Film deviation rectifying device and working method thereof

Abstract

The invention discloses a film deviation rectifying device and a working method thereof, and belongs to the field of coiled material discharging equipment. The device comprises a deviation rectifying mechanism and an unwinding mechanism, the deviation rectifying mechanism adjusts the position of a film on an unwinding assembly, and the deviation rectifying mechanism is installed on an installation roller and a machine body of the unwinding mechanism; the deviation rectifying mechanism comprises a movable annular plate and a fixed annular plate, the fixed annular plate is fixedly mounted on the mounting roller and is close to one side of a sleeve of the unwinding mechanism, the movable annular plate is arranged on the mounting roller in a sleeving manner and is positioned between the fixed annular plate and an annular plate of the unwinding mechanism, and expansion pieces are mounted on one side of the movable annular plate and one side of the fixed annular plate; the expansion pieces are arranged on the installation roller in a sleeving mode, and after a winding roller of the unwinding mechanism is installed on the installation roller, the sleeve moves forwards, so that the sleeve and the annular plate extrude the two expansion pieces at the same time. Meanwhile, the problem that when the film roll is installed, the axis of the film roll and the axis of the installation roller are difficult to coincide, and consequently the tension fluctuation of the film roll in the film transportation process is too large can be solved.

Description

Technical Field

[0001] This invention relates to the field of roll material unloading equipment, and in particular to a film correction device and its working method. Background Technology

[0002] The web guiding system is an automated device composed of a controller, sensors, drivers, and a guiding frame. It uses photoelectric sensors to detect web roll position deviations and, through closed-loop servo control, drives the frame to adjust, achieving edge alignment or center positioning of the web roll. The system works by using infrared / ultrasonic / laser / visible light emitted by the guiding sensors to monitor the web roll's movement and sending signals to the controller. Upon detecting positional drift, the controller, based on pre-set instructions, controls the guiding frame to swing and correct the web roll's position. The automatic web guiding system uses photoelectric sensors to detect the web roll's edge position, sending the measured position error signal to the controller. After processing by the control unit, it controls the drive motor to correct the deviated web roll to the correct position.

[0003] Existing film roll installation methods rely solely on the connection between the installation roller and the inner roll of the film roll. When the installation roller and the roll roll coincide, highly precise installation equipment is required to install them. Otherwise, installation difficulties may arise. When the diameter of the installation roller is smaller than the inner diameter of the roll roll, excessive tension fluctuations will inevitably occur during film transport. Summary of the Invention

[0004] This invention provides a film alignment device and its working method, which can solve the problem that when installing film rolls, the axis of the film roll and the installation roller are difficult to align, resulting in excessive tension fluctuations during film transport.

[0005] One of the objectives of this invention is achieved through the following technical solution: In a first aspect, this application provides a film correction device, including a correction mechanism and an unwinding mechanism, wherein the correction mechanism adjusts the position of the film on the unwinding assembly, and the correction mechanism is mounted on the mounting roller and the machine body of the unwinding mechanism. The correction mechanism includes a movable ring plate and a fixed ring plate. The fixed ring plate is fixedly installed on the mounting roller and close to the sleeve side of the unwinding mechanism. The movable ring plate is sleeved on the mounting roller and located between the fixed ring plate and the annular plate of the unwinding mechanism. An expansion member is installed on one side of both the movable ring plate and the fixed ring plate. The expansion member is sleeved on the mounting roller. After the winding roller of the unwinding mechanism is installed on the mounting roller, the sleeve moves forward, so that the sleeve and the annular plate simultaneously squeeze the two expansion members, causing the two expansion members to expand outward at the same time. The two expansion members fix the two ends of the winding roller. The correction mechanism also includes an adjustment component to adjust the movement of the machine body, thereby adjusting the position of the film.

[0006] A further aspect of the present invention is that the diameter of the movable ring plate is greater than the diameter of the fixed ring plate, and the diameter of the movable ring plate is greater than the inner diameter of the roller and smaller than the diameter of the ends of the roller, while the diameter of the fixed ring plate is smaller than the inner diameter of the roller.

[0007] A further aspect of the present invention is that: the expansion member includes a collar and multiple pads, the collar is sleeved on the mounting roller, the multiple pads are respectively located around the collar, a hinge rod is installed between the collar and the pads, the two ends of the hinge rod are respectively hinged to the collar and the pads, multiple slots are opened on both the movable ring plate and the fixed ring plate, an extension plate is fixedly connected to one side of the pad, the extension plate passes through the slot and slides with the slot, and rollers are installed at the four corners of the extension plate through bearings, the rollers are in contact with one side of the movable ring plate and the fixed ring plate.

[0008] A further aspect of the present invention is that: the adjusting component includes a correction sensor, the correction sensor is located on both sides inside the body, the thin film passes through the correction sensor, an air-bearing guide rail is installed at the bottom of the body, and the air-bearing guide rail is signal-connected to the correction sensor.

[0009] A further aspect of the present invention is that the unwinding includes a machine body and a glue coating machine, the machine body including a mounting roller, a moving assembly, and a pushing assembly; The mounting roller is used to mount the film roll; The two sets of moving components are respectively located above and below the machine body. The mounting roller is mounted on the moving components. When the film roll on the upper mounting roller is about to run out, the moving components drive the upper mounting roller to move downward and at the same time drive the film roll on the lower mounting roller to move upward. After being coated with glue by the glue applicator, the film on the film roll on the lower mounting roller is bonded to the film roll on the upper mounting roller. The two sets of pushing components are respectively located above and below the machine body. The pushing components include pressure rollers. When the film roll on the upper mounting roller is about to run out, the pressure roller moves towards the upper mounting roller and moves directly below the upper mounting roller, driving the film on the film roll on the upper mounting roller to move to the film surface on the lower mounting roller.

[0010] A further aspect of the present invention is that: the moving component includes a threaded rod; two vertically symmetrical fixed long plates are fixedly installed on one side of the machine body; guide rail grooves are provided on the fixed long plates; a moving seat is slidably arranged in the guide rail grooves; sliding grooves are provided on both sides of the fixed long plates; the threaded rod is rotatably disposed in the sliding grooves via bearings; the moving seat is slidably disposed in the sliding grooves on both sides and threadedly connected to the threaded rod; a servo motor is fixedly installed on the fixed long plates; the output end of the servo motor is fixedly connected to one end of the threaded rod; a drive motor is fixedly installed on one side of the moving seat; and an installation roller is rotatably mounted on the moving seat via bearings; the output end of the drive motor is fixedly connected to one end of the installation roller. The moving component also includes a movable seat. Two symmetrical fixed short plates are fixedly installed on the other side of the body. Guide grooves are provided on the fixed short plates. The movable seat is slidably disposed in the guide grooves. A cylinder is fixedly installed on the top of the fixed short plates. The output end of the cylinder extends into the guide groove and is fixedly connected to the movable seat.

[0011] A further aspect of the present invention is that: a winding roller is provided at the axis of the film roll, and both ends of the winding roller are provided with ports, the diameter of which is larger than the diameter of the winding roller; a positioning component for positioning the mounting roller is provided between the movable seat and the movable seat; the positioning component includes an annular plate and a sleeve; the annular plate is fixedly installed on the outer periphery of the mounting roller; a circular hole is provided on one side of the movable seat; the sleeve is slidably disposed in the circular hole; a second cylinder is fixedly connected to one side of the movable seat; the output end of the second cylinder is fixedly connected to one end of the sleeve; the second cylinder drives the sleeve to move forward, thereby driving the film roll to move towards the movable seat, so that the sleeve and the annular plate respectively enter the ports at both ends of the winding roller.

[0012] A further aspect of the present invention is that: the pushing assembly further includes connecting rods, the pressure rollers are disposed between the two connecting rods, and both ends are rotatably connected to the ends of the connecting rods via bearings; guide grooves are provided on both sides of the machine body, and guide plates are slidably disposed in the guide grooves; one end of the connecting rod is hinged to the guide plate; a third cylinder is fixedly installed on the machine body, and the output end of the third cylinder is fixedly connected to the guide plate; the film of the film roll is located between the two pressure rollers.

[0013] A swing motor is fixedly installed on the guide plate, and the output end of the swing motor is fixedly connected to one end of the connecting rod.

[0014] A further aspect of the present invention is that the coating machine includes a motion mechanism and a dispensing head. Before the moving component drives a new film roll for replacement, the motion mechanism drives the dispensing head to apply adhesive to the port of the film on the film roll.

[0015] Secondly, this application provides a method for operating a thin-film correction device, which is applied to the aforementioned thin-film correction device. The method for operating the thin-film correction device includes the following steps: During film roll installation, the film roll is positioned and the inner roller is placed on the installation roller, so that the movable ring plate is located inside the end of the roller and the fixed ring plate is located inside the inner cavity of the roller. The movable ring plate moves the film roll forward. When the film roll is completely moved onto the installation roller and the expansion member on one side of the fixed ring plate is located inside the end, the second cylinder of the unwinding mechanism drives the sleeve to move forward. During the forward movement of the sleeve, the roller moves forward, so that the expansion member on one side of the movable ring plate contacts the ring plate. The sleeve and the ring plate squeeze the two expansion members, thereby fixing the two ends of the roller. During film roll transportation, the position of the film is corrected. When the unwinding mechanism unwinds the film, it adjusts the position of the machine body through the adjusting component, thereby adjusting the position of the film roll and the film during transportation.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The movable ring plate is larger than the inner diameter of the roll and smaller than the diameter of the port, so that the movable ring plate enters the port. The sliding connection between the movable ring plate and the installation roller drives the film roll to move forward. At the same time, since the diameter of the fixed ring plate is smaller than the inner diameter of the roll, the fixed ring plate enters the roll. The cooperation between the two ring plates and the port and inner diameter of the roll facilitates the installation of the film roll.

[0017] (2) The sleeve and the ring plate simultaneously squeeze the collar. When the collar moves forward, the two ends of the hinge rod are hinged to the pad and the collar respectively, and one end of the pad is slidably connected to the movable ring plate and the fixed ring plate. This drives multiple pads to move synchronously to all sides until multiple pads are in contact with the inner wall of the ends of the roller, thereby fixing the roller. Since the length of multiple hinge rods is the same and the collar is in contact with the outer surface of the mounting roller, the axis of the roller coincides with the axis of the mounting roller. Since the two expansion parts are exactly the same, the film roll is in a horizontal state, thus ensuring that the film roll is transported in a horizontal state. The film roll rotates around the mounting roller as the axis, which solves the problem that the axis of the film roll is difficult to coincide with the axis of the mounting roller during installation. This causes the tension of the film roll to fluctuate too much during transportation after the clamping mechanism on the unwinding machine fixes the film roll, which will cause the film to be unbalanced and the smooth film to be mis-layered due to inertial slippage. Attached Figure Description

[0018] Figure 1 This is one of the overall structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the front internal structure of the fuselage of the present invention; Figure 4 This is a schematic diagram of the internal rear structure of the fuselage of the present invention; Figure 5 This is a schematic diagram of the pushing component structure of the present invention; Figure 6 This is a schematic diagram of the tension adjustment mechanism of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure of section A; Figure 8 This is a schematic diagram of the positioning component structure of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of section B in the middle; Figure 10 For the present invention Figure 8 Schematic diagram of the C-section structure; Figure 11 This is a schematic diagram of the expansion component structure of the present invention; Figure 12 For the present invention Figure 11 Schematic diagram of the structure of section D.

[0019] In the diagram: 1. Machine body; 2. Glue applicator; 21. Motion mechanism; 22. Dispensing head; 3. Film roll; 31. Roller; 32. Port; 100. Mounting roller; 200. Moving assembly; 201. Threaded rod; 202. Fixed long plate; 203. Guide rail groove; 204. Moving seat; 205. Sliding groove; 206. Servo motor; 207. Drive motor; 208. Movable seat; 209. Fixed short plate; 210. Guide groove; 211. Cylinder No. 1; 300. Pushing assembly; 301. Pressure roller; 302. Connecting rod; 303. Guide groove; 304. Guide plate; 305. Swing motor; 306. Cylinder No. 3; 400. Positioning assembly; 401. Ring 402. Shaped plate; 403. Sleeve; 404. Cylinder No. 2; 505. Tension adjustment mechanism; 506. Upper tension detection roller; 507. Lower tension detection roller; 508. Elastic telescopic rod; 509. Transverse groove; 500. Extension rod; 501. Cylinder No. 4; 502. Swing motor; 503. Arc groove; 504. Extension rod; 515. Sleeve rod; 516. Tension sensor; 607. Correction mechanism; 608. Movable ring plate; 609. Fixed ring plate; 610. Expansion piece; 611. Collar ring; 612. Pad; 613. Hinge rod; 614. Extension plate; 615. Roller; 620. Adjusting piece; 621. Correction sensor; 622. Air-bearing guide rail. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] Example 1

[0022] like Figures 1 to 5 As shown, an embodiment of the present invention provides a film unwinding mechanism, including a machine body 1 and a coating machine 2. The machine body 1 includes a mounting roller 100, a moving component 200 and a pushing component 300. Mounting roller 100 is used to mount film roll 3; Two sets of moving components 200 are respectively located above and below the machine body 1. The mounting roller 100 is mounted on the moving components 200. When the film roll 3 on the upper mounting roller 100 is about to run out, the moving components 200 drive the upper mounting roller 100 to move downward, and at the same time drive the film roll 3 on the lower mounting roller 100 to move upward. After being coated with glue by the glue applicator 2, the film on the film roll 3 on the lower mounting roller 100 is bonded to the film on the film roll 3 on the upper mounting roller 100. Two sets of pushing components 300 are respectively located above and below the machine body 1. The pushing component 300 includes a pressure roller 301. When the film roll 3 on the upper mounting roller 100 is about to run out, the pressure roller 301 moves towards the upper mounting roller 100 and moves to directly below the upper mounting roller 100.

[0023] When the film roll 3 on the mounting roller 100 above the machine body 1 is about to be exhausted, the difference in diameter between the initial state and the state of exhaustion of the film roll 3 causes the film between the end of the mounting roller 100 and the end of the pressure roller 301 to be in an inclined state. At this time, the moving component 200 above the machine body 1 drives the upper mounting roller 100 to move downward, and at the same time pushes the pressure roller 301 in the component 300 to move towards the mounting roller 100. When the pressure roller 301 moves directly below the old film roll 3, the lower moving component 200 drives the new film roll 3 to move upward. At the designated position, and during the movement, the dispensing machine applies adhesive to the film interface of the new film roll 3. When the new film roll 3 moves to the designated position, the adhesive-coated film interface of the new film roll 3 adheres to the film at the bottom of the pressure roller 301. After adhesion, the film on the old film roll 3 is exhausted, so that the film on the old film roll 3 is continuously replaced. When the film replacement between the old film roll 3 and the new film roll 3 is completed, the moving component 200 drives the old film roll 3 to move upward to facilitate the replacement of the old film roll 3, and at the same time, the pressure roller 301 above resets.

[0024] Traditional unwinding machines require stopping the machine to replace film roll 3. This involves a series of steps, including swapping the positions of the old and new film roll 3, hot-melt bonding, and cutting the film roll 3. This process is complex and inefficient. Furthermore, cutting the old film roll 3 leaves some film roll 3 residue on each roll, resulting in material waste. Another method is continuous replacement. However, this process can easily cause excessive tension on the film, leading to film damage and excessive distance between the old and new film roll 3. As a result, after the old film roll 3 is released, a long section of film becomes wrinkled or curled. This leads to a long, irregular stretch of film thickness after the old and new film roll 3 are bonded together.

[0025] In contrast, this application sets two sets of film rolls 3 on the machine body 1. When the old film roll 3 is about to be exhausted, it moves downward. To prevent the film from loosening during the movement, the pressure roller 301 moves towards the old film roll 3, so that the film is still in a taut state. At the same time, due to the diameter difference between the original state and the state when the film roll 3 is about to be fully released, when the film on the old film roll 3 is about to be fully released, the pressure roller 301 adjusts the film tension and moves directly below the old film roll 3. After the pressure roller 301 stabilizes, the glue applicator 2 applies glue to the new film roll 3 and drives the new film roll 3 to move upward through the moving component 200, so that the film on the new film roll 3 is bonded to the film on the old film roll 3, thereby completing the uninterrupted replacement between the old and new film rolls 3. Thus, this invention can quickly realize the replacement of the old and new film rolls 3 without stopping the unwinding machine.

[0026] Since the old and new film rolls 3 are in a parallel and vertical position in this invention, when replacing the old and new film rolls 3, because the initial diameter of the unwinding machine's film roll 3 is too large, in order to maximize the amount of film wound on the winding roller 31, the thickness of its winding roller 31 will not be too thick. As the film on the film roll 3 continues to be output outward, its diameter will continuously decrease. When the film on the old film roll 3 is about to be consumed, the diameter of the old film roll 3 is much smaller than the initial diameter. When the old film roll 3 moves downward to the bottom end through the moving component 200, it is subjected to the influence of the old film roll 3... Due to the limitation of the roller 31, the film unwound from the old film roll 3 can never be properly bonded to the top of the new film roll 3 when it reaches the designated position. As the new film roll 3 continues to move upward to meet the old film roll 3, the tension of the new film roll 3 will change after the old and new film rolls 3 are replaced. At this time, it is necessary to re-detect the tension of the film roll 3 by the tension sensor 511 and reset the tension adjustment zone value. In addition, the position of the new film roll 3 also needs to be readjusted, which is complicated. Therefore, it is necessary to use the movement of the pressure roller 301 to bond the old and new film rolls 3.

[0027] See also Figures 1 to 4As shown, the moving component 200 includes a threaded rod 201. Two vertically symmetrical fixed long plates 202 are fixedly installed on one side of the machine body 1. The fixed long plates 202 have guide rail grooves 203. A moving seat 204 is slidably installed in the guide rail grooves 203. Sliding grooves 205 are opened on both sides of the fixed long plates 202. The threaded rod 201 is rotatably disposed in the sliding grooves 205 through bearings. The moving seats 204 are slidably disposed in the sliding grooves 205 on both sides and are threadedly connected to the threaded rod 201. A servo motor 206 is fixedly installed on the fixed long plates 202. The output end of the servo motor 206 is fixedly connected to one end of the threaded rod 201. A drive motor 207 is fixedly installed on one side of the moving seat 204. An installation roller 100 is rotatably mounted on the moving seat 204 through bearings. The output end of the drive motor 207 is fixedly connected to one end of the installation roller 100. When controlling the film roll 3 to move up and down, the servo motor 206 drives the threaded rod 201 to rotate. Through the threaded connection between the threaded rod 201 and the moving seat 204, the moving seat 204 is driven to move up and down, thereby controlling the movement of the film roll 3 installed on the mounting roller 100 on the fixed long plate 202.

[0028] See also Figures 1 to 4 as well as Figures 9 to 11 As shown, when controlling the rotation of the membrane roll 3, the other end of the membrane roll 3 needs to be fixed. The moving assembly 200 also includes a movable seat 208. Two vertically symmetrical fixed short plates 209 are fixedly installed on the other side of the machine body 1. The fixed short plates 209 are provided with guide grooves 210. The movable seat 208 is slidably disposed in the guide grooves 210. A cylinder 211 is fixedly installed on the top of the fixed short plate 209. The output end of the cylinder 211 extends into the guide grooves 210 and is fixedly connected to the movable seat 208. A winding roller 31 is provided at the axis of the membrane roll 3. Both ends of the winding roller 31 are provided with ports 32. The diameter of the ports 32 is larger than the diameter of the winding roller 31. The moving seat 208 is also provided with guide grooves 210. A positioning component 400 for positioning the mounting roller 100 is provided between the 4 and the movable seat 208. The positioning component 400 includes an annular plate 401 and a sleeve 402. The annular plate 401 is fixedly installed on the outer periphery of the mounting roller 100. A circular hole is opened on one side of the movable seat 208. The sleeve 402 is slidably disposed in the circular hole. A second cylinder 403 is fixedly connected to one side of the movable seat 208. The output end of the second cylinder 403 is fixedly connected to one end of the sleeve 402. The second cylinder 403 drives the sleeve 402 to move forward, driving the film roll 3 to move towards the movable seat 204, so that the sleeve 402 and the annular plate 401 respectively enter the ports 32 at both ends of the roller 31. When the moving component 200 moves the film roll 3 to the designated position, the second cylinder 403 moves the sleeve 402 forward, so that the sleeve 402 and the annular plate 401 simultaneously enter the ports 32 at both ends of the roller 31, thereby fixing the two ends of the film roll 3. When the drive motor 207 drives the mounting roller 100 to rotate, since the sleeve 402 and the annular plate 401 are both located in the ports 32 at both ends of the roller 31, the rotation of the mounting roller 100 drives the annular plate 401 to rotate, thereby driving the film roll 3 to rotate. Meanwhile, in order to drive the membrane roll 3 downward when it is about to run out, a fixed short plate 209 is installed on the other side of the machine body 1, and the movable seat 208 is slidably disposed in the guide groove 210 in the fixed short plate 209. When the membrane roll 3 is about to run out and needs to move downward, the membrane roll 3 is driven downward through the threaded connection between the movable seat 204 and the threaded rod 201 in the movable component 200, and the setting of the output end of the first cylinder 211 being installed on the top of the movable seat 208. Both ends move downward at the same time, ensuring the stability of the membrane roll 3 when it moves downward. Simultaneously, the setting to move downwards when membrane roll 3 is about to be exhausted is to reduce the area of ​​wrinkles or curling between the two layers of film during the replacement of old and new membrane roll 3. Traditional non-stop membrane roll 3 replacement methods require rotating the old roll backward while the new roll rotates forward and positions itself in the old roll's place, allowing the films to adhere and enabling uninterrupted replacement. However, due to the size of the rolls themselves and the need for rotation, a significant distance inevitably exists between the two rolls. Because of this large gap, when the old roll is fully released, a section of film between the old and new rolls lacks support, causing elastic shrinkage or plastic deformation, resulting in wrinkles or curling. When this wrinkled or curled film adheres to the film between the new roll, it leads to problems such as increased film thickness in this section. In this application, after the old film roll 3 moves downward, the distance between the old film roll 3 and the pressure roller 301 is reduced. This makes the length of the joint between the two films during the replacement process between the old and new film rolls 3 much smaller than the length of the joint between the two films when the old film roll 3 is in its original position. This minimizes the area of ​​wrinkles or curls between the two films during the replacement of the old and new film rolls 3.

[0029] See also Figures 5 to 6As shown, in order to realize the movement of the pressure roller 301, the pushing assembly 300 also includes a connecting rod 302. The pressure roller 301 is located between the two connecting rods 302, and both ends are rotatably connected to the ends of the connecting rods 302 through bearings. Guide grooves 303 are provided on both sides of the machine body 1. Guide plates 304 are slidably provided in the guide grooves 303. One end of the connecting rod 302 is hinged to the guide plate 304. A No. 3 cylinder 306 is fixedly installed on the machine body 1. The output end of the No. 3 cylinder 306 is fixedly connected to the guide plate 304. The film of the film roll 3 is located between the two pressure rollers 301. A swing motor 305 is fixedly installed on the guide plate 304. The output end of the swing motor 305 is fixedly connected to one end of the connecting rod 302. The pressure roller 301 is driven to move towards the film roll 3 by the cylinder 306. In order to avoid the film being damaged due to excessive tension during the movement of the pressure roller 301, the connecting rod 302 is hinged to the guide plate 304. The connecting rod is driven to swing by the swing motor 305 to give the film an adaptive tension. When the pressure roller 301 moves directly under the old film roll 3, the swing motor causes the swing amplitude of the film to tend to stabilize. Then the new film roll 3 moves upward and overlaps with the film at the bottom of the pressure roller 301.

[0030] See also Figure 1 As shown, in order to bond the film interface on the new film roll 3 to the film on the old film roll 3, the glue applicator 2 includes a motion mechanism 21 and a dispensing head 22. Before the moving component 200 drives the new film roll 3 for replacement, the motion mechanism 21 drives the dispensing head 22 to apply glue to the film interface on the film roll 3. The glue outlet of the dispensing head 22 is set to be rotatable, so as to facilitate applying glue to the top and bottom film rolls 3 respectively. This application does not limit the specific structure of the glue applicator 2. The specific structure and working principle of the glue applicator 2 are all prior art and will not be described in detail here.

[0031] Example 2

[0032] The film tension adjustment on the unwinding machine involves the tension detection roller measuring the film tension in real time via the tension sensor 511 on its bearing housing, converting the physical tension into an electrical signal. These signals are sent to the tension regulator or PLC controller, compared with a preset tension value, and the error signal is calculated using a PID algorithm. Based on this, the output of the drive motor 207 is adjusted, for example, by changing its speed or torque, to dynamically compensate for tension fluctuations. When the unwinding machine changes film roll 3, the tension generated by the movement of the pressure roller 301 and the loosening caused by the movement of the old film roll 3 to the new film roll 3 will cause significant changes in the tension of the film during transportation. Compared to traditional tension adjustment, which only adjusts the speed of the drive motor 207 by coordinating the tension detection roller and the tension sensor to compensate for tension fluctuations, it is difficult to handle tension fluctuations caused by large tensioning or loosening of the film.

[0033] like Figures 6 to 7 As shown, an embodiment of the present invention provides a film tension adjustment mechanism, including a tension adjustment mechanism 500, which adjusts the tension of the film on the unwinding assembly. The tension adjustment mechanism 500 is installed on the body 1 of the unwinding mechanism. The tension adjustment mechanism 500 includes an upper tension detection roller 501 and a lower tension detection roller 502. The upper tension detection roller 501 is located above the lower tension detection roller 502. The film is attached to the right side of the upper tension detection roller 501, passes between the upper tension detection roller 501 and the lower tension detection roller 502, is attached to the left side of the lower tension detection roller 502, and extends outward from the bottom of the lower tension detection roller 502. When the unwinding mechanism changes rolls, the upper tension detection roller 501 moves in the direction of film advance to maintain the film in a taut state. After the unwinding mechanism changes rolls, the upper tension detection roller 501 resets and adjusts the tension of the film through the lower tension detection roller 502 to keep the film in a constant tension state. As the old film roll 3 continues to move downwards, the film as a whole is in a loose state throughout the transportation process. At this time, it is difficult to quickly restore the tension of the film by adjusting the speed of the drive motor 207. As a result, when the rewinding machine rewinds the film roll 3, the film roll 3 will become loose. When the upper tension detection roller 501 detects a change in the surface tension of the film, it does not change the speed of the drive motor 207, but controls the tension detection roller itself to move in the direction of the film's forward movement, thereby quickly adjusting the tension of the film and compensating for the tension fluctuations of the film during transportation. Meanwhile, the old film roll 3 continues to move downwards, and the pressure roller 301 moves synchronously in the direction of the pressure roller 301. Since the speed and distance of the two are different, the tension of the film will fluctuate during the movement. Since the old film roll 3 and the new film roll 3 are replaced without interval, the rotation speed of the new film roll 3 remains unchanged. The old film roll 3 will change its rotation speed due to the fluctuation of the film tension. When the rotation speed of the old film roll 3 is faster than that of the new film roll 3, misalignment occurs when the two are bonded. As a result, the adhesive on the film interface of the new film roll 3 overflows to a position outside the bonding area during the misalignment, which leads to adhesion problems between the two layers of film during subsequent winding. When the rotation speed of the old film roll 3 is slower than that of the new film roll 3, after they are bonded together, the new film roll 3 rotates faster, which can cause the film of the old film roll 3 to loosen during transportation. This can lead to uneven winding density during subsequent winding. Therefore, it is necessary to ensure that the rotation speeds of the old and new film rolls 3 are the same during the replacement process. Thus, while the upper tension detection roller 501 quickly adjusts the film tension, a lower tension detection roller 502 is set up. The lower tension detection roller 502 detects the changes in film tension and swings up and down to adjust, in order to compensate for the fluctuations in film tension during transportation, thereby ensuring that the old film roll 3 can maintain a synchronous speed with the new film roll 3 during rotation.

[0034] See also Figures 6 to 7 As shown, in order to quickly adjust the tension changes caused by the film being stretched or loosened, and to give the film an adaptive tension during the adjustment process, the tension adjustment mechanism 500 also includes an elastic telescopic rod 503. A transverse groove 504 is provided on the machine body 1. Extension rods 505 are fixedly connected to both ends of the upper tension detection roller 501. The extension rods 505 are slidably disposed in the transverse groove 504 and one end extends to the outside of the machine body 1. One end of the elastic telescopic rod 503 is rotatably connected to the extension rod 505 through a bearing. A No. 4 cylinder 506 is fixedly installed on the machine body 1. The output end of the No. 4 cylinder 506 is fixedly connected to one end of the elastic telescopic rod 503. When the old film roll 3 moves toward the new film roll 3, it causes the film to loosen during transport. Since the film is attached to the upper tension detection roller 501 from the right side, in order to ensure rapid adjustment of the film tension, the fourth cylinder 506 drives the upper tension detection roller 501 to move to the right, thereby applying a tension to the film and quickly adjusting the tension change caused by the loosening of the film. When the pressure roller 301 moves toward the old film roll 3, it causes the film to be over-stretched during transport. In order to ensure the adjustment of the film tension, the fourth cylinder 506 drives the upper tension detection roller 501 to move to the left, thereby relieving the tension of the film and quickly adjusting the tension change caused by the film being stretched.

[0035] See also Figures 6 to 7 As shown, in order to ensure that the speed of the old film roll 3 remains constant during movement and to adjust for small-range tension changes in the film, the tension adjustment mechanism 500 also includes a swing motor 507. A vertical arc-shaped groove 508 is provided on the machine body 1. Extension rods 509 are fixedly connected to both ends of the lower tension detection roller 502. The extension rods 509 are slidably disposed in the arc-shaped groove 508 and one end extends to the outside of the machine body 1. One end of the extension rod 509 is rotatably connected to a sleeve rod 510 through a bearing. The swing motor 507 is fixedly installed on the machine body 1. The output end of the swing motor 507 is fixedly connected to one end of the sleeve rod 510, driving the lower tension detection roller 502 to swing up and down. In order to ensure that the rotation speed of the old and new film rolls 3 is the same when they are replaced, the rotation speed of the old film roll 3 cannot be adjusted to compensate for tension fluctuations. Therefore, the swing motor 507 drives the lower tension detection roller 502 to swing back and forth at a small angle to compensate for the tension fluctuations of the film and precisely adjust the tension changes of the film.

[0036] See also Figures 6 to 7As shown, the tension adjustment mechanism 500 also includes a tension sensor 511, which is mounted on the extension rod 509 and the extension rod 505 respectively. The tension sensor 511 is connected to the upper tension detection roller 501 and the lower tension detection roller 502 via signal connection. The tension detection roller is usually a guide roller or idler roller. When the film passes through the roller, tension is applied to it. The tension sensor 511 is directly integrated or mounted on the support structure of the tension detection roller, i.e., the extension rod 509 and the extension rod 505. It indirectly reflects the material tension by measuring the force on the roller shaft or bearing. The material tension acts on the tension detection roller, and the tension sensor 511 converts the mechanical force into an electrical signal. The electrical signal output by the tension sensor 511 is amplified and converted by the electronic circuit and sent to the tension controller. The controller compares the set value with the actual value through a PID algorithm and dynamically adjusts the braking system such as the fourth cylinder 506 and the swing motor to maintain the tension stability of the film. This application does not limit the specific structure of the tension sensor 511 and the tension detection roller. The specific structure and working principle of the tension sensor 511 and the tension detection roller are existing technologies and will not be described in detail here. Example 3 The web guiding device on the unwinding machine monitors the movement of the web material by emitting visible light through a web guiding sensor, and sends the signal to the controller. After the controller detects a positional drift in the film roll, it controls the correction frame to swing and correct the roll position according to the pre-set instructions. Traditional correction devices only correct the film position during transportation. However, the positional deviation of the film during transportation is not only due to the deviation of the two sides of the film. When the film roll 3 is installed, if the axis of the film roll 3 does not coincide with the axis of the installation roller 100, the clamping mechanism on the unwinding machine will fix the film roll 3. This will cause excessive tension fluctuations during transportation, resulting in an imbalance of forces on the film. The existing film roll 3 installation is only performed by the sleeve between the installation roller 100 and the inner winding roller 31 of the film roll 3. When the installation roller 100 and the winding roller 31 coincide, very precise installation equipment is required to install them. Otherwise, it will be difficult to install them. When the diameter of the installation roller 100 is smaller than the inner diameter of the winding roller 31, excessive tension fluctuations will inevitably occur during the transportation of the film roll 3.

[0037] like Figures 8 to 12 As shown, an embodiment of the present invention provides a film correction device, including a correction mechanism 600, which adjusts the position of the film on the unwinding mechanism. The correction mechanism 600 is installed on the mounting roller 100 of the unwinding mechanism and the machine body 1. The correction mechanism 600 includes a movable ring plate 601 and a fixed ring plate 602. The fixed ring plate 602 is fixedly installed on the mounting roller 100 and close to the sleeve 402 of the unwinding mechanism. The movable ring plate 601 is sleeved on the mounting roller 100 and located between the fixed ring plate 602 and the annular plate 401 of the unwinding mechanism. An expansion member 610 is installed on one side of both the movable ring plate 601 and the fixed ring plate 602. The expansion member 610 is sleeved on the mounting roller 100. After the winding roller 31 of the unwinding mechanism is installed on the mounting roller 100, the sleeve 402 moves forward, so that the sleeve 402 and the annular plate 401 simultaneously squeeze the two expansion members 610, so that the two expansion members 610 expand outward at the same time, and the two expansion members 610 fix the two ends of the winding roller 31. The correction mechanism 600 also includes an adjustment element 620, which adjusts the movement of the machine body 1, thereby adjusting the position of the film.

[0038] See also Figures 8 to 12 As shown, to ensure that the axis of the film roll 3 coincides with the axis of the mounting roller 100 during installation and to enable rapid installation of the film roll 3, the diameter of the movable ring plate 601 is larger than the diameter of the fixed ring plate 602. The diameter of the movable ring plate 601 is larger than the inner diameter of the roller 31 but smaller than the diameter of the ports 32 at both ends of the roller 31. The diameter of the fixed ring plate 602 is smaller than the inner diameter of the roller 31. The expansion member 610 includes a collar 611 and multiple pads 612. The collar 611 is fitted onto the mounting roller 100, and the multiple pads 612... 12 are located around the collar 611. A hinge rod 613 is installed between the collar 611 and the pad 612. The two ends of the hinge rod 613 are hinged to the collar 611 and the pad 612 respectively. Multiple slots are opened on both the movable ring plate 601 and the fixed ring plate 602. An extension plate 614 is fixedly connected to one side of the pad 612. The extension plate 614 passes through the slot and slides with the slot. Rollers 615 are installed at the four corners of the extension plate 614 through bearings. The rollers 615 are in contact with one side of the movable ring plate 601 and the fixed ring plate 602. When installing the film roll 3, since both ends of the roller 31 have ports 32, and the diameter of the ports 32 is larger than the diameter of the roller 31, the movable ring plate 601 enters the port 32 during installation because its diameter is larger than the inner diameter of the roller 31 and smaller than the diameter of the ports 32. Through the sliding connection between the movable ring plate 601 and the installation roller 100, the film roll 3 moves forward. Simultaneously, since the diameter of the fixed ring plate 602 is smaller than the inner diameter of the roller 31, the fixed ring plate 602 enters the roller 31. Inside, the fit between the two annular plates and the port 32 and inner diameter of the roller 31 facilitates the installation of the film roll 3. When the film roll 3 continues to move forward and the expansion member 610 on one side of the movable annular plate 601 contacts the annular plate 401 on the mounting roller 100, the film roll 3 stops moving forward and is driven downward by the moving assembly 200, so that the other end of the film roll 3 is located on the side of the sleeve 402. Then, the second cylinder 403 drives the sleeve 402 to move forward, so that the sleeve 402 and the annular plate 401 simultaneously engage the collar 61. 1. During compression, when the collar 611 moves forward, the hinge rod 613 is hinged to the pad 612 and the collar 611 at both ends, and one end of the pad 612 is slidably connected to the movable ring plate 601 and the fixed ring plate 602. This causes multiple pads 612 to move synchronously in all directions until they are in contact with the inner walls of the ports 32 at both ends of the roller 31, thus fixing the roller 31. Since the multiple hinge rods 613 are of the same length and the collar 611 is in contact with the outer surface of the mounting roller 100, the roller 31 is thus secured. The axis of roller 31 coincides with the axis of mounting roller 100. Since the two expansion members 610 are exactly the same, the film roll 3 is in a horizontal state, thus ensuring that the film roll 3 is transported in a horizontal state. The film roll 3 rotates around the mounting roller 100 as the axis, which solves the problem that the axis of the film roll 3 is difficult to coincide with the axis of the mounting roller 100 during installation. This would cause the clamping mechanism on the unwinding machine to fix the film roll 3, resulting in excessive tension fluctuations during transportation and causing the film to be unbalanced in force.

[0039] See also Figure 6As shown, for the purpose of adjusting the position of the film during transportation, the adjusting component 620 includes a correction sensor 621. The correction sensors 621 are located on both sides inside the machine body 1. The film passes through the correction sensors 621. An air-bearing guide rail 622 is installed at the bottom of the machine body 1. The air-bearing guide rail 622 is connected to the correction sensor 621 by signal. The correction sensor emits visible light to monitor the movement of the film and sends the signal to the controller. After the controller detects that the film has a positional drift, it controls the correction frame to swing through the air-bearing guide rail 622 to correct the position of the roll material according to the instructions preset by the controller. This application does not limit the specific structure of the correction sensor 621 and the air-bearing guide rail 622. The specific structure and working principle of the correction sensor 621 and the air-bearing guide rail 622 are all prior art and will not be described in detail here.

[0040] Example 4

[0041] A film tension adjustment device consists of an unwinding mechanism and a tension adjustment mechanism 500.

[0042] Example 5

[0043] A film correction device consists of an unwinding mechanism and a correction mechanism 600.

[0044] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A thin-film correction device, characterized in that, It includes a web-correcting mechanism that adjusts the position of the film on the unwinding assembly. The web-correcting mechanism is mounted on the mounting roller and the machine body of the unwinding mechanism. The correction mechanism includes a movable ring plate and a fixed ring plate. The fixed ring plate is fixedly installed on the mounting roller and close to the sleeve side of the unwinding mechanism. The movable ring plate is sleeved on the mounting roller and located between the fixed ring plate and the annular plate of the unwinding mechanism. An expansion member is installed on one side of both the movable ring plate and the fixed ring plate. The expansion member is sleeved on the mounting roller. After the winding roller of the unwinding mechanism is installed on the mounting roller, the sleeve moves forward, so that the sleeve and the annular plate simultaneously squeeze the two expansion members, causing the two expansion members to expand outward at the same time. The two expansion members fix the two ends of the winding roller. The correction mechanism also includes an adjustment component to adjust the movement of the machine body, thereby adjusting the position of the film.

2. The thin-film correction device according to claim 1, characterized in that, The diameter of the movable ring plate is greater than the diameter of the fixed ring plate, and the diameter of the movable ring plate is greater than the inner diameter of the roller and smaller than the diameter of the ends of the roller. The diameter of the fixed ring plate is smaller than the inner diameter of the roller.

3. The thin-film correction device according to claim 1, characterized in that, The expansion member includes a collar and multiple pads. The collar is sleeved on the mounting roller, and the multiple pads are located around the collar. A hinge rod is installed between the collar and the pads, and the two ends of the hinge rod are respectively hinged to the collar and the pads. Multiple slots are opened on both the movable ring plate and the fixed ring plate. An extension plate is fixedly connected to one side of the pad. The extension plate passes through the slot and slides with the slot. Rollers are installed at the four corners of the extension plate through bearings. The rollers are in contact with one side of the movable ring plate and the fixed ring plate.

4. The thin-film correction device according to claim 1, characterized in that, The adjustment component includes a correction sensor, which is located on both sides inside the body. A thin film passes through the correction sensor. An air-bearing guide rail is installed at the bottom of the body and is connected to the correction sensor via a signal.

5. A thin-film correction device according to any one of claims 1-4, characterized in that, It also includes an unwinding mechanism, which includes a machine body and a glue applicator, the machine body including a mounting roller, a moving assembly and a pushing assembly; The mounting roller is used to mount the film roll; The two sets of moving components are respectively located above and below the machine body. The mounting roller is mounted on the moving components. When the film roll on the upper mounting roller is about to run out, the moving components drive the upper mounting roller to move downward and at the same time drive the film roll on the lower mounting roller to move upward. After being coated with glue by the glue applicator, the film on the film roll on the lower mounting roller is bonded to the film roll on the upper mounting roller. The two sets of pushing components are respectively located above and below the machine body. The pushing components include pressure rollers. When the film roll on the upper mounting roller is about to run out, the pressure roller moves towards the upper mounting roller and moves directly below the upper mounting roller, driving the film on the film roll on the upper mounting roller to move to the film surface on the lower mounting roller.

6. The thin-film correction device according to claim 1, characterized in that, The moving component includes a threaded rod. Two symmetrical fixed long plates are fixedly installed on one side of the machine body. The fixed long plates have guide rail grooves, and a moving seat is slidably arranged in the guide rail grooves. Sliding grooves are opened on both sides of the fixed long plates. The threaded rod is rotatably disposed in the sliding grooves through bearings. The moving seats are slidably disposed in the sliding grooves on both sides and are threadedly connected to the threaded rod. A servo motor is fixedly installed on the fixed long plates. The output end of the servo motor is fixedly connected to one end of the threaded rod. A drive motor is fixedly installed on one side of the moving seat. The mounting roller is rotatably mounted on the moving seat through bearings. The output end of the drive motor is fixedly connected to one end of the mounting roller. The moving component also includes a movable seat. Two symmetrical fixed short plates are fixedly installed on the other side of the body. Guide grooves are provided on the fixed short plates. The movable seat is slidably disposed in the guide grooves. A cylinder is fixedly installed on the top of the fixed short plates. The output end of the cylinder extends into the guide groove and is fixedly connected to the movable seat.

7. A thin-film correction device according to claim 1, characterized in that, A winding roller is provided at the axis of the film roll, and both ends of the winding roller have ports with a diameter larger than that of the winding roller. A positioning component for positioning the mounting roller is provided between the movable seat and the movable seat. The positioning component includes an annular plate and a sleeve. The annular plate is fixedly installed on the outer circumference of the mounting roller. A circular hole is provided on one side of the movable seat, and the sleeve is slidably disposed in the circular hole. A second cylinder is fixedly connected to one side of the movable seat. The output end of the second cylinder is fixedly connected to one end of the sleeve. The second cylinder drives the sleeve to move forward, which in turn drives the film roll to move towards the movable seat, so that the sleeve and the annular plate enter the ports at both ends of the winding roller respectively.

8. A thin-film correction device according to claim 1, characterized in that, The pushing assembly also includes connecting rods. The pressure rollers are located between the two connecting rods, and both ends are rotatably connected to the ends of the connecting rods via bearings. Guide grooves are provided on both sides of the machine body, and guide plates are slidably arranged in the guide grooves. One end of the connecting rod is hinged to the guide plate. A No. 3 cylinder is fixedly installed on the machine body, and the output end of the No. 3 cylinder is fixedly connected to the guide plate. The film of the film roll is located between the two pressure rollers. A swing motor is fixedly installed on the guide plate, and the output end of the swing motor is fixedly connected to one end of the connecting rod.

9. A thin-film correction device according to claim 1, characterized in that, The coating machine includes a motion mechanism and a dispensing head. Before the moving component drives a new film roll to be replaced, the motion mechanism drives the dispensing head to apply adhesive to the port of the film on the film roll.

10. A method for operating a thin-film correction device, characterized in that: The specific steps of using a thin-film polarization correction device as described in any one of claims 1-9 are as follows: During film roll installation, the film roll is positioned and the inner roller is placed on the installation roller, so that the movable ring plate is located inside the end of the roller and the fixed ring plate is located inside the inner cavity of the roller. The movable ring plate moves the film roll forward. When the film roll is completely moved onto the installation roller and the expansion member on one side of the fixed ring plate is located inside the end, the second cylinder of the unwinding mechanism drives the sleeve to move forward. During the forward movement of the sleeve, the roller moves forward, so that the expansion member on one side of the movable ring plate contacts the ring plate. The sleeve and the ring plate squeeze the two expansion members, thereby fixing the two ends of the roller. During film roll transportation, the position of the film is corrected. When the unwinding mechanism unwinds the film, it adjusts the position of the machine body through the adjusting component, thereby adjusting the position of the film roll and the film during transportation.

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