An anti-scratch BOPP film slitting device

Abstract

The present invention discloses a scratch-proof BOPP film slitting device, which includes a frame. One end of the frame is provided with a wire winding roller, and the other end of the frame is provided with a wire splitting roller assembly. The frame is provided with an extrusion device for pulling the rolled film beside the wire winding roller. The frame is provided with a cutting assembly at the top of the wire splitting roller assembly for cutting the film. This scratch-proof BOPP film slitting device is convenient for replacing the film roll by arranging a wire winding roller on the frame that can withdraw the film roll. Only by manually stretching the unsealed film on the film roll between two pressure rollers in the early stage, the two pressure rollers clamp one end of the film due to their own weight, and the fixing function is simply and conveniently realized. After the second hydraulic rod drives the third hydraulic rod shaft to rotate and become vertical, the two pressure rollers respectively fall into the semi-circular grooves and the blocks, and then the two pressure rollers are transported in parallel by the electric push rod, which is convenient to realize the film slitting work during this period.

Description

Technical Field

[0001] The present invention relates to the technical field of thin film product slitting devices, and specifically to an anti-scratch BOPP thin film slitting device. Background Art

[0002] The production of BOPP thin films is to first make the melt of high molecular weight polypropylene into sheets or thick films through a long and narrow die head, and then in a special stretching machine, at a certain temperature and a set speed, stretch simultaneously or step by step in two perpendicular directions (longitudinal, transverse), and through appropriate cooling or heat treatment or special processing (such as corona treatment, coating, etc.) to make the thin film.

[0003] The existing BOPP thin films are formed in one step. Since the size width specification is very large, they are often cut into multiple thin film strips with relatively small widths according to the usage needs. This involves a slitting device for the thin films. The existing slitting devices can not only be used to cut thin films, but also cut other objects with relatively small thicknesses, such as paper, etc. In the slitting device, most are made of roller tracks and cutting blades, with simple structures and principles. The working principle is to first wind the prefabricated BOPP thin film around the roller track at one end of the equipment, then manually pull it to the bottom of the cutting knife on the equipment, then start the equipment to run, slit the thin film into multiple thin film strips with different widths, continue to manually pull, bind the multiple thin film strips to the roller tracks at different positions at the other end of the equipment, and finally start the segmented roller track to rotate, and control the reduction gear to ensure that the running speeds of each roller track are the same. However, such an operation has a problem. After the already cut thin film strip is pulled manually, one end of it is bound to the sub-roller through transparent tape, and the sub-roller needs to be adjusted for winding the thin film strip; when adjusting, it is very troublesome to pass the thin film strip through all the roller tracks, and it is difficult to calibrate when manually placing the thin film strip during the pulling process. This is also due to the problem that the thin film is not thick enough and it is easy to break when the manual force is controlled. For this reason, we propose an anti-scratch BOPP thin film slitting device. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-scratch BOPP thin film slitting device to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: An anti-scratch BOPP film slitting device, including a frame, one end of the frame is provided with a wiring roller, the other end of the frame is provided with a wire dividing roller assembly, the frame is provided with an extrusion device for pulling the rolled film beside the wiring roller, the frame is provided with a cutting assembly for cutting the film above the wire dividing roller assembly, both ends of the frame are provided with guiding assemblies at the bottom of the wire dividing roller assembly for docking with the extrusion device, and a rotary driving member capable of changing the position of the guiding assembly is installed on the opposite surfaces of the frame; the guiding assembly drives the film to be introduced below the cutting assembly through the rotary driving member.

[0006] Preferably, both sides inside the frame are installed with storage boxes, the opposite surfaces of the two storage boxes are installed with second hydraulic rods, and one end of the output rod of each second hydraulic rod is rotatably connected with a third hydraulic rod. The extrusion device includes a contact rod provided at one end of the output rod of each third hydraulic rod, a chute provided at one end of the contact rod, and a pair of wire pressing rollers movably arranged between the two chutes.

[0007] Preferably, the rotary driving member includes a pair of first springs provided on both sides inside the frame, a second arc-shaped chute provided inside each first spring, a pair of guiding blocks provided on the frame near the lower part of the wire dividing roller assembly, a first arc-shaped chute provided on the frame near one side of the guiding block, and an electric push rod movably connected between the second arc-shaped chute and the first arc-shaped chute; the guiding assembly includes a connecting plate provided at one end of the electric push rod facing the extrusion device, a second spring provided on the connecting plate, a clamping block slidably arranged on the connecting plate at one end of the second spring, and a semi-circular groove provided on one side of the top of the connecting plate, and the calibers of the clamping block and the semi-circular groove are equal.

[0008] Preferably, first hydraulic rods are installed on both sides in the middle of the frame, a tool rest is installed at the top between the two first hydraulic rods, a plurality of cutting knives are slidably installed on the tool rest, and each cutting knife is fastened to the tool rest by threads.

[0009] Preferably, a transmission roller is installed between the wire dividing roller assembly and the tool rest, a height limiting frame is sleeved outside the transmission roller, a fixing rod is installed above the transmission roller on the frame, and a plurality of measuring scales are slidably installed on the fixing rod, and the measuring scales are made of a pair of iron sheet blades folded together.

[0010] Preferably, the wire dividing roller assembly includes a film dividing roller rotatably connected to one side inside the frame, a gas transition chamber rotatably connected to the other side inside the frame, a pair of magnets disposed opposite to the film dividing roller and the gas transition chamber, and a matching block movably installed between the pair of magnets. A plurality of air holes are formed in the film dividing roller, and an air permeable hole is formed in the matching block and is in air hole matching correspondence with the air holes. The inside of the gas transition chamber communicates with the air holes through the matching block.

[0011] Preferably, the cutting assembly includes a fixing frame, a sliding rod disposed at the top between the two fixing frames, a first motor sliding on the sliding rod, a fixing plate disposed on the first motor, a rack disposed in the middle between the two fixing frames, a gear sleeved on the output shaft of the first motor and meshing with the rack, and a second motor disposed at the bottom of the fixing plate.

[0012] Preferably, the frame is provided with a slide rail at one end of the wire laying roller. A slide frame is slidably connected to the slide rail and is matched with one end of the wire laying roller. Slide ways are installed on the opposite sides between the two storage boxes, and a film pressing roller is slidably installed between the two slide ways and contacts the wire laying roller.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] In the present invention, a wire laying roller capable of withdrawing a film roll is provided on the frame, which is convenient for replacing the film roll. Only by manually stretching the unsealed film on the film roll between the two wire pressing rollers in the early stage, the two wire pressing rollers clamp one end of the film due to their own weight, and the fixing function is simply and conveniently realized. After the second hydraulic rod drives the third hydraulic rod shaft to rotate and become vertical, the two wire pressing rollers respectively fall onto the semi-circular grooves and the clamping blocks. Then, the two wire pressing rollers are horizontally transported by the electric push rod, which is convenient for realizing the film cutting work during this period. After the film is cut, the rotating film dividing roller with negative pressure sucks the film strip. Finally, the second motor drives the cutting machine to cut off the excess film, so that the equipment successfully completes the cutting. And during the cutting process, the cut film strip is smoothly wound on the film dividing roller. The whole process does not require manual full intervention, making the operation process flow, avoiding the trouble caused by manual adjustment of the film strip. The implementation principle is simple, the structure is reasonable, and the disassembly of the equipment is also relatively simple, having a certain application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the overall top view structure of the present invention;

[0017] Figure 3 is of the present invention Figure 1 is an enlarged schematic diagram of part A in;

[0018] Figure 4 Schematic diagram of the internal structure of half of the devices of the present invention;

[0019] Figure 5 Schematic diagram of the structure of the extrusion device of the present invention;

[0020] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of part B in the present invention;

[0021] Figure 7 Schematic diagram of the structure of the wire dividing roller assembly of the present invention.

[0022] In the figure: 1 - frame; 2 - storage box; 3 - wiring roller; 301 - slide rail; 4 - first hydraulic rod; 5 - guiding assembly; 501 - semi-circular groove; 6 - film pressing roller; 601 - carriage; 7 - slideway; 8 - tool rest; 9 - fixing rod; 10 - measuring scale; 11 - fixing frame; 12 - first motor; 13 - rack; 14 - slide bar; 15 - fixing plate; 1501 - second motor; 16 - extrusion device; 1601 - wire pressing roller; 1602 - chute; 1603 - contact rod; 17 - second hydraulic rod; 18 - third hydraulic rod; 19 - wire dividing roller assembly; 20 - film dividing roller; 21 - matching block; 22 - air hole; 23 - magnet; 24 - gas transition cavity; 25 - height limiting frame; 26 - first arc chute; 27 - second arc chute; 28 - first spring; 29 - guiding block; 30 - connecting plate; 31 - second spring; 32 - clamping block. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-7 , the present invention provides a technical solution: an anti-scratch BOPP film slitting device, including a frame 1. In the direction directly viewed in the figure, a wiring roller 3 (for binding the unslit finished film roll) is provided at one end of the frame 1, and a wire dividing roller assembly 19 (for winding the slit film strip, such as Figure 7As described in, it has adsorption brought by air pressure, which is described below), the frame 1 is provided with an extrusion device 16 for pulling the rolled film apart next to the wiring roller 3 (in order to assist the stretching of the film on the wiring roller 3, the extrusion device 16 is used instead of manual pulling), the frame 1 is provided with a cutting component for cutting the film on the top of the dividing roller assembly 19 (the cutting work is completed after the dividing roller assembly 19 rolls up the film strip, and then the dividing roller assembly 19 is operated to adsorb the cut film strip onto the dividing roller assembly 19), both ends of the frame 1 are provided with guide components 5 that are docked with the extrusion device 16 at the bottom of the dividing roller assembly 19, and a rotating drive member that can change the position of the guide component 5 is installed on the opposite side of the frame 1 (the rotating drive member is to ensure that the cutting component can cut the film when it is working); the guide component 5 drives the film to be introduced into the bottom of the cutting component through the rotating drive member, and when the equipment starts working, a complete film roll needs to be placed on the wiring roller 3, and the film roll is arranged according to Figure 1 and 2 In the direction indicated in the figure, slide along the left side of the wiring roller 3 onto the wiring roller 3, and then manually pull the unclosed end of the film roll and put it into the extrusion device 16. The extrusion device 16 fixes the end after clamping, and has a certain anti-slip performance. Then the extrusion device 16 is controlled by the program, the extrusion device 16 rises and docks with the guide component 5 after movement. After docking, the guide component 5 is driven by the rotating drive member to retract toward the bottom of the dividing roller component 19. When the rotating drive member moves, in order to better make the film and the surface of the dividing roller component 19 fit together, the device adopts that when the guide component 5 is about to be located on the surface of the dividing roller component 19, the rotating drive member drives the guide component 5 to rotate slightly, so that the film on the guide component 5 can fit the surface of the dividing roller component 19, and then the film inside the extrusion device 16 located on the guide component 5 is cut off by the cutting component, because at this time the finished film roll and the film strip are still connected together, and the air inside the dividing roller component 19 can be used again after the cutting component is cut to roll the slit film strip together, ( Figures 1-2 The center line-dividing roller assembly 19 and the wiring roller 3 are controlled by independent motors. The parameters of the two motors can be set to be consistent. The unmarked roller at the bottom of the line-dividing roller assembly 19 has a certain load-bearing effect and will not be wasted. When necessary, it can be converted from electric to manual operation).

[0025] Finished product design issues: First, the film is cut according to the needs of use, and then the film is designed with anti-scratch edge sealing technology. The film is passivated on the basis of the original BOPP film. Another device needs to be set up for passivation treatment. Therefore, users can prevent scratches when using it, which makes the film have a good use prospect and makes the film have higher performance.

[0026] First, according to the process regulations, storage boxes 2 are installed on both sides inside the frame 1. Second hydraulic rods 17 are installed on the opposite sides of the two storage boxes 2. At one end of the output rod of each second hydraulic rod 17, a third hydraulic rod 18 is rotatably connected. The extrusion device 16 includes a contact rod 1603 provided at one end of the output rod of each third hydraulic rod 18, a chute 1602 provided at one end of the contact rod 1603, and a pair of wire pressing rollers 1601 movably arranged between the two chutes 1602. For example Figure 2 In this case, first, for usage considerations, the output rods of the second hydraulic rod 17 and the third hydraulic rod 18 need to reach the extreme row spacing because this reduces the later maintenance of the two. If the row spacing of the second hydraulic rod 17 and the third hydraulic rod 18 cannot reach the amount required by the load during long-term use, it may cause the seals of the two to age after long-term wear and require regular maintenance. In combination with the present invention, first, one end of the film is manually placed between the two wire pressing rollers 1601. Due to its own weight and the inclination of the chute 1602, the wire pressing roller 1601 slides on the chute 1602 and presses the film against the other wire pressing roller 1601. When the output rod of the second hydraulic rod 17 moves, it drives the rotation of the shaft of the third hydraulic rod 18 (the third hydraulic rod 18 is in a non-working state). When the row spacing of the output rod of the second hydraulic rod 17 reaches the peak, that is, when the second hydraulic rod 17 drives the third hydraulic rod 18 to stand upright on the device, the third hydraulic rod 18 starts to work and drives the output rod to rise. During the rotation of the shaft of the third hydraulic rod 18, the two wire pressing rollers 1601 continuously rotate around the shaft of the third hydraulic rod 18. Then, when the row spacing of the third hydraulic rod 18 is about to reach the extreme, one of the wire pressing rollers 1601 contacts the guiding component 5. After that, when the row spacing of the third hydraulic rod 18 reaches the limit, the other wire pressing roller 1601 flips onto the guiding component 5 with the previous wire pressing roller 1601 as the fulcrum, thus completing the preliminary docking work;

[0027] The guiding component 5 includes a connecting plate 30 provided at one end of the electric push rod (the electric push rod is introduced below) facing the extrusion device 16, a second spring 31 provided on the connecting plate 30, a clamping block 32 slidably arranged on the connecting plate 30 at one end of the second spring 31, and a semi-circular arc groove 501 provided on one side of the top of the connecting plate 30. The caliber of the clamping block 32 and the semi-circular arc groove 501 are equal. From Figure 3 it can be seen that when the wire pressing roller 1601 contacts the clamping block 32, due to the supporting characteristic of the second spring 31 (initially in a normal state), the wire pressing roller 1601 slides along the surface of the clamping block 32 and drives the clamping block 32 to rise (from Figure 3It is known that the second spring 31 begins to stretch upward), so that when one of the wire pressing rollers 1601 slides on the clamping block 32, its orientation changes, and the positions of the two wire pressing rollers 1601 change. Then, when the wire pressing roller 1601 crosses the clamping block 32, since there is no contact between the wire pressing roller 1601 and the clamping block 32, the second spring 31 will quickly retract. Then, the output rod of the third hydraulic rod 18 is controlled to descend, so that one of the wire pressing rollers 1601 falls on the clamping block 32. Since the positions of the two wire pressing rollers 1601 have changed, and the contact force with the clamping block 32 during the descent causes the other wire pressing roller 1601 to enter the semi-circular arc groove 501. At this time, the extrusion device 16 is delivered to the rotary drive member for control.

[0028] On both sides of the middle of the frame 1, first hydraulic rods 4 are installed. At the top between the two first hydraulic rods 4, a tool rest 8 is installed. A plurality of cutting tools are slidably installed on the tool rest 8, and each cutting tool is fastened to the tool rest 8 by threads. The first hydraulic rod 4 does not interfere with the rotary drive member at first. Therefore, one end of the output rod of the first hydraulic rod 4 needs to support the tool rest 8 at a high position in the equipment at the beginning, so that the guiding component 5 can pass through. Then, in the present technology, the cutting tool fixing seat is provided with a certain magnetism.

[0029] The rotation driving member includes a pair of first springs 28 disposed on both sides inside the frame 1, a second arc-shaped chute 27 disposed inside each first spring 28, a pair of guide blocks 29 disposed on the frame 1 near the lower side of the wire dividing roller assembly 19, a first arc-shaped chute 26 disposed on the frame 1 near one side of the guide block 29, and an electric push rod movably connected between the second arc-shaped chute 27 and the first arc-shaped chute 26. The guiding assembly 5 on the electric push rod is in the longest state of output induction before docking with the extrusion device 16. Then, after the guiding assembly 5 receives the two wire pressing rollers 1601, due to the PLC controlling the output rod of the electric push rod to retract, the thin film between the two wire pressing rollers 1601 then passes under the tool rest 8. At this time, the first hydraulic rod 4 is started to descend. A motor is connected to one end of the tool rest 8 to rotate the cutting knife on the tool rest 8. After setting different distances for each cutting knife in advance, the thin film is driven to be slit. Then, the output rod of the electric push rod continues to retract. After the output rod is shortened to the lowest stroke, due to the driving action of the semi-circular guide block 29, the semi-circular groove 501 on the output rod of the electric push rod slides on the guide block 29. When the semi-circular groove 501 moves, the whole electric push rod rotates and slides along the axis of the first arc-shaped chute 26, so that one end of the electric push rod compresses the first spring 28 located inside the second arc-shaped chute 27. During this process, the output rod of the electric push rod drives the thin film between the two wire pressing rollers 1601 to approach the wire dividing roller assembly 19. After the wire dividing roller assembly 19 adsorbs the thin film, the redundant thin film located between the two wire pressing rollers 1601 is then cut off by the cutting assembly. After the thin film between the two wire pressing rollers 1601 is cut off, the semi-circular groove 501 drops from the guide block 29, and the electric push rod resets to the normal state due to the push of the first spring 28 and its own weight;

[0030] The cutting assembly includes a fixed frame 11, a sliding rod 14 disposed at the top between the two fixed frames 11, a first motor 12 sliding on the sliding rod 14, a fixing plate 15 disposed on the first motor 12, a rack 13 disposed in the middle between the two fixed frames 11, a gear sleeved on the output shaft of the first motor 12 and meshing with the rack 13, and a second motor 1501 disposed at the bottom of the fixing plate 15. When the thin film between the two wire pressing rollers 1601 is located below the fixed frame 11, at this time, the first motor 12 can be controlled to start through a driving program. The shaft of the first motor 12 drives the gear to move on the rack 13, so that the first motor 12 moves on the sliding rod 14. When the first motor 12 moves, it drives the second motor 1501 at the bottom of the fixing plate 15 to move. After the second motor 1501 is started, it drives the cutting blade to remove the redundant part of the thin film.

[0031] The wire dividing roller assembly 19 includes a film dividing roller 20 rotatably connected to one side inside the frame 1, a gas transition chamber 24 rotatably connected to the other side inside the frame 1, a pair of magnets 23 disposed opposite to the film dividing roller 20 and the gas transition chamber 24, and a matching block 21 movably installed between the pair of magnets 23. A plurality of air holes 22 are formed in the film dividing roller 20. An air permeation hole is formed in the matching block 21 and is matched with the air holes 22. The inside of the gas transition chamber 24 communicates with the film dividing roller 20 through the matching block 21 and the air holes 22. When the two wire pressing rollers 1601 are located below the film dividing roller 20, the inside of the film dividing roller 20 is evacuated to make it have a negative pressure capacity. First, a pipeline is connected to one end of the gas transition chamber 24, and this pipeline is connected to an air extraction pump. Since the gas transition chamber 24 is respectively connected to the matching block 21 and the film dividing roller 20, the air inside the film dividing roller 20 is discharged by the air extraction pump, so that the film can be adsorbed. Then, the motor is started to rotate the film dividing roller 20. After the film on the wiring roller 3 is used up, multiple film rolls on the film dividing roller 20 need to be collected and processed. Then, the matching block 21 and the magnet 23 are separated manually, and then the multiple film rolls are respectively slid out. The bottom of the matching block 21 is a magnetic body, and the matching block 21 needs to be designed with light weight to prevent affecting the load.

[0032] This step is used for adjusting the initial tool position and the film position. A transmission roller is installed between the wire dividing roller assembly 19 and the tool holder 8. A height limiting frame 25 is sleeved outside the transmission roller. A fixed rod 9 is installed above the transmission roller on the frame 1. A plurality of measuring scales 10 are slidably installed on the fixed rod 9. The measuring scales 10 are made of a pair of iron sheet blades folded together. First, it is necessary to manually measure the distance of the cutting tool on the tool holder 8 and then fix it with a thread. Then, the measuring scale 10 is rotated manually so that one of the iron sheet blades of the measuring scale 10 attracts the cutting tool and the cutting tool fixing seat. Then, the other iron sheet blade is rotated to contact the surface of the film dividing roller 20 after rotation, so that the winding position of the film tape on the surface of the film dividing roller 20 can be confirmed, and the iron sheet blade can also correct the film tape during the winding of the film when the film dividing roller 20 rotates, preventing the film from running off easily when the film dividing roller 20 winds the film.

[0033] The frame 1 is provided with a slide rail 301 at one end of the wiring roller 3. A slide frame 601 is slidably connected to the slide rail 301 and matches one end of the wiring roller 3. Slide ways 7 are installed on the opposite sides of the two 5. A film pressing roller 6 is slidably installed between the two slide ways 7 and contacts the wiring roller 3. When a new film roll needs to be replaced, the old film roll coil seat can be slid out of the wiring roller 3 at this time. During the operation, the slide frame 601 can be separated from one end of the wiring roller 3, and the old film roll coil seat can be directly pulled out. The function of the film pressing roller 6 is to prevent the film from being easily loosened when being pulled and to prevent the whole film roll from being pulled askew.

[0034] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scratch-proof BOPP film slitting device, comprising a frame (1), characterized in that: One end of the frame (1) is provided with a wiring roller (3), the other end of the frame (1) is provided with a wire splitting roller assembly (19), the frame (1) is provided with an extrusion device (16) beside the wiring roller (3) for pulling the rolled film, the frame (1) is provided with a cutting assembly at the top of the wire splitting roller assembly (19) for cutting the film, both ends of the frame (1) are provided with guiding assemblies (5) at the bottom of the wire splitting roller assembly (19) for docking with the extrusion device (16), and a rotary driving member capable of changing the position of the guiding assembly (5) is installed on the opposite surfaces of the frame (1); the guiding assembly (5) drives the film to be introduced below the cutting assembly through the rotary driving member; A transmission roller is installed between the wire splitting roller assembly (19) and the tool rest (8), a height limiting frame (25) is sleeved outside the transmission roller, a fixed rod (9) is installed above the transmission roller on the frame (1), and a plurality of measuring scales (10) are slidably installed on the fixed rod (9), and the measuring scales (10) are made of a pair of iron sheet blades folded together; The wire splitting roller assembly (19) includes a film splitting roller (20) rotatably connected to one side inside the frame (1), a gas transition chamber (24) rotatably connected to the other side inside the frame (1), a pair of magnets (23) arranged on the opposite sides of the film splitting roller (20) and the gas transition chamber (24), and a matching block (21) movably installed between the pair of magnets (23). A plurality of air holes (22) are formed in the film splitting roller (20), air permeating holes are formed in the matching block (21) and are matched with the air holes (22), and the inside of the gas transition chamber (24) communicates with the air holes (22) through the matching block (21).

2. A scratch-proof BOPP film slitting device according to claim 1, characterized in that: Receiving boxes (2) are installed on both sides inside the frame (1), second hydraulic rods (17) are installed on the opposite sides of the two receiving boxes (2), and a third hydraulic rod (18) is rotatably connected to one end of the output rod of each second hydraulic rod (17). The extrusion device (16) includes a contact rod (1603) arranged at one end of the output rod of each third hydraulic rod (18), a chute (1602) arranged at one end of the contact rod (1603), and a pair of wire pressing rollers (1601) movably arranged between the two chutes (1602).

3. A scratch-proof BOPP film slitting device according to claim 2, characterized in that: The rotary driving member includes a pair of first springs (28) arranged on both sides inside the frame (1), second arc-shaped chutes (27) arranged inside each first spring (28), a pair of guiding blocks (29) arranged on the frame (1) near the lower part of the wire splitting roller assembly (19), first arc-shaped chutes (26) arranged on the frame (1) on one side close to the guiding blocks (29), and an electric push rod movably connected between the second arc-shaped chutes (27) and the first arc-shaped chutes (26); The guiding component (5) includes a connecting plate (30) provided at one end of the electric push rod facing the extrusion device (16), a second spring (31) provided on the connecting plate (30), a clamping block (32) provided at one end of the second spring (31) and sliding on the connecting plate (30), and a semi-circular arc groove (501) provided on one side of the top of the connecting plate (30). The clamping block (32) and the semi-circular arc groove (501) have the same caliber size.

4. A BOPP film slitting device for preventing scratching according to claim 1, characterized in that: Both sides of the middle part of the frame (1) are installed with first hydraulic rods (4). At the top between the two first hydraulic rods (4), a tool rest (8) is installed. A plurality of cutting knives are slidably installed on the tool rest (8), and each cutting knife is fastened to the tool rest (8) by threads.

5. A BOPP film slitting device for preventing scratching according to claim 1, characterized in that: The cutting component includes a fixed frame (11), a sliding rod (14) provided at the top between the two fixed frames (11), a first motor (12) sliding on the sliding rod (14), a fixing plate (15) provided on the first motor (12), a rack (13) provided in the middle between the two fixed frames (11), a gear sleeved on the output shaft of the first motor (12) and meshed with the rack (13), and a second motor (1501) provided at the bottom of the fixing plate (15).

6. A BOPP film slitting device for preventing scratching according to claim 2, characterized in that: The frame (1) is provided with a slide rail (301) at one end of the wire winding roller (3). A slide frame (601) is slidably connected to the slide rail (301) and matches one end of the wire winding roller (3). Slideways (7) are installed on the opposite sides between the two storage boxes (2), and a film pressing roller (6) is slidably installed between the two slideways (7) and contacts the wire winding roller (3).

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