A quick release device for a slitting blade

Abstract

The utility model discloses a kind of quick release devices of slitting cutter, belong to slitting technical field, including two pedestals, two the pedestal between being provided with support roll through fixed assembly, the support roll is slidably installed with several annular bottom knives, the support roll is equipped with the spacer block mechanism of adjusting several annular bottom knives spacing, the spacer block mechanism has detachable first part and second part, the support roll is equipped with the fastening assembly of annular bottom knife limiting, when the fastening assembly removes the limiting of annular bottom knife, the first part and second part of spacer block mechanism can be split or combined along support roll axial direction, after releasing limiting, spacer block mechanism can be combined installation and disassembly along support roll axial direction in certain space, to adjust the position of bottom knife, without all spacer block and tool dismounting, adjust in turn, save time and effort, improve efficiency.

Description

Technical Field

[0001] This utility model relates to a quick-release device for a slitting knife, belonging to the field of slitting technology. Background Technology

[0002] Composite current collectors are important materials inside novel lithium batteries. During the preparation process, a slitting machine is needed to slit the current collector film to cut the composite current collector into different widths.

[0003] The core cutting unit of a conventional composite current collector slitting machine consists of a "slitting circular blade + annular bottom blade," with clearly defined functions: The slitting circular blade actively rotates and applies cutting force to directly cut the current collector roll film, acting as the "moving blade" in the slitting process. Its position and rotation speed determine the cutting trajectory. The annular bottom blade is fixedly mounted on the support roller, corresponding to the slitting circular blade vertically, acting as a "fixed blade / anvil." It is fixed and does not rotate, and its core functions include three points: first, providing a reaction force for the slitting circular blade to ensure thorough cutting; second, supporting the current collector substrate to prevent deformation during cutting; and third, controlling the cutting depth to prevent damage to the underlying structure of the substrate.

[0004] The existing technology has significant drawbacks in the installation and limiting methods of the annular bottom cutter:

[0005] Installation structure fixation: The annular bottom cutter is fixed by "support roller + annular pad + end fasteners" - the annular bottom cutter is sleeved on the support roller, and adjacent annular bottom cutters are filled and limited by an integrated annular pad. The two ends of the support roller are then locked with fasteners such as nuts and clamps, clamping the annular bottom cutter and the pad as a whole. However, when it is necessary to cut current collectors of different widths, the fasteners at both ends of the support roller must be removed first, and the support roller must be removed from the equipment base as a whole; then the annular bottom cutters and annular pads on the support roller must be removed one by one, and the positions of the bottom cutters and pads must be rearranged according to the new width requirements; then the support roller is installed back on the base and locked, which is time-consuming, labor-intensive and inefficient. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a quick-release device for slitting blades.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A quick-release slitting knife device includes two bases, with a support roller between the two bases via a fixing assembly. A plurality of annular bottom blades are slidably mounted on the support roller. The support roller is equipped with a pad mechanism for adjusting the spacing between the annular bottom blades. The pad mechanism has a detachable first part and a second part. The support roller is equipped with a fastening assembly that limits the position of the annular bottom blades. When the fastening assembly releases the limit on the annular bottom blades, the first and second parts of the pad mechanism can be disassembled or combined along the axial direction of the support roller. After the limit is released, the pad mechanism can be assembled and disassembled within a certain space along the axial direction of the support roller, thereby adjusting the position of the annular bottom blades. This eliminates the need to disassemble all the pad mechanisms and blades for sequential adjustment, reducing the problem of readjustment after position adjustment errors, saving time and effort, and improving efficiency.

[0009] Preferably, the fixing component includes an electric cylinder, which is installed on one side of the base. A cross block is installed at the output end of the electric cylinder. Cross slots are opened on both sides of the support roller to engage with the cross block. The electric cylinder drives precisely, and the engagement of the cross block with the cross slot can quickly complete the assembly and disassembly of the support roller (without complicated tools), avoiding slippage or tilting of the support roller during slitting, thus balancing convenience and stability.

[0010] Preferably, the first part includes a lower pad block, and the second part includes an upper pad block. An upper pad block is provided above the lower pad block, and two connecting holes are opened below the upper pad block. Two connecting columns can be detachably installed above the lower pad block through a disassembly assembly. The connecting columns and connecting holes are slidably connected. The split upper and lower pad block design can be separated without removing the support roller, making it convenient to add or remove pad blocks to adjust the spacing of the annular bottom knife. Compared with the "complete disassembly and reassembly" method of the integrated pad block, it greatly saves operation time.

[0011] Preferably, the disassembly assembly includes two insertion holes that are slidably connected to the connecting post. The two insertion holes are respectively opened at both ends of one side of the lower pad. A through hole is opened on one side of the connecting post, and square grooves are opened at both ends of one side of the lower pad. A sliding plate is slidably installed in the square groove, and an insertion rod is installed on the top of the sliding plate. A sliding hole communicating with the square groove and the insertion hole is opened in the lower pad. The insertion rod is slidably connected to the through hole and the sliding hole. The bottom of the sliding plate and the bottom of the square groove are connected by a spring. The spring can automatically reset the insertion rod to fix the connecting post. No additional tools are required to disassemble and assemble the connecting post (only pressing the sliding plate is needed), and the operation is simple. Moreover, the connecting post can be replaced individually, avoiding the scrapping of the entire pad and reducing maintenance costs.

[0012] Preferably, a guide rod is installed between the upper and lower ends of the square groove. The guide rod is slidably connected to the slide plate, which restricts the slide plate to slide only in the up and down direction, prevents the slide plate from shifting when pressed, ensures that the insertion rod is accurately aligned with the through hole of the connecting post, improves the reliability of the connecting post fixing, and extends the service life of the slide plate.

[0013] Preferably, a circular groove is provided on one side of the skateboard, which facilitates the insertion of fingers or thin tools to apply force, solving the problem that the smooth side of the skateboard is difficult to press, and improving the ease of assembling and disassembling the connecting column.

[0014] Preferably, the fastening assembly includes two external threads, which are respectively formed on the outer side walls of the support roller. Threaded rings are rotatably installed on both sides of the support roller via the external threads. The threaded rings can quickly clamp / release the annular bottom knife and the pad by rotating, making the operation simple and efficient, without the need to disassemble complex fasteners such as nuts and clamps.

[0015] Preferably, the surface of the threaded ring is provided with a cotton layer to increase the friction between the hand and the threaded ring (to prevent slippage), while also buffering the collision between the threaded ring and the component, avoiding metal wear, and reducing the noise generated by the cutting vibration.

[0016] Preferably, limit strips are installed at the top and bottom of the support roller between the two external threads. The top and bottom inner walls of the annular bottom knife, the bottom inner wall of the lower pad, and the top inner wall of the upper pad are all provided with limit grooves that slide in connection with the limit strips. This strictly limits the circumferential rotation of the annular bottom knife and the pad, ensuring that the blade of the annular bottom knife is always aligned with the cutting trajectory and avoiding cutting deviation. It does not affect the sliding of the components along the axial direction of the support roller, taking into account both accuracy and adjustment flexibility, and can also play a positioning and guiding role in the combined installation of the upper and lower pads.

[0017] Preferably, one end of the support roller has a scale line on its outer side wall, so that there is no need to carry additional measuring tools. The spacing of the annular bottom knife can be adjusted accurately according to the scale line, reducing measurement errors and speeding up the switching speed of different width slitting tasks.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The lower pad block is formed by inserting the connecting post into the connecting hole of the upper pad block to create an "annular pad block". When the tool position needs to be adjusted, first rotate the threaded rings on both sides of the support roller to disengage from the support roller, so that the "annular pad block" composed of the lower and upper pad blocks and the annular bottom cutter can move within a certain distance. At this time, separate the lower and upper pad blocks, remove part of the "annular pad block", move the annular bottom cutter to the appropriate position, and then install the "annular pad block" to the remaining position. Then rotate and tighten the threaded rings on both sides to complete the adjustment operation. There is no need to remove the support roller and then adjust the tool position, and there is no need to remove all the pad blocks and tools and adjust them one by one. This reduces the problem of readjustment after position adjustment error, saves time and effort, and improves efficiency.

[0020] 2. The connecting post on the lower pad is installed through the insertion hole. The insertion rod passes through the sliding hole and engages with the through hole of the connecting post to fix the connecting post. When the connecting post wears or breaks due to long-term use, simply insert your finger into the circular groove of the sliding plate and press down on the sliding plate. This compresses the spring and simultaneously causes the insertion rod to disengage from the through hole, allowing you to remove the damaged connecting post. After inserting a new connecting post, release the sliding plate. The spring will return to its original position and push the insertion rod back into the through hole to complete the fixation. Compared to one-piece injection molding or welding, where the entire pad needs to be replaced after the connecting post is damaged, the connecting post of this device can be replaced individually. This reduces the maintenance cost of a single pad mechanism and can significantly reduce equipment consumable expenditures in the long run. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the fixing component structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the pad block mechanism of this utility model;

[0025] Figure 4 This is a schematic diagram of the disassembly component structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the disassembly component structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0028] In the diagram: 1. Base; 2. Fixing component; 3. Support roller; 4. Annular bottom knife; 5. Pad block mechanism; 6. Fastening component; 201. Electric cylinder; 202. Cross block; 203. Cross groove; 501. Lower pad block; 502. Upper pad block; 503. Connecting hole; 504. Disassembly component; 505. Connecting column; 5041. Insertion hole; 5042. Through hole; 5043. Square groove; 5044. Slide plate; 5045. Insert rod; 5046. Sliding hole; 5047. Spring; 5048. Guide rod; 5049. Circular groove; 601. External thread; 602. Threaded ring; 603. Limiting strip; 604. Limiting groove; 605. Scale line. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1 This utility model provides an embodiment:

[0031] A quick-release device for a slitting blade includes two bases 1, with a support roller 3 positioned between the two bases 1 via a fixing assembly 2. Several annular bottom blades 4 are slidably mounted on the support roller 3. The support roller 3 is equipped with multiple pad mechanisms 5 for adjusting the spacing between the annular bottom blades 4. Each pad mechanism 5 has a detachable first part and a second part. The support roller 3 is equipped with a fastening assembly 6 that limits the position of the annular bottom blades 4. When the fastening assembly 6 releases the limit on the annular bottom blades 4, an operating space is formed around the pad mechanism 5. The first and second parts of the pad mechanism 5 can be separated along the axial direction of the support roller 3 to detach from the support roller 3, or the first and second parts of the pad mechanism 5 can be combined and installed to fit the pad mechanism 5 onto the support roller 3. This facilitates the adjustment of the position of the annular bottom blades 4 without having to remove all the pad mechanisms 5 and blades for sequential adjustment, reducing the need for readjustment after incorrect positioning, saving time and effort, and improving efficiency.

[0032] Furthermore, the two bases 1 are symmetrically arranged to provide stable support for the entire device, ensuring that the support roller 3 does not shake during the slitting operation; the number of annular bottom blades 4 can be flexibly increased or decreased according to the actual slitting width requirements to adapt to different specifications of composite current collector slitting tasks, and the blades of the annular bottom blades 4 are made of high-strength wear-resistant material to extend their service life.

[0033] Please see Figure 2 In this embodiment: the fixing component 2 includes an electric cylinder 201, which is installed on one side of the base 1. A cross block 202 is installed at the output end of the electric cylinder 201, and cross grooves 203 that are inserted into the cross block 202 are provided on both sides of the support roller 3.

[0034] Furthermore, the electric cylinder 201 adopts a model that can precisely control the stroke, ensuring that the insertion depth of the cross block 202 and the cross groove 203 is consistent, and preventing the support roller 3 from tilting due to uneven force on both sides; the fit gap between the cross block 202 and the cross groove 203 is extremely small, preventing slippage during cutting, and at the same time facilitating the quick assembly and disassembly of the support roller 3 without the need for complicated tools.

[0035] Please see Figure 3In this embodiment: the pad mechanism 5 has a detachable first part and a second part. The first part includes a lower pad 501, and the second part includes an upper pad 502. The upper pad 502 is provided above the lower pad 501. Two connecting holes 503 are opened below the upper pad 502. Two connecting posts 505 are detachably installed above the lower pad 501 through a disassembly assembly 504. The connecting posts 505 and the connecting holes 503 are slidably connected.

[0036] Furthermore, the lower pad 501 has protrusions on one side of the top and the other side of the bottom. After the lower pad 501 and the upper pad 502 are spliced ​​together, they form a complete ring structure. The inner diameter of the lower pad 501 matches the outer diameter of the support roller 3 to ensure a tight fit without shaking. The length of the connecting column 505 is consistent with the depth of the connecting hole 503 to ensure that the surface of the upper and lower pads is flat after splicing, avoiding gaps in the support of the annular bottom knife 4, thereby preventing slight displacement of the annular bottom knife 4 during slitting and affecting the cutting accuracy.

[0037] Please see Figure 4-5 In this embodiment: the disassembly assembly 504 includes two insertion holes 5041 that are slidably connected to the connecting post 505. The two insertion holes 5041 are respectively opened at both ends of one side of the lower pad 501. A through hole 5042 is opened on one side of the connecting post 505. A square groove 5043 is opened at both ends of one side of the lower pad 501. A sliding plate 5044 is slidably installed in the square groove 5043. An insertion rod 5045 is installed on the top of the sliding plate 5044. A sliding hole 5046 is opened in the lower pad 501 that communicates with the square groove 5043 and the insertion hole 5041. The insertion rod 5045 is slidably connected to the through hole 5042 and the sliding hole 5046. The bottom of the sliding plate 5044 and the bottom of the square groove 5043 are connected by a spring 5047.

[0038] Furthermore, the spring 5047 is a compression spring with a certain preload. In its natural state, it can push the slide plate 5044 upward, so that the insertion rod 5045 can be stably inserted into the through hole 5042, firmly fixing the connecting post 505 and preventing the connecting post 505 from loosening due to cutting vibration. The inner wall of the sliding hole 5046 is smoothed to reduce the frictional resistance when the insertion rod 5045 slides, avoid affecting the disassembly and assembly efficiency of the connecting post 505 due to jamming, and protect the surface of the insertion rod 5045 from being scratched.

[0039] Please see Figure 5 In this embodiment: a guide rod 5048 is installed between the upper and lower ends of the square groove 5043, and the guide rod 5048 and the slide plate 5044 are slidably connected.

[0040] Furthermore, the clearance between the guide rod 5048 and the slide plate 5044 is strictly controlled to ensure that the slide plate 5044 can only move along the axial direction (up and down) of the guide rod 5048, thus preventing the slide plate 5044 from shifting laterally during the pressing process, which would cause the insertion rod 5045 to fail to accurately align with the through hole 5042. At the same time, the guide rod 5048 can share the lateral force on the slide plate 5044, preventing the slide plate 5044 from deforming after long-term use and extending the overall service life of the disassembly assembly 504.

[0041] Please see Figure 5 In this embodiment: a circular groove 5049 is provided on one side of the sliding plate 5044.

[0042] Furthermore, the diameter of the circular groove 5049 is adapted to the size of an adult's fingertip, making it convenient for operators to insert their fingers and apply downward pressure, thus solving the problem that the smooth sides of the skateboard 5044 make it difficult to apply force.

[0043] Please see Figure 2 In this embodiment: the fastening assembly 6 includes two external threads 601, which are respectively opened on the outer side walls of the support roller 3. Threaded rings 602 are rotatably installed on both sides of the support roller 3 through the external threads 601.

[0044] Furthermore, the pitch design of the external thread 601 is reasonable, which not only ensures that the threaded ring 602 can move quickly along the axial direction of the support roller 3 when rotating, improving the clamping / unlocking efficiency, but also has good self-locking performance. Even if the continuous vibration generated during the slitting operation occurs, the threaded ring 602 will not loosen on its own. The outer diameter of the threaded ring 602 is larger than the outer diameter of the support roller 3, and the edge is rounded to prevent the operator from being scratched when rotating.

[0045] Please see Figure 2 In this embodiment: the surface of the threaded ring 602 is provided with a cotton layer.

[0046] Furthermore, the cotton layer is made of wear-resistant and pill-resistant cotton and linen material, which can increase the friction between the hand and the threaded ring 602, prevent the operator's hands from slipping when they are sweaty or oily, and ensure that the rotation force is controllable.

[0047] Please see Figure 2 In this embodiment: the top and bottom of the support roller 3 are both equipped with limit strips 603 between the two external threads 601, and the top inner wall and bottom inner wall of the annular bottom knife 4, the bottom inner wall of the lower pad 501, and the top inner wall of the upper pad 502 are all provided with limit grooves 604 that are slidably connected to the limit strips 603.

[0048] Furthermore, the limiting strip 603 and the support roller 3 are integrally molded to ensure structural strength and prevent the limiting strip 603 from falling off due to long-term sliding. The width of the limiting groove 604 matches the thickness of the limiting strip 603, which can ensure that each component slides smoothly along the axial direction of the support roller 3, and strictly limit its circumferential rotation. This ensures that the blade of the annular bottom knife 4 is always aligned with the cutting trajectory of the slitting circular knife, avoids the slitting position deviation, improves the slitting accuracy of the composite current collector, and can also play a positioning and guiding role in the combined installation of the upper pad 502 and the lower pad 501.

[0049] Please see Figure 2 In this embodiment: a scale line 605 is provided on the outer wall of one end of the support roller 3.

[0050] Furthermore, the scale line 605 is made using laser engraving technology, which provides high clarity and wear resistance, and is not easily worn or blurred over long-term use. Operators do not need to carry additional measuring tools; they can directly adjust the spacing of the annular bottom blade 4 according to the scale line 605, reducing measurement errors and accelerating the switching speed between different specification cutting tasks, thereby improving production efficiency.

[0051] Please see Figure 6 The present invention provides embodiment 2: the fixing component 2 may also include a slot, the side wall of the support roller 3 is provided with a slot for insertion into the output end of the electric cylinder 201, and both the top of the slot and the top of the output end of the electric cylinder 201 are provided with screw holes, and the two screw holes are fixed together by bolts.

[0052] The workflow of this embodiment is as follows: The connecting post 505 on the lower pad 501 is inserted into the connecting hole 503 at the bottom of the upper pad 502. The lower pad 501 and the upper pad 502 are combined to form a complete "ring pad" and are slidably connected to the support roller 3. The ring pad is fitted onto the support roller 3 for limiting the movement between the ring bottom knife 4 and the ring bottom knife 4. The threaded ring 602 is rotatably installed on the external thread 601. The two threaded rings 602 press several "ring pads" and the ring bottom knife 4 together to ensure the stability of the ring bottom knife 4. The limiting strip 603 slides in the limiting groove 604 to prevent the "ring pads" and the ring bottom knife 4 from rotating. In cases where it is necessary to adjust the distance between the annular bottom cutter 4 and the annular bottom cutter 4, rotate the threaded ring 602 in the opposite direction to release the restriction on the "annular pad" and the annular bottom cutter 4. Move the upper pad 502 horizontally to separate the upper pad 502 and the lower pad 501. After separation, the upper pad 502 can be removed upwards and the lower pad 501 can be removed downwards. After removing part of the "annular pad", move the position of the annular bottom cutter 4 on the support roller 3. The distance between the annular bottom cutter 4 and the annular bottom cutter 4 can be easily observed through the scale line 605. After the position of the annular bottom cutter 4 is adjusted, fill the gap with the lower pad 501 and the upper pad 502. In areas with gaps, the threaded ring 602 is then rotated to lock, thus adjusting the spacing of the annular bottom knife 4. The "annular pad" is a separate design with lower pad 501 and upper pad 502, allowing adjustment of the annular bottom knife 4 position without removing the support roller 3. Compared to an integrated pad, which requires removing both the annular bottom knife 4 and the pad, then re-attaching and locking according to the width, this design improves efficiency. When maintenance of the annular bottom knife 4 is needed, the electric cylinder 201 moves the cross block 202 away from the cross groove 203, allowing the support roller 3 to be removed, and then the annular bottom knife 4 to be removed, facilitating maintenance. With long-term use... The connecting post 505 on the pad 501 may be damaged. A finger can be inserted into the circular groove 5049 and the sliding plate 5044 can be pressed down. This will compress the spring 5047 and cause the insertion rod 5045 to leave the through hole 5042, thus removing the damaged connecting post 505. Then, a new connecting post 505 can be inserted. Releasing the sliding plate 5044 will allow the restoring force of 5057 to push the insertion rod 5045 upward into the through hole 5042, thus fixing the connecting post 505 in the insertion hole 5041 and completing the replacement of the connecting post 505. Compared to the fixed installation of the connecting post 505 and the lower pad 501, which requires replacing the entire unit, this method reduces the replacement cost.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-release device for a slitting blade, characterized in that, It includes two bases (1), and a support roller (3) is provided between the two bases (1) through a fixing component (2). Several annular bottom blades (4) are slidably mounted on the support roller (3). The support roller (3) is provided with multiple pad block mechanisms (5) for adjusting the spacing of the several annular bottom blades (4). The pad block mechanism (5) has a detachable first part and a second part. The support roller (3) is provided with a fastening component (6) for limiting the annular bottom blades (4). When the fastening component (6) releases the limitation on the annular bottom blades (4), the first part and the second part of the pad block mechanism (5) can be separated or combined along the axial direction of the support roller (3).

2. The quick-release device for a slitting blade according to claim 1, characterized in that, The fixing component (2) includes an electric cylinder (201), which is installed on one side of the base (1). A cross block (202) is installed at the output end of the electric cylinder (201), and cross grooves (203) that are inserted into the cross block (202) are provided on both sides of the support roller (3).

3. The quick-release device for a slitting blade according to claim 1, characterized in that, The first part includes a lower pad (501), and the second part includes an upper pad (502). The upper pad (502) is provided above the lower pad (501). Two connecting holes (503) are opened below the upper pad (502). Two connecting posts (505) are detachably installed above the lower pad (501) through a disassembly assembly (504). The connecting posts (505) and the connecting holes (503) are slidably connected.

4. The quick-release device for a slitting blade according to claim 3, characterized in that, The disassembly assembly (504) includes two insertion holes (5041) that are slidably connected to the connecting post (505). The two insertion holes (5041) are respectively opened at both ends of one side of the lower pad (501). A through hole (5042) is opened on one side of the connecting post (505). Square grooves (5043) are opened at both ends of one side of the lower pad (501). A sliding plate (5044) is slidably installed in the square groove (5043). An insertion rod (5045) is installed on the top of the sliding plate (5044). A sliding hole (5046) communicating with the square groove (5043) and the insertion hole (5041) is opened in the lower pad (501). The insertion rod (5045) is slidably connected to the through hole (5042) and the sliding hole (5046). The bottom of the sliding plate (5044) and the bottom of the square groove (5043) are connected by a spring (5047).

5. The quick-release device for a slitting blade according to claim 4, characterized in that, A guide rod (5048) is installed between the upper and lower ends of the square groove (5043), and the guide rod (5048) and the slide plate (5044) are slidably connected.

6. The quick-release device for a slitting blade according to claim 4, characterized in that, A circular groove (5049) is provided on one side of the sliding plate (5044).

7. The quick-release device for a slitting blade according to claim 1, characterized in that, The fastening assembly (6) includes two external threads (601), which are respectively opened on the outer side walls of the support roller (3). Threaded rings (602) are rotatably installed on both sides of the support roller (3) through the external threads (601).

8. A quick-release device for a slitting blade according to claim 7, characterized in that, The surface of the threaded ring (602) is provided with a cotton layer.

9. A quick-release device for a slitting blade according to claim 7, characterized in that: Limiting strips (603) are installed at the top and bottom of the support roller (3) between the two external threads (601). Limiting grooves (604) that slide in connection with the limiting strips (603) are provided on the top inner wall and bottom inner wall of the annular bottom knife (4), the bottom inner wall of the lower pad (501), and the top inner wall of the upper pad (502).

10. A quick-release device for a slitting blade according to claim 7, characterized in that, The outer wall of one end of the support roller (3) is provided with a scale line (605).

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