A high efficiency drafting system with apron and a spinning method

Abstract

The application provides a high-efficiency apron drafting spinning device and a spinning method. The device comprises three drafting roller pairs of front, middle and rear which are driven separately. The lower roller set of the rear drafting roller pair comprises a driving lower roller and several passive driven lower rollers. A lower apron is sleeved on the lower roller set, and an upper apron is sleeved on the top roller. A linear reinforced ladder friction field with a plane structure is formed between the upper and lower aprons, so that the stable internal friction field of the short fiber roving enters into the drafting system, and the uniform and large drafting effect in the rear drafting area is realized. A certain number of middle passive driven control lower rollers and corresponding top rollers are arranged in the front part of the lower roller of the middle drafting roller pair, and lower and upper aprons are arranged on the lower roller and the top roller respectively, so that the plane friction control field with the elastic linear nip friction field is realized, the concentrated and large drafting in the front drafting area is realized, and the high-efficiency large drafting of the drafting system is realized, and the comprehensive quality of the yarn and the product added value are improved.

Description

Technical Field

[0001] This invention relates to the field of spinning technology, and in particular to a high-efficiency drafting spinning device and spinning method using a rubber apron. Background Technology

[0002] Fancy yarns refer to yarns with special structures and appearances obtained by processing fibers or yarns using special raw materials, equipment, or processes during spinning and yarn making. They are a type of yarn product with a decorative function. Fancy yarns are characterized by their unique structure, flexible shapes, rich color expression, diverse raw material usage, and creativity. These factors facilitate the innovation of fancy yarn products, leading to the production of more differentiated textile products. In today's era of personalized consumption, the market has given fancy yarns a broad space. Drafting is the most important step in fine yarn production. During drafting, fibers are gradually drawn out one by one from the surrounding fiber group. Due to mutual friction, hooks are gradually eliminated, and crimps are gradually straightened. In this way, the lateral connections remaining within each fiber can be completely eliminated, creating conditions for firmly establishing a regular end-to-end connection. Therefore, effective control of fibers during the drafting process is an important condition for achieving excellent drafting results.

[0003] During drafting, the control force generated on the fibers originates from friction, including external friction generated by the drafting element in contact with the fibers, and internal friction formed by the intertwining of fibers. Internal friction is mainly controlled by the twist of the fed roving, while external friction is primarily generated by the drafting element. The key to improving drafting efficiency and yarn quality lies in setting appropriate drafting elements to generate a corresponding external friction field, thereby controlling fiber movement during drafting. Currently, conventional drafting systems use upper and lower aprons on the upper and lower rollers of the middle drafting roller pair. These aprons, pressing against each other, create an external friction field within the front drafting zone, controlling fiber movement and achieving a large drafting effect in the front drafting zone. However, the friction field distribution within this apron structure is relatively uniform and cannot better adapt to the varying friction requirements during drafting. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency drafting spinning device and spinning method with a rubber apron to solve the problems in the prior art. By setting a rubber apron structure in the drafting system, a planar friction control force field with a certain number of elastic linear nip friction fields is realized, thereby realizing the corresponding control of the fibers in the drafting zone, achieving high-efficiency large drafting of the drafting system, and improving the overall quality of yarn and the added value of the product.

[0005] In a first aspect, the present invention provides a high-efficiency drafting spinning device with a rubber apron, including a drafting system. The drafting system includes a rear trapezoidal plane friction field with a certain length of planar structure. The rear end of the rear trapezoidal plane friction field is a rear gripping continuous conveying straight jaw, and the front end is a rear gripping continuous output straight jaw. A certain number of rear gripping continuous input straight jaws are distributed between the two.

[0006] A planar friction field of a certain length is formed by a stepped plane. The rear end of the stepped plane friction field is a continuous input straight jaw with a grip, and the front end is a continuous input straight jaw with a elastic grip. A certain number of continuous input straight jaws with an elastic grip are distributed between the two.

[0007] A linear jaw with a front grip for continuous output.

[0008] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the number of back-grip continuous input straight nipples is between 1 and 2.

[0009] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the number of medium-elastic continuous conveying straight nipples is between 1 and 3.

[0010] In the above-described high-efficiency drafting spinning device with rubber aprons, preferably, the rotational linear speeds of the rear gripping continuous output linear jaw, the rear gripping continuous input linear jaw, and the rear gripping continuous conveying linear jaw are kept consistent.

[0011] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the rotational linear speeds of the central gripping continuous input linear jaw, the central elastic continuous input linear jaw, and the central elastic continuous conveying linear jaw are kept consistent.

[0012] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the rear drafting zone is formed between the rear gripping continuous output straight nip and the middle gripping continuous input straight nip.

[0013] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the front drafting zone is formed between the middle gripping continuous input straight nip and the front gripping continuous output straight nip.

[0014] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the frictional force field of the rear ladder plane is formed by the direct contact and pressing of the fixedly supported rubber apron from top to bottom.

[0015] In the above-described high-efficiency drafting spinning device with a rubber apron, preferably, the middle gripping continuous input straight jaw of the middle trapezoidal plane friction field is formed by the direct contact and pressing of the upper and lower rubber aprons with fixed support, and the other parts of the middle trapezoidal plane friction field are formed by the direct contact and pressing of the lower elastic support and the upper fixed support rubber aprons with direct contact and pressing.

[0016] Secondly, the present invention provides a method for high-efficiency drafting spinning using a rubber apron, utilizing the aforementioned high-efficiency drafting spinning device using a rubber apron.

[0017] During spinning, the desired short fiber roving wound on the roving tube is fed into the drafting system. At this time, the short fiber roving is first directly gripped and input by the continuous input straight jaws of the rear gripping system. Then, under the control of the rear ladder plane friction field, the short fiber roving is flattened and rubbed straight by the plane friction field of the rear ladder plane friction field at the non-rear line friction control field. Then, it is pressed and shaped in turn at the rear line friction control field of the rear ladder plane friction field, thereby realizing the intermittent flattening, straightening and pressing and shaping of the short fiber roving in the rear ladder plane friction field. Finally, the short fiber roving, which is flat and has a stable internal friction field, is gripped by the continuous output straight jaws of the rear gripping system and enters the rear drafting zone.

[0018] In the post-drafting zone, the short-fiber roving is first directly gripped by the continuous input straight jaws of the middle grip. Within the post-drafting zone formed by the continuous output straight jaws of the rear grip and the continuous input straight jaws of the middle grip, it undergoes drafting to produce a fiber sliver with reduced linear density. At this point, because the short-fiber roving is relatively flat and possesses a stable internal friction field, the short fibers within the cross-section of the roving are distributed in a near-two-dimensional planar manner within the post-drafting zone. This allows the near-two-dimensional planar distribution of short fibers within the cross-section of the roving to continuously and stably enter the one-dimensional straight line at the continuous input straight jaws of the middle grip, which directly and continuously connects to the two-dimensional plane, thus achieving short fiber density reduction. The short fibers in the roving are stably accelerated at the continuous input straight jaws of the center grip. Then, under the control of the plane friction field of the center ladder, the fiber sliver is flattened and rubbed straight by the plane friction field of the center ladder plane friction field at the non-center line friction control field. Then, it is elastically pressed at the center line friction control field of the center ladder plane friction field. Under the elastic pressing, the fibers in the fiber sliver are stably conveyed forward at the same linear velocity as the continuous input straight jaws of the center grip. Finally, the fiber sliver, which is flat and has a stable internal friction field, is gripped by the continuous output straight jaws of the center grip and enters the front drafting zone.

[0019] In the pre-drawing zone, the fiber sliver is directly gripped and output by the front gripping continuous output straight jaws. In the pre-drawing zone formed between the middle gripping continuous output straight jaws and the front gripping continuous output straight jaws, it is stretched to obtain a fiber ribbon with reduced linear density. At this time, because the fiber sliver is flat and has a stable internal friction field, the short fibers in the cross-section of the fiber sliver are completely distributed in a two-dimensional plane in the pre-drawing zone. This allows the short fibers in the cross-section of the fiber sliver, which are completely distributed in a two-dimensional plane, to continuously and stably enter the one-dimensional straight line at the front gripping continuous output straight jaws that are directly and continuously connected to the two-dimensional plane. Under the combined control of the stable internal friction field of the fiber sliver and the friction field of the middle ladder plane, a certain number of fibers in the fiber sliver are directly and continuously pulled out by the front gripping continuous output straight jaws, resulting in a fiber ribbon with a two-dimensional plane distribution and no twist. In the output fiber ribbon, the short fibers are arranged in a straight line without any cross-cutting.

[0020] The fiber belt output from the drafting system is twisted by the twisting system of the spinning frame to obtain fine yarn. The fine yarn is wound around the spinning tube in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate via the spindle belt, which in turn drives the spinning tube to rotate. The rotation of the spinning tube then drives the fine yarn to pass through the guide hook and the traveler in sequence and wind onto the spinning tube. This causes the traveler to rotate around the ring. At this time, due to the flexible structure of the fine yarn and the weight of the traveler itself, the rotation speed of the traveler is less than the rotation speed of the spinning tube. The speed difference between the two causes the fine yarn to be continuously wound onto the spinning tube. At the same time, the rotation of the traveler causes the fine yarn to rotate axially, which in turn generates twist on the fine yarn. The generated twist is transmitted from bottom to top. When it is transmitted to the twisting point, the fiber belt is twisted at the twisting point under the action of the transmitted twist to obtain the final fine yarn.

[0021] Compared with the prior art, the present invention employs three separately driven drafting roller pairs (front, middle, and rear). The rear drafting roller pair includes a lower roller group and an upper roller group. The lower roller group includes an active lower roller with a roller sleeve fixedly connected to the roller shaft via a drive shaft and several passive lower rollers with roller sleeves connected to the roller shaft bearings. By placing lower rubber rings on the active and passive lower rollers and upper rubber rings on the corresponding upper rollers, a trapezoidal frictional force field with a certain length of planar structure containing equally spaced straight reinforcing ribs is formed between the upper and lower rubber rings. This achieves the flattening, straightening, and pressing and setting of the fed short fiber roving before it enters the drafting system, thus making the short fiber roving... The yarn enters the drafting system with a stable internal friction field, enabling the short fiber roving to achieve uniform large drafting in the back drafting zone under the control of the stable internal friction field. By setting a certain number of passively driven lower rollers and corresponding top rollers at the front of the middle drafting roller, and setting middle and lower rubber rings on each lower roller and middle and upper rubber rings on the corresponding top rollers, a planar friction control field with a certain number of elastic linear nip friction fields is achieved. This allows the fiber to achieve concentrated ultra-large drafting in the front drafting zone under the comprehensive control of the stable internal friction field and the external planar friction control field, thereby achieving efficient large drafting of the drafting system, improving the overall quality of the yarn and the added value of the product. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the high-efficiency drafting spinning device with a rubber apron of the present invention;

[0023] Figure 2 This is a schematic diagram of the front support structure of the present invention.

[0024] Explanation of reference numerals in the attached diagram: 1 - Short fiber roving; 2 - Rear active lower roller; 3 - Rear active upper roller; 4 - Middle active lower roller; 5 - Middle active upper roller; 6 - Front active lower roller; 7 - Front active upper roller; 8 - Rear drive shaft; 9 - Rear passive lower roller; 10 - Rear passive upper roller; 11 - Middle passive lower roller; 12 - Middle passive upper roller; 13 - Drive roller shaft; 14 - Drive roller sleeve; 15 - Passive roller shaft; 16 - Passive roller sleeve; 17 - Roller shaft; 18 - Roller sleeve; 19 - Rear lower apron; 20 - Rear lower elastic tension frame; 21 - Rear upper apron. 22 - Upper rear elastic tension frame, 23 - Lower middle rubber ring, 24 - Lower middle elastic tension frame, 25 - Upper middle rubber ring, 26 - Upper middle elastic tension frame, 27 - Yarn guide hook, 28 - Yarn tube, 29 - Steel wire traveler, 30 - Steel ring, 31 - First servo motor, 32 - Second servo motor, 33 - Third servo motor, 34 - Programmable logic controller, 35 - Front support seat, 36 - Embedded groove, 37 - Left front sliding groove, 38 - Left rear sliding groove, 39 - Right front sliding groove, 40 - Right rear sliding groove, 41 - Lifting support assembly, 42 - Lifting rod, 43 - Telescopic spring, 44 - Left connecting nut, 45 - Right connecting nut. Detailed Implementation

[0025] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] This invention provides a high-efficiency drafting spinning method using a rubber apron. By setting a rubber apron structure within the drafting system, a planar friction control force field with a certain number of elastic linear nip friction fields is achieved, thereby enabling corresponding control of the fibers within the drafting zone. This results in highly efficient drafting of the drafting system, improving the overall quality of the yarn and the added value of the product.

[0027] Reference Figure 1 and Figure 2 As shown, the high-efficiency drafting spinning device with a rubber apron includes a drafting system, which includes three rows of drafting roller pairs: a rear roller drafting pair consisting of a rear lower roller group and a rear upper roller group; a middle roller drafting pair consisting of a middle active drive lower roller 4 and a middle active drive upper roller 5; and a front roller drafting pair consisting of a front active drive lower roller 6 and a front active drive upper roller 7. The rear lower roller group includes one rear active drive lower roller 2 and a certain number of rear passive drive lower rollers 9. The number of rear passive drive lower rollers 9 is between 1 and 2. The rear passive drive lower rollers 9 are located behind the rear active drive lower roller 2. A certain number of middle passive control lower rollers 11 are arranged in front of the middle active drive lower roller 4. The number of middle passive control lower rollers 11 is between 1 and 3.

[0028] The rear active-driven lower roller 2, the middle active-driven lower roller 4, and the front active-driven lower roller 6 all include an active roller shaft 13, which is made of iron or steel. An active roller sleeve 14 is fitted onto the active roller shaft 13, and the active roller sleeve 14 is made of the same material as the active roller shaft 13. The active roller sleeve 14 and the active roller shaft 13 are integrally fixedly connected. The rear passive-driven lower roller 9 and the middle passive-controlled lower roller 11 include a passive roller shaft 1. 5. The passive roller shaft 15 is made of iron or steel. A passive roller sleeve 16 is fitted on the passive roller shaft 15. The passive roller sleeve 16 is made of the same material as the passive roller shaft 15. The passive roller sleeve 16 and the passive roller shaft 15 are connected by a bearing, so that the passive roller sleeve 16 can rotate freely around the passive roller shaft 15. The active roller sleeve 14 of the intermediate active drive lower roller 4 and the passive roller sleeve 16 of the intermediate passive control lower roller 11 have the same diameter.

[0029] The active roller sleeve 14 of the rear active lower roller 2 and the passive roller sleeve 16 of the rear passive lower roller 9 have the same diameter. A rear drive shaft 8 is provided between the active roller sleeve 14 of the rear active lower roller 2 and the adjacent passive roller sleeve 16 of the rear passive lower roller 9, as well as between the adjacent passive roller sleeve 16 of the rear passive lower roller 9. The diameter of the rear drive shaft 8 is smaller than the diameter of the active roller sleeve 14 of the rear active lower roller 2 and the passive roller sleeve 16 of the rear passive lower roller 9. The rear drive shaft 8 is in close contact with the active roller sleeve 14 of the rear active lower roller 2 and the adjacent passive roller sleeve 16 of the rear passive lower roller 9, thereby realizing the transmission connection between the rear active lower roller 2 and the adjacent rear passive lower roller 9, or the rear drive shaft 8 is in close contact with the passive roller sleeve 16 of the adjacent rear passive lower roller 9, thereby realizing the transmission connection between the adjacent rear passive lower roller 9.

[0030] A rear lower rubber ring 19 is fitted on the rear lower roller assembly. The rear lower rubber ring 19 is made of rubber and passes over the active roller sleeve 14 of the rear active lower roller 2, the passive roller sleeve 16 of the rear passive lower roller 9 located at the rearmost side, and the rear lower elastic tension frame 20. The rear lower elastic tension frame 20 is located directly below the rear passive lower roller 9 at the rearmost part. A middle lower rubber ring 23 is fitted on the middle active lower roller 4. The middle lower rubber ring 23 is made of rubber and passes over the active roller sleeve 14 of the middle active lower roller 4, the passive roller sleeve 16 of each middle passive lower roller 11, and the middle lower elastic tension frame 24. The middle lower elastic tension frame 24 is located directly below the middle active lower roller 4.

[0031] The drive roller shafts 13 of the rear active drive lower rollers 2 of the 16 spindles on the front table of the spinning frame are integrated. The drive roller shafts 13 of two adjacent rear active drive lower rollers 2 are connected by a drive transmission through a rear roller seat. The drive roller shafts 13 of the middle active drive lower rollers 4 of the 10 spindles are integrated. The drive roller shafts 13 of two adjacent middle active drive lower rollers 4 are connected by a drive transmission through a middle roller seat. The drive roller shafts 13 of the front active drive lower rollers 6 of the 4 spindles are integrated. The drive roller shafts 13 of two adjacent front active drive lower rollers 6 are connected by a drive transmission through a front roller seat. The passive roller shafts 15 of the middle passive control lower rollers 11 of the 10 spindles are integrated. The passive roller shafts 15 of the rear passive drive lower rollers 9 of all spindles are integrated. The rear drive shafts 8 of all spindles are integrated.

[0032] The drive roller shafts 13 of the rear active drive lower rollers 2 of the 16 spindles on the rear table of the spinning frame are integrated. The drive roller shafts 13 of two adjacent rear active drive lower rollers 2 are connected by a rear roller seat. The drive roller shafts 13 of the middle active drive lower rollers 4 of the 10 spindles are integrated. The drive roller shafts 13 of two adjacent middle active drive lower rollers 4 are connected by a middle roller seat. The drive roller shafts 13 of the front active drive lower rollers 6 of the 4 spindles are integrated. The drive roller shafts 13 of two adjacent front active drive lower rollers 6 are connected by a front roller seat. The passive roller shafts 15 of the middle passive control lower rollers 11 of the 10 spindles are integrated. The passive roller shafts 15 of the rear passive drive lower rollers 9 of all spindles are integrated. The rear drive shafts 8 of all spindles are integrated.

[0033] A front support seat 35 is provided at the front of the middle roller seat. The rear of the front support seat 35 is fixedly connected to the middle roller seat. An embedding groove 36 is provided on the front support seat 35. The number of embedding grooves 36 is the same as the number of the passively controlled lower roller 11. The embedding groove 36 is a cuboid structure and passes through the front support seat 35. A left sliding groove group and a right sliding groove group are provided in the embedding groove 36. The left sliding groove group includes a left front sliding groove 37 and a left rear sliding groove 38. The right sliding groove group includes a right front sliding groove 39 and a right rear sliding groove 40. A lifting support assembly 41 is provided in the left front sliding groove 37, left rear sliding groove 38, right front sliding groove 39, and right rear sliding groove 40. The lifting support assembly 41 includes a lifting rod 42 and a telescopic spring 43. The lower end of the lifting rod 42 is fixedly connected to the lower side of the corresponding sliding groove. The telescopic spring 43 is sleeved on the... On the lifting rod 42, a left connecting nut 44 is provided between the upper ends of the lifting rod 42 in the left front sliding groove 37 and the left rear sliding groove 38. The left connecting nut 44 is fixedly connected to the upper ends of the lifting rod 42 in the left front sliding groove 37 and the left rear sliding groove 38 respectively. A right connecting nut 45 is provided between the upper ends of the lifting rod 42 in the right front sliding groove 39 and the right rear sliding groove 40 respectively. The right connecting nut 45 is fixedly connected to the upper ends of the lifting rod 42 in the right front sliding groove 39 and the right rear sliding groove 40 respectively. External threads are provided on the outer surfaces of both ends of the middle passive control roller 11. The external thread at the left end of the middle passive control roller 11 is screwed into the right connecting nut 45 of the right sliding groove group of the corresponding front support seat 35, and the external thread at the right end is screwed into the left connecting nut 44 of the left sliding groove group of the corresponding front support seat 35.

[0034] The rear upper rubber roller assembly includes one rear active upper rubber roller 3 and a certain number of rear passive upper rubber rollers 10. The rear active upper rubber roller 3 is located directly above the rear active lower roller 2. The number of rear passive upper rubber rollers 10 is the same as the number of rear passive lower rollers 9, and each rear passive upper rubber roller 10 is located directly above its corresponding rear passive lower roller 9. The middle active upper rubber roller 5 is located directly above the middle active lower roller 4. A middle passive control upper rubber roller 12 is arranged directly above each middle passive control lower roller 11. The number of middle passive control upper rubber rollers 12 is the same as the number of middle passive control lower rollers 9. The number of lower rollers 11 is the same. The front active drive upper rubber roller 7 is located directly above the front active drive lower roller 6. The rear active drive upper rubber roller 3, the rear passive drive upper rubber roller 10, the middle active drive upper rubber roller 5, the middle passive control upper rubber roller 12, and the front active drive upper rubber roller 7 have the same structure, including a rubber roller shaft 17. The rubber roller shaft 17 is made of iron or steel. A rubber roller sleeve 18 is fitted on the rubber roller shaft 17. The rubber roller sleeve 18 is a solid annular sleeve made of rubber. The rubber roller sleeve 18 is rolledly connected to the rubber roller shaft 17 through a bearing, so that the rubber roller sleeve 18 can rotate freely around the rubber roller shaft 17.

[0035] A rear upper rubber ring 21 is fitted on the rear upper rubber roller assembly. The rear upper rubber ring 21 is made of rubber. The rear upper rubber ring 21 passes over the rubber roller sleeve 18 of the rear active driving upper rubber roller 3, the rubber roller sleeve 18 of each rear passive driving upper rubber roller 10, and the rear upper elastic tension frame 22. The rear upper elastic tension frame 22 is located directly above the rear lower elastic tension frame 20 at the rear end. The rear upper elastic tension frame 22 is set on the pressure assembly. A middle upper rubber ring 25 is fitted on the middle active driving upper rubber roller 5. The middle upper rubber ring 25 is made of rubber. The middle upper rubber ring 25 passes over the rubber roller sleeve 18 of the middle active driving upper rubber roller 5, the rubber roller sleeve 18 of each middle passive control upper rubber roller 12, and the middle upper elastic tension frame 26. The middle upper elastic tension frame 26 is located directly above the middle active driving upper rubber roller 5. The middle upper elastic tension frame 26 is set on the pressure assembly.

[0036] A spindle on the front table and a spindle on the left side of the spinning frame form a spindle group. A spindle on the rear table and a spindle on the right side of the spinning frame form a spindle group. Within a spindle group, the right end of the roller shaft 17 of the rear active upper rubber roller 3 and the rear passive upper rubber roller 10 of the left spindle extends out of the rubber roller sleeve 18, and the right ends of the roller shaft 17 extending out of the rubber roller sleeve 18 are fixedly connected by a left rear connecting rod. Within a spindle group, the roller shafts of the rear active upper rubber roller 3 and the rear passive upper rubber roller 10 of the right spindle also form a spindle group. The left end of shaft 17 extends out of rubber roller sleeve 18, and the left end of rubber roller shaft 17 extending out of rubber roller sleeve 18 is fixedly connected to the right rear connecting rod. The left rear connecting rod and the right rear connecting rod are fixedly connected to each other by a rear embedded shaft. The middle part of the rear embedded shaft is embedded in the rear embedded gripper of the pressure assembly, thereby realizing the connection of the rear upper rubber roller group on the pressure assembly. In a spindle group, the right end of the rubber roller shaft 17 of the middle active drive upper rubber roller 5 and the middle passive control upper rubber roller 12 of the left spindle extends out of rubber roller sleeve 18, and the right end of the rubber roller shaft 17 extending out of rubber roller sleeve 18 is fixedly connected to the right rear connecting rod. The right ends are fixedly connected by a left-middle connecting rod. The left end of the roller shaft 17 of the right spindle position in a spindle group, which actively drives the upper rubber roller 5 and passively controls the upper rubber roller 12, extends out of the rubber roller sleeve 18. The left ends of the roller shaft 17 extending out of the rubber roller sleeve 18 are fixedly connected by a right-middle connecting rod. The left-middle connecting rod and the right-middle connecting rod are fixedly connected by a middle embedded shaft. The middle part of the middle embedded shaft is embedded in the middle embedded gripper of the pressure assembly, thus realizing the connection of the upper and middle rubber roller groups on the pressure assembly. The left spindle position in a spindle group... The front active drive upper rubber roller 7 and the right spindle position front active drive upper rubber roller 7 are integrally fixedly connected, and the rubber roller sleeve 18 of the front active drive upper rubber roller 7 on the left spindle position and the rubber roller sleeve 18 of the front active drive upper rubber roller 7 on the right spindle position maintain a certain distance. The rubber roller shaft 17 between the rubber roller sleeve 18 of the front active drive upper rubber roller 7 on the left spindle position and the rubber roller sleeve 18 of the front active drive upper rubber roller 7 on the right spindle position is embedded in the front embedded gripper of the pressure assembly, thereby realizing the connection of the front active drive upper rubber roller 7 on the pressure assembly.

[0037] The drive roller shaft 13 of the rear drive lower roller 2 is driven to rotate by the first servo motor 31, the drive roller shaft 13 of the middle drive lower roller 4 is driven to rotate by the second servo motor 32, and the drive roller shaft 13 of the front drive lower roller 6 is driven to rotate by the third servo motor 33. The first servo motor 31, the second servo motor 32, and the third servo motor 33 are all connected to the programmable logic controller 34.

[0038] The present invention provides a high-efficiency drafting spinning method using a rubber apron. In use, the pressure assembly is first pressed down, causing the lower rear rubber apron 19 and the upper rear rubber apron 21 to directly contact each other, thus forming a rear contact plane of a certain length between the lower rear rubber apron 19 and the upper rear rubber apron 21. Simultaneously, the active roller sleeve 14 of the lower rear active roller 2 and the rubber roller sleeve 18 of the upper rear active rubber roller 3 achieve close pressing contact through the covering upper rear rubber apron 21 and the lower rear rubber apron 19, respectively, thus forming a rear gripping output linear jaw at the foremost part of the rear contact plane. Similarly, the passive roller sleeve 16 of the lower rear passive roller 9 and the rubber roller sleeve 18 of the upper rear passive rubber roller 10 achieve close pressing contact through the covering upper rear rubber apron 21 and the lower rear rubber apron 19, respectively, thus forming a rear gripping input linear jaw at the rearmost part of the rear contact plane. Equally spaced rear gripping conveying linear jaws are formed between the rear gripping output linear jaws and the rear gripping input linear jaws on the rear contact plane.

[0039] Simultaneously, the lower middle rubber ring 23 and the upper middle rubber ring 25 are in direct contact with each other, thus forming a middle contact plane of a certain length between the lower middle rubber ring 23 and the upper middle rubber ring 25. At the same time, the active roller sleeve 14 of the active lower roller 4 and the rubber roller sleeve 18 of the active upper rubber roller 5 are in close pressing contact through the covered upper middle rubber ring 25 and the lower middle rubber ring 23, thus forming a middle gripping input linear jaw at the rear of the middle contact plane. The passive roller sleeve 16 of the passive lower roller 11 and the rubber roller sleeve 18 of the passive upper rubber roller 12 are in close pressing contact through the covered upper middle rubber ring 25 and the lower middle rubber ring 23, thus forming a middle elastic output linear jaw at the front of the middle contact plane. Between the middle gripping input linear jaw and the middle elastic output linear jaw on the middle contact plane, a middle elastic conveying linear jaw is formed with equal spacing.

[0040] At the same time, the active roller sleeve 14 of the front active drive lower roller 6 and the rubber roller sleeve 18 of the front active drive upper rubber roller 7 are directly pressed into contact, thereby forming a front gripping output linear jaw directly between the two.

[0041] The first servo motor 31 drives the drive roller shaft 13 of the rear active drive lower roller 2 to rotate, which in turn drives the drive roller sleeve 14 of the rear active drive lower roller 2 to rotate. The rotation of the drive roller sleeve 14 of the rear active drive lower roller 2 then drives the passive roller sleeve 16 of the adjacent rear passive drive lower roller 9 to rotate around the passive roller shaft 15 through the rear drive shaft 8 in close contact with it. The rotation of the passive roller sleeve 16 of the rear passive drive lower roller 9 then drives each of the rear passive drive rollers in turn through the rear drive shaft 8 in close contact with it. The passive roller sleeve 16 of the lower roller 9 rotates around the passive roller shaft 15, and the rotation speed and direction of all the passive roller sleeves 16 of the rear passive roller 9 are consistent with the rotation speed and direction of the active roller sleeve 14 of the rear active roller 2. This drives the rear lower rubber ring 19 to rotate. At the same time, the rotation of the active roller sleeve 14 of the rear active roller 2 drives the rear upper rubber ring 21, which is in close contact with it, to rotate through the rear lower rubber ring 19 it covers. This, in turn, drives the rubber roller sleeve of the rear active upper rubber roller 3. The roller sleeves 18 of the upper roller 10 rotate around the roller shaft 17, thereby causing the rear gripping output linear jaw to change into a rear gripping continuous output linear jaw, the rear gripping input linear jaw to a rear gripping continuous input linear jaw, and the rear gripping conveying linear jaw to a rear gripping continuous conveying linear jaw. A rear friction control force field with a certain length of planar structure is formed between the rotating rear lower ring 19 and the rear upper ring 21. At the same time, a linear rear linear friction control force field is formed in the rear gripping continuous output linear jaw, the rear gripping continuous input linear jaw, and the rear gripping continuous conveying linear jaw within the rear friction control force field. Since each rear linear friction control force field is formed by the corresponding mutually fixed and pressed lower roller and upper roller, the rear linear friction control force field is greater than the friction force field of other parts of the rear friction control force field. Thus, a rear trapezoidal planar friction force field containing equally spaced linear reinforcing ribs is formed between the rotating rear lower ring 19 and the rear upper ring 21.

[0042] The second servo motor 32 drives the active roller shaft 13 of the middle active lower roller 4 to rotate, which in turn drives the active roller sleeve 14 of the middle active lower roller 4 to rotate, which in turn drives the middle lower rubber ring 23 through the sleeve to rotate. The rotation of the middle lower rubber ring 23 then drives the passive roller sleeve 16 of each of the middle passive control lower rollers 11 through the sleeve to rotate. The rotation of the middle lower rubber ring 23 simultaneously drives the middle upper rubber ring 25, which is in close contact with it, to rotate. The rotation of the middle upper rubber ring 25 then drives the rubber roller sleeve 18 of the middle active upper rubber roller 5 and each of the middle passive control upper rubber rollers 12 through the sleeve to rotate. This causes the middle grip input linear jaw to change to a middle grip continuous input linear jaw, the middle elastic input linear jaw to change to a middle elastic continuous input linear jaw, and the middle elastic conveying linear jaw to change to a middle elastic continuous conveying linear jaw. Between the rotating lower and upper rubber rings 23 and 25, a planar friction control force field of a certain length is formed. Simultaneously, within the planar friction control force field, the center grip continuous input linear jaw, the center elastic continuous input linear jaw, and the center elastic continuous conveying linear jaw respectively form a linear friction control force field. Since the center grip continuous input linear jaw is formed by the corresponding mutually fixed pressing lower roller and upper rubber roller, and the center elastic continuous input linear jaw and the center elastic continuous conveying linear jaw are formed by the corresponding mutually elastic pressing lower roller and upper rubber roller, the linear friction control force field is greater than the friction force field of other parts of the planar friction control force field. Thus, a planar friction force field containing equally spaced linear reinforcing ribs is formed between the rotating lower and upper rubber rings 23 and 25.

[0043] The third servo motor 33 drives the active roller shaft 13 of the front active lower roller 6 to rotate, which in turn drives the active roller sleeve 14 of the front active lower roller 6 to rotate, which in turn drives the rubber roller sleeve 18 of the front passive upper rubber roller that is in close contact to rotate around the rubber roller shaft 17, thereby changing the front gripping output linear jaw into the front gripping continuous output linear jaw, and forming a front linear friction control force field with a linear structure within the front gripping continuous output linear jaw.

[0044] During spinning, the desired short fiber roving 1, wound on the roving tube, is fed into the drafting system. At this time, the short fiber roving 1 is first directly gripped by the continuously input straight jaws of the rear gripper and enters between the rear lower roller group and the rear upper rubber roller group of the rear roller drafting pair. Then, under the control of the rear ladder plane friction field between the rear lower roller group and the rear upper rubber roller group of the rear roller drafting pair, the short fiber roving 1 is flattened and rubbed straight under the plane friction field of the rear ladder plane friction field at the non-rear line friction control field. Then, it is pressed and shaped in sequence at the rear line friction control field of the rear ladder plane friction field, thereby realizing the intermittent flattening, straightening and pressing and shaping of the short fiber roving 1 in the rear ladder plane friction field. Finally, the short fiber roving 1, which is flat and has a stable internal friction field, is gripped by the continuously output straight jaws of the rear gripper and enters the rear drafting zone.

[0045] At this point, within the back drafting zone, the short-fiber roving 1 is first directly gripped by the continuous input straight jaws of the middle gripping roller and enters the middle roller drafting pair between the middle active drive lower roller 4 and the middle active drive upper roller 5. Within the back drafting zone formed by the continuous output straight jaws of the back gripping roller and the continuous input straight jaws of the middle gripping roller, it undergoes drafting action, resulting in a fiber sliver with reduced linear density. Because the short-fiber roving 1 is relatively flat and possesses a stable internal friction field, the short fibers within the cross-section of the short-fiber roving 1 are distributed in a near-two-dimensional planar manner within the back drafting zone. This allows the near-two-dimensional planar distribution of short fibers within the cross-section of the short-fiber roving 1 to continuously and stably enter the middle gripping roller, which directly and continuously connects with the two-dimensional plane. The input straight line at the one-dimensional straight line of the straight line jaws enables the short fibers in the short fiber roving 1 to achieve stable speed change at the continuous input straight line jaws in the center grip. Then, under the control of the central ladder plane friction field, the fiber sliver is flattened and rubbed straight by the plane friction field of the central ladder plane friction field at the non-center line friction control field. Then, it is elastically pressed at the center line friction control field of the central ladder plane friction field. Under the elastic pressing action, the fibers in the fiber sliver are stably conveyed forward at the same linear speed as the continuous input straight line jaws in the center grip. Finally, the fiber sliver, which is flat and has a stable internal friction field, is gripped by the continuous output straight line jaws in the center grip and enters the front drafting zone.

[0046] In the pre-drafting zone, the fiber sliver is directly gripped and output by the front gripping continuous output straight jaws. In the pre-drafting zone formed between the middle gripping continuous output straight jaws and the front gripping continuous output straight jaws, it is stretched to obtain a fiber ribbon with reduced linear density. At this time, because the fiber sliver is flat and has a stable internal friction field, the short fibers in the cross-section of the fiber sliver are completely distributed in a two-dimensional plane in the pre-drafting zone. This allows the short fibers in the cross-section of the fiber sliver, which are completely distributed in a two-dimensional plane, to continuously and stably enter the one-dimensional straight line at the front gripping continuous output straight jaws that are directly and continuously connected to the two-dimensional plane. Under the combined control of the stable internal friction field of the fiber sliver and the friction field of the middle ladder plane, a certain number of fibers in the fiber sliver are directly and continuously pulled out by the front gripping continuous output straight jaws, resulting in a fiber ribbon with a two-dimensional plane distribution and no twist. In the output fiber ribbon, the short fibers are arranged in a straight line without any intersection.

[0047] The fiber belt output from the drafting system is twisted by the twisting twist system of the spinning frame to obtain fine yarn. The fine yarn is wound around the spinning tube 28 in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate via the spindle belt, which in turn drives the spinning tube 28 to rotate. The rotation of the spinning tube 28 then drives the fine yarn to pass through the guide hook 27 and the traveler 29 in sequence and wind onto the spinning tube 28. This causes the traveler 29 to rotate around the ring 30. At this time, because the fine yarn is... The flexible structure and the weight of the traveler 29 itself cause the traveler 29 to rotate at a speed lower than that of the spinning tube 28. The speed difference between the two causes the yarn to be continuously wound on the spinning tube 28. At the same time, the rotation of the traveler 29 causes the yarn to rotate axially, which in turn adds twist to the yarn. The added twist is transmitted from bottom to top. When it reaches the twisting point, the fiber belt is twisted at the twisting point under the action of the transmitted twist to obtain the final yarn.

[0048] Implementation effect analysis:

[0049] Using roving with a dry basis weight of 5.325 g / 10m, a blend ratio of T / JC 65 / 35, and a twist coefficient of 81.4 as raw material, and employing traditional spinning methods, fine yarn with a linear density of 42S (dry basis weight 1.36 g / 100m) and a twist coefficient of 330 was processed. At this stage, a lower long apron was installed on the middle and lower rollers of the drafting system, and an upper short apron was installed on the middle and upper rubber rollers. Simultaneously, the high-efficiency drafting spinning device and spinning method of this patent were used to process the corresponding fine yarn. During the processing, the designed mechanical draft was 40.986, and the actual draft was 39.268, with a back zone draft of 1.12 and a front zone draft of 36.59. The designed spindle speed was 16000 r / min. The quality of the processed fine yarn was tested, and the test results are as follows:

[0050] Results of yarn strength, weight, and twist tests

[0051]

[0052] Yarn evenness and hairiness test results

[0053]

[0054] The test results clearly show that compared with the traditional drafting method, the high-efficiency drafting spinning device and spinning method of this patent can effectively improve the uniformity of the yarn, including unevenness in short segments, unevenness in weight in long segments, and unevenness in strength. This is because the patent uses a high-efficiency finishing device with a rubber ring, which achieves uniform finishing of the internal friction field generated by twist during the drafting process, and at the same time provides a more stable external friction field for fiber movement, making the distribution of speed change points more stable and concentrated during the drafting process.

[0055] Simultaneously, the high-efficiency drafting spinning device and spinning method of this patent were used to process fine yarn with a linear density of 120S (dry weight 0.486g / 100m) and a twist coefficient of 340. During the processing, the designed mechanical draft was 112.245, and the actual draft was 109.567, with a back zone draft of 2.0 and a front zone draft of 56.12. The designed spindle speed was 12000r / min, and the quality of the processed fine yarn was tested. The test results are as follows:

[0056] Results of yarn strength, weight, and twist tests

[0057]

[0058] Yarn evenness and hairiness test results

[0059]

[0060] As can be seen from the test results, the high-efficiency drafting spinning device and spinning method of this patent can effectively achieve the large drafting effect of the drafting system, and the back zone drafting ratio is set to 2, which means that the back zone has a large drafting, and the processing of fine yarn with excellent overall quality is achieved.

[0061] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A high-efficiency drafting spinning device with a rubber apron, comprising a drafting system, characterized in that: The drawing system includes a rear stepped plane friction field of a certain length of planar structure. The rear end of the rear stepped plane friction field is a rear gripping continuous conveying linear jaw, and the front end is a rear gripping continuous output linear jaw. A certain number of rear gripping continuous input linear jaws are distributed between the two. A planar friction field of a certain length is formed by a stepped plane. The rear end of the stepped plane friction field is a continuous input straight jaw with a grip, and the front end is a continuous input straight jaw with a elastic grip. A certain number of continuous input straight jaws with an elastic grip are distributed between the two. A linear jaw with a front grip for continuous output linear clamping; The rear gripping continuous output linear jaws and the middle gripping continuous input linear jaws form the rear draw zone; The middle grip continuous input linear jaws and the front grip continuous output linear jaws form the front draw zone; The central grip of the continuous input linear jaws in the middle trapezoidal plane friction field is formed by the direct contact and pressing of the upper and lower rubber rings of the fixed support. The other parts of the middle trapezoidal plane friction field are formed by the direct contact and pressing of the lower elastic support and the upper fixed support rubber rings.

2. The high-efficiency drafting spinning device with a rubber apron according to claim 1, characterized in that: The number of consecutive input linear jaws held after gripping is between 1 and 2.

3. The high-efficiency drafting spinning device with a rubber apron according to claim 1, characterized in that: The number of jaws in a medium-elastic continuous conveyor is between 1 and 3.

4. The high-efficiency drafting spinning device with a rubber apron according to claim 1, characterized in that: The rotational linear speeds of the rear grip continuous output linear jaw, the rear grip continuous input linear jaw, and the rear grip continuous feed linear jaw remain consistent.

5. The high-efficiency drafting spinning device with a rubber apron according to claim 1, characterized in that: The rotational linear speeds of the medium-grip continuous input linear jaw, the medium-elastic continuous input linear jaw, and the medium-elastic continuous conveying linear jaw remain consistent.

6. The high-efficiency drafting spinning device with a rubber apron according to claim 1, characterized in that: The frictional force field on the rear ladder plane is formed by the direct contact and pressing of the fixed support rubber ring from above and below.

7. A method for high-efficiency drafting spinning using a rubber apron, comprising the high-efficiency drafting spinning apparatus of any one of claims 1 to 6, characterized in that: During spinning, the desired short fiber roving wound on the roving tube is fed into the drafting system. At this time, the short fiber roving is first directly gripped and input by the continuous input straight jaws of the rear gripping system. Then, under the control of the rear ladder plane friction field, the short fiber roving is flattened and rubbed straight by the plane friction field of the rear ladder plane friction field at the non-rear line friction control field. Then, it is pressed and shaped in turn at the rear line friction control field of the rear ladder plane friction field, thereby realizing the intermittent flattening, straightening and pressing and shaping of the short fiber roving in the rear ladder plane friction field. Finally, the short fiber roving, which is flat and has a stable internal friction field, is gripped by the continuous output straight jaws of the rear gripping system and enters the rear drafting zone. In the post-drafting zone, the short-fiber roving is first directly gripped by the continuous input straight jaws of the middle grip. Within the post-drafting zone formed by the continuous output straight jaws of the rear grip and the continuous input straight jaws of the middle grip, it undergoes drafting to produce a fiber sliver with reduced linear density. At this point, because the short-fiber roving is relatively flat and possesses a stable internal friction field, the short fibers within the cross-section of the roving are distributed in a near-two-dimensional planar manner within the post-drafting zone. This allows the near-two-dimensional planar distribution of short fibers within the cross-section of the roving to continuously and stably enter the one-dimensional straight line at the continuous input straight jaws of the middle grip, which directly and continuously connects to the two-dimensional plane, thus achieving short fiber density reduction. The short fibers in the roving are stably accelerated at the continuous input straight jaws of the central grip. Then, under the control of the central ladder plane friction field, the fiber sliver is flattened and rubbed straight by the plane friction field of the central ladder plane friction field at the non-central line friction control field. Then, it is elastically pressed at the central line friction control field of the central ladder plane friction field. Under the elastic pressing, the fibers in the fiber sliver are stably conveyed forward at the same linear velocity as the continuous input straight jaws of the central grip. Finally, the fiber sliver, which is flat and has a stable internal friction field, is gripped by the central elastic continuous input straight jaws and enters the front drafting zone. In the pre-drafting zone, the fiber sliver is directly gripped and output by the front gripping continuous output straight jaws. In the pre-drafting zone formed between the middle gripping continuous input straight jaws and the front gripping continuous output straight jaws, it is stretched to obtain a fiber ribbon with reduced linear density. At this time, because the fiber sliver is flat and has a stable internal friction field, the short fibers in the cross-section of the fiber sliver are completely distributed in a two-dimensional plane in the pre-drafting zone. This allows the short fibers in the cross-section of the fiber sliver, which are completely distributed in a two-dimensional plane, to continuously and stably enter the one-dimensional straight line at the front gripping continuous output straight jaws that are directly and continuously connected to the two-dimensional plane. Under the combined control of the stable internal friction field of the fiber sliver and the friction field of the middle ladder plane, a certain number of fibers in the fiber sliver are directly and continuously pulled out by the front gripping continuous output straight jaws, resulting in a fiber ribbon with a two-dimensional plane distribution and no twist. In the output fiber ribbon, the short fibers are arranged in a straight line without any intersection. The fiber belt output from the drafting system is twisted by the twisting system of the spinning frame to obtain fine yarn. The fine yarn is wound around the spinning tube in a clockwise or counterclockwise direction. During this process, the main motor drives all the spindles to rotate via the spindle belt, which in turn drives the spinning tube to rotate. The rotation of the spinning tube then drives the fine yarn to pass through the guide hook and the traveler in sequence and wind onto the spinning tube. This causes the traveler to rotate around the ring. At this time, due to the flexible structure of the fine yarn and the weight of the traveler itself, the rotation speed of the traveler is less than the rotation speed of the spinning tube. The speed difference between the two causes the fine yarn to be continuously wound onto the spinning tube. At the same time, the rotation of the traveler causes the fine yarn to rotate axially, which in turn generates twist on the fine yarn. The generated twist is transmitted from bottom to top. When it is transmitted to the twisting point, the fiber belt is twisted at the twisting point under the action of the transmitted twist to obtain the final fine yarn.

Images