Large film cutting equipment and film cutting method thereof

Abstract

The invention relates to the technical field of film cutting processing, and discloses large film cutting equipment and a film cutting method.The large film cutting equipment comprises a rack, a control console, an unwinding mechanism, a first flattening mechanism, a cutting mechanism, a second flattening mechanism and a winding mechanism, the first flattening mechanism is used for flattening materials unwound by the unwinding mechanism and conveying the materials to the cutting mechanism, and the second flattening mechanism is used for cutting the materials; the first flattening mechanism comprises a first bending roller, the middle of the first bending roller is convex, the two ends of the first bending roller are concave, and the first bending roller is arranged at the output end of the unwinding mechanism and rotationally connected to the rack. The second flattening mechanism is used for flattening the coiled material cut by the cutting mechanism and conveying the coiled material to the winding mechanism, the second flattening mechanism comprises a second bending roller, the middle of the second bending roller is convex, the two ends of the second bending roller are concave, and the second bending roller is arranged at the output end of the cutting mechanism and rotationally connected to the rack. The film cutting and winding device has the effect of meeting the film cutting and winding requirements.

Description

Technical Field

[0001] This invention relates to the technical field of thin film cutting and processing, specifically to a large-scale thin film cutting device and its cutting method. Background Technology

[0002] As a multifunctional material, large-format films have rapidly expanded their applications across various industries, playing a vital role not only in traditional construction and agriculture but also demonstrating enormous potential in emerging sectors such as electronics, medicine, and environmental protection. Through their lightweight, durable, and flexible properties, large-format films can meet diverse and complex needs, thereby driving continuous technological advancements and innovative applications.

[0003] In existing film cutting equipment, when cutting film materials, the control console controls the unwinding roller of the unwinding mechanism to rotate at the unwinding seat, thereby unwinding the film roll. The unwound film material then undergoes edge trimming by the cutting mechanism. Simultaneously, the control console controls the take-up roller of the unwinding mechanism to rotate at the take-up seat, thereby rewinding the cut film. During the unwinding to take-up process, the film is stably conveyed by conveyor rollers to achieve the film winding operation. However, when the film material thickness is too thin, such as 0.0025-0.01mm... When winding PP or PET films within a certain thickness range, existing film cutting equipment cannot meet the film processing requirements. Specifically, during the conveying and tensioning process of the film material on the conveyor rollers, due to the material's insufficient softness and strength, local wrinkles are very likely to occur. This wrinkling phenomenon not only affects the flatness of the film surface, but also causes the film roll layers to not be evenly bonded during subsequent winding operations. As a result, the wound film roll has an uneven appearance and inconsistent roll tension, making it difficult to meet the strict winding quality requirements of downstream applications. Summary of the Invention

[0004] Based on the above, in order to meet the needs of film cutting and winding and improve winding quality, this application provides a large-scale film cutting equipment and its cutting method.

[0005] On the one hand, the large-scale film cutting equipment provided in this application adopts the following technical solution:

[0006] A large-scale film cutting device includes a frame, a control console, an unwinding mechanism, a cutting mechanism, and a rewinding mechanism. The unwinding mechanism, cutting mechanism, and rewinding mechanism are sequentially assembled on the frame along the material conveying direction and are all electrically connected to the control console. The device also includes:

[0007] The first flattening mechanism is electrically connected to the control console and is located between the unwinding mechanism and the cutting mechanism. It is used to flatten the material after it is unwound by the unwinding mechanism and convey it to the cutting mechanism. The first flattening mechanism includes a first bending roller, which is convex in the middle and concave at both ends. The first bending roller is located at the output end of the unwinding mechanism and is rotatably connected to the frame.

[0008] The second flattening mechanism is electrically connected to the control console and is located between the cutting mechanism and the winding mechanism. It is used to flatten the roll material cut by the cutting mechanism and convey it to the winding mechanism. The second flattening mechanism includes a second bending roller, which is convex in the middle and concave at both ends. The second bending roller is located at the output end of the cutting mechanism and is rotatably connected to the frame.

[0009] As an optional technical solution for large-scale film cutting equipment, the second flattening mechanism is provided in multiple sets, all of which are located between the cutting mechanism and the winding mechanism.

[0010] As an optional technical solution for large-scale film cutting equipment, the first flattening mechanism also includes a first driven roller, a second driven roller, and a first driving member. The first driven roller and the second driven roller are both rotatably connected to the frame, and the first driven roller, the first bending roller, and the second driven roller are arranged sequentially along the roll material conveying direction. The first driving member is used to drive the first bending roller to rotate, and the first driving member is electrically connected to the control console.

[0011] As an optional technical solution for large-scale film cutting equipment, the output end of the first drive component is equipped with a first transmission mechanism, the frame is rotatably connected to a first drive roller, the first drive roller and the first bending roller rotate synchronously through the first transmission mechanism, and the first drive roller is located between the second driven roller and the cutting mechanism.

[0012] As an optional technical solution for large-scale film cutting equipment, the second flattening mechanism also includes a driven pressure roller, a second driving roller, and a second driving component. The driven pressure roller and the second driving roller are rotatably connected to the frame. The output end of the second driving component is equipped with a second transmission mechanism. The second driving roller and the second bending roller rotate synchronously through the second transmission mechanism. The driven pressure roller, the second bending roller, and the second driving roller are arranged sequentially along the material conveying direction.

[0013] As an optional technical solution for large-scale film cutting equipment, the second bending roller is equipped with an adjustment component, which is used to adjust the height of the protrusion in the middle of the second bending roller.

[0014] As an optional technical solution for large-scale film cutting equipment, the cutting mechanism includes a tool guide rail, a slitting blade, a cutting drive component, and a cutting roller. The tool guide rail is rotatably connected to the frame, the slitting blade is slidably connected to the tool guide rail, the cutting drive component is mounted on the frame and electrically connected to the control console, the output end of the cutting drive component is connected to the cutting roller, the cutting roller is rotatably connected to the frame, the cutting roller has an annular groove, and the blade disc of the slitting blade is inserted into the annular groove.

[0015] As an optional technical solution for large-scale film cutting equipment, the unwinding mechanism is slidably connected to the frame. The frame is equipped with a web-correcting probe, a web-correcting controller, and a web-correcting drive. The web-correcting probe is electrically connected to the web-correcting controller, the web-correcting controller is electrically connected to the control console, and the web-correcting drive is electrically connected to the control console. The web-correcting drive is used to drive the unwinding mechanism to slide on the frame.

[0016] As an optional technical solution for large-scale film cutting equipment, the frame is rotatably connected to a central split shaft. Along the material conveying direction, the central split shaft is located between the second flattening mechanism and the winding mechanism. The central split shaft is used to press the material in a concave shape between the second flattening mechanism and the winding mechanism. The winding mechanism is slidably connected to the frame. The frame is equipped with a discharge drive component, which is used to drive the winding mechanism to move closer to or away from the central split shaft.

[0017] On the other hand, the large-scale film cutting method provided in this application adopts the aforementioned large-scale film cutting equipment.

[0018] A method for cutting large-scale thin films includes the following steps:

[0019] S1: The roll material is assembled into the unwinding mechanism. The unwinding mechanism is started, and the unwinding mechanism unwinds the roll material.

[0020] S2: The unwound material is flattened by the first flattening mechanism. Under the action of the first bending roller, the protruding part of the first bending roller expands the material radially.

[0021] S3: The flattened material is conveyed to the cutting mechanism for cutting;

[0022] S4: The cut material is flattened by the second flattening mechanism. Under the action of the second bending roller, the protruding part of the second bending roller expands the material radially.

[0023] S5: The flattened material is conveyed to the winding mechanism for winding;

[0024] S6: Reel in the roll.

[0025] This invention application includes at least the following beneficial effects:

[0026] 1. The structure, consisting of "unwinding mechanism → first flattening mechanism → cutting mechanism → second flattening mechanism → rewinding mechanism" assembled sequentially along the conveying direction, forms a continuous process of "unwinding-flattening-cutting-reflattening-rewinding". The material is initially flattened by the first curved roller (convex in the middle and concave at both ends). The curved surface applies radial tension to the material, eliminating wrinkles generated during unwinding. At the same time, a second flattening mechanism is set at the rear end of the cut. The second curved roller in the second flattening mechanism also flattens the material radially, so that the material is in a stable flattened state during cutting, reducing the possibility of cutting deviation due to wrinkles, and ensuring that the material remains flat before rewinding. This solves the problem of film wrinkles after cutting in traditional equipment and meets the requirements of film cutting and rewinding.

[0027] 2. The system employs a sequential arrangement of "first driven roller - first curved roller - second driven roller" to form a stable material conveying path. The first driving component drives the first curved roller to rotate actively, propelling the film forward synchronously through friction. Simultaneously, the central convex structure applies radial expansion force to the film, causing the material to spread out to both sides. The first and second driven rollers rotate passively, generating reverse friction. This, combined with the active driving force of the first curved roller, forms a dynamic balance of "active traction - passive tension." The actively rotating first curved roller provides continuous and stable conveying power, reducing material accumulation or stagnation caused by insufficient driving force. The passively rotating first and second driven rollers exert slight tension on the film edges through reverse friction, further enhancing the radial flattening effect. At the same time, the passive rotation characteristic adaptively adjusts the film tension, reducing local tension abrupt changes caused by fluctuations in the speed of the active roller. The synergistic direction of both rollers ensures that the film maintains a stress state of "push in the center - tension at the edges" throughout the conveying process, effectively eliminating wrinkles and improving flatness, providing a stable material foundation for subsequent cutting processes.

[0028] 3. Setting up multiple sets of second flattening mechanisms before winding helps to further optimize the flatness of the film during the transport process. The introduction of multiple sets of second flattening mechanisms can adjust the surface state of the film in stages, gradually eliminate residual micro-wrinkles and stress concentration areas, and improve the uniformity and consistency of the flattening effect. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 for Figure 2Enlarged view at point B in the middle;

[0033] Figure 5 for Figure 3 Enlarged image from C;

[0034] In the picture:

[0035] 1. Frame; 11. Control console; 2. Unwinding mechanism; 3. First flattening mechanism; 31. First flexible sleeve; 32. First driven roller; 33. Second driven roller; 34. First driving roller; 4. Cutting mechanism; 41. Tool guide rail; 42. Slitting knife; 43. Cutting roller; 431. Annular groove; 5. Second flattening mechanism; 51. Second flexible sleeve; 52. Driven pressure roller; 53. Second driving roller; 6. Rewinding mechanism; 7. Correction probe; 71. Correction controller; 72. Correction drive component; 8. Bending rod section; 81. Drive section; 82. Adjusting handwheel; 9. Center split shaft. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0039] On the one hand, embodiments of this application disclose a large-scale film cutting device.

[0040] Reference Figure 1 and Figure 2A large-scale film cutting device includes a frame 1, a control console 11, an unwinding mechanism 2, a first flattening mechanism 3, a cutting mechanism 4, a second flattening mechanism 5, and a winding mechanism 6. The unwinding mechanism 2, the first flattening mechanism 3, the cutting mechanism 4, the second flattening mechanism 5, and the winding mechanism 6 are sequentially assembled on the frame 1 along the material conveying direction and are all electrically connected to the control console 11. The control console 11 is fixedly mounted on one side of the frame 1. The first flattening mechanism 3 is located between the unwinding mechanism 2 and the cutting mechanism 4, and is used to flatten the material unwound by the unwinding mechanism 2 and convey it to the cutting mechanism 4. Specifically, the first flattening mechanism 3 includes a first bending roller. Figure 3 The outer wall of the first bending roller is covered with a first flexible sleeve 31. The first bending roller is convex in the middle and concave at both ends. The first bending roller is located at the output end of the unwinding mechanism 2 and is rotatably connected to the frame 1. The second flattening mechanism 5 is located between the cutting mechanism 4 and the winding mechanism 6. It is used to flatten the roll material cut by the cutting mechanism 4 and convey it to the winding mechanism 6. Specifically, the second flattening mechanism 5 includes a second bending roller. The outer wall of the second bending roller is covered with a second flexible sleeve 51. The second bending roller is convex in the middle and concave at both ends. The second bending roller is located at the output end of the cutting mechanism 4 and is rotatably connected to the frame 1.

[0041] When the film is being cut, the control console 11 controls the unwinding mechanism 2 to unwind the film roll. After unwinding, the film passes through the first flattening mechanism 3 to flatten it, eliminating wrinkles or bends caused by winding and ensuring that the film enters the cutting mechanism 4 in a flat state. This reduces the possibility of cutting position deviation or uneven blade depth caused by wrinkles. After cutting, the film immediately enters the second flattening mechanism 5, which can quickly eliminate edge warping or local shrinkage caused by cutting stress and reduce wrinkles caused by deformation during material transport. The flattening mechanisms at both ends of the cutting mechanism 4 form a "pre-treatment-cutting-instant correction" process. The closed-loop control system employs a first flattening mechanism 3 at the front end to apply radial expansion force to the film via a first curved roller with a central protrusion. This ensures uniform distribution of lateral tension in the material, guaranteeing complete adhesion between the film and the surface of the cutting roller 43 during cutting and improving the cutting stability of the slitting blade 42. Simultaneously, the second flattening mechanism 5 at the rear end performs micro-tension calibration on the cut film via a second curved roller with an adjustable protrusion height, suppressing elastic shrinkage of the cut surface. Finally, the flattened film is wound up by the winding mechanism 6, improving the material's flatness before winding and solving the problem of wrinkles appearing during film winding after cutting in traditional equipment. This system meets the requirements for film cutting and winding.

[0042] To further improve the flatness of the film winding, the second flattening mechanism 5 is provided in multiple sets, all of which are located between the cutting mechanism 4 and the winding mechanism 6, and are equidistantly arranged circumferentially along the material conveying direction.

[0043] Reference Figure 4The unwinding mechanism 2's unwinding seat is slidably connected to the frame 1. The frame 1 is fixedly equipped with a correction probe 7, a correction controller 71, and a correction drive 72. The correction probe 7 is electrically connected to the correction controller 71, the correction controller 71 is electrically connected to the control console 11, and the correction drive 72 is electrically connected to the control console 11. The correction drive 72 is mounted on the frame 1 and is used to drive the unwinding seat of the unwinding mechanism 2 to slide on the frame 1. The correction probe 7 detects the position of the film edge during the film unwinding process to pick up the edge position deviation signal, and then transmits the position deviation signal to the correction controller 71 for logical operation. The operation result is fed back to the control console 11, and the control console 11 sends a control signal to the correction drive 72 to drive the correction drive 72 to drag the unwinding seat of the unwinding mechanism 2 to slide on the frame 1, so as to correct the position deviation of the unwinding mechanism 2 during film unwinding and improve the cutting quality. Preferably, in this embodiment, the correction drive 72 is an electric cylinder.

[0044] When the material is unwound, the control console 11 controls the unwinding mechanism 2 to unwind the film roll. At the same time, the web-aligning probe 7 monitors the edge position of the film in real time to ensure that the film maintains a precise centering state during the conveying process. If the film deviates, the web-aligning probe 7 will immediately capture this change and transmit the signal to the web-aligning controller 71. The web-aligning controller 71 performs rapid calculations based on the received signal, generates adjustment instructions, and sends them to the control console 11. The control console 11 then sends an operation signal to the web-aligning drive 72, which drives the electric cylinder to push the unwinding seat to slide along the frame 1, thereby realizing dynamic correction of the film position, reducing the quality problems caused by film deviation, and providing reliable assurance for subsequent cutting and winding processes.

[0045] Specifically, the first flattening mechanism 3 also includes a first driven roller 32, a second driven roller 33 and a first driving member. The first driven roller 32 and the second driven roller 33 are both rotatably connected to the frame 1, and the first driven roller 32, the first bending roller and the second driven roller 33 are arranged sequentially along the roll material conveying direction. The first driving member is used to drive the first bending roller to rotate. The first driving member is electrically connected to the control console 11. Preferably, in this embodiment, the first driving member is a drive motor.

[0046] The output end of the first driving component is equipped with a first transmission mechanism. The frame 1 is rotatably connected to a first active roller 34. The first active roller 34 and the first bending roller rotate synchronously through the first transmission mechanism. The first active roller 34 is located between the second driven roller 33 and the cutting mechanism 4. Preferably, in this embodiment, the first transmission mechanism adopts a belt transmission structure, which drives the first active roller 34 and the first bending roller to rotate synchronously.

[0047] Furthermore, the frame 1 is rotatably connected to a tension roller 331. Tension sensors 332 are provided at both ends of the tension roller 331. The tension sensors 332 are used to detect the tension of the conveyed film and transmit the tension signal to the control console 11, so as to facilitate real-time monitoring and adjustment of the tension of the film. The tension roller 331 is located between the second driven roller 33 and the first driving roller 34.

[0048] Reference Figure 2 and Figure 5 The cutting mechanism 4 includes a tool guide rail 41, a slitting blade 42, a cutting drive component, and a cutting roller 43. The tool guide rail 41 is rotatably connected to the frame 1, and the slitting blade 42 is slidably connected to the tool guide rail 41. The cutting drive component is mounted on the frame 1 and electrically connected to the control console 11. The output end of the cutting drive component is fixedly connected to the cutting roller 43. Preferably, in this embodiment, the cutting drive component is a motor, and the cutting roller 43 is rotatably connected to the frame 1, thereby driving the cutting roller 43 to rotate on the frame 1 through the cutting drive component. Also preferably, in this embodiment, the tool guide rail 41 is rotatably connected to the frame 1 through a motor. Furthermore, the cutting roller 43 has an annular groove 431, and the blade disc of the slitting blade 42 is inserted into the annular groove 431 to cut the film. Along the axial direction of the cutting roller 43, there are multiple annular grooves 431, which are symmetrically arranged at both ends, suitable for cutting films with various different requirements, thus improving applicability.

[0049] The second flattening mechanism 5 also includes a driven pressure roller 52, a second driving roller 53, and a second driving member. The driven pressure roller 52 and the second driving roller 53 are both rotatably connected to the frame 1. The output end of the second driving member is equipped with a second transmission mechanism. Preferably, in this embodiment, the second driving member is a drive motor. The second driving roller 53 and the second bending roller rotate synchronously through the second transmission mechanism. Preferably, in this embodiment, the second transmission mechanism is a belt conveyor structure. The driven pressure roller 52, the second bending roller, and the second driving roller 53 are arranged sequentially along the material conveying direction. The film is wound from the bottom of the driven pressure roller 52 to the top of the second bending roller and then conveyed to the top of the second driving roller 53. The film conveyed to the top of the second driving roller 53 is wound to the bottom of the driven pressure roller 52 of the next set of second flattening mechanisms 5 until the film is conveyed to the winding mechanism 6 for winding through the second driving roller 53 of the last set of second flattening mechanisms 5.

[0050] Furthermore, to improve the flattening effect of the second bending roller, the horizontal height of the top wall tangent at both ends of the second bending roller is higher than that of the second drive roller 53.

[0051] Specifically, refer to Figure 3The second bending roller includes a bending rod portion 8 and a driving portion 81. The bending rod portion 8 is in the shape of a bent tube. The driving portion 81 is rotatably connected to both ends of the bending rod portion 8 and is cylindrical. One of the driving portions 81 is synchronously driven to the second drive roller 53 through a second transmission mechanism. The bending rod portion 8 is fitted with multiple bearings, which are distributed along the extension direction of the bending rod portion 8. The outer wall of the bending rod portion 8 is fixedly connected to the inner wall of the bearings. The number of bearings is multiple and equidistantly distributed along the axial direction of the bending rod portion 8. The number of bearings can be adjusted according to the actual accuracy requirements. A second flexible sleeve 51 is fitted onto the bending rod portion 8. The two ends of 1 are fixedly connected to the two drive units 81 respectively. The inner wall of the second flexible sleeve 51 is fixedly connected to the outer wall of the bearing, so that the bent rod part 8 can support the second flexible sleeve 51. At the same time, it is convenient for the drive unit 81 to drive the bearing to rotate stably through the second flexible sleeve 51, thereby driving the second flexible sleeve 51 to rotate. In this embodiment, the second flexible sleeve 51 is made of rubber. The bearings at both ends of the bent rod part 8 in the axial direction are fixedly connected to the drive unit 81, so that the drive unit 81 can be driven. When the second transmission mechanism drives the drive unit 81 to rotate, the drive unit 81 drives the flexible part to rotate through the linkage part.

[0052] To improve the rotational stability of the second flexible sleeve 51, the bending arc of the bent rod portion 8 is small. Specifically, the arc length of the bent rod portion 8 is less than one-eighth of the arc length of the whole circle, reducing the possibility of the membrane breaking due to the large arch of the bent rod portion 8.

[0053] Along the material conveying direction, the most arched end of the bent rod 8 is inclined toward the rear end of the material conveying direction, so that the material is stretched through the second flexible sleeve 51, further improving the flattening effect of the film.

[0054] Furthermore, the second bending roller is provided with an adjustment component, which is used to adjust the height of the protrusion in the middle of the second bending roller. Specifically, the adjustment component includes an adjustment handwheel 82, which is used to drive the bending rod part 8 to rotate. Preferably, in this embodiment, the adjustment handwheel 82 drives the bending rod part 8 to rotate through a worm gear. The structure and function of the first bending roller are the same as those of the second bending roller, and will not be described in detail here. Both the first bending roller and the second bending roller are provided with an adjustment component for adjustment, and the functions are the same, and will not be described in detail here either.

[0055] The frame 1 is rotatably connected to a center split shaft 9. Along the material conveying direction, the center split shaft 9 is located between the second flattening mechanism 5 and the winding mechanism 6. The center split shaft 9 is used to press the material in a concave shape between the second flattening mechanism 5 and the winding mechanism 6, effectively guiding the film and reducing the possibility of wrinkling when the film is wound. The winding mechanism 6 is slidably connected to the frame 1. The frame 1 is equipped with a discharge drive component, which is used to drive the winding mechanism 6 to move closer to or away from the center split shaft 9. Preferably, in this embodiment, the discharge drive component is a cylinder.

[0056] On the other hand, using the aforementioned large-scale film cutting equipment, this application discloses a large-scale film cutting method.

[0057] A method for cutting large-scale thin films includes the following steps:

[0058] S1: The roll material is assembled into the unwinding mechanism 2. The unwinding mechanism 2 is started, and the unwinding mechanism 2 unwinds the roll material.

[0059] Specifically, after the material passes through the unwinding mechanism 2, the control console 11 receives the material edge position signal collected by the correction probe 7 in real time. When the lateral offset of the material is detected to exceed ±0.2mm, the correction controller 71 immediately triggers the correction drive 72, which drives the unwinding seat of the unwinding mechanism 2 to slide laterally along the frame 1 for dynamic position calibration. The correction probe 7 uses an infrared through-beam sensor, which can identify the grayscale difference of the material edge to form a position feedback signal. After the control console 11 compares the signal with the preset reference value, it controls the correction drive 72 (electric cylinder) to move the unwinding mechanism 2 to ensure that the material edge is always aligned with the reference positioning line of the cutting mechanism 4. This closed-loop correction system has a response time of ≤50ms and can stably control the lateral offset of the material within the range of ±0.1mm, effectively avoiding the cutting trajectory offset caused by uneven unwinding tension or eccentricity of the roll material, and ensuring the consistency of the width tolerance of the multi-component cut strip.

[0060] S2: The unwound material is flattened by the first flattening mechanism 3. Under the action of the first bending roller, the protruding position of the first bending roller expands the material radially.

[0061] Specifically, after the unwound material is corrected, it enters the first flattening mechanism 3 for flattening. The first flattening mechanism 3 adjusts the angle and pressure of the first bending roller and adjusts the arched end of the first bending roller. By rotating the first bending roller, the arched end of the first bending roller is tilted at the end of the material conveying direction and tilted towards the bottom. After the material is unwound from the unwinding mechanism 2, it passes through the first driven roller 32, the first bending roller and the second driven roller 33 in sequence for three flattening and unfolding processes to eliminate the deformation caused by the uneven initial state of the roll material or the unwinding process.

[0062] S3: The flattened material is conveyed to the cutting mechanism 4 for cutting;

[0063] Specifically, the position of the slitting blade 42 on the tool guide rail 41 is adjusted to determine the cutting point. By rotating the tool guide rail 41, the slitting blade 42 is inserted into the annular groove 431. When the film material passes through the cutting roller 43, the slitting blade 42 cuts the material.

[0064] S4: The cut material is flattened by the second flattening mechanism 5. Under the action of the second bending roller, the protruding position of the second bending roller expands the material radially.

[0065] Specifically, the second flattening mechanism 5 adjusts the position and angle of the second bending roller so that the material can be further flattened after cutting. Along the material conveying direction, the second bending roller of the first end of the second flattening mechanism 5 is fixed in a rotating and inclined position. Specifically, the most arched end of the second bending roller is inclined towards the rear end of the material conveying direction and towards the top. When the protruding part of the second bending roller contacts the material, an appropriate radial force is applied. At the same time, when the second flexible sleeve 51 of the second bending roller expands outward, it drives the film material to expand outward, ensuring that wrinkles and minor deformations on the material surface are effectively eliminated.

[0066] S5: The flattened material is conveyed to the winding mechanism 6 for winding;

[0067] S6: Reel in the roll.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A large-scale film cutting device, characterized in that, The system includes a frame (1), a control console (11), an unwinding mechanism (2), a cutting mechanism (4), and a winding mechanism (6). The unwinding mechanism (2), the cutting mechanism (4), and the winding mechanism (6) are sequentially assembled on the frame (1) along the material conveying direction and are all electrically connected to the control console (11). It also includes: The first flattening mechanism (3) is electrically connected to the control console (11) and is located between the unwinding mechanism (2) and the cutting mechanism (4). It is used to flatten the material after it is unwound by the unwinding mechanism (2) and to convey it to the cutting mechanism (4). The first flattening mechanism (3) includes a first bending roller. The first bending roller is convex in the middle and concave at both ends. The first bending roller is located at the output end of the unwinding mechanism (2) and is rotatably connected to the frame (1). The second flattening mechanism (5) is electrically connected to the control console (11) and is located between the cutting mechanism (4) and the winding mechanism (6). It is used to flatten the roll material cut by the cutting mechanism (4) and convey it to the winding mechanism (6). The second flattening mechanism (5) includes a second bending roller. The second bending roller is convex in the middle and concave at both ends. The second bending roller is located at the output end of the cutting mechanism (4) and is rotatably connected to the frame (1).

2. The large-scale film cutting equipment according to claim 1, characterized in that, The second flattening mechanism (5) has multiple sets, all of which are located between the cutting mechanism (4) and the winding mechanism (6).

3. A large-scale film cutting device according to claim 1, characterized in that, The first flattening mechanism (3) also includes a first driven roller (32), a second driven roller (33) and a first driving member. The first driven roller (32) and the second driven roller (33) are rotatably connected to the frame (1). The first driven roller (32), the first bending roller and the second driven roller (33) are arranged sequentially along the roll material conveying direction. The first driving member is used to drive the first bending roller to rotate. The first driving member is electrically connected to the control console (11).

4. A large-scale film cutting device according to claim 3, characterized in that, The output end of the first drive component is equipped with a first transmission mechanism. The frame (1) is rotatably connected to a first active roller (34). The first active roller (34) and the first bending roller rotate synchronously through the first transmission mechanism. The first active roller (34) is located between the second driven roller (33) and the cutting mechanism (4).

5. A large-scale film cutting device according to any one of claims 1-4, characterized in that, The second flattening mechanism (5) also includes a driven pressure roller (52), a second driving roller (53), and a second driving member. The driven pressure roller (52) and the second driving roller (53) are rotatably connected to the frame (1). The output end of the second driving member is equipped with a second transmission mechanism. The second driving roller (53) and the second bending roller rotate synchronously through the second transmission mechanism. The driven pressure roller (52), the second bending roller, and the second driving roller (53) are arranged in sequence along the material conveying direction.

6. A large-scale film cutting device according to claim 1, characterized in that, The second bending roller is equipped with an adjustment component, which is used to adjust the height of the protrusion in the middle of the second bending roller.

7. A large-scale film cutting device according to claim 1, characterized in that, The cutting mechanism (4) includes a tool guide rail (41), a slitting blade (42), a cutting drive and a cutting roller (43). The tool guide rail (41) is rotatably connected to the frame (1), the slitting blade (42) is slidably connected to the tool guide rail (41), the cutting drive is mounted on the frame (1) and electrically connected to the control console (11), the output end of the cutting drive is connected to the cutting roller (43), the cutting roller (43) is rotatably connected to the frame (1), the cutting roller (43) has an annular groove (431), and the blade disc of the slitting blade (42) is inserted into the annular groove (431).

8. A large-scale film cutting device according to claim 1, characterized in that, The unwinding mechanism (2) is slidably connected to the frame (1). The frame (1) is equipped with a correction probe (7), a correction controller (71) and a correction drive (72). The correction probe (7) is electrically connected to the correction controller (71), the correction controller (71) is electrically connected to the control console (11), and the correction drive (72) is electrically connected to the control console (11). The correction drive (72) is used to drive the unwinding mechanism (2) to slide on the frame (1).

9. A large-scale film cutting device according to claim 1, characterized in that, The frame (1) is rotatably connected to a center split shaft (9). Along the material conveying direction, the center split shaft (9) is located between the second flattening mechanism (5) and the winding mechanism (6). The center split shaft (9) is used to press the material in a concave shape between the second flattening mechanism (5) and the winding mechanism (6). The winding mechanism (6) is slidably connected to the frame (1). The frame (1) is equipped with a discharge drive component, which is used to drive the winding mechanism (6) to move closer to or away from the center split shaft (9).

10. A method for cutting large-scale thin films, using the large-scale thin film cutting equipment described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The roll material is assembled into the unwinding mechanism (2). The unwinding mechanism (2) is started, and the unwinding mechanism (2) unwinds the roll material. S2: The unwound material is flattened by the first flattening mechanism (3). Under the action of the first bending roller, the protruding position of the first bending roller expands the material radially. S3: The flattened material is conveyed to the cutting mechanism (4) for cutting; S4: The cut material is flattened by the second flattening mechanism (5). Under the action of the second bending roller, the protruding position of the second bending roller expands the material radially. S5: The flattened material is conveyed to the winding mechanism (6) for winding; S6: Reel in the roll.

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