Ultra-short viscose staple fiber cutting device and cutting method

Abstract

The invention relates to an ultra-short viscose staple fiber cutting-off device and method, the ultra-short viscose staple fiber cutting-off device comprises a fiber traction system, a fiber cutting-off system and an automatic control system, the fiber traction system is connected with the fiber cutting-off system in a working procedure, the fiber cutting-off system is arranged at the downstream of the fiber traction system in the working procedure, and the automatic control system is connected with the fiber traction system in the working procedure. The fiber traction system is used for straightening and guiding a fiber tow to the fiber cutting system, and the fiber cutting system is used for cutting the fiber tow; the automatic control system is used for collecting pressure data of multiple points on the fiber traction system and torque of a cutter head in the fiber cutting system. The automatic control system has the beneficial effects that synchronous action of the fiber traction system and the fiber cutting system can be accurately controlled through the automatic control system, it is ensured that fiber tows can be stably and accurately cut to the set length under the conditions of high speed and large tension, and the automatic control system is suitable for cutting operation of ultra-short viscose fibers, so that the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention relates to the field of viscose fiber equipment, and in particular to an ultra-short viscose staple fiber cutting device and a cutting method. Background Art

[0002] With the gradual upgrading of viscose fiber equipment technology, there are more and more product varieties and wider application fields. Among them, ultra-short fiber varieties account for a gradually increasing proportion in the viscose fiber industry and are widely used in the non-woven fabric field. The existing water flow cutting equipment is only suitable for the production of conventional viscose fibers, but it will cause large length deviations when used to cut ultra-short fibers, and the fibers are prone to contamination, so it is not suitable for cutting ultra-short viscose fibers. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an ultra-short viscose staple fiber cutting device and a cutting method to solve at least one technical problem mentioned in the background technology.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: an ultra-short viscose staple fiber cutting device, comprising: a fiber drawing system, a fiber cutting system and an automatic control system, wherein the fiber drawing system is connected to the fiber cutting system process, the fiber cutting system is arranged downstream of the process of the fiber drawing system, the fiber drawing system is used to straighten and guide the fiber bundle to the fiber cutting system, and the fiber cutting system is used to cut the fiber bundle;

[0005] The automatic control system is used to collect the rotational speed of the fiber traction machine in the fiber traction system, multi-point pressure data and the torque of the cutter disc in the fiber cutting system, and control the position of the tension roller in the fiber traction system based on the torque of the cutter disc, and adjust the rotational speed of the fiber traction machine in the fiber traction system and / or the position of the tension roller in the fiber traction system based on the pressure data.

[0006] The beneficial effects of the present invention are: through the automatic control system, the synchronous action of the fiber pulling system and the fiber cutting system can be accurately controlled to ensure that the fiber bundle can be stably and accurately cut to the set length under high speed and high tension conditions, which is suitable for the cutting operation of ultra-short viscose fibers, thereby improving production efficiency and product quality. At the same time, synchronous control of the fiber pulling system and the fiber cutting system helps to reduce uneven force and excessive wear of the blade during the cutting process, prolongs the service life of the blade, and reduces production costs; the automatic control system can adjust the action of the fiber pulling system and the fiber cutting system in real time according to the pressure data of multiple points on the fiber pulling system, maintain the uniform stretching state of the fiber bundle during the cutting process, and control the synchronous action of the fiber pulling system and the fiber cutting system, so that ultra-short viscose fibers with more stable and uniform quality can be produced.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the fiber pulling system comprises: the fiber pulling machine and the fiber drawing machine connected in sequence, the fiber pulling machine comprises: a pair of pulling machine rollers arranged up and down and spaced apart, the space between the pair of pulling machine rollers is used for the fiber bundle to pass through;

[0009] The fiber stretching machine comprises: a pair of stretching machine rollers arranged vertically and spaced apart, a tension roller and a guide roller, wherein the pair of stretching machine rollers are arranged close to the fiber traction machine, and the space between the pair of stretching machine rollers is used for the fiber bundle to pass through;

[0010] The tension roller and the guide roller are sequentially arranged at intervals on one side of the pair of stretcher rollers away from the fiber traction machine.

[0011] The beneficial effect of adopting the above further solution is that through the arrangement of a pair of stretching machine rollers, the fiber tow can be effectively straightened and stretched in the horizontal direction, thereby ensuring that the fiber maintains uniform tension during the stretching process and reducing fiber bending or knotting. The arrangement of the tension roller realizes the adjustment of the tension on the fiber tow.

[0012] Further, the pair of traction machine rollers and the pair of stretching machine rollers are arranged at the same height;

[0013] The fiber bundle passes through a pair of the stretcher rollers, below the tension roller, and above the guide roller in sequence and is constrained to form a "V" shape.

[0014] The beneficial effect of adopting the above further solution is that by arranging the traction machine roller and the stretching machine roller at the same height, it can be ensured that the fiber bundle is subjected to uniform stretching force when passing through the two roller groups.

[0015] Further, it also includes: a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is disposed between the fiber traction machine and the fiber drawing machine, and the first pressure sensor is used to collect the tension exerted on the fiber tow between the fiber traction machine and the fiber drawing machine;

[0016] The second pressure sensor is arranged on a side of the guide roller away from the tension roller, and the second pressure sensor is used to collect the tension applied to the fiber bundle between the fiber stretching machine and the fiber cutting system.

[0017] The beneficial effect of adopting the above further scheme is: by real-time monitoring of the tension of the fiber bundle between the fiber traction machine and the fiber stretching machine and between the fiber stretching machine and the fiber cutting system, the automatic control system can timely adjust the cylinder pressure of the tension roller and the rotation speed of the fiber traction machine to ensure that the tension of the fiber bundle during the stretching process is evenly distributed, and it also helps to maintain the stable stretching state of the fiber bundle before cutting, thereby improving the quality of the finished fiber. It also helps to reduce the downtime adjustment time during the production process and improve the overall production efficiency. The automatic control system with integrated pressure sensors enables the overall equipment to better adapt to fiber bundles of different materials and specifications, improving production flexibility and adaptability.

[0018] Further, the fiber cutting system comprises: a wire feeding device, a pressure plate, the knife disc and a dust prevention device, wherein the wire feeding device is arranged on a side of the knife disc close to the fiber drawing machine, and the wire feeding device is a chute, and a plurality of U-shaped limiters are arranged along the length direction of the chute, which are used to limit the movement of the fiber bundle along the U-shaped limiter to prevent the fiber bundle from deviating;

[0019] The pressure plate is arranged on one side of the knife disc, and is used to press the fiber bundle sideways and cooperate with the knife disc to cut the fiber bundle;

[0020] The dustproof device is arranged on the outer shell of the fiber cutting system and is used for discharging water vapor in the fiber cutting system.

[0021] The beneficial effects of adopting the above-mentioned further scheme are: the wire feeding device ensures that the fiber bundle can be accurately and stably introduced into the cutter disc through the chute and U-shaped limiter, reducing the deviation of the fiber bundle; the fiber bundle is cut off by the cooperation between the pressure plate and the cutter disc, making the cutting process more efficient and stable; the dustproof device effectively protects key components such as blades and columns from corrosion and damage by discharging water vapor in the system and preventing the entry of external impurities, thereby extending the service life of the equipment.

[0022] Furthermore, the cutter disc comprises: a cutter disc circular plate, a column, a transmission device, a blade and a drop bucket, wherein a pair of the cutter disc circular plates are arranged at intervals in the horizontal direction, and the pair of the cutter disc circular plates are connected by a plurality of columns arranged at intervals;

[0023] The middle part of the cutter disc plate located at the top is connected to the transmission device, and the cutter disc plate is driven to rotate through the transmission device;

[0024] A plurality of blades are evenly distributed radially between a pair of the blade disc circular plates, and the cutting edges of the blades are arranged away from the center of the blade disc circular plates;

[0025] The drop hopper is arranged on the lower end surface of the cutter disc circular plate located below.

[0026] The beneficial effects of adopting the above-mentioned further scheme are as follows: the blades are evenly distributed along the radial direction of the cutter disc and are evenly distributed at 360°, which effectively ensures the cutting efficiency and cutting length of the fiber bundle, and the installation and replacement of the blades are simple and convenient, and the setting of the transmission device ensures the stable rotation of the cutter disc; at the same time, the setting of the drop hopper enables the cut fibers to fall directly and smoothly into the drop hopper, which simplifies the subsequent fiber collection and processing work and improves the overall work efficiency; the overall structure of the cutter disc is compact and occupies little space.

[0027] Furthermore, the blade does not extend beyond the outer edge of the blade disc, and the spacing between the cutting edges on adjacent blades is adjusted according to the length of the finished fiber;

[0028] A plurality of the upright posts are evenly arranged at angles on the inner side of the blade; the upright posts are in the shape of hexagonal prisms, and the line connecting the two sharp corners of the hexagonal prism is parallel or colinear with the corresponding blade.

[0029] The beneficial effect of adopting the above further scheme is that the spacing between the cutting edges on adjacent blades can be adjusted according to the length of the finished fiber, ensuring that the arc length between the adjacent cutting edges is equal to the length of the finished fiber during the cutting operation, achieving precise cutting and meeting the strict requirements on the fiber length. At the same time, the spacing between the cutting edges on adjacent blades can be adaptively adjusted according to the length of the finished fiber, making the equipment more flexible and adaptable, and can be widely used in a variety of production needs. And due to the precise cutting, smooth material dropping and stable structure, the equipment can continuously and efficiently perform fiber cutting operations, thereby improving production efficiency.

[0030] Further, the pressure plate comprises: a pressure plate circular plate and a pressure plate shaft, the pressure plate circular plate rotates around the pressure plate shaft, and the thickness of the pressure plate circular plate does not exceed the spacing between a pair of the cutter disc circular plates;

[0031] The value range of the radial distance between one side of the pressure plate and one side of the cutter disc is 6-8 mm.

[0032] The beneficial effect of adopting the above-mentioned further scheme is: by applying pressure from the side of the pressure plate, the fiber bundle can be pressed tightly against the blade, thereby cooperating with the blade to cut the innermost fiber bundle, achieving fast and accurate cutting. The high-strength FR4 laminate material is used, which can withstand greater pressure and wear, ensuring the stability and reliability of the cutting process; and the pressure plate has a simple structure and is easy to disassemble, reducing maintenance costs and time.

[0033] Further, it also includes: a tension control system, which is installed inside the fiber stretching machine; the tension control system includes: a pneumatic control component and a cylinder, the pneumatic control component is electrically connected to the cylinder, the cylinder is connected to the roller shaft of the tension roller, and the tension roller is driven to move up and down by the cylinder;

[0034] The automatic control system is respectively connected to the first pressure sensor and the second pressure sensor for communication, and is respectively electrically connected to the fiber traction machine and the cutter disc, and is used to collect the torque of the cutter disc and control the pneumatic control component to drive the cylinder to move based on the torque of the cutter disc, and the torque of the cutter disc is inversely proportional to the tension of the tension roller;

[0035] The automatic control system is used to receive the pressure data collected by the first pressure sensor and the second pressure sensor and control the pneumatic control component to drive the cylinder movement and / or the rotational speed of the fiber traction machine based on the pressure data. The pressure data of the first pressure sensor is inversely proportional to the rotational speed of the fiber traction machine, and the pressure data of the second pressure sensor is inversely proportional to the cylinder stroke.

[0036] The beneficial effect of adopting the above further scheme is that through the coordinated work of the pneumatic control component and the cylinder, the up and down movement of the tension roller can be accurately controlled, thereby realizing the precise adjustment of the tension of the fiber bundle. The automatic control system adjusts the tension of the tension roller according to the preset cutter disc torque range and the torque data collected in real time, ensuring the stability during the production process. The pressure data of the fiber bundle at different positions is monitored in real time by the first pressure sensor and the second pressure sensor. The automatic control system can fine-tune the rotation speed of the traction machine roller and the cylinder stroke of the tension roller according to these data, thereby ensuring the uniformity and stability of the fiber bundle during the stretching and cutting process. The above control significantly improves the production efficiency and product quality.

[0037] Also disclosed is a method for cutting ultra-short viscose staple fibers, using the ultra-short viscose staple fiber cutting device described above, the method for cutting ultra-short viscose staple fibers comprises:

[0038] The post-treated fiber tow first enters between a pair of tractor rollers of a fiber tractor, and the pair of tractor rollers intercept the bath liquid entrained on the fiber tow and straighten the fiber tow;

[0039] The straightened fiber bundle enters the fiber drawing machine, passes through a pair of drawing machine rollers, a tension roller and a guide roller in sequence, and then enters the fiber cutting system;

[0040] The fiber bundle is wound on the rotating blade disc. As the number of turns of the fiber bundle wound on the outer edge of the blade on the blade disc increases, the pressure plate gradually contacts and presses on the outer side of the outermost circle of the fiber bundle, pressing the fiber bundle toward the cutting edge of the blade, and cutting off the innermost circle of the fiber bundle in contact with the cutting edge. The cut fibers fall from the drop hopper to obtain finished fibers.

[0041] As the cutter disc rotates continuously, new fiber bundles are continuously wound around the cutter disc, thereby achieving continuous cutting of the fiber bundles.

[0042] The beneficial effect of adopting the above further scheme is: through the cooperation of the fiber traction machine and the fiber stretching machine, it is ensured that the fiber bundle can be quickly straightened and enter the fiber cutting system after post-processing, and the bath liquid entrained on the fiber bundle is intercepted, avoiding the negative impact of the bath liquid on the cutting effect and fiber quality. The continuous rotation of the cutter disc allows new fiber bundles to be continuously wound around it, and the pressure plate gradually contacts and presses on the fiber bundles of the outermost circle, ensuring that the fiber bundles can be pressed smoothly and evenly against the edge of the blade, thereby realizing the continuous cutting of the fiber bundles, making the cutting more precise, the length consistency of the finished fiber is higher, the quality is more stable, and the production efficiency is greatly improved. The entire cutting process realizes mechanized and automated operation, reduces manual intervention, and reduces labor intensity; this method can adapt to the cutting needs of fiber bundles of different specifications and qualities by adjusting the parameters of equipment such as the fiber traction machine, the fiber stretching machine and the cutter disc, and has high flexibility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0044] Figure 2 It is a top view of the cutter disc and the pressure plate in one embodiment of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 1. Fiber traction system; 2. Fiber cutting system; 3. Automatic control system; 4. Fiber traction machine; 5. Fiber stretching machine; 6. First pressure sensor; 7. Cutter disc; 8. Pressure plate; 9. Drop hopper; 10. Blade; 11. Cylinder; 12. Tension roller; 13. Column; 14. Second pressure sensor; 15. Guide roller; 16. Dust prevention device. DETAILED DESCRIPTION

[0047] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0048] In the first aspect, the present invention provides an ultra-short viscose staple fiber cutting device, which is suitable for producing ultra-short viscose fibers of 5-15 mm, where ultra-short means the length is less than or equal to 15 mm, wherein the device specifically comprises: a fiber pulling system 1, a fiber cutting system 2 and an automatic control system 3, wherein the fiber pulling system 1 is process-connected with the fiber cutting system 2, and the fiber cutting system 2 is installed behind the fiber pulling system 1, and the fiber bundles pass through the fiber pulling system 1 and the fiber cutting system 2 in sequence, the fiber bundles are straightened by the fiber pulling system 1 and guided and transmitted to the fiber cutting system 2, and the fiber bundles are cut according to the set length by the fiber cutting system 2. During this process, the automatic control system 3 collects the rotation speed of the fiber traction machine 4 on the fiber traction system 1, the pressure data of multiple points and the torque of the knife disc 7 in the fiber cutting system 2, and adjusts the rotation speed of the fiber traction machine 4 in the fiber traction system 1 and / or the position of the tension roller 12 in the fiber traction system 1 based on the collected pressure data, and controls the position of the tension roller 12 in the fiber traction system 1 based on the torque of the knife disc 7, wherein the adjustment and control of the rotation speed of the fiber traction machine 4 and the tension roller 12 based on the pressure data can be performed simultaneously or at different times. Specifically, the torque of the knife disc 7 is adjusted by adjusting the tension of the tension roller 12, and the rotation speed of the fiber traction machine 4 in the fiber traction system 1 and / or the position of the tension roller 12 in the fiber traction system 1 are adjusted to keep the tension on the fibers at each point uniformly distributed, so that the fiber bundle is always in a stretched state, and at the same time, the fiber traction system 1 and the fiber cutting system 2 can be controlled to act synchronously to reduce the adverse effects of high speed and high tension on the use of the blade 10 in the fiber cutting system 2, and the uniform and continuous cutting of the ultra-short viscose fibers is achieved by controlling various parameters.

[0049] In this embodiment, the automatic control system 3 can accurately control the synchronous action of the fiber pulling system 1 and the fiber cutting system 2, ensuring that the fiber bundle can be stably and accurately cut to the set length under high speed and high tension conditions, which is suitable for the cutting operation of ultra-short viscose fibers, thereby improving production efficiency and product quality. At the same time, synchronously controlling the fiber pulling system 1 and the fiber cutting system 2 helps to reduce the uneven force and excessive wear of the blade 10 during the cutting process, prolongs the service life of the blade 10, and reduces production costs; the automatic control system 3 can adjust the action of the fiber pulling system 1 and the fiber cutting system 2 in real time according to the pressure data of multiple points on the fiber pulling system 1, maintain the uniform stretching state of the fiber bundle during the cutting process, and control the synchronous action of the fiber pulling system 1 and the fiber cutting system 2, so that ultra-short viscose fibers with more stable and uniform quality can be produced.

[0050] like Figure 1As shown, in a preferred embodiment, the fiber pulling system 1 includes: a fiber pulling machine 4 and a fiber drawing machine 5 connected in sequence, that is, the fiber drawing machine 5 is arranged behind the fiber pulling machine 4, and the fiber bundles after post-treatment pass through the fiber pulling machine 4 and the fiber drawing machine 5 in sequence. Specifically, the fiber pulling machine 4 includes: a pair of pulling machine rollers arranged up and down and arranged at intervals, and the interval between the pair of pulling machine rollers should ensure that the fiber bundles can pass through.

[0051] like Figure 1 As shown, the fiber stretching machine 5 includes: a pair of stretching machine rollers arranged vertically and spaced apart, a tension roller 12 and a guide roller 15. The pair of stretching machine rollers are arranged close to the fiber tractor 4, and the spacing between the pair of stretching machine rollers should ensure that the fiber bundle can pass through. The pair of stretching machine rollers and the pair of tractor rollers are arranged at the same height to ensure that the fiber bundle can enter the fiber stretching machine 5 horizontally from the fiber tractor 4, and the fiber bundle can also be further straightened. The tension roller 12 and the guide roller 15 are sequentially arranged at intervals on the side of the pair of stretching machine rollers away from the fiber tractor 4, wherein the tension roller 12 and the guide roller 15 are arranged in an up-and-down staggered manner, so that the fiber bundle is restricted to a "V" shape after passing through the pair of stretching machine rollers, the bottom of the tension roller 12 and the top of the guide roller 15 in sequence. The tension roller 12 is not arranged at the center of the distance between the pair of stretching machine rollers and the guide roller 15, but is arranged slightly close to the guide roller 15, and because the position of the tension roller 12 can be adjusted up and down, the opening angle of the fiber bundle restricted to a "V" shape is not fixed. The sizes of the traction machine roller, the stretching machine roller, the tension roller 12 and the guide roller 15 are set as required. The traction machine roller, the stretching machine roller, the tension roller 12 and the guide roller 15 are all driven by a driving device, which is not limited here.

[0052] In this embodiment, by setting a pair of stretching machine rollers, the fiber tow can be effectively straightened and stretched in the horizontal direction, thereby ensuring that the fiber maintains uniform tension during the stretching process and reducing fiber bending or knotting. The setting of the tension roller 12 realizes the adjustment of the tension on the fiber tow.

[0053] In this embodiment, it also includes: a first pressure sensor 6 and a second pressure sensor 14, wherein the first pressure sensor 6 is arranged between the fiber tractor 4 and the fiber stretcher 5, that is, the first pressure sensor 6 is located between a pair of tractor rollers and a pair of stretcher rollers, and the tension of the fiber bundle between the fiber tractor 4 and the fiber stretcher 5 is collected by the first pressure sensor 6. The second pressure sensor 14 is arranged on the side of the guide roller 15 away from the tension roller 12 and is arranged close to the guide roller 15, and the tension of the fiber bundle between the fiber stretcher 5 and the fiber cutting system 2 is collected by the second pressure sensor 14. The pressure data at different points are collected by the first pressure sensor 6 and the second pressure sensor 14, so as to adjust the pressure of the cylinder 11 connected to the tension roller 12 and the speed of the fiber tractor 4 according to the pressure data.

[0054] In this embodiment, by real-time monitoring of the tension of the fiber bundle between the fiber traction machine 4 and the fiber stretching machine 5 and between the fiber stretching machine 5 and the fiber cutting system 2, the automatic control system 3 can timely adjust the pressure of the cylinder 11 of the tension roller 12 and the rotation speed of the fiber traction machine 4 to ensure that the tension of the fiber bundle during the stretching process is evenly distributed, and also help to maintain the stable stretching state of the fiber bundle before cutting, thereby improving the quality of the finished fiber. It also helps to reduce the downtime adjustment time during the production process and improve the overall production efficiency. The automatic control system 3 with integrated pressure sensor enables the overall equipment to better adapt to fiber bundles of different materials and specifications, improving production flexibility and adaptability.

[0055] like Figure 1 As shown, in the preferred scheme, the fiber cutting system 2 includes: a wire feeding device, a pressure plate 8, a knife disc 7 and a dust prevention device 16, wherein the wire feeding device is arranged before the fiber cutting system 2, so that the fiber bundle after the fiber stretching machine 5 can be introduced into the knife disc 7 through the wire feeding device, that is, the wire feeding device plays a positioning role. In this embodiment, the wire feeding device adopts a chute, and a plurality of U-shaped stoppers are arranged along the length direction of the chute. The U-shaped stoppers can be ceramic parts. After the fiber stretching machine 5, the fiber bundle enters the chute and passes through the middle of the U-shaped stoppers arranged at intervals on the chute to prevent the fiber bundle from running off. The pressure plate 8 is arranged on one side of the knife disc 7. It can be imagined that the setting position of the pressure plate 8 should ensure that there is no interference with the wire feeding device. During the cutting process, the pressure plate 8 can press the fiber bundle wrapped on the knife disc 7 sideways to cooperate with the blade 10 on the knife disc 7 to cut the fiber bundle.

[0056] In addition, a dustproof device 16 is also provided on the outer shell of the fiber cutting system 2. The dustproof device 16 can specifically adopt an exhaust device to discharge water vapor in the fiber cutting system 2, avoid corrosion to the blade 10 and the column 13, and avoid the entry of external impurities; it can be imagined that the exhaust effect of the dustproof device 16 should avoid affecting the fibers and avoid blowing up the fibers to affect the cutting operation.

[0057] In this embodiment, the wire feeding device ensures that the fiber bundle can be accurately and stably introduced into the cutter disc 7 through the chute and the U-shaped limiter, thereby reducing the deviation of the fiber bundle; the fiber bundle is cut by the cooperation between the pressure plate 8 and the cutter disc 7, making the cutting process more efficient and stable; the dustproof device 16 effectively protects key components such as the blade 10 and the column 13 from corrosion and damage by discharging water vapor in the system and preventing the entry of external impurities, thereby extending the service life of the equipment.

[0058] like Figure 1 As shown, in the preferred solution, the cutter disc 7 includes: a cutter disc plate, a column 13, a transmission device, a blade 10 and a drop hopper 9. In this embodiment, a pair of cutter disc plates are provided, and the pair of cutter disc plates are arranged at intervals in the horizontal direction, and the pair of cutter disc plates are connected by a plurality of columns 13. The plurality of columns 13 are arranged at intervals between the pair of cutter disc plates, so that the pair of cutter disc plates are connected in a circular ring. The column 13 can be fixedly connected to the cutter disc plate by a fastener. During the working process, the pair of cutter disc plates rotate. In order to realize the above movement mode, in a feasible embodiment, a transmission device is connected to the middle part of the cutter disc plate located at the top, and the cutter disc plate is driven to rotate by the transmission device, so that the cutter disc 7 can rotate with the center of the upper and lower cutter disc plates as the axis; the transmission device can be but not limited to a motor. A drop hopper 9 is installed on the lower end surface of the cutter disc plate located at the bottom, and both sides of the drop hopper 9 are arranged at an angle of 45° downward, so that the cut fibers fall directly into the drop hopper 9.

[0059] In this embodiment, the blades 10 are installed between two cutter discs. Specifically, multiple groups of blades 10 are evenly distributed along the radial direction of the cutter disc, and the multiple groups of blades 10 are evenly distributed at 360 degrees, and the cutting edges of the blades 10 are arranged away from the center of the cutter disc. In the specific arrangement, a slot can be provided between a pair of cutter discs to install the blades 10, and the blades 10 can be directly installed in the slot.

[0060] In this embodiment, the blades 10 are evenly distributed along the radial direction of the cutter disc and are evenly distributed at 360°, which effectively ensures the cutting efficiency and cutting length of the fiber bundle, and the installation and replacement of the blades 10 are simple and convenient, and the setting of the transmission device ensures the stable rotation of the cutter disc 7; at the same time, the setting of the drop hopper 9 allows the cut fibers to fall directly and smoothly into the drop hopper 9, which simplifies the subsequent fiber collection and processing work and improves the overall work efficiency; the overall structure of the cutter disc 7 is compact and occupies little space.

[0061] Specifically, the blade 10 is arranged so as not to extend beyond the outer edge of the cutter disc, that is, the blade 10 is integrally located inside a pair of cutter discs. In the present embodiment, the spacing between the cutting edges on adjacent blades 10 is adjusted according to the length of the finished fiber, wherein the spacing between adjacent cutting edges is the arc length between adjacent cutting edges. When performing a cutting operation, the arc length between adjacent cutting edges is equal to the length of the finished fiber, and the length of the finished fiber is usually a multiple of 5 mm. Correspondingly, the distance between adjacent slots between a pair of cutter discs is just enough to allow the blade 10 to be installed on the cutting edge so as to cut into 5 mm long finished fibers. If a 10 mm long finished fiber is required, the blade 10 can be installed between a pair of cutter discs with one slot spaced therebetween. It is conceivable that the spacing between adjacent cutting edges can also be set according to the length of the desired finished fiber, and no further limitation is made here.

[0062] In this embodiment, if Figure 2 As shown, there are 4 columns 13, which are evenly arranged at an angle inside the blade 10, wherein the column 13 adopts a hexagonal prism, and its bottom surface is not a regular hexagon. In this embodiment, the line connecting the two sharp corners farthest from each other on the hexagonal prism is parallel or collinear with the corresponding blade 10 closest to it. In this embodiment, the installation position of the column 13 is closer to the blade 10, so the distance between the column 13 and the blade 10 is small. By improving the column 13 into a hexagonal prism, the two sides of the prism of the column 13 are sharp angles, which effectively increases the passing width of the fiber, ensures the smoothness of the blanking, and effectively solves the problem that when using columns 13 of other shapes such as cylinders or cuboids, the fibers are cut and accumulated between the column 13 and the blade 10, thereby causing the column 13 and the cutter disc to break at the connection. The column 13 structure with sharp angles on both sides effectively alleviates the structural fracture caused by the concentration of force.

[0063] In this embodiment, the spacing between the cutting edges on adjacent blades 10 can be adjusted according to the length of the finished fiber, ensuring that the arc length between the adjacent cutting edges is equal to the length of the finished fiber during the cutting operation, achieving precise cutting and meeting the strict requirements on the fiber length. At the same time, the spacing between the cutting edges on adjacent blades 10 is adaptively adjusted according to the length of the finished fiber, making the equipment more flexible and adaptable, and can be widely used in a variety of production needs. And due to the precise cutting, smooth material dropping and stable structure, the equipment can continuously and efficiently perform fiber cutting operations, thereby improving production efficiency.

[0064] Specifically, the pressure plate 8 includes: a pressure plate circular plate and a pressure plate shaft. The pressure plate circular plate can rotate around the pressure plate shaft. In practical applications, high-strength FR4 laminate material can be selected, and the thickness of the pressure plate circular plate must not exceed the spacing between a pair of cutter disc circular plates. The radial distance between one side of the pressure plate 8 and one side of the cutter disc 7 should be controlled at 6-8mm. When cutting the fiber, the side of the pressure plate 8 contacts with multiple circles of fiber bundles wrapped around the outer edge of the blade 10 on the cutter disc 7. As the number of circles of the wound fiber bundle increases, the pressure plate 8 gradually contacts the outermost circle of the fiber bundle and applies pressure from the side to make the fiber bundle contact with the blade. The blade cuts off the innermost fiber bundle, and the fiber bundle is continuously cut during the continuous rotation of the cutter disc 7.

[0065] In this embodiment, the fiber bundles can be tightly pressed against the blade by applying pressure from the side of the pressure plate 8, thereby cooperating with the knife disc 7 to cut off the innermost fiber bundles, achieving fast and accurate cutting. The high-strength FR4 laminate material is used, which can withstand greater pressure and wear, ensuring the stability and reliability of the cutting process; and the pressure plate 8 has a simple structure and is easy to disassemble, reducing maintenance costs and time.

[0066] In this embodiment, it also includes: a tension control system, wherein the tension control system is installed inside the fiber stretching machine 5. Specifically, the tension control system includes: a pneumatic control component and a cylinder 11, the pneumatic control component is electrically connected to the cylinder 11, the cylinder 11 is connected to the roller shaft of the tension roller 12, and the pneumatic control component controls the cylinder 11 to drive the tension roller 12 to move up and down. In this embodiment, the direction in which the tension roller 12 moves along the vertical direction toward the guide roller 15 is defined as the tension roller 12 moving upward.

[0067] The automatic control system 3 is communicatively connected with the first pressure sensor 6 and the second pressure sensor 14, and is electrically connected with the fiber traction machine 4 and the cutter disc 7 respectively, so that the automatic control system 3 collects the torque of the cutter disc 7 and the rotation speed of the fiber traction machine 4. The specific control process is: in the normal production process, the torque of the cutter disc 7 in the fiber cutting system 2 is preset. Theoretically, the torque of the cutter disc 7 needs to be in the range of 580-650Nm. Initially, a torque value of the cutter disc 7 is preset in this range, and the torque value is transmitted to the automatic control system 3. The automatic control system 3 determines the size of the torque of the cutter disc 7 collected in real time and the preset torque value of the cutter disc 7 based on the collected torque value of the cutter disc 7, wherein the torque is interlocked and inversely proportional to the tension of the tension roller 12. If the torque is too large, the tension of the tension roller 12 needs to be reduced, wherein the tension of the tension roller 12 is adjusted by the stroke of the cylinder 11, and the automatic control system 3 reduces the stroke of the cylinder 11 through the pneumatic control component to reduce the tension of the tension roller 12; and vice versa.

[0068] At the same time, the pressure data collected by the first pressure sensor 6 and the second pressure sensor 14 are also transmitted to the automatic control system 3. The pressure data collected by the first pressure sensor 6 must be kept within the range of 75-78 bar, and the pressure data collected by the second pressure sensor 14 must be kept within the range of 95-100 bar to ensure that the tension on the fiber bundle at this point is uniform. At the same time, the automatic control system 3 determines whether it is within the above range based on the pressure data of the first pressure sensor 6. The pressure data of the first pressure sensor 6 is interlocked and inversely proportional to the rotation speed of the traction machine roller. If the pressure is less than the range value, the rotation speed of the traction machine roller is slightly adjusted down. If the pressure is greater than the range value, the rotation speed of the traction machine roller is slightly adjusted up. The automatic control system 3 determines whether it is within the above range based on the pressure data of the second pressure sensor 14. The pressure data of the second pressure sensor 14 is interlocked and inversely proportional to the stroke of the cylinder 11 of the tension roller 12. If the pressure is less than the range value, the stroke of the cylinder 11 is slightly increased. If the pressure is greater than the range value, the stroke of the cylinder 11 is slightly reduced. In this embodiment, the process of adjusting based on the pressure data collected by the first pressure sensor 6 and the second pressure sensor 14 is a fine-tuning step.

[0069] In addition, during the normal production process, the fiber bundles must always be in a stretched state, and the fiber bundles must be kept in a taut state before entering the fiber cutting system 2. At the same time, in order to prevent the linear speed of the blade 10 on the cutter disc 7 from being too fast, which may cause the cut fibers to be easily shortened or curled in length, the linear speed of the fiber cutting system 2 is linked to the spinning speed of the spinning machine, and the linear speed of the blade 10 should be controlled to be 1.02-1.05 times the spinning speed of the spinning machine.

[0070] In this embodiment, the pneumatic control assembly and the cylinder 11 work together to accurately control the up and down movement of the tension roller 12, thereby achieving accurate adjustment of the tension of the fiber bundle. The automatic control system 3 adjusts the tension of the tension roller 12 according to the preset torque range of the cutter head 7 and the torque data collected in real time, ensuring stability during the production process. The pressure data of the fiber bundle at different positions is monitored in real time by the first pressure sensor 6 and the second pressure sensor 14. The automatic control system 3 can fine-tune the rotation speed of the traction machine roller and the stroke of the cylinder 11 of the tension roller 12 according to these data, thereby ensuring the uniformity and stability of the fiber bundle during the stretching and cutting process. The above control significantly improves production efficiency and product quality.

[0071] In the second aspect, a method for cutting ultra-short viscose staple fibers is also disclosed. The cutting method is implemented based on an ultra-short viscose staple fiber cutting device and specifically comprises the following steps:

[0072] The post-treated fiber bundle first enters between a pair of traction machine rollers of the fiber traction machine 4, and the bath liquid entrained on the fiber bundle is intercepted by the pair of traction machine rollers and the fiber bundle is straightened; then the straightened fiber bundle enters the fiber stretching machine 5, passes through a pair of stretching machine rollers, a tension roller 12 and a guide roller 15 in sequence, and then enters the fiber cutting system 2; thereafter, the fiber bundle is guided by the wire feeding device to be wound on the rotating cutter disc 7, and as the number of turns of the fiber bundle wound on the outer edge of the blade 10 on the cutter disc 7 increases, the pressure plate 8 gradually contacts and presses on the outside of the outermost circle of the fiber bundle, thereby pressing the fiber bundle toward the cutting edge of the blade 10, and first cuts off the innermost circle of the fiber bundle in contact with the cutting edge, and the cut fibers fall from the drop hopper 9 to obtain finished fibers; as the cutter disc 7 continues to rotate, new fiber bundles are continuously wound on the cutter disc 7, thereby continuously repeating the above steps to achieve continuous cutting of the fiber bundle.

[0073] In this process, the automatic control system 3 also adjusts and controls the cutting device as a whole, which will not be repeated here.

[0074] In the above steps, the cooperation of the fiber traction machine 4 and the fiber stretching machine 5 ensures that the fiber bundles can be quickly straightened and enter the fiber cutting system 2 after post-processing, and the bath liquid entrained on the fiber bundles is intercepted, avoiding the negative impact of the bath liquid on the cutting effect and fiber quality. The continuous rotation of the knife disc 7 allows new fiber bundles to be continuously wound on it, and the pressure plate 8 gradually contacts and presses on the fiber bundles of the outermost circle, ensuring that the fiber bundles can be pressed smoothly and evenly against the edge of the blade 10, thereby realizing the continuous cutting of the fiber bundles, making the cutting more precise, the length consistency of the finished fiber is higher, the quality is more stable, and the production efficiency is greatly improved. The entire cutting process realizes mechanized and automated operation, reduces manual intervention, and reduces labor intensity; this method can adapt to the cutting requirements of fiber bundles of different specifications and qualities by adjusting the parameters of equipment such as the fiber traction machine 4, the fiber stretching machine 5 and the knife disc 7, and has high flexibility and adaptability.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An ultra-short viscose staple fiber cutting device, characterized in that: include: A fiber pulling system (1), a fiber cutting system (2) and an automatic control system (3), wherein the fiber pulling system (1) is connected to the fiber cutting system (2) process, the fiber cutting system (2) is arranged downstream of the fiber pulling system (1) process, the fiber pulling system (1) is used to straighten and guide the fiber bundle to the fiber cutting system (2), and the fiber cutting system (2) is used to cut the fiber bundle; The automatic control system (3) is used to collect the rotation speed of the fiber pulling machine (4) in the fiber pulling system (1), multi-point pressure data and the torque of the knife disc (7) in the fiber cutting system (2), and control the position of the tension roller (12) in the fiber pulling system (1) based on the torque of the knife disc (7), and adjust the rotation speed of the fiber pulling machine (4) in the fiber pulling system (1) and / or the position of the tension roller (12) in the fiber pulling system (1) based on the pressure data.

2. The ultra-short viscose staple fiber cutting device according to claim 1, characterized in that: The fiber pulling system (1) comprises: the fiber pulling machine (4) and the fiber drawing machine (5) connected in sequence, the fiber pulling machine (4) comprising: a pair of pulling machine rollers arranged vertically and spaced apart, the space between the pair of pulling machine rollers being used for the fiber bundle to pass through; The fiber stretching machine (5) comprises: a pair of stretching machine rollers arranged vertically and spaced apart, a tension roller (12) and a guide roller (15), wherein the pair of stretching machine rollers are arranged close to the fiber traction machine (4), and the space between the pair of stretching machine rollers is used for the fiber bundle to pass through; The tension roller (12) and the guide roller (15) are sequentially arranged at intervals on one side of a pair of stretching machine rollers facing away from the fiber pulling machine (4).

3. The ultra-short viscose staple fiber cutting device according to claim 2, characterized in that: The pair of traction machine rollers and the pair of stretching machine rollers are arranged at the same height; The fiber bundle passes through a pair of stretcher rollers, the bottom of the tension roller (12) and the top of the guide roller (15) in sequence and is restricted to a "V" shape.

4. The ultra-short viscose staple fiber cutting device according to claim 3, characterized in that: Also includes: a first pressure sensor (6) and a second pressure sensor (14), wherein the first pressure sensor (6) is arranged between the fiber pulling machine (4) and the fiber stretching machine (5), and the first pressure sensor (6) is used to collect the tension applied to the fiber bundle between the fiber pulling machine (4) and the fiber stretching machine (5); The second pressure sensor (14) is arranged on the side of the guide roller (15) facing away from the tension roller (12), and the second pressure sensor (14) is used to collect the tension applied to the fiber bundle between the fiber stretching machine (5) and the fiber cutting system (2).

5. The ultra-short viscose staple fiber cutting device according to claim 4, characterized in that: The fiber cutting system (2) comprises: a wire feeding device, a pressure plate (8), the knife disc (7) and a dust prevention device (16); the wire feeding device is arranged on a side of the knife disc (7) close to the fiber stretching machine (5); the wire feeding device is a chute, and a plurality of U-shaped limiters are arranged along the length direction of the chute to limit the movement of the fiber bundle along the U-shaped limiters to prevent the fiber bundle from deviating; The pressure plate (8) is arranged on one side of the knife disc (7) and is used to press the fiber bundle sideways and cooperate with the knife disc (7) to cut the fiber bundle; The dust prevention device (16) is arranged on the outer shell of the fiber cutting system (2) and is used to discharge water vapor in the fiber cutting system (2).

6. The ultra-short viscose staple fiber cutting device according to claim 5, characterized in that: The cutter disc (7) comprises: a cutter disc circular plate, a column (13), a transmission device, a blade (10) and a drop bucket (9); a pair of the cutter disc circular plates are arranged at intervals in the horizontal direction, and the pair of the cutter disc circular plates are connected by a plurality of columns (13) arranged at intervals; The middle part of the cutter disc plate located at the top is connected to the transmission device, and the cutter disc plate is driven to rotate through the transmission device; A plurality of blades (10) are evenly distributed radially between a pair of the blade disc circular plates, and the cutting edges of the blades (10) are arranged in a direction away from the center of the blade disc circular plates; The drop hopper (9) is arranged on the lower end surface of the cutter disc circular plate located below.

7. The ultra-short viscose staple fiber cutting device according to claim 6, characterized in that: The blades (10) do not extend beyond the outer edge of the blade disc circular plate, and the spacing between the cutting edges on adjacent blades (10) is adjusted according to the length of the finished fiber; A plurality of the upright posts (13) are evenly arranged at angles on the inner side of the blade (10); the upright posts (13) are in the shape of a hexagonal prism, and the line connecting the two sharp corners of the hexagonal prism is parallel or colinear with the corresponding blade (10).

8. The ultra-short viscose staple fiber cutting device according to claim 5, characterized in that: The pressure plate (8) comprises: a pressure plate circular plate and a pressure plate shaft, the pressure plate circular plate rotates around the pressure plate shaft, and the thickness of the pressure plate circular plate does not exceed the spacing between a pair of the cutter disc circular plates; The value range of the radial distance between one side of the pressure plate (8) and one side of the cutter disc (7) is 6-8 mm.

9. The ultra-short viscose staple fiber cutting device according to claim 5, characterized in that: Also includes: A tension control system, the tension control system being installed inside the fiber stretching machine (5); The tension control system comprises: a pneumatic control component and a cylinder (11), the pneumatic control component is electrically connected to the cylinder (11), the cylinder (11) is connected to the roller shaft of the tension roller (12), and the tension roller (12) is driven to move up and down by the cylinder (11); The automatic control system (3) is respectively connected to the first pressure sensor (6) and the second pressure sensor (14) in communication, and is respectively electrically connected to the fiber pulling machine (4) and the cutter disc (7). The automatic control system (3) is used to collect the torque of the cutter disc (7) and control the pneumatic control component to drive the cylinder (11) to move based on the torque of the cutter disc (7). The torque of the cutter disc (7) is inversely proportional to the tension of the tension roller (12). The automatic control system (3) is used to receive the pressure data collected by the first pressure sensor (6) and the second pressure sensor (14) and control the pneumatic control component to drive the cylinder (11) to move and / or the rotation speed of the fiber pulling machine (4) based on the pressure data, wherein the pressure data of the first pressure sensor (6) is inversely proportional to the rotation speed of the fiber pulling machine (4), and the pressure data of the second pressure sensor (14) is inversely proportional to the stroke of the cylinder (11).

10. A method for cutting ultra-short viscose staple fibers, characterized in that: Using the ultra-short viscose staple fiber cutting device as described in any one of claims 5 to 9, the ultra-short viscose staple fiber cutting method includes: The post-treated fiber bundle first enters between a pair of traction rollers of a fiber traction machine (4), and the pair of traction rollers intercept the bath liquid entrained on the fiber bundle and straighten the fiber bundle; The straightened fiber bundle enters a fiber drawing machine (5), passes through a pair of drawing machine rollers, a tension roller (12) and a guide roller (15) in sequence, and then enters a fiber cutting system (2); The fiber bundle is wound on a rotating cutter disc (7), and as the number of turns of the fiber bundle wound on the outer edge of the blade (10) on the cutter disc (7) increases, the pressure plate (8) gradually contacts and presses on the outer side of the outermost circle of the fiber bundle, pressing the fiber bundle toward the edge of the blade (10), cutting off the innermost circle of the fiber bundle in contact with the edge, and the cut fibers fall from a drop hopper (9) to obtain finished fibers; As the cutter disc (7) continuously rotates, new fiber bundles are continuously wound around the cutter disc (7), thereby achieving continuous cutting of the fiber bundles.

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