A method of film scrap disposal
By adding blades to cut edge material during the film slitting process and using a guide wheel structure, the problems of edge material not being able to be sucked up in time and uneven blade wear are solved, achieving efficient edge material recycling and improved blade utilization, and simplifying the blade maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING WANTONG PLASTIC FILM CO LTD
- Filing Date
- 2023-09-12
- Publication Date
- 2026-06-09
Smart Images
Figure CN117124369B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of thin film production technology, and more specifically to a method for processing thin film edge material. Background Technology
[0002] In existing technologies, films are formed through methods such as blow molding, calendering, and casting. After film formation, to meet order requirements, the film is slit into the required specifications (width) and then wound up. To ensure that the quality and specifications of the wound film meet the requirements, the material on both sides of the film edge is usually cut off. The material cut off from the edge is called edge material. The blades used for cutting edge material are the same as those used for slitting to meet different specifications. The difference is that the film between the two edge materials is wound up into a finished product (the film between the edge materials is also called the main material), while the edge material is sucked into a crusher by a negative pressure suction tube for crushing. The crushed material is then sent to granulation or directly to a feeder to achieve the recycling and reuse of edge material (such as the edge material recycling method shown in a plastic film edge material recycling system with patent publication number CN216682899U).
[0003] However, there are currently some problems in film slitting:
[0004] First, the width of the edge material varies depending on the requirements of different finished product specifications. Sometimes, the width of the edge material may exceed the inner diameter of the negative pressure suction tube, or even exceed it by a large margin, which may cause the negative pressure suction tube to be unable to suck up the edge material in time.
[0005] Secondly, multiple blades are used in film slitting. After a period of use, the blades will become dull and need to be replaced. For blades with non-adjustable cutting positions, the blade needs to be replaced once it becomes dull. However, the angle between the blade and the film is often fixed during the cutting process, meaning that the dulling only occurs in a localized area of the blade. In this case, there is a waste of blade usage, resulting in frequent blade replacements and increased blade costs.
[0006] Existing technologies include structures that allow adjustment of the blade's extension length from the blade holder. By adjusting the blade's extension length relative to the blade holder, the unblunted portion of the blade can still be used for slitting, thus improving blade utilization. However, because each film production equipment often has multiple blade holders to meet different finished product width requirements, and each blade is equipped with a blade, each machine has multiple blades. Furthermore, each blade requires multiple adjustments to its extension length during use to improve blade utilization, increasing the cumulative time workers spend adjusting the blades.
[0007] Third, because there are many blades installed on the equipment, only a portion of the blades on the blade holder are often used each time. Workers cannot accurately remember the usage time of each blade. Therefore, workers need to carefully check the wear of the blades each time they adjust the blades. Different workers have different understandings of whether the wear has reached the standard for adjustment or replacement. This results in some blades being used even when they are no longer usable, affecting the slitting quality of the film; while some blades may not have reached the point where they need to be replaced or adjusted, but they are adjusted or replaced anyway, reducing the utilization rate of the blades. Summary of the Invention
[0008] The present invention aims to provide a method for processing film edge material, so as to solve the problem in the prior art that the edge material cannot be sucked away in time when the width of the edge material exceeds the inner diameter of the negative pressure suction tube.
[0009] To achieve the above objectives, the present invention adopts the following technical solution:
[0010] A method for processing film edge material involves feeding the edge material to a shredder via a negative pressure suction tube. When the width of the edge material is greater than the inner diameter of the negative pressure suction tube, additional blades are added to cut the edge material, ensuring that the widest dimension of the cut edge material does not exceed the inner diameter of the negative pressure suction tube. A freely rotating guide wheel is installed above the negative pressure suction tube, and two baffles are installed along the length of the guide wheel, with the space between the two baffles used for the edge material to pass through.
[0011] The principle and advantages of this scheme are:
[0012] The inventors investigated the problem of edge material not being promptly sucked up when its width exceeds the inner diameter of the negative pressure suction tube. They discovered that in practical applications, the width of the edge material is primarily determined by the width of the main material of the finished product to be wound. Subtracting the width of the main material from the overall width of the film leaves the edge material width. Since the width of the main material varies with order requirements, the edge material width also varies, and the edge material is often one strip on each side of the main material. When the edge material is wide, it cannot fully unfold within the negative pressure suction tube and easily comes into contact with the inner wall, causing friction. The wider the edge material, the larger the frictional contact area, resulting in the negative pressure suction tube failing to suck up the edge material promptly.
[0013] This invention adds blades to slit the edge material, changing the original situation where there was only one edge material on each side. By slitting the edge material, edge material with a width greater than the inner diameter of the negative pressure suction tube on one side can be cut into at least two pieces, ensuring that the width of each edge material entering the negative pressure suction tube is narrower than the inner diameter of the negative pressure suction tube. At the same time, the setting of guide wheels and baffles allows multiple edge materials to enter the negative pressure suction tube within a limited area. This ensures that even edge materials with a relatively wide cumulative width can be stacked under the restriction of the baffles and the rotation of the guide wheels. Since the film edge material is extremely thin, the stacked edge materials can enter the negative pressure suction tube as a whole along the guide wheels, greatly reducing or even avoiding the problem of edge materials not being sucked away in time due to contact with the inner wall of the negative pressure suction tube because of excessive cumulative width.
[0014] In addition, the guide wheel design prevents the edge material from rubbing against the edge of the negative pressure straw when it enters the straw. Instead, the material enters the straw under the free-rotating guide wheel, reducing frictional wear caused by the movement of the edge material and greatly delaying or even avoiding the problem of existing negative pressure straws rusting quickly at the straw opening due to long-term friction.
[0015] Preferably, as an improvement, the negative pressure suction tube and guide wheel are mounted on a slider, which is capable of moving along the width of the film.
[0016] Beneficial effects: This solution, by setting up a slider that can move along the width of the film, allows the position of the negative pressure suction tube to be adjusted, thereby meeting the edge recycling needs of films of different widths.
[0017] Preferably, as an improvement, when the blade is cutting the film, the blade is mounted on a corresponding blade holder, the film is continuously wound up by the take-up roller, and at the same time the blade for cutting the film moves back and forth relative to the blade holder, the direction of movement of the blade is the length direction of the blade edge.
[0018] Beneficial effects: In this design, the blade moves back and forth along its length. Since the film is tensioned by the guide roller, the reciprocating movement of the blade does not affect the film slitting quality, provided the blade quality is acceptable. Furthermore, the reciprocating movement of the blade ensures that the wear on the cutting edge is essentially uniform along its length. The blade only needs to be fixed once for use; upon disassembly, the blades will have reached a similar wear level along their length. Disassembly at this point is for replacing the blade. Therefore, compared to existing technologies, the blades on the blade holder in this design only need to be installed once and can be used until final replacement. This eliminates the need for frequent blade position adjustments by workers, reducing the time spent on blade adjustments.
[0019] Preferably, as an improvement, a counter is used to record the cumulative number of reciprocating movements of the blade during the blade's reciprocating movement.
[0020] Beneficial effects: This solution records the cumulative number of reciprocating cycles of the blade using a counter, directly quantifying the blade's usage through this count. This enables the monitoring of the remaining lifespan of the blade. Workers can determine whether the blade needs to be replaced based on the expected cumulative number of uses, eliminating the need for workers to meticulously check the blade's wear condition each time the slitting specifications are adjusted, as is the existing technology. This avoids the problem of continued use of worn blades that result in poor film slitting quality, as well as the problem of low blade utilization caused by replacing blades before they reach wear.
[0021] Preferably, as an improvement, the blade is fixedly mounted on the slide rod, which is slidably connected to the blade holder. The sliding direction of the slide rod is the length direction of the blade, and the reciprocating movement of the slide rod is driven by a cam mechanism.
[0022] Beneficial effects: This solution uses a simple cam structure to facilitate the reciprocating movement of the blade.
[0023] Preferably, as an improvement, a rotating seat is rotatably connected to the blade holder, and a slide rod is slidably connected to the rotating seat. A limiting member is fixed on the blade holder to limit the rotation of the rotating seat. A support block is also fixed on the blade holder. When the blade is not used to cut the film, the limiting member is removed from limiting the rotation of the rotating seat, so that the rotating seat rotates until the slide rod on the rotating seat is placed vertically on the support block.
[0024] Beneficial effects: When the blade needs to be used for slitting film, this solution can limit the rotation of the rotating seat by a limiting component, so that the rotating seat rotates to the sliding direction of the slide bar, which drives the blade to reciprocate, ensuring the normal operation of the blade. When the blade does not need to slitting film, it is not necessary to disassemble the blade. At this time, it is only necessary to control the rotating seat to detach from the limiting component and rotate the rotating seat until the slide bar is supported by the support block. The slide bar supported by the support block is in a vertical state. In this state, the weight of the slide bar is entirely on the support block, and there is basically no compression between the slide bar and the sliding track of the rotating seat. This ensures that even if the blade is not used for a long time, it will not affect the smoothness of the slide bar in future use, which is conducive to improving the service life of the slide bar and the rotating seat.
[0025] Preferably, as an improvement, the cam mechanism includes a rotatable cam, and an elastic element is provided between the slide bar and the rotary seat to push the slide bar toward the cam, and all blades share a single cam during reciprocating movement.
[0026] Preferably, as an improvement, the cam is connected to the guide roller drive on the film winding equipment so that the rotation of the cam does not require a separate power source, thus reducing production costs.
[0027] Preferably, as an improvement, the edge material on the same side can be cut simultaneously by up to three spaced blades, with the three blades fixed on the same slide bar.
[0028] Preferably, as an improvement, the three blades mounted on the same slide bar are respectively installed in the middle and on both sides of the slide bar. The three blades are fixedly installed by the same bolt and nut, which simplifies the ease of disassembly and assembly of the three blades used for edge material cutting. Attached Figure Description
[0029] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.
[0030] Figure 2 for Figure 1 A three-dimensional structural diagram of the slitting device after the film has been removed.
[0031] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the diagram.
[0032] Figure 4 for Figure 2 The diagram only shows the connection relationship between the slide rail, the tool holder, and the blade.
[0033] Figure 5 for Figure 4 The main view.
[0034] Figure 6 for Figure 4 Right sectional view.
[0035] Figure 7 for Figure 4 Enlarged schematic diagram of part B in the diagram.
[0036] Figure 8 for Figure 7 A schematic diagram showing the connection relationship between the middle slide bar, the rotating seat, and the limit bar.
[0037] Figure 9 This is a schematic diagram of the structure when three blades are installed on the slide bar.
[0038] Figure 10 for Figure 2 The image shows a three-dimensional structural diagram of a negative pressure straw.
[0039] Figure 11 for Figure 9 Top view. Detailed Implementation
[0040] The following detailed description illustrates the specific implementation method:
[0041] The reference numerals in the accompanying drawings include: frame 10, slide rail 1, blade holder 2, rotating seat 21, limiting groove 211, slide rod 22, mounting through groove 221, auxiliary platform 222, blade 23, roller 24, elastic element 25, limiting rod 26, support block 27, cam 3, receiving element 4, blade groove 41, sliding rod 5, slider 51, negative pressure suction tube 52, guide wheel 53, baffle one 54, baffle two 55, belt 6, guide roller 7.
[0042] Example
[0043] Combination Figures 1 to 11 A method for processing film edge material requires a slitting device. The slitting device includes a frame 10, on which a slide rail 1 is fixedly installed. Multiple knife holders 2 that can move on the slide rail 1 are installed on the slide rail 1. After each knife holder 2 moves into position, it is fixed on the slide rail 1 by locking screws. The length direction of the slide rail 1 is parallel to the width direction of the film.
[0044] Combination Figure 6 and Figure 7 The specific cooperation between the slide rail 1 and the tool holder 2 is as follows: The slide rail 1 includes an upper slide rail and a lower slide rail that are parallel to each other. The upper slide rail and the lower slide rail are arranged vertically. The outer periphery of both the upper slide rail and the lower slide rail includes a circumferential surface and a vertical surface. The tool holder 2 can be placed on the outer periphery of the slide rail 1 from top to bottom. The vertical surfaces of the upper slide rail and the lower slide rail are located on both sides of the central axis of the slide rail, and the two vertical surfaces are parallel. The tool holder 2 is threaded with a locking screw for locking the tool holder 2 onto the slide rail 1. The locking screw can abut against one of the vertical surfaces. Specifically, in this embodiment, the locking screw is used to fasten the vertical surface on the lower slide rail. The vertical surface of the lower slide rail faces outward to facilitate the tightening operation of the locking screw. The tool holder 2 is provided with an upper circumferential mating surface, a lower circumferential mating surface, and a vertical mating surface. The upper circumferential mating surface mates with the circumferential surface on the upper slide rail, the lower circumferential mating surface mates with the circumferential surface on the lower slide rail, and the vertical mating surface can be clearance-fitted with the vertical surface on the upper slide rail. When the tool holder 2 needs to slide, loosen the locking screw to release the contact between the locking screw and the vertical surface, then lift the tool holder 2 upwards to remove it from the slide rail 1. After placing the tool holder 2 in the appropriate position, tighten the locking screw again. The entire process of changing the position of the tool holder 2 does not require pushing the tool holder 2 to move on the slide rail 1, avoiding the problems of difficulty in moving the tool holder 2 and low moving efficiency caused by a large moving stroke. It also avoids the problem of increased wear on the outer circumference of the slide rail 1 due to the tool holder 2 moving repeatedly along the length of the slide rail 1.
[0045] A cam 3 is rotatably connected to the frame 10. The cam 3 is connected to the power guide roller 7 on the film production equipment via a belt 6.
[0046] Each blade holder 2 is rotatably connected to a rotating seat 21. The rotation axis of the rotating seat 21 is parallel to the slide rail 1. A slide rod 22 is slidably connected to the radial side of the rotating seat 21. One end of the slide rod 22 is detachably mounted with a blade 23. The sliding direction of the slide rod 22 is parallel to the blade length direction of the blade 23. A roller 24 is rotatably connected to the other end of the slide rod 22. An elastic element 25, which is a spring, is sleeved on the slide rod 22. The spring is located between the rotating seat 21 and the roller 24. The roller 24 can abut against the outer peripheral surface of the cam 3 under the action of the elastic element 25. The cam 3 rotates, pushing the slide rod 22 to move back and forth. In this embodiment, the rotating cam 3, the elastic element 25 sleeved on the slide rod 22, and the roller 24 mounted on the slide rod 22 form a cam mechanism. All blades 23 share a cam 3 when moving back and forth.
[0047] A counter is installed on the blade holder 2 to record the cumulative number of reciprocations of the slide bar 22. Since the blade 23 is fixed on the slide bar 22, the number of reciprocations recorded by the counter is also the number of reciprocations of the blade 23. Each time the blade 23 is replaced, the counter is reset to zero to ensure that the counter records the reciprocation count of the corresponding blade 23. The counter is used to monitor the remaining lifespan of the blade 23. This avoids the problem of poor film slitting quality caused by overuse of the blade 23, and also avoids the problem of low utilization rate caused by premature replacement of the blade 23.
[0048] A receiving component 4 parallel to the slide rail 1 is also fixedly installed on the frame 10. The receiving component 4 and the slide rod 22 are located on both sides of the film being cut. The receiving component 4 is machined with a number of cutting grooves 41, which are evenly spaced. The cutting grooves 41 are parallel to the slide rod 22. The blade 23 can be inserted into the cutting groove 41 during the reciprocating movement of the slide rod 22. The part of the blade 23 inserted into the cutting groove 41 is located inside the cutting groove 41. The cutting groove 41 forms a guide for the reciprocating movement of the blade 23 and also limits the movement position of the blade 23 to ensure the stability of the movement of the blade 23. In addition, the cutting groove 41 also protects the blade 23 and prevents workers from directly touching the reciprocating blade 23 to improve safety.
[0049] A limiting component is fixed on the tool holder 2. In this embodiment, the limiting component is a limiting rod 26. Two arc-shaped limiting grooves 211 are machined on the rotating seat 21. The central axis of the arc surface on the arc groove is coaxial with the central axis of the rotating seat 21. The limiting rod 26 can be located in the limiting groove 211. When the limiting rod 26 is located in the limiting groove 211, it can be used to limit the rotation of the rotating seat 21. In order to ensure that the limiting rod 26 completely limits the rotation of the rotating seat 21, elastic rubber can be wrapped around the outer periphery of the limiting rod 26. The width of the elastic layer formed by the elastic rubber is greater than the width of the limiting groove 211, so that the friction force is large when the limiting rod 26 cooperates with the limiting groove 211. The rotating seat 21 will not easily fall off the limiting rod 26 as the sliding rod 22 moves back and forth.
[0050] A support block 27 is also fixed on the blade holder 2. The support block 27 is located below the rotating seat 21. The support block 27 is used to support the end of the slide rod 22 near the blade 23. The support block 27 is used to support the vertically placed slide rod 22 after rotation. The vertically placed slide rod 22 keeps the blade 23 away from the film. When there is a spare blade holder 2 on the slide rail 1, the blade 23 installed on the spare blade holder 2 (called the spare blade 23) can be placed vertically on the slide rod 22 to ensure that the spare blade 23 does not need to be adjusted in installation position and will not cut the film.
[0051] A mounting groove 221 is formed at the center of the end of the slide rod 22. The length direction of the mounting groove 221 is parallel to the sliding direction of the slide rod 22. An auxiliary platform 222 is formed on the outer periphery of the slide rod 22. The two auxiliary platforms 222 are symmetrical about the mounting groove 221. Each auxiliary platform 222 includes a mounting surface and a positioning surface. The mounting surface is parallel to the sliding direction of the slide rod 22, and the positioning surface is used to contact the side of the blade 23. The positioning surface is perpendicular to the mounting surface.
[0052] The slide bar 22 is machined with a vertical through-slot 221 and a mounting hole on the mounting surface. Both the through-slot 221 and the auxiliary platform 222 can be used to place the blade 23. The blade 23 has a mating hole corresponding to the position of the mounting hole. For main material cutting, only one blade 23 is mounted on the slide bar 22. This blade 23 is mounted on the through-slot 221, and the bottom of the through-slot 221 positions the blade 23 laterally. The blade 23 is then fixedly mounted on the slide bar 22 using the mounting hole, mating hole, locking bolt, and nut. If it is necessary to cut a single side material into two or three sub-side materials, the blade 23 can also be placed on the auxiliary platform 222. The blade 23 is positioned laterally using the positioning surface, and the bolt, nut, and mounting surface on the slide bar 22 are used to fix the blade 23 on the auxiliary platform 222 and the through-slot 221 (e.g., ...). Figure 9 As shown in the figure, the installation method is simple and convenient. By installing the blade 23 for cutting edge material on the slide bar 22 corresponding to the edge material, the edge material with a larger size can be cut into two or three strips, thereby narrowing the width of each edge material and reducing the probability that the edge material cannot be sucked away in time because the edge material is wider than the inner diameter of the negative pressure suction tube 52.
[0053] Two sliding rods 5 are also fixed on the frame 10. Each sliding rod 5 is slidably connected to a slider 51. The sliding rod 5 is parallel to the slide rail 1 (that is, the moving direction of the slider 51 is the same as the sliding direction of the knife holder 2). When the slider 51 does not need to move, it can be fixed on the sliding rod 5 by means of detachable connection. The negative pressure suction tube 52 is fixedly installed on the slider 51. By changing the position of the slider 51 on the sliding rod 5, the position of the negative pressure suction tube 52 can be changed, thereby facilitating the recycling of edge materials of films of different widths.
[0054] A baffle 54 is fixed to the slider 51, and a guide wheel 53 is rotatably connected to the baffle 54. The guide wheel 53 is located directly above the negative pressure suction tube 52, and a baffle 55 is installed on the guide wheel 53. The space between the baffle 54 and the baffle 55 is used for the passage of edge material. The guide wheel 53 can rotate freely. By setting the guide wheel 53, the edge material is prevented from scraping the opening of the negative pressure suction tube 52 before entering the tube. At the same time, by setting the baffle 54 and the baffle 55, the edge material is allowed to enter the negative pressure suction tube 52 within a limited area. This avoids the problem of high friction between the edge material and the inner wall of the negative pressure suction tube 52, which would affect the speed of edge material suction due to the edge material being offset relative to the center of the tube 52.
[0055] The film edge processing method of this embodiment includes the following steps:
[0056] S1. Before the blade 23 cuts the film, for the blade 23 that needs to be used on the blade holder 2, the corresponding rotating seat 21 is rotated until the limiting rod 26 is located in the limiting groove 211, at which point the blade 23 is in use; while for the spare blade 23 that does not need to be used, the limiting rod 26 of the corresponding blade holder 2 is removed from the rotating seat 21, and the rotating seat 21 is rotated until the slide rod 22 is placed vertically on the support block 27. After the slide rod 22 is placed vertically, the spare blade 23 is away from the film and is in a standby state. Figure 2 and Figure 4 In each case, one blade 23 on the tool holder 2 is in a standby state.
[0057] S2. During the film slitting process, the film is continuously wound up by the take-up roller. Simultaneously, the slitting blade 23, driven by the rotating cam 3, reciprocates along the blade length direction along the slide bar 22. With this reciprocating movement, the blade 23 slits the film, and the area along the blade length that has contacted the film wears evenly as the slitting time increases. During film slitting, a counter accumulates the number of reciprocating strokes of the blade 23, thus monitoring the remaining lifespan of the blade 23.
[0058] When using this method, the counter can also be connected to the control system. The control system can simultaneously monitor the cumulative count of all counters. When the cumulative count on one of the counters reaches the preset number, the controller will control the counter to sound an alarm to remind the worker to replace the blade 23, thereby improving the level of automation.
[0059] S3. During the slitting process, the edge material is continuously fed to the crusher through the negative pressure suction pipe 52. When the width of the edge material is greater than the inner diameter of the negative pressure suction pipe 52, two or three blades 23 can be installed on the slide bar 22 used to separate the edge material and the main material. One blade 23 is installed on the mounting slot 221, and the remaining blades 23 are installed on the auxiliary platform 222 respectively. This enables the reciprocating movement of the same slide bar 22, which drives all the blades 23 on the slide bar 22 to reciprocate and achieve the slitting of the edge material on one side into strips. The widest dimension of the sub-edge material cut into strips is not greater than the inner diameter of the negative pressure suction pipe 52, so as to reduce the probability that the edge material cannot be sucked away in time due to the edge material being wider than the inner diameter of the negative pressure suction pipe 52.
[0060] S4. Before the edge material enters the negative pressure suction tube 52, multiple sub-edge materials cut into strips can be stacked on the guide wheel 53 and enter the middle of the negative pressure suction tube 52 through the space between the two baffles, so as to be sucked away by the negative pressure suction tube 52.
[0061] This embodiment cuts the edge material into smaller pieces so that when the cumulative width of the edge material is large, it can be fed into the negative pressure suction tube 52 in the form of multiple smaller pieces, reducing the probability that the edge material cannot be sucked away in time.
[0062] Furthermore, in this embodiment, the cam 3 can simultaneously contact the rollers 24 on all the slide bars 22 in use, thereby enabling all the blades 23 to reciprocate synchronously. The rotational power of the cam 3 comes from the power originally used to drive the guide rollers on the film production equipment, so no additional power source is added, ensuring that the cost of the slitting device is low.
[0063] For a single blade 23, the reciprocating movement of the blade 23 makes the wear of the cutting edge in the length direction of the blade basically uniform. The use of the blade 23 only requires the blade 23 to be fixed once. When it is disassembled again, that is, the blades in the length direction have all reached the same wear level. At this time, the disassembly is to replace the new blade 23. Therefore, compared with the prior art, this embodiment does not need to adjust the extension length of the blade 23 relative to the blade holder 2 according to the wear of the blade and the contact position of the thin film during the film slitting process, which greatly reduces the time for workers to adjust the blade 23.
[0064] In addition, when switching between the use state and the standby state of the blade 23, you only need to rotate the rotating base 21, which is simple and convenient to operate.
[0065] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A method for processing film edge material, wherein the edge material is fed to a pulverizer via a negative pressure suction pipe, characterized in that: When the width of the edge material is greater than the inner diameter of the negative pressure suction tube, a blade is added to cut the edge material so that the widest dimension of the cut edge material is not greater than the inner diameter of the negative pressure suction tube; a guide wheel that can rotate freely is set above the negative pressure suction tube, and two baffles are installed in the length direction of the guide wheel, and the space between the two baffles is used for the edge material to pass through; When the blade is cutting the film, the blade is installed on the corresponding blade holder. The film is continuously wound up by the take-up roller. At the same time, the blade for cutting the film moves back and forth relative to the blade holder. The direction of movement of the blade is the length direction of the blade edge. The slide bar has a detachable blade mounted on one end. The sliding direction of the slide bar is parallel to the length direction of the blade. The other end of the slide bar is rotatably connected to a roller. The reciprocating movement of the slide bar is driven by a cam mechanism. A rotating seat is rotatably connected to the blade holder, and a sliding rod is slidably connected to the rotating seat. A limiting component is fixed on the blade holder to restrict the rotation of the rotating seat. A support block is also fixed on the blade holder. When the blade is not used to cut the film, the limiting component restricts the rotation of the rotating seat, so that the rotating seat rotates until the sliding rod on the rotating seat is placed vertically on the support block. The cam mechanism includes a rotatable cam, a spring fitted on a slide bar, and the spring located between the rotary seat and the roller. The roller can abut against the outer peripheral surface of the cam under the action of the spring. The cam can simultaneously contact the rollers on all slide bars in use, thereby causing the blades in all working positions to reciprocate synchronously.
2. The method for processing film edge material according to claim 1, characterized in that: The negative pressure suction tube and guide wheel are mounted on the slider, which can move along the width of the film.
3. The method for processing film edge material according to claim 1, characterized in that: During the reciprocating movement of the blade, a counter records the cumulative number of reciprocating movements of the blade.
4. The method for processing film edge material according to claim 1, characterized in that: The cam is connected to the guide roller on the film winding equipment.
5. The method for processing film edge material according to claim 1, characterized in that: The edge material on the same side can be cut simultaneously by up to three spaced blades, with the three blades fixed on the same slide bar.
6. The method for processing film edge material according to claim 5, characterized in that: The three blades mounted on the same slide bar are installed in the middle and on both sides of the slide bar, and the three blades are fixed in place by the same bolt and nut.