Slitting assembly and film slitting machine

Abstract

The present application relates to the field of packaging and printing technology, and provides a slitting assembly, comprising: a guide roller, on the outside of which the processed product is wound; a mounting portion, wherein an arc-shaped groove is provided on the side of the mounting portion facing the guide roller, and a gap is formed between the bottom of the arc-shaped groove and the outside of the guide roller; a plurality of sliding holes are provided on the mounting portion, wherein the sliding holes are connected to the arc-shaped groove, the sliding holes are arranged along the length direction of the guide roller, and the sliding holes are arranged at intervals in the circumferential direction of the arc-shaped groove; a plurality of knife holders, wherein the knife holders are slidingly adjusted and arranged on the mounting portion, wherein the knife holders are slidingly adjusted along the length direction of the sliding holes, wherein one end of the knife holders is located in the direction of the notch of the arc-shaped groove, and each knife holder is provided with a cutting knife on one end facing the guide roller. Based on this, it is possible to achieve the effect of being convenient for adapting to the needs of product slitting with a smaller width and improving the slitting efficiency.

Description

Technical Field

[0001] The present application relates to the field of packaging and printing technology, and in particular to a slitting assembly and a film slitting machine. Background Art

[0002] At present, in the production process of plastic film, slitting machines are often needed for cutting, which is used to cut the film from wide-width materials into multiple narrow-width materials, that is, to cut a large roll of raw material into multiple rolls of the required width. It is often used in industries such as printing and packaging.

[0003] Existing Chinese patent with announcement number CN219408606U discloses a pneumatic slitting device for a slitting machine, including an air storage rod, a fixed bracket and several knife seats. Connectors are provided between the two ends of the air storage rod and the two ends of the fixed bracket. The connectors are fixedly connected to the fixed bracket and the connectors are rotatably matched with the air storage rod. Several knife seats are provided on the side of the fixed bracket away from the air storage rod. Several knife seats are detachably fixedly connected to the fixed bracket. Several knife seats are provided with electric wheels adjacent to the fixed bracket. The electric wheels are fixedly connected to the knife seats. Several electric wheels are rollingly matched with the fixed bracket. Displacement sensors are provided on the same side of the surfaces of several knife seats. The displacement sensors are fixedly connected to the knife seats. Several displacement sensors are electrically connected to the corresponding electric wheels.

[0004] Regarding the above-mentioned related technologies, the cutting knife is generally mounted on a knife holder, which is adjustably mounted on a fixed bracket. By adjusting the distance between adjacent knife holders, the knife is adjusted so that the distance between the two knife holders reaches the width of the slitting film. However, in actual use of the slitting machine, sometimes the width of the film to be slit is small, and the knife holders have a certain volume and width. Therefore, even when the adjacent knife holders are adjusted to the closest or even mutually fitting position, the distance between the two adjacent knife holders is still greater than the required width, resulting in the inability to slit into multiple sections of the required width at one time. Multiple slitting operations are required, which is inefficient and needs to be improved. Summary of the Invention

[0005] In order to facilitate the application of products with smaller slitting widths and improve slitting efficiency, the present application provides a slitting assembly and a film slitting machine.

[0006] In the first aspect, the present application provides a cutting assembly adopting the following technical solution:

[0007] A slitting assembly comprises: a guide roller, the processed product is wound around the outside of the guide roller; a mounting portion, an arc-shaped groove is provided on the side of the mounting portion facing the guide roller, a gap is formed between the bottom of the arc-shaped groove and the outside of the guide roller, a plurality of sliding holes are provided on the mounting portion, the sliding holes are connected to the arc-shaped groove, the sliding holes are arranged along the length direction of the guide roller, and the sliding holes are arranged at intervals in the circumferential direction of the arc-shaped groove; a plurality of knife seats, the knife seats are slidingly adjusted on the mounting portion, the knife seats are slidingly adjusted along the length direction of the sliding holes, one end of the knife seat is located in the direction of the notch of the arc-shaped groove, and each knife seat is provided with a cutting knife on the end facing the guide roller.

[0008] By adopting the above technical solution, the film product can be passed around the guide roller to provide stable support for the cutter when cutting; when the width of the product to be cut is small, the position of the knife holder on one of the slide holes can be adjusted, and the position of the knife holder on the other slide hole can be adjusted. When the position of the knife holder is adjusted, the cutter is also adjusted accordingly, and then the cutters on different slide holes can be used for coordinated cutting. Since the knife holders are located on different slide holes, the adjustments of the knife holders on adjacent slide holes will not affect each other, thereby avoiding the volume interference caused by the knife holders, so that the distance between the two cutters can be closer, so that multiple narrower products can be cut out at one time, which is convenient for adapting to the needs of product cutting with smaller width and improving the cutting efficiency.

[0009] Preferably, a slide rail is fixed on the outside of the mounting portion and on one side of the slide hole, a slider is connected to the slide rail for sliding adjustment, one end of the knife holder passes through the slide hole and the slider, a screw is provided on the end of the knife holder away from the guide roller, the screw passes through the slider, and the screw is threadedly connected with adjustment nuts that are pressed against the opposite sides of the slider.

[0010] By adopting the above technical solution, the knife holder can be quickly adjusted by cooperating with the slide rail and the slider. During installation, the screw is passed through the slider and clamped on the upper and lower sides of the slider by adjusting the nut. The position of the knife holder can be fixed, and the distance between the cutter and the outer side of the guide roller can be adjusted so that the cutting part of the cutter contacts the film product.

[0011] Preferably, a scale is provided on one side of the mounting portion in the length direction of the slide rail.

[0012] By adopting the above technical solution and setting a scale, it is convenient to quickly determine the position of the knife holder and further determine the interval between two adjacent cutters.

[0013] Preferably, the mounting portion is slidably adjusted in a direction approaching or away from the guide roller, and further includes a driving member for driving the mounting portion to slidably adjust; when the mounting portion is in a working state, the axis of the arc groove and the axis of the guide roller are located in the same straight line.

[0014] By adopting the above technical solution, the driving member can drive the mounting portion to slide and adjust in the direction close to or away from the guide roller, thereby driving each cutter to move synchronously and making the cutters abut against the outside of the guide roller as much as possible at the same time; when the cutter needs to be replaced or cutting needs to be stopped, the cutter can be moved in the direction away from the guide roller.

[0015] Preferably, the parts where the cutters contact and cut the product are close to the same straight line, and the straight line is parallel to the axis direction of the guide roller.

[0016] By adopting the above technical solution, since the width of the product to be cut is small and multiple cutters may be needed to cut it into multiple sections at the same time, and the product may deviate during transportation, the cutting parts of each cutter are set on the same straight line, so that the cutting position of the product is located in the same width direction of the product, rather than cutting at different length positions of the product, which can reduce the error in the width of the cut product.

[0017] Preferably, the mounting portion is provided with a rotating rod at the upper end position of the bottom of the arc-shaped groove, the rotating rod is parallel to the guide roller, and a plurality of elastic spacers are sleeved on the rotating rod, and the elastic spacers are rotated and adjusted around the outer peripheral side of the rotating rod, and the ends of the elastic spacers away from the rotating rod are located on both sides of the cutter, and the lower sides of the elastic spacers overlap the outer side of the guide roller and are close to the position where the cutter contacts the product; when the elastic spacers rotate upward, the elastic spacers leave the moving path of the knife holder and the cutter.

[0018] By adopting the above technical solution, when the position of the cutter is adjusted by sliding the knife holder, the cutters on different sliding holes may collide with each other because the knife holders on different sliding holes will not interfere with each other; and by overlapping the elastic spacer on the guide rollers on the opposite sides of each cutter, while pressing the product to improve the cutting stability and reduce the cutting width error, it can reduce the direct collision between the two adjacent cutters during adjustment and reduce the damage to the cutter; and when the elastic spacer is turned away from the moving path of the cutter and the knife holder, or when it leaves the moving path of the cutter and the knife holder by deformation, the position of each cutter can be adjusted normally, and it is ensured that the elastic spacer enters between the two cutters.

[0019] Preferably, a plurality of clearance grooves are arranged at intervals on the outer side of the guide roller along its own axial direction, and the clearance grooves are arranged around the circumference of the guide roller.

[0020] By adopting the above technical solution, since there are multiple clearance grooves, when the product passes around the guide roller, the cutting part of the cutter can extend into the clearance groove, so the cutter can avoid contact with the outside of the guide roller when cutting the product, reducing the wear of the cutter.

[0021] Preferably, the mounting portion is in the shape of a shell with a hollow interior, and a plurality of chip suction holes are provided at the bottom of the arc-shaped groove. The chip suction holes are connected to the interior of the mounting portion, and a chip extraction component connected to the interior of the mounting portion is provided on the outside of the mounting portion.

[0022] By adopting the above technical solution, since debris will be generated when the product is cut, the mounting shell can cover one side of the guide roller and cover the various cutting parts of the product to reduce the overflow of debris; then the debris can be sucked into the mounting part from the chip suction hole through the chip extraction component, and then enter the chip extraction component to achieve the absorption and collection of the debris, reducing the impact of the debris on the environment.

[0023] Preferably, a through hole is provided on the slider, a positioning strip is provided on the inner wall of the through hole along its own axial direction, a positioning groove is provided on the outer side of the screw along its own axial direction, the screw is inserted into the through hole, and the positioning strip is slidably engaged with the positioning groove.

[0024] By adopting the above technical solution, when the screw passes through the through hole, a sliding fit occurs between the positioning strip and the positioning groove, which can locate the installation position of the mounting seat, thereby ensuring the accuracy of the cutter installation angle.

[0025] In the second aspect, the present application provides a film slitting machine adopting the following technical solution:

[0026] A film slitting machine comprises any one of the slitting components described above.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] (1) By arranging the coordination among the guide roller, the mounting portion, the knife holder, the cutter and the slide hole, the knife holder can be arranged on different slide holes, and the knife holders on different slide holes will not affect each other, so that the interval between the two cutters can be closer, so as to realize the effect of being convenient for adapting to the demand of smaller slitting width of products and improving slitting efficiency;

[0029] (2) By providing a hollow mounting portion, a chip suction hole, and a chip extraction assembly, the spillage of cutting chips can be reduced, while facilitating the absorption and collection of chips, thereby reducing the impact of chips on the environment;

[0030] (3) The installation part is in the shape of a hollow shell, and the chip suction hole and the chip extraction assembly cooperate to cover one side of the cutting part at the same time, and absorb and collect the debris generated by the cutting, thereby reducing the impact of the debris on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the slitting assembly of Example 1;

[0032] Figure 2 This is a schematic diagram of the partial structure of the cutting assembly of Example 1;

[0033] Figure 3 This is a schematic diagram of the structure of Example 1 after the installation portion is hidden;

[0034] Figure 4 This is a schematic diagram of the exploded structure of the tool holder in Example 1;

[0035] Figure 5 Schematic diagram of the structure of the film slitting machine of embodiment 2.

[0036] Figure markings: 1. Guide roller; 2. Mounting part; 3. Knife seat; 4. Cutter; 5. Arc groove; 6. Slide hole; 7. Slide rail; 8. Slider; 9. Screw; 10. Adjusting nut; 11. Driving member; 12. Rotating rod; 13. Chip suction hole; 14. Chip extraction assembly; 141. Conduit; 142. Exhaust fan; 143. Collection box; 15. Give way groove; 16. Positioning strip; 17. Positioning groove; 18. Elastic spacer; 19. Fastening bolt; 20. Adjusting bolt; 21. Frame. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-5 This application is described in further detail.

[0038] Example 1

[0039] The present application embodiment discloses a cutting assembly. Figure 1 and Figure 2 The slitting assembly includes a guide roller 1, a mounting portion 2, a plurality of knife seats 3 and a plurality of cutters 4, and the number of the cutters 4 is the same as that of the knife seats 3.

[0040] The guide roller 1 is rotatably mounted on one side of the mounting portion 2. The processed product is wound around the outside of the guide roller 1. In this embodiment, the processed product is primarily a plastic film. In other embodiments, the cut product may also be other flexibly deformable materials. The mounting portion 2 is located on the horizontal side of the guide roller 1. An arcuate groove 5 is provided on the side of the mounting portion 2 facing the guide roller 1. The arcuate opening of the arcuate groove 5 faces the longitudinal direction of the guide roller 1. A gap exists between the bottom of the arcuate groove 5 and the outside of the guide roller 1. The upper long side of the arcuate groove 5 is located above the axis of the guide roller 1, and the lower long side of the arcuate groove 5 is located below the axis of the guide roller 1, thereby covering nearly half of the outer circumference of the guide roller 1.

[0041] Reference Figure 2 and Figure 3 The mounting portion 2 is provided with a plurality of sliding holes 6, arranged along the length of the guide roller 1. The sliding holes 6 communicate with the arcuate groove 5 and are spaced apart circumferentially around the arcuate groove 5. In this embodiment, three sliding holes 6 are spaced apart circumferentially around the arcuate groove 5. The tool holder 3 is slideably mounted on the mounting portion 2. The tool holder 3 is in the form of an elongated rectangular block, with both ends extending out of the sliding holes 6. The tool holder 3 slides and adjusts along the length of the sliding holes 6. Each sliding hole 6 is provided with at least one tool holder 3. In this embodiment, three tool holders 3 are provided on each sliding hole 6; one end of the tool holder 3 is located toward the notch of the arcuate groove 5.

[0042] The cutter 4 is locked to the end of the knife holder 3 located in the arc groove 5 and facing the guide roller 1, and the cutter 4 is sheet-shaped; the cutting part of the cutter 4 abuts against the outer side of the guide roller 1 facing the arc groove 5 to cut the product wound around the outer side of the guide roller 1; the end of the cutter 4 away from the guide roller 1 is inserted into the groove on the end face of the knife holder 3, and a fastening bolt 19 for pressing the cutter 4 is threadedly connected to the horizontal side of the knife holder 3 to realize the detachable fixation of the cutter 4 and the knife holder 3.

[0043] In some embodiments, the side of the mounting portion 2 away from the guide roller 1 is the outer side. A slide rail 7 is fixed to the outer side of the mounting portion 2 and on the side of the slide hole 6. The slide rail 7 is arranged along the length of the slide hole 6. Three sliders 8 are connected to the slide rail 7 for sliding adjustment. One side of the slider 8 extends to a position opposite to the slide hole 6. A screw rod 9 is fixed to the end of the knife holder 3 away from the guide roller 1. The screw rod 9 passes through the slider 8. Two adjustment nuts 10 are threadedly connected to the screw rod 9 and are tightened on opposite sides of the slider 8 to achieve fixation between the knife holder 3 and the slider 8, and to adjust the distance between the cutter 4 and the outer side of the guide roller 1. An adjustment bolt 20 is threadedly connected to the outer side of the slider 8 and abuts the surface of the guide rail. After the slider 8 is adjusted to the correct position, the adjustment bolt 20 is tightened to adjust the position of the knife holder 3 and the slider 8.

[0044] When the width of the product to be cut is relatively small, the cutter 4 on one of the slide holes 6 can be brought closer to the cutter 4 on the other slide hole 6. Since the cutters 4 on different slide holes 6 will not be affected by the interference of the knife holder 3, even when the knife holder 3 slides, the cutters 4 on different slide holes 6 can slide to a position where they fit together, so it is suitable for cutting products with smaller widths at one time. Compared with the existing technology, the existing knife holder 3 is basically adjusted by sliding on the same straight rod. Due to the influence of the knife holder 3 on the same adjustment line, there will be a gap between adjacent cutters 4, and they cannot be fully adjusted to a position of fitting together, resulting in the inability to cut a width smaller than the gap between two cutters 4 at one time.

[0045] A scale (position in the figure) is provided on the outside of the mounting portion 2 and on one side of the length direction of each slide rail 7. The scale can be formed by gluing a scale strip to the outside of the mounting portion 2, which is convenient for quickly judging the position of the knife holder 3 and then judging the interval between two adjacent cutters 4.

[0046] In some embodiments, the mounting portion 2 slides and adjusts in a horizontal direction close to or away from the guide roller 1, and a driving member 11 is provided on the outside of the mounting portion 2 for driving the sliding adjustment of the mounting portion 2. In this embodiment, the driving member 11 is selected as a cylinder, which is convenient for driving each cutter 4 to move synchronously at the same time, so that the cutter 4 can abut against or leave the outside of the guide roller 1 as much as possible, which is convenient for replacing the cutter 4; when the mounting portion 2 is in working condition, that is, when each cutter 4 is cutting, the axis of the arc groove 5 and the axis of the guide roller 1 are located in the same straight line.

[0047] In some embodiments, the parts where each cutter 4 contacts and cuts the product are close to the same straight line, and the straight line is parallel to the axial direction of the guide roller 1; although each knife holder 3 is located at different positions outside the mounting portion 2, the parts where the cutters 4 cut the product are close to the same straight line, so that the parts where each cutter 4 cuts the product are close to the same width of the product, reducing the error caused by misaligned cutting and improving cutting accuracy.

[0048] A rotating rod 12 is rotatably mounted on the mounting portion 2 at the upper end of the bottom of the arcuate groove 5. The rotating rod 12 is parallel to the guide roller 1. Both ends of the rotating rod 12 are rotatably connected to the mounting portion 2 via hinged seats. Clamping nuts are threadedly connected to both ends of the rotating rod 12 to position the rotating rod 12. A plurality of elastic spacers 18 are sleeved on the rotating rod 12. The elastic spacers 18 are made of an elastic rubber material with a certain degree of elastic deformation. The elastic spacers 18 are rotatably adjusted around the outer circumference of the rotating rod 12 and can be adjusted along the length of the rotating rod 12. The elastic spacers 18 can be tightened against the rotating rod 12 by interference fit to achieve position adjustment. The ends of the elastic spacers 18 away from the rotating rod 12 are located on both sides of the cutter 4, and the lower sides of the elastic spacers 18 overlap the outer side of the guide roller 1 and are close to the position where the cutter 4 contacts the product.

[0049] When the elastic spacer 18 rotates upward, the elastic spacer 18 can leave the moving path of the knife holder 3 and the cutter 4, or the elastic spacer 18 can leave the moving path of the knife holder 3 and the cutter 4 by elastic deformation, ensuring that the elastic spacer 18 enters between the two cutters 4; moreover, when the elastic spacer 18 overlaps on both sides of the cutter 4, it can press on both sides of the product cutting position, and the product is not easy to slide, thereby improving the stability of the product during cutting and improving the cutting accuracy; in addition, when the position of the cutter 4 is adjusted, the elastic spacer 18 can play a blocking role, reducing the direct collision between the two adjacent cutters 4 and reducing damage to the cutter 4.

[0050] In some embodiments, the mounting portion 2 is in the form of a hollow shell with an arc shape. The mounting portion 2 is provided with a plurality of chip suction holes 13 at the bottom of the arc-shaped slot 5. The chip suction holes 13 are connected to the interior of the mounting portion 2. A chip extraction assembly 14 is provided on the outside of the mounting portion 2 and is also connected to the interior of the mounting portion 2. The mounting portion 2 can cover one side of the product cutting position to limit the escape of debris generated by cutting, while the chip extraction assembly 14 can draw the debris from the chip suction holes 13 into the mounting portion 2, thereby comprehensively collecting debris generated by multiple cutting positions at the same time.

[0051] Reference Figure 1 As shown in Figure 3, the chip extraction assembly 14 includes a duct 141, an exhaust fan 142 and a collection box 143. One end of the duct 141 is connected to the bottom position of the mounting portion 2, the air inlet of the exhaust fan 142 is connected to the other end of the duct 141, and the collection box 143 is installed at the air outlet of the exhaust fan 142; the exhaust fan 142 forms a negative pressure in the mounting portion 2, so that the debris can be sucked into the mounting portion 2 from the chip suction hole 13, and then enter the collection box 143 from the duct 141.

[0052] In some embodiments, a plurality of clearance grooves 15 are provided on the outer side of the guide roller 1 at intervals along its own axial direction, and the clearance grooves 15 are arranged circumferentially around the guide roller 1; when the cutter 4 is in the cutting position, the cutting part of the cutter 4 can extend into the clearance groove 15, so that the cutter 4 can avoid contact with the outer side of the guide roller 1 when cutting the product, thereby reducing the wear of the cutter 4.

[0053] Reference Figure 4 In some embodiments, a through hole is provided on the slider 8, a positioning strip 16 is provided on the inner wall of the through hole along its own axial direction, a positioning groove 17 is provided on the outer side of the screw 9 along its own axial direction, the screw 9 is inserted into the through hole, and the positioning strip 16 and the positioning groove 17 are slidably matched; through the cooperation of the positioning groove 17 and the positioning strip 16, the screw 9 can be positioned at the circumferential position of the through hole to ensure the installation angle of the cutter 4.

[0054] The implementation principle of a slitting component in an embodiment of the present application is as follows: when cutting, the film product is passed around the guide roller 1, and the mounting portion 2 is moved toward the outside of the guide roller 1 by the driving member 11, and then the position of the knife seat 3 is adjusted, and the position of the knife seat 3 on another slide hole 6 is adjusted, and then the cutting is carried out by the cutter 4 on the different slide holes 6; since the knife seats 3 are located on different slide holes 6, the adjustment of the knife seats 3 on adjacent slide holes 6 will not affect each other, thereby avoiding the interference caused by the knife seats 3, and multiple narrower products can be cut out at one time, which is convenient for adapting to the needs of product slitting with a smaller width and improving the slitting efficiency.

[0055] Example 2

[0056] The present application also discloses a film slitting machine. Figure 5 The film slitting machine includes a frame 21 and a slitting assembly arranged on the frame 21 , the guide roller 1 is rotatably mounted on the frame 21 , and the driving member 11 is fixedly mounted on the frame 21 .

[0057] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A slitting assembly, characterized in that: include: A guide roller (1), the processed product is wound around the outside of the guide roller (1); A mounting portion (2), wherein an arcuate groove (5) is provided on a side of the mounting portion (2) facing the guide roller (1), a gap is formed between the bottom of the arcuate groove (5) and the outer side of the guide roller (1), a plurality of sliding holes (6) are provided on the mounting portion (2), the sliding holes (6) are connected to the arcuate groove (5), the sliding holes (6) are arranged along the length direction of the guide roller (1), and the sliding holes (6) are arranged at intervals in the circumferential direction around the arcuate groove (5); A plurality of knife seats (3), wherein the knife seats (3) are slidingly adjusted and arranged on the mounting portion (2), the knife seats (3) are slidingly adjusted along the length direction of the sliding hole (6), one end of the knife seat (3) is located in the notch direction of the arc groove (5), and a cutting knife (4) is arranged at one end of each knife seat (3) facing the guide roller (1); A slide rail (7) is fixed on the outside of the mounting portion (2) and on one side of the slide hole (6); a slider (8) is connected to the slide rail (7) for sliding adjustment; one end of the knife seat (3) passes through the slide hole (6) and the slider (8); a screw rod (9) is provided at the end of the knife seat (3) away from the guide roller (1); the screw rod (9) passes through the slider (8); and an adjusting nut (10) is threadedly connected to the screw rod (9) and pressed against opposite sides of the slider (8); The parts where the cutters (4) contact and cut the product are close to the same straight line, and the straight line is parallel to the axis direction of the guide roller (1); The mounting portion (2) is provided with a rotating rod (12) at the upper end position of the bottom of the arc groove (5), the rotating rod (12) is parallel to the guide roller (1), and a plurality of elastic spacers (18) are sleeved on the rotating rod (12), and the elastic spacers (18) are rotated and adjusted around the outer peripheral side of the rotating rod (12). The ends of the elastic spacers (18) away from the rotating rod (12) are located on both sides of the cutter (4), and the lower side of the elastic spacers (18) overlaps the outer side of the guide roller (1) and is close to the position where the cutter (4) contacts the product; when the elastic spacers (18) rotate upward, the elastic spacers (18) leave the moving path of the knife seat (3) and the cutter (4).

2. A slitting assembly according to claim 1, characterized in that: The mounting portion (2) is provided with a scale on one side of the slide rail (7) in the length direction.

3. A slitting assembly according to claim 1, characterized in that: The mounting portion (2) is slidably adjusted in a direction approaching or moving away from the guide roller (1), and further comprises a driving member (11) for driving the mounting portion (2) to slidably adjust; when the mounting portion (2) is in a working state, the axis of the arc groove (5) and the axis of the guide roller (1) are located in the same straight line.

4. A slitting assembly according to claim 1, characterized in that: A plurality of clearance grooves (15) are arranged at intervals on the outer side of the guide roller (1) along its own axial direction, and the clearance grooves (15) are arranged around the circumference of the guide roller (1).

5. A slitting assembly according to claim 1, characterized in that: The mounting portion (2) is in the shape of a shell with a hollow interior. The mounting portion (2) is provided with a plurality of chip suction holes (13) at the bottom of the arc-shaped groove (5). The chip suction holes (13) are in communication with the interior of the mounting portion (2). A chip extraction assembly (14) in communication with the interior of the mounting portion (2) is provided on the outside of the mounting portion (2).

6. A slitting assembly according to claim 1, characterized in that: The slider (8) is provided with a through hole, the inner wall of the through hole is provided with a positioning strip (16) along its own axial direction, the outer side of the screw rod (9) is provided with a positioning groove (17) along its own axial direction, the screw rod (9) is inserted into the through hole, and the positioning strip (16) and the positioning groove (17) are slidably matched.

7. A film slitting machine, characterized in that: The invention comprises the slitting assembly described in any one of claims 1 to 6.

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