycling during the quantitative coating process of the coating device, as a further preferred solution, in this embodiment, the sealing cavity scraper 41 is provided with a coating tank 418, a scraper chamber 411, and a diaphragm pump. The scraper part is disposed on the coating tank 418, and the scraper chamber 411 is disposed between the upper scraper 413 and the lower scraper 415. The lower scraper 415 is provided with an overflow slope 416. The diaphragm pump pumps the coating material in the coating tank 418 to the outside of the coating tank 418. With this arrangement, after the coating material flows to the sealing cavity scraper 41, the coating material filled in the mesh of the anilox roller 421 is scraped flat by the lower scraper 415 and the upper scraper 413 in sequence. The excess coating material scraped off flows along the overflow slope 416 into the scraper chamber 411. The scraper chamber 411 can be fluidly connected to the coating tank 418 by means such as pipes, channels, or direct overflow. Preferably, when the coating material selected for the coating process has strong fluidity, excess coating material can be pumped from the coating tank 418 to an external feed tank, allowing the anilox roller 421 to recycle this portion of coating material and preventing excessive coating material from accumulating in the coating tank 418. Alternatively, a diaphragm pump can be connected to the doctor blade chamber 411, allowing the diaphragm pump to directly and promptly remove excess coating material from the doctor blade chamber 411, thereby reducing excessive accumulation of excess coating material in the doctor blade chamber 411 caused by the high-speed rotation of the anilox roller 421 during high-speed coating.

[0064] The scraper section of the sealing cavity scraper 41 is a detachable upper sealing plate 412, lower sealing plate 414, upper scraper 413, and lower scraper 415. The upper scraper 413 and lower scraper 415 are equidistant from the anilox roller 421 and are separated from each other. The upper sealing plate 412 and lower sealing plate 414 respectively clamp the upper scraper 413 and lower scraper 415 and are retracted into the cutting surfaces of the upper scraper 413 and lower scraper 415. An upper acute angle α' is formed between the upper scraper 413 and the tangent plane of the anilox roller 421, and a lower acute angle α is formed between the lower scraper 415 and the tangent plane of the anilox roller 421. By fixing the upper scraper 413 and the lower scraper 415 with the upper sealing plate 412 and the lower sealing plate 414, the working process of the upper scraper 413 and the lower scraper 415 and the anilox roller 421 is more stable when scraping the high viscosity coating material on the anilox roller 421, and the amount of coating material remaining on the anilox roller 421 is more accurate.

[0065] This embodiment also provides two preferred configuration schemes for the structure of the upper scraper 413 and the lower scraper 415. Reasonably, the angles of the upper acute angle α' and the lower acute angle α are set to 30°-35°, which enables the upper scraper 413 and the lower scraper 415 to scrape the coating material of the anilox roller 421, so that a suitable pressing angle is formed between the tangential planes of the contact points of the upper scraper 413, the lower scraper 415 and the coating material on the anilox roller 421, so that the scraped coating material enters the scraper cavity as much as possible, rather than forming a coating accumulation area on the surface of the upper scraper 413 and the lower scraper 415. As another preferred scheme, a quick nut locking structure can be used to quickly fix the upper sealing plate 412 and the lower sealing plate 414 to the upper scraper 413 and the lower scraper 415, thereby achieving the technical effect of convenient loading and unloading.

[0066] The following describes the operation process of this equipment in detail through various specific working modes:

[0067] like Figure 8 As shown, the present invention completes the coating process by activating the equipment on the first frame 10, the third frame 30, the fourth frame 40, and some equipment on the horizontal frame 50. The specific working process is as follows:

[0068] The substrate to be coated by the first unwinding roller mechanism is transferred to the first clamping roller group 130 via the first unwinding line. After being guided by the transfer roller 54 below the horizontal frame 50, it is transferred to the fourth frame 40 for coating. It is then transferred to the front substrate correction device 52 of the horizontal frame 50 via the aforementioned coating line. The substrate is then tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the second rear substrate correction device 532. During this process, the coating material on the substrate coating surface is dried by the hot air drying tunnel 53.

[0069] The embossing device 60 is set to a disengaged embossing roller group, and the UV curing device 70 is stopped. The dried substrate is guided to the third frame 30 by the pre-embossing guide transfer roller 62, the post-embossing guide transfer roller 63, the pre-UV curing guide transfer roller 72, and the post-UV curing guide transfer roller 73. At this time, the dried substrate enters from the third clamping roller group 330 and is cooled by the front cooling roller 311 and the rear cooling roller 312. It is then transported along the third winding line. During the winding process, the third kissing roller mechanism 322 is activated to maintain the adhesion of the coating substrate roll, so that the coating substrate is wound up by the third winding device 320, and the coating work is completed.

[0070] like Figure 9 As shown, the present invention completes the dry lamination process by activating the equipment on the first frame 10, the second frame 20, the fourth frame 40, and some equipment on the horizontal frame 50. The specific working process is as follows:

[0071] The substrate to be coated by the first unwinding roller mechanism is transferred to the first clamping roller group 130 via the first unwinding line. After being guided by the transfer roller 54 below the horizontal frame 50, it is transferred to the fourth frame 40 for coating. It is then transferred to the front substrate correction device 52 of the horizontal frame 50 via the aforementioned coating line. The substrate is then tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the first rear substrate correction device 531. During this process, the coating material on the substrate coating surface is dried by the hot air drying tunnel 53.

[0072] The second unwinding roller mechanism on the second frame 20, via the aforementioned second unwinding line, transmits the substrate to be laminated to the second clamping roller group 230. At this time, the dried substrate enters from the second clamping roller group 230 and runs with the substrate to be laminated in the gap between the rollers of the second clamping roller group 230 and is laminated. After lamination by the second clamping roller group 230, the substrate that has completed dry lamination is transmitted along the second winding line. During the winding process, the second kissing roller mechanism 222 is activated to maintain the bonding of the coated substrate roll, so that the substrate that has completed dry lamination is wound up by the second winding device 220, thus completing the dry lamination work.

[0073] In the preferred embodiment, the second clamping roller group 230 uses a water-cooled back pressure roller 232 and a paired hot pressure roller 233 that clamp each other. During the dry lamination process, the hot pressure roller 233, driven by the second drive cylinder 231, and the water-cooled back pressure roller 232 together press the dried substrate and the substrate to be laminated. The hot pressure roller 233, connected to an external mold temperature controller, adheres to the dried substrate and maintains the heating of the dried substrate. The water-cooled back pressure roller 232, connected to an external cooling water circulation system, adheres to the substrate to be laminated and maintains the cooling of the substrate to be laminated. Due to the drastic temperature change, the dried substrate and the substrate to be laminated expand and shrink, resulting in substrate misalignment during the lamination process.

[0074] During the dry lamination process, the dried substrate and the substrate to be laminated may not yet have achieved sufficient lamination effect. Therefore, maintaining the overall tension stability of the dry-laminated substrate and keeping it stiff on the second winding line is crucial. In this embodiment, three transmission rollers are used to tension and guide the substrate on both sides, then to an EP valve-adjustable cylinder roller for tension stabilization. Two more transmission rollers then tension and guide the substrate on both sides before the second winding mechanism completes the winding. During this process, the tension is adjusted by the EP valve-adjustable cylinder roller, and the dry lamination tension at the front and rear sections of the EP valve-adjustable cylinder roller is maintained.

[0075] Both surfaces of the composite substrate maintain a tensioned guiding transmission state, which can effectively prevent the dried substrate and the substrate to be laminated from shifting relative to each other along the coating surface, thereby ensuring the equipment completes the dry lamination process.

[0076] like Figure 10 As shown, the present invention completes the online coating process after peeling by activating the equipment on the first rack 10, the third rack 30, the fourth rack 40, and some equipment on the horizontal rack 50. The specific working process is as follows:

[0077] Taking a substrate with a release film as an example, this type of double-layer substrate with a peelable layer is mounted on the first unwinding roller mechanism on the first frame 10, and the first clamping roller group 130 is pre-adjusted to a separated state through the control system. The substrate with the release film of the first unwinding roller mechanism is transported to the first clamping roller group 130 through the aforementioned first unwinding line, and the release film is separated at the first clamping roller group 130.

[0078] Then, the separated release film is transported to the first winding mechanism along the first winding line for winding. The separated substrate to be coated is guided by the transfer roller 54 below the horizontal frame 50 to the fourth frame 40 for coating. It is then transported to the front substrate correction device 52 of the horizontal frame 50 via the aforementioned coating line. The substrate is then tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the second rear substrate correction device 532. During this process, the coating material on the substrate coating surface is dried by the hot air drying tunnel 53.

[0079] The embossing device 60 is set to a disengaged embossing roller group, and the UV curing device 70 is stopped. The dried substrate is guided to the third frame 30 by the pre-embossing guide transfer roller 62, the post-embossing guide transfer roller 63, the pre-UV curing guide transfer roller 72, and the post-UV curing guide transfer roller 73. At this time, the dried substrate enters from the third clamping roller group 330 and is cooled by the front cooling roller 311 and the rear cooling roller 312. It is then transported along the third winding line. During the winding process, the third kissing roller mechanism 322 is activated to maintain the adhesion of the coating substrate roll, so that the coating substrate is wound by the third winding device 320, completing the online peeling and coating work.

[0080] like Figure 11 As shown, the present invention completes the coating process by activating the equipment on the first frame 10, the third frame 30, the fourth frame 40, and some equipment on the horizontal frame 50. The specific working process is as follows:

[0081] The substrate to be coated by the first unwinding roller mechanism is transferred to the first clamping roller group 130 via the first unwinding line. After being guided by the transfer roller 54 below the horizontal frame 50, it is transferred to the fourth frame 40 for coating. It is then transferred to the front substrate correction device 52 of the horizontal frame 50 via the aforementioned coating line. The substrate is then tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the second rear substrate correction device 532. During this process, the coating material on the substrate coating surface is dried by the hot air drying tunnel 53.

[0082] The embossing device 60 is set to a disengaged embossing roller assembly, and the UV curing device 70 is activated. The dried substrate is guided to the UV curing device 70 by the pre-embossing guide roller 62, the post-embossing guide roller 63, and the pre-UV curing guide roller 72. The UV curing device 70 further cures the coating material on the substrate coating surface by using a UV LED dot matrix light source 71. Then, it is guided to the third frame 30 by the post-UV curing guide roller 73. At this time, the dried substrate enters from the third clamping roller assembly 330 and is cooled by the front cooling roller 311 and the rear cooling roller 312. It is then transported along the third winding line. During the winding process, the third kissing roller mechanism 322 is activated to maintain the adhesion of the coated substrate roll, so that the coated substrate is wound up by the third winding device 320, completing the post-coating UV curing work.

[0083] like Figure 12 As shown, the present invention completes the coating process by activating the equipment on the first frame 10, the third frame 30, the fourth frame 40, and the equipment on the horizontal frame 50. The specific working process is as follows:

[0084] The substrate to be coated by the first unwinding roller mechanism is transferred to the first clamping roller group 130 via the first unwinding line. After being guided by the transfer roller 54 below the horizontal frame 50, it is transferred to the fourth frame 40 for coating. It is then transferred to the front substrate correction device 52 of the horizontal frame 50 via the aforementioned coating line. The substrate is then tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the second rear substrate correction device 532. During this process, the coating material on the substrate coating surface is dried by the hot air drying tunnel 53.

[0085] The upper embossing roller 61 and lower embossing roller 64 of the embossing device 60 are paired to form a clutch-type embossing roller group, which is in a pressed state. The UV curing device 70 is activated, and the dried substrate is guided by the pre-embossing guide transfer roller 62 to be embossed in the clutch-type embossing roller group. Then, the embossed substrate is guided to the UV curing device 70 by the post-embossing guide transfer roller 63 and the pre-UV curing guide transfer roller 72. The UV curing device 70 further cures the coating material on the coated surface of the embossed substrate by UV LED dot matrix light source 71. Then, it is guided to the third frame 30 by the post-UV curing guide transfer roller 73. At this time, the dried substrate enters from the third clamping roller group 330 and is cooled by the front cooling roller 311 and the rear cooling roller 312. It is then transported along the third winding line. During the winding process, the third kissing roller mechanism 322 is activated to maintain the adhesion of the coated substrate roll, so that the coated substrate is wound by the third winding device 320, completing the post-coating UV curing work.

[0086] like Figure 13 As shown, the present invention completes the heat-bonding transfer process by activating the equipment on the first frame 10, the second frame 20, the fourth frame 40, and some equipment on the horizontal frame 50. The specific working process is as follows:

[0087] By stopping the supply of coating material and adjusting the sealing cavity scraper 41 and anilox roller 421 to not contact the substrate, the substrate of the first unwinding roller mechanism is transferred to the first clamping roller group 130 via the aforementioned first unwinding line. After being guided by the transfer roller 54 below the horizontal frame 50, it is transferred to the fourth frame 40. The coating device only acts as a guide and transfer mechanism for transferring and adjusting the tension of the substrate. The substrate is transferred along the aforementioned coating line to the front substrate correction device 52 of the horizontal frame 50. Then, the substrate is tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the first rear substrate correction device 531. During this process, the substrate is heated by the hot air drying tunnel 53.

[0088] The second unwinding roller mechanism on the second frame 20, via the aforementioned second unwinding line, transmits the substrate to be transferred to the second clamping roller group 230. At this time, the heated substrate enters from the second clamping roller group 230 and runs with the substrate to be transferred in the gap between the rollers of the second clamping roller group 230, so that the pattern on the heated substrate is transferred to the substrate to be transferred. After the substrate to be transferred is transferred at the second clamping roller group 230, the heat-bonded transfer substrate is transmitted along the second winding line. During the winding process, the second kissing roller mechanism 222 is activated to maintain the bonding coating substrate roll, so that the substrate that has completed the heat-bonded transfer is wound up by the second winding device 220, thus completing the heat-bonded transfer work.

[0089] In the preferred embodiment, the second clamping roller group 230 employs a water-cooled back pressure roller 232 and a paired hot pressure roller 233 that clamp each other. During the heat transfer process, the hot pressure roller 233, driven by the second drive cylinder 231, together with the water-cooled back pressure roller 232, presses the heated substrate and the substrate to be transferred. The hot pressure roller 233, connected to an external mold temperature controller, adheres to the heated substrate and maintains the heating of the heated substrate, ensuring that the heated substrate can maintain a suitable heat transfer temperature and transfer the print to the substrate to be transferred. The water-cooled back pressure roller 232, connected to an external cooling water circulation system, adheres to the substrate to be transferred and maintains the cooling of the substrate to be transferred, preventing the heated substrate and the substrate to be transferred from expanding or shrinking due to drastic temperature changes. It also ensures that the ink pattern on the heated substrate can be accurately transferred to the substrate to be transferred due to the thermal effect and roller pressure, preventing the occurrence of pattern alignment deviation during the process.

[0090] During the transport of the heat-bonded transfer substrate along the second winding line, the heated substrate and the substrate to be transferred are transported in a bonded state. Since the pattern ink between the heated substrate and the substrate to be transferred may not be fully cured, it is crucial to maintain the overall tension stability of the heat-bonded transfer substrate and to keep the printed substrate on the second winding line stiff. In this embodiment, three transport rollers are used to tension and guide the two sides of the heat-bonded transfer substrate, which is then transported to the EP valve-adjustable cylinder adjusting roller for tension stabilization. Two more transport rollers then tension and guide the two sides of the heat-bonded transfer substrate, and finally, the second winding mechanism completes the winding. During this process, while the EP valve-adjustable cylinder adjusting roller is adjusting the tension, both surfaces of the heat-bonded transfer substrate before and after the EP valve-adjustable cylinder adjusting roller maintain a tensioned guiding state, effectively preventing relative displacement between the heated substrate and the substrate to be transferred along the coating surface, thus ensuring the effectiveness of the heat-bonded transfer process.

[0091] like Figure 14 As shown, the present invention completes the rewinding process after unwinding by activating the equipment on the first frame 10. The specific working process is as follows:

[0092] By adjusting the separation of the clamping rollers of the first clamping roller group 130, that is, by driving the swing roller 133 relative to the driven roller 132 through the first driving cylinder 131, the substrate of the first unwinding roller mechanism is then transmitted to the driven roller 132 of the first clamping roller group 130 via the first unwinding line, and then transmitted to the first winding roller mechanism 121 via the first winding line. The swing roller 133 is again driven by the first driving cylinder 131 to press against the driven roller 132. During the winding process, the first kissing roller mechanism 122 is activated to maintain the bonding of the coated substrate roll, so that the substrate is wound up by the first winding device 120, completing the rewinding work after unwinding.

[0093] likeFigure 15 As shown, the present invention completes the online peeling and coating process by activating the equipment on the first frame 10, the second frame 20, the fourth frame 40, and some equipment on the horizontal frame 50. The specific working process is as follows:

[0094] Taking a substrate with a release film as an example, this type of double-layer substrate with a peelable layer is mounted on the first unwinding roller mechanism on the first frame 10, and the first clamping roller group 130 is pre-adjusted to a separated state through the control system. The substrate with the release film of the first unwinding roller mechanism is transported to the first clamping roller group 130 through the aforementioned first unwinding line, and the release film is separated at the first clamping roller group 130.

[0095] Then, the separated release film is transported to the first winding mechanism along the first winding line for winding. The separated substrate to be coated is guided by the transfer roller 54 below the horizontal frame 50 to the fourth frame 40 for coating. It is then transported to the front substrate correction device 52 of the horizontal frame 50 via the aforementioned coating line. The substrate is then tensioned and guided by the front substrate correction device 52, the arc-shaped oven guide rollers 51, and the first rear substrate correction device 531. During this process, the coating material on the substrate coating surface is dried by the hot air drying tunnel 53.

[0096] The second unwinding roller mechanism on the second frame 20, via the aforementioned second unwinding line, transmits the substrate to be laminated to the second clamping roller group 230. At this time, the dried substrate enters from the second clamping roller group 230 and runs with the substrate to be laminated in the gap between the rollers of the second clamping roller group 230 and is laminated. After lamination by the second clamping roller group 230, the laminated substrate is transmitted along the second winding line. During the winding process, the second kissing roller mechanism 222 is activated to maintain the bonding of the coated substrate roll, so that the laminated substrate is wound up by the second winding device 220, completing the lamination work.

[0097] In the preferred embodiment, the second clamping roller group 230 uses a water-cooled back pressure roller 232 and a paired hot pressure roller 233 that clamp each other. During the process of the hot pressure roller 233 being driven by the second drive cylinder 231 and the water-cooled back pressure roller 232 pressing the dried substrate and the substrate to be laminated together, the hot pressure roller 233 connected to the external mold temperature controller is in contact with the dried substrate and maintains the heating of the dried substrate, while the water-cooled back pressure roller 232 connected to the external cooling water circulation is in contact with the substrate to be laminated and maintains the cooling of the substrate to be laminated. Due to the drastic temperature change, the dried substrate and the substrate to be laminated expand and shrink, resulting in the occurrence of substrate misalignment during the lamination process.

[0098] During the transport of the laminated substrate along the second winding line, the dried substrate and the substrate to be laminated may not yet have achieved sufficient lamination. Maintaining stable overall tension on the laminated substrate and keeping it stiff on the second winding line is crucial. In this embodiment, three transport rollers are used to tension and guide the two sides of the laminated substrate, which is then transported to an EP valve-adjustable cylinder roller for tension stabilization. Two more transport rollers then provide tension and guidance to the two sides of the laminated substrate before the second winding mechanism completes the winding. During this process, the two surfaces of the laminated substrate remain under tension and guidance during tension adjustment by the EP valve-adjustable cylinder roller. This effectively prevents relative displacement between the dried substrate and the substrate to be laminated along the coating surface, ensuring the lamination process is completed effectively.

[0099] The control method of this invention is automatic control through a programmable control system such as a PLC control system. The control circuit of the control system can be implemented by those skilled in the art through programming. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0100] In the description of this invention, it should be understood that the terms "above", "front end", "rear end", "front section", "rear section", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0101] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0102] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional coating machine, comprising a control system and a frame, characterized in that: The first frame is provided with a first tension adjustment mechanism that connects and adjusts the substrate tension between the first unwinding device and the first winding device. A first pressure roller group is provided at the rear end of the stroke of the first tension adjustment mechanism. The first tension adjustment mechanism consists of at least one transmission roller and at least one EP valve-adjustable cylinder adjustment roller disposed between the first unwinding roller and the first pressure roller group, and at least one transmission roller and at least one EP valve-adjustable cylinder adjustment roller disposed between the first winding roller and the first pressure roller group. The second frame is equipped with a second tension adjustment mechanism that connects and adjusts the substrate tension between the second unwinding device and the second winding device. A second pressure roller group is provided at the front end of the stroke of the second tension adjustment mechanism. The second tension adjustment mechanism consists of at least one transmission roller, at least one tension fine-tuning transmission roller mechanism, and at least one EP valve-adjustable cylinder adjustment roller disposed between the second unwinding roller and the second pressure roller group. The third frame is equipped with a third tension adjustment mechanism that connects and adjusts the substrate tension between the third winding device and the cooling traction device. A third pressure roller group is provided at the front end of the stroke of the third tension adjustment mechanism. The third tension adjustment mechanism consists of at least one transmission roller and at least one EP valve-regulated cylinder adjustment roller located between the third winding roller and the cooling traction device. The fourth frame is equipped with a coating device. The substrate tension is adjusted by the coating tension adjustment device. The coating device controls the amount of coating material applied by the anilox roller through the sealed cavity scraper. The pressing cylinder drives the pressing roller to press the substrate, so that the coating material on the anilox roller is transferred to the surface of the substrate. The coating roller is driven by an explosion-proof motor to rotate in the opposite direction to the substrate transmission direction; the coating tension adjustment device consists of at least one transmission roller, at least one tension fine-tuning transmission roller mechanism, and at least one EP valve-adjustable cylinder adjustment roller located between the inlet end and the anilox roller. The horizontal frame is set above the first, second, third and fourth frames. The hot air drying duct of the hot drying device is set on the horizontal frame. Several oven guide rollers are arranged along the horizontal frame from the front end to the rear end and form an arc-shaped tension surface with each other. The UV curing device and the embossing device are located between the transmission strokes of the hot drying device and the cooling traction device. Both the embossing device and the UV curing device are equipped with guide transmission rollers. The EP valve-adjustable cylinder adjusting roller includes an EP valve, an EP valve-adjustable cylinder, an adjusting roller, and an adjusting roller drive motor. The control system adjusts the threshold signal range corresponding to the tension threshold range through the EP valve. The potentiometer detects the position of the adjusting roller and outputs a data signal to the control system, which is compared with the threshold signal range. The control system controls the EP valve-adjustable cylinder to adjust the position of the adjusting roller and controls the adjusting roller drive motor to adjust the speed and torque of the adjusting roller, so that the data signal does not exceed the threshold signal range. When the substrate is transmitted through the first, second, third, and fourth tension adjustment mechanisms, the roll wrap angle of the substrate on the EP valve-adjustable cylinder adjusting roller is not less than 90°.

2. The multi-functional coating machine as described in claim 1, characterized in that: The first clamping roller group consists of a swing roller and a paired driven roller that are mutually clamped by a first driving cylinder.

3. The multi-functional coating machine as described in claim 1, characterized in that: The second clamping roller group consists of a water-cooled back pressure roller and a paired hot pressure roller that are clamped together by a second drive cylinder.

4. The multi-functional coating machine as described in claim 1, characterized in that: The third clamping roller group consists of a swing roller and a paired driven roller that are mutually clamped by a third driving cylinder; the cooling traction device consists of two water-cooled front and rear cooling rollers arranged along the front and rear of the transmission stroke; the third clamping roller group consists of a swing roller and a paired front cooling roller that are mutually clamped by a third driving cylinder.

5. The multi-functional coating machine as described in claim 1, characterized in that: The sealed cavity scraper is equipped with a paint tank, a scraper chamber, and a diaphragm pump. The scraper part consists of an upper scraper and a lower scraper. The scraper chamber is arranged between the upper and lower scrapers. The lower scraper is provided with an overflow slope that leads to the scraper chamber. The scraper chamber and the paint tank are in fluid communication. The diaphragm pump pumps the coating material in the paint tank and / or the scraper chamber to the outside of the paint tank.

6. The multi-functional coating machine as described in claim 5, characterized in that: The scraper section also includes an upper sealing plate and a lower sealing plate; the upper scraper and the lower scraper are equidistant from the anilox roller and are separated from each other, and the upper and lower sealing plates correspondingly clamp the upper and lower scrapers and are retracted into the cutting surfaces of the upper and lower scrapers; an upper acute angle is formed between the upper scraper and the cutting plane of the anilox roller, and a lower acute angle is formed between the lower scraper and the cutting plane of the anilox roller.

7. The multi-functional coating machine as described in claim 1, characterized in that: The coating tension adjustment device also includes a common rotating arm double transfer roller mechanism. The angled rotating arm of the common rotating arm double transfer roller mechanism is hinged to the fourth frame. The pressing roller and a transfer roller are respectively arranged at the two swing ends of the angled rotating arm. The first swing end is a free swing end, and the second swing end is driven by the pressing cylinder to make the angled rotating arm swing along the hinge axis and adjust the distance between the pressing roller and the anilox roller.

8. The multi-functional coating machine as described in any one of claims 1-7, characterized in that: The tension fine-tuning transmission roller mechanism includes a tension fine-tuning transmission roller shafted to a tension fine-tuning transmission roller holder, and a mechanical knob that drives the tension fine-tuning transmission roller holder to reciprocate along the frame.

9. The multi-functional coating machine as described in any one of claims 1-7, characterized in that: The hot air drying tunnel is equipped with a tunnel body, a fan, a temperature control system, finned heating elements, hot air nozzles, return air vents, and an exhaust duct. The hot air nozzles are evenly arrayed along the tunnel body and point towards the substrate coating surface. The fan transmits hot air flow heated by the finned heating elements to the hot air nozzles. The return air vents in the tunnel body are connected to the exhaust duct. The temperature control system monitors and adjusts the temperature of the finned heating elements, the flow rate of the hot air nozzles, and the exhaust speed of the return air vents. The inlet and / or outlet of the hot air drying tunnel are equipped with substrate correction devices.

10. The multifunctional coating machine as described in any one of claims 1-7, characterized in that: Along the substrate travel direction, the embossing device and the UV curing device are arranged in sequence before and after each other. The embossing roller group of the embossing device is a clutch-type embossing roller group, and the UV curing device is a UV LED dot matrix light source curing device that does not contact the substrate.

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