A production system for nylon chips

Abstract

The present invention relates to the technical field of nylon chip devices, and particularly to a production system for nylon chips. Aiming at the problem of high cost in cutting strip-shaped nylon by existing devices. It includes a bracket, the bracket is fixedly connected with a housing, the housing is rotatably connected with a tool holder, a first feeding roller and a second feeding roller, a fixed knife is fixedly connected inside the housing, the tool holder is detachably installed with rotating knives evenly distributed circumferentially, the first feeding roller and the second feeding roller are driven by a gear set, and the tool holder and the first feeding roller are driven by a belt pulley and belt. By arranging rotating knives evenly distributed circumferentially on the tool holder in the present invention, each rotating knife can be detached, so that when one of the rotating knives is not sharp enough, it can be replaced separately to ensure the uniform particle size of the products cut by the device, and the service life of each rotating knife is prolonged, and the cost of the device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon chip devices, and in particular to a production system for nylon chips. Background Art

[0002] In a traditional nylon chip production system, it is necessary to cut strip-shaped nylon raw materials into granular form to obtain the final product, nylon chips. In the existing device during cutting, a rotating knife and a fixed knife are used in cooperation. The rotating knife consists of a roller shaft and several blades integrally formed therewith. When such a rotating knife is used, if one of the blades becomes dull due to long-term use, the entire rotating knife needs to be replaced. If not replaced, it will result in uneven particle size of the nylon chips, affecting product quality. When replacing the entire rotating knife, the remaining blades on it can still be used normally, which will cause waste of the tool and lead to high production costs. Summary of the Invention

[0003] In order to overcome the disadvantages mentioned in the above background art, the present invention provides a production system for nylon chips.

[0004] The technical solution is as follows: A production system for nylon chips includes a bracket. The bracket is fixedly connected with a housing. The housing is rotatably connected with a tool holder, a first feed roller, and a second feed roller. A fixed knife is fixedly connected inside the housing. The tool holder is detachably installed with rotating knives evenly distributed circumferentially. The first feed roller and the second feed roller are driven by a gear set, and the tool holder and the first feed roller are driven by a belt and pulley.

[0005] As an improvement of the above solution, the bracket is fixedly connected with a motor. The housing is fixedly connected with a first push rod. The telescopic end of the first push rod is rotatably connected with a rotating shaft. The rotating shaft and the output shaft of the motor are driven by a belt and pulley. The housing is provided with a tensioning member for adjusting the tension of the belt between the rotating shaft and the output shaft of the motor. The rotating shaft and the tool holder are driven by friction.

[0006] As an improvement of the above solution, it further includes a loading shell fixedly connected to the housing. A plurality of the rotating knives are placed inside the loading shell. The housing is fixedly connected with a second push rod. The telescopic end of the second push rod is fixedly connected with a knife pushing frame for pushing the rotating knives inside the loading shell.

[0007] As an improvement of the above solution, the tool holder is provided with communication grooves evenly distributed circumferentially. The number of the communication grooves is equal to the number of the rotating knives. A limiting column is slidably connected to one side of the communication groove close to the adjacent rotating knife. A first spring is arranged between the limiting column and the tool holder. The rotating knife is provided with a groove into which the limiting column is inserted to limit the rotating knife. A sliding column is slidably connected to one side of the communication groove close to the rotating shaft.

[0008] As an improvement to the above solution, the tool holder is slidably connected with push plates evenly distributed circumferentially. The number of the push plates is equal to the number of the rotating tools. A second spring is arranged between the push plate and the tool holder. The push plate and the adjacent rotating tool are mutually extruded.

[0009] As an improvement to the above solution, the tool holder is slidably connected with limit blocks evenly distributed circumferentially. The number of the limit blocks is equal to the number of the rotating tools. A third spring is arranged between the limit block and the tool holder. The sliding column is provided with an inclined groove, and the limit block is inserted therein to limit the sliding column.

[0010] As an improvement to the above solution, the housing is fixedly connected with a fixed housing. The fixed housing is slidably connected with a sliding rod. The sliding rod is fixedly connected with a blocking plate. A fourth spring is arranged between the blocking plate and the fixed housing. The blocking plate is used to extrude the sliding column.

[0011] As an improvement to the above solution, the fixed housing is slidably connected with a limiting member. A tension spring is arranged between the limiting member and the fixed housing. The sliding rod is provided with a limiting groove, and the limiting member is inserted therein to limit the sliding rod. The push tool holder is fixedly connected with an extrusion rod, and the extrusion rod is used to extrude the limiting member.

[0012] As an improvement to the above solution, the push tool holder is slidably connected with a sliding rod. The sliding rod is fixedly connected with an extrusion plate. A fifth spring is arranged between the extrusion plate and the push tool holder. The extrusion plate is used to extrude the sliding column.

[0013] As an improvement to the above solution, it further includes a friction block. The housing is provided with a sliding groove. The friction block is slidably connected in the sliding groove. The friction block is used to brake the tool holder. A sliding plate is slidably connected in the sliding groove. A sixth spring and a thin rope are arranged between the sliding plate and the friction block. The sliding groove is communicated with the fixed housing.

[0014] The present invention has the following advantages: By arranging rotating tools evenly distributed circumferentially on the tool holder, each rotating tool can be disassembled, so that when one of the rotating tools is not sharp enough, it can be replaced separately to ensure the uniform particle size of the products cut by the device, and the service life of each rotating tool is prolonged, and the cost of the device is reduced.

[0015] The telescopic end of the second push rod drives the push tool holder to move, so that the push tool holder pushes a new rotating tool to replace the not sharp enough rotating tool, thereby realizing the automatic replacement of the rotating tool, reducing the time used for replacing the rotating tool, reducing the non-production time of the device, and reducing the cost of product production.

[0016] By squeezing the tool holder with the friction block, the tool holder is braked to prevent the sliding column from being blocked and causing the tool holder to reverse when it is forced to stop moving, so as to ensure that the new rotating tool can be aligned with the dull rotating tool and ensure the normal operation of the device. Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the first feed roller and the second feed roller of the present invention;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the limit post and the push plate of the present invention;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the slide bar and the extrusion plate of the present invention;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the sliding column and the limit block of the present invention;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the friction block and the sliding plate of the present invention.

[0023] Names of the reference numerals in the figure: 1. Bracket, 2. Outer shell, 201. Chute, 3. Tool holder, 301. Communication groove, 4. First feed roller, 5. Second feed roller, 6. Fixed knife, 7. Rotating knife, 8. Motor, 9. First push rod, 10. Rotating shaft, 11. Loading shell, 12. Second push rod, 121. Knife pushing frame, 13. Limit post, 14. Sliding column, 15. Push plate, 16. Limit block, 17. Fixed shell, 18. Slide bar, 19. Blocking plate, 20. Limiting member, 21. Extrusion rod, 22. Slide bar, 23. Extrusion plate, 24. Friction block, 25. Sliding plate. Detailed Description of the Invention

[0024] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are for illustrating the present application and not for limiting the scope of the present application. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0025] Embodiment 1: A production system for nylon chips, as Figures 1 - 3 shown, includes a bracket 1, the bracket 1 is fixedly connected with an outer shell 2, the outer shell 2 is rotatably connected with a tool holder 3, a first feed roller 4 and a second feed roller 5, a fixed knife 6 is fixedly connected inside the outer shell 2, the tool holder 3 is detachably installed with circumferentially uniformly distributed rotating knives 7, the first feed roller 4 and the second feed roller 5 are driven by a gear set, and the tool holder 3 and the first feed roller 4 are driven by a belt and pulley.

[0026] In the above solution, it is aimed to enable the rotary knife 7 to be replaced individually to reduce costs. The housing 2 is provided with a feed inlet and a discharge outlet. The feed inlet is located on the upper side, and the discharge outlet is located on the lower side. The feed inlet is used to allow strip-shaped nylon to enter, and the discharge outlet is used to discharge nylon slices. The first feed roller 4 and the second feed roller 5 are located in the right part of the housing 2. The tool holder 3 and the fixed knife 6 are located on the left side of the first feed roller 4 and the second feed roller 5. The rotary knife 7 has a fixed part and a cutting edge part. The width of the fixed part of the rotary knife 7 is greater than the width of the cutting edge part of the rotary knife 7 to prevent the rotary knife 7 from falling off the tool holder 3.

[0027] As Figure 1 and Figure 2 shown, the bracket 1 is fixedly connected with a motor 8, the housing 2 is fixedly connected with a first push rod 9, the telescopic end of the first push rod 9 is rotatably connected with a rotating shaft 10, and the rotating shaft 10 and the output shaft of the motor 8 are belt-driven through a pulley. The housing 2 is provided with a tensioning member for adjusting the tension of the belt between the rotating shaft 10 and the output shaft of the motor 8. The rotating shaft 10 and the tool holder 3 are friction-driven.

[0028] In the above solution, it is aimed to provide power for the rotation of the tool holder 3, the first feed roller 4 and the second feed roller 5. The first push rod 9 is used to adjust the position of the rotating shaft 10. The rotating shaft 10 and the tool holder 3 are both provided with friction wheels, and the two friction wheels are friction-driven.

[0029] Working process: When using this device, first start the motor 8. The output shaft of the motor 8 drives the rotating shaft 10 to rotate through a pulley belt. The rotating shaft 10 drives the tool holder 3 to rotate through two friction wheels. The tool holder 3 drives the rotary knife 7 thereon to rotate. The tool holder 3 drives the first feed roller 4 to rotate through a pulley belt. The first feed roller 4 drives the second feed roller 5 to rotate through a gear set. Then, the raw material is stuffed between the first feed roller 4 and the second feed roller 5. The first feed roller 4 and the second feed roller 5 clamp the raw material and move it. Then, the fixed knife 6 and the rotary knife 7 cut the raw material into particles. As the use time increases, the cutting edge of the rotary knife 7 gradually becomes less sharp, resulting in uneven cutting particle size. At this time, turn off the motor 8, and push the less sharp rotary knife 7 off the tool holder 3, and then insert a new rotary knife 7 into the tool holder 3. Then, the above steps can be repeated to continue working.

[0030] Embodiment 2: As Figure 1 , Figure 2 and Figure 4 shown, it further includes a loading shell 11 fixedly connected to the housing 2. A plurality of rotary knives 7 are placed in the loading shell 11. The housing 2 is fixedly connected with a second push rod 12. The telescopic end of the second push rod 12 is fixedly connected with a knife pushing frame 121, and the knife pushing frame 121 is used to push the rotary knives 7 in the loading shell 11.

[0031] In the above solution, it is aimed to automatically replace the tool turret 7. The loading shell 11 consists of a connecting piece and a rectangular frame. The rectangular frame of the loading shell 11 is provided with a notch for the push tool holder 121 to pass through. The second push rod 12 is used to drive the push tool holder 121 to move.

[0032] As Figure 3 shown, the tool seat 3 is provided with circumferentially uniformly distributed communication grooves 301. The number of the communication grooves 301 is equal to the number of the tool turrets 7. A limiting column 13 is slidably connected to one side of the communication groove 301 adjacent to the tool turret 7. A first spring is arranged between the limiting column 13 and the tool seat 3. The tool turret 7 is provided with a groove, and the limiting column 13 is inserted therein to limit the tool turret 7. A sliding column 14 is slidably connected to one side of the communication groove 301 close to the rotating shaft 10.

[0033] In the above solution, it is aimed to detect whether the tool turret 7 needs to be replaced. The limiting column 13 consists of a hemisphere and a cylinder. The first spring between the limiting column 13 and the tool seat 3 is initially in a compressed state to fix the tool turret 7 by the limiting column 13. However, when the thrust received by the tool turret 7 is greater than the resistance of the limiting column 13 to the tool turret 7, the tool turret 7 will squeeze the limiting column 13 to move and compress the adjacent first spring. The communication groove 301 is filled with a liquid for transmission, such as hydraulic oil. Seals are arranged between both the limiting column 13 and the sliding column 14 and the communication groove 301.

[0034] As Figure 3 shown, the tool seat 3 is slidably connected with circumferentially uniformly distributed push plates 15. The number of the push plates 15 is equal to the number of the tool turrets 7. A second spring is arranged between the push plates 15 and the tool seat 3. The push plates 15 and the adjacent tool turrets 7 are mutually extruded.

[0035] In the above solution, it is aimed to reset the tool turret 7. When the tool turret 7 has some wear but does not reach the degree of needing to be replaced, the tool turret 7 will have a small displacement, but it cannot completely squeeze the limiting column 13 into the communication groove 301. At this time, after the tool turret 7 is displaced, the push plate 15 will push the tool turret 7 to reset under the action of the adjacent second spring. The width of the push plate 15 is greater than the width of the fixed part of the tool turret 7 to prevent the push plate 15 from moving too far and blocking the installation of the tool turret 7.

[0036] As Figure 4 and Figure 5 shown, the tool seat 3 is slidably connected with circumferentially uniformly distributed limiting blocks 16. The number of the limiting blocks 16 is equal to the number of the tool turrets 7. A third spring is arranged between the limiting blocks 16 and the tool seat 3. The sliding column 14 is provided with an inclined groove, and the limiting blocks 16 are inserted therein to limit the sliding column 14.

[0037] In the above solution, it is aimed to fix the sliding column 14. The limiting block 16 is provided with two symmetrically distributed inclined surfaces. The third spring between the limiting block 16 and the tool holder 3 is initially in a compressed state. The maximum resistance of the limiting block 16 to the sliding column 14 is greater than the elastic force of the adjacent first spring on the limiting column 13, thereby preventing the sliding column 14 from immediately retracting after extending.

[0038] As Figure 6 shown, the outer shell 2 is fixedly connected with a fixed shell 17. The fixed shell 17 is slidably connected with a sliding rod 18. The sliding rod 18 is fixedly connected with a blocking plate 19. A fourth spring is arranged between the blocking plate 19 and the fixed shell 17. The blocking plate 19 is used to squeeze the sliding column 14.

[0039] In the above solution, it is aimed to block the sliding column 14 so that the tool holder 3 stops rotating. The fourth spring between the blocking plate 19 and the fixed shell 17 is used to buffer the sliding column 14 to prevent it from being damaged due to directly blocking the sliding column 14.

[0040] As Figure 4 and Figure 6 shown, the fixed shell 17 is slidably connected with a limiting member 20. A tension spring is arranged between the limiting member 20 and the fixed shell 17. The sliding rod 18 is provided with a limiting groove. The limiting member 20 is inserted therein to limit the sliding rod 18. The pushing tool holder 121 is fixedly connected with a pressing rod 21. The pressing rod 21 is used to press the limiting member 20.

[0041] In the above solution, it is aimed to limit and release the limit of the sliding rod 18. The limiting member 20 is composed of a rod with an inclined surface, a plate for installing a spring, and a block for the pressing rod 21 to press. The tension spring between the limiting member 20 and the fixed shell 17 is initially in a stretched state.

[0042] As Figure 4 shown, the pushing tool holder 121 is slidably connected with a sliding rod 22. The sliding rod 22 is fixedly connected with a pressing plate 23. A fifth spring is arranged between the pressing plate 23 and the pushing tool holder 121. The pressing plate 23 is used to press the sliding column 14.

[0043] In the above solution, it is aimed to push the sliding column 14 to reset it. When the pressing plate 23 contacts the sliding column 14, the groove of the rotating tool 7 is not aligned with the limiting column 13. Therefore, the sliding column 14 cannot move at this time. The pressing plate 23 will compress the fifth spring between it and the pushing tool holder 121. When the groove of the rotating tool 7 is aligned with the limiting column 13, the sum of the elastic force of the fifth spring and the elastic force of the adjacent first spring of the limiting column 13 is greater than the resistance of the limiting block 16 to the sliding column 14, thereby resetting the sliding column 14.

[0044] Workflow: When the cutting edge of the rotating cutter 7 is not sharp enough, the resistance encountered by the rotating cutter 7 during cutting of the raw material increases. At this time, the rotating cutter 7 moves into the tool holder 3 and presses against the limit post 13. The limit post 13 moves into the communication groove 301 and presses against the adjacent first spring. The limit post 13 drives the sliding post 14 to move out of the communication groove 301 in a hydraulic manner. The limit block 16 is inserted into the inclined groove on the sliding post 14 under the action of the adjacent third spring, so that the limit post 13 will not reset under the action of the adjacent first spring.

[0045] When the tool holder 3 drives the sliding post 14 to rotate until it contacts the blocking plate 19, then the sliding post 14 presses the blocking plate 19 to move to the right and compress the adjacent fourth spring. The blocking plate 19 drives the sliding rod 18 to move. After the sliding rod 18 moves to the limit position, it stops moving. At this time, the limiting member 20 is inserted into the limiting groove of the sliding rod 18 under the action of the adjacent tension spring. At the same time, the telescopic end of the first push rod 9 contracts, driving the rotating shaft 10 to move downward, separating the friction wheel between the tool holder 3 and the rotating shaft 10. At this time, the tool holder 3 stops rotating. Then, the second push rod 12 is started. The telescopic end of the second push rod 12 contracts, driving the knife pushing frame 121 to move. The knife pushing frame 121 pushes the new rotating cutter 7 in the loading shell 11 to move. At this time, the new rotating cutter 7 moves backward and then contacts the not sharp enough rotating cutter 7, so as to push out the not sharp enough rotating cutter 7 and replace it with the new rotating cutter 7.

[0046] When the knife pushing frame 121 pushes the new rotating cutter 7 to move, the knife pushing frame 121 drives the sliding rod 22 and the pressing plate 23 to move. When the pressing plate 23 contacts the sliding post 14, it stops moving. At this time, the pressing rod 21 contacts the limiting member 20. Next, the knife pushing frame 121 continues to move. The sliding rod 22 and the pressing plate 23 slide relative to the knife pushing frame 121. The pressing plate 23 compresses the adjacent fifth spring. At this time, the right side of the knife pushing frame 121 abuts against the left side of the blocking plate 19. The pressing rod 21 continues to move backward, pressing the limiting member 20 to move upward and stretching the adjacent tension spring, so that the limiting member 20 is separated from the sliding rod 18.

[0047] When the replacement of the new rotating cutter 7 is completed, the limit post 13 is aligned with the groove on the new rotating cutter 7. At this time, the pressing plate 23 pushes the sliding post 14 to reset under the action of the adjacent fifth spring. The sliding post 14 presses the limit block 16, so that the limit block 16 compresses the adjacent third spring and resets. At the same time, the sliding post 14 drives the limit post 13 to reset. Thus, the replacement of the rotating cutter 7 is completed. Then, the telescopic end of the second push rod 12 extends, driving the knife pushing frame 121 to reset. After the knife pushing frame 121 is separated from the blocking plate 19, the blocking plate 19 resets under the action of the adjacent fourth spring. Then, the pressing rod 21 is separated from the limiting member 20. When the reset of the knife pushing frame 121 is completed, the telescopic end of the first push rod 9 extends, pushing the rotating shaft 10 to reset, thereby restoring the transmission between the rotating shaft 10 and the tool holder 3 and enabling the device to continue working.

[0048] Example 3: AsFigure 6 As shown, it further includes a friction block 24. The housing 2 is provided with a sliding groove 201. The friction block 24 is slidably connected in the sliding groove 201. The friction block 24 is used to brake the tool holder 3. A sliding plate 25 is slidably connected in the sliding groove 201. A sixth spring and a thin string are provided between the sliding plate 25 and the friction block 24. The sliding groove 201 communicates with the fixed housing 17.

[0049] In the above solution, it aims to brake the tool holder 3 to prevent the tool holder 3 from rotating in reverse and ensure that the replacement tool 7 is aligned with the new tool 7. A friction material is provided on the side of the friction block 24 close to the tool holder 3 to increase the friction between the two. The sliding groove 201 and the fixed housing 17 are connected by a pipeline, and both are filled with a liquid for transmission, such as hydraulic oil. Seals are provided between the fixed housing 17 and the sliding rod 18 and between the sliding plate 25 and the sliding groove 201. The sixth spring between the sliding plate 25 and the friction block 24 is initially in a compressed state, and the thin string in the bracket between the two is initially in a taut state.

[0050] Working process: When the sliding rod 18 moves to the right, the sliding rod 18 presses the liquid in the fixed housing 17 into the sliding groove 201 through the pipeline. The liquid in the sliding groove 201 increases, pushing the sliding plate 25 to move to the left. The sliding plate 25 pushes the friction block 24 to move through the adjacent sixth spring, making the friction block 24 contact the tool holder 3. Then the sliding plate 25 continues to move to pressurize the sixth spring. At this time, the thin string between the friction block 24 and the sliding plate 25 becomes slack, thereby increasing the friction force of the friction block 24 on the tool holder 3 to brake the tool holder 3 and prevent the tool holder 3 from rotating. When the sliding rod 18 resets, the sliding rod 18 sucks the liquid in the sliding groove 201 back into the fixed housing 17. At this time, the sliding plate 25 starts to reset and gradually straightens the adjacent thin string. When the thin string is straightened, the sliding plate 25 pulls the friction block 24 to separate from the tool holder 3 through the thin string.

[0051] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes can be made therein without departing from the principles and spirit of the present invention.

Claims

1. A production system for nylon chips, characterized in that, It includes a bracket (1), the bracket (1) is fixedly connected with a housing (2), the housing (2) is rotatably connected with a tool holder (3), a first feeding roller (4) and a second feeding roller (5), a fixed knife (6) is fixedly connected inside the housing (2), the tool holder (3) is detachably installed with rotating knives (7) evenly distributed circumferentially, the first feeding roller (4) and the second feeding roller (5) are driven by a gear set, and the tool holder (3) and the first feeding roller (4) are driven by a belt and pulley; The tool holder (3) is provided with communication grooves (301) evenly distributed circumferentially, the number of the communication grooves (301) is equal to the number of the rotating knives (7), a limiting column (13) is slidably connected to one side of the communication groove (301) close to the adjacent rotating knife (7), a first spring is arranged between the limiting column (13) and the tool holder (3), the rotating knife (7) is provided with a groove, and the limiting column (13) is inserted therein to limit the rotating knife (7), and a sliding column (14) is slidably connected to one side of the communication groove (301) close to the rotating shaft (10); The housing (2) is fixedly connected with a fixed housing (17), a sliding rod (18) is slidably connected to the fixed housing (17), the sliding rod (18) is fixedly connected with a blocking plate (19), a fourth spring is arranged between the blocking plate (19) and the fixed housing (17), and the blocking plate (19) is used for extruding the sliding column (14); It further includes a loading housing (11) fixedly connected to the housing (2), several rotating knives (7) are placed in the loading housing (11), the housing (2) is fixedly connected with a second push rod (12), and a push tool holder (121) is fixedly connected to the telescopic end of the second push rod (12), and the push tool holder (121) is used for pushing the rotating knives (7) in the loading housing (11); The tool holder (3) is slidably connected with push plates (15) evenly distributed circumferentially, the number of the push plates (15) is equal to the number of the rotating knives (7), a second spring is arranged between the push plates (15) and the tool holder (3), and the push plates (15) and the adjacent rotating knives (7) are mutually extruded; The tool holder (3) is slidably connected with limit blocks (16) evenly distributed circumferentially, the number of the limit blocks (16) is equal to the number of the rotating knives (7), a third spring is arranged between the limit blocks (16) and the tool holder (3), the sliding column (14) is provided with an inclined groove, and the limit blocks (16) are inserted therein to limit the sliding column (14).

2. The production system of a nylon chip according to claim 1, characterized in that, The bracket (1) is fixedly connected with a motor (8), the housing (2) is fixedly connected with a first push rod (9), the telescopic end of the first push rod (9) is rotatably connected with a rotating shaft (10), the rotating shaft (10) and the output shaft of the motor (8) are driven by a belt and pulley, the housing (2) is provided with a tensioning member for adjusting the tension of the belt between the rotating shaft (10) and the output shaft of the motor (8), and the rotating shaft (10) and the tool holder (3) are driven by friction.

3. A production system for nylon chips according to claim 1, characterized in that, The fixed housing (17) is slidably connected with a limiting member (20). A tension spring is arranged between the limiting member (20) and the fixed housing (17). The sliding rod (18) is provided with a limiting groove, and the limiting member (20) is inserted therein to limit the sliding rod (18). The push knife holder (121) is fixedly connected with a pressing rod (21), and the pressing rod (21) is used for pressing the limiting member (20).

4. A production system for nylon chips according to claim 3, characterized in that, The push knife holder (121) is slidably connected with a sliding rod (22). The sliding rod (22) is fixedly connected with a pressing plate (23). A fifth spring is arranged between the pressing plate (23) and the push knife holder (121). The pressing plate (23) is used for pressing the sliding column (14).

5. The production system of a nylon chip according to claim 3, characterized in that It further includes a friction block (24). The housing (2) is provided with a sliding groove (201). The friction block (24) is slidably connected in the sliding groove (201). The friction block (24) is used for braking the tool holder (3). A sliding plate (25) is slidably connected in the sliding groove (201). A sixth spring and a thin rope are arranged between the sliding plate (25) and the friction block (24). The sliding groove (201) communicates with the fixed housing (17).

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