A stripping rewinder and a stripping method

Abstract

The application discloses a peeling rewinder and a peeling method. A main traction assembly of the composite roll is arranged upstream of a nominal peeling point, paper side and film side branch traction assemblies are arranged downstream thereof, and three tension detection members are respectively used for adjusting the unwinding side, paper side and film side tension. The peeling film guide roller moves along an arc track with the moving seat and with the nominal peeling point as the center. The control unit preferentially executes local tension adjustment, executes position correction only when the actual peeling point continuously exceeds the allowed interval to reach a preset duration or exceeds a second threshold, and coordinates the far-end winding according to the floating compensation roller position and the roll diameter. The application can isolate the unwinding and winding disturbance, reduce the angle adjustment tension impact and control oscillation, and improve the continuous peeling and separate rewinding stability.

Description

Technical Field

[0001] This invention relates to the field of continuous roll peeling and rewinding equipment, and in particular to a peeling and rewinding machine and peeling method for continuously separating and rewinding paper substrates from carrier films, transfer films, protective films or other peelable film layers. Background Technology

[0002] After coating, lamination, curing, or transfer treatment, paper-film composite rolls such as transfer paper, metallized paper, packaging paper, and decorative paper typically need to be rewound. At the peel point, the paper substrate and peelable film layer are continuously separated, forming a paper substrate roll and a reclaimed film roll respectively. During the peeling process, the unwinding diameter, the paper substrate winding diameter, and the peelable film winding diameter continuously change, causing variations in the required rotational speed and torque of each reel. Tension fluctuations generated at the far end of the reel can easily be transmitted along the roll path to the peeling point.

[0003] Chinese patent CN201914760U discloses a film peeling and rewinding machine. The raw material roll is released by a feeding air shaft, peeled by guide rollers, and then rewound separately. Magnetic powder control and tapered tension control are used to adapt to changes in roll diameter. This solution can complete film peeling and rewinding, but its tension control mainly acts on the feeding and rewinding shafts. It does not set traction boundaries near the peeling point on two branches downstream of the peeling point, nor does it address constant path peeling angle adjustment based on the peeling point's geometric reference or delamination correction based on the peeling point's position.

[0004] Existing peeling and rewinding equipment typically uses an unwinding shaft, a peeling roller, and two remote winding shafts to form a conveying path, and maintains tension through a swing roller, tension sensor, or winding torque control. Because the paper substrate and the peeling film are coupled at the peeling point, changes in winding tension on one side can easily alter the peeling state on the other side, resulting in the actual peeling point moving along the surface of the peeling roller, paper wrinkling or fuzzing, film breakage, localized unpeeled areas, and uneven rewinding tension.

[0005] Furthermore, conventional peel angle adjustment mechanisms typically change the output direction of the peel film by linearly moving the guide roller. This action simultaneously alters the effective path length between the nominal peel point and the guide roller, causing the film tension to rise or fall instantaneously during adjustment. If tension adjustment, peel point correction, and remote winding control employ similar response speeds, multiple actuators may engage in mutual tracking and control oscillations. Therefore, a peeling and rewinding machine and peeling method are needed that can isolate disturbances on the unwinding and remote winding sides, suppress path length changes when the peel angle is altered, and coordinate control across different time scales.

[0006] In continuous roll forming, tension is not solely determined by the output torque of a single take-up shaft, but is related to the roll's elasticity, roller friction, clamping condition, roll diameter, acceleration / deceleration inertia, and the free length of each section of the roll. When the composite roll splits into two branches at the peel point, the material thickness, elastic modulus, and winding radius of the two branches are usually different. Therefore, even if both take-up shafts use the same speed control method, different tension dynamics will occur. If the tension near the peel point is adjusted solely by the far-end take-up shaft, the control action must travel through a long roll path and multiple guide rollers before reaching the peel point, which can easily lead to response lag.

[0007] In actual production, batch-to-batch material variations also exist. The surface roughness of the paper substrate, the curing degree of the composite adhesive layer, ambient temperature and humidity, and the surface treatment state of the release film can all alter the peel force per unit width, causing the actual peel point to slowly shift along the circumference of the release roller. Simply operating according to the preset peel angle cannot continuously adapt to these changes, while frequent direct adjustments to the guide roller position introduce new path length disturbances. Therefore, it is necessary to handle instantaneous tension disturbances and continuous peel point offsets with different actuators.

[0008] The aforementioned problems indicate that the stability of a peeling and rewinding device depends not only on the accuracy of a single tension controller, but also on the position of the traction boundary, the geometry of the peeling angle adjustment mechanism, and the response sequence of each control loop. This invention employs a coordinated design in both the mechanical path and control hierarchy to form a complete technical closed loop from unwinding and peeling to rewinding the two branches. Summary of the Invention

[0009] The purpose of this invention is to provide a peeling and rewinding machine and a peeling method. The machine isolates tension disturbances on the unwinding side through a main traction assembly for the composite roll material. It establishes paper-side and film-side traction boundaries near the nominal peeling point through a paper substrate branch traction assembly and a peeling film branch traction assembly, respectively. A peeling angle adjustment structure, which moves the center of the peeling film guide roller along an arc trajectory centered on the nominal peeling point in the side view projection of the equipment, reduces the change in film-side path length when adjusting the peeling angle. Different execution cycles of local tension adjustment, peeling point position correction, and remote winding coordination control improve the stability of continuous peeling and separate rewinding.

[0010] To achieve the above objectives, the present invention provides a peeling and rewinding machine, comprising a frame, an unwinding unit, a pre-peeling material storage and tension adjustment unit, a composite roll main traction assembly, a peeling assembly, a paper substrate branch traction assembly, a peeling film branch traction assembly, a peeling point detection assembly, a control unit, a paper-side buffer rewinding unit, and a film-side buffer recovery unit.

[0011] The first tension detection element is located between the unwinding unit and the main traction assembly of the composite roll material to detect the unwinding side feeding tension. The control unit adjusts the unwinding torque or braking force based on the detection result. The second and third tension detection elements are respectively located between the nominal peel point and the two branch traction assemblies. The control unit adjusts the branch traction speed or torque on the paper side and film side, respectively. Thus, the main traction assembly of the composite roll material isolates the unwinding side tension disturbance from the nominal peel point, and the two branch traction assemblies isolate the far-end winding disturbance from the local tension areas on the paper side and film side.

[0012] The peeling assembly includes a peeling roller, a paper substrate guide roller, a peeling film guide roller, an arc-shaped guide rail, a moving seat, an angle adjustment actuator, and a position detection device. The arc-shaped guide rail is configured to move the center of the peeling film guide roller along an arc trajectory centered on the nominal peeling point in the side view projection of the equipment, so that when the output direction of the peeling film guide roller changes, the geometric distance from its center to the nominal peeling point remains unchanged; the remaining path variation caused by actual peeling point offset, manufacturing and assembly errors is absorbed by the film-side floating compensation roller.

[0013] The peel point detection component detects the boundary position between the paper substrate and the release film. The control unit does not adjust the moving seat when the position deviation is within the allowable range. When the position deviation exceeds the allowable range for a short period, it prioritizes suppressing disturbances through paper-side and film-side tension adjustment. The moving seat is only driven to move along the arc-shaped guide rail when the position deviation continuously exceeds the allowable range for a preset duration or when the position deviation exceeds a second threshold. The peel point position correction execution cycle is longer than the local tension adjustment execution cycle to reduce mutual following between different actuators.

[0014] The present invention also provides an independent stripping method, including complete material feeding and parameter setting, pretension establishment and basic linear speed start, local tension adjustment on the unwinding side and the two branches, stripping point position correction based on duration and a second threshold, far-end winding coordination based on floating compensation roller position and roll diameter, separate rewinding and deceleration stop.

[0015] Preferably, the main traction assembly of the composite roll material operates at a set base linear speed, and the unwinding unit changes the unwinding torque or braking force based on the detection result of the first tension detection element; the paper substrate branch traction assembly and the release film branch traction assembly use the base linear speed as feedforward, and respectively superimpose the restricted speed correction amount generated by the corresponding tension deviation. This control method ensures that the base linear speed, unwinding tension, and local tension of the two branches each have clearly defined control targets.

[0016] Preferably, the position result output by the peel point detection component is first subjected to validity judgment and filtering. When the detection result is within the allowable peel point range, the moving seat remains stationary; when the position deviation is short and exceeds the allowable range, only the two branch traction components handle any potential tension disturbances; only when the position deviation persists or exceeds the second threshold is the moving seat driven to move along the arc-shaped guide rail. This avoids the peel angle adjustment mechanism from frequently operating due to roll material vibration, joint passage, or detection noise.

[0017] Preferably, the paper-side floating compensation roller and the film-side floating compensation roller are each set with a preset intermediate position. The remote winding drive generates a feedforward torque based on the current roll diameter and target tension, and generates a feedback correction amount based on the degree to which the floating compensation roller deviates from the intermediate position, so that the floating compensation roller retains a bidirectional buffer stroke.

[0018] The control loops in the above structure are not simply parallel and independent of each other: the main traction assembly of the composite roll first spatially isolates unwinding disturbances, while the paper-side and film-side branch traction assemblies then spatially isolate far-end rewinding disturbances; local tension adjustment prioritizes rapid disturbances in time, arc-shaped peel angle adjustment handles continuous offsets, and floating compensation rollers and far-end rewind control absorb remaining path and roll diameter variations. All these technical features work together to stabilize the nominal peel point.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. The first tension detection element and the unwinding unit form a tension closed loop on the unwinding side, and the main traction assembly of the composite roll material forms an isolation boundary on the feeding side, which can reduce the impact of changes in unwinding diameter and braking torque on the nominal peel point;

[0021] 2. Branch traction boundaries and tension detection elements are set on the paper side and film side near the nominal peeling point, which can reduce the impact of the far-end winding disturbance of one branch on the peeling state of the other branch;

[0022] 3. The center of the peeling film guide roller moves along an arc trajectory centered on the nominal peeling point, which can reduce the change in the effective path length of the film side and tension impact when adjusting the peeling angle;

[0023] 4. Local tension adjustment prioritizes handling instantaneous disturbances, peel point position correction only handles continuous deviations, and far-end winding control handles changes in roll diameter and buffer position, which can reduce control oscillations caused by the simultaneous high-frequency operation of multiple actuators.

[0024] 5. The film-side floating compensation roller can absorb the actual peeling point offset and the remaining path change caused by manufacturing and assembly errors. The paper-side and film-side winding drives perform roll diameter feedforward and position feedback respectively, which helps to reduce the tension peak during the start-up, acceleration, deceleration and shutdown stages.

[0025] 6. The peel point detection component can provide feedback on the actual peeling status, which helps to reduce paper wrinkles or fuzzing, film layer breakage, local unpeeled areas, and uneven rewinding tension. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the peeling and rewinding machine of the present invention;

[0027] Figure 2 This is a schematic diagram of the conveying path of the composite roll, paper substrate and release film of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the three-branch traction assembly near the nominal stripping point of the present invention;

[0029] Figure 4 This is a schematic diagram showing the division of the unwinding side tension control area, the local tension areas on the paper side and the film side, and the far-end buffer zone in this invention.

[0030] Figure 5 This is a schematic diagram of the overall structure of the peeling component of the present invention;

[0031] Figure 6 This is a schematic diagram of the arc-shaped motion trajectory of the peeling film guide roller of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the peeling point detection component of the present invention;

[0033] Figure 8 This is a schematic diagram of the paper-side buffer rewinding unit of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the membrane-side buffer recovery unit of the present invention;

[0035] Figure 10 This is a flowchart of the peeling method of the present invention.

[0036] The components are as follows: 1-Frame; 2-Unwinding unit; 21-Unwinding shaft; 3-Pre-peeling material storage and tension adjustment unit; 31-First guide roller; 32-Second guide roller; 33-First tension detection element; 4-Composite roll main traction assembly; 41-Main traction roller; 42-Main pressure roller; 5-Peeling assembly; 51-Peeling roller; 52-Paper substrate guide roller; 53-Peeling film guide roller; 54-Arc-shaped guide rail; 55-Moving seat; 56-Angle adjustment actuator; 57-Position detection element; 6-Paper substrate branch traction assembly; 61-Paper side traction roller; 62-Paper side pressure roller; 63-Second tension detection element; 7-Peeling film branch traction assembly; 71-Film side traction roller; 72-Film side pressure roller; 73-Third tension detection element. 8-Test piece; 8-Peel point detection assembly; 81-Mounting bracket; 82-Camera or photodetector; 83-Illumination assembly; 9-Control unit; 10-Composite roll; 101-Paper substrate; 102-Release film; 103-Nominal peel point; 11-Paper-side buffer rewinding unit; 111-Paper-side floating compensation roller; 112-Paper substrate winding shaft; 113-Paper substrate roll; 114-Paper-side winding drive; 12-Film-side buffer recovery unit; 121-Film-side floating compensation roller; 122-Release film winding shaft; 123-Release film roll; 124-Film-side winding drive; 201-Unwinding side tension control area; 202-Paper-side local tension area; 203-Film-side local tension area; 204-Far-end buffer zone. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and technical features described in this application can be combined with each other. The invention will be further described below with reference to the accompanying drawings. The embodiments described are for explaining the invention and are not intended to limit the scope of protection of the invention. The upstream and downstream terms used herein refer to the direction of roll material movement; the paper side and film side are only used to distinguish the two material branches after peeling, and do not limit their absolute vertical positions in the equipment; preset parameters can be stored in the control unit 9 based on the roll material, width, equipment speed, and trial results.

[0038] Reference Figure 1 and Figure 2The frame 1 adopts a rigid frame structure, providing a unified installation benchmark for all roller systems, traction components, detection components, and unwinding / rewinding units. The unwinding unit 2 is located upstream of the frame 1, and the unwinding shaft 21 is used to install and release the composite roll 10. The unwinding unit 2 can employ a servo unwinding motor, a variable frequency motor, and a brake or magnetic powder brake to adjust the feed tension by changing the unwinding torque or braking force. The composite roll 10 consists of stacked paper substrates 101 and a release film 102. After being drawn from the unwinding shaft 21, it sequentially passes through the first guide roller 31, the second guide roller 32, the first tension detection element 33, and the main traction component 4 of the composite roll. In the illustrated embodiment, the paper substrate 101 is conveyed along the upper branch, and the release film 102 is conveyed along the lower branch. These upper and lower positions are only for illustrative purposes and do not constitute a limitation on the actual installation direction.

[0039] The frame 1 can be constructed from profiles, welded frames, or plate frames. The axes of the unwinding shaft 21, each traction roller, and the take-up shaft are preferably parallel to each other to reduce lateral deviation of the roll material. Each roller is mounted to the frame 1 via bearing seats, with a unified installation reference set at both ends of the bearing seats. For roll materials with a large width, adjustable bearing seats or roller deflection compensation structures can be used to maintain the parallelism of the roller surfaces. The roller surface can be made of hard metal or an elastic coating layer, depending on the surface characteristics of the roll material. The clamping force between the traction roller and the pressure roller should be such that relative slippage does not occur and the material is not damaged.

[0040] The paper substrate 101 of the composite roll 10 can be paper, coated paper, transfer paper, or other substrates with a continuous strip shape, and the release film 102 can be a polyester film, polyethylene film, protective film, carrier film, or other film layers that can be continuously peeled off from the paper substrate 101. This invention does not limit the specific adhesive layer system of the composite material, as long as the two layers can be continuously separated along different paths near the release roller 51.

[0041] During threading, fixed guide rollers are used to establish a stable wrap angle and limit the roll height, while floating rollers provide path allowance. The wrap angle of the roll on each roller should not be too small to avoid slippage, nor too large to cause unnecessary bending resistance. The paper-side and film-side paths should not intersect, and the two branches should have independent guiding, traction, cushioning, and winding paths starting from the nominal peel point 103.

[0042] Example 2: Unwinding Side Tension Control and Base Speed ​​Establishment

[0043] The pre-peeling material storage and tension adjustment unit 3 can adopt a combination structure of fixed guide rollers and floating guide rollers. The first tension detection element 33 is set in the force measuring roller bearing seat, swing arm or guide roller support between the unwinding unit 2 and the composite roll main traction assembly 4, and is used to detect the feeding tension on the unwinding side. The control unit 9 compares the first tension detection value with the target tension on the unwinding side, and adjusts the unwinding torque or braking force of the unwinding unit 2 according to the comparison result; the floating structure is used to absorb short-term speed changes at the unwinding end.

[0044] The composite roll main traction assembly 4 includes a main traction roller 41 and a main pressure roller 42. The main traction roller 41 is connected to the main traction drive and is used to establish the basic linear speed of the entire machine. The main pressure roller 42 can press or release relative to the main traction roller 41. The main traction roller 41 and the main pressure roller 42 clamp the composite roll 10, forming an isolation boundary for the transmission of tension disturbances on the unwinding side to the nominal peeling point 103. Figure 4 The roll path between the unwinding unit 2 and the composite roll main traction assembly 4 forms the unwinding side tension control zone 201.

[0045] The detected value output by the first tension detection element 33 is recorded as the actual tension on the unwinding side, and the control unit 9 compares it with the target tension on the unwinding side. When the actual tension is higher than the target tension, the control unit 9 reduces the unwinding braking force, increases the active unwinding torque, or appropriately increases the unwinding speed; when the actual tension is lower than the target tension, the opposite adjustment is performed. To avoid changes in control gain caused by changes in the unwinding diameter, the unwinding diameter can be estimated based on the unwinding shaft angular velocity and the base linear velocity, and the product of the target tension and the unwinding diameter is used as the unwinding torque feedforward.

[0046] The main traction roller 41 operates primarily in speed mode, while the main pressure roller 42 can be clamped by a cylinder, electric push rod, or spring loading mechanism. The main traction assembly 4 and the unwinding tension circuit employ different control objects: the former establishes the baseline linear velocity of the roll material entering the stripping zone, while the latter maintains a stable feed tension upstream of the main traction assembly 4. This avoids the ambiguity of the control object caused by the first tension detection element 33 simultaneously driving both the main traction and unwinding actuators.

[0047] During the start-up phase, the main pressure roller 42 first presses and confirms the clamping state. After the unwinding unit 2 establishes a low pretension, the main traction roller 41 starts at a ramp speed. During the shutdown phase, the main traction roller 41 descends at a set deceleration, and the unwinding unit 2 increases the braking force or decreases the active unwinding torque accordingly to avoid loosening of the roll material.

[0048] Reference Figure 3 and Figure 4 The composite roll 10 separates into a paper substrate 101 and a release film 102 at the nominal peel point 103. The paper substrate 101 enters the paper substrate branch traction assembly 6 via the paper substrate guide roller 52, and the release film 102 enters the release film branch traction assembly 7 via the release film guide roller 53. The paper-side traction roller 61 and the paper-side pressure roller 62 hold the paper substrate 101, and the film-side traction roller 71 and the film-side pressure roller 72 hold the release film 102.

[0049] The second tension detection element 63 is disposed between the nominal peel point 103 and the paper-side traction roller 61, and the third tension detection element 73 is disposed between the nominal peel point 103 and the film-side traction roller 71. A local tension zone 202 on the paper side is formed between the nominal peel point 103 and the paper substrate branch traction assembly 6, and a local tension zone 203 on the film side is formed between the nominal peel point 103 and the peel film branch traction assembly 7. The paper-side buffer rewinding unit 11 and the film-side buffer recovery unit 12 form a remote buffer zone 204. The paper-side traction roller 61 and the film-side traction roller 71 respectively constitute the downstream traction boundaries of the two local tension zones, so that the diameter changes of the paper substrate winding shaft 112 and the peel film winding shaft 122 are first absorbed by the corresponding floating compensation roller and the remote winding control.

[0050] The second tension detection element 63 and the third tension detection element 73 can be force measuring rollers, cantilever tension sensors, or force sensors mounted on the guide roller bearing housing. To improve detection stability, the wrap angle of the roll material on the tension detection roller should remain basically constant. The control unit 9 calculates the actual tension of the corresponding branch based on the sensor output and the wrap angle relationship. The second tension detection element 63 and the third tension detection element 73 are preferably arranged close to the nominal peeling point 103, while not interfering with the movement of the peeling film guide roller 53.

[0051] The local tension on the paper side and the local tension on the film side can be set separately according to the material's load-bearing capacity and the peeling process; they do not need to be equal. When the paper substrate 101 has high stiffness, the paper surface can be kept flat by using the target tension on the paper side; when the peeling film 102 is thin or has a low elongation at break, a lower target tension on the film side can be set. The two branch traction components are adjusted in a closed loop, which can reduce the cross-influence caused by different material properties.

[0052] When there is a sudden change in local thickness or an instantaneous increase in peel force at a roll joint, the second tension detector 63 or the third tension detector 73 will detect the corresponding local tension change first, and the control unit 9 will prioritize correcting the corresponding branch traction speed. Since the paper-side traction roller 61 and the film-side traction roller 71 are located close to the nominal peel point 103, the correction effect can reach the peeling area without passing through the far-end winding roll and a long free path.

[0053] Reference Figure 5 and Figure 6 The peeling roller 51 is used to support the bending and separation of the composite roll 10 near the nominal peeling point 103. The paper substrate 101 changes its output direction via the paper substrate guide roller 52, and the peeling film 102 changes its output direction via the peeling film guide roller 53, thereby forming a set peeling angle at the nominal peeling point 103.

[0054] In one specific embodiment, the arc-shaped guide rail 54 adopts an arc-shaped guide groove fixed to the side plate of the frame 1. The movable seat 55 is provided with a roller assembly that cooperates with the arc-shaped guide groove. The roller assembly limits the movable seat 55 from both sides of the arc-shaped guide groove, so that the axis of the peeling film guide roller 53 remains parallel to the axis of the peeling roller 51 during movement. The angle adjustment actuator 56 adopts a servo electric cylinder, the fixed end of which is hinged to the frame 1, and the output end is hinged to the movable seat 55 through a connecting rod. The position detection device 57 adopts a magnetic scale set along the arc-shaped guide rail 54 and a reading head installed on the movable seat 55. The above structure can also be replaced by an arc-shaped linear guide rail, an arc-shaped rack and pinion guide rail, or a screw and connecting rod drive structure.

[0055] The arc-shaped guide rail 54 is configured to allow the center of the peeling film guide roller 53 to move along an arc trajectory centered on the nominal peeling point 103 in the side view projection of the equipment. As the moving seat 55 moves along the arc-shaped guide rail 54, the azimuth angle of the peeling film guide roller 53 relative to the nominal peeling point 103 changes, while the geometric distance from the nominal peeling point 103 to the center of the peeling film guide roller 53 remains constant. In actual equipment, variations in the residual path caused by the roll thickness, the actual movement of the peeling point along the surface of the peeling roller 51, and manufacturing and assembly errors are absorbed by the displacement of the film-side floating compensation roller 121.

[0056] The radius of the arc of the arc-shaped guide rail 54 is determined based on the diameter of the peeling roller 51, the diameter of the peeling film guide roller 53, the target peeling angle range, and the equipment installation space. During the design process, the reference position of the nominal peeling point 103 on the circumference of the peeling roller 51 is first determined, and then the arc-shaped guide rail 54 is arranged with this position as the center, so that the center of the peeling film guide roller 53 moves along the same arc within the allowable adjustment range. Mechanical limits or stroke detection can be set at both ends of the arc-shaped guide rail 54 to prevent the moving seat 55 from exceeding the effective movement range.

[0057] The angle adjustment actuator 56 and the movable seat 55 are preferably connected by a hinge that allows for small-angle oscillation, so that the linear extension and retraction of the actuator can be converted into the arc motion of the movable seat 55 without lateral jamming. The movable seat 55 may be provided with pairs of rollers or pre-tensioned sliders on both sides of the guide rail to limit radial clearance and axial oscillation. The zero point of the position detection element 57 can correspond to a preset target peel angle, and the angle setting is achieved by storing a calibration table between the movable seat position and the peel angle.

[0058] Figure 6 The movement state of the peeling film guide roller 53 is represented by two positions. When the movable seat 55 moves from the first position to the second position, the orientation of the peeling film 102 after leaving the nominal peeling point 103 changes, while the geometric distance from the nominal peeling point 103 to the center of the peeling film guide roller 53 remains unchanged. Compared with the linear movement of the guide roller along the horizontal or vertical direction, this geometric relationship can reduce the amount of path abrupt changes that need to be compensated by the tension circuit during the angle adjustment process.

[0059] When the actual peeling point deviates from the nominal peeling point 103, a positional difference will occur between the center of the arc trajectory and the actual peeling point. This invention does not require this difference to be zero, but rather limits the deviation range through the peeling point detection component 8 and absorbs any remaining path changes that occur during the arc-shaped movement through the film-side floating compensation roller 121. Therefore, the arc-shaped guide rail 54 and the film-side floating compensation roller 121 form a mutually cooperating two-stage path compensation.

[0060] Reference Figure 7 The peel point detection assembly 8 includes a mounting bracket 81, a camera or photodetector 82, and an illumination assembly 83. The mounting bracket 81 has vertical, horizontal, and angle adjustment structures to ensure that the detection area covers the predetermined peel area on the peeling roller 51. The illumination assembly 83 may employ a strip-shaped oblique light source or a ring light source to enhance the brightness or reflection difference at the boundary between the paper substrate 101 and the peel film 102.

[0061] When using a camera for detection, the control unit 9 first acquires the pixel coordinates corresponding to the nominal peel point 103 in a stopped calibration state, and establishes a mapping relationship between the pixel coordinates and the circumferential position of the peeling roller 51 through two or more known locations. During operation, the image brightness is normalized within a preset region of interest, and the grayscale gradient is calculated along the roll material conveying direction or the circumferential direction of the peeling roller. The location of the continuous gradient peak is determined as the boundary position between the paper substrate 101 and the peeling film 102. When using a photodetector, the boundary position is determined based on the transition position of the reflection intensity between the paper substrate 101 and the peeling film 102. The control unit 9 performs median filtering or low-pass filtering on the continuously detected position results to reduce instantaneous errors caused by roll material vibration, local reflection, and texture.

[0062] In the implementation using linear local calibration, let the detected actual peeling boundary pixel coordinates be... The pixel coordinates corresponding to the nominal stripping point 103 are The actual circumferential displacement coefficient corresponding to a unit pixel is The actual peeling point deviates from the nominal peeling point 103. It can be represented as:

[0063]

[0064] in, The sign indicates the direction of the actual peeling point's offset relative to the nominal peeling point 103. This can be achieved by moving a calibration component at a known distance, a known circumferential mark, or changing the known position of the moving base 55. For cases with significant field-of-view distortion, piecewise linear mapping or calibration curves can be used instead of a single scaling factor.

[0065] To suppress detection noise, moving median filtering, moving average filtering, or first-order low-pass filtering can be used to address positional deviations. When using first-order low-pass filtering, the current filtering result is obtained by weighting the current detection value and the filtering value from the previous cycle, with the weighting coefficients selected based on the material vibration frequency and the required response speed. Filtering is only used to eliminate short-cycle noise and should not completely attenuate continuous peel point offsets.

[0066] The control unit 9 can also determine the validity of the detection. When the image contrast is lower than the threshold, the number of boundary gradient peaks is abnormal, the detection position jump exceeds the physical allowable speed, or the camera communication is interrupted, the detection result of that cycle is marked as invalid, and the angle adjustment actuator 56 is not driven according to the result; when the number of consecutive invalid results reaches a preset number, the base linear speed is reduced or a detection abnormality prompt is issued.

[0067] When the filtered position deviation is At that time, the control unit 9 can determine the target displacement correction amount of the moving seat 55 along the arc-shaped guide rail 54 according to the following formula:

[0068] ;

[0069] in, K is the displacement correction amount of the movable seat 55 along the arc-shaped guide rail 54. x To obtain the position correction coefficient through trial calibration, the control unit 9 counts the detection cycles that continuously exceed the allowable range of the peeling point, and performs position correction of the moving seat 55 only when the count reaches the number of cycles corresponding to the preset duration, or when the position deviation exceeds the second threshold.

[0070] Reference Figure 8 After being output from the paper substrate branch traction assembly 6, the paper substrate 101 passes over the paper-side floating compensation roller 111 and is wound up by the paper substrate take-up shaft 112 to form a paper substrate roll 113. The paper-side floating compensation roller 111 can be mounted on a linear guide slide or a swing arm and a preset tension force is applied by a counterweight, cylinder, or spring. The paper-side take-up drive 114 adjusts the output torque according to the current roll diameter of the paper substrate roll 113 and the position of the paper-side floating compensation roller 111.

[0071] Reference Figure 9 After being output from the peel film branch traction assembly 7, the release film 102 passes around the film-side floating compensation roller 121 and is wound up by the peel film take-up shaft 122 to form a peel film roll 123. The film-side take-up drive 124 adjusts the output torque according to the current roll diameter of the peel film roll 123 and the position of the film-side floating compensation roller 121. The paper-side and film-side remote take-up controls are independent of each other to compensate for changes in material thickness, roll diameter, and inertia, respectively.

[0072] Control unit 9 executes three response levels. The first level is a local tension adjustment level: Control unit 9 adjusts the unwinding torque or braking force of unwinding unit 2 according to the output of the first tension detector 33, and the main traction roller 41 runs at a set base linear speed; Control unit 9 corrects the linear speeds of paper-side traction roller 61 and film-side traction roller 71 respectively according to the outputs of the second tension detector 63 and the third tension detector 73. The base linear speed is... Paper-side traction line speed and membrane-side traction linear velocity They can be represented as:

[0073]

[0074]

[0075] in, and The speed is determined separately based on the paper-side tension deviation and the film-side tension deviation through proportional-integral adjustment, and is limited to their respective preset speed correction ranges. Within a local tension adjustment execution cycle, the base linear velocity remains constant to avoid the main traction and the two branch tractions simultaneously following the same instantaneous disturbance.

[0076] Let the paper-side tension deviation be the difference between the target paper-side tension and the value detected by the second tension detector 63, and the film-side tension deviation be the difference between the target film-side tension and the value detected by the third tension detector 73. The control unit 9 can calculate the two speed corrections using proportional-integral regulation, and limit the corrections and their rates of change using a limiting function. The corresponding discrete control relationship can be expressed as:

[0077] ;

[0078] ;

[0079] Among them, subscript Indicates the current sampling period. For tension adjustment sampling period, , , , These are the adjustment parameters corresponding to the paper side and the film side, respectively. This indicates that the speed correction amount is limited to a preset range. The above parameters can be adjusted by low-speed testing, step disturbance testing, or gradually increasing the linear speed.

[0080] The two branch tension loops are preferably configured with independent parameters. When the paper-side or film-side tension deviation is within a small dead zone, the current speed correction can be maintained or the speed can be slowly reduced to zero to avoid frequent forward and reverse adjustments of the actuator near the detection noise. When the detected tension approaches the material's safe upper limit, speed correction should be limited and the base linear speed reduced, rather than continuing to increase the traction differential.

[0081] The second layer is the peeling point position correction layer. Control unit 9 maintains the position of the moving seat 55 when the position deviation is within the allowable range; if the position deviation briefly exceeds the allowable range, the first layer first eliminates tension disturbances; only when the position deviation continuously exceeds the allowable range for a preset duration or the position deviation exceeds the second threshold is the angle adjustment actuator 56 driven to move the moving seat 55 along the arc-shaped guide rail 54. The peeling point position correction execution cycle is longer than the local tension adjustment execution cycle.

[0082] The third layer is the remote winding coordination layer. Control unit 9 performs low-frequency torque correction based on the roll diameter, winding shaft angular velocity, and floating compensation roller position of the paper-side buffer rewinding unit 11 and the film-side buffer recovery unit 12. The update cycle of the remote winding coordination control is longer than the execution cycle of the local tension adjustment. For any winding shaft... When its angular velocity is higher than the preset angular velocity threshold, the current winding radius... According to the roll material linear speed With the angular velocity of the winding shaft Sure:

[0083] ;

[0084] When the angular velocity of the winding shaft is not higher than the preset angular velocity threshold, to avoid amplifying measurement errors in the speed ratio calculation at low speeds, the control unit 9 calculates the current winding radius based on the core radius, cumulative roll length, and roll thickness. Ignoring interlayer gaps, the low-speed roll diameter estimation relationship can be expressed as:

[0085] ;

[0086] Where R0ᵢ is the corresponding core radius, hᵢ is the corresponding roll thickness, and Lᵢ is the cumulative roll length starting from the current core. In actual use, a roll compaction coefficient can be set to correct interlayer gaps and material compression; when the angular velocity of the winding shaft crosses a preset angular velocity threshold, hysteresis judgment, weighted transition, or low-pass filtering can be used to smoothly switch between the speed ratio calculation result and the cumulative length calculation result, avoiding abrupt changes in the roll diameter estimation value.

[0087] ;

[0088] in, To achieve the target winding tension, The equivalent moment of inertia of the winding shaft and the current roll of material. This is the angular acceleration of the winding spool. This is the feedback correction amount based on tension deviation or the position of the floating compensation roller. The product of the target tension and the current winding radius is used for tension feedforward, the inertia term is used for acceleration / deceleration compensation, and the feedback correction amount is used to return the floating compensation roller to the preset intermediate range.

[0089] Let the current position of the corresponding floating compensation roller be... The default middle position is Feedback correction amount The feedback correction amount can be determined based on the position deviation and the moving speed of the floating compensation roller, so as to simultaneously correct long-term positional offsets and suppress rapid oscillations. In one implementation, the feedback correction amount can be expressed as:

[0090] ;

[0091] in, For location feedback coefficient, This is the speed damping coefficient. The above parameters are set on the paper side and the film side respectively, so that the paper side floating compensation roller 111 and the film side floating compensation roller 121 are kept near the middle of their respective strokes during normal operation.

[0092] The control bandwidth of the remote take-up coordination layer is lower than that of the local tension adjustment layer, allowing the take-up shaft to primarily compensate for slow changes in roll diameter and the average positional deviation of the floating compensation rollers, rather than directly following high-frequency tension fluctuations near the nominal peel point. Through this bandwidth allocation, the branch traction assembly is responsible for maintaining local tension, while the take-up drive is responsible for maintaining buffer capacity.

[0093] Reference Figure 10 The stripping method of this embodiment includes the following steps:

[0094] S1. Perform fabric insertion and initial settings. The composite roll 10 is installed on the unwinding shaft 21, and the composite roll 10 passes sequentially through the first guide roller 31, the second guide roller 32, the first tension detection element 33, the clamping area between the main traction roller 41 and the main pressure roller 42, and is led to the peeling roller 51. The paper substrate 101 and the peeling film 102 are separated in advance at the nominal peeling point 103. The paper substrate 101 passes sequentially through the paper substrate guide roller 52, the second tension detection element 63, the clamping area between the paper-side traction roller 61 and the paper-side pressure roller 62, and the paper-side floating compensation roller 111 before being connected to the paper substrate winding shaft 112. The peeling film 102 passes sequentially through the peeling film guide roller 53, the third tension detection element 73, the clamping area between the film-side traction roller 71 and the film-side pressure roller 72, and the film-side floating compensation roller 121 before being connected to the peeling film winding shaft 122. The basic linear speed, unwinding side target tension, paper-side target tension, film-side target tension, target peeling angle, peeling point allowable range, second threshold, and preset duration are set.

[0095] S2. Start and establish tension. First, run the film-side winding drive 124 at low speed to establish film-side pretension, then run the paper-side winding drive 114 at low speed to establish paper-side pretension, and then the unwinding unit 2 establishes unwinding-side pretension; the main traction roller 41 increases the base linear speed according to the set acceleration, the paper-side traction roller 61 and the film-side traction roller 71 follow the base linear speed, and the paper-side floating compensation roller 111 and the film-side floating compensation roller 121 are located in the preset middle range of their respective strokes.

[0096] S3. Acquire detection signals. In real time, acquire signals from the first tension detection element 33, the second tension detection element 63, the third tension detection element 73, the peel point detection component 8, the paper-side floating compensation roller 111, and the film-side floating compensation roller 121 to obtain the unwinding side tension, paper-side tension, film-side tension, actual peel point position, and the positions of the two floating compensation rollers.

[0097] S4. Perform local tension adjustment. Adjust the unwinding torque or braking force according to the output of the first tension detection element 33, and superimpose the paper-side and film-side speed corrections according to the outputs of the second tension detection element 63 and the third tension detection element 73 respectively, so as to keep the three tension zones stable.

[0098] S5. Perform peeling point position correction. When the actual peeling point is within the allowable range, maintain the position of the moving seat 55; when the position deviation is short and exceeds the allowable range, execute step S4 first; when the position deviation continuously exceeds the allowable range for a duration that reaches a preset duration or the position deviation exceeds the second threshold, drive the moving seat 55 to move along the arc-shaped guide rail 54 to correct the position of the peeling film guide roller 53.

[0099] S6. Perform remote winding coordination. Based on the positions of the paper-side floating compensation roller 111 and the film-side floating compensation roller 121, the corresponding roll diameter, and the angular velocity of the winding shaft, adjust the output torque of the paper-side winding drive 114 and the film-side winding drive 124 to keep the two floating compensation rollers near the preset intermediate range.

[0100] S7. Cyclic Operation and Shutdown. Execute steps S3-S6 cyclically. Paper substrate 101 is wound by paper substrate take-up shaft 112 to form paper substrate roll 113, and release film 102 is wound by release film take-up shaft 122 to form release film roll 123. When the processing of this roll is completed, the machine stops in the following sequence: main traction deceleration, branch tension maintenance, far-end winding inertia compensation, and gradual tension release.

[0101] In one exemplary embodiment, the sampling period for local tension detection and adjustment can be set to 5-20 ms, the judgment and execution period for peel point position correction can be set to 100-500 ms, and the update period for remote roll diameter and floating compensation roller position control can be set to 50-200 ms; the correction amount for paper-side and film-side traction speeds can be limited to ±0.5%-±2% of the base linear speed. These parameters are used to illustrate the time-scale relationship between different response levels, and the specific values ​​are determined through trial runs based on the roll width, material stiffness, peel strength, and maximum equipment speed.

[0102] When using a certain specification of composite roll material 10 for the first time, the trial run can be performed in the following order: low-speed feeding, tension zero-point calibration, roll diameter parameter input, peel point optical calibration, target tension trial setting, and gradual speed increase. Tension zero-point calibration is performed under no-load or known load conditions on the roll material to eliminate bias caused by pre-tensioning of the tension detection element and temperature drift. The roll diameter parameters include at least the unwinding core radius, paper-side core radius, film-side core radius, and corresponding material thickness.

[0103] During the optical calibration of the peeling point, the moving base 55 is positioned at the reference position, and the actual peeling point under stable peeling conditions is set as the nominal peeling point 103. The camera pixel coordinates or photodetector switching position are recorded. Subsequently, the moving base 55 is moved along the arc-shaped guide rail 54 by one or more known displacements to establish the relationship between the position deviation and the moving base correction amount. If the reflective characteristics of different materials vary greatly, the illumination brightness, exposure time, threshold, and filtering parameters can be saved separately.

[0104] The establishment of target tension should consider both the material's tensile tolerance and peel stability. Initially, the target tension on both the paper and film sides can be gradually increased at a low linear speed, observing the peel point location, paper surface smoothness, and film condition. The initial target value should be determined without causing paper fuzzing, permanent elongation, or film breakage. Subsequently, the base linear speed should be gradually increased, and the control parameters adjusted. The above calibration results can be formulated according to material type and used during roll changes or type changes.

[0105] The zero position and stroke endpoint of the arc-shaped guide rail 54 are calibrated by the position detection element 57. The control unit 9 stores the reference position, the allowable adjustment range, and the deceleration interval before the mechanical limit. When the moving seat 55 approaches the stroke endpoint, the position correction speed is reduced. When the endpoint is reached, the drive stops and further movement in the same direction is prohibited.

[0106] When the first tension detection value exceeds the upper limit, the control unit 9 prioritizes increasing the unwinding speed or decreasing the braking force, and reduces the base linear speed if necessary; when the second or third tension detection value exceeds the upper limit, the speed correction amount of the corresponding branch traction component is limited; when the paper-side floating compensation roller 111 or the film-side floating compensation roller 121 approaches the travel limit, the corresponding winding drive is adjusted first; when the actual peeling point exceeds the allowable range and the moving seat 55 reaches the travel limit, the base linear speed is reduced and an abnormality warning is issued; when the paper-side or film-side tension drops rapidly to the tape breakage threshold, each traction component and winding shaft stops synchronously according to the preset deceleration.

[0107] Control unit 9 is prohibited from entering continuous peeling mode if any pressure roller has not reached the pressing position, the take-up shaft has not completed clamping, the roll path protection door is not closed, or the drive is not in an operational state. In the event of an emergency stop, each drive can stop in a controlled rapid deceleration manner, while maintaining necessary unwinding braking force and take-up holding torque to avoid large-scale unwinding due to inertia; tension at each point is gradually released after the equipment stops.

[0108] When the peel point detection component 8 continuously outputs invalid results, the control unit 9 stops automatic peel angle correction and maintains the current position of the moving seat 55. Local tension adjustment and remote winding control can continue to operate under reduced line speed. If the actual peel state cannot be confirmed by the operator, the machine is stopped. This degradation method can prevent the angle adjustment actuator 56 from malfunctioning due to detection failure.

[0109] When the paper-side floating compensation roller 111 or the film-side floating compensation roller 121 oscillates rapidly, the control unit 9 can reduce the feedback gain at the corresponding take-up position and check whether the bandwidth of the branch tension circuit and the take-up circuit overlaps. If the roll slips at the traction roller, the pressure of the pressure roller should be increased, the roller surface cleaned, or the acceleration reduced, rather than simply compensating by increasing the speed correction amount.

[0110] Without altering the overall concept of the invention, the vertical paths of the paper substrate 101 and the release film 102 in the accompanying drawings can be interchanged, the arc-shaped guide rail 54 can be positioned on the other side of the release roller 51, and the two buffer rewinding units can be arranged front-to-back or vertically depending on the factory space. As long as the main traction assembly 4 of the composite roll is located upstream of the nominal release point 103, the two branch traction assemblies are located on the two branch paths respectively, and the center of the release film guide roller 53 moves along an arc-shaped trajectory centered on the nominal release point 103, the same basic function can be achieved.

[0111] The arc-shaped guide rail 54 can be an arc-shaped guide groove and roller, an arc-shaped linear guide rail, an arc-shaped rack and gear, or a swing arm equivalent mechanism. When a swing arm is used, the swing arm pivot is set at the side view projection position of the nominal peeling point 103, and the peeling film guide roller 53 is installed at the free end of the swing arm, its center also moving along an arc centered on the nominal peeling point 103. The angle adjustment actuator 56 can be a servo electric cylinder, a lead screw motor, a rotary servo motor with a reduction mechanism, a hydraulic cylinder, or a pneumatic cylinder.

[0112] The peel point detection component 8 can employ an area array camera, a line array camera, a laser reflection sensor, a through-beam photodetector, or a multi-point photoelectric array. For materials where the paper substrate and the release film are similar in color but have different surface reflection characteristics, oblique illumination, polarized illumination, or light sources of different wavelengths can be used to enhance the boundary characteristics. For materials that are not suitable for optical detection, changes in displacement, pressure, or peel force can be used to indirectly determine the peel point trend, but the detection results are still used to trigger lower-frequency arc position correction.

[0113] The paper-side floating compensation roller 111 and the film-side floating compensation roller 121 can adopt a linear lifting type or a swing arm type structure, and their tension can be provided by a counterweight, spring, cylinder or controlled actuator. When using a controlled actuator, the preload of the buffer roller can be adjusted according to the material specifications without changing the branch traction boundary.

[0114] This invention is applicable to the peeling of paper from a carrier film, and can also be used for the separation and rewinding of two continuous strip materials with different mechanical properties. For multi-layer composite rolls, after the first layer is peeled off, the remaining composite layers can be introduced into another set of similar peeling components for subsequent separation.

[0115] During equipment operation, the unwinding unit 2 continuously feeds the composite roll material to the main traction assembly 4. The first tension detection element 33 and the unwinding torque or braking force adjustment maintain stable tension on the feeding side. The main traction roller 41 and the main pressure roller 42 clamp the composite roll material 10 and establish a basic linear velocity, blocking the direct transmission of changes in unwinding diameter and unwinding torque to the nominal peeling point 103 from the mechanical path. After the composite roll material 10 reaches the peeling roller 51, it is divided into paper substrate 101 and peeling film 102. The two branch traction assemblies respectively form downstream traction boundaries near the nominal peeling point 103, so that the changes in the roll diameter of the two far-end take-up shafts do not directly determine the local peeling tension.

[0116] When a branch experiences a momentary tension change, the corresponding tension detection element first detects the change, and the control unit 9 corrects the traction speed of the corresponding branch within a short period. At this time, the moving seat 55 remains stationary to avoid misinterpreting short-term tension fluctuations as requiring a change in the peel angle. If the material peel strength or process condition changes slowly, causing the actual peel point to continuously deviate from the nominal peel point 103, the peel point detection component 8 triggers the angle adjustment actuator 56 after filtering and duration judgment. The peel film guide roller 53 moves along the arc-shaped guide rail 54, changing the output direction of the peel film while keeping the geometric distance from the nominal peel point to the center of the peel film guide roller unchanged. The film-side floating compensation roller 121 absorbs residual path changes under actual conditions.

[0117] The paper-side and film-side remote winding drives feed forward the target tension based on the roll diameter and provide low-frequency feedback based on the position of the floating compensation rollers, keeping the two floating compensation rollers within a preset intermediate range. Thus, unwinding-side disturbances, localized rapid tension disturbances, continuous peel point offsets, and remote roll diameter variations are handled by the unwinding circuit, branch traction circuit, arc position correction circuit, and remote winding circuit, respectively. This combination of spatial isolation and temporal layering constitutes a complete control closed loop.

Claims

1. A peeling and rewinding machine, characterized in that, It includes a frame (1) and an unwinding unit (2), a pre-peeling storage and tension adjustment unit (3), a composite roll main traction assembly (4), a peeling assembly (5), a paper substrate branch traction assembly (6), a peeling film branch traction assembly (7), a peeling point detection assembly (8), a control unit (9), a paper side buffer rewinding unit (11), and a film side buffer recovery unit (12) mounted on the frame (1). The unwinding unit (2) is used to release the composite roll (10) formed by the lamination of paper substrate (101) and release film (102). The main traction assembly (4) of the composite roll is located upstream of the nominal peel point (103). The paper substrate branch traction assembly (6) and the release film branch traction assembly (7) are respectively located on the paper side conveying path and the film side conveying path downstream of the nominal peel point (103). The first tension detection element (33) is located between the unwinding unit (2) and the main traction assembly (4) of the composite roll. The second tension detection element (63) is located between the nominal peel point (103) and the paper substrate branch traction assembly (6). The third tension detection element (73) is located between the nominal peel point (103) and the release film branch traction assembly (7). The control unit (9) adjusts the unwinding unit (2), the paper substrate branch traction assembly (6) and the release film branch traction assembly (7) respectively according to the detection results of the three tension detection elements. The peeling assembly (5) includes a peeling roller (51), a paper substrate guide roller (52), a peeling film guide roller (53), an arc-shaped guide rail (54), a movable seat (55), and an angle adjustment actuator (56). The peeling film guide roller (53) is rotatably mounted on the movable seat (55), and the movable seat (55) is movablely engaged with the arc-shaped guide rail (54). The arc-shaped guide rail (54) is configured to allow the center of the peeling film guide roller (53) to move along an arc trajectory centered on the nominal peeling point (103) in the side view projection of the equipment. The detection component (8) is used to detect the actual peel point. The control unit (9) preferentially adjusts the local tension on the paper side and film side based on the detection results of the second tension detection component (63) and the third tension detection component (73). Only when the duration of the actual peel point continuously exceeding the allowable peel point range reaches a preset duration or the position deviation exceeds the second threshold, the control angle adjustment actuator (56) drives the moving seat (55) to move along the arc guide rail (54). The execution cycle of peel point position correction is greater than the execution cycle of local tension adjustment on the paper side and film side.

2. The peeling and rewinding machine according to claim 1, characterized in that, The composite roll main traction assembly (4) includes a main traction roller (41) and a main pressure roller (42) pressed together; the paper substrate branch traction assembly (6) includes a paper-side traction roller (61) and a paper-side pressure roller (62) pressed together; and the peeling film branch traction assembly (7) includes a film-side traction roller (71) and a film-side pressure roller (72) pressed together. The main traction roller (41) is driven by the main traction drive according to the basic linear speed, and the paper-side traction roller (61) and the film-side traction roller (71) are respectively connected to an independent drive.

3. The peeling and rewinding machine according to claim 1, characterized in that, The pre-peeling material storage and tension adjustment unit (3) includes a first guide roller (31), a second guide roller (32), and a floating structure for providing path margin. The first tension detection element (33) is set on the force measuring roller bearing seat, swing arm, or guide roller support. The composite roll material main traction assembly (4) is used to establish the basic linear speed. The control unit (9) adjusts the unwinding torque or braking force of the unwinding unit (2) according to the detection result of the first tension detection element (33).

4. The peeling and rewinding machine according to claim 1, characterized in that, It also includes a position detection component (57) for detecting the position of the movable seat (55), the peel point detection component (8) includes a mounting bracket (81), a camera or photodetector (82) and an illumination component (83); the control unit (9) performs validity judgment and filtering on the peel point detection results, and maintains the current position of the movable seat (55) when the detection result is invalid.

5. The peeling and rewinding machine according to claim 1, characterized in that, The paper-side buffer rewinding unit (11) includes a paper-side floating compensation roller (111), a paper substrate winding shaft (112), and a paper-side winding drive (114). The film-side buffer recovery unit (12) includes a film-side floating compensation roller (121), a peeling film winding shaft (122), and a film-side winding drive (124). The film-side floating compensation roller (121) is used to absorb the changes in the remaining path length caused by the actual peeling point offset, manufacturing and assembly errors, and the position correction of the moving seat (55). The control unit (9) adjusts the paper-side winding drive (114) and the film-side winding drive (124) according to the positions of the two floating compensation rollers and the corresponding winding diameter.

6. A peeling method, characterized in that, Includes the following steps: S1. Perform material threading and initial settings. Pass the composite roll (10) through the unwinding unit (2), the composite roll main traction assembly (4), and the peeling assembly (5) in sequence. Connect the peeled paper substrate (101) and the peeling film (102) to the paper substrate branch traction assembly (6), the peeling film branch traction assembly (7), and the corresponding buffer rewinding unit, respectively. Set the basic linear speed, unwinding side target tension, paper side target tension, film side target tension, peeling point allowable range, second threshold, and preset duration. S2, start the unwinding unit (2), composite roll main traction assembly (4), paper substrate branch traction assembly (6), peel film branch traction assembly (7), paper side buffer rewinding unit (11) and film side buffer recovery unit (12), establish the basic linear speed and unwinding side, paper side and film side tension; S3. Collect the detection signals of the first tension detection element (33), the second tension detection element (63), the third tension detection element (73), the peel point detection component (8), the paper-side floating compensation roller (111), and the film-side floating compensation roller (121) to obtain the unwinding side tension, paper-side tension, film-side tension, actual peel point position, and the positions of the two floating compensation rollers. S4. Adjust the unwinding unit (2) according to the detection result of the first tension detection element (33), and adjust the paper substrate branch traction assembly (6) and the peeling film branch traction assembly (7) respectively according to the detection results of the second tension detection element (63) and the third tension detection element (73) to perform local tension adjustment; S5. When the actual peeling point is within the allowable peeling point range, keep the position of the moving seat (55). When the actual peeling point is shortly outside the allowable peeling point range and the position deviation does not exceed the second threshold, continue to execute step S4. When the duration of the actual peeling point continuously exceeding the allowable peeling point range reaches the preset duration or the position deviation exceeds the second threshold, control the angle adjustment actuator (56) to drive the moving seat (55) to move along the arc guide rail (54), so that the center of the peeling film guide roller (53) moves along the arc trajectory with the nominal peeling point (103) as the center. S6. Adjust the paper-side winding drive (114) and the film-side winding drive (124) according to the positions of the paper-side floating compensation roller (111) and the film-side floating compensation roller (121) and the corresponding winding diameter. S7. Repeat steps S3-S6 until the stripping and rewinding of this volume is completed.

7. The peeling method according to claim 6, characterized in that, In step S2, the peeling film take-up shaft (122) is driven first to establish film-side pretension, and then the paper substrate take-up shaft (112) is driven to establish paper-side pretension. Subsequently, the unwinding unit (2) establishes unwinding-side pretension, and the paper-side floating compensation roller (111) and the film-side floating compensation roller (121) are in the preset middle range of their respective strokes before continuous operation is started.

8. The peeling method according to claim 6, characterized in that, The execution cycle of local tension adjustment in step S4 is less than the execution cycle of peel point position correction in step S5, and less than the update cycle of remote winding coordination control in step S6; within one local tension adjustment execution cycle, the basic linear speed of the composite roll main traction assembly (4) remains unchanged, and the paper substrate branch traction assembly (6) and the peel film branch traction assembly (7) are respectively superimposed with the limited speed correction amount according to the corresponding tension deviation.

9. The peeling method according to claim 6, characterized in that, In step S3, the detection results of the stripping point detection component (8) are judged for validity and filtered; when the image contrast is lower than the threshold, the number of boundary gradient peaks is abnormal, the detection position jump exceeds the physical allowable speed or the detection communication is interrupted, the corresponding detection results are marked as invalid, and the angle adjustment actuator (56) is not driven based on the invalid detection results; when the consecutive invalid results reach the preset number, the basic linear speed is reduced or a detection abnormality prompt is issued.

10. The peeling method according to claim 6, characterized in that, In step S6, when the angular velocity of the corresponding take-up shaft is higher than the preset angular velocity threshold, the current winding radius is determined based on the corresponding roll linear velocity and the angular velocity of the take-up shaft; when the angular velocity of the corresponding take-up shaft is not higher than the preset angular velocity threshold, the current winding radius is determined based on the core radius, the cumulative roll length, and the roll thickness, and the two winding radius determination results are smoothly switched when the angular velocity of the take-up shaft crosses the preset angular velocity threshold; the target torque of the corresponding take-up shaft is determined based on the target take-up tension, the current winding radius, the take-up shaft angular acceleration, and the tension deviation or the position of the floating compensation roller. ； ； ； Where Rᵢ is the current winding radius, vᵢ is the corresponding linear velocity of the roll, ωᵢ is the corresponding angular velocity of the take-up shaft, R0ᵢ is the corresponding core radius, hᵢ is the corresponding roll thickness, Lᵢ is the cumulative roll length starting from the current core, Mᵢ is the target torque, Tᵢ is the target take-up tension, Jᵢ is the equivalent moment of inertia of the take-up shaft and the current roll, dωᵢ / dt is the angular acceleration of the take-up shaft, and ΔMᵢ is the feedback correction amount formed based on the tension deviation or the position of the floating compensation roller.

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