Film slitting mechanism and slitter

Abstract

The film slitting mechanism and the slitting machine belong to the technical field of slitting machines, and specifically relate to a film slitting mechanism. The film slitting mechanism comprises a bottom cutter shaft. The film is attached to the surface of the bottom cutter shaft and is conveyed forward. A slitting assembly is arranged above the bottom cutter shaft. The slitting assembly is internally provided with a plurality of slitting knives for slitting the film. A distance adjusting assembly is arranged in front of the slitting assembly for adjusting the distance between the plurality of slitting knives. In the present application, the locking and unlocking of the sliding seat are completed in a pure mechanical manner, avoiding the use of complex air circuits and pneumatic control elements and reducing the failure rate. Meanwhile, the first elastic pad provides elastic support for the first graphite column, so that the end of the first graphite column is always attached to the sliding contact surface, realizing follow-up uninterrupted lubrication, effectively reducing the friction loss between the first sliding rail, the knife holder and the first sliding seat, delaying the wear of the key matching surfaces, prolonging the service life of the mechanism, ensuring the long-term smooth sliding of the first sliding seat, and maintaining the positioning accuracy and slitting stability of the slitting knives.

Description

Technical Field

[0001] This invention belongs to the field of slitting machine technology, specifically to film slitting mechanism and slitting machine. Background Technology

[0002] A film slitting machine is a specialized piece of equipment used to cut wide films longitudinally into multiple narrow strips. During the film production process, the film can be slitted to a fixed width according to actual process requirements.

[0003] Existing technologies disclose several invention patents in the field of slitting machines. Among them, patent CN107324115B discloses a film slitting device, including a frame, a slitting roller assembly, a first slitting device, a second slitting device, a first driving mechanism, a second driving mechanism, a first slitting blade mechanism, and a second slitting blade mechanism. The slitting roller assembly is respectively equipped with the first slitting device and the second slitting device. The first driving mechanism drives the first slitting device to move vertically, and the second driving mechanism drives the second slitting device to move vertically. The first slitting device has a plurality of first slitting blade mechanisms evenly distributed, and the second slitting device has a plurality of second slitting blade mechanisms evenly distributed. The first and second slitting blade mechanisms are staggered. The slitting mechanism is also equipped with a cutter, and auxiliary pressure rollers are installed on both sides of the cutter. The film is slitted in stages by two slitting devices to reduce the vibration caused by dense one-time slitting of the film and ensure that the cut edges are even. In existing film slitting mechanisms and slitting machines, the transmission cutter relies on air pressure to lock after adjustment. Due to the large number of cutters, this air pressure locking method leads to a complex air circuit, resulting in a high failure rate. At the same time, there may be slight differences in thickness, hardness, or additive distribution in the transverse direction of the film. When slitting to a harder or thicker area, the corresponding blade will wear faster. This uneven wear will cause the dull blade to put additional load on adjacent blades or traction rollers. Conversely, if the wear of each blade is uniform, the load on the entire cutter roller will be uniform, which helps to extend the service life of the main shaft bearing and drive system.

[0004] Based on this, the present invention designs a film slitting mechanism and a slitting machine to solve the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a film slitting mechanism and slitting machine. This invention primarily addresses the problem in existing film slitting mechanisms and machines where the transmission blades rely on pneumatic pressure for adjustment and locking. Due to the large number of blades, this pneumatic locking method leads to complex air paths, resulting in a high failure rate. Furthermore, films may exhibit slight differences in thickness, hardness, or additive distribution in the transverse direction. When slitting into harder or thicker areas, the corresponding blades wear faster. This uneven wear causes dull blades to exert additional loads on adjacent blades or the traction roller. Conversely, if all blades wear evenly, the entire blade roller experiences a uniform load, helping to extend the service life of the main shaft bearings and drive system.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a film slitting mechanism, including a bottom blade shaft; the film is attached to the surface of the bottom blade shaft and conveyed forward; a slitting assembly is arranged above the bottom blade shaft; the slitting assembly has multiple slitting blades built in it for slitting the film; and an adjustment assembly is arranged in front of the slitting assembly for adjusting the spacing between the multiple slitting blades respectively.

[0007] Preferably, the slitting assembly includes a blade holder disposed above the bottom blade shaft. A first slide rail is mounted on the front side of the blade holder, and a plurality of first slide blocks are slidably disposed on the first slide rail. A blade holder is fixedly connected to the bottom of each first slide block. An angle adjustment seat is provided on the side of the blade holder. The angle adjustment seat and the blade holder are connected by bolts to adjust the tightness between the two. A sliding groove is opened on the end face of the angle adjustment seat, and a slider is slidably connected in the sliding groove. A side seat is fixedly connected to the side of the slider away from the angle adjustment seat, and the slitting blade is detachably mounted on the side seat.

[0008] Preferably, the first slide has a through hole, a support seat is engaged in the through hole, a drive shaft is slidably inserted through the axis of the support seat, a pressure plate is connected to the front end of the drive shaft, and a first spring is sleeved on the drive shaft. The first spring is supported between the opposite surfaces of the pressure plate and the support seat. A first toothed groove is formed at the other end of the drive shaft, and a first toothed plate is connected to the inner wall of the first toothed groove.

[0009] Preferably, a plurality of driven shafts are slidably arranged on the support base at a position corresponding to the side of the first toothed plate. The plurality of driven shafts are arranged in a circular array. A second toothed groove is opened at the rear end of each driven shaft. A second toothed plate is connected to the inner wall of the second toothed groove. The second toothed plate and the first toothed plate are meshed with the same first gear. A converter shaft is snapped at the axis of the first gear. The end of the converter shaft is rotatably connected to the inner wall of the through hole. The rear ends of the plurality of driven shafts are connected to an anti-slip plate. The rear of the anti-slip plate abuts against the tool holder.

[0010] Preferably, the distance adjustment assembly includes a traveling frame disposed in front of the tool holder. The front and rear sides of the bottom of the traveling frame are connected to second slide rails. A second slide block is slidably connected to each of the two second slide rails. The bottom of the two second slide blocks is connected to a slide table. A reduction motor is installed at the bottom of the slide table. A second gear is installed on the output shaft of the reduction motor. A third toothed plate that meshes with the second gear is connected to the inner side wall of the traveling frame.

[0011] Preferably, the bottom of the slide table is connected to two third slide rails, and a third slide block is slidably connected to the two third slide rails. The bottom of the third slide block is connected to a drive shaft, and a second adapter is rotatably connected to the drive shaft. The bottom of the second adapter is rotatably connected to a first adapter, and a cylinder is installed at the other end of the first adapter. The telescopic end of the cylinder is connected to a second adapter, and a second adapter is rotatably connected to the second adapter. The top of the second adapter is connected to the bottom of the slide table. The other end of the drive shaft is slidably connected to a buckle plate, and the back of the buckle plate is connected to two housings. Two mating grooves are opened on the tool holder corresponding to the positions of the two housings. A second spring is sleeved on the drive shaft, and the drive shaft and the buckle plate are elastically supported by the second spring.

[0012] The slitting machine includes a bottom blade shaft, a slitting assembly, and a spacing adjustment assembly. The bottom blade shaft, the slitting assembly, and the spacing adjustment assembly are all located inside the main frame. The main frame is used for unwinding the film and rewinding it after slitting. A first lubrication cavity is provided on multiple contact surfaces of the first slide block and the first slide rail. A first graphite column is embedded in each first lubrication cavity. One end of the first graphite column abuts against the first slide rail, and the other end of the first graphite column is connected to a first elastic pad. The first elastic pad is connected to the inner bottom surface of the first lubrication cavity.

[0013] Preferably, an electric cylinder is fixedly installed on the angle adjustment seat, and a linkage shaft is fixedly connected to the telescopic end of the electric cylinder. The other end of the linkage shaft is fixedly connected to the side seat. A bending shaft is connected to the back of the blade holder corresponding to the position of the slitting blade. A pressure roller is provided below the bending shaft, and a pressure sensor is installed between the pressure roller and the bending shaft.

[0014] Preferably, each of the angle adjustment seats is connected to an eccentric shaft, and a linkage frame is provided on the side of each angle adjustment seat corresponding to its respective eccentric shaft. The linkage frame has a linkage port, and the multiple eccentric shafts are slidably connected to the multiple linkage ports respectively. Each of the multiple linkage frames is connected to a fourth slide block at its top. The inner sides of the multiple fourth slide blocks are slidably connected to the same fourth slide rail. The top of the fourth slide rail is connected to multiple slide rods. The top of each slide rod is fitted with a rod sleeve. The top of each rod sleeve is connected to the inner wall of the main frame.

[0015] Preferably, an adapter sleeve is fitted on the eccentric shaft, and the eccentric shaft is rotatably connected to the inner wall of the corresponding linkage port through the adapter sleeve. A plurality of second lubrication cavities are opened on the inner wall of the adapter sleeve, and a second graphite column is embedded in each second lubrication cavity. One end of the second graphite column abuts against the axial surface of the eccentric shaft, and the other end of the second graphite column is connected to a second elastic pad, which is connected to the inner bottom surface of the second lubrication cavity.

[0016] The beneficial effects of this invention are as follows: 1. In this invention, independent and precise adjustment of the spacing between each slitting blade is achieved through mechanical transmission and locking, avoiding inconsistencies caused by air pressure fluctuations or pipeline differences during air circuit adjustment. An elastic clamping locking method between the anti-slip plate and the blade holder, combined with the restoring force of the first spring, ensures that the first slide block does not shift during operation, improving slitting stability. Locking and unlocking of the slide block is completed mechanically, avoiding the use of complex air circuits and pneumatic control components, reducing the failure rate. Simultaneously, the first elastic pad provides elastic support to the first graphite column, ensuring its end always adheres to the sliding contact surface, achieving continuous lubrication. This effectively reduces frictional loss between the first slide rail, blade holder, and first slide block, delaying wear on key mating surfaces, extending the service life of the mechanism, ensuring long-term stable sliding of the first slide block, and maintaining the positioning accuracy and slitting stability of the slitting blade.

[0017] 2. In this invention, pressure sensors monitor the force changes of each pressure roller in real time, and combined with closed-loop control of the electric cylinder, the contact pressure between the slitting blade and the film is adaptively adjusted, improving the intelligence level of the equipment. This avoids premature wear of individual slitting blades due to differences in local film thickness, hardness, or additive distribution, ensuring that the wear degree of all slitting blades is more consistent, extending the overall service life of the blades, reducing replacement frequency and maintenance costs. Blades with consistent wear exert similar resistance and compression deformation on the film, effectively suppressing local tension fluctuations caused by blade dulling, ensuring tension stability during the slitting process, significantly reducing defects such as wavy edges, warping, and uneven winding caused by uneven tension, improving the film slitting yield and edge neatness, and broadening the equipment's adaptability to processing different film materials.

[0018] 3. In this invention, the sliding fit between the eccentric shaft and the linkage port, and the vertical guiding and limiting of the linkage frame via the slide rod and sleeve, ensure that multiple slitting blades remain synchronized and consistent when adjusting their tilt angles. This avoids individual blade angle deviations, and the contact pressure between each slitting blade and the film tends to be consistent. This is beneficial for the film to be subjected to uniform force in the width direction, improving the stability of the slitting process and the quality of the finished product. The consistency of the tilt angle makes the wear rate of each slitting blade similar, avoiding premature wear of individual blades due to angle deviations and extending the overall blade life. Only by loosening the bolts and adjusting one slitting blade in sequence, the remaining slitting blades will automatically follow the adjustment through linkage, reducing repeated calibration operations and improving adjustment efficiency and convenience. The limiting structure restricts movement in non-vertical directions, avoiding offset or shaking during adjustment, ensuring precise control of the angle relationship, and obtaining a neater slitting edge.

[0019] 4. In this invention, the sliding friction between the eccentric shaft and the linkage port is transformed into rotational friction by the adapter sleeve, which greatly reduces frictional resistance and surface wear, and extends the service life of the eccentric shaft and the linkage port. Under the elastic support of the second elastic pad, the end of the second graphite column is always attached to the eccentric shaft surface, realizing continuous lubrication and avoiding dry friction caused by lubrication interruption. The optimized friction form of the adapter sleeve and the solid lubrication of the graphite column complement each other, forming a dual protection of mechanical structure and lubricating material, further improving the reliability and durability of the eccentric shaft operation. As a solid lubricant, the graphite column does not require the addition of additional lubricating oil or grease, simplifying maintenance work, while avoiding lubricant contamination of the film slitting environment, effectively controlling eccentric shaft wear, and maintaining the fitting accuracy between the eccentric shaft and the linkage port for a long time, ensuring the accuracy and stability of the slitting blade angle adjustment. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the present invention; Figure 3 In this invention Figure 2 A schematic diagram of the disassembled structure; Figure 4 This is the present invention. Figure 3 A structural diagram from another perspective; Figure 5 This is the present invention. Figure 4 A three-dimensional structural diagram of the mid-splitting component viewed from below; Figure 6 This is a schematic diagram of the structure of the first slide block in this invention; Figure 7 In this invention Figure 6 A structural diagram from another perspective; Figure 8 In this invention Figure 6 A cross-sectional structural diagram; Figure 9 This is the present invention. Figure 6 A cross-sectional view of the central groove. Figure 10 This is the present invention. Figure 8 Enlarged structural diagram at point A; Figure 11 This is the present invention. Figure 5 Schematic diagram of the structure of the center-width adjustment component; Figure 12 This is the present invention. Figure 11 Schematic diagram of the middle sliding stage; Figure 13 This is the present invention. Figure 5 Enlarged structural diagram at point B; Figure 14 This is a schematic diagram of the structure of the adapter sleeve and eccentric shaft separated in this invention; Figure 15 In this invention Figure 6 A schematic diagram of the three-dimensional structure viewed from an upward angle.

[0022] In the diagram: 1. Bottom blade shaft; 2. Slitting assembly; 201. Blade holder; 202. First slide rail; 203. First slide block; 204. Blade holder; 205. Angle adjustment seat; 206. Bolt; 207. Slitting blade; 208. Through hole; 209. Support seat; 210. Drive shaft; 211. Pressure plate; 212. First spring; 213. First tooth groove; 214. First tooth plate; 215. Driven shaft; 216. Second tooth groove; 217. Second tooth plate; 218. Adapter shaft; 219. First gear; 220. Anti-slip plate; 221. Connecting groove; 3. Adjustment assembly; 301. Walking frame; 302. Second slide rail; 303. Second slide block; 304. First adapter; 305. Slide table; 306. Third tooth plate; 307. Reduction gear. 308. Motor; 309. First adapter frame; 310. Third slide rail; 311. Third slide block; 312. Drive shaft; 313. Second spring; 314. Buckle plate; 315. Sleeve; 316. Second adapter; 317. Cylinder; 318. Second adapter frame; 4. First lubrication chamber; 5. First elastic pad; 6. First graphite column; 7. Main frame; 8. Side seat; 9. Slide groove; 10. Slider; 11. Electric cylinder; 12. Bent shaft; 13. Pressure sensor; 14. Pressure roller; 15. Fourth slide block; 16. Fourth slide rail; 17. Fixed seat; 18. Slide rod; 19. Rod sleeve; 20. Linkage frame; 21. Eccentric shaft; 22. Adapter sleeve; 23. Second lubrication chamber; 24. Second graphite column; 25. Second elastic pad; 26. Linkage port. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 15 As shown, the film slitting mechanism includes a bottom blade shaft 1; the film is attached to the surface of the bottom blade shaft 1 and conveyed forward; a slitting assembly 2 is provided above the bottom blade shaft 1; the slitting assembly 2 has multiple slitting blades 207 built in it for slitting the film; and an adjustment assembly 3 is provided in front of the slitting assembly 2 for adjusting the spacing between the multiple slitting blades 207 respectively. The slitting assembly 2 includes a blade holder 201 disposed above the bottom blade shaft 1. A first slide rail 202 is mounted on the front side of the blade holder 201. Multiple first slide blocks 203 are slidably disposed on the first slide rail 202. A blade holder 204 is fixedly connected to the bottom of each first slide block 203. An angle adjustment seat 205 is provided on the side of the blade holder 204. The angle adjustment seat 205 and the blade holder 204 are connected by bolts 206 to adjust the tightness between them. A groove 9 is opened on the end face of the angle adjustment seat 205. A slider 10 is slidably connected in the groove 9. A side seat 8 is fixedly connected to the side of the slider 10 facing away from the angle adjustment seat 205. The slitting blade 207 is detachably mounted on the side seat 8. The first slide block 203 has a through hole 208, and a support base 209 is engaged in the through hole 208. The drive shaft 210 is slidably passed through the axis of the support base 209. The front end of the drive shaft 210 is connected to a pressure plate 211, and a first spring 212 is sleeved on the drive shaft 210. The first spring 212 is supported between the opposing surfaces of the pressure plate 211 and the support base 209. The other end of the drive shaft 210 has a first toothed groove 213, and a first toothed plate 214 is connected to the inner wall of the first toothed groove 213. On the support base 209, corresponding to the side position of the first toothed plate 214, multiple driven shafts 215 are slidably arranged. The multiple driven shafts 215 are arranged in a ring array. Each driven shaft 215 has a second toothed groove 216 at its rear end. A second toothed plate 217 is connected to the inner wall of the second toothed groove 216. The second toothed plate 217 and the first toothed plate 214 are meshed with the same first gear 219. A converter shaft 218 is snapped at the axis of the first gear 219. The end of the converter shaft 218 is rotatably connected to the inner wall of the through hole 208. The rear ends of the multiple driven shafts 215 are connected to an anti-slip plate 220. The rear of the anti-slip plate 220 abuts against the tool holder 201. The distance adjustment assembly 3 includes a traveling frame 301 located in front of the tool holder 201. The front and rear sides of the bottom of the traveling frame 301 are connected to second slide rails 302. Each of the two second slide rails 302 is slidably connected to a second slide block 303. The bottom of the two second slide blocks 303 is connected to a slide table 305. A reduction motor 307 is installed at the bottom of the slide table 305. A second gear is installed on the output shaft of the reduction motor 307. A third toothed plate 306 that meshes with the second gear is connected to the inner side wall of the traveling frame 301. The bottom of the slide table 305 is connected to two third slide rails 309. A third slide block 310 is slidably connected to the two third slide rails 309. The bottom of the third slide block 310 is connected to a drive shaft 311. A second adapter 317 is rotatably connected to the drive shaft 311. A first adapter 304 is rotatably connected to the bottom of the second adapter 317. A cylinder 316 is installed at the other end of the first adapter 304. A second adapter 315 is connected to the telescopic end of the cylinder 316. A second adapter 317 is rotatably connected to the second adapter 315. The top of the second adapter 317 is connected to the bottom of the slide table 305. The other end of the drive shaft 311 is slidably connected to a buckle plate 313. Two housings 314 are connected to the back of the buckle plate 313. Two mating grooves 221 are opened on the tool holder 201 corresponding to the positions of the two housings 314. A second spring 312 is sleeved on the drive shaft 311. The drive shaft 311 and the buckle plate 313 are elastically supported by the second spring 312.

[0025] This embodiment is specifically as follows: The film roll to be slit is assembled on the main frame 7. The main frame 7 performs unwinding and rewinding of the film roll after slitting. Before slitting the film roll, the spacing between the multiple slitting blades 207 needs to be adjusted according to processing requirements. The system first controls the reduction motor 307 to run. The output shaft of the reduction motor 307 drives the second gear to rotate on the tooth surface of the third tooth plate 306, thereby driving the slide table 305 to slide on the second slide rail 302 through the second slide block 303. After the slide table 305 slides to the front of the leftmost or rightmost slitting blade 207, the system controls the reduction motor 307 to stop and controls the cylinder 316 to retract. One end of the cylinder 316 passes through the second adapter 315 around the second adapter frame 31. 7 rotates, and its other end rotates around the first adapter 308 through the first adapter 304, transmitting the pulling force to the drive shaft 311 through the first adapter 304 and the first adapter 308. This, in turn, pushes the buckle plate 313 towards the first slide block 203 through the drive shaft 311. After the two sleeves 314 enter the two mating slots 221 respectively, the system control cylinder 316 continues to retract, compressing the second spring 312 to cause elastic deformation. The extension end of the cylinder 316 pushes the drive shaft 210 into the through hole 208. During the pushing process, the drive shaft 210 drives the first gear 219 to rotate through the first toothed plate 214. Utilizing the meshing relationship between the first gear 219 and the second toothed plate 217, and the first toothed plate 218... The first gear 219 and the second gear plate 217 are symmetrically arranged around the first gear 219, thus pushing the driven shaft 215 in the opposite direction. Driven by multiple driven shafts 215, the anti-slip plate 220 disengages from the tool holder 201. After the two sleeves 314 enter the docking grooves 221 respectively, the combination between the buckle plate 313 and the first slide 203 is completed. The system controls the reduction motor 307 to work again until the first slide 203 moves to the required position. Then, the system controls the cylinder 316 to perform an extension movement. After the transmission shaft 311 disengages from the drive shaft 210, the first spring 212 between the pressure plate 211 and the support seat 209 begins to perform an elastic reset movement, driving multiple driven shafts 215 to push the anti-slip plate 220 simultaneously, so that the anti-slip plate 220 is tightly attached to the tool holder. On 201, to ensure the positioning stability of the first slide 203, the above operation is repeated to sequentially complete the slitting position adjustment of multiple slitting blades 207. The independent locking of multiple first slides 203 is achieved through a mechanical mechanism, replacing traditional pneumatic adjustment. Through mechanical transmission and locking, independent and precise adjustment of the spacing between each slitting blade 207 is achieved, avoiding inconsistencies caused by air pressure fluctuations or pipeline differences in traditional pneumatic adjustment. An elastic clamping locking method is used between the anti-slip plate 220 and the blade holder 201, combined with the restoring force of the first spring 212, to ensure that the first slide 203 does not shift during operation, improving slitting stability and finished product quality. This is achieved through the coordinated operation of mechanical mechanisms such as the cylinder 316, gear tooth plate linkage, and spring return.It achieves a complete motion process of approaching, inserting, unlocking, moving, locking, and disengaging, using purely mechanical methods to lock and unlock the slide, avoiding the use of complex pneumatic circuits and pneumatic control components.

[0026] The slitting machine includes a bottom blade shaft 1, a slitting assembly 2, and a spacing adjustment assembly 3. The bottom blade shaft 1, the slitting assembly 2, and the spacing adjustment assembly 3 are all located inside the main frame 7. The main frame 7 is used for unwinding the film and rewinding it after slitting. First lubrication cavities 4 are provided on multiple contact surfaces of the first slide block 203 and the first slide rail 202. Each first lubrication cavity 4 is embedded with a first graphite column 6. One end of the first graphite column 6 abuts against the first slide rail 202, and the other end of the first graphite column 6 is connected to a first elastic pad 5. The first elastic pad 5 is connected to the inner bottom surface of the first lubrication cavity 4.

[0027] Specifically, in this embodiment, during the sliding of the first slide block 203 on the first slide rail 202, the ends of the multiple first graphite pillars 6, under the elastic support of the multiple first elastic pads 5, remain attached to the first slide rail 202 and the blade holder 201. This provides continuous lubrication to the contact surfaces between the first slide rail 202, the blade holder 201, and the first slide block 203, effectively reducing sliding wear among them. This ensures the operational stability of the first slide rail 202 and prevents excessive wear due to repeated adjustments, which could affect the slitting blade 20. The working stability of 7 is achieved by providing elastic support to the first graphite column 6 through the first elastic pad 5, so that the end of the graphite column is always attached to the sliding contact surface, realizing a follow-up and uninterrupted lubrication effect, avoiding lubrication interruption, effectively reducing frictional loss between the first slide rail 202, the tool holder 201 and the first slide block 203, delaying the wear process of key mating surfaces, thereby extending the service life of the mechanism. Sufficient lubrication can avoid the increase of gap or movement jamming caused by wear, ensuring that the first slide block 203 maintains stable sliding for a long time, thereby maintaining the positioning accuracy and cutting stability of the slitting blade 207.

[0028] Specifically, an electric cylinder 11 is fixedly installed on the angle adjustment seat 205. The telescopic end of the electric cylinder 11 is fixedly connected to a linkage shaft 27. The other end of the linkage shaft 27 is fixedly connected to the side seat 8. A bending shaft 12 is connected to the back of the blade holder 201 at the position corresponding to the slitting blade 207. A pressure roller 14 is provided below the bending shaft 12. A pressure sensor 13 is installed between the pressure roller 14 and the bending shaft 12.

[0029] In this embodiment, during the unwinding, slitting, and rewinding of the film roll by the main frame 7, multiple pressure rollers 14 roll on the film in the transmission state. Due to slight differences in thickness, hardness, or additive distribution in the transverse direction of the film, the reaction force from the film on the multiple pressure rollers 14 changes. This process is monitored in real time by pressure sensor 13. The system analyzes, processes, and judges the monitoring data. When the monitoring data value exceeds the set threshold, the system controls the corresponding electric cylinder 11 to retract. The extension end of the electric cylinder 11 applies a pulling force to the side seat 8 through the linkage shaft 27. The side seat 8 slides in the slide groove 9 through the slider 10, thereby reducing the contact pressure between the slitting blade 207 and the film at that location. This avoids excessive wear of individual slitting blades 207, ensuring that the wear degree of each slitting blade 207 is consistent. Slitting blades 207 with consistent wear generate resistance and compression deformation similar to the film, thereby avoiding problems caused by individual slitting blades 207 being too dull. This system effectively reduces local tension fluctuations and minimizes issues such as wavy edges, warping, or uneven winding of the film after slitting. Pressure sensor 13 monitors the force changes of each pressure roller 14 in real time, and combined with closed-loop control of electric cylinder 11, it achieves adaptive adjustment of the contact pressure between the slitting blade 207 and the film. This enhances the equipment's intelligence level, prevents premature wear of individual slitting blades 207 due to local film differences, and ensures that all slitting blades 207 have a uniform wear level, extending the overall service life of the blades and reducing replacement frequency and maintenance costs. Slitting blades 207 with uniform wear exert similar resistance and compression deformation on the film, effectively suppressing local tension fluctuations caused by blade dulling, ensuring tension stability during slitting, and significantly reducing defects such as wavy edges, warping, and uneven winding caused by uneven tension. This improves the film slitting yield and edge neatness. For films with uneven thickness, hardness, or additive distribution, the system has excellent adaptability, broadening the equipment's adaptability to different film materials.

[0030] Specifically, each eccentricity adjustment seat 205 is connected to an eccentric shaft 21, and each eccentricity adjustment seat 205 is provided with a linkage frame 20 on its side corresponding to its respective eccentric shaft 21. The linkage frame 20 is provided with a linkage port 26, and the multiple eccentric shafts 21 are slidably connected to the multiple linkage ports 26 respectively. The top of each of the multiple linkage frames 20 is connected to a fourth slide block 15. The inner sides of the multiple fourth slide blocks 15 are slidably connected to the same fourth slide rail 16. The top of the fourth slide rail 16 is connected to multiple slide rods 18. The top of each slide rod 18 is fitted with a rod sleeve 19. The top of each rod sleeve 19 is connected to the inner wall of the main frame 7.

[0031] This embodiment specifically involves: loosening multiple bolts 206 sequentially; adjusting the tilt angle of each slitting blade 207 according to the slitting requirements of the film roll to be slitted, i.e., controlling the contact pressure between the slitting blade 207 and the film; during the adjustment of one of the slitting blades 207 rotating around the bolt 206, the tilt angle adjustment seat 205 slides within the corresponding linkage port 26 via the eccentric shaft 21, thereby generating an upward thrust or downward pressure on the inner wall of the linkage port 26; under the action of this thrust, the linkage frame 20 drives multiple sliding rods 18 to slide within multiple rod sleeves 19 via the fixed seat 17, thereby limiting the movement of the multiple linkage frames 20, ensuring that the multiple linkage frames 20 only perform corresponding vertical lifting movements, thus ensuring the consistency of the tilt angle adjustment of the multiple slitting blades 207, making the wear degree of each slitting blade 207 tend to be balanced; through the sliding cooperation between the eccentric shaft 21 and the linkage port 26, and the linkage... The vertical guide limit achieved by the frame 20 via the slide bar 18 and the sleeve 19 ensures that the multiple slitting blades 207 maintain synchronization and consistency when adjusting their tilt angles, avoiding individual blade angle deviations. The contact pressure between each slitting blade 207 and the film tends to be consistent, which is beneficial for the film to be subjected to uniform force in the width direction, improving the stability of the slitting process and the quality of the finished product. The consistency of the tilt angle makes the wear rate of each slitting blade 207 similar, avoiding premature wear of individual blades due to angle deviations, extending the overall blade life, and reducing the replacement frequency. Only by loosening the bolts 206 and adjusting one slitting blade 207 in sequence, the remaining slitting blades 207 will automatically follow the adjustment through linkage, reducing repeated calibration operations, improving adjustment efficiency and convenience, limiting non-vertical movement, avoiding offset or shaking during adjustment, ensuring precise control of the angle relationship between the slitting blade 207 and the film, and facilitating the acquisition of neater slitting edges.

[0032] Specifically, an adapter sleeve 22 is fitted on the eccentric shaft 21. The eccentric shaft 21 is rotatably connected to the inner wall of the corresponding linkage port 26 through the adapter sleeve 22. Multiple second lubrication cavities 23 are opened on the inner wall of the adapter sleeve 22. A second graphite column 24 is embedded in each second lubrication cavity 23. One end of the second graphite column 24 abuts against the axial surface of the eccentric shaft 21, and the other end of the second graphite column 24 is connected to a second elastic pad 25. The second elastic pad 25 is connected to the inner bottom surface of the second lubrication cavity 23.

[0033] Specifically, this embodiment involves the following: During the movement of the eccentric shaft 21 within the corresponding linkage port 26, the sliding friction is converted into rotational friction via the adapter sleeve 22, effectively reducing wear between the eccentric shaft 21 and the linkage port 26. Simultaneously, under the action of multiple second elastic pads 25, the ends of multiple second graphite pillars 24 remain in contact with the axial surface of the eccentric shaft 21, further delaying the wear process of the eccentric shaft 21 and providing good lubrication and protection. By converting the sliding friction between the eccentric shaft 21 and the linkage port 26 into rotational friction via the adapter sleeve 22, frictional resistance and surface wear are significantly reduced, extending the service life of the eccentric shaft 21 and the linkage port 26. Under the elastic support of the second elastic pad 25, the end of the second graphite column 24 is always attached to the axial surface of the eccentric shaft 21, realizing continuous lubrication and avoiding dry friction caused by lubrication interruption. The optimized friction form of the adapter sleeve 22 complements the solid lubrication of the graphite column, forming a dual protection of mechanical structure and lubricating material, further improving the reliability and durability of the eccentric shaft 21. As a solid lubricant, the graphite column does not require the addition of additional lubricating oil or grease, simplifying maintenance work, while avoiding lubricant contamination of the film slitting environment, effectively controlling the wear of the eccentric shaft 21, and maintaining the fitting accuracy between the eccentric shaft 21 and the linkage port 26 for a long time, ensuring the accuracy and stability of the angle adjustment of the slitting blade 207.

[0034] During operation, the film roll to be slit is assembled onto the main frame 7, which performs the unwinding and rewinding after slitting. Before slitting the film roll, the spacing between the multiple slit blades 207 needs to be adjusted according to processing requirements. The system first controls the reduction motor 307 to run, and its output shaft drives the second gear to rotate on the tooth surface of the third tooth plate 306, thereby driving the slide table 305 to slide on the second slide rail 302 via the second slide block 303. After the slide table 305 slides to the front of the leftmost or rightmost slit blade 207, the system controls the reduction motor 307 to stop and controls the cylinder 316 to retract. One end of the cylinder 316 rotates around the second adapter frame 317 via the second adapter 315, and the other end is connected to... The first adapter 304 rotates around the first adapter frame 308, transmitting the pulling force to the drive shaft 311 via the first adapter 304 and the first adapter frame 308. This, in turn, pushes the buckle plate 313 towards the first slide block 203 via the drive shaft 311. After the two sleeves 314 enter the two mating slots 221 respectively, the system control cylinder 316 continues its retraction motion, compressing the second spring 312 to cause elastic deformation. The extension end of the cylinder 316 pushes the drive shaft 210 into the through hole 208. During this pushing process, the drive shaft 210 drives the first gear 219 to rotate via the first toothed plate 214. Utilizing the meshing relationship between the first gear 219 and the second toothed plate 217, it pushes the driven shaft in the opposite direction. 215. Driven by multiple driven shafts 215, the anti-slip plate 220 disengages from the cutter holder 201. Since the two sleeves 314 have entered the docking groove 221, the combination between the buckle plate 313 and the first slide block 203 is completed. The system controls the reduction motor 307 to work again until the first slide block 203 moves to the required position. Subsequently, the system controls the cylinder 316 to extend. After the transmission shaft 311 disengages from the drive shaft 210, the first spring 212 between the pressure plate 211 and the support seat 209 begins to perform an elastic reset movement, driving multiple driven shafts 215 to simultaneously push the anti-slip plate 220, making it tightly adhere to the cutter holder 201, ensuring the positioning stability of the first slide block 203. The above operation is repeated to complete multiple slitting operations in sequence. The cutting position adjustment of the blade 207 is achieved by independently locking multiple first slides 203 through a mechanical mechanism, replacing the traditional air circuit adjustment. Through mechanical transmission and locking, the spacing of each cutting blade 207 can be independently and precisely adjusted, avoiding the problem of inconsistent adjustment caused by air pressure fluctuations or pipeline differences. The elastic pressing and locking method between the anti-slip plate 220 and the blade holder 201 is adopted, combined with the restoring force of the first spring 212, to ensure that the first slide 203 does not shift during operation, improving cutting stability and finished product quality. Through the coordinated cooperation of mechanical mechanisms such as cylinder 316, gear tooth plate linkage, and spring return, the locking and unlocking of the slides is completed in a purely mechanical way, avoiding the use of complex air circuits and pneumatic control components. During the unwinding, slitting, and rewinding of the film roll on the main frame 7, multiple pressure rollers 14 roll on the film in the transmission state. Due to slight differences in thickness, hardness, or additive distribution in the transverse direction of the film, the reaction force from the film on the multiple pressure rollers 14 changes. This process is monitored in real time by pressure sensor 13. The system analyzes, processes, and judges the monitoring data. When the monitoring data value exceeds the set threshold, the system controls the corresponding electric cylinder 11 to retract. The extension end of the electric cylinder 11 applies a pulling force to the side seat 8 through the linkage shaft 27. The side seat 8 slides in the slide groove 9 through the slider 10, thereby reducing the contact pressure between the slitting blade 207 and the film at that location. This measure can prevent individual slitting blades 207 from wearing out too quickly and ensure that the wear degree of each slitting blade 207 is consistent. The resistance and compression deformation generated by the slitting blades 207 with consistent wear are similar to those of the film, thereby avoiding the damage caused by individual slitting blades 207 being too dull. Local tension fluctuations are effectively reduced, thus minimizing problems such as wavy edges, warping, or uneven winding of the film after slitting. The pressure sensor 13 monitors the force changes of each pressure roller 14 in real time, and combined with the closed-loop control of the electric cylinder 11, the contact pressure between the slitting blade 207 and the film is adaptively adjusted, improving the intelligence level of the equipment. This avoids premature wear of individual slitting blades 207 due to local film differences, making the wear degree of all slitting blades 207 more uniform, extending the overall service life of the blades, reducing the replacement frequency and maintenance costs. Blades with uniform wear exert similar resistance and compression deformation on the film, effectively suppressing local tension fluctuations caused by blade dulling, ensuring tension stability during the slitting process, significantly reducing defects such as wavy edges, warping, and uneven winding caused by uneven tension, improving the film slitting yield and edge neatness. For films with uneven thickness, hardness, or additive distribution, the system has good adaptability, broadening the equipment's adaptability to different film materials. By loosening multiple bolts 206 in sequence, the tilt angle of each slitting blade 207 is adjusted according to the slitting requirements of the film roll to be slit, thereby controlling the contact pressure between the slitting blade 207 and the film. During the adjustment of one slitting blade 207 rotating around bolt 206, the tilt angle adjustment seat 205 slides within the corresponding linkage port 26 via the eccentric shaft 21, thereby generating an upward thrust or downward pressure on the inner wall of the linkage port 26. Under the action of this thrust, the linkage frame 20 drives multiple sliding rods 18 to slide within multiple rod sleeves 19 via the fixed seat 17, thus limiting the movement of the multiple linkage frames 20 and ensuring that the multiple linkage frames 20 only move vertically. This ensures the consistency of the tilt angle adjustment of the multiple slitting blades 207, making the wear of each slitting blade 207 more even. Through the sliding cooperation between the eccentric shaft 21 and the linkage port 26, and the sliding of the linkage frame 20... The vertical guide limit achieved by rod 18 and rod sleeve 19 ensures that multiple slitting blades 207 maintain synchronization and consistency when adjusting the tilt angle, avoiding individual blade angle deviations. The contact pressure between each slitting blade 207 and the film tends to be consistent, which is beneficial for the film to be subjected to uniform force in the width direction, improving the stability of the slitting process and the quality of the finished product. The consistency of the tilt angle makes the wear rate of each slitting blade 207 similar, avoiding premature wear of individual blades due to angle deviations, extending the overall blade life, and reducing the replacement frequency. Only by loosening the bolt 206 in sequence and adjusting one slitting blade 207, the remaining slitting blades 207 will automatically follow the adjustment through linkage, reducing repeated calibration operations and improving adjustment efficiency and convenience. This structure restricts non-vertical movement, avoiding offset or shaking during the adjustment process, ensuring precise control of the angle relationship between the slitting blade 207 and the film, which is conducive to obtaining a neater slitting edge. During the movement of the eccentric shaft 21 within the corresponding linkage port 26, the sliding friction is converted into rotational friction by the adapter sleeve 22, thereby effectively reducing the wear between the eccentric shaft 21 and the linkage port 26. Simultaneously, under the action of multiple second elastic pads 25, the ends of multiple second graphite pillars 24 remain in contact with the axial surface of the eccentric shaft 21, further delaying the wear process of the eccentric shaft 21 and providing good lubrication and protection. The adapter sleeve 22 converts the sliding friction between the eccentric shaft 21 and the linkage port 26 into rotational friction, significantly reducing frictional resistance and surface wear, and extending the service life of the eccentric shaft 21 and the linkage port 26. Under the elastic support of 25, the end of the second graphite column 24 is always attached to the axial surface of the eccentric shaft 21, realizing continuous lubrication and avoiding dry friction caused by lubrication interruption. The optimized friction form of the adapter sleeve 22 complements the solid lubrication of the graphite column, forming a dual protection of mechanical structure and lubricating material, further improving the reliability and durability of the eccentric shaft 21. As a solid lubricant, the graphite column does not require the addition of additional lubricating oil or grease, simplifying maintenance work, while avoiding lubricant contamination of the film slitting environment, effectively controlling the wear of the eccentric shaft 21, and maintaining the fitting accuracy between the eccentric shaft 21 and the linkage port 26 for a long time, ensuring the accuracy and stability of the angle adjustment of the slitting blade 207.

[0035] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A film slitting mechanism, including a bottom blade shaft; characterized in that: The film is attached to the surface of the bottom blade shaft and conveyed forward. A slitting assembly is provided above the bottom blade shaft. The slitting assembly has multiple slitting blades built in it for slitting the film. An adjustment assembly is provided in front of the slitting assembly for adjusting the spacing between the multiple slitting blades.

2. The film slitting mechanism according to claim 1, characterized in that: The slitting assembly includes a blade holder disposed above the bottom blade shaft. A first slide rail is mounted on the front side of the blade holder, and a plurality of first slide blocks are slidably disposed on the first slide rail. A blade holder is fixedly connected to the bottom of each first slide block. An angle adjustment seat is provided on the side of the blade holder. The angle adjustment seat and the blade holder are connected by bolts to adjust the tightness between the two. A sliding groove is opened on the end face of the angle adjustment seat, and a slider is slidably connected in the sliding groove. A side seat is fixedly connected to the side of the slider away from the angle adjustment seat. The slitting blade is detachably mounted on the side seat.

3. The film slitting mechanism according to claim 2, characterized in that: The first slide has a through hole, and a support seat is engaged in the through hole. A drive shaft slides through the axis of the support seat. A pressure plate is connected to the front end of the drive shaft, and a first spring is sleeved on the drive shaft. The first spring is supported between the opposing surfaces of the pressure plate and the support seat. A first toothed groove is formed at the other end of the drive shaft, and a first toothed plate is connected to the inner wall of the first toothed groove.

4. The film slitting mechanism according to claim 3, characterized in that: On the support base, corresponding to the side position of the first toothed plate, a plurality of driven shafts are slidably arranged. The plurality of driven shafts are distributed in a circular array. The rear end of each driven shaft is provided with a second tooth groove. A second toothed plate is connected to the inner wall of the second tooth groove. The second toothed plate and the first toothed plate are meshed with the same first gear. A converter shaft is snapped at the axis of the first gear. The end of the converter shaft is rotatably connected to the inner wall of the through hole. The rear ends of the plurality of driven shafts are connected to a common anti-slip plate. The rear of the anti-slip plate abuts against the tool holder.

5. The film slitting mechanism according to claim 4, characterized in that: The distance adjustment assembly includes a traveling frame disposed in front of the tool holder. The front and rear sides of the bottom of the traveling frame are connected to second slide rails. A second slide block is slidably connected to each of the two second slide rails. The bottom of the two second slide blocks is connected to a slide table. A reduction motor is installed at the bottom of the slide table. A second gear is installed on the output shaft of the reduction motor. A third toothed plate that meshes with the second gear is connected to the inner side wall of the traveling frame.

6. The film slitting mechanism according to claim 5, characterized in that: The bottom of the slide table is connected to two third slide rails, and a third slide block is slidably connected to the two third slide rails. The bottom of the third slide block is connected to a drive shaft, and a second adapter is rotatably connected to the drive shaft. The bottom of the second adapter is rotatably connected to a first adapter, and a cylinder is installed at the other end of the first adapter. The telescopic end of the cylinder is connected to a second adapter, and a second adapter is rotatably connected to the second adapter. The top of the second adapter is connected to the bottom of the slide table. The other end of the drive shaft is slidably connected to a buckle plate, and the back of the buckle plate is connected to two housings. Two mating grooves are opened on the tool holder corresponding to the positions of the two housings. A second spring is sleeved on the drive shaft, and the drive shaft and the buckle plate are elastically supported by the second spring.

7. A slitting machine, characterized in that: Includes a bottom blade shaft, a slitting assembly, and a spacing adjustment assembly as described in any one of claims 1-6, wherein the bottom blade shaft, the slitting assembly, and the spacing adjustment assembly are all disposed on the inner side of the main frame, and the main frame is used for unwinding the film and rewinding it after slitting. A first lubrication cavity is provided on multiple contact surfaces of the first slide block and the first slide rail. A first graphite column is embedded in each first lubrication cavity. One end of the first graphite column abuts against the first slide rail, and the other end of the first graphite column is connected to a first elastic pad. The first elastic pad is connected to the inner bottom surface of the first lubrication cavity.

8. The film slitting machine according to claim 7, characterized in that: An electric cylinder is fixedly installed on the angle adjustment seat. The telescopic end of the electric cylinder is fixedly connected to a linkage shaft. The other end of the linkage shaft is fixedly connected to a side seat. A bending shaft is connected to the back of the blade holder corresponding to the position of the slitting blade. A pressure roller is provided below the bending shaft. A pressure sensor is installed between the pressure roller and the bending shaft.

9. The film slitting machine according to claim 8, characterized in that: Each of the aforementioned angle adjustment seats is connected to an eccentric shaft, and a linkage frame is provided on the side of each of the aforementioned angle adjustment seats corresponding to its respective eccentric shaft. The linkage frame has a linkage port, and the plurality of eccentric shafts are slidably connected to the plurality of linkage ports respectively. Each of the multiple linkage frames is connected to a fourth slide block at its top. The inner sides of the multiple fourth slide blocks are slidably connected to the same fourth slide rail. The top of the fourth slide rail is connected to multiple slide rods. The top of each slide rod is fitted with a rod sleeve. The top of each rod sleeve is connected to the inner wall of the main frame.

10. The film slitting machine according to claim 9, characterized in that: An adapter sleeve is fitted onto the eccentric shaft. The eccentric shaft is rotatably connected to the inner wall of the corresponding linkage port through the adapter sleeve. Multiple second lubrication cavities are opened on the inner wall of the adapter sleeve. A second graphite column is embedded in each second lubrication cavity. One end of the second graphite column abuts against the axial surface of the eccentric shaft, and the other end of the second graphite column is connected to a second elastic pad. The second elastic pad is connected to the inner bottom surface of the second lubrication cavity.

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