Automatic unwinding deviation rectifying device for coating printing and deviation rectifying method of automatic unwinding deviation rectifying device

Abstract

The invention discloses a coating printing automatic unwinding deviation rectifying device and a deviation rectifying method thereof. The coating printing automatic unwinding deviation rectifying device comprises an unwinding roller detachably arranged on an unwinding mechanism; the tension roller is arranged on a tension adjusting mechanism for adjusting coating tension; the two ends of the deviation rectifying rod are arranged on a deviation rectifying mechanism used for conducting horizontal deviation rectifying on the coating and a tension balancing mechanism used for conducting balance adjustment on tension on the two sides of the coating respectively; tension sensors are arranged at the two ends of the tension detection roller, and the tension detection roller is used for carrying out tension detection on the two sides of the passing coating; the displacement detection sensor is used for performing offset detection on the passing coating; according to the scheme, through cooperation of the unwinding mechanism, the tension adjusting mechanism, the deviation correcting mechanism, the tension balancing mechanism, the tension detecting roller and the displacement detecting sensor, double dynamic balance of the coating position and tension can be achieved, the stability and precision of the coating output process are ensured, and therefore smooth output of coating is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of coating and printing equipment, and particularly relates to a coating and printing automatic unwinding deviation rectifying device and a deviation rectifying method thereof. Background Art

[0002] Coating and printing is a technology that combines coating and printing processes, referring to the process of evenly covering a thin layer of liquid material (such as paint, glue, ink, etc.) on the surface of a substrate material (such as paper, plastic film, metal foil, etc.). The main purpose is to improve the surface properties of the substrate material, such as enhancing the gloss and smoothness of paper and improving its ink absorption; or to endow the material with some special functions, such as waterproof, moisture-proof, oil-proof, wear-resistant, heat-insulating, electromagnetic shielding, etc. To ensure the quality and efficiency of coating and printing, during the coating and printing process, an automatic unwinding deviation rectifying structure needs to be used in cooperation to restrict the substrate material.

[0003] For example, a packaging bag printing machine with a deviation rectifying structure with the authorization announcement number CN221875896U includes a workbench and a water pump. The left end inside the workbench is rotatably connected with an unwinding roller, the top of the workbench is rotatably connected with a support roller, the right side of the top of the workbench is fixedly connected with a support frame, the bottom ends inside the support frame are fixedly connected with fixed blocks, a shunt pipe is fixedly connected between adjacent fixed blocks, the bottom ends of the shunt pipes are all communicated with spray nozzles, and telescopic rods are fixedly connected near the edges at the top ends inside the support frame.

[0004] In this device, the unwinding roller and the winding roller are not convenient to disassemble and replace before and after use, which to a certain extent affects the feeding and winding roll changing, thus affecting the processing efficiency of the device. At the same time, in this device, through the mutual cooperation of the designed unwinding roller, support roller, processing table, winding roller, double-sided tape, telescopic rod, suction cup, water pump, shunt pipe and spray nozzle, the printed substrate material is limited to prevent tilting and deviation during the printing process. When the above parts are combined to limit the substrate material, the initial state of the substrate material cannot be adjusted and the position of the substrate material is fixed, which affects the processing efficiency and cannot adjust the substrate material that deviates at the initial position. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the present invention provides a coating and printing automatic unwinding deviation rectifying device and a deviation rectifying method thereof, which solve the technical problems mentioned in the above background art.

[0006] To achieve the above object, the technical solutions adopted by the present invention are as follows:

[0007] In a first aspect, a coating printing automatic unwinding and deviation rectifying device is provided, which includes: an unwinding roller detachably arranged on an unwinding mechanism; a tension roller arranged on a tension adjusting mechanism for adjusting the coating tension; a deviation rectifying rod, with both ends of the deviation rectifying rod respectively arranged on a deviation rectifying mechanism for horizontally rectifying the coating and a tension balance mechanism for balancing and adjusting the tensions on both sides of the coating; a tension detection roller, with tension sensors arranged at both ends of the tension detection roller for detecting the tensions on both sides of the passing coating; a displacement detection sensor for detecting the deviation of the passing coating; a fixed base plate, with a first vertical plate and a second vertical plate integrally formed on both sides of the fixed base plate, and the unwinding mechanism, the tension adjusting mechanism, the deviation rectifying mechanism, the tension balance mechanism, the tension detection roller and the displacement detection sensor are installed on the first vertical plate and the second vertical plate and are all electrically connected to a controller.

[0008] Further, the unwinding mechanism includes two first rotating ring seats respectively arranged on the first vertical plate and the second vertical plate, one of the first rotating ring seats is in transmission connection with a driving motor, engaging seats are arranged at the ends of the two first rotating ring seats close to each other, T-shaped grooves are arranged at the ends of the two engaging seats close to each other, T-shaped blocks respectively engaged with the two T-shaped grooves are arranged at both ends of the unwinding roller, a locking bolt is fitted on the engaging seat and simultaneously penetrates through the T-shaped block and the side wall of the T-shaped groove.

[0009] Further, the number of the tension rollers is two, and the two tension rollers are arranged in parallel. The tension adjusting mechanism includes two connecting plates, and the two ends of the two connecting plates are respectively rotatably connected to the ends of the two tension rollers on the same side. The middle parts of the two connecting plates are respectively rotatably connected to the inner sides of the first vertical plate and the second vertical plate through rotating shafts, and one of the rotating shafts is connected to a swinging mechanism for driving it to swing.

[0010] Further, the swinging mechanism includes a transmission ring fixedly sleeved on the outer end of the rotating shaft, a hinged ear seat is arranged on the outer side wall of the transmission ring, the hinged ear seat is vertically hinged to the telescopic end of a third telescopic cylinder, and the fixed end of the third telescopic cylinder is rotatably connected to the second vertical plate through a second rotating ring seat.

[0011] Further, the tension balance mechanism includes a first installation groove opened on the first vertical plate, a first telescopic cylinder extending upward is embedded at the bottom of the first installation groove, and the telescopic end of the first telescopic cylinder is fixedly connected to a lifting slider. Sliding grooves are opened on both side walls of the first installation groove, and both sides of the lifting slider are slidably matched with the two sliding grooves respectively. A horizontal rotating block is movably arranged on the top of the lifting slider, an opening groove is opened on the side surface of the horizontal rotating block, a connecting block is arranged at one end of the deviation rectifying rod, and the connecting block is vertically hinged in the opening groove.

[0012] Further, the deviation rectifying mechanism includes a second installation groove formed in the second vertical plate. Two horizontal and parallel guide plates are arranged in the second installation groove. A translation slider is slidably arranged between the two guide plates. A horizontally extending second telescopic cylinder is embedded in the side wall of the second installation groove, and the telescopic end of the second telescopic cylinder is fixedly connected to one side of the translation slider. A horizontally rotating block is movably arranged on the top of the translation slider. An opening groove is formed in the side surface of the horizontally rotating block. One end of the deviation rectifying rod is provided with a connecting block, and the connecting block is vertically hinged in the opening groove.

[0013] Further, a cross pin is arranged at the inner end of the connecting block, and a cross slot for socket matching with the cross pin is arranged at the end of the deviation rectifying rod.

[0014] Further, the telescopic direction of the second telescopic cylinder is parallel to the coating direction.

[0015] Second, a deviation rectifying method for a coating and printing automatic unwinding deviation rectifying device is provided, which includes the following steps:

[0016] S1: The deviation value of the coating deviating from the preset position is measured in real time by a displacement detection sensor. When the deviation value is greater than the preset deviation threshold, step S2 is executed; otherwise, no deviation rectifying operation is performed. The tension values on both sides of the coating are measured in real time by a tension sensor. When the difference between the tension values on both sides is greater than the preset tension threshold, step S3 is executed; otherwise, no tension balancing operation is performed.

[0017] S2: Calculate the horizontal offset angle of one end of the deviation rectifying rod according to the deviation value, and after driving one end of the deviation rectifying rod to perform horizontal offset adjustment through the deviation rectifying mechanism, step S4 is executed;

[0018] S3: Calculate the vertical offset angle of the other end of the deviation rectifying rod according to the difference between the tension values on both sides, and after driving the other end of the deviation rectifying rod to perform vertical offset adjustment through the tension balancing mechanism, step S4 is executed;

[0019] S4: Repeat step S1 until the deviation value of the coating and the difference between the tension values on both sides of the coating dynamically change within the deviation threshold and the tension threshold respectively.

[0020] Further, the calculation formula for the horizontal offset angle is:

[0021]

[0022] where θ is the horizontal offset angle, Δx n is the deviation value of the coating, L is the length of the deviation rectifying rod, and k is a correction coefficient, and its range is 0.95 - 1.05;

[0023] The calculation formula for the vertical offset angle is:

[0024]

[0025] Wherein, φ is the vertical offset angle, ΔT is the difference between the tension values on both sides, and T avg is the average value of the tension values on both sides.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. This solution uses a displacement detection sensor to monitor the coating offset in real time, and combines a deviation correction mechanism to drive the deviation correction rod for horizontal offset adjustment; at the same time, the tension difference between both sides is detected by a tension sensor, and the tension balance mechanism is used to drive the deviation correction rod for vertical offset adjustment, realizing the dual dynamic balance of the coating position and tension, ensuring the stability and accuracy of the coating output process, and thus realizing the flat output of the coating.

[0028] 2. This solution can keep the tension on both sides of the coating output from the unwind roll in dynamic balance through the tension balance mechanism. During use, one end of the deviation correction rod can be driven to move up and down by the first telescopic cylinder, so as to adjust the wrap angle between the coating and the deviation correction rod, change the direction and magnitude of the frictional force, and further realize the adjustment of the tension on both sides of the coating, so that the fluctuation of the tension on both sides is always kept within the tension threshold range.

[0029] 3. This solution can correct the deviation of the coating through the deviation correction mechanism to prevent the coating from deviating excessively and affecting the processing quality of the coating. During use, the other end of the deviation correction rod can be driven to move horizontally by the second telescopic cylinder, and the deviated coating can be reversely offset under the action of the frictional force by the horizontally offset deviation correction rod, so as to gradually eliminate the deviation value of the coating.

[0030] 4. This solution realizes the sliding telescopic connection between one end of the deviation correction rod and the connecting block through the cooperation of the cross pin and the cross slot, so as to compensate for the length change caused by the angle adjustment of the deviation correction rod.

[0031] 5. This solution realizes the quick disassembly and replacement of the unwind roll through the cooperation of the T-shaped blocks at both ends of the unwind roll and the T-shaped grooves of the engaging seats, combined with the fixing of the locking bolts, significantly improving the equipment maintenance and roll changing efficiency and reducing the downtime.

[0032] 6. This solution can drive the two tension rollers to perform circular motion or swing through the telescopic movement of the third telescopic cylinder, so as to adjust the tension of the coating passing between the two tension rollers to ensure the printing quality of the coating. Description of the Drawings

[0033] Figure 1 is the first structural schematic diagram of the automatic unwind deviation correction device for coating printing.

[0034] Figure 2 is Figure 1 the partial enlarged view of area C in

[0035] Figure 3 It is the second structural schematic diagram of the automatic uncoiling and deviation rectifying device for coating and printing.

[0036] Figure 4 It is Figure 3 the partial enlarged view of area A in

[0037] Figure 5 It is the third structural schematic diagram of the automatic uncoiling and deviation rectifying device for coating and printing.

[0038] Figure 6 It is Figure 5 the partial enlarged view of area B in

[0039] Wherein, 1. fixed base plate; 2. first vertical plate; 3. first installation groove; 4. sliding groove; 5. lifting slider; 6. horizontal rotating block; 7. connecting block; 8. deviation rectifying rod; 9. first telescopic cylinder; 10. cross slot; 11. second vertical plate; 12. second installation groove; 13. guide plate; 14. translation slider; 15. second telescopic cylinder; 16. cross pin; 17. driving motor; 18. first rotating ring seat; 19. engaging seat; 20. locking bolt; 21. T-shaped block; 22. uncoiling roller; 23. mounting seat; 24. tension detection roller; 25. controller; 26. second rotating ring seat; 27. third telescopic cylinder; 28. hinge ear seat; 29. rotating shaft; 30. connecting plate; 31. tension roller; 32. guide roller; 33. displacement detection sensor. Specific embodiments

[0040] The specific embodiments of the present invention will be described below to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0041] Such as Figures 1 to 6As shown, the automatic unwinding and deviation correction device for coating printing of this scheme includes an unwinding roller 22, a tension roller 31, a guide roller, a deviation correction rod 8, a tension detection roller 24, a displacement detection sensor 33 and a fixed base plate 1, the unwinding roller 22 is detachably arranged on the unwinding mechanism; the tension roller 31 is arranged on a tension adjustment mechanism for adjusting the coating tension; the two ends of the deviation correction rod 8 are respectively arranged on a deviation correction mechanism for horizontally correcting the coating and a tension balancing mechanism for balancing the tension on both sides of the coating; the two ends of the tension detection roller 24 are limited and fixed by a mounting seat 23, and tension sensors are provided at both ends of the tension detection roller 24, which are used to detect the tension on both sides of the passing coating; the displacement detection sensor 33 is used to detect the offset of the passing coating; the first vertical plate 2 and the second vertical plate 11 are integrally formed on both sides of the fixed base plate 1, and the unwinding mechanism, the tension adjustment mechanism, the deviation correction mechanism, the tension balancing mechanism, the tension detection roller 24 and the displacement detection sensor 33 are installed on the first vertical plate 2 and the second vertical plate 11 and are all electrically connected to the controller 25.

[0042] After the coating of this solution is pulled out from the unwinding roller 22, it first passes over the tension detection roller 24, then passes over the guide roller, and then passes between the two tension rollers 31, and finally passes over the correction rod 8 and is introduced into the printing press; through the friction between the guide roller and the coating, the tension of the coating can be adjusted and controlled to a certain extent, thereby smoothing the coating.

[0043] like Figure 2 and Figure 3 As shown, as an optional embodiment, the unwinding mechanism includes two first rotating circle seats 18 respectively arranged on the first vertical plate 2 and the second vertical plate 11, one of the first rotating circle seats 18 is connected to the driving motor 17, and the two first rotating circle seats 18 are each provided with a snap-fit seat 19 at one end close to each other, and the two snap-fit seats 19 are each provided with a T-shaped slot at one end close to each other, and both ends of the unwinding roller 22 are provided with T-shaped blocks 21 respectively engaged with the two T-shaped slots, and the snap-fit seat 19 is equipped with a locking bolt 20, and the locking bolt 20 passes through the T-shaped block 21 and the side wall of the T-shaped slot at the same time.

[0044] The driving motor 17 of this embodiment can drive the first rotating ring seat 18, thereby driving the engaging seat 19, so that the unwinding roller 22 rotates accordingly. When installing the unwinding roller 22, the T-shaped blocks 21 at both ends of the unwinding roller 22 are clamped in the T-shaped grooves of the engaging seat 19, and then the locking bolts 20 are used to fix it to the engaging seat 19. When disassembling, the locking bolts 20 are removed, the limit on both ends of the unwinding roller 22 is released, and the unwinding roller 22 can be removed, thereby realizing the rapid disassembly and replacement of the unwinding roller 22, significantly improving the equipment maintenance and roll changing efficiency, and reducing downtime.

[0045] like Figure 1 and Figure 3As shown, as an alternative embodiment, the number of tension rollers 31 is two, and the two tension rollers 31 are arranged in parallel. The tension adjusting mechanism includes two connecting plates 30. The two ends of the two connecting plates 30 are respectively rotatably connected to the ends of the two tension rollers 31 on the same side. The middle parts of the two connecting plates 30 are respectively rotatably connected to the inner sides of the first vertical plate 2 and the second vertical plate 11 through a rotating shaft 29. One of the rotating shafts 29 is connected to a swinging mechanism that drives its swinging.

[0046] The swinging mechanism includes a transmission ring fixedly sleeved on the outer side end of the rotating shaft 29. An articulated ear seat 28 is arranged on the outer side wall of the transmission ring. The articulated ear seat 28 is vertically articulated with the telescopic end of the third telescopic cylinder 27. The fixed end of the third telescopic cylinder 27 is rotatably connected to the second vertical plate 11 through a second rotating ring seat 26. When the third telescopic cylinder 27 expands and contracts, the fixed end of the third telescopic cylinder 27 will rotate along the second rotating ring seat 26. At the same time, the transmission ring is stressed and rotates, driving the transmission shaft to rotate, so as to drive the two tension rollers 31 to perform circular motion or swing, thereby adjusting the tension of the coating passing between the two tension rollers 31 to ensure the printing quality of the coating.

[0047] As Figure 3 and Figure 4 As shown, as an alternative embodiment, the tension balancing mechanism includes a first installation groove 3 opened on the first vertical plate 2. A first telescopic cylinder 9 extending upward is embedded at the bottom of the first installation groove 3. The telescopic end of the first telescopic cylinder 9 is fixedly connected to a lifting slider 5. Sliding grooves 4 are opened on both side walls of the first installation groove 3. The two sides of the lifting slider 5 are respectively slidably matched with the two sliding grooves 4. A horizontal rotating block 6 is movably arranged on the top of the lifting slider 5. An opening groove is opened on the side surface of the horizontal rotating block 6. One end of a deviation rectifying rod 8 is provided with a connecting block 7. The connecting block 7 is vertically articulated in the opening groove.

[0048] In this embodiment, the first telescopic cylinder 9 can drive one end of the deviation rectifying rod 8 to perform lifting adjustment, so as to adjust the wrap angle between the coating and the deviation rectifying rod 8, change the direction and magnitude of the frictional force, and further realize the adjustment of the tensions on both sides of the coating, so that the fluctuations of the tensions on both sides are always kept within the tension threshold range.

[0049] As Figure 5 and Figure 6As shown, as an optional embodiment, the deviation rectifying mechanism includes a second installation groove 12 formed in the second vertical plate 11. Two horizontal and parallel guide plates 13 are arranged in the second installation groove 12. A translation slider 14 is slidably arranged between the two guide plates 13. A horizontally extending second telescopic cylinder 15 is embedded in the side wall of the second installation groove 12. The telescopic end of the second telescopic cylinder 15 is fixedly connected to one side of the translation slider 14, and the telescopic direction of the second telescopic cylinder 15 is parallel to the coating direction. A horizontally rotating block 6 is movably arranged on the top of the translation slider 14. An opening groove is formed in the side surface of the horizontally rotating block 6. One end of the deviation rectifying rod 8 is provided with a connecting block 7, and the connecting block 7 is vertically hinged in the opening groove.

[0050] In this embodiment, the second telescopic cylinder 15 can drive the other end of the deviation rectifying rod 8 to perform horizontal offset. Under the action of friction, the horizontally offset deviation rectifying rod 8 can make the deviated coating perform reverse offset, so as to gradually eliminate the deviation value of the coating.

[0051] As Figure 5 shown, as an optional embodiment, a cross pin 16 is arranged at the inner end of the connecting block 7, and a cross slot 10 which is in socket fit with the cross pin 16 is arranged at the end of the deviation rectifying rod 8. Such a setting enables one end of the deviation rectifying rod 8 to slide axially on the cross pin 16, so as to realize a sliding telescopic connection between one end of the deviation rectifying rod 8 and the connecting block 7, and compensate for the distance change caused by the angle adjustment of the deviation rectifying rod 8.

[0052] This solution also provides a deviation rectifying method for the deviation rectifying device of the automatic unwind and deviation rectifying of coating printing, which includes the following steps:

[0053] S1: The deviation value of the coating deviating from the preset position is measured in real time by the displacement detection sensor 33. When the deviation value is greater than the preset deviation threshold, step S2 is executed; otherwise, no deviation rectifying operation is performed. The tension values on both sides of the coating are measured in real time by the tension sensor. When the difference between the tension values on both sides is greater than the preset tension threshold, step S3 is executed; otherwise, no tension balancing operation is performed;

[0054] S2: Calculate the horizontal offset angle of one end of the deviation rectifying rod 8 according to the deviation value, and after driving one end of the deviation rectifying rod 8 to perform horizontal offset adjustment by the deviation rectifying mechanism, execute step S4;

[0055] S3: Calculate the vertical offset angle of the other end of the deviation rectifying rod 8 according to the difference between the tension values on both sides, and after driving the other end of the deviation rectifying rod 8 to perform vertical offset adjustment by the tension balancing mechanism, execute step S4;

[0056] S4: Repeat step S1 until the deviation value of the coating and the difference between the tension values on both sides of the coating change dynamically within the deviation threshold and the tension threshold respectively.

[0057] Furthermore, the calculation formula for the horizontal offset angle is:

[0058]

[0059] where θ is the horizontal offset angle, Δx n is the deviation value of the coating, L is the length of the deviation correction rod 8, k is the correction coefficient, and its range is 0.95 - 1.05; specifically, the horizontal offset direction of the horizontal offset angle θ can be determined according to the deviation direction of the coating deviation value Δx n ;

[0060] The calculation formula for the vertical offset angle is:

[0061]

[0062] where φ is the vertical offset angle, ΔT is the difference between the tension values on both sides, and T avg is the average value of the tension values on both sides; specifically, the vertical offset direction of the vertical offset angle can be determined according to the positive or negative of the difference between the tension values on both sides.

Claims

1. An automatic unwind and deviation rectification device for coating and printing, characterized in that, Including: An unwind roller, which is detachably arranged on the unwind mechanism; A tension roller, which is arranged on a tension adjusting mechanism for adjusting the coating tension; A deviation rectifying rod, with both ends of the deviation rectifying rod respectively arranged on a deviation rectifying mechanism for horizontally rectifying the coating and a tension balance mechanism for balancing and adjusting the tensions on both sides of the coating; A tension detection roller, with tension sensors arranged at both ends of the tension detection roller, which is used for detecting the tensions on both sides of the passing coating; A displacement detection sensor, which is used for detecting the deviation of the passing coating; A fixed substrate, with a first vertical plate and a second vertical plate integrally formed on both sides of the fixed substrate, and the unwind mechanism, the tension adjusting mechanism, the deviation rectifying mechanism, the tension balance mechanism, the tension detection roller and the displacement detection sensor are installed on the first vertical plate and the second vertical plate and are all electrically connected to a controller.

2. The coating and printing automatic unwind deviation rectifying device according to claim 1, characterized in that The unwind mechanism includes two first rotating ring seats respectively arranged on the first vertical plate and the second vertical plate, one of the first rotating ring seats is in transmission connection with a driving motor, engaging seats are arranged at the mutually approaching ends of the two first rotating ring seats, T-shaped grooves are arranged at the mutually approaching ends of the two engaging seats, T-shaped blocks respectively engaged with the two T-shaped grooves are arranged at both ends of the unwind roller, and a locking bolt is fitted on the engaging seat and simultaneously penetrates through the T-shaped block and the side wall of the T-shaped groove.

3. The coating and printing automatic unwind deviation rectifying device according to claim 1, characterized in that, The number of the tension rollers is two, and the two tension rollers are arranged in parallel. The tension adjusting mechanism includes two connecting plates, and both ends of the two connecting plates are respectively rotationally connected to the ends of the two tension rollers on the same side. The middle parts of the two connecting plates are respectively rotationally connected to the inner sides of the first vertical plate and the second vertical plate through rotating shafts, and one of the rotating shafts is connected to a swinging mechanism for driving it to swing.

4. The coating and printing automatic unwind deviation rectifying device according to claim 3, wherein, The swinging mechanism includes a transmission ring fixedly sleeved on the outer side end of the rotating shaft, an articulated ear seat is arranged on the outer side wall of the transmission ring, the articulated ear seat is vertically articulated with the telescopic end of a third telescopic cylinder, and the fixed end of the third telescopic cylinder is rotationally connected to the second vertical plate through a second rotating ring seat.

5. The automatic unwinding and deviation rectifying device for coating and printing according to claim 1, wherein, The tension balance mechanism includes a first installation groove opened on the first vertical plate, a first telescopic cylinder extending upward is embedded at the bottom of the first installation groove, and the telescopic end of the first telescopic cylinder is fixedly connected to a lifting slider. Sliding grooves are opened on both side walls of the first installation groove, and both sides of the lifting slider are respectively in sliding fit with the two sliding grooves. A horizontal rotating block is movably arranged on the top of the lifting slider, an opening groove is opened on the side surface of the horizontal rotating block, a connecting block is arranged at one end of the deviation rectifying rod, and the connecting block is vertically articulated in the opening groove.

6. The automatic unwind deviation rectification device for coating and printing according to claim 1, wherein The deviation rectifying mechanism includes a second installation groove formed in the second vertical plate. Two horizontal and parallel guide plates are arranged in the second installation groove. A translation slider is slidably arranged between the two guide plates. A horizontally extending second telescopic cylinder is embedded in the side wall of the second installation groove, and the telescopic end of the second telescopic cylinder is fixedly connected to one side of the translation slider. A horizontally rotating block is movably arranged on the top of the translation slider. An opening groove is formed in the side surface of the horizontally rotating block. One end of the deviation rectifying rod is provided with a connecting block, and the connecting block is vertically hinged in the opening groove.

7. The automatic unwind deviation rectifying device for coating and printing according to claim 6, wherein, A cross pin is arranged at the inner end of the connecting block, and a cross slot for socket matching with the cross pin is arranged at the end of the deviation rectifying rod.

8. The automatic unwind deviation rectifying device for coating and printing according to claim 6, wherein The telescopic direction of the second telescopic cylinder is parallel to the coating direction.

9. A deviation rectification method using the deviation rectification device for automatic unwinding and deviation rectification according to any one of claims 1-8, characterized in that, It includes the following steps: S1: The deviation value of the coating from the preset position is measured in real time by a displacement detection sensor. When the deviation value is greater than the preset deviation threshold, step S2 is executed; otherwise, no deviation rectifying operation is performed. The tension values on both sides of the coating are measured in real time by a tension sensor. When the difference between the tension values on both sides is greater than the preset tension threshold, step S3 is executed; otherwise, no tension balancing operation is performed. S2: Calculate the horizontal deviation angle of one end of the deviation rectifying rod according to the deviation value, and after driving one end of the deviation rectifying rod to perform horizontal deviation adjustment by the deviation rectifying mechanism, execute step S4. S3: Calculate the vertical deviation angle of the other end of the deviation rectifying rod according to the difference between the tension values on both sides, and after driving the other end of the deviation rectifying rod to perform vertical deviation adjustment by the tension balancing mechanism, execute step S4. S4: Repeat step S1 until the deviation value of the coating and the difference between the tension values on both sides of the coating change dynamically within the deviation threshold and the tension threshold respectively.

10. A deviation rectification method using the deviation rectification device for automatic unwinding and deviation rectification described in claim 9, characterized in that, The calculation formula for the horizontal deviation angle is: Among them, θ is the horizontal offset angle, Δx n is the deviation value of coating, L is the length of the deviation correction rod, k is the correction coefficient, and its range is 0.95 - 1.05; The calculation formula for the vertical deviation angle is: Where, φ is the vertical offset angle, ΔT is the difference between the tension values on both sides, and T avg is the average value of the tension values on both sides.

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