A device and method for preparing a high water-absorbing and easy-to-dye modified polyamide fiber

Abstract

The present application belongs to the field of fiber processing, especially a kind of high water-absorbing easy-to-dye modified polyamide fiber preparation device and method, in view of the existing fiber tow bending in the process of conveying and cutting, affecting the control length of tow when cutting, and the tow cannot be fixed during cutting, and the problem of easy movement of tow, the following scheme is proposed, it includes box, the bottom four corners of the box are fixedly provided with support legs, one side inner wall of the box is rotatably provided with two rotating shafts, one end of two rotating shafts is fixedly provided with rotating disc, the rotating disc is barrel-shaped, the device utilizes screw and lifting plate system driven by motor, combined with the transmission mechanism of rack and pinion, the rotating disc can be stably and controllably rotated to convey tow, and the cutting knife driven by sliding block is used to realize quick cutting at appropriate position, in addition, the adjusting assembly, guide rod and spring system in the device enhance the flexibility and stability of operation.

Description

Technical Field

[0001] This invention relates to the field of fiber processing technology, and in particular to an apparatus and method for preparing highly absorbent and easily dyeable modified polyamide fibers. Background Technology

[0002] Highly absorbent and easily dyeable modified polyamide fiber is a new type of fiber that is modified by chemical or physical means to give conventional polyamide fiber high absorbency and easy dyeing properties. This fiber has excellent water absorption performance, can quickly absorb and retain moisture, and improve the comfort and breathability of wearing. After modification, the dyeing performance of the fiber is significantly improved. It can be dyed with a variety of dyes, and the colors are bright, the color spectrum is complete, the color tone is uniform, and the color fastness is excellent. After the short fiber bundle is stretched and crimped, it is cut into short fibers of a certain length according to the requirements of the finished product. For example, the length of cotton-type short fibers is usually 32-38mm. The cutting of the fiber bundle is mostly done by mechanical cutting machine.

[0003] A search revealed that utility model CN221297153U discloses a polyester staple fiber cutting machine, but this cutting machine has the following disadvantages during use:

[0004] 1. During the conveying and cutting process, the fiber bundles are prone to bending, which affects the control of the bundle length during cutting;

[0005] 2. The filament bundle cannot be fixed during the cutting process, as it is easy for the filament bundle to move. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the easy bending of fiber bundles during the conveying and cutting process, which affects the control of the bundle length during cutting, and the inability to fix the bundles during cutting, leading to easy bundle movement. Therefore, this invention proposes a device and method for preparing highly absorbent and easily dyeable modified polyamide fibers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A device for preparing highly absorbent and easily dyeable modified polyamide fibers includes a box body. Support legs are fixedly provided at the four corners of the bottom of the box body. Two rotating shafts are rotatably provided on one inner wall of the box body. A rotating disk is fixedly provided at one end of each of the two rotating shafts. The rotating disk is barrel-shaped. A guide tube is fixedly provided through the top of the box body. An arc-shaped opening corresponding to the two rotating disks is opened in the middle section of the guide tube for guiding the fiber bundle between the two rotating disks.

[0009] The box is equipped with a second fixing rod. Two rectangular slots are opened on one side of the second fixing rod. A sliding block is slidably arranged in the rectangular slot. A cutter located in the rotating disk is fixed on one side of the sliding block. The outer wall of the rotating disk is provided with multiple rectangular openings that are adapted to the cutter.

[0010] The drive assembly, located inside the housing, is used to drive the two rotating disks to rotate relative to each other, conveying the filament bundle, and after conveying it to the correct position, it drives the two cutters to move closer together to cut the filament bundle.

[0011] In one possible design, the drive assembly includes a first guide rod fixedly mounted inside the housing, a lifting plate slidably sleeved on the outer wall of the first guide rod, a screw rotatably mounted through the bottom of the housing, a motor fixedly mounted at the bottom of the housing, the output end of the motor being fixedly connected to the screw, the lifting plate being threadedly sleeved on the screw, a connecting plate being connected to the top of the lifting plate, both the connecting plate and the lifting plate being slidably sleeved on the guide cylinder, and a transmission component cooperating with two rotating shafts being provided on the top of the connecting plate to drive the two rotating disks to rotate during the lifting and moving process.

[0012] In one possible design, the transmission component includes two racks mounted on a connecting plate, with the top ends of the two racks fixed to the same mounting bracket. The outer wall of the rotating shaft is fitted with a gear that meshes with the racks via a one-way bearing. The rotating shaft is provided with an adjustment assembly for adjusting the position of the connecting plate on the racks.

[0013] In one possible design, the adjustment assembly includes an electric push rod fixedly mounted on the top of the connecting plate, a sliding plate slidably mounted on the top of the connecting plate, the output end of the electric push rod being fixedly connected to the sliding plate, multiple slots being provided on one side of each of the two racks, two fixing blocks adapted to the slots being fixedly mounted on one side of the sliding plate, and rectangular holes corresponding to the two racks being provided on the top of both the connecting plate and the lifting plate.

[0014] In one possible design, a first fixing rod is fixedly provided on the inner wall of the box. Two second guide rods are slidably provided through the top of the first fixing rod. The bottom of the two second guide rods is fixedly provided with the same fixing plate. A trapezoidal hole is opened on one side of the fixing plate. Both sliding blocks are located in the trapezoidal hole. The fixing plate is used in conjunction with the lifting plate. A first spring is sleeved on the outer wall of the second guide rod. The two ends of the first spring are fixedly connected to the adjacent sides of the first fixing rod and the fixing plate, respectively.

[0015] In one possible design, two third guide rods are slidably provided through the top of the connecting plate, and both third guide rods are fixedly provided on the top of the lifting plate. A third spring is sleeved on the outer wall of the third guide rod, and the two ends of the third spring are respectively fixedly connected to the adjacent side of the connecting plate and the lifting plate. A top rod corresponding to the fixed plate is slidably provided through the top of the connecting plate, and the bottom end of the top rod is fixedly provided on the top of the lifting plate.

[0016] In one possible design, a third fixing rod is fixedly installed inside the rectangular groove, the sliding block is slidably sleeved on the outer wall of the third fixing rod, and a second spring is sleeved on the outer wall of the third fixing rod. The two ends of the second spring are respectively fixedly connected to one side of the sliding block and one side of the inner wall of the rectangular groove.

[0017] In one possible design, the outer wall of the rotating disk is fixed with a plurality of rubber pads corresponding to the rectangular opening for elastically clamping the filament bundle.

[0018] A method for using an apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers includes the following steps:

[0019] S1. First, the filament bundle is conveyed into the guide cylinder by the conveyor until the bottom of the filament bundle contacts the rotating disk;

[0020] S2. Then start the motor to drive the connecting plate to move upward. During the upward movement, the two rotating disks rotate relative to each other, and the filament bundle is conveyed downward.

[0021] S3. Continue until the connecting plate contacts the two rotating disks. At this point, the filament feeding is complete. Then, start the motor again to drive the lifting plate to move upward, which will cause the two cutters to move closer to each other and cut the filament.

[0022] S4. After the cutting is completed, start the motor to rotate in the opposite direction, driving the lifting plate and connecting plate to move downward. After resetting, repeat the above actions to cut continuously.

[0023] Beneficial effects:

[0024] In this invention, the device for preparing highly absorbent and easily dyeable modified polyamide fibers enables efficient conveying and precise cutting of the fiber bundle through two rotating disks and a drive assembly. The motor and screw design in the drive assembly allows the lifting plate to rise and fall stably, and the rack on the connecting plate cooperates with the gear on the rotating shaft to effectively drive the rotating disk to rotate, thereby achieving continuous conveying of the fiber bundle. When the fiber bundle is conveyed to the correct position, the sliding block and the cutter can quickly cut the fiber bundle, improving the preparation efficiency.

[0025] In this invention, the device for preparing highly absorbent and easily dyeable modified polyamide fibers allows users to adjust the position of the rack on the connecting plate according to actual needs by adjusting the settings of components such as electric push rods and sliding plates, thereby adjusting the rotation range of the rotating disk and enabling the device to adjust different filament conveying lengths.

[0026] In this invention, the device utilizes a motor-driven screw and lifting plate system, combined with a rack and pinion transmission mechanism, to smoothly and controllably rotate the rotating disk to transport the filament bundle, and to quickly cut it at the appropriate position using a cutter driven by a sliding block. In addition, the adjustment components, guide rods, and spring system in the device enhance the flexibility and stability of operation, ensuring precise control of the filament bundle during transport and cutting. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of a device for preparing highly absorbent and easily dyeable modified polyamide fibers according to the present invention.

[0028] Figure 2 This is a cross-sectional view of the apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers proposed in this invention.

[0029] Figure 3 This is a schematic diagram of the gear and rack mounting structure of a device for preparing highly absorbent and easily dyeable modified polyamide fibers according to the present invention.

[0030] Figure 4 This is a schematic diagram of the rotating disk structure of a device for preparing highly absorbent and easily dyeable modified polyamide fibers according to the present invention.

[0031] Figure 5 This is a schematic diagram of the sliding block and limiting plate structure of a device for preparing highly absorbent and easily dyeable modified polyamide fibers according to the present invention.

[0032] Figure 6 This is a schematic diagram of the cutter mounting structure of a device for preparing highly absorbent and easily dyeable modified polyamide fibers according to the present invention.

[0033] Figure 7 This is a schematic diagram of the lifting plate and push rod structure of a device for preparing highly absorbent and easily dyeable modified polyamide fibers according to the present invention.

[0034] Figure 8 for Figure 7 Enlarged structural diagram of section A in the middle.

[0035] In the diagram: 1. Box body; 2. Guide cylinder; 3. Support leg; 4. Motor; 5. Rotating disk; 6. First guide rod; 7. Connecting plate; 8. Lifting plate; 9. Screw; 10. Rotating shaft; 11. Gear; 12. Rack; 13. Electric push rod; 14. Sliding plate; 15. Fixing frame; 16. First fixing rod; 17. Second fixing rod; 18. Rectangular opening; 19. Rubber pad; 20. Second guide rod; 21. First spring; 22. Fixing plate; 23. Trapezoidal hole; 24. Rectangular groove; 25. Third fixing rod; 26. Sliding block; 27. Second spring; 28. Cutter; 29. ​​Third guide rod; 30. Third spring; 31. Top rod; 32. Arc-shaped opening; 33. Rectangular hole; 34. Fixing block; 35. Slot. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Example 1

[0038] Reference Figures 1-8 A preparation apparatus includes: a housing 1, with support legs 3 at each of the four corners of the bottom of the housing 1, provided by welding or other fixing methods to provide stable support. Two rotating shafts 10 are provided on one inner wall of the housing 1 via a rotatable connection such as bearings. One end of each of these rotating shafts 10 is fixedly connected to a rotating disk 5, which is barrel-shaped and used to accommodate a cutter 28.

[0039] A guide cylinder 2 is fixedly installed through the top of the housing 1. The middle section of the guide cylinder 2 has an arc-shaped opening 32 corresponding to the two rotating disks 5. The design of this arc-shaped opening 32 allows the filament bundle to be smoothly guided between the two rotating disks 5, preparing for the subsequent processing.

[0040] Inside the housing 1, a second fixing rod 17 is also provided, with two rectangular slots 24 on one side. Sliding blocks 26 are slidably mounted in each of these rectangular slots 24, and a cutter 28 located inside the rotating disk 5 is fixedly connected to one side of each sliding block 26. Meanwhile, multiple rectangular openings 18 adapted to the cutter 28 are provided on the outer wall of the rotating disk 5, allowing the cutter 28 to extend and cut the filament bundle when needed.

[0041] To drive the two rotating disks 5 to rotate relative to each other to transport the filament bundle, and to bring the two cutters 28 closer together to cut the filament bundle after it has been transported to the correct position, this device is equipped with a drive assembly. This drive assembly includes a first guide rod 6 fixedly disposed inside the housing 1, with a lifting plate 8 slidably fitted onto the outer wall of the first guide rod 6. A screw 9 is rotatably disposed through the bottom of the housing 1, and a motor 4 is fixedly disposed at the bottom of the housing 1, with the output end of the motor 4 fixedly connected to the screw 9. The lifting plate 8 is threaded onto the screw 9, so when the motor 4 is started, it can drive the lifting plate 8 to move up and down along the first guide rod 6.

[0042] A connecting plate 7 is connected to the top of the lifting plate 8 via a connector. Both the connecting plate 7 and the lifting plate 8 are slidably fitted onto the guide cylinder 2. At the top of the connecting plate 7, a transmission component is provided for use with two rotating shafts 10. This transmission component includes two racks 12 mounted on the connecting plate 7, with the same fixing bracket 15 fixed to the top of each rack 12, allowing them to be connected together. The outer wall of the rotating shaft 10 is fitted with gears 11 that mesh with the racks 12 via one-way bearings. When the lifting plate 8 moves the connecting plate 7 up and down, the racks 12 drive the gears 11 to rotate, thereby causing the rotating shafts 10 and the rotating disk 5 to rotate.

[0043] To adjust the position of the connecting plate 7 on the rack 12 to accommodate the processing needs of wire bundles of different lengths, this device also includes an adjustment assembly. This assembly includes an electric push rod 13 fixedly mounted on the top of the connecting plate 7, a sliding plate 14 slidably mounted on the top of the connecting plate 7, and the output end of the electric push rod 13 fixedly connected to the sliding plate 14. Multiple slots 35 are provided on one side of each of the two racks 12, and two fixing blocks 34, which are adapted to the slots 35, are fixedly mounted on one side of the sliding plate 14. By extending and retracting the electric push rod 13, the sliding plate 14 and the fixing blocks 34 can slide on the rack 12, and their positions can be fixed by inserting them into different slots 35. Simultaneously, rectangular holes 33 corresponding to the racks 12 are provided on the tops of both the lifting plate 8 and the connecting plate 7.

[0044] On the inner wall of the housing 1, a first fixing rod 16 is fixedly installed, and two second guide rods 20 are slidably installed through the top of the first fixing rod 16. The bottom of the two second guide rods 20 is fixedly installed with the same fixing plate 22. A trapezoidal hole 23 is opened on one side of the fixing plate 22, and two sliding blocks 26 are located in the trapezoidal hole 23. The fixing plate 22 is used in conjunction with the lifting plate 8. When the lifting plate 8 rises, it pushes the fixing plate 22 to move upward. When the fixing plate 22 moves upward, it can drive the sliding blocks 26 to move through the trapezoidal hole 23, thereby driving the cutter 28 to extend out of the rectangular opening 18 to cut the wire bundle. On the outer wall of the second guide rod 20, a first spring 21 is also sleeved. The two ends of the first spring 21 are fixedly connected to the first fixing rod 16 and the fixing plate 22 respectively on the side close to each other to provide a restoring force.

[0045] In addition, two third guide rods 29 are slidably mounted through the top of the connecting plate 7, and both third guide rods 29 are fixedly mounted on the top of the lifting plate 8. A third spring 30 is sleeved on the outer wall of the third guide rod 29, and both ends of the third spring 30 are fixedly connected to the adjacent sides of the connecting plate 7 and the lifting plate 8, respectively, to further provide stability and restoring force. Simultaneously, a top rod 31 corresponding to the fixed plate 22 is slidably mounted through the top of the connecting plate 7, and the bottom end of the top rod 31 is fixedly mounted on the top of the lifting plate 8, used to assist in pushing the fixed plate 22 during lifting.

[0046] This application can be used in the field of fiber processing, or in other fields applicable to this application.

[0047] Example 2

[0048] refer to Figures 1-8 An improvement on Example 1 is provided: a device for preparing highly absorbent and easily dyeable modified polyamide fibers, applicable to the fiber processing field. A third fixing rod 25 is fixedly installed within the rectangular groove 24, and a sliding block 26 is slidably sleeved on the outer wall of the third fixing rod 25. A second spring 27 is sleeved on the outer wall of the third fixing rod 25, with both ends of the second spring 27 fixedly connected to one side of the sliding block 26 and one side of the inner wall of the rectangular groove 24, respectively, to provide the restoring force for the cutter 28.

[0049] Finally, multiple rubber pads 19 corresponding to the rectangular opening 18 are fixed on the outer wall of the rotating disk 5. These rubber pads 19 are elastic and can elastically clamp the filament bundle, thereby improving the stability and accuracy of the processing.

[0050] In this application, during use, the device is powered on, and then the filament bundle is conveyed to the guide cylinder 2 via a conveyor. When the filament bundle is inside the guide cylinder 2, it hangs downwards due to its own gravity. When the filament bundle moves between the two rotating disks 5, the motor 4 is started, driving the screw 9 to rotate. The rotation of the screw 9 drives the lifting plate 8 to move upward. During the upward movement of the lifting plate 8, the connecting plate 7 is driven upward by the two third springs 30. During the upward movement of the connecting plate 7, the sliding plate 14 is driven upward. The upward movement of the sliding plate 14 drives the rack 12 to move upward through the cooperation of the fixing block 34 and the slot 35. The upward movement of the rack 12 drives the gear 11 to rotate. The rotation of the gear 11 drives the rotating shaft 10 to rotate through the one-way bearing. The rotating shaft 10 drives the rotating disk 5 to rotate, thus... The two rotating disks 5 rotate relative to each other, which can squeeze the filament bundle through the corresponding two rubber pads 19 and drive the filament bundle to move downward. When the connecting plate 7 touches the bottom of the two rotating disks 5, the two motors 4 continue to start and drive the screw 9 to rotate, which continues to drive the lifting plate 8 to move upward. This can drive the third guide rod 29 to move upward and cooperate with the connecting plate 7 to compress the third spring 30. At the same time, it can drive the top rod 31 to move upward. During the upward movement of the top rod 31, it can touch the fixed plate 22 and move upward. The upward movement of the fixed plate 22 can drive the two sliding blocks 26 to move closer to each other through the trapezoidal hole 23 and compress the second spring 27. During the movement of the sliding block 26, it can drive the cutter 28 to move, so that the two cutters 28 move closer to each other into the corresponding rectangular opening 18 and cut the filament bundle.

[0051] Then, the motor 4 is started to rotate in the opposite direction, which drives the screw 9 to rotate in the opposite direction and drives the lifting plate 8 to move downward. During the downward movement of the lifting plate 8, the top rod 31 can move downward, while the fixed plate 22 can be reset and moved under the action of the two first springs 21. At the same time, the sliding block 26 can be reset and moved under the action of the second spring 27. Continuing to move downward, it can drive the connecting plate 7 to move downward. At the same time, the rack 12 is driven to move downward through the fixed block 34 and the slot 35. The downward movement of the rack 12 drives the gear 11 to rotate. Due to the action of the one-way bearing, the rotation of the gear 11 will not drive the rotating shaft 10 to rotate. After descending to the position, the above work is repeated to continue cutting. The cut wire bundle can automatically fall into the receiving box below through the guide cylinder 2.

[0052] When the cutting length needs to be adjusted, the electric push rod 13 can be activated to retract, which can drive the sliding plate 14 to move, so that the fixing block 34 disengages from the corresponding slot 35. Then, the motor 4 is activated to drive the connecting plate 7 to move upward until it moves to the appropriate position. Then, the electric push rod 13 is activated to extend, which drives the sliding plate 14 to reset and move, so that the fixing block 34 can be inserted into the corresponding slot 35, thereby adjusting the cutting length.

[0053] However, as is well known to those skilled in the art, the working principles and wiring methods of the motor 4 and the electric push rod 13 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for preparing highly absorbent and easily dyeable modified polyamide fibers, characterized in that, The box includes a box body (1), and support legs (3) are fixedly provided at the four corners of the bottom of the box body (1). Two rotating shafts (10) are rotatably provided on one side of the inner wall of the box body (1). A rotating disk (5) is fixedly provided at one end of each of the two rotating shafts (10). The rotating disk (5) is barrel-shaped. A guide cylinder (2) is fixedly provided through the top of the box body (1). An arc-shaped opening (32) corresponding to the two rotating disks (5) is opened in the middle section of the guide cylinder (2) to guide the filament bundle between the two rotating disks (5). The box (1) is provided with a second fixing rod (17). Two rectangular grooves (24) are opened on one side of the second fixing rod (17). A sliding block (26) is slidably provided in the rectangular groove (24). A cutter (28) located in the rotating disk (5) is fixed on one side of the sliding block (26). A plurality of rectangular openings (18) adapted to the cutter (28) are opened on the outer wall of the rotating disk (5). The drive assembly is located inside the housing (1) and is used to drive the two rotating disks (5) to rotate relative to each other, to transport the filament bundle, and after the filament bundle is transported to the position, to drive the two cutters (28) to move closer to each other to cut the filament bundle; The drive assembly includes a first guide rod (6) fixedly installed inside the housing (1), a lifting plate (8) slidably sleeved on the outer wall of the first guide rod (6), a screw (9) rotatably installed through the bottom of the housing (1), a motor (4) fixedly installed at the bottom of the housing (1), the output end of the motor (4) being fixedly connected to the screw (9), the lifting plate (8) being threadedly sleeved on the screw (9), a connecting plate (7) connected to the top of the lifting plate (8), both the connecting plate (7) and the lifting plate (8) being slidably sleeved on the guide cylinder (2), and a transmission component that works with two rotating shafts (10) at the top of the connecting plate (7) to drive the two rotating disks (5) to rotate during the lifting and moving process; The transmission component includes two racks (12) mounted on the connecting plate (7). The top ends of the two racks (12) are fixedly mounted on the same fixing frame (15). The outer wall of the rotating shaft (10) is fitted with a gear (11) that meshes with the racks (12) through a one-way bearing. The rotating shaft (10) is provided with an adjustment component for adjusting the position of the connecting plate (7) on the racks (12). The inner wall of the box (1) is fixedly provided with a first fixing rod (16), and two second guide rods (20) are slidably provided through the top of the first fixing rod (16). The bottom of the two second guide rods (20) is fixedly provided with the same fixing plate (22). A trapezoidal hole (23) is opened on one side of the fixing plate (22). The two sliding blocks (26) are located in the trapezoidal hole (23). The fixing plate (22) is used in conjunction with the lifting plate (8). A first spring (21) is sleeved on the outer wall of the second guide rod (20). The two ends of the first spring (21) are fixedly connected to the first fixing rod (16) and the fixing plate (22) respectively on the side close to each other. Two third guide rods (29) are slidably provided through the top of the connecting plate (7). Both third guide rods (29) are fixedly provided on the top of the lifting plate (8). A third spring (30) is sleeved on the outer wall of the third guide rod (29). The two ends of the third spring (30) are fixedly connected to the side of the connecting plate (7) and the lifting plate (8) respectively. A top rod (31) corresponding to the fixed plate (22) is slidably provided through the top of the connecting plate (7). The bottom end of the top rod (31) is fixedly provided on the top of the lifting plate (8).

2. The apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers according to claim 1, characterized in that, The adjustment assembly includes an electric push rod (13) fixedly mounted on the top of the connecting plate (7), a sliding plate (14) slidably mounted on the top of the connecting plate (7), the output end of the electric push rod (13) being fixedly connected to the sliding plate (14), multiple slots (35) being provided on one side of each of the two racks (12), two fixing blocks (34) adapted to the slots (35) being fixedly mounted on one side of the sliding plate (14), and rectangular holes (33) corresponding to the two racks (12) being provided on the top of both the connecting plate (7) and the lifting plate (8).

3. The apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers according to claim 1, characterized in that, A third fixing rod (25) is fixedly provided inside the rectangular groove (24). The sliding block (26) is slidably sleeved on the outer wall of the third fixing rod (25). A second spring (27) is sleeved on the outer wall of the third fixing rod (25). The two ends of the second spring (27) are fixedly connected to one side of the sliding block (26) and one side of the inner wall of the rectangular groove (24), respectively.

4. The apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers according to claim 3, characterized in that, The outer wall of the rotating disk (5) is fixed with a plurality of rubber pads (19) corresponding to the rectangular opening (18) for elastically clamping the filament bundle.

5. A method of using an apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers, applied in the apparatus for preparing highly absorbent and easily dyeable modified polyamide fibers as described in claim 4, characterized in that... Includes the following steps: S1. First, the filament bundle is conveyed to the guide cylinder (2) by the conveyor until the bottom end of the filament bundle contacts the rotating disk (5). S2. Then start the motor (4) to drive the connecting plate (7) to move upward. During the upward movement, the two rotating disks (5) rotate relative to each other, and the filament bundle is conveyed downward. S3. Until the connecting plate (7) touches the two rotating disks (5), the filament feeding is completed. Then start the motor (4) to drive the lifting plate (8) to move upward, which can drive the two cutters (28) to approach each other to cut the filament. S4. After the cutting is completed, start the motor (4) to rotate in the opposite direction, which will drive the lifting plate (8) and the connecting plate (7) to move downward. After the reset is completed, repeat the steps of S1-S4 to achieve continuous cutting of the filament bundle.

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