Coating device for micro gravure coating

Abstract

The utility model provides a coating device for micro gravure coating, which comprises a frame, a single-cantilever deviation-rectifying unwinding mechanism mounted on the frame, a first guide roller mounted on the right upper side of the single-cantilever deviation-rectifying unwinding mechanism, a tension adjusting swing roller mechanism mounted on the left upper side of the first guide roller, a second guide roller mounted on the right upper side of the tension adjusting swing roller mechanism, and a third guide roller mounted on the right upper side of the second guide roller. A lower micro-concave supporting roller mechanism and an upper micro-concave supporting roller mechanism which are arranged side by side up and down at intervals are installed above the second guide roller, the micro-concave plate coating roller mechanism is installed between the lower micro-concave supporting roller mechanism and the upper micro-concave supporting roller mechanism, and the adjustable micro-concave material groove mechanism is installed on the outer side of the micro-concave plate coating roller mechanism. Micro-concave material groove sealing scrapers are mounted at the upper and lower contact parts of a micro-concave material groove in the adjustable micro-concave material groove mechanism and a micro-concave plate coating roller in the micro-concave plate coating roller mechanism. According to the coating device, unwinding and deviation correction are combined on the same structure through the single-cantilever deviation correction unwinding mechanism, the structure is compact, the automation degree is high, and adjustability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a coating device for micro-gravure coating. Background Art

[0002] Micro gravure coating is a type of gravure coating. Micro gravure coating mainly uses the principles of capillary pressure and elastic fluid dynamics. A smaller diameter gravure roller is used. The surface of the gravure roller is engraved with patterns or grooves, such as square, diamond, triple spiral, trapezoid, etc. to provide a special coating amount. The gravure roller is installed on the bearing and partially immersed in the feed tray. The rotating shaft picks up the coating. After being quantitatively applied by a flexible steel scraper, the coating liquid is taken away by the reverse moving substrate to achieve uniform thin layer coating.

[0003] Compared with other coating methods, micro-gravure coating has incomparable advantages: thin coating, simple operation, and high coating uniformity. However, the existing micro-gravure coating equipment has a complex structure and poor adjustability. It requires the use of a complex unwinding mechanism and a deviation correction mechanism, which occupies a large area. The tension control of the film material mostly uses magnetic powder tension control, which has low tension accuracy and large tension fluctuations, resulting in insufficient coating accuracy, so it needs to be improved. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model proposes a coating device for micro-gravure coating, which combines unwinding and correction on the same structure by adopting a single-cantilever deviation correction unwinding mechanism, has a compact structure, is convenient for changing rolls, and has strong adjustability.

[0005] To achieve the above technical solution, the utility model provides a coating device for micro-gravure coating, comprising a frame, a single-cantilever deflection correction and unwinding mechanism is installed on the frame, a first guide roller is installed on the upper right of the single-cantilever deflection correction and unwinding mechanism, a tension adjustment swing roller mechanism is installed on the upper left of the first guide roller, a second guide roller is installed on the upper right of the tension adjustment swing roller mechanism, a lower micro-concave support roller mechanism and an upper micro-concave support roller mechanism arranged side by side and spaced apart are installed above the second guide roller, a micro-gravure coating roller mechanism is installed between the lower micro-concave support roller mechanism and the upper micro-concave support roller mechanism, an adjustable micro-concave material trough mechanism is installed on the outer side of the micro-gravure coating roller mechanism, micro-concave material trough closing scrapers are installed at the upper and lower contact points between the micro-concave material trough in the adjustable micro-concave material trough mechanism and the micro-gravure coating roller in the micro-gravure coating roller mechanism, and a coating lead-out roller is installed above the upper micro-concave support roller mechanism.

[0006] In the above technical scheme, during actual operation, the film roll to be coated is placed on a single-cantilever deflection correction and unwinding mechanism, which corrects the deflection while unwinding. The film is guided by the first guide roller and then enters the tension adjustment swing roller mechanism for tension adjustment. Then, it enters the coating area composed of a lower micro-concave support roller mechanism, an upper micro-concave support roller mechanism, a micro-gravure coating roller mechanism and an adjustable micro-concave material trough mechanism through the second guide roller. The coating in the micro-concave material trough is measured by the micro-concave coating roller in the micro-gravure coating roller mechanism and then coated on the surface of the film after being measured by a closed scraper in the micro-concave material trough, thereby achieving precise coating. Finally, it is led backwards through the coating lead-out roller.

[0007] Preferably, the micro-gravure coating roller mechanism comprises micro-gravure coating roller bearing seats mounted on the front and rear sides of the frame, the micro-gravure coating roller is mounted on the micro-gravure coating roller bearing seats, one end of the micro-gravure coating roller is connected to a reducer via a coupling, and the input shaft of the reducer is connected to a servo motor. In actual operation, the micro-gravure coating roller can be driven to rotate by the servo motor, and the micro-gravure coating roller transfers the coating in the micro-gravure material tank to the micro-gravure coating roller during the rotation process, and is coated on the surface of the film material after being metered by the micro-gravure material tank closed scraper.

[0008] Preferably, the adjustable micro-concave trough mechanism includes a micro-concave trough guide rail mounted on a frame, a micro-concave trough movable mounting seat mounted on the micro-concave trough guide rail, a micro-concave trough driving cylinder mounted on the frame and connected to the micro-concave trough movable mounting seat, the micro-concave trough is fixed on the micro-concave trough movable mounting seat through a micro-concave trough fixed shaft, a micro-concave trough sealing scraper is mounted on the upper and lower ends of the front side of the micro-concave trough, and the micro-concave trough forms a trough cavity after the micro-concave trough contacts the micro-gravure coating roller through the micro-concave trough sealing scraper, and the bottom of the micro-concave trough is provided with a feed port, and the top of the micro-concave trough is provided with an exhaust port. In actual operation, the micro-concave trough driving cylinder can be used to drive the micro-concave trough movable mounting seat to drive the micro-concave trough to move forward and backward to achieve closure or opening between the micro-gravure coating roller, and the coating enters the micro-concave trough from the feed port set at the bottom of the micro-concave trough, and is exhausted through the exhaust port set at the top of the micro-concave trough to reduce the generation of foam.

[0009] Preferably, a micro-concave trough rotation adjustment hand wheel is installed on the back of the micro-concave trough fixed shaft, and a mobile mounting seat limit rod that runs through the micro-concave trough mobile mounting seat in the horizontal direction is installed on the back of the micro-concave trough mobile mounting seat. In actual operation, the maximum stroke of the micro-concave trough mobile mounting seat can be limited by setting the mobile mounting seat limit rod to prevent excessive movement of the micro-concave trough from causing damage to the surface of the micro-gravure coating roller.

[0010] Preferably, the lower slightly concave support roller mechanism comprises a lower slightly concave support roller mounting seat, a lower slightly concave support roller mounting seat driving stroke cylinder is installed at the rear side of the lower slightly concave support roller mounting seat, and the lower slightly concave support roller is installed on the lower slightly concave support roller mounting seat. In actual operation, the lower slightly concave support roller mounting seat is driven by the lower slightly concave support roller mounting seat driving stroke cylinder to drive the lower slightly concave support roller to move forward and backward, so as to adapt to the coating requirements of different types of film materials and improve the adaptability of coating.

[0011] Preferably, the upper micro-dimpled support roller mechanism comprises an upper micro-dimpled support roller mounting seat, an upper micro-dimpled support roller mounting seat driving stroke cylinder is installed at the rear side of the upper micro-dimpled support roller mounting seat, and the upper micro-dimpled support roller is mounted on the upper micro-dimpled support roller mounting seat. In actual operation, the upper micro-dimpled support roller mounting seat is driven by the upper micro-dimpled support roller mounting seat driving stroke cylinder to drive the upper micro-dimpled support roller to move forward and backward, so as to adapt to the coating requirements of different types of film materials and improve the adaptability of coating.

[0012] Preferably, the single cantilever deflection correction and unwinding mechanism includes a deflection correction fixed base installed on a frame, a deflection correction movable base is installed on the deflection correction fixed base, a deflection correction actuator is installed at the bottom of the deflection correction fixed base and connected to the deflection correction movable base, an air shaft bearing fixing seat is installed on the deflection correction movable base, one end of the unwinding air shaft is installed in the air shaft bearing fixing seat, the other end of the unwinding air shaft is suspended, and the air shaft driving motor is installed on the back side of the air shaft bearing fixing seat and connected to the unwinding air shaft. During actual work, under the action of the deflection correction actuator, the unwinding air shaft can follow the deflection correction movable base to achieve left and right movement. The deflection correction movable base is connected to the deflection correction actuator with a connecting plate and moves with the mechanism together. When the unwinding electric eye detects the edge position of the film material, the deviation model is sent to the correction controller for processing. The correction controller controls the correction actuator to drive the unwinding air shaft that fixes the film material roll to move left and right to achieve the correction effect. In this way, the unwinding and correction can be achieved at the same time, which simplifies the overall structure. In addition, the single cantilever structure is adopted, which is more conducive to the roll changing operation.

[0013] Preferably, the tension adjustment swing roller mechanism comprises a tension swing roller adjustment seat mounted on the frame, a tension swing roller mounting seat mounted on the tension swing roller adjustment seat, a tension swing roller mounted on the tension swing roller mounting seat, an upper limit roller and a lower limit roller mounted on the left and right sides of the tension swing roller, respectively, a potentiometer mounted on the tension swing roller mounting seat, a tension swing roller cylinder mounted on the frame, and a telescopic shaft of the tension swing roller cylinder connected to the tension swing roller mounting seat, and an electric proportional valve mounted on the tension swing roller cylinder. In actual operation, the electric proportional valve is used to adjust the cylinder pressure, and the torque of the cylinder thrust is equal to the resultant torque of the tension. The potentiometer detects the position of the tension swing roller, and the potentiometer feeds back a signal to the PLC to perform PID adjustment control on the unwinding speed. The tension swing roller has a recoil storage effect on the film material. The tension control is independent of the film material tape running speed control. The electric proportional valve can accurately control the cylinder pressure, thereby controlling the tension. That is, the potentiometer can detect the position of the tension swing roller. The upper limit roller and the lower limit roller are the upper limit calibration position A and the lower limit calibration position B of the upper stroke of the potentiometer. The middle position C of the potentiometer satisfies C=(AB) / 2, which corresponds to the vertical position of the tension swing roller. The influence of gravity of the tension swing roller system on tension control is 0. When the tension swing roller produces an inclination, the potentiometer value D and the DC value are used to control the input value of the unwinding speed PID speed control. Furthermore, the value of DC corresponds to the angle θ between the tension swing roller and the vertical direction. The gravity of the tension swing roller system generates a component force F1 in the horizontal direction, thereby causing tension fluctuations. Through the PLC program, the calculation formula F1 of the component force of the θ-angle swing roller system is introduced to control the output value of the air pressure of the electric proportional valve to make the corresponding adjustment amount, which can further optimize the precise control of the tension.

[0014] Preferably, a material receiving trough is installed on the frame below the micro-gravure coating roller mechanism, and a material receiving baffle is installed below the material receiving trough. In actual operation, the coating that leaks or falls off the scraper can be recovered through the material receiving trough.

[0015] Preferably, a control panel is installed on the frame to facilitate the regulation of the overall working parameters of the equipment.

[0016] The beneficial effects of a coating device for micro-gravure coating provided by the utility model are:

[0017] (1) The coating device for micro-gravure coating is cleverly designed, compact in structure, easy to operate, and highly automated. In actual operation, the film roll to be coated is placed on a single cantilever deflection correction unwinding mechanism, which corrects the deflection while unwinding. The film is guided by the first guide roller and enters the tension adjustment swing roller mechanism for tension adjustment. Then, it enters the coating area composed of the lower micro-concave support roller mechanism, the upper micro-concave support roller mechanism, the micro-gravure coating roller mechanism, and the adjustable micro-concave trough mechanism through the second guide roller. The coating in the micro-concave trough is metered by the micro-concave coating roller in the micro-gravure coating roller mechanism and then coated on the surface of the film material, thereby achieving precise coating.

[0018] (2) The coating device for micro-gravure coating adopts a single-cantilever deflection correction unwinding mechanism to combine unwinding and deflection correction on the same structure. The structure is compact and can realize deflection correction while unwinding, which simplifies the overall structure. In addition, the single-cantilever structure is adopted, which is more conducive to the roll changing operation.

[0019] (3) The coating device for micro-gravure coating can achieve precise control of the tension of the film during unwinding and conveying through the structural design of the tension-adjusting swing roller mechanism, thereby improving the coating quality.

[0020] (4) The present invention sets the lower micro-concave support roller mechanism, the upper micro-concave support roller mechanism, and the adjustable micro-concave material trough mechanism to be movable and adjustable, which can meet the coating requirements of different types of film materials and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the three-dimensional structure of the utility model.

[0022] Figure 2 It is a rear view of the three-dimensional structure of the utility model.

[0023] Figure 3 It is a side sectional view of the utility model.

[0024] Figure 4 It is a schematic diagram of the installation structure of the lower micro-concave support roller mechanism, the upper micro-concave support roller mechanism, and the micro-concave coating roller mechanism in the utility model.

[0025] Figure 5 It is a schematic diagram of the installation structure of the single cantilever deviation correction and unwinding mechanism in the utility model.

[0026] Figure 6 It is a schematic diagram of the installation structure of the tension adjustment swing roller mechanism in the utility model.

[0027] Figure 7 It is a schematic diagram of the installation structure of the micro-gravure coating roller mechanism in the utility model.

[0028] In the figure: 1. frame; 2. single cantilever deflection correction unwinding mechanism; 21. unwinding air shaft; 22. air shaft bearing fixing seat; 23. deflection correction moving base; 24. bearing; 25. air shaft driving motor; 26. deflection correction fixing base; 27. deflection correction actuator; 3. first guide roller; 4. tension adjustment swing roller mechanism; 41. tension swing roller cylinder; 42. tension swing roller adjustment seat; 43. tension swing roller mounting seat; 44. potentiometer; 45. tension swing roller; 46. electric proportional valve; 47. upper limit roller; 48. lower limit roller; 5. second guide roller; 6. lower slightly concave support roller mechanism; 61. lower slightly concave support roller; 62. lower slightly concave support roller mounting seat; 63. lower slightly concave support roller mounting seat driving stroke cylinder; 7. upper slightly concave support roller mechanism; 71. upper slightly concave support roller; 72. Upper micro-concave support roller mounting seat; 73. Upper micro-concave support roller mounting seat driving stroke cylinder; 8. Coating lead-out roller; 9. Micro-concave trough closing scraper; 10. Micro-concave coating roller mechanism; 101. Micro-concave coating roller; 102. Micro-concave coating roller bearing seat; 103. Coupling; 104. Reducer; 105. Servo motor; 11. Adjustable micro-concave trough mechanism; 111. Micro-concave trough; 112. Exhaust port; 113. Feed port; 114. Trough cavity; 115. Micro-concave trough fixed shaft; 116. Micro-concave trough rotation adjustment hand wheel; 117. Micro-concave trough mobile mounting seat; 118. Mobile mounting seat limit rod; 12. Micro-concave trough driving cylinder; 13. Receiving trough; 14. Receiving baffle; 15. Control panel; 16. Micro-concave trough guide rail. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. All other embodiments obtained by ordinary personnel in this field without creative work are within the scope of protection of the utility model.

[0030] Embodiment: A coating device for micro-gravure coating.

[0031] Reference Figures 1 to 7As shown, a coating device for micro-gravure coating comprises: a frame 1, a single cantilever deflection correction unwinding mechanism 2 is installed on the frame 1, the single cantilever deflection correction unwinding mechanism 2 comprises a deflection correction fixed base 26 installed on the frame 1, a deflection correction movable base 23 is installed on the deflection correction fixed base 26, a deflection correction actuator 27 is installed at the bottom of the deflection correction fixed base 26 and connected to the deflection correction movable base 23, an air shaft bearing fixing seat 22 is installed on the deflection correction movable base 23, one end of the unwinding air shaft 21 is installed in the air shaft bearing fixing seat 22, and the other end of the unwinding air shaft 21 is suspended, and an air shaft driving motor 25 is installed on the back side of the air shaft bearing fixing seat 22 and connected to the unwinding air shaft 21. In actual operation, the deflection correction movable base 23 is connected to the deflection correction actuator 27 by a connecting plate, and moves with the mechanism together. Under the action of the deflection correction actuator 27, the unwinding air shaft 21 can move left and right following the deflection correction movable base 23. When the unwinding electric eye detects the edge position of the film material, the deviation model is sent to the deflection correction controller for processing. The deflection correction controller controls the deflection correction actuator 27 to drive the unwinding air shaft 21 that fixes the film material roll to move left and right to achieve the deflection correction effect, thereby realizing deflection correction while unwinding, simplifying the overall structure, and adopting a single cantilever structure, which is more conducive to the roll changing operation.

[0032] A first guide roller 3 is installed on the upper right of the single cantilever deviation correction unwinding mechanism 2, and a tension adjustment swing roller mechanism 4 is installed on the upper left of the first guide roller 3. The tension adjustment swing roller mechanism 4 includes a tension swing roller adjustment seat 42 installed on the frame 1, a tension swing roller mounting seat 43 is installed on the tension swing roller adjustment seat 42, a tension swing roller 45 is installed on the tension swing roller mounting seat 43, and an upper limit roller 47 and a lower limit roller 48 are installed on the left and right sides of the tension swing roller 45, respectively. A potentiometer 44 is installed on the tension swing roller mounting seat 43, and a tension swing roller cylinder 41 is installed on the frame 1, and the telescopic shaft of the tension swing roller cylinder 41 is connected to the tension swing roller mounting seat 43, and an electrical proportional valve 46 is installed on the tension swing roller cylinder 41. In actual work, the electrical proportional valve 46 is used to adjust the pressure of the tension swing roller cylinder 41, and the thrust torque of the tension swing roller cylinder 41 is equal to the resultant torque of the tension. The potentiometer 44 detects the position of the tension swing roller 45, and the potentiometer 44 feeds back the signal to the PLC to perform PID regulation and control on the unwinding speed. The tension swing roller 45 has a backwashing storage effect on the film material. The tension control is independent of the film material running speed control. The electrical proportional valve 46 can accurately control the pressure of the tension swing roller cylinder 41, thereby controlling the tension. That is, the potentiometer 44 can detect the position of the tension swing roller 45, the upper limit roller 47 and the lower limit roller 48 are the upper limit calibration position A and the lower limit calibration position B of the upper stroke of the potentiometer 44, and the middle position C of the potentiometer 44 satisfies C=(AB) / 2, corresponding to the vertical position of the tension swing roller 45. The gravity of the tension swing roller 45 system has a zero effect on the tension control. When the tension swing roller 45 has an inclination, the value D of the potentiometer 44, the DC value, is used to control the input value of the unwinding speed PID speed control. Further, the value of DC corresponds to the angle θ between the tension swing roller 45 and the vertical direction. The gravity of the tension swing roller 45 system generates a force component F1 in the horizontal direction, which causes tension fluctuations. Through the PLC program, the calculation formula F1 of the θ angle swing roller system force component is introduced to control the output value of the air pressure of the electrical proportional valve 46 to make the corresponding adjustment amount, which can further optimize the precise control of the tension.

[0033] A second guide roller 5 is installed on the upper right of the tension adjustment swing roller mechanism 4, and a lower micro-dimpled support roller mechanism 6 and an upper micro-dimpled support roller mechanism 7 are installed above the second guide roller 5, and the lower micro-dimpled support roller mechanism 6 includes a lower micro-dimpled support roller mounting seat 62, and a lower micro-dimpled support roller mounting seat driving stroke cylinder 63 is installed on the rear side of the lower micro-dimpled support roller mounting seat 62, and the lower micro-dimpled support roller 61 is installed on the lower micro-dimpled support roller mounting seat 62. In actual operation, the lower micro-dimpled support roller mounting seat 62 is driven by the lower micro-dimpled support roller mounting seat driving stroke cylinder 63 to drive the lower micro-dimpled support roller 61 to move forward and backward, so as to adapt to the coating requirements of different types of film materials and improve the adaptability of coating. The upper micro-dimpled support roller mechanism 7 includes an upper micro-dimpled support roller mounting seat 72, and an upper micro-dimpled support roller mounting seat driving stroke cylinder 73 is installed on the rear side of the upper micro-dimpled support roller mounting seat 72, and the upper micro-dimpled support roller 71 is installed on the upper micro-dimpled support roller mounting seat 72. In actual operation, the upper slightly concave support roller mounting seat 72 is driven by the upper slightly concave support roller mounting seat driving stroke cylinder 73 to drive the upper slightly concave support roller 71 to move forward and backward, so as to meet the coating requirements of different types of film materials and improve the coating adaptability.

[0034] The micro-gravure coating roller mechanism 10 is installed between the lower micro-gravure support roller mechanism 6 and the upper micro-gravure support roller mechanism 7. The micro-gravure coating roller mechanism 10 includes micro-gravure coating roller bearing seats 102 installed on the front and rear sides of the frame 1. The micro-gravure coating roller 101 is installed on the micro-gravure coating roller bearing seat 102. One end of the micro-gravure coating roller 101 is connected to the reducer 104 through a coupling 103, and the input shaft of the reducer 104 is connected to the servo motor 105. In actual operation, the micro-gravure coating roller 101 can be driven to rotate by the servo motor 105. During the rotation process, the micro-gravure coating roller 101 transfers the coating in the micro-gravure material tank 111 to the micro-gravure coating roller 101, and is coated on the surface of the film material after being measured by the micro-gravure material tank closed scraper 9.

[0035] The adjustable micro-concave trough mechanism 11 is installed on the outside of the micro-gravure coating roller mechanism 10, and the adjustable micro-concave trough mechanism 11 includes a micro-concave trough guide rail 16 installed on the frame 1, and a micro-concave trough movable mounting seat 117 is installed on the micro-concave trough guide rail 16. The micro-concave trough driving cylinder 12 is installed on the frame 1 and connected to the micro-concave trough movable mounting seat 117. The micro-concave trough 111 is fixed on the micro-concave trough movable mounting seat 117 through a micro-concave trough fixed shaft 115. The micro-concave trough closed scraper 9 is installed at the upper and lower ends of the front side of the micro-concave trough 111. The micro-concave trough 111 forms a trough cavity 114 after contacting the micro-gravure coating roller 101 through the micro-concave trough closed scraper 9. The bottom of the micro-concave trough 111 is provided with a feed port 113, and the top of the micro-concave trough 111 is provided with an exhaust port 112. In actual operation, the micro-concave trough driving cylinder 12 can be used to drive the micro-concave trough movable mounting seat 117 to drive the micro-concave trough 111 to move forward and backward, so as to achieve closure or opening between the micro-concave coating roller 101, and the coating enters the micro-concave trough 111 from the feed port 113 set at the bottom of the micro-concave trough 111, and exhausts through the exhaust port 112 set at the top of the micro-concave trough 111, thereby reducing the generation of foam. The back of the micro-concave trough fixed shaft 115 is equipped with a micro-concave trough rotation adjustment hand wheel 116, and the back of the micro-concave trough movable mounting seat 117 is equipped with a movable mounting seat limit rod 118 that runs through the micro-concave trough movable mounting seat 117 in the horizontal direction. In actual operation, the maximum stroke of the micro-concave trough movable mounting seat 117 can be limited by setting the movable mounting seat limit rod 118 to prevent the excessive movement of the micro-concave trough 111 from causing damage to the surface of the micro-concave coating roller 101. By setting the micro-concave trough rotation adjustment hand wheel 116, the installation angle of the micro-concave trough 111 can be fine-tuned through the micro-concave trough fixing shaft 115, so as to better meet the coating requirements of different film materials. The coating lead-out roller 8 is installed above the upper micro-concave support roller mechanism 7.

[0036] A material receiving trough 13 is installed on the frame 1 below the micro-gravure coating roller mechanism 10, and a material receiving baffle 14 is installed below the material receiving trough 13. In actual operation, the coating that leaks or falls off the scraper can be recovered through the material receiving trough 13. A control panel 15 is also installed on the frame 1 to facilitate the regulation of the overall working parameters of the device.

[0037] The coating device for micro-gravure coating is cleverly designed, compact in structure, easy to operate, and highly automated. The single cantilever deflection correction unwinding mechanism 2 is used to combine unwinding and deflection correction on the same structure. The compact structure can realize deflection correction while unwinding, simplifying the overall structure. The single cantilever structure is used, which is more conducive to the roll changing operation. Through the structural design of the tension adjustment swing roller mechanism 4, the tension of the film material during the unwinding and conveying process can be accurately controlled, thereby improving the coating quality. The lower micro-concave support roller mechanism 6, the upper micro-concave support roller mechanism 7, and the adjustable micro-concave material trough mechanism 11 are all set to be movable and adjustable, which can meet the coating requirements of different types of film materials and has strong adaptability. During actual work, the film roll to be coated is placed on the single-cantilever deflection correction and unwinding mechanism 2, which corrects the deflection while unwinding. The film is guided by the first guide roller 3 and then enters the tension adjustment swing roller mechanism 4 for tension adjustment. Then, it enters the coating area composed of the lower micro-concave support roller mechanism 6, the upper micro-concave support roller mechanism 7, the micro-gravure coating roller mechanism 10 and the adjustable micro-concave material trough mechanism 11 through the second guide roller 5. The coating in the micro-concave material trough 111 is coated on the surface of the film after being measured by the micro-concave material trough closing scraper 9 through the micro-gravure coating roller 101 in the micro-gravure coating roller mechanism 10, thereby achieving precise coating.

[0038] The above is only a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment and the drawings, so any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A coating device for micro-gravure coating, comprising a frame, characterized in that: A single cantilever deflection correction and unwinding mechanism is installed on the frame, a first guide roller is installed on the upper right of the single cantilever deflection correction and unwinding mechanism, a tension adjustment swing roller mechanism is installed on the upper left of the first guide roller, a second guide roller is installed on the upper right of the tension adjustment swing roller mechanism, a lower micro-concave support roller mechanism and an upper micro-concave support roller mechanism arranged side by side and spaced apart are installed above the second guide roller, a micro-concave coating roller mechanism is installed between the lower micro-concave support roller mechanism and the upper micro-concave support roller mechanism, an adjustable micro-concave material trough mechanism is installed on the outer side of the micro-concave coating roller mechanism, micro-concave material trough closing scrapers are installed at the upper and lower contact points between the micro-concave material trough in the adjustable micro-concave material trough mechanism and the micro-concave coating roller in the micro-concave coating roller mechanism, and a coating lead-out roller is installed above the upper micro-concave support roller mechanism.

2. The coating device for micro-gravure coating according to claim 1, characterized in that: The micro-gravure coating roller mechanism includes micro-gravure coating roller bearing seats installed on the front and rear sides of the frame, the micro-gravure coating roller is installed on the micro-gravure coating roller bearing seats, one end of the micro-gravure coating roller is connected to the reducer through a coupling, and the input shaft of the reducer is connected to the servo motor.

3. The coating device for micro-gravure coating according to claim 2, characterized in that: The adjustable micro-concave trough mechanism includes a micro-concave trough guide rail installed on a frame, a micro-concave trough movable mounting seat installed on the micro-concave trough guide rail, a micro-concave trough driving cylinder installed on the frame and connected to the micro-concave trough movable mounting seat, the micro-concave trough is fixed to the micro-concave trough movable mounting seat through a micro-concave trough fixed shaft, a micro-concave trough closed scraper is installed at the upper and lower ends of the front side of the micro-concave trough, and the micro-concave trough forms a trough cavity after the micro-concave trough contacts the micro-gravure coating roller through the micro-concave trough closed scraper, a feed port is provided at the bottom of the micro-concave trough, and an exhaust port is provided at the top of the micro-concave trough.

4. The coating device for micro-gravure coating according to claim 3, characterized in that: A micro-concave material trough rotation adjustment hand wheel is installed on the back of the micro-concave material trough fixed shaft, and a movable mounting seat limiting rod which penetrates the micro-concave material trough movable mounting seat in the horizontal direction is installed on the back of the micro-concave material trough movable mounting seat.

5. The coating device for micro-gravure coating according to claim 1, characterized in that: The lower slightly concave support roller mechanism comprises a lower slightly concave support roller mounting seat, a lower slightly concave support roller mounting seat driving stroke cylinder is installed on the rear side of the lower slightly concave support roller mounting seat, and the lower slightly concave support roller is installed on the lower slightly concave support roller mounting seat.

6. The coating device for micro-gravure coating according to claim 5, characterized in that: The upper slightly concave support roller mechanism comprises an upper slightly concave support roller mounting seat, an upper slightly concave support roller mounting seat driving stroke cylinder is installed on the rear side of the upper slightly concave support roller mounting seat, and the upper slightly concave support roller is installed on the upper slightly concave support roller mounting seat.

7. The coating device for micro-gravure coating according to claim 1, characterized in that: The single cantilever deflection correction and unwinding mechanism includes a deflection correction fixed base installed on a frame, a deflection correction movable base is installed on the deflection correction fixed base, a deflection correction actuator is installed at the bottom of the deflection correction fixed base and connected to the deflection correction movable base, an air shaft bearing fixing seat is installed on the deflection correction movable base, one end of the unwinding air shaft is installed in the air shaft bearing fixing seat, and the other end of the unwinding air shaft is suspended, and the air shaft driving motor is installed on the back side of the air shaft bearing fixing seat and connected to the unwinding air shaft.

8. The coating device for micro-gravure coating according to claim 1, characterized in that: The tension adjustment swing roller mechanism includes a tension swing roller adjustment seat installed on the frame, a tension swing roller mounting seat installed on the tension swing roller adjustment seat, a tension swing roller installed on the tension swing roller mounting seat, an upper limit roller and a lower limit roller are installed on the left and right sides of the tension swing roller respectively, a potentiometer is installed on the tension swing roller mounting seat, a tension swing roller cylinder is installed on the frame, and the telescopic shaft of the tension swing roller cylinder is connected to the tension swing roller mounting seat, and an electrical proportional valve is installed on the tension swing roller cylinder.

9. The coating device for micro-gravure coating according to claim 1, characterized in that: A material receiving trough is installed on the frame below the micro-gravure coating roller mechanism, and a material receiving baffle is installed below the material receiving trough.

10. The coating device for micro-gravure coating according to claim 1, characterized in that: A control panel is installed on the frame.

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