Uniformity-adjustable coating device for polymer release film

Abstract

The application discloses a kind of evenness adjustable coating device for polymer release film, it is related to liquid coating technical field, when coating device works, polymer release film is unwound by unwinding module and is guided, in turn pass the top of coating roller and comma roller and drying module, finally by winding module winding collection, drying module is responsible for the polymer release film that coating is completed to carry out drying setting treatment, in coating module coating process, stirring mechanism continuously stirs coating in storage tank, while driving defoaming mechanism to operate, prevent bubble from adhering on polymer release film in coating process, coating roller removes coating from storage tank, under the action of coating auxiliary mechanism, to the part of coating roller local over or insufficient part is removed or made up, evenness adjusting mechanism is adaptively adjusted according to pressure condition, adjust the size of local roll gap of comma roller and polymer release film, further guarantee the evenness of polymer release film surface coating.

Description

Technical Field

[0001] This invention relates to the field of liquid coating technology, specifically to a uniformly adjustable coating apparatus for polymer release films. Background Technology

[0002] Coating machines are widely used to uniformly coat coatings, adhesives, or other functional materials onto substrate surfaces. Polymer release films can be given specific functions through coating surface treatment to meet the needs of different industrial scenarios. In recent years, with the diversification of industrial demands, the requirements for coating uniformity and adhesion have become increasingly stringent, driving continuous innovation and development in coating technology.

[0003] Most coating machines on the market currently cannot adjust the uniformity of the coating process. During coating, some areas of the polymer release film may have excessive or insufficient coating. Traditional coating machines can remove the excess coating, but they cannot compensate for the insufficient coating, resulting in uneven coating thickness on the surface of the polymer release film and affecting its subsequent performance. Furthermore, due to prolonged use, the comma tip of the comma roller is prone to wear, causing changes in the gap between the comma roller and the coating roller, further affecting the uniformity of the coating and leading to unstable coating quality of the polymer release film. Summary of the Invention

[0004] The purpose of this invention is to provide a uniformly adjustable coating apparatus for polymer release films to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The coating device includes an unwinding module, a coating module, a drying module, a rewinding module, and a base. The unwinding module, coating module, drying module, and rewinding module are sequentially installed on the base. The coating module includes a coating roller, a uniformity adjustment mechanism, a storage tank, a stirring mechanism, a defoaming mechanism, a coating auxiliary mechanism, and a comma roller. The two ends of the coating roller are rotatably connected to the base. The comma roller has a through groove along its long axis at the comma tip. The uniformity adjustment mechanism is installed in the through groove. The comma roller is located on the side of the coating roller closer to the drying module. The two ends of the comma roller are fixedly connected to the base. The coating auxiliary mechanism is installed between the coating roller and the comma roller. The two ends of the coating auxiliary mechanism are rotatably connected to the base. The storage tank is located below the coating roller, the uniformity adjustment mechanism, and the coating auxiliary mechanism. The storage tank is fixedly connected to the base. The bottom ends of the coating roller and the coating auxiliary mechanism are immersed in the coating in the storage tank. The stirring mechanism is installed in the storage tank. The defoaming mechanism is located on the side of the stirring mechanism closer to the coating roller. The defoaming mechanism is installed in the storage tank.

[0007] An external control panel is installed outside the coating unit. This panel controls the uniformity adjustment mechanism. During operation, the polymer release film is unwound and guided by the unwinding module, passing sequentially above the coating roller and the comma roller, and then through the drying module, before finally being collected by the rewinding module. The drying module is responsible for drying and shaping the coated polymer release film. During the coating process, the stirring mechanism continuously stirs the coating material in the storage tank to ensure uniform composition. Simultaneously, the stirring process activates the defoaming mechanism to prevent air bubbles from adhering to the polymer release film during coating, affecting coating uniformity and the quality of the final product. The coating roller carries the coating material from the storage tank. As it passes through the coating auxiliary mechanism, the auxiliary mechanism removes or replenishes any excess or insufficient coating material on the coating roller, ensuring a more uniform coating on the polymer release film. The uniformity adjustment mechanism adaptively adjusts according to pressure conditions, changing the size of the gap between the comma roller and the polymer release film to further guarantee the uniformity of the coating on the polymer release film surface. The external control console can receive feedback signals from the uniformity adjustment mechanism in real time and precisely control the adjustment process according to preset parameters.

[0008] Furthermore, multiple uniformity adjustment mechanisms are equidistantly arranged along the long axis within the through groove of the comma roller. Each uniformity adjustment mechanism includes an adjustment cylinder and a power supply. Both the adjustment cylinder and the power supply are fixedly installed within the through groove of the comma roller. The output end of the adjustment cylinder is fixedly connected to the top surface of the through groove, and the power supply and the adjustment cylinder are electrically connected.

[0009] Multiple uniformity adjustment mechanisms allow for more precise adjustment of the coating on different parts of the polymer release film. Power is supplied by an adjusting electric cylinder. When the cylinder extends and retracts, the gap between the comma roller and the polymer release film within the corresponding area can be adjusted to narrow or widen, specifically correcting areas of uneven coating on the polymer release film surface and ensuring a uniform coating thickness across the entire surface.

[0010] Furthermore, a slider is provided at the top of the output end of the adjusting electric cylinder, and the slider is slidably connected to the output end of the adjusting electric cylinder. A limit groove is provided at the top of the output end of the adjusting electric cylinder, which limits the sliding distance of the slider. A protrusion is also provided on the output end of the adjusting electric cylinder, and the protrusion is located below the limit groove.

[0011] When adjusting the extension and retraction of the electric cylinder, the slider can slide within the limit groove.

[0012] Furthermore, the uniformity adjustment mechanism also includes a piezoresistor and a detection circuit board. The piezoresistor is installed between the slider and the protrusion, and its upper and lower ends are respectively connected to the slider and the protrusion. The piezoresistor, the detection circuit board, and the power supply are electrically connected. The detection circuit board is fixedly installed in the through groove of the comma roller.

[0013] Under the action of the varistor, the slider is stuck and cannot slide. The protrusion supports the varistor. When the coating passes through the comma roller, the comma tip of the comma roller is pressed, causing the slider to press against the varistor. After being subjected to pressure, the resistance value of the varistor changes accordingly. The detection circuit board captures this change and converts it into an electrical signal, which is transmitted to the external control panel. The external control panel receives the signal, analyzes it, and determines whether the comma tip of the comma roller is worn based on the pressure condition. If wear is detected, the external control panel sends a command to the adjusting cylinder. The output end of the adjusting cylinder extends, pushing up the worn part of the comma tip of the comma roller until the resistance value of the varistor reaches the preset range, at which point the adjusting cylinder stops working. This maintains the uniformity of the comma tip of the comma roller and the direct roller gap between the polymer release film, effectively avoiding uneven coating caused by comma roller wear.

[0014] Furthermore, the mixing mechanism includes a mixing motor and a mixing assembly. The mixing motor is fixedly installed on the outside of the storage tank. The output end of the mixing motor passes through the storage tank and is fixedly connected to one end of the mixing assembly. The mixing assembly is set inside the storage tank, and the mixing direction of the mixing assembly is opposite to the rotation direction of the coating roller.

[0015] After the stirring motor starts, it drives the stirring components to stir in the storage tank, preventing the paint from settling at the bottom of the storage tank. This ensures that the composition of the paint in the storage tank is evenly distributed, guaranteeing that the paint composition carried by the coating roller is stable and of reliable quality.

[0016] Furthermore, the stirring mechanism also includes a placement plate, one end of which is rotatably connected to the top of the stirring blades of the stirring mechanism, and a positive magnet is provided on the side of the placement plate facing the defoaming mechanism.

[0017] The placement plate is used to adjust the angle between the positive magnet and the stirring blade, thereby changing the movement amplitude of the defoaming mechanism. Different angles between the placement plate and the stirring blade are set according to the defoaming requirements of different concentrations of coatings.

[0018] Furthermore, the defoaming mechanism includes a reset spring and a defoaming plate. The defoaming plate is located on the side of the mixing mechanism near the coating roller. One end of the defoaming plate is hinged to the storage box, one end of the reset spring is fixedly connected to the storage box, and the other end of the reset spring is fixedly connected to the upper end face of the defoaming plate. A reverse magnet is installed on the lower end face of the defoaming plate. When the reverse magnet and the forward magnet face each other, the reverse magnet and the forward magnet repel each other.

[0019] Defoaming pins are installed on the lower surface of the defoaming plate for defoaming. When the stirring motor drives the stirring assembly to rotate, the placement plate rotates synchronously with the stirring blades. When the positive and negative magnets approach a preset distance, the repulsive force between them pushes the defoaming plate to rotate around the hinge point. The return spring is compressed after the defoaming plate rotates; when the positive magnet moves away, the return spring rebounds, pushing the defoaming plate back to its original position, forming a reciprocating motion. By adjusting the angle between the placement plate and the stirring blades, the range and angle of the positive magnet's magnetic field can be changed, thereby controlling the swing amplitude of the defoaming plate. When the paint viscosity is high, increasing the angle increases the swing amplitude of the defoaming plate, enhancing the defoaming effect; when the paint viscosity is low, decreasing the angle limits the movement range of the defoaming plate, preventing excessive stirring and paint splashing. Simultaneously, this magnetically driven structure requires no additional power source, and the defoaming action is synchronized with the stirring process, ensuring that the paint is always in a bubble-free state before application. In addition, the defoaming board also plays a certain guiding role, directing the defoamed paint to the coating roller, so that the coating roller can obtain the foam-free paint more smoothly.

[0020] Furthermore, the defoaming plate has multiple through holes arranged in an array, and a rotating plate is set in each through hole. The rotating plate is rotatably connected to the defoaming plate in the through hole. The rotation angle range of the rotating plate is 0°~60°. The rotating plate is parallel to the defoaming plate in the initial state.

[0021] When the return spring is compressed, the rotating plate inside the through hole rotates under pressure, increasing the flow area of ​​the through hole and reducing the resistance during rotation. When the return spring rebounds, the rotating plate inside the through hole rotates under pressure and returns to its original position, reducing the flow area of ​​the through hole and decreasing the reset speed of the rotating plate. This prevents the reverse magnet and the forward magnet from repelling each other rapidly due to excessive speed, which would cause large vibrations in the whole device, affecting the overall service life of the device and the uniformity of the coating.

[0022] Furthermore, the coating auxiliary mechanism includes a feeding roller, a replenishing roller, a de-coating roller, and a scraper. The feeding roller, replenishing roller, and de-coating roller are all rotatably connected to the base. The feeding roller, replenishing roller, and de-coating roller are located between the coating roller and the comma roller. The feeding roller, replenishing roller, and de-coating roller are designed in sequence. The replenishing roller is located above the de-coating roller. The roller gap between the replenishing roller and the comma roller is equal in size to the roller gap between the de-coating roller and the comma roller. The feeding roller and the replenishing roller are tangent. The scraper is located between the de-coating roller and the comma roller. The scraper is tangent to the de-coating roller.

[0023] During rotation, the feeding roller carries the paint from the storage tank to the replenishing roller. As the replenishing roller rotates, it replenishes the paint on the coating roller to ensure that every part of the polymer release film has sufficient paint coverage. The removing roller performs initial control of the paint thickness, removing excess paint in certain areas to prevent paint accumulation from affecting the uniformity of coating and the quality of the final product, and reducing the working pressure of the subsequent comma roller. The scraper scrapes the paint carried away from the coating roller by the removing roller, preventing the paint carried away from the coating roller from being transported back to the coating roller with the rotation of the removing roller, which would affect the uniformity of coating.

[0024] Furthermore, the coating roller, feeding roller, replenishing roller, and de-feeding roller rotate in the same direction, while the rotation direction of the coating roller is opposite to the conveying direction of the release film. The conveying direction of the release film is from the unwinding module, through the coating module and the drying module, to the rewinding module.

[0025] This reverse rotation design allows the coating to be more fully squeezed and spread when the coating roller comes into contact with the release film.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The coating auxiliary mechanism of the present invention removes or replenishes the portion of coating material that is locally excessive or insufficient on the coating roller, so that the coating material is applied more evenly on the polymer release film;

[0028] 2. The uniformity adjustment mechanism of the present invention adaptively adjusts according to the pressure conditions, adjusts the size of the local roller gap between the comma roller and the polymer release film, compensates for the partial roller gap change caused by wear of the comma roller, and further ensures the uniformity of the coating on the surface of the polymer release film.

[0029] 3. The defoaming mechanism of the present invention does not require an additional power source. It operates together with the stirring mechanism and also plays a guiding role, directing the defoamed coating to the coating roller, so that the coating roller can obtain the foam-free coating more smoothly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the coating module of the present invention;

[0032] Figure 3 This is a cross-sectional structural diagram of the coating module of the present invention;

[0033] Figure 4 This is a schematic diagram of another cross-sectional structure of the coating module of the present invention;

[0034] Figure 5This is a schematic cross-sectional view of the coating roller of the present invention;

[0035] Figure 6 This is a partial structural schematic diagram of the defoaming mechanism of the present invention;

[0036] Figure 7 for Figure 3 A magnified view of part A;

[0037] Figure 8 for Figure 5 A magnified schematic diagram of part B.

[0038] In the diagram: 1. Unwinding module; 2. Coating module; 3. Drying module; 4. Rewinding module; 5. Base; 21. Coating roller; 22. Uniformity adjustment mechanism; 23. Storage bin; 24. Stirring mechanism; 25. Defoaming mechanism; 26. Coating auxiliary mechanism; 27. Comma roller; 221. Adjusting cylinder; 222. Power supply; 223. Slider; 224. Limiting groove; 225. Protrusion; 226. Varistor; 227. Detection circuit board; 241. Stirring motor; 242. Stirring assembly; 243. Placement plate; 244. Positive magnet; 251. Reset spring; 252. Defoaming plate; 253. Reverse magnet; 254. Through hole; 255. Rotating plate; 261. Feeding roller; 262. Replenishing roller; 263. Removing roller; 264. Scraper. Detailed Implementation

[0039] 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.

[0040] Example: Figure 1 - Figure 8 As shown, the present invention provides a technical solution for a uniformly adjustable coating device for polymer release films:

[0041] like Figures 1 to 3 and Figure 5As shown, the coating device includes an unwinding module 1, a coating module 2, a drying module 3, a rewinding module 4, and a base 5. The unwinding module 1, coating module 2, drying module 3, and rewinding module 4 are sequentially mounted on the base 5. The coating module 2 includes a coating roller 21, a uniformity adjustment mechanism 22, a storage tank 23, a stirring mechanism 24, a defoaming mechanism 25, a coating auxiliary mechanism 26, and a comma roller 27. The two ends of the coating roller 21 are rotatably connected to the base 5. A through groove is provided at the comma tip of the comma roller 27 along its long axis. The uniformity adjustment mechanism 22 is installed in the through groove. The comma roller 27 is located near the drying module of the coating roller 21. On one side of 3, the two ends of the comma roller 27 are fixedly connected to the base 5. The coating auxiliary mechanism 26 is installed between the coating roller 21 and the comma roller 27. The two ends of the coating auxiliary mechanism 26 are rotatably connected to the base 5. The storage tank 23 is located below the coating roller 21, the uniformity adjustment mechanism 22 and the coating auxiliary mechanism 26. The storage tank 23 is fixedly connected to the base 5. The bottom ends of the coating roller 21 and the coating auxiliary mechanism 26 are immersed in the coating in the storage tank 23. The stirring mechanism 24 is installed in the storage tank 23. The defoaming mechanism 25 is located on the side of the stirring mechanism 24 near the coating roller 21. The defoaming mechanism 25 is installed in the storage tank 23.

[0042] An external control panel is installed outside the coating device. This panel controls the uniformity adjustment mechanism 22. During operation, the polymer release film is unwound and guided by the unwinding module 1, passing sequentially above the coating roller 21 and the comma roller 27, and then through the drying module 3, before being collected by the rewinding module 4. The drying module 3 is responsible for drying and shaping the coated polymer release film. During the coating process in the coating module 2, the stirring mechanism 24 continuously stirs the coating material in the storage tank 23 to ensure uniform coating composition. Simultaneously, the stirring process activates the defoaming mechanism 25 to prevent air bubbles from adhering to the polymer release film during coating, thus affecting coating uniformity and the quality of the final product. The coating roller 21 carries the coating material from the storage tank 23. As it passes through the coating auxiliary mechanism 26, the mechanism removes or replenishes any excess or insufficient coating material on the coating roller 21, ensuring a more uniform coating application onto the polymer release film. The uniformity adjustment mechanism 22 adaptively adjusts according to the pressure conditions, adjusting the local roller gap size between the comma roller 27 and the polymer release film to further ensure the uniformity of the coating on the surface of the polymer release film. The external control console can receive feedback signals from the uniformity adjustment mechanism 22 in real time and precisely control the adjustment process according to preset parameters.

[0043] like Figure 5As shown, multiple uniformity adjustment mechanisms 22 are arranged equidistantly along the long axis in the through groove of the comma roller 27. The uniformity adjustment mechanism 22 includes an adjustment cylinder 221 and a power supply 222. The adjustment cylinder 221 and the power supply 222 are both fixedly installed in the through groove of the comma roller 27. The output end of the adjustment cylinder 221 is fixedly connected to the top surface of the through groove. The power supply 222 and the adjustment cylinder 221 are electrically connected.

[0044] Multiple uniformity adjustment mechanisms 22 enable more precise adjustment of the coating conditions at different locations on the polymer release film. Power supply 222 powers the adjustment cylinder 221. When the adjustment cylinder 221 extends or retracts, it can adjust the gap between the comma roller 27 and the polymer release film within the corresponding area, specifically correcting areas of uneven coating on the polymer release film surface and ensuring a uniform coating thickness across the entire polymer release film surface.

[0045] like Figure 8 As shown, a slider 223 is provided at the top of the output end of the adjusting electric cylinder 221. The slider 223 and the output end of the adjusting electric cylinder 221 are slidably connected. A limit groove 224 is provided at the top of the output end of the adjusting electric cylinder 221. The limit groove 224 limits the sliding distance of the slider 223. A protrusion 225 is also provided on the output end of the adjusting electric cylinder 221. The protrusion 225 is located below the limit groove 224.

[0046] When the electric cylinder 221 extends or retracts, the slider 223 can slide within the limit groove 224.

[0047] like Figure 8 As shown, the uniformity adjustment mechanism 22 also includes a pressure-sensitive resistor 226 and a detection circuit board 227. The pressure-sensitive resistor 226 is installed between the slider 223 and the protrusion 225. The upper and lower end faces of the pressure-sensitive resistor 226 are respectively connected to the slider 223 and the protrusion 225. The pressure-sensitive resistor 226, the detection circuit board 227 and the power supply 222 are electrically connected. The detection circuit board 227 is fixedly installed in the through groove of the comma roller 27.

[0048] Under the action of the varistor 226, the slider 223 is stuck and cannot slide. The protrusion 225 supports the varistor 226. When the coating passes through the comma roller 27, the comma tip of the comma roller 27 is pressed, causing the slider 223 to press against the varistor 226. After the varistor 226 is subjected to pressure, its resistance value will change accordingly. The detection circuit board 227 captures this change and converts it into an electrical signal, which is transmitted to the external control panel. The external control panel receives the signal, analyzes and processes it, and determines whether the comma tip of the comma roller is worn based on the pressure condition. If wear is determined, the external control panel sends a command to the adjusting cylinder 221. The output end of the adjusting cylinder 221 extends, pushing up the comma tip of the worn part of the comma roller until the resistance value of the varistor 226 reaches the preset range, and the adjusting cylinder 221 stops working. This maintains the uniformity of the comma tip of the comma roller and the direct roller gap of the polymer release film, effectively avoiding the problem of uneven coating caused by comma roller wear.

[0049] like Figures 2 to 4 As shown, the stirring mechanism 24 includes a stirring motor 241 and a stirring assembly 242. The stirring motor 241 is fixedly installed on the outside of the storage tank 23. The output end of the stirring motor 241 passes through the storage tank 23 and is fixedly connected to one end of the stirring assembly 242. The stirring assembly 242 is arranged inside the storage tank 23. The stirring direction of the stirring assembly 242 is opposite to the rotation direction of the coating roller 21.

[0050] After the stirring motor 241 starts, it drives the stirring component 242 to stir in the storage tank 23, preventing the paint from settling at the bottom of the storage tank 23, so that the composition of the paint in the storage tank 23 is evenly distributed, ensuring that the paint composition carried by the coating roller 21 is stable and of reliable quality.

[0051] like Figure 3 and Figure 4 As shown, the stirring mechanism 24 also includes a placement plate 243. One end of the placement plate 243 is rotatably connected to the top of the stirring blade of the stirring mechanism 24. A positive magnet 244 is provided on the side of the placement plate 243 facing the defoaming mechanism 25.

[0052] The placement plate 243 is used to adjust the angle between the positive magnet 244 and the stirring blade, thereby changing the movement amplitude of the defoaming mechanism 25. Different angles between the placement plate 243 and the stirring blade are set according to the defoaming requirements of different concentrations of coatings.

[0053] like Figure 3 , Figure 4 and Figure 6As shown, the defoaming mechanism 25 includes a return spring 251 and a defoaming plate 252. The defoaming plate 252 is located on the side of the stirring mechanism 24 near the coating roller 21. One end of the defoaming plate 252 is hinged to the storage box 23. One end of the return spring 251 is fixedly connected to the storage box 23. The other end of the return spring 251 is fixedly connected to the upper end face of the defoaming plate 252. A reverse magnet 253 is installed on the lower end face of the defoaming plate 252. When the reverse magnet 253 and the positive magnet 244 face each other, the reverse magnet 253 and the positive magnet 244 repel each other.

[0054] Defoaming pins are provided on the lower end face of the defoaming plate 252 for defoaming. When the stirring motor 241 drives the stirring assembly 242 to rotate, the placement plate 243 rotates synchronously with the stirring blades. When the positive magnet 244 and the negative magnet 253 approach a preset distance, the repulsive force between them pushes the defoaming plate 252 to rotate around the hinge point. The return spring 251 is compressed after the defoaming plate 252 rotates. When the positive magnet 244 moves away, the return spring 251 rebounds, pushing the defoaming plate 252 back to its original position, forming a reciprocating motion. By adjusting the angle between the placement plate 243 and the stirring blades, the range and angle of the magnetic field of the positive magnet 244 can be changed, thereby controlling the swing amplitude of the defoaming plate 252. When the paint viscosity is high, increasing the angle increases the swing amplitude of the defoaming plate 252, enhancing the defoaming effect; when the paint viscosity is low, decreasing the angle limits the range of motion of the defoaming plate 252, avoiding excessive stirring that could cause paint splashing. Meanwhile, this magnetically driven structure requires no additional power source, and the defoaming action is synchronized with the stirring process, ensuring that the coating is always in a bubble-free state before application. In addition, the defoaming plate 252 also plays a certain guiding role, directing the defoamed coating to the coating roller 21, so that the coating roller 21 can more smoothly obtain the bubble-free coating.

[0055] like Figure 6 As shown, the defoaming plate 252 has multiple through holes 254 arranged in an array. A rotating plate 255 is provided in each through hole 254. The rotating plate 255 is rotatably connected to the defoaming plate 252 in the through hole 254. The rotation angle range of the rotating plate 255 is 0°~60°. In the initial state, the rotating plate 255 is parallel to the defoaming plate 252.

[0056] When the return spring 251 is compressed, the rotating plate 255 inside the through hole 254 rotates under pressure, increasing the flow area of ​​the through hole 254 and reducing the resistance during rotation. When the return spring 251 rebounds, the rotating plate 255 inside the through hole 254 rotates under pressure and returns to its original position, reducing the flow area of ​​the through hole 254 and decreasing the reset speed of the rotating plate 255. This prevents the reverse magnet 253 and the forward magnet 244 from repelling each other rapidly after the speed is too fast, which would cause the entire device to vibrate significantly, affecting the overall service life of the device and the uniformity of the coating.

[0057] like Figure 7 As shown, the coating auxiliary mechanism 26 includes a feeding roller 261, a replenishing roller 262, a de-coating roller 263, and a scraper 264. The feeding roller 261, the replenishing roller 262, and the de-coating roller 263 are all rotatably connected to the base 5. The feeding roller 261, the replenishing roller 262, and the de-coating roller 263 are located between the coating roller 21 and the comma roller 27. The feeding roller 261, the replenishing roller 262, and the de-coating roller 263 are designed in sequence. The replenishing roller 262 is located above the de-coating roller 263. The roller gap between the replenishing roller 262 and the comma roller 27 and the roller gap between the de-coating roller 263 and the comma roller 27 are of equal size. The feeding roller 261 and the replenishing roller 262 are tangent. The scraper 264 is located between the de-coating roller 263 and the comma roller 27. The scraper 264 and the de-coating roller 263 are tangent.

[0058] During rotation, the feeding roller 261 carries the coating material in the storage box 23 and transfers it to the replenishing roller 262. During rotation, the replenishing roller 262 replenishes the coating material on the coating roller 21 to ensure that every part of the polymer release film is covered with sufficient coating material. The removing roller 263 performs initial adjustment of the coating material thickness and removes excess coating material in the area to avoid affecting the uniformity of coating and the quality of the final product due to coating material accumulation, and reduces the working pressure of the subsequent comma roller 27. The scraper 264 scrapes the coating material carried away from the coating roller 21 by the removing roller 263 to prevent the carried-away coating material from being transported back to the coating roller 21 with the rotation of the removing roller 263, which would affect the uniformity of coating.

[0059] like Figure 7 As shown, the coating roller 21, feeding roller 261, replenishing roller 262 and de-feeding roller 263 rotate in the same direction. The rotation direction of the coating roller 21 is opposite to the conveying direction of the release film. The conveying direction of the release film is from the unwinding module 1 through the coating module 2 and the drying module 3 to the winding module 4.

[0060] The coating roller 21, feeding roller 261, replenishing roller 262 and de-feeding roller 263 are all driven by motors. This design of opposite rotation directions allows the coating to be more fully squeezed and coated when the coating roller 21 comes into contact with the release film.

[0061] The working principle of this invention is as follows: An external control panel is provided outside the coating device. The external control panel controls the uniformity adjustment mechanism 22. When the coating device is working, the polymer release film is unwound and guided by the unwinding module 1, passing sequentially above the coating roller 21 and the comma roller 27 and the drying module 3, and finally being collected by the winding module 4. The drying module 3 is responsible for drying and shaping the coated polymer release film. During the coating process in the coating module 2, the stirring mechanism 24 continuously stirs the coating in the storage tank 23 to ensure uniform coating composition. At the same time, the stirring process drives the defoaming mechanism 25 to operate, preventing air bubbles from adhering to the polymer release film during the coating process, affecting the coating uniformity and the quality of the final product. The coating roller 21 carries the coating away from the storage tank 23. When passing through the coating auxiliary mechanism 26, the coating auxiliary mechanism 26 removes or supplements any excess or insufficient coating on the coating roller 21, making the coating more uniform on the polymer release film. The uniformity adjustment mechanism 22 adaptively adjusts according to the pressure conditions, adjusting the local roller gap size between the comma roller 27 and the polymer release film to further ensure the uniformity of the coating on the surface of the polymer release film. The external control console can receive feedback signals from the uniformity adjustment mechanism 22 in real time and precisely control the adjustment process according to preset parameters.

[0062] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 uniformly adjustable coating apparatus for polymer release films, characterized in that: The coating device includes an unwinding module (1), a coating module (2), a drying module (3), a rewinding module (4), and a base (5). The unwinding module (1), coating module (2), drying module (3), and rewinding module (4) are sequentially installed on the base (5). The coating module (2) includes a coating roller (21), a uniformity adjustment mechanism (22), a storage tank (23), a stirring mechanism (24), a defoaming mechanism (25), a coating auxiliary mechanism (26), and a comma roller (27). The two ends of the coating roller (21) are rotatably connected to the base (5). The comma roller (27) has a through groove along its long axis at the comma tip. The uniformity adjustment mechanism (22) is installed in the through groove. The comma roller (27) is located near the drying module (3) of the coating roller (21). On one side, the two ends of the comma roller (27) are fixedly connected to the base (5), the coating auxiliary mechanism (26) is installed between the coating roller (21) and the comma roller (27), the two ends of the coating auxiliary mechanism (26) are rotatably connected to the base (5), the storage box (23) is located below the coating roller (21), the uniformity adjustment mechanism (22) and the coating auxiliary mechanism (26), the storage box (23) is fixedly connected to the base (5), the bottom ends of the coating roller (21) and the coating auxiliary mechanism (26) are immersed in the coating in the storage box (23), the stirring mechanism (24) is installed in the storage box (23), the defoaming mechanism (25) is located on the side of the stirring mechanism (24) close to the coating roller (21), the defoaming mechanism (25) is installed in the storage box (23); The uniformity adjustment mechanism (22) is arranged in multiple equidistant rows along the long axis in the through groove of the comma roller (27). The uniformity adjustment mechanism (22) includes an adjustment cylinder (221) and a power supply (222). The adjustment cylinder (221) and the power supply (222) are both fixedly installed in the through groove of the comma roller (27). The output end of the adjustment cylinder (221) is fixedly connected to the top surface of the through groove. The power supply (222) and the adjustment cylinder (221) are electrically connected.

2. The polymer release film uniformity adjustable coating device according to claim 1, characterized in that: The top of the output end of the regulating electric cylinder (221) is provided with a slider (223), the slider (223) and the output end of the regulating electric cylinder (221) are slidably connected, the top of the output end of the regulating electric cylinder (221) is provided with a limiting groove (224), the limiting groove (224) limits the sliding distance of the slider (223), and the output end of the regulating electric cylinder (221) is also provided with a protrusion (225), the protrusion (225) is located below the limiting groove (224).

3. The polymer release film uniformity adjustable coating device according to claim 2, characterized in that: The uniformity adjustment mechanism (22) further includes a pressure-sensitive resistor (226) and a detection circuit board (227). The pressure-sensitive resistor (226) is installed between the slider (223) and the protrusion (225). The upper and lower end faces of the pressure-sensitive resistor (226) are respectively connected to the slider (223) and the protrusion (225). The pressure-sensitive resistor (226), the detection circuit board (227) and the power supply (222) are electrically connected. The detection circuit board (227) is fixedly installed in the through groove of the comma roller (27).

4. The uniformly adjustable coating apparatus for polymer release films according to claim 1, characterized in that: The stirring mechanism (24) includes a stirring motor (241) and a stirring assembly (242). The stirring motor (241) is fixedly installed on the outside of the storage tank (23). The output end of the stirring motor (241) is inserted into the storage tank (23) and fixedly connected to one end of the stirring assembly (242). The stirring assembly (242) is set inside the storage tank (23). The stirring direction of the stirring assembly (242) is opposite to the rotation direction of the coating roller (21).

5. The polymer release film uniformity adjustable coating device according to claim 4, characterized in that: The stirring mechanism (24) also includes a placement plate (243), one end of which is rotatably connected to the top of the stirring blade of the stirring mechanism (24), and a positive magnet (244) is provided on the side of the placement plate (243) facing the defoaming mechanism (25).

6. The polymer release film uniformity adjustable coating device according to claim 5, characterized in that: The defoaming mechanism (25) includes a return spring (251) and a defoaming plate (252). The defoaming plate (252) is located on the side of the stirring mechanism (24) near the coating roller (21). One end of the defoaming plate (252) is hinged to the storage box (23). One end of the return spring (251) is fixedly connected to the storage box (23). The other end of the return spring (251) is fixedly connected to the upper end face of the defoaming plate (252). A reverse magnet (253) is installed on the lower end face of the defoaming plate (252). When the reverse magnet (253) and the positive magnet (244) face each other, the reverse magnet (253) and the positive magnet (244) repel each other.

7. The polymer release film uniformity adjustable coating device according to claim 6, characterized in that: The defoaming plate (252) has a plurality of through holes (254) arranged in an array. A rotating plate (255) is provided in each through hole (254). The rotating plate (255) is rotatably connected to the defoaming plate (252) in the through hole (254). The rotation angle of the rotating plate (255) is 0°~60°. The rotating plate (255) is initially parallel to the defoaming plate (252).

8. The uniformly adjustable coating apparatus for polymer release films according to claim 1, characterized in that: The coating auxiliary mechanism (26) includes a feeding roller (261), a replenishing roller (262), a de-coating roller (263), and a scraper (264). The feeding roller (261), the replenishing roller (262), and the de-coating roller (263) are all rotatably connected to the base (5). The feeding roller (261), the replenishing roller (262), and the de-coating roller (263) are located between the coating roller (21) and the comma roller (27). The rollers (263) are designed in sequence. The feeding roller (262) is located above the de-feeding roller (263). The roller gap between the feeding roller (262) and the comma roller (27) is the same size as the roller gap between the de-feeding roller (263) and the comma roller (27). The feeding roller (261) and the feeding roller (262) are tangent. The scraper (264) is located between the de-feeding roller (263) and the comma roller (27). The scraper (264) and the de-feeding roller (263) are tangent.

9. The polymer release film uniformity adjustable coating device according to claim 8, characterized in that: The coating roller (21), feeding roller (261), replenishing roller (262) and de-feeding roller (263) rotate in the same direction. The rotation direction of the coating roller (21) is opposite to the conveying direction of the polymer release film. The conveying direction of the polymer release film is from the unwinding module (1) through the coating module (2) and the drying module (3) to the winding module (4).

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