A printing and dyeing fabric slitting and winding device

Abstract

The application relates to the technical field of fabric slitting, and discloses a printing and dyeing fabric slitting and winding device, which comprises a rack, a winding-off roller, a cloth guide roller, a slitting roller, a slitting blade, an air inflation shaft, a paper tube and a driving motor; a compression roller for compressing the end of the fabric on the paper tube is detachably connected to the air inflation shaft; a long slot parallel to the extension direction of the compression roller is arranged in the compression roller; a tool holder is slidably connected in the long slot; and a shearing cutter for shearing the fabric is arranged in the tool holder. When the end of the fabric needs to be fixed on the paper tube of the air inflation shaft, the air inflation shaft is first inflated, and the outer layer of the air inflation shaft is expanded to achieve the center locking of the paper tube; then the double-sided adhesive tape is bonded on the outer wall of the paper tube, and the end of the fabric is bonded on the double-sided adhesive tape; then the end of the fabric is compressed on the paper tube by the compression roller; the tool holder moves along the long slot, the shearing cutter in the tool holder shears the end of the fabric after passing the outer wall of the paper tube, and the end of the fabric obtained by slitting can be sheared and flattened.

Description

Technical Field

[0001] This invention relates to the field of fabric slitting technology, and in particular to a slitting and winding device for printed and dyed fabrics. Background Technology

[0002] In the textile industry, finished fabrics that have undergone weaving, dyeing, coating, or lamination are typically shipped in wide master rolls, with widths commonly ranging from 1.5m, 2.2m, 2.4m, or even wider. However, downstream customers often require narrower fixed-width rolls or multiple strips of equal width. Therefore, the wide master rolls must be cut along their length to the required width and then rewound, which is one of the key processes in textile finishing.

[0003] Currently, Chinese patent publication number CN218756723U, published on March 28, 2023, discloses an automatic slitting device for sunshade fabric, including a workbench, an installation frame installed at the top center of the workbench, a screw movably installed inside the upper part of the installation frame, a threaded sleeve spirally connected to the outer surface of the screw, an electric push rod vertically installed at the bottom end of the threaded sleeve, a slitting knife installed at the bottom end of the electric push rod, a crank handle installed at one end of the screw through the surface of the installation frame, and multiple sets of screws are provided.

[0004] This automatic slitting device for sunshade fabric uses a slitting knife to slit the fabric and a winding roller to wind it up.

[0005] However, existing fabric slitting and winding equipment generally adopts a winding structure with an air shaft and paper tubes. The paper tubes are fitted outside the air shaft, and the paper tubes are centered and locked by radial support from the surface expansion blocks after the air shaft is vented. The slitting finished fabric is then wound sequentially around the outer wall of each paper tube. During production, the initial fixing process between the ends of the slitting fabric and the paper tubes often uses manual pre-treatment bonding: the operator first uses scissors to trim the ends of the fabric to ensure that the end faces are flush, and then uses tape to stick and fix the starting section of the fabric to the surface of the paper tube, thus completing the initial winding. However, manual trimming with scissors is greatly affected by the operator's skill level and the softness or hardness of the fabric material. The end cutting is prone to defects such as slanted edges, rough edges, and uneven lengths. This not only results in large positioning deviations and easy deviations during initial winding, but also causes waste of fabric edges, restricting the finished product qualification rate and processing efficiency of slitting and winding. Summary of the Invention

[0006] The purpose of this invention is to provide a cutting and winding device for printed and dyed fabrics, which can perform flat cutting on the ends of the cut fabric.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a printing and dyeing fabric slitting and winding device, comprising a frame, an unwinding roller rotatably connected to the frame, a guide roller rotatably connected to the frame, a slitting roller rotatably connected to the frame, a slitting blade fixed to the slitting roller, an air shaft rotatably connected to the frame, a paper tube sleeved on the air shaft for winding the slid-out fabric, and a drive motor disposed on the lower side of the frame for driving the air shaft to rotate. A pressure roller for pressing the end of the fabric onto the paper tube is detachably connected to the air shaft. An elongated groove with an extension direction parallel to the extension direction of the pressure roller is opened in the pressure roller. A blade holder is slidably connected in the elongated groove. A shearing blade for cutting the fabric is disposed in the blade holder.

[0008] By adopting the above technical solution, when the end of the fabric needs to be fixed on the paper tube of the air shaft, the air shaft first vents and then the surface expansion block radially supports to achieve centering and locking of the paper tube. Then, double-sided tape is used to stick it to the outer wall of the paper tube, and then the end of the fabric is stuck to the double-sided tape. Then, the pressure roller is used to press the end of the fabric onto the paper tube. The cutter moves along the long groove, and the shearing blade in the cutter moves across the outer wall of the paper tube to cut the end of the fabric. At this time, the cut fabric end can be flatly cut.

[0009] A further feature of the present invention is that the outer wall of the air shaft is made of steel, and two magnet blocks for attracting the outer wall of the air shaft and located at both ends of the paper tube are provided in the elongated groove.

[0010] By adopting the above technical solution, two magnetic blocks are used in the long groove. The magnetic blocks are attracted to the outer wall of the air shaft. At this time, the magnetic force of the magnetic blocks can push the pressure roller to press steadily on the paper tube.

[0011] A further feature of the present invention is as follows: a guide shaft is provided in the elongated groove; a guide sleeve for the guide shaft to pass through is provided on the upper side of the magnet block; multiple vertical holes are provided on the periphery of the guide sleeve; a vertical rod passing through the vertical holes is provided on the magnet block; a connecting plate is fixed between the upper ends of the multiple vertical rods; a reset spring is sleeved on the upper end of the vertical rod, with one end connected to the connecting plate and the other end connected to the guide sleeve; and a pull-out column is provided on the upper side of the connecting plate.

[0012] By adopting the above technical solution, the guide seat on the upper side of the magnet allows the guide shaft to pass through. When it is necessary to change the position of the magnet in the long groove according to the position and length of the paper tube, the magnet is moved up by the pulling column, and then moved along the guide shaft until the magnet moves to the end position of the paper tube. After that, the magnet is released and can be attracted to the outer wall of the air expansion shaft at the end of the paper tube. The pushing force generated by the two magnets on the pressure roller at both ends of the paper tube can drive the pressure roller at the paper tube position to press steadily on the paper tube. At this time, the movable magnet can ensure that there is always a stable pressing force on the pressure roller at the paper tube position.

[0013] A further configuration of the present invention is as follows: a drive shaft is provided inside the frame, connecting arms are provided at both ends of the drive shaft, and convex shafts corresponding to the positions of the connecting arms are provided at both ends of the pressure roller. A cavity is provided inside the end of the connecting arm, and a connecting spring is provided at the end of the connecting arm with one end connected to the inner wall of the cavity and the other end connected to the convex shaft. A drive component for driving the drive shaft to rotate is provided on the frame.

[0014] By adopting the above technical solution, when the pressure roller is not in use, the convex shaft at the end of the pressure roller is pressed against the end of the connecting arm by the restoring force of the connecting spring, so that the pressure roller is connected between the two connecting arms. When the fabric on the paper tube is wound up, the drive shaft is driven to rotate by the drive component, so that the pressure roller swings with the connecting arm to the position of the lower surface of the fabric. Then, by sliding the blade holder, the shearing blade can be used again to cut the tail end of the fabric flat, so that the shearing blade can be used not only to cut the beginning end of the fabric but also to cut the end end of the fabric, ensuring the flatness of the fabric end.

[0015] A further configuration of the present invention is as follows: the magnet block includes a first block near the inner side of the elongated groove, a second block slidably connected to the first block, and a third block slidably connected to the second block. Both the second block and the third block have waist-shaped grooves. Both the sidewalls of the second block and the third block have elongated holes communicating with the waist-shaped grooves. The ends of the first block and the second block are provided with connecting posts embedded in the elongated holes. The ends of the connecting posts are provided with limiting discs embedded in the waist-shaped grooves. The connecting posts and the elongated holes are interference-fitted.

[0016] By adopting the above technical solution, when the fabric is wound onto the paper tube, the drive unit drives the pressure roller to swing to a position below the fabric via the connecting arm. At the same time, the second and third blocks on the first block are moved, causing the second and third blocks to unfold. Then, the first, second, and third blocks can unfold into long strips and be placed horizontally below the fabric. At this time, the first, second, and third blocks can adsorb any metal impurities such as iron filings that may be present in the fabric, thus ensuring the quality of the fabric.

[0017] A further feature of the present invention is that the end of the connecting arm is an arc shape that mates with the outer wall of the convex shaft.

[0018] By adopting the above technical solution, the arc-shaped end of the connecting arm can be used to embed the convex shaft, which is conducive to the stable connection of the convex shaft at the end of the connecting arm.

[0019] A further embodiment of the present invention is that the driving component includes a worm gear box fixed to the side wall of the frame and connected to the end of the drive shaft, a transmission shaft disposed on the side wall of the worm gear box, and a handwheel disposed at the end of the transmission shaft.

[0020] By adopting the above technical solution, when the drive shaft needs to be rotated, the operator can rotate the handwheel, which will drive the worm in the worm gear box to rotate. The worm will then drive the drive shaft to rotate through the worm gear. Since the worm gear transmission has a self-locking characteristic, it can ensure that the drive shaft can be self-locked at any position.

[0021] A further feature of the present invention is that the lower surface of the magnet block is an arc shape that cooperates with the outer wall of the air shaft.

[0022] By adopting the above technical solution, when the magnet blocks are attracted to the outer wall of the air shaft, the arc-shaped outer walls of the two magnet blocks can be attached to the arc-shaped outer wall of the air shaft. This helps to ensure that the pressure roller and the air shaft are in a parallel state, thus ensuring the flatness of the shearing.

[0023] A further feature of the present invention is that a dovetail slider is provided on the side wall of the tool holder, and a dovetail groove is provided on the inner wall of the elongated groove for the dovetail slider to be inserted.

[0024] By adopting the above technical solution, the tool holder uses a dovetail slider to be embedded in the dovetail groove, thereby ensuring the stable movement of the tool holder in the long groove, and at the same time, it will not interfere with the magnet block.

[0025] A further provision of the present invention is that a swing arm is provided on the side wall of the frame, one end of which is hinged to the side wall of the frame, and a support groove is provided at the end of the swing arm for the end of the air expansion shaft to be embedded. A drive cylinder is also provided on the side wall of the frame, one end of which is hinged to the frame and the other end of which is hinged to the swing arm.

[0026] By adopting the above technical solution, when it is necessary to remove the paper tube that has been wound on the air shaft, the driving cylinder drives the swing arm to swing downward, thereby separating the end of the air shaft from the swing arm. After the air shaft exhausts, the paper tube can slide down along the end of the air shaft, which makes it easier to remove the paper tube from the air shaft.

[0027] The beneficial effects of this invention are as follows: When the fabric end needs to be fixed on the paper tube of the air-expanding shaft, the air-expanding shaft first vents air and then the surface expansion block radially supports the paper tube to achieve centering and locking. Then, double-sided tape is used to bond it to the outer wall of the paper tube, and the fabric end is then bonded to the double-sided tape. Subsequently, the pressure roller is used to press the fabric end onto the paper tube. The cutter moves along the long groove, and the shearing blade in the cutter moves across the outer wall of the paper tube to cut the fabric end. At this time, the fabric end obtained by slitting can be flatly cut. The system utilizes two magnets within a long groove, which are attracted to the outer wall of the air shaft. When the position of the magnets within the long groove needs to be changed according to the position and length of the paper tube, the magnets are moved upward using a pulling column and then along the guide shaft until they reach the end of the paper tube. Once the magnets are released, they are attracted to the outer wall of the air shaft at the end of the paper tube. The pushing force generated by the two magnets at both ends of the paper tube on the pressure rollers drives the pressure rollers at the paper tube position to press steadily onto the paper tube. At this time, the movable magnets ensure that there is always a stable pressing force on the pressure rollers at the paper tube position. Meanwhile, when the pressure roller is not needed for cutting the beginning of the fabric, the convex shaft at the end of the pressure roller is pressed against the end of the connecting arm by the restoring force of the connecting spring, so that the pressure roller is connected between the two connecting arms; when the fabric on the paper tube is finished to be wound, the drive shaft is driven to rotate by the handwheel and the worm gear box, so that the pressure roller swings with the connecting arm to the position of the lower surface of the fabric. Then, by sliding the blade holder, the shearing blade can be used again to complete the flat cutting of the tail end of the fabric, so that the shearing blade can be used not only to cut the beginning of the fabric but also to cut the tail end of the fabric, ensuring the flatness of the fabric end; When the fabric is wound onto the paper tube, the handwheel and worm gear box drive the pressure roller to swing to a position below the fabric via the connecting arm. At the same time, the second and third blocks on the first block are moved, causing the second and third blocks to unfold. Then, the first, second, and third blocks unfold into long strips and lie horizontally below the fabric. At this time, the first, second, and third blocks can adsorb any metal debris such as iron filings that may be present in the fabric, ensuring the quality of the fabric. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pressure roller in this invention; Figure 3 This is a cross-sectional view showing the connection relationship between the air shaft, paper tube, and pressure roller in this invention; Figure 4 This is a cross-sectional view of the pressure roller in this invention; Figure 5 This is a plan view of the connection relationship between the guide roller, air shaft, paper tube, pressure roller, drive shaft and connecting arm in this invention, which is used to cut the first end of the fabric. Figure 6 This is a schematic diagram of the structure on the magnet block in this invention; Figure 7 This is a partial cross-sectional view of the structure of the first block, the second block, and the third block in this invention after they have been unfolded. Figure 8 This is a plan view of the connection relationship between the guide roller, air shaft, paper tube, pressure roller, drive shaft and connecting arm in this invention, which is used to cut the tail end of the fabric. Figure 9 This is a plan view of the connection relationship between the guide roller, air shaft, paper tube, pressure roller, drive shaft and connecting arm in this invention. At this time, the magnetic block is used to adsorb metal debris such as iron filings in the fabric.

[0030] In the diagram, 1. Frame; 11. Unwinding roller; 12. Guide roller; 13. Slitting roller; 131. Slitting blade; 14. Drive motor; 2. Air shaft; 3. Paper tube; 4. Pressure roller; 41. Long groove; 42. Guide shaft; 43. Dovetail slide; 44. Convex shaft; 5. Knife holder; 51. Shearing blade; 52. Dovetail slider; 6. Magnet block; 61. Guide seat sleeve; 611. Vertical hole; 62. Vertical rod; 621. Return spring; 63. Connecting... 631. Connecting plate; 601. Pulling post; 602. First block; 603. Second block; 604. Third block; 6001. Waist-shaped groove; 6002. Long hole; 6003. Connecting post; 6004. Limiting plate; 7. Drive shaft; 71. Connecting arm; 711. Cavity; 712. Connecting spring; 8. Drive component; 81. Worm gear box; 82. Transmission shaft; 83. Handwheel; 9. Swing arm; 91. Support groove; 92. Drive cylinder. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] A cutting and winding device for printed and dyed fabrics, as shown in the reference. Figure 1The printing and dyeing fabric slitting and winding device includes a frame 1, an unwinding roller 11, a guide roller 12, a slitting roller 13, slitting blades 131, an air shaft 2, a paper tube 3, and a drive motor 14. The unwinding roller 11 is rotatably connected to the frame 1 and is used to store the fabric roll to be slitted. The guide roller 12 is rotatably connected to the frame 1 and is used to transport the fabric. The slitting roller 13 is rotatably connected to the frame 1, and multiple slitting blades 131 are fixed on the slitting roller 13. One end of the air shaft 2 is rotatably connected inside the frame 1, and the paper tube 3 is sleeved on the air shaft 2. The drive motor 14 is fixed to the lower side of the frame 1 and drives the air shaft 2 to rotate through chain drive.

[0033] Reference Figure 1 , Figure 2 , Figure 3 A pressure roller 4 for pressing the end of the fabric onto the paper tube 3 is detachably connected to the air shaft 2. The pressure roller 4 has an elongated groove 41 with an extension direction parallel to the extension direction of the pressure roller 4. A knife holder 5 is slidably connected in the elongated groove 41. A shearing knife 51 for cutting the fabric is installed in the knife holder 5. A dovetail slider 52 is fixed on the side wall of the knife holder 5. A dovetail groove 43 for the dovetail slider 52 to be inserted is opened on the inner wall of the elongated groove 41.

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 The outer wall of the air shaft 2 is made of steel. Two magnet blocks 6 are installed in the long groove 41 to attract the outer wall of the air shaft 2 and located at both ends of the paper tube 3. The lower surface of the magnet block 6 is an arc shape that cooperates with the outer wall of the air shaft 2. At the same time, a guide shaft 42 with the extension direction parallel to the extension direction of the long groove 41 is fixed in the long groove 41. A guide seat 61 for the guide shaft 42 to pass through is provided on the upper side of the magnet block 6. Multiple vertical holes 611 are opened on the periphery of the guide seat 61. A vertical rod 62 passing through the vertical holes 611 is fixed on the magnet block 6. A connecting plate 63 is fixed between the upper ends of the multiple vertical rods 62. A return spring 621 with one end connected to the connecting plate 63 and the other end connected to the guide seat 61 is sleeved on the upper end of the vertical rod 62. A pull column 631 is also fixed on the upper side of the connecting plate 63.

[0035] Reference Figure 1 , Figure 5The frame 1 is also rotatably connected to a drive shaft 7, and connecting arms 71 are fixed at both ends of the drive shaft 7. Both ends of the pressure roller 4 are integrally provided with convex shafts 44 corresponding to the positions of the connecting arms 71. The convex shafts 44 are rotatably connected to the ends of the pressure roller 4 through shafts and damping rubber, so that there is a damping force when the convex shafts 44 rotate. A cavity 711 is opened in the end of the connecting arm 71. At the same time, a connecting spring 712 is provided at the end of the connecting arm 71, one end of which is connected to the inner wall of the cavity 711 and the other end is connected to the convex shaft 44. The end of the connecting arm 71 is arc-shaped to cooperate with the outer wall of the convex shaft 44. The frame 1 is also provided with a drive component 8 for driving the drive shaft 7 to rotate. The drive component 8 includes a worm gear box 81 fixed to the side wall of the frame 1 by bolts and connected to the end of the drive shaft 7, a transmission shaft 82 provided on the side wall of the worm gear box 81, and a handwheel 83 provided at the end of the transmission shaft 82.

[0036] Reference Figure 6 , Figure 7 The magnet block 6 includes a first block 601 near the inner side of the elongated groove 41 and fixedly connected to the vertical rod 62, a second block 602 slidably connected to the first block 601, and a third block 603 slidably connected to the second block 602. Both the second block 602 and the third block 603 have waist-shaped grooves 6001, and both the side walls of the second block 602 and the third block 603 have elongated holes 6002 communicating with the waist-shaped grooves 6001. The length of the elongated holes 6002 is less than the width of the waist-shaped grooves 6001. At the same time, the ends of the first block 601 and the second block 602 are fixed with connecting posts 6003 embedded in the elongated holes 6002, and the ends of the connecting posts 6003 are fixed with limiting discs 6004 embedded in the waist-shaped grooves 6001. The connecting posts 6003 and the elongated holes 6002 are interference-fitted.

[0037] Reference Figure 1 A swing arm 9 is also provided on the side wall of the frame 1, with one end hinged to the side wall of the frame 1. The end of the swing arm 9 is provided with a support groove 91 for the end of the air expansion shaft 2 to be embedded. A drive cylinder 92 is also provided on the side wall of the frame 1, with one end hinged to the frame 1 and the other end hinged to the swing arm 9.

[0038] Principle: When the fabric end needs to be fixed on the paper tube 3 of the air shaft 2, the air shaft 2 first vents and the surface expansion block radially supports the paper tube 3 to achieve centering and locking. Then, double-sided tape is used to stick it to the outer wall of the paper tube 3, and the fabric end is then stuck to the double-sided tape. Then, the pressure roller 4 is used to press the fabric end onto the paper tube 3. The cutter 5 moves along the long groove 41, and the shearing blade 51 in the cutter 5 cuts the fabric end after passing through the outer wall of the paper tube 3. At this time, the fabric end obtained by cutting can be flatly cut. Two magnets 6 are used in the long groove 41, and the magnets 6 are attracted to the outer wall of the air shaft 2. When it is necessary to change the position of the magnets 6 in the long groove 41 according to the position and length of the paper tube 3, the magnets 6 are moved upward by the pulling column 631, and then moved along the guide shaft 42 until the magnets 6 are moved to the end position of the paper tube 3. Then the magnets 6 are released and can be attracted to the outer wall of the air shaft 2 at the end of the paper tube 3. The pushing force generated by the two magnets 6 at both ends of the paper tube 3 on the pressure roller 4 can drive the pressure roller 4 at the position of the paper tube 3 to press steadily on the paper tube 3. At this time, the movable magnets 6 can ensure that there is always a stable pressing force on the pressure roller 4 at the position of the paper tube 3. Meanwhile, when the pressure roller 4 is not needed for cutting the beginning of the fabric, the convex shaft 44 at the end of the pressure roller 4 is pressed against the end of the connecting arm 71 by the restoring force of the connecting spring 712, so that the pressure roller 4 is connected between the two connecting arms 71; when the fabric on the paper tube 3 is finished to be wound up, the drive shaft 7 is driven to rotate by the handwheel 83 and the worm gear box 81, so that the pressure roller 4 swings with the connecting arm 71 to the position of the lower surface of the fabric (refer to...). Figure 8 Then, by sliding the blade holder 5, the shearing blade 51 can be used again to cut the tail end of the fabric, so that the shearing blade 51 can be used not only to cut the beginning end of the fabric but also to cut the end end of the fabric, ensuring the flatness of the fabric end. When the fabric is wound onto the paper tube 3, the handwheel 83 and the worm gear box 81 drive the pressure roller 4 to swing to a position below the fabric via the connecting arm 71. At the same time, the second block 602 and the third block 603 on the first block 601 are moved, causing the second block 602 and the third block 603 to unfold. Then, the first block 601, the second block 602, and the third block 603 can unfold into a long strip and be placed horizontally below the fabric (see reference). Figure 7 and Figure 9 At this point, the first block 601, the second block 602 and the third block 603 can adsorb any metal debris such as iron filings that may be present in the fabric, thus ensuring the quality of the fabric.

Claims

1. A fabric slitting and winding device, comprising a frame (1), a winding roller (11) rotatably connected to the frame (1), a guide roller (12) rotatably connected to the frame (1), a slitting roller (13) rotatably connected to the frame (1), a slitting blade (131) fixed on the slitting roller (13), an air shaft (2) rotatably connected to the frame (1), a paper tube (3) sleeved on the air shaft (2) and used to wind up the slitting fabric, and a drive motor (14) disposed on the lower side of the frame (1) for driving the air shaft (2) to rotate, characterized in that: The air shaft (2) is detachably connected to a pressure roller (4) for pressing the end of the fabric onto the paper tube (3). The pressure roller (4) has an elongated groove (41) with an extension direction parallel to the extension direction of the pressure roller (4). A knife holder (5) is slidably connected in the elongated groove (41). A shearing knife (51) for cutting the fabric is provided in the knife holder (5).

2. The printing and dyeing fabric slitting and winding device according to claim 1, characterized in that: The outer wall of the air shaft (2) is made of steel, and two magnet blocks (6) are provided in the long groove (41) for attracting the outer wall of the air shaft (2) and located at both ends of the paper tube (3).

3. The printing and dyeing fabric slitting and winding device according to claim 2, characterized in that: A guide shaft (42) is provided in the long groove (41). A guide seat (61) for the guide shaft (42) to pass through is provided on the upper side of the magnet block (6). Multiple vertical holes (611) are opened on the periphery of the guide seat (61). A vertical rod (62) passing through the vertical hole (611) is provided on the magnet block (6). A connecting plate (63) is fixed between the upper ends of the multiple vertical rods (62). A reset spring (621) with one end connected to the connecting plate (63) and the other end connected to the guide seat (61) is sleeved on the upper end of the vertical rod (62). A pull-out column (631) is provided on the upper side of the connecting plate (63).

4. The printing and dyeing fabric slitting and winding device according to claim 2, characterized in that: The frame (1) is provided with a drive shaft (7), and the two ends of the drive shaft (7) are provided with connecting arms (71). The two ends of the pressure roller (4) are provided with convex shafts (44) corresponding to the positions of the connecting arms (71). The end of the connecting arm (71) is provided with a cavity (711). The end of the connecting arm (71) is provided with a connecting spring (712) with one end connected to the inner wall of the cavity (711) and the other end connected to the convex shaft (44). The frame (1) is provided with a drive component (8) for driving the drive shaft (7) to rotate.

5. The printing and dyeing fabric slitting and winding device according to claim 4, characterized in that: The magnet block (6) includes a first block (601) near the inner side of the elongated groove (41), a second block (602) slidably connected to the first block (601), and a third block (603) slidably connected to the second block (602). Both the second block (602) and the third block (603) have waist-shaped grooves (6001) inside. Both the second block (602) and the third block (603) have elongated holes (6002) communicating with the waist-shaped grooves (6001) on their side walls. Both the first block (601) and the second block (602) have connecting posts (6003) embedded in the elongated holes (6002) at their ends. The end of the connecting post (6003) has a limiting plate (6004) embedded in the waist-shaped groove (6001). The connecting post (6003) and the elongated hole (6002) are interference-fitted.

6. The printing and dyeing fabric slitting and winding device according to claim 4, characterized in that: The end of the connecting arm (71) is an arc shape that mates with the outer wall of the convex shaft (44).

7. The printing and dyeing fabric slitting and winding device according to claim 4, characterized in that: The drive unit (8) includes a worm gear box (81) fixed on the side wall of the frame (1) and connected to the end of the drive shaft (7), a transmission shaft (82) disposed on the side wall of the worm gear box (81), and a handwheel (83) disposed at the end of the transmission shaft (82).

8. The printing and dyeing fabric slitting and winding device according to claim 2, characterized in that: The lower surface of the magnet block (6) is an arc shape that cooperates with the outer wall of the air shaft (2).

9. The printing and dyeing fabric slitting and winding device according to claim 1, characterized in that: The side wall of the knife holder (5) is provided with a dovetail slider (52), and the inner wall of the long groove (41) is provided with a dovetail groove (43) for the dovetail slider (52) to be inserted.

10. The printing and dyeing fabric slitting and winding device according to claim 1, characterized in that: A swing arm (9) is provided on the side wall of the frame (1), with one end hinged to the side wall of the frame (1). The end of the swing arm (9) is provided with a support groove (91) into which the end of the air expansion shaft (2) is embedded. A drive cylinder (92) is also provided on the side wall of the frame (1), with one end hinged to the frame (1) and the other end hinged to the swing arm (9).

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