A functional pet film processing coating device

Abstract

The application discloses a functional PET film processing coating device and relates to the technical field of film processing.The functional PET film processing coating device comprises a machine body, the machine body comprises a chassis, a cover plate is arranged at the top of the chassis, unwinding frames and winding frames are arranged on the two sides of the outer surface of the chassis, a tension buffer mechanism and a coating mechanism are arranged on the inner side of the unwinding frame, and an exhaust mechanism is arranged on the top of the cover plate.When the film is normally worn and pre-tensioned, the film tension drives the guide roller and the rotating shaft to drive the movable plate to rotate by a small angle, and the torsional spring is twisted to generate a balance torque;when the film is operated at a constant speed and constant tension, the torsional spring is slightly moved with the movable plate;when the coating device is speed-adjusted or the roll is replaced, if the tension suddenly increases, the centrifugal block generates a reverse torque to make the movable plate rotate by a small angle to absorb the impact and quickly restore the tension;if the tension suddenly decreases, the torsional spring and the centrifugal force jointly push back the movable plate to prevent relaxation, external energy or sensors are not needed, the tension change can be responded to at a microsecond level, and the delay is low.

Description

Technical Field

[0001] This invention relates to the field of thin film processing technology, specifically to a coating apparatus for processing functional PET films. Background Technology

[0002] Thin film coating equipment is a precision industrial device used to uniformly coat functional coatings onto the surface of thin films. It works by placing a rolled thin film substrate onto a feed roller, allowing the film to pass through a coating head, and then uniformly applying liquid or molten coating material to the film surface using a specific process. The coated wet film is then placed in an oven where hot air and ultraviolet light promote drying, curing, or cross-linking of the coating, forming a stable functional layer. Finally, the treated film is wound up on a take-up roller to form the finished product, which is widely used in packaging, electronics, optics, medical, and new energy fields. However, existing coating equipment has the following shortcomings:

[0003] In existing coating equipment, the adjustment of operating speed or roll changing typically relies on external energy or elastic elements to buffer film tension. Its response speed is limited by the closed-loop chain delay formed by sensor detection, controller calculation, and actuator action, and it cannot achieve variable stiffness adjustment that automatically matches the rotation speed, which has certain limitations. Since the glue storage box is mostly fastened with bolts, it is not possible to operate quickly when changing glue types or cleaning the glue storage box, which affects the production changeover and cleaning efficiency of the coating equipment. Furthermore, the exhaust system of the coating equipment only uses a fan to extract exhaust gas and cannot automatically adjust the exhaust volume according to the temperature, which increases the operating cost of the coating equipment.

[0004] Therefore, we propose a coating apparatus for processing functional PET films to address the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a coating apparatus for processing functional PET films, which achieves faster response speed, simpler replacement operation and lower cost venting function by setting up a tension buffer mechanism, a coating mechanism and an venting mechanism, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coating apparatus for processing functional PET film, comprising a machine body, the machine body comprising a base frame, a cover plate installed at the top of the base frame, and an unwinding frame and a winding frame respectively installed on both sides of the outer surface of the base frame, a tension buffer mechanism and a coating mechanism provided on the inner side of the unwinding frame, and an exhaust mechanism provided at the top of the cover plate.

[0007] The take-up frame is rotatably connected to the inner side of a take-up roller, and the unwinding frame is rotatably connected to the inner side of a unwinding roller. A first motor is installed on one end of the outer surface of both the take-up roller and the unwinding roller. A transmission roller is rotatably connected to the inner side of the base frame, the unwinding frame, and the take-up frame. The tension buffer mechanism includes a fixed plate, which is fixedly installed on the inner side of the unwinding frame. A ball bearing is rotatably connected to the inner side of the fixed plate. A rotating shaft is fixedly installed on one side of the outer surface of the ball bearing. A movable plate is slidably connected to the inner side of the rotating shaft. A guide roller is rotatably connected to the inner side of the movable plate. A centrifugal block is slidably connected to one side of the outer surface of the movable plate. A telescopic rod is installed on one side of the outer surface of the centrifugal block. A storage groove is opened on both sides of the outer surface of the centrifugal block. A first return spring is fixedly installed on one end of the inner surface of the storage groove. A locking block is fixedly installed on one end of the outer surface of the first return spring.

[0008] Preferably, a first hydraulic cylinder is installed on one side of the outer surface of the base frame, the output end of the first hydraulic cylinder is connected to one side of the outer surface of the cover plate, and curing lamps are installed at the bottom end of the cover plate and the top end of the base frame.

[0009] Preferably, a feeder is provided at the top of the base frame. The feeder includes a second motor, a gear and a toothed chain. The second motor is installed on one side of the outer surface of the base frame. A gear is fixedly installed at one end of the transmission roller surface at the top of the base frame. A toothed chain meshes with the outer surface of the gear. The outer surface of one set of gears is connected to the output end of the second motor.

[0010] Preferably, torsion springs are fixedly installed at both ends of the outer surface of the rotating shaft, and the other end of the outer surface of the torsion springs is fixedly installed on the outer surface of the fixing plate. A limit rod is fixedly installed on one side of the outer surface of the fixing plate. The limit rods are symmetrically distributed on both sides of the outer surface of the rotating shaft. Two sets of movable plates are respectively installed at both ends of the rotating shaft near the ball bearings. Mounting holes are opened on the outer surfaces of the movable plates and the rotating shaft. Fixing bolts are rotatably connected to the inner side of the mounting holes.

[0011] Preferably, the telescopic rod is installed on the inner side of the movable plate, a plug is fixedly installed on one side of the outer surface of the locking block, and slots are provided on both sides of the outer surface of the movable plate, with the plug inserted into the inner side of the slot.

[0012] Preferably, the coating mechanism includes a second hydraulic cylinder, which is installed on both sides of the inner surface of the unwinding frame, and a support plate is installed at the output end of the second hydraulic cylinder. A coating frame is rotatably connected to one side of the outer surface of the support plate. A coating head and a glue storage box are installed on the surface of the coating frame. The bottom end of the coating head is connected to the top end of the glue storage box. Fixing blocks are fixedly installed on both sides of the outer surface of the coating frame.

[0013] Preferably, the outer surface of the glue storage box is provided with placement grooves on both sides, a second return spring is fixedly installed at one end of the inner surface of the placement groove, a connecting rod is fixedly installed at one end of the outer surface of the second return spring, the connecting rod is slidably connected to the inner side of the placement groove, and a pull rod is slidably connected to the inner side of the fixing block and the connecting rod.

[0014] Preferably, the exhaust mechanism includes a resonant tube, which is fixedly installed on the inner side of the cover plate, and a lower water storage box is installed at the bottom of the inner side of the resonant tube. A hot end heat exchanger is provided at the top of the lower water storage box, a wet plate stack is provided at the top of the hot end heat exchanger, an upper water storage box is provided at the top of the wet plate stack, and a capillary core is connected to both the bottom of the upper water storage box and the top of the wet plate stack.

[0015] Preferably, a cold-end heat exchanger is provided at the top of the upper water storage box. Both the cold-end heat exchanger and the hot-end heat exchanger are needle-fin heat exchangers. A water supply pipe is fixedly installed on one side of the outer surface of both the lower and upper water storage boxes. A water storage tank is installed at the other end of the outer surface of the water supply pipe. The water storage tank is installed on the top of the cover plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention achieves a faster response speed through the setting of a tension buffer mechanism. During the normal film threading and pre-tensioning stages, the film tension causes the guide roller and rotating shaft to rotate the movable plate by a small angle, and the torsion spring to generate a balancing torque. During constant speed and constant tension operation, the torsion spring follows the movable plate to make micro-movements. When the coating device adjusts its speed or changes rolls, if the film tension suddenly increases, the centrifugal block generates a reverse torque, causing the movable plate to rotate by a small angle to absorb the impact, and the tension is quickly restored. If the film tension suddenly decreases, the torsion spring and centrifugal force push the movable plate back together to prevent slack. This allows the coating device to respond to tension changes in microseconds without external energy or sensors, with low delay. The limit rod limits the angle of the rotating shaft, and the fixing bolt fixes the movable plate. When processing different films, the position of the centrifugal block needs to be adjusted according to the rated tension of the film. First, pull the locking block to disengage the insertion rod from the slot. After adjusting the position of the centrifugal block, release the locking block. The second reset spring resets the locking block to return it to the receiving groove to complete the adjustment, thus broadening the application range of the coating device.

[0018] 2. This invention features a coating mechanism that simplifies replacement procedures. First, pull the lever away from the connecting rod, then press the connecting rod into the placement slot. The connecting rod compresses the second return spring, allowing the glue storage box to be removed for replacement. Similarly, the second return spring can be used to reset the connecting rod, allowing it to pass through the connecting frame and the lever to be inserted into the connecting rod, thus fixing the glue storage box in place. Furthermore, the second hydraulic cylinder can move the support frame and coating frame, adjusting the spacing between the coating head and the transmission roller to suit the film coating distance, facilitating product changeover and cleaning of the coating device.

[0019] 3. This invention incorporates an exhaust mechanism, achieving lower-cost exhaust functionality. Exhaust gas first passes through the lower water storage box and contacts the hot-end heat exchanger, where it is heated. The cold-end heat exchanger, located at the top, contacts the air and has a lower temperature. This increased temperature difference between the two ends causes the exhaust gas to expand and pass through the wet plate stack and the upper water storage layer, exiting from the cold-end heat exchanger. Water in the upper water storage layer permeates to the surface of the wet plate stack through capillary cores. The lower end, with its higher temperature, seeps water evaporating and absorbing heat; the upper end, with its lower temperature, sees water vapor condensing and releasing heat, accelerating the temperature difference change. When the temperature difference reaches a certain level... At the critical value, the thermal expansion and contraction of the exhaust gas generates stable sound waves. These sound waves form standing waves within the resonant tube. Near the node, the exhaust gas flows in a fixed direction, forming an acoustic flow that achieves exhaust gas emission. The lower water storage box collects dripping water droplets. The upper and lower water storage boxes are connected to a water tank via water pipes to achieve water circulation. The exhaust flow rate is determined by the sound pressure amplitude. When the temperature or exhaust gas volume inside the cover increases, the temperature difference increases, the sound pressure intensifies, and the exhaust flow rate automatically increases. This eliminates the need for moving parts and utilizes waste heat to achieve adaptive exhaust gas emission, resulting in low energy consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a coating apparatus for processing functional PET films according to the present invention;

[0021] Figure 2 This is a top view of a coating apparatus for processing functional PET films according to the present invention;

[0022] Figure 3 This is a cross-sectional view of a coating apparatus for processing functional PET films according to the present invention;

[0023] Figure 4 This is an exploded perspective view of the tension buffer mechanism in a coating apparatus for processing functional PET film according to the present invention.

[0024] Figure 5 This invention relates to a coating apparatus for processing functional PET films. Figure 4 Enlarged 3D view of the structure at point A in the middle;

[0025] Figure 6 This is a perspective view of a portion of the rotating shaft in a coating apparatus for processing functional PET film according to the present invention.

[0026] Figure 7 This is a side perspective view of the coating mechanism in a coating apparatus for processing functional PET film according to the present invention.

[0027] Figure 8 This is a partial perspective view of the adhesive storage box in a coating apparatus for processing functional PET film according to the present invention;

[0028] Figure 9This is a three-dimensional cross-sectional view of the exhaust mechanism in a coating apparatus for processing functional PET film according to the present invention.

[0029] Figure 10 This is an exploded perspective view of the exhaust mechanism in a coating apparatus for processing functional PET film according to the present invention.

[0030] In the diagram: 1. Machine body; 101. Base frame; 102. Cover plate; 103. First hydraulic cylinder; 104. Unwinding frame; 105. Rewinding frame; 106. Rewinding roller; 107. Unwinding roller; 108. First motor; 109. Transmission roller; 110. Curing lamp; 111. Feeder; 2. Tension buffer mechanism; 201. Fixed plate; 202. Ball bearing; 203. Rotating shaft; 204. Torsion spring; 205. Limiting rod; 206. Movable plate; 207. Fixing bolt; 208. Guide roller; 209. Centrifugal block; 210. Telescopic rod; 211. Receiving trough; 212. 213. First return spring; 214. Locking block; 215. Insert rod; 216. Slot; 3. Coating mechanism; 301. Second hydraulic cylinder; 302. Support plate; 303. Coating rack; 304. Coating head; 305. Glue storage box; 306. Fixing block; 307. Placement slot; 308. Second return spring; 309. Connecting rod; 310. Pull rod; 4. Exhaust mechanism; 401. Resonant tube; 402. Lower water storage box; 403. Hot end heat exchanger; 404. Wet plate stack; 405. Upper water storage box; 406. Cold end heat exchanger; 407. Water supply pipe; 408. Water storage tank. Detailed Implementation

[0031] 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.

[0032] Please see the appendix Figure 1 - Appendix Figure 10 As shown, the present invention provides a technical solution: a coating apparatus for processing functional PET film, including a body 1, the body 1 including a base frame 101, a cover plate 102 installed on the top of the base frame 101, and an unwinding frame 104 and a winding frame 105 respectively installed on both sides of the outer surface of the base frame 101. A tension buffer mechanism 2 and a coating mechanism 3 are provided on the inner side of the unwinding frame 104, and an exhaust mechanism 4 is provided on the top of the cover plate 102.

[0033] Example 1, according to Figure 1-6As shown, a take-up roller 106 is rotatably connected to the inner side of the take-up frame 105, and a release roller 107 is rotatably connected to the inner side of the unwinding frame 104. A first motor 108 is installed on one end of the outer surface of both the take-up roller 106 and the unwinding roller 107. A transmission roller 109 is rotatably connected to the inner side of the base frame 101, the unwinding frame 104, and the take-up frame 105. The tension buffer mechanism 2 includes a fixed plate 201, which is fixedly installed on the inner side of the unwinding frame 104. A ball bearing 202 is rotatably connected to the inner side of the fixed plate 201. A rotating shaft 203 is fixedly installed on one side of the outer surface of the ball bearing 202. The inner side of the rotating shaft 203 slides. A movable plate 206 is connected, and a guide roller 208 is rotatably connected to the inner side of the movable plate 206. A centrifugal block 209 is slidably connected to one side of the outer surface of the movable plate 206. A telescopic rod 210 is installed on one side of the outer surface of the centrifugal block 209. A storage groove 211 is opened on both sides of the outer surface of the centrifugal block 209. A first return spring 212 is fixedly installed at one end of the inner surface of the storage groove 211. A locking block 213 is fixedly installed at one end of the outer surface of the first return spring 212. A first hydraulic cylinder 103 is installed on one side of the outer surface of the base frame 101. The output end of the first hydraulic cylinder 103 is connected to one side of the outer surface of the cover plate 102. Both the bottom end of the cover plate 102 and the top end of the base frame 101 are equipped with curing lamps 110. The top end of the base frame 101 is equipped with a feeder 111, which includes a second motor, gears, and a gear chain. The second motor is mounted on one side of the outer surface of the base frame 101. A gear is fixedly mounted on one end of the surface of the transmission roller 109 located at the top of the base frame 101. A gear chain meshes with the outer surface of the gear. The outer surface of one set of gears is connected to the output end of the second motor. Torsion springs 204 are fixedly mounted on both ends of the outer surface of the rotating shaft 203. The other end of the outer surface of the torsion spring 204 is fixedly mounted on the outer surface of the fixing plate 201. A limiting rod 205 is fixedly installed on one side of the outer surface of the fixed plate 201. The limiting rods 205 are symmetrically distributed on both sides of the outer surface of the rotating shaft 203. Two sets of movable plates 206 are respectively installed at both ends of the rotating shaft 203 near the ball bearings 202. The outer surfaces of the movable plates 206 and the rotating shaft 203 are provided with mounting holes. The inner side of the mounting holes is rotatably connected with a fixing bolt 207. The telescopic rod 210 is installed on the inner side of the movable plate 206. A plug rod 214 is fixedly installed on one side of the outer surface of the locking block 213. Slots 215 are provided on both sides of the outer surface of the movable plate 206. The plug rod 214 is inserted into the inner side of the slot 215.

[0034] The overall effect of Embodiment 1 is as follows: It achieves a faster response speed. During the normal film threading and pre-tensioning stages, the film tension generates a torque on the guide roller 208. The guide roller 208 drives the movable plate 206 and the rotating shaft 203 to rotate a small angle, causing the torsion spring 204 to twist and generate a balancing torque. When the film runs at a constant speed and tension, the movable plate 206 only experiences minor vibrations, and the torsion spring 204 gently follows these minor fluctuations. When the coating device adjusts its operating speed or changes rolls, if the film tension suddenly increases, it will cause the movable plate 206 to rotate to one side. At this time, the centrifugal block 209, which is away from the rotating shaft 203, instantly generates a reverse torque, counteracting the film tension. This allows the movable plate 206 to absorb the impact with only a small rotation angle, and the film tension recovers quickly after the impact is absorbed. If the film tension suddenly decreases, the restoring force of the torsion spring 204 and the centrifugal force of the centrifugal block 209 work together to move the movable plate 206... Pushing it back to its original position prevents film relaxation, allowing the coating device to achieve adaptive variable stiffness adjustment without relying on any external energy or sensors. It absorbs film tension spikes with a microsecond-level response and low delay. In addition, the limit rod 205 can limit the rotation angle of the rotating shaft 203, and the fixing bolt 207 is used to fix the movable plate 206. When processing different types of films, the position of the centrifugal block 209 needs to be adjusted according to the rated tension of the film. By pulling the locking block 213, the first return spring 212 is stretched, causing the insertion rod 214 to disengage from the slot 215. At this time, the centrifugal block 209 can be moved to a suitable position and connected to it by the telescopic rod 210. Then, the locking block 213 is released, the first return spring 212 returns to its original position, and the locking block 213 is retracted into the receiving groove 211. The insertion rod 214 is inserted into the slot 215, thereby completing the adjustment of the position of the centrifugal block 209 and effectively expanding the application range of the coating device.

[0035] Example 2, according to Figure 2 , Figure 7 and Figure 8 As shown, the coating mechanism 3 includes a second hydraulic cylinder 301, which is installed on both sides of the inner surface of the unwinding frame 104. A support plate 302 is installed at the output end of the second hydraulic cylinder 301. A coating frame 303 is rotatably connected to one side of the outer surface of the support plate 302. A coating head 304 and a glue storage box 305 are installed on the surface of the coating frame 303. The bottom end of the coating head 304 is connected to the top end of the glue storage box 305. Fixing blocks 306 are fixedly installed on both sides of the outer surface of the coating frame 303. Placement slots 307 are opened on both sides of the outer surface of the glue storage box 305. A second return spring 308 is fixedly installed at one end of the inner surface of the placement slot 307. A connecting rod 309 is fixedly installed at one end of the outer surface of the second return spring 308. The connecting rod 309 is slidably connected to the inner side of the placement slot 307. Pull rods 310 are slidably connected to the inner sides of the fixing blocks 306 and the connecting rod 309.

[0036] The overall effect of Embodiment 2 is as follows: it achieves a simpler replacement operation. First, pull the lever 310 away from the connecting rod 309, and then press the connecting rod 309 into the placement groove 307. The connecting rod 309 drives the second return spring 308 to compress, at which point the glue storage box 305 can be removed for replacement. Similarly, the second return spring 308 can be used to reset the connecting rod 309 through the connecting frame, and the lever 310 can be inserted into the connecting rod 309, thereby fixing the position of the glue storage box 305. In addition, the second hydraulic cylinder 301 can drive the support frame and the coating frame 303 to move, so that the coating head 304 and the transmission roller 109 are adjusted to a suitable distance for film coating, which provides convenience for product changeover and cleaning of the coating device.

[0037] Example 3, according to Figure 2 , Figure 9 and Figure 10 As shown, the exhaust mechanism 4 includes a resonant tube 401, which is fixedly installed on the inner side of the cover plate 102. A lower water storage box 402 is installed at the bottom of the inner side of the resonant tube 401. A hot-end heat exchanger 403 is provided at the top of the lower water storage box 402. A wet plate stack 404 is provided at the top of the hot-end heat exchanger 403. An upper water storage box 405 is provided at the top of the wet plate stack 404. The bottom end of the upper water storage box 405 is connected to the wet plate stack. The top of each stack 404 is connected to a capillary core. The top of the upper water storage box 405 is equipped with a cold end heat exchanger 406. Both the cold end heat exchanger 406 and the hot end heat exchanger 403 are needle-fin heat exchangers. Water pipes 407 are fixedly installed on one side of the outer surface of the lower water storage box 402 and the upper water storage box 405. A water storage tank 408 is installed at the other end of the outer surface of the water pipe 407. The water storage tank 408 is installed on the top of the cover plate 102.

[0038] The overall effect of embodiment 3 is as follows: it achieves a lower-cost exhaust function. The exhaust gas in the cover plate 102 first passes through the lower water storage box 402 and comes into contact with the hot-end heat exchanger 403, heating the hot-end heat exchanger 403. Meanwhile, the cold-end heat exchanger 406 is in contact with the air at the top and has a lower temperature. The temperature difference between the two ends gradually increases. After the exhaust gas near the hot-end heat exchanger 403 is heated and expands, it slowly passes through the wet plate stack 404 and the upper water storage layer, and finally exits from the cold-end heat exchanger 406. At this time, the water in the upper water storage layer permeates to the surface of the wet plate stack 404 through the capillary core. The temperature at the lower end of the wet plate stack 404 is higher, and the water evaporates and absorbs heat; the temperature at the upper end is lower, and the water vapor condenses and releases heat, accelerating the change in the temperature difference between the two ends. When the temperature difference reaches the resonant tube 401... At the critical value of self-excited oscillation, the thermal expansion and contraction of the exhaust gas generates stable sound waves through the thermoacoustic effect. The sound waves reflect back and forth in the resonant tube 401 to form standing waves. Near the node of the standing wave oscillation, the exhaust gas flows in a fixed direction to form an acoustic flow, thereby completing the exhaust gas emission. The lower water storage box 402 collects the dripping water droplets. Both the upper water storage box 405 and the lower water storage box 402 are connected to the water storage tank 408 through the water supply pipe 407 to realize the input and output of water. The exhaust flow rate is determined by the sound pressure amplitude. When the temperature inside the cover plate 102 rises or the exhaust gas volume increases, the temperature at the hot end heat exchanger 403 rises, the temperature difference increases, the sound pressure increases accordingly, and the exhaust flow rate automatically increases. Without the need for moving parts, the exhaust gas can be self-adaptively emitted using waste heat, resulting in low energy consumption.

[0039] The working principle of the entire equipment is as follows: When using the coating device, the film substrate is first placed on the unloading roller 107, and the guide belt is sequentially passed through the drive roller 109 and guide roller 208 on the unwinding frame 104, the base frame 101, and the winding frame 105 until it is wound onto the winding roller 106. The first motor 108 drives the unloading roller 107 and the winding roller 106 to rotate, while the second motor drives the gears to rotate. These gears drive the gear chain to rotate, thereby driving the remaining gears and their drive rollers 109 to rotate. This gives the drive roller 109 on the base frame 101 a conveying function. Then, the film at the rear of the guide belt sequentially winds along an S-shaped path onto the drive roller 109 and guide roller 208 on the unwinding frame 104. The film then moves... When the coating head 304 is reached, the coating material in the glue storage box 305 can be applied to the film through the coating head 304. The film then moves to the drive roller 109 on the base frame 101 and is dried by the curing lamp 110. After drying, the film moves to the take-up roller 106 via the drive roller 109 on the take-up frame 105 to complete the take-up operation. During normal film threading and pre-tensioning, the film tension generates a torque on the guide roller 208. The guide roller 208 drives the movable plate 206 and the rotating shaft 203 to rotate a small angle, causing the torsion spring 204 to be torsion, generating a balancing torque. When the film is running at constant speed and constant tension, the movable plate 206 only vibrates slightly, and the torsion spring 204 gently follows the slight fluctuations. When the coating device is adjusting its operation... When the coating speed increases or the roll is changed, a sudden increase in film tension causes the movable plate 206 to rotate to one side. The centrifugal block 209, which is away from the rotating shaft 203, instantly generates a reverse torque to counteract the film tension. This allows the movable plate 206 to offset the impact with only a small rotation angle. After the impact is absorbed, the film tension recovers quickly. A sudden decrease in film tension is counteracted by the restoring force of the torsion spring 204 and the centrifugal force of the centrifugal block 209, pushing the movable plate 206 back to its original position to prevent film slack. This allows the coating device to achieve adaptive variable stiffness adjustment without any external energy or sensors, absorbing film tension spikes with a microsecond-level response and low delay. The limit rod 205 restricts the rotation angle of the rotating shaft 203, and the fixing bolt 207 fixes the movable plate 206. This allows for the processing of different types of... When coating a film, the position of the centrifugal block 209 needs to be adjusted according to the rated tension of the film. Pulling the locking block 213 causes the first return spring 212 to stretch, moving the insertion rod 214 away from the slot 215. At this time, the centrifugal block 209 can be moved to a suitable position and connected to it via the telescopic rod 210. Then, the locking block 213 is released, and the first return spring 212 resets the locking block 213 back into the storage groove 211, while the insertion rod 214 is inserted into the slot 215, thus completing the adjustment of the position of the centrifugal block 209 and increasing the application range of the coating device. When it is necessary to change the adhesive type or clean the adhesive storage box 305, the pull rod 310 can be pulled away from the connecting rod 309, and then the connecting rod 309 can be pressed into the placement groove 307.The connecting rod 309 compresses the second return spring 308, allowing the glue storage box 305 to be removed for replacement. Similarly, the return of the second return spring 308 causes the connecting rod 309 to pass through the connecting frame, and the pull rod 310 is inserted into the connecting rod 309, thus fixing the position of the glue storage box 305. This facilitates product changeover and cleaning of the coating device. The second hydraulic cylinder 301 moves the support frame and coating frame 303, allowing the coating head 304 to connect with the transmission... When the moving rollers 109 are adjusted to a suitable spacing, during the discharge of exhaust gas in the drying process, the exhaust gas in the cover plate 102 first passes through the lower water storage box 402 and comes into contact with the hot-end heat exchanger, heating the hot-end heat exchanger. Meanwhile, the cold-end heat exchanger 406 is in contact with air at its top, where the temperature is lower. The temperature difference between the two ends gradually increases, and the exhaust gas near the hot-end heat exchanger 403 begins to expand due to heat. Then, the exhaust gas slowly passes through the wet plate stack 404 and the upper water storage layer, and is discharged from the cold-end heat exchanger 406. At this time, the upper water storage... Water within the layer permeates the surface of the wet plate stack 404 through capillary cores. The lower end of the wet plate stack 404 has a higher temperature, causing water evaporation and heat absorption, while the upper end has a lower temperature, causing water vapor condensation and heat release. This accelerates the temperature difference change. When the temperature difference reaches the critical value for self-excited oscillation of the resonant tube 401, the thermal expansion and contraction of the exhaust gas generates stable sound waves through the thermoacoustic effect. These sound waves reflect back and forth within the resonant tube 401, forming standing waves. Near the node of the standing wave oscillation, the exhaust gas flows in a fixed direction, forming an acoustic flow, thus completing the process. The system discharges exhaust gas, while the lower water storage box 402 collects dripping water. Both the upper and lower water storage boxes 405 and 402 can supply water to or from the water storage tank 408 via the water pipe 407. The exhaust flow rate is determined by the sound pressure amplitude. When the temperature inside the cover plate 102 rises or the exhaust gas volume increases, the temperature at the hot-end heat exchanger 403 rises, the temperature difference increases, the sound pressure intensifies, and the exhaust flow rate automatically increases. Without the aid of moving parts, the system utilizes waste heat to achieve adaptive exhaust gas discharge, resulting in low energy consumption.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A functional PET film processing coating device comprising a machine body (1), characterized in that: The machine body (1) includes a base frame (101), a cover plate (102) is installed on the top of the base frame (101), and an unwinding frame (104) and a winding frame (105) are respectively installed on both sides of the outer surface of the base frame (101). A tension buffer mechanism (2) and a coating mechanism (3) are provided on the inner side of the unwinding frame (104), and an exhaust mechanism (4) is provided on the top of the cover plate (102). The take-up frame (105) is rotatably connected to a take-up roller (106), and the unwinding frame (104) is rotatably connected to an unwinding roller (107). A first motor (108) is mounted on one end of the outer surface of both the take-up roller (106) and the unwinding roller (107). A transmission roller (109) is rotatably connected to the inner sides of the base frame (101), the unwinding frame (104), and the take-up frame (105). The tension buffer mechanism (2) includes a fixed plate (201), which is fixedly installed on the inner side of the unwinding frame (104). A ball bearing (202) is rotatably connected to the inner side of the fixed plate (201). A rotating shaft (203) is fixedly installed on one side of the outer surface. A movable plate (206) is slidably connected to the inner side of the rotating shaft (203). A guide roller (208) is rotatably connected to the inner side of the movable plate (206). A centrifugal block (209) is slidably connected to one side of the outer surface of the movable plate (206). A telescopic rod (210) is installed on one side of the outer surface of the centrifugal block (209). A storage groove (211) is opened on both sides of the outer surface of the centrifugal block (209). A first return spring (212) is fixedly installed at one end of the inner surface of the storage groove (211). A locking block (213) is fixedly installed at one end of the outer surface of the first return spring (212).

2. The coating apparatus for processing functional PET films according to claim 1, characterized in that: A first hydraulic cylinder (103) is installed on one side of the outer surface of the base frame (101). The output end of the first hydraulic cylinder (103) is connected to one side of the outer surface of the cover plate (102). Curing lamps (110) are installed at the bottom end of the cover plate (102) and the top end of the base frame (101).

3. The coating apparatus for processing functional PET films according to claim 1, characterized in that: The top of the base frame (101) is provided with a feeder (111). The feeder (111) includes a second motor, a gear and a toothed chain. The second motor is installed on one side of the outer surface of the base frame (101). A gear is fixedly installed on one end of the surface of the transmission roller (109) located at the top of the base frame (101). The outer surface of the gear is meshed with a toothed chain. The outer surface of one set of gears is connected to the output end of the second motor.

4. The coating apparatus for processing functional PET films according to claim 1, characterized in that: Both ends of the outer surface of the rotating shaft (203) are fixedly installed with torsion springs (204). The other end of the outer surface of the torsion springs (204) is fixedly installed on the outer surface of the fixing plate (201). A limit rod (205) is fixedly installed on one side of the outer surface of the fixing plate (201). The limit rods (205) are symmetrically distributed on both sides of the outer surface of the rotating shaft (203). Two sets of movable plates (206) are respectively installed at both ends of the rotating shaft (203) near the ball bearings (202). The outer surfaces of the movable plates (206) and the rotating shaft (203) are provided with mounting holes. The inner side of the mounting holes is rotatably connected with a fixing bolt (207).

5. The coating apparatus for processing functional PET films according to claim 1, characterized in that: The telescopic rod (210) is installed on the inner side of the movable plate (206). A plug rod (214) is fixedly installed on one side of the outer surface of the locking block (213). Slots (215) are provided on both sides of the outer surface of the movable plate (206). The plug rod (214) is inserted into the inner side of the slot (215).

6. The coating apparatus for processing functional PET films according to claim 1, characterized in that: The coating mechanism (3) includes a second hydraulic cylinder (301), which is installed on both sides of the inner surface of the unwinding frame (104). A support plate (302) is installed at the output end of the second hydraulic cylinder (301). A coating frame (303) is rotatably connected to one side of the outer surface of the support plate (302). A coating head (304) and a glue storage box (305) are installed on the surface of the coating frame (303). The bottom end of the coating head (304) is connected to the top end of the glue storage box (305). Fixing blocks (306) are fixedly installed on both sides of the outer surface of the coating frame (303).

7. The coating apparatus for processing functional PET films according to claim 6, characterized in that: The glue storage box (305) has placement slots (307) on both sides of its outer surface. A second return spring (308) is fixedly installed on one end of the inner surface of the placement slot (307). A connecting rod (309) is fixedly installed on one end of the outer surface of the second return spring (308). The connecting rod (309) is slidably connected to the inner side of the placement slot (307). A pull rod (310) is slidably connected to the inner side of both the fixing block (306) and the connecting rod (309).

8. The coating apparatus for processing functional PET films according to claim 1, characterized in that: The exhaust mechanism (4) includes a resonant tube (401), which is fixedly installed on the inner side of the cover plate (102). A lower water storage box (402) is installed at the bottom of the inner side of the resonant tube (401). A hot end heat exchanger (403) is provided at the top of the lower water storage box (402). A wet plate stack (404) is provided at the top of the hot end heat exchanger (403). An upper water storage box (405) is provided at the top of the wet plate stack (404). A capillary core is connected to both the bottom of the upper water storage box (405) and the top of the wet plate stack (404).

9. The coating apparatus for processing functional PET films according to claim 8, characterized in that: A cold-end heat exchanger (406) is provided at the top of the upper water storage box (405). Both the cold-end heat exchanger (406) and the hot-end heat exchanger (403) are needle-fin heat exchangers. A water supply pipe (407) is fixedly installed on one side of the outer surface of the lower water storage box (402) and the upper water storage box (405). A water storage tank (408) is installed at the other end of the outer surface of the water supply pipe (407). The water storage tank (408) is installed at the top of the cover plate (102).

Images