Fiber crimping machine

Abstract

The utility model discloses a fiber crimping machine which comprises a conveying unit and a crimping unit which are sequentially arranged in a machine frame in the forward conveying direction of tows, the crimping unit comprises a lower tool apron which is fixedly installed on the machine frame, a lower crimping tool is installed on the lower tool apron, and side plates are installed at the left end and the right end of the lower crimping tool respectively. The lower crimping knife and the side plates on the two sides form a groove allowing tows to pass through, the upper knife holder is located above the lower knife holder, the rear end of the upper knife holder is hinged to the lower knife holder, and an upper crimping knife installation seat is arranged in the upper knife holder and installed on the upper knife holder through a position adjusting mechanism. An upper crimping knife downwards corresponding to the groove is arranged at the bottom of the upper crimping knife mounting seat, the rear end of the upper crimping knife is hinged to the rear end of the bottom of the upper crimping knife mounting seat, and the front end of the upper crimping knife is connected to the upper crimping knife mounting seat or the upper knife holder through an upper crimping knife turnover driving mechanism; the front end of the upper tool apron is connected to the rack through an upper tool apron turnover mechanism. The broken wire cleaning device has the advantage that broken wires can be cleaned conveniently.

Description

Technical Field

[0001] This utility model relates to the field of fiber crimping technology, specifically to a fiber crimping machine for crimping chemical fibers such as PPS short fibers and polyester short fibers. Background Technology

[0002] In the chemical fiber industry, to enable chemical fibers such as PPS staple fiber and polyester staple fiber to mimic the crimp of natural fibers, they must undergo crimping processing to enhance their cohesion and spinnability. Crimping machines are currently the most commonly used equipment for crimping chemical fibers.

[0003] The structure of the currently used crimping machine includes: a conveying unit and a crimping unit arranged sequentially in the frame along the direction of the filament bundle. The conveying unit consists of an upper crimping roller and a lower crimping roller distributed vertically. The crimping unit consists of a lower crimping blade and an upper crimping blade fixedly installed on the frame and distributed vertically. The upper crimping blade has a certain working angle relative to the lower crimping blade, and a crimping channel for the filament bundle to pass through is formed between the upper crimping blade and the lower crimping blade.

[0004] During operation, the uniformly thick filaments, preheated by steam, are fed into the crimping channel between the upper and lower crimping knives via the actively rotating upper and lower crimping rollers. As the upper and lower crimping rollers continuously feed the filament bundle into the crimping channel, the upper crimping knives create resistance to the movement of the filament bundle, causing the fibers to crimp within the crimping channel. Furthermore, due to the pushing force of the upper and lower crimping rollers, the crimped filament bundle is continuously pushed out of the crimping channel.

[0005] The current crimping machine has the following drawbacks: both the upper and lower crimping knives are fixedly installed on the frame. When the filament breaks in the crimping channel, the gap between the upper and lower crimping knives is very narrow, making it very inconvenient to clean the broken filaments and affecting production efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a fiber crimping machine that can easily clean up broken fibers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a fiber crimping machine, comprising a conveying unit and a crimping unit arranged sequentially in a frame along the forward conveying direction of the fiber bundle. The conveying unit is used to feed the fiber bundle forward into the crimping unit. The crimping unit includes a lower blade holder and an upper blade holder. The lower blade holder is fixedly installed on the frame, and a lower crimping blade is installed on the lower blade holder. Side plates are respectively installed at the left and right ends of the lower crimping blade. The lower crimping blade and the two side plates form a groove for the fiber bundle to pass through. The upper blade holder is located above the lower blade holder, and the rear end of the upper blade holder is hinged to the lower blade holder via a rotating shaft. An upper crimping blade mounting seat is provided in the upper blade holder, and the upper crimping blade mounting seat is installed on the upper blade holder via a position adjustment mechanism. The bottom of the base is provided with an upper coiling blade corresponding to a downward groove. The rear end of the upper coiling blade is hinged to the rear end of the bottom of the upper coiling blade mounting base. The front end of the upper coiling blade is connected to the upper coiling blade mounting base or the upper blade holder through an upper coiling blade flipping drive mechanism. The upper coiling blade flipping drive mechanism can flip the upper coiling blade to form a working angle with the lower coiling blade. The front end of the upper blade holder is connected to the frame through an upper blade holder flipping mechanism. The upper blade holder flipping mechanism can drive the upper blade holder to flip downward relative to the lower blade holder until the upper coiling blade inserts into the groove so that the upper coiling blade, the lower coiling blade, and the two side plates together form a coiling channel. The upper blade holder flipping mechanism can also drive the upper blade holder to flip upward relative to the lower blade holder until the upper coiling blade moves upward out of the groove to open the coiling channel.

[0008] Furthermore, in the aforementioned fiber crimping machine, the structure of the position adjustment mechanism includes: two L-shaped mounting plates fixed at the bottom of the upper blade holder, respectively located on the left and right sides of the upper crimping blade mounting base; the L-shaped mounting plates are formed by horizontal and vertical plates to create an L-shape; the two L-shaped mounting plates are arranged horizontally opposite each other; the two L-shaped mounting plates and the upper blade holder together form a long groove for the upper crimping blade mounting base to be movably inserted; a stop block is installed at the rear end of each L-shaped mounting plate for the upper crimping blade mounting base to abut against when inserted into the long groove; and several first threaded holes penetrating the corresponding vertical plates in a left-right direction are respectively provided on the vertical plates of the two L-shaped mounting plates, with each first threaded hole containing... A side-clamping bolt is threaded into the upper cutter holder. Each side-clamping bolt extends into the long slot along the corresponding first threaded hole and abuts against the corresponding side wall of the upper cutter holder to position the upper cutter holder in the left-right direction within the long slot. A front mounting plate is detachably installed at the front end of the upper cutter holder, located directly in front of the upper cutter holder inserted into the long slot. The front mounting plate has several second threaded holes that penetrate the front mounting plate in the front-back direction. A front clamping bolt is threaded into each second threaded hole. The front clamping bolt presses the upper cutter holder inserted into the long slot against the stop block to position the upper cutter holder in the front-back direction within the long slot.

[0009] Furthermore, in the aforementioned fiber crimping machine, the front end of the upper crimping blade is connected to the upper blade holder via an upper crimping blade flipping drive mechanism. The structure of the upper crimping blade flipping drive mechanism includes an upper lifting cylinder. The cylinder body of the upper lifting cylinder is hinged to the upper blade holder via a first pin. The piston rod of the upper lifting cylinder faces downward and is fixed with a connector. The connector is provided with a guide hole that passes through the connector in the left and right directions. Two ear plates arranged opposite each other are fixed at the top of the front end of the upper crimping blade. A connecting shaft is supported between the two ear plates. The connector at the end of the piston rod of the upper lifting cylinder is placed between the two ear plates, and the connecting shaft moves through the guide hole of the connector. The distance between the two ear plates can ensure that when the upper crimping blade is adjusted in the left and right direction with the upper crimping blade mounting seat, the upper crimping blade can move left and right relative to the upper lifting cylinder.

[0010] Furthermore, in the aforementioned fiber crimping machine, the structure of the upper blade holder flipping mechanism includes: two lower lifting cylinders distributed on the left and right sides of the lower blade holder. The cylinder body of each lower lifting cylinder is vertically fixed to the frame. The piston rod of each lower lifting cylinder faces upward and is hinged to the lower end of a connecting rod via a second pin. The upper end of the connecting rod is hinged to the front end of the upper blade holder via a third pin. All second pins are coaxially arranged, and all third pins are coaxially arranged. When the piston rods of each lower lifting cylinder extend upward simultaneously, they can drive the upper blade holder to flip upward relative to the lower blade holder via the connecting rods. When the piston rods of each lower lifting cylinder retract downward simultaneously, they can drive the upper blade holder to flip downward relative to the lower blade holder via the connecting rods.

[0011] Furthermore, in the aforementioned fiber crimping machine, a positioning post is provided on each of the left and right sides of the lower blade holder to position the upper blade holder in a downward flipping position. When the upper blade holder flips downward until its front end presses down on the positioning post, the upper crimping blade is inserted into the groove and cooperates with the lower crimping blade and the side plates on both sides to form a crimping channel.

[0012] Furthermore, in the aforementioned fiber crimping machine, the conveying unit includes an upper crimping roller and a lower crimping roller distributed vertically. The upper crimping roller is movably supported on an upper cutter holder, and the lower crimping roller is movably supported on a lower cutter holder. The upper and lower crimping rollers are driven to rotate by a drive mechanism to cooperate in conveying the filament bundle. When the upper cutter holder flips downward relative to the lower cutter holder until the upper crimping cutter inserts into the groove to form a crimping channel, the upper crimping roller flips downward along with the upper cutter holder and presses onto the lower crimping roller, so that the upper and lower crimping rollers can cooperate in conveying the filament bundle. When the upper cutter holder flips upward relative to the lower cutter holder until the upper crimping cutter moves upward away from the groove to open the crimping channel, the upper crimping roller also flips upward along with the upper cutter holder and moves away from the lower crimping roller.

[0013] Furthermore, in the aforementioned fiber crimping machine, the drive mechanism includes an upper crimping roller driven to rotate by an upper motor mounted on an upper cutter holder, and a lower crimping roller driven to rotate by a lower motor mounted on a lower cutter holder. The upper and lower motors cause the upper and lower crimping rollers to rotate in opposite directions to cooperate in forward feeding of the filament bundle.

[0014] Furthermore, in the aforementioned fiber crimping machine, the drive mechanism includes: a motor and a gearbox mounted on a lower cutter holder; an upper drive shaft and a lower drive shaft arranged vertically supported within the gearbox; an upper gear mounted on the upper drive shaft; a lower gear mounted on the lower drive shaft; the upper gear and the lower gear meshing; the output shaft of the motor connected to the lower gear; the end of the upper drive shaft connected to the end of the upper crimping roller via a universal joint; and the end of the lower drive shaft connected to the end of the lower crimping roller via a universal joint.

[0015] The beneficial effects of implementing the above technical solution are: convenient operation and use, high stability, and easy cleaning of broken wires, saving time and effort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a fiber crimping machine according to the present invention.

[0017] Figure 2 This is a schematic diagram showing the state when the upper and lower curling cutters are not at a working angle.

[0018] Figure 3 This is a schematic diagram showing the state when the upper and lower curling cutters are at a working angle.

[0019] Figure 4 for Figure 1 A schematic diagram showing the relative positions and connections of the upper and lower tool holders, upper and lower cutting tool mounting base, upper and lower cutting tool, upper and lower lifting cylinders, viewed from the right.

[0020] Figure 5 This is a structural diagram of an L-shaped mounting plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, a fiber crimping machine includes a conveying unit and a crimping unit arranged sequentially in a frame 1 along the forward conveying direction of the filament bundle. The conveying unit feeds the filament bundle forward into the crimping unit. The crimping unit includes a lower blade holder 4 and an upper blade holder 5. The lower blade holder 4 is fixedly installed on the frame 1. A lower crimping blade 6 is installed on the lower blade holder 4. Side plates 7 are installed at the left and right ends of the lower crimping blade 6, respectively. The lower crimping blade 6 and the two side plates 7 form a groove for the filament bundle to pass through. The upper blade holder 5 is located above the lower blade holder 4. The rear end of the upper blade holder 5 is hinged to the lower blade holder 4 via a rotating shaft 8. An upper crimping blade mounting seat 9 is provided in the upper blade holder 5. The upper crimping blade mounting seat 9 is installed on the upper blade holder through a position adjustment mechanism. An upper crimping blade corresponding to the downward groove is provided at the bottom of the upper crimping blade mounting seat 9. The upper curved blade 10 is hinged to the bottom rear end of the upper curved blade mounting base 9 via a hinge shaft 11. The front end of the upper curved blade 10 is connected to the upper curved blade mounting base 9 or the upper blade holder 5 via an upper curved blade flipping drive mechanism. The upper curved blade flipping drive mechanism can flip the upper curved blade 10 to form a working angle with the lower curved blade 6. The front end of the upper blade holder 5 is connected to the frame 1 via an upper blade holder flipping mechanism. The upper blade holder flipping mechanism can drive the upper blade holder 5 to flip downward relative to the lower blade holder 4 until the upper curved blade 10 is inserted into the groove so that the upper curved blade 10, the lower curved blade 6, and the two side plates 7 together form a curling channel. The upper blade holder 5 flipping mechanism can also drive the upper blade holder 5 to flip upward relative to the lower blade holder 4 until the upper curved blade 10 moves upward away from the groove to open the curling channel.

[0023] In this embodiment, the structure of the position adjustment mechanism includes: two L-shaped mounting plates 12 fixed at the bottom of the upper blade holder 5, located on the left and right sides of the upper coiling blade mounting base 9 respectively. The L-shaped mounting plates 12 are formed by a horizontal plate 121 and a vertical plate 122, forming an L-shape. The two L-shaped mounting plates 12 are arranged opposite each other with the horizontal plates 121 facing each other. The two L-shaped mounting plates 12 and the lower end face of the upper blade holder 5 together form a long groove for the upper coiling blade mounting base 9 to be movably inserted. A stop block 13 is installed at the rear end of each L-shaped mounting plate 12 for the upper coiling blade mounting base 9 to be inserted into the long groove to abut against. Several first threaded holes 123 are respectively provided on the vertical plates 122 of the two L-shaped mounting plates 12, which are oriented left and right and pass through the corresponding vertical plates. Each of the three sections is threaded with a side-clamping bolt 14. Each side-clamping bolt 14 extends into the long groove along the corresponding first threaded hole 123 and abuts against the corresponding side wall of the upper coiling cutter mounting seat 9 to position the upper coiling cutter mounting seat 9 in the long groove in the left-right direction. A front mounting plate 15 is detachably installed at the front end of the upper cutter holder 5, located directly in front of the upper coiling cutter mounting seat 9 inserted into the long groove. The front mounting plate 15 is detachably installed on the upper cutter holder 5 by connecting threads. Several second threaded holes are provided on the front mounting plate 15, which are connected to the front mounting plate in the front-rear direction. A front clamping bolt 16 is threaded into each second threaded hole. The front clamping bolt 16 presses the upper coiling cutter mounting seat 9 inserted into the long groove against the stop block 13. The upper curling knife mounting base 9 is positioned in the front-to-back direction within the long groove. In this embodiment, the upper knife holder 5 adopts a flip-up structure. Before curling the filament bundle, the upper curling knife 10 must first flip downwards with the upper knife holder 5 to insert into the groove, so that the upper curling knife 10, the lower curling knife 6, and the side plates 7 together form a curling channel. Therefore, when assembling the upper curling knife 10, it is necessary to ensure that the upper curling knife 10 is accurately positioned in the left-to-right direction, and that the upper curling knife 10 can accurately insert into the groove when it flips downwards with the upper knife holder 5. Therefore, the left-to-right position of the upper curling knife mounting base 9 can be adjusted by the position adjustment mechanism, thereby adjusting the left-to-right position of the upper curling knife 10 to ensure that the upper curling knife 10 is accurately positioned in the groove. The accurate left-right positioning ensures that the upper coiling cutter 10 can be accurately inserted into the groove when the upper cutter holder 5 flips downward. During operation, the left-right position of the upper coiling cutter mounting seat 9 in the long groove can be adjusted synchronously by adjusting the length of the side tightening bolts 14 on both sides extending into the long groove, thereby adjusting the left-right position of the upper coiling cutter 10. After the upper coiling cutter 10 is adjusted into place, the upper coiling cutter mounting seat 9 inserted into the long groove is pressed against the stop block 13 by the front tightening bolt 16 to position the upper coiling cutter mounting seat 9 in the front-back direction in the long groove, thereby positioning the upper coiling cutter 10 in the front-back direction and preventing the upper coiling cutter 10 from moving back and forth during operation, which helps to improve working stability.

[0024] In this embodiment, the front end of the upper coiling blade 10 is connected to the upper blade holder 5 via an upper coiling blade flipping drive mechanism. The structure of the upper coiling blade flipping drive mechanism includes: an upper lifting cylinder 17, the cylinder body of which is hinged to the upper blade holder 5 via a first pin 18; the piston rod of the upper lifting cylinder 17 faces downward and is fixed with a connector 19; the connector 19 is provided with a guide hole that passes through the connector in the left and right directions; two ear plates 20 arranged opposite each other are fixed at the top of the front end of the upper coiling blade 10; a connecting shaft 21 is supported between the two ear plates 20; the connector 19 at the end of the piston rod of the upper lifting cylinder 17 is placed between the two ear plates 20, and the connecting shaft 21 moves through the guide hole of the connector 19, so that the connecting shaft 21 moves through the guide hole of the connector 19. The connector 19 is movably sleeved on the connecting shaft 21 through the guide hole. The distance between the two ear plates 20 can ensure that when the upper coiling blade 10 is adjusted in the left and right direction with the upper coiling blade mounting seat 9, the upper coiling blade 10 can move left and right relative to the upper lifting cylinder 17. That is, since the upper coiling blade 10, the two ear plates 20 and the connecting shaft 21 are connected as a whole, when the upper coiling blade 10 is adjusted in the left and right direction with the upper coiling blade mounting seat 9, the upper coiling blade 10 can move left and right relative to the upper lifting cylinder 17 through the guide hole of the connector 19 at the end of the piston rod of the upper lifting cylinder via the connecting shaft 21. This allows the upper lifting cylinder 17 to perform a flipping operation on the upper coiling blade 10 without hindering the left and right movement of the upper coiling blade 10.

[0025] In this embodiment, the upper tool holder flipping mechanism includes two lower lifting cylinders 22 distributed on the left and right sides of the lower tool holder 4. The cylinder body of each lower lifting cylinder 22 is vertically fixed to the frame 1. The piston rod of each lower lifting cylinder faces upward and is hinged to the lower end of the connecting rod 23 via a second pin. The upper end of the connecting rod 23 is hinged to the front end of the upper tool holder 5 via a third pin 25. All second pins 24 and all third pins 25 are coaxially arranged. When the piston rods of each lower lifting cylinder 22 extend upward simultaneously, they can drive the upper tool holder 5 via the connecting rods 23. When the upper cutter seat 5 flips upward relative to the lower cutter seat 4, and the piston rods of each lower lifting cylinder 22 retract downward simultaneously, they can drive the upper cutter seat 5 to flip downward relative to the lower cutter seat 4 through each connecting rod 23. The above-mentioned upper cutter seat flipping mechanism has a simple structure and is easy to operate. In this embodiment, a positioning post 26 is provided on the left and right sides of the lower cutter seat 4 to position the upper cutter seat in the downward flipping position. When the upper cutter seat flips downward until the front end presses down on the positioning post 26, the upper curling cutter 10 is inserted into the groove and cooperates with the lower curling cutter 6 and the side plates 7 on both sides to form a curling channel.

[0026] In this embodiment, the conveying unit includes an upper crimping roller 2 and a lower crimping roller 3 distributed vertically. The upper crimping roller 2 is movably supported on an upper cutter holder 5, and the lower crimping roller 3 is movably supported on a lower cutter holder 4. The upper crimping roller 2 and the lower crimping roller 3 are driven to rotate by a drive mechanism to cooperate in conveying the filament bundle. In actual use, the structure of the drive mechanism is diverse. The structure of the drive mechanism can be: the upper crimping roller 2 is driven to rotate by an upper motor installed on the upper cutter holder 5, and the lower crimping roller 3 is driven to rotate by a lower motor installed on the lower cutter holder 4. The upper motor and the lower motor cause the upper crimping roller 2 and the lower crimping roller 3 to rotate towards each other to cooperate in conveying the filament bundle forward. The structure of the drive mechanism can also be: a motor and a reduction gearbox are installed on the lower cutter holder, and an upper drive shaft and a lower drive shaft arranged vertically are supported in the reduction gearbox. An upper gear is sleeved on the shaft of the upper drive shaft, and a lower gear is sleeved on the shaft of the lower drive shaft. The gear meshes with the lower gear, and the output shaft of the motor is connected to the lower gear. The shaft end of the upper drive shaft is connected to the shaft end of the upper crimping roller through a universal joint, and the shaft end of the lower drive shaft is connected to the shaft end of the lower crimping roller through a universal joint. Since the upper drive shaft is connected to the upper crimping roller through a universal joint, which is a commonly used connector in the market, the structure of the universal joint will not be described in detail here. The universal joint ensures that when the upper crimping roller rotates with the upper cutter holder, the upper crimping roller can still be effectively connected and drive the upper drive shaft to rotate, so that the upper drive shaft can still drive the upper crimping roller to rotate. When this drive mechanism is activated, the motor drives the lower drive shaft to rotate. While the lower drive shaft drives the lower crimping roller to rotate, the lower drive shaft also drives the upper drive shaft to rotate through the engagement of the lower gear and the upper gear. When the upper drive shaft rotates, it synchronously drives the upper crimping roller to rotate, so that the upper crimping roller 2 and the lower crimping roller 3 rotate towards each other to cooperate in conveying the filament bundle forward.

[0027] When the upper cutter holder 5 flips downward relative to the lower cutter holder 4 until the upper crimping cutter 10 is inserted into the groove to form a crimping channel, the upper crimping roller 2 flips downward along with the upper cutter holder 5 and presses onto the lower crimping roller 2, so that the upper crimping roller 2 and the lower crimping roller 3 can cooperate to transport the filament bundle; when the upper cutter holder 5 flips upward relative to the lower cutter holder 4 until the upper crimping cutter 10 moves upward away from the groove to open the crimping channel, the upper crimping roller 2 also flips upward along with the upper cutter holder 5 and moves away from the lower crimping roller 3, so that it is easier to clean the broken filaments located between the upper crimping roller 2 and the lower crimping roller 3;

[0028] Before the curling operation, the left and right positions of the upper curling knife mounting base 9 in the long groove are adjusted simultaneously by adjusting the length of the side tightening bolts 14 on both sides into the long groove. This adjusts the left and right position of the upper curling knife 10 in the upper knife holder until the upper curling knife 10 corresponds to the groove. After the upper curling knife 10 is adjusted, the upper curling knife mounting base 9 inserted into the long groove is tightened against the stop block 13 by the front tightening bolt 16 to position the upper curling knife mounting base 9 in the long groove in the front and back direction, thereby positioning the upper curling knife 10 in the front and back direction.

[0029] Then, the piston rods of each lower lifting cylinder 22 are retracted downwards. When the piston rods of the lower lifting cylinder 22 retract downwards, they drive the upper knife holder 5 to flip downwards relative to the lower knife holder 4 until the front end of the upper knife holder 5 presses down on the positioning post 26, at which point the action of the lower lifting cylinder 22 stops. When the upper knife holder 5 flips downwards, it will simultaneously drive the upper curling roller 2, the upper curling knife mounting seat and the upper curling knife 10 to flip downwards together. When the front end of the upper knife holder 5 presses down on the positioning post 26, the upper curling roller 2 flips down with the upper knife holder 5 and presses down on the lower curling roller 2, so that the upper curling roller 2 and the lower curling roller 3 can cooperate to convey the filament bundle. At the same time, the upper curling knife 10 is inserted downwards into the groove so that the upper curling knife 10, the lower curling knife 6 and the side plates 7 together form a curling channel.

[0030] Next, the piston rod of the upper lifting cylinder 17 extends downward, causing the upper coiling blade 10 to rotate downward relative to the upper coiling blade mounting seat 9 until the upper coiling blade 10 and the lower coiling blade 6 form a working angle.

[0031] During the fiber crimping process, the motor drives the lower crimping roller 3 to rotate. After the lower crimping roller 3 rotates, it cooperates with the upper crimping roller 2 to feed the uniformly thick filament bundle, which has been preheated by steam, forward into the crimping channel. As the upper crimping roller 2 and the lower crimping roller 3 continuously feed the filament bundle into the crimping channel, the upper crimping knife 10 generates resistance to the movement of the filament bundle, thus causing the fiber to crimp in the crimping channel. Furthermore, due to the pushing action of the upper crimping roller 2 and the lower crimping roller 3, the crimped filament bundle is continuously pushed out of the crimping channel.

[0032] When a filament breaks and needs to be cleaned in the curling channel, the piston rod of the upper lifting cylinder 17 is first retracted upwards, causing the upper curling knife 10 to flip upwards relative to the upper curling knife mounting seat 9 and reset. Then, the piston rods of each lower lifting cylinder 22 are extended upwards. When the piston rods of the lower lifting cylinder 22 extend upwards, they cause the upper knife seat 5 to flip upwards relative to the lower knife seat 4, simultaneously causing the upper curling roller 2, the upper curling knife mounting seat, and the upper curling knife 10 to flip upwards together. This not only causes the upper curling roller 2 to flip upwards and move away from the lower curling roller 3 to more easily clean the broken filament located between the upper curling roller 2 and the lower curling roller 3, but also causes the upper curling knife 10 to flip upwards and disengage from the groove to open the curling channel and facilitate the cleaning of the broken filament in the curling channel.

[0033] The advantages of this utility model are: it is easy to operate and use, has high stability, and can easily clean broken wires, saving time and effort.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A fiber crimping machine characterized by: The device comprises a conveying unit and a curling unit arranged in the frame in sequence along the conveying direction of the tow, the conveying unit is used to feed the tow into the curling unit, the curling unit comprises a lower knife holder and an upper knife holder, the lower knife holder is fixedly installed on the frame, a lower curling knife is installed on the lower knife holder, side plates are respectively installed on the left and right ends of the lower curling knife, the lower curling knife and the two side plates form a groove for the tow to pass through, the upper knife holder is located above the lower knife holder, the rear end of the upper knife holder is hinged to the lower knife holder through a rotating shaft, an upper curling knife mounting seat is arranged in the upper knife holder, the upper curling knife mounting seat is installed on the upper knife holder through a position adjusting mechanism, an upper curling knife is arranged on the bottom of the upper curling knife mounting seat and corresponds to the groove, the rear end of the upper curling knife is hinged to the rear end of the bottom of the upper curling knife mounting seat, the front end of the upper curling knife is connected to the upper curling knife mounting seat or the upper knife holder through an upper curling knife turnover driving mechanism, the upper curling knife turnover driving mechanism can make the upper curling knife turn over to a working inclination angle with the lower curling knife, the front end of the upper knife holder is connected to the frame through an upper knife holder turnover mechanism, the upper knife holder turnover mechanism can drive the upper knife holder to turn over downward relative to the lower knife holder to make the upper curling knife insert into the groove so that the upper curling knife, the lower curling knife and the two side plates jointly form a curling channel, and the upper knife holder turnover mechanism can also drive the upper knife holder to turn over upward relative to the lower knife holder to make the upper curling knife upwardly separate from the groove to open the curling channel.

2. A fibre crimping machine according to claim 1, characterised in that: The structure of the position adjusting mechanism comprises: two L-shaped mounting plates are fixedly arranged on the bottom of the upper knife holder and located on the left and right sides of the upper curling knife mounting seat, the L-shaped mounting plates are composed of horizontal plates and vertical plates and have an L-shaped structure, the two L-shaped mounting plates are arranged in a horizontal plate opposite mode, the two L-shaped mounting plates and the upper knife holder jointly form a long groove for the upper curling knife mounting seat to be movably embedded, a stop block is arranged on the rear end of each L-shaped mounting plate and used for abutting against the upper curling knife mounting seat inserted into the long groove, a plurality of first threaded holes are respectively arranged on the vertical plates of the two L-shaped mounting plates and extend through the vertical plates in the left-right direction, a side clamping bolt is respectively screwed in each first threaded hole, each side clamping bolt extends into the long groove along the corresponding first threaded hole and abuts against the corresponding side wall of the upper curling knife mounting seat to position the upper curling knife mounting seat in the left-right direction in the long groove, a front mounting plate is detachably arranged on the front end of the upper knife holder and located in front of the upper curling knife mounting seat inserted into the long groove, a plurality of second threaded holes are arranged on the front mounting plate and extend through the front mounting plate in the front-rear direction, a front clamping bolt is screwed in each second threaded hole, and the front clamping bolt clamps the upper curling knife mounting seat inserted into the long groove against the stop block to position the upper curling knife mounting seat in the front-rear direction in the long groove.

3. A fibre crimping machine according to claim 2, characterised in that: The front end of the upper curling knife is connected to the upper knife seat through an upper curling knife turnover driving mechanism, and the structure of the upper curling knife turnover driving mechanism comprises: an upper lifting and lowering cylinder, the cylinder body of the upper lifting and lowering cylinder is hingedly connected to the upper knife seat through a first pin shaft, the piston rod of the upper lifting and lowering cylinder is downwardly fixed with a connecting head, the connecting head is provided with a left-right through connecting hole, two ear plates are fixed on the top of the front end of the upper curling knife and arranged oppositely, and a connecting shaft is supported between the two ear plates, the connecting head at the end of the piston rod of the upper lifting and lowering cylinder is arranged between the two ear plates, and the connecting shaft is movably arranged through the connecting hole of the connecting head, and the spacing between the two ear plates can ensure that the upper curling knife can move leftward and rightward relative to the upper lifting and lowering cylinder when the upper curling knife is adjusted in position leftward and rightward relative to the upper curling knife mounting seat.

4. A fiber crimping machine according to claim 1, characterized in that: The structure of the upper knife seat turnover mechanism comprises: two lower lifting and lowering cylinders distributed on the left and right sides of the lower knife seat, the cylinder body of each lower lifting and lowering cylinder is fixed vertically to the frame, the piston rod of each lower lifting and lowering cylinder is upwardly hingedly connected to the lower end of a connecting rod through a second pin shaft, and the upper end of the connecting rod is hingedly connected to the front end of the upper knife seat through a third pin shaft, all the second pin shafts are coaxially arranged, all the third pin shafts are coaxially arranged, and the piston rods of the lower lifting and lowering cylinders can drive the upper knife seat to turn upward relative to the lower knife seat through the connecting rods when the piston rods of the lower lifting and lowering cylinders are simultaneously extended upward, and the piston rods of the lower lifting and lowering cylinders can drive the upper knife seat to turn downward relative to the lower knife seat through the connecting rods when the piston rods of the lower lifting and lowering cylinders are simultaneously retracted downward.

5. A fibre crimping machine according to claim 4, characterised in that: A positioning column is arranged on the left and right sides of the lower knife seat to position the downwardly turned position of the upper knife seat, and when the upper knife seat is turned downward and the front end is pressed on the positioning column, the upper curling knife is inserted into the groove and cooperates with the lower curling knife and the side plates to form a curling channel.

6. A fibre crimping machine according to any one of claims 1 to 5, characterised in that: The conveying unit comprises upper curling rollers and lower curling rollers arranged vertically, the upper curling rollers are movably supported on the upper knife seat, the lower curling rollers are movably supported on the lower knife seat, the upper curling rollers and the lower curling rollers are driven to rotate by a driving mechanism to convey the fiber, when the upper knife seat is turned downward relative to the lower knife seat and the upper curling knife is inserted into the groove to form a curling channel, the upper curling rollers are turned downward with the upper knife seat to press on the lower curling rollers, so that the upper curling rollers and the lower curling rollers can convey the fiber, and when the upper knife seat is turned upward relative to the lower knife seat and the upper curling knife is separated upward from the groove to open the curling channel, the upper curling rollers are also turned upward with the upper knife seat to be separated from the lower curling rollers.

7. A fibre crimping machine according to claim 6, characterised in that: The structure of the driving mechanism comprises: the upper curling rollers are driven to rotate by an upper motor mounted on the upper knife seat, the lower curling rollers are driven to rotate by a lower motor mounted on the lower knife seat, and the upper motor and the lower motor drive the upper curling rollers and the lower curling rollers to rotate toward each other to convey the fiber forward.

8. A fiber crimping machine according to claim 6, characterized in that: The structure of the driving mechanism comprises: a motor and a speed reducer are mounted on the lower knife seat, an upper driving shaft and a lower driving shaft are supported in the speed reducer and arranged vertically, an upper gear is sleeved on the shaft body of the upper driving shaft, a lower gear is sleeved on the shaft body of the lower driving shaft, the upper gear is engaged with the lower gear, the output shaft of the motor is connected with the lower gear, the shaft end of the upper driving shaft is connected with the shaft end of the upper curling roller through a universal joint, and the shaft end of the lower driving shaft is connected with the shaft end of the lower curling roller through a universal joint.

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