Apparatus for producing a composite yarn and method of producing the same

Abstract

The application discloses a production device and a production method of composite yarn, and the production device comprises a front car table and a rear car table, a plurality of spindles are arranged at equal intervals along the front car table and the rear car table, the spindle comprises a drafting system and a filament feeding system, and the filament feeding system is located at the upper portion of the drafting system. The first filament and the second filament are actively controlled and fed at different speeds by adopting feeding rollers with different diameters, and then the tension of the first filament fed in the straight state for core-spun composite and the second filament fed in the curved state for wrap composite is cooperatively and uniformly controlled, the twist of the transmission is decomposed by arranging a twist resistance point in the front part of the front roller, and then the first filament fed firstly is wrapped with the drafted short fiber sliver and then wrapped with the second filament fed, so that the composite effect of the two filaments and the short fiber sliver is effectively improved, and the comprehensive quality of the formed yarn is improved.

Description

Technical Field

[0001] This invention relates to the field of spinning technology, and in particular to a composite yarn production apparatus and its production method. Background Technology

[0002] The spinning process is the final step in yarn production. It involves drafting and twisting the roving several times over to produce fine yarn with a specific count that meets relevant quality standards. The quality of the fine yarn ultimately determines the quality of the finished product. Simultaneously, the spinning process is one of the most crucial steps in a cotton textile mill. The size of a textile mill's production scale is expressed by the total number of spinning spindles. The output per spinning spindle reflects the production level of the textile enterprise. Indicators such as fine yarn quality, raw material and power consumption, and labor productivity reflect the technological and management level of the textile enterprise. The amount of energy consumed in the spinning process determines the cost of spinning, and the breakage rate per thousand spindles is a key performance indicator for enterprises.

[0003] With the application of new textile materials and the development of clothing fabrics towards casual and fashionable styles, structurally variable fashion yarns are gradually gaining market favor due to their unique fabric textures. Currently, structurally variable yarns spun using ring spinning include: slub yarns with axially varying yarn thickness, variegated yarns and AB yarns with axially varying yarn colors, and functional composite yarns made from simple combinations of filaments and staple fibers. However, the lack of variation in structure results in insufficient layering and three-dimensionality in the resulting fabrics, failing to meet consumers' demands for fashionable functionality and personalized customization. Among these, filament-staple fiber composite yarns effectively combine continuous filaments with shorter fibers, combining their advantages to achieve the production of yarns that possess both functionality and excellent wearing performance. For the production of composite yarn, tension control during the filament feeding process, especially the synchronous tension control during the double filament feeding process, is a difficult and crucial point. Currently, there is a coordination difference in the control of filaments, especially the tension control of the two filaments, in spinning. As a result, the state of the double filaments in the composite yarn cannot meet the actual requirements, which in turn leads to unevenness and other problems in the dyeing process of the subsequent fabric. Summary of the Invention

[0004] The purpose of this invention is to provide a composite yarn production apparatus and method to solve the problem of difficulty in synchronously controlling the tension during the feeding of dual filaments in the production of composite yarn.

[0005] This invention provides a composite yarn production apparatus, including a front machine platform and a rear machine platform, with a plurality of spindles evenly spaced along the front machine platform and the rear machine platform;

[0006] The ingot position includes:

[0007] The drafting system includes a rear drafting roller pair, a middle drafting roller pair, and a front drafting roller pair with identical structures. Each of the rear, middle, and front drafting roller pairs includes a lower drafting roller and an upper drafting roller. The lower drafting roller includes a roller shaft, with both ends connected to a roller seat. The roller seat includes an upper fixed seat and a lower drive seat, which are arranged opposite to each other along the direction of gravity. The upper fixed seat is a solid semi-cylindrical structure, with a left fixed end at the left end and a right fixed end at the right end. The left and right fixed ends have the same structure. Both the left and right fixed ends include connecting plates. The right end of the connecting plate at the left fixed end is connected to the upper fixed end. The bottom of the left semicircular surface of the upper fixed base is integrally fixedly connected to the bottom of the right semicircular surface of the upper fixed base. A connecting ring is provided on the connecting plate, comprising a left connecting ring and a right connecting ring with identical structures. Both the left and right connecting rings are semicircular in structure, vertically arranged, and rotatably connected to the connecting plate at their bottoms. A left magnet is provided at the upper end of the left connecting ring, and a right magnet is provided at the upper end of the right connecting ring. The left and right magnets have opposite magnetic properties. The magnets extend along the lower quarter circumference of the left connecting ring and the lower quarter circumference of the right connecting ring. The lower 1 / 4 circumference has equally spaced, equally radii-shaped insertion holes on its inner surface. The lower transmission seat is a solid semi-cylindrical structure, with a radius smaller than that of the upper fixed seat. The bottom surface of the lower transmission seat is fixedly connected to the bottom surface of the upper fixed seat. A transmission connection hole is formed along the length of the lower transmission seat. An intermediate transmission device is installed inside the lower transmission seat. The intermediate transmission device includes an intermediate transmission shaft that passes through the transmission connection hole and is slidably connected to it. The left and right ends of the intermediate transmission shaft extend out of the transmission connection hole, respectively. A left transmission connection gear is provided at the left end of the intermediate transmission shaft extending out of the transmission connection hole. A left drive connecting gear is fixedly sleeved on the intermediate drive shaft. A right drive connecting gear is provided at the right end of the intermediate drive shaft extending from the drive connecting hole. The right drive connecting gear is fixedly sleeved on the intermediate drive shaft. A roller sleeve, which is annular in structure, is sleeved on the roller shaft and integrally fixedly connected to the roller shaft. The drawing roller includes a roller shaft, on which a roller sleeve is provided. The roller sleeve and the roller shaft are connected by a bearing. A pressure assembly is provided at the upper part of the middle position of the roller shaft. The pressure assembly includes a pressure rod, the rear end of which is rotatably connected to the frame. A pressure element, which is either spring-loaded or leaf spring-loaded, is provided inside the pressure rod.Along the length of the pressure rod, a rear insert gripper, a middle insert gripper, and a front insert gripper are sequentially arranged. The middle portion of the roller shaft of the upper roller of the rear drafting roller pair is inserted into the rear insert gripper; the middle portion of the roller shaft of the upper roller of the middle drafting roller pair is inserted into the middle insert gripper; and the middle portion of the roller shaft of the upper roller of the front drafting roller pair is inserted into the front insert gripper.

[0008] A filament feeding system is located above the drawing system. The filament feeding system includes a first filament bob and a second filament bob, both suspended on a guide frame. The guide frame is located above the drawing system. A first tension point is provided below the guide frame. The first tension point includes a first passive tension point and a second passive tension point. The first tension point is either a freely rotating roller structure with double grooves at each spindle position, or a freely rotating tension roller that runs through each spindle position along the length of the front and rear carriage surfaces, with double grooves at each spindle position. A long... A filament active feeding device includes a filament active feeding roller. The filament active feeding roller is located above the frame between the rear drawing roller pair on the front carriage surface or the rear drawing roller pair on the rear carriage surface. The filament active feeding roller is arranged along the length direction of the front carriage surface or the rear carriage surface, and it passes through each spindle position on the front carriage surface or the rear carriage surface. A first feeding roller sleeve and a second feeding roller sleeve are provided on the filament active feeding roller located at each spindle position. The first feeding roller sleeve and the second feeding roller sleeve are annular structures with open ends, and they are fitted onto the filament active feeding roller and are integrally fixed together. A fixed connection is established, wherein the diameter of the first feed roller sleeve is larger than the diameter of the second feed roller sleeve. Filament feed pressing rollers are provided on the side of each spindle's active filament feed roller facing the front work platform or facing the rear work platform. Each filament feed pressing roller includes an intermediate pressing roller, on which a first pressing roller sleeve and a second pressing roller sleeve are provided. The first pressing roller sleeve and the second pressing roller sleeve are annular structures open at both ends. The first pressing roller sleeve and the second pressing roller sleeve are fitted onto the filament feed pressing roller and connected to it by a bearing. The diameter of the first pressing roller sleeve is smaller than the diameter of the second pressing roller sleeve, and the sum of the diameters of the first pressing roller sleeve and the first feed roller sleeve is smaller than the diameter of the second pressing roller sleeve. The second pressing roller sleeve has the same diameter as the second feeding roller sleeve. A pressing rod is provided on the filament feeding pressing roller between the first pressing roller sleeve and the second pressing roller sleeve. The pressing rod has an elastic pressing structure and an embedded gripper is provided on the pressing rod. The filament feeding pressing roller between the first pressing roller sleeve and the second pressing roller sleeve is embedded in the embedded gripper. A second tension roller is provided above the filament active feeding roller. The second tension roller is arranged along the length direction of the front or rear machine platform and passes through each of the spindle positions on the front and rear machine platforms. A first tension wheel and a second tension wheel with the same structure are provided on the second tension roller located at each of the spindle positions.The first tension wheel and the second tension wheel are fixedly sleeved on the second tension roller, maintaining a predetermined distance between them. The first tension wheel is located above the first pressing roller sleeve, and the second tension wheel is located above the second pressing roller sleeve. The filament active feed roller and the second tension roller are driven synchronously by the same transmission mechanism. A second tension guide groove is formed along the circumferential direction of the sides of the first tension wheel and the second tension wheel. The rear end of the pressing rod is rotatably connected to the second tension roller between the first tension wheel and the second tension wheel. A second filament third tension point is provided on the pressure rod located between the rubber roller sleeve of the drafting upper rubber roller of the front drafting roller pair and the rubber roller sleeve of the drafting upper rubber roller of the middle drafting roller pair. A first filament third tension point is provided on the pressure rod at the front of the rubber roller sleeve of the upper drawing roller of the drawing roller pair. The second filament third tension point is horizontal with the pressing point between the second pressing roller sleeve and the second feed roller sleeve. The first filament third tension point and the second filament third tension point are either freely rotatable guide wheels with guide grooves, or freely rotatable guide rods with guide grooves, or fixed guide hooks. A fourth tension point is provided at the front of the lower drawing roller of the front drawing roller pair. The fourth tension point is located below and in front of the first filament third tension point. The fourth tension point is either a fixed tension roller or a fixed guide wheel with guide grooves.

[0009] In the composite yarn production apparatus described above, preferably, the left end of the roller shaft on the left side of the front carriage platform is connected to the corresponding roller seat via a bearing and extends out of the roller seat; the left end of the roller shaft on the left side of the front carriage platform is connected to the corresponding drafting motor via a reduction gearbox; the right end of the roller shaft on the right side of the front carriage platform is connected to the corresponding roller seat via a bearing and extends out of the roller seat; a first connecting gear is provided on the right end of the roller shaft on the right side of the front carriage platform; the right end of the roller shaft on the right side of the rear carriage platform is connected to the corresponding roller seat via a bearing and extends out of the roller seat; a second connecting gear is provided on the right end of the roller shaft on the right side of the rear carriage platform; and the first connecting gear and the second connecting gear are connected for transmission at the same speed.

[0010] In the composite yarn production apparatus described above, preferably, a third connecting gear is provided at the right end of the left roller shaft on the front work platform and the right end of the right roller shaft on the rear work platform, as well as at both ends of the other roller shafts located in the middle. The third connecting gear is sleeved on the roller shaft and the two are fixedly connected.

[0011] In the composite yarn production apparatus described above, preferably, fixed connecting shafts are provided at the right end of the roller shaft on the left side of the front workbench, the left end of the roller shaft on the right side of the rear workbench, and both ends of the other intermediate roller shafts. The fixed connecting shafts are connected to the two ends of the roller shafts by bearings. Embedded teeth are provided on the side of the fixed connecting shafts, and the embedded teeth are arranged at equal arc intervals along half a circumference of the side of the fixed connecting shafts.

[0012] A method for producing composite yarn includes the following steps:

[0013] (1) Connect the lower drawing roller to the transmission, use external force to separate the left connecting ring and the right connecting ring, then place the fixed connecting shaft of the roller shaft between the left connecting ring and the right connecting ring, and then press the left connecting ring and the right connecting ring closed under the action of external force, so that the left magnet and the right magnet attract each other. After the left connecting ring and the right connecting ring are closed, the inserting teeth of the fixed connecting shaft are inserted into the inserting hole.

[0014] (2) The left ends of the roller shafts extending from the left side of the front carriage surface of the roller seat in the front drafting roller pair, the middle drafting roller pair, and the rear drafting roller pair are respectively driven by a reduction gearbox and a corresponding drafting motor, driving the roller shaft directly connected to it to rotate, which in turn drives the third connecting gear on it to rotate. The left connecting gear of the middle transmission shaft of the lower transmission seat rotates, driving the middle transmission shaft and the right connecting gear on it to rotate synchronously. The rotation of the right connecting gear drives the third connecting gear on the adjacent roller shaft to rotate, driving the adjacent roller shaft to rotate synchronously. The first connecting gear and the second connecting gear are connected at the same speed to drive the roller shaft to rotate. The roller shaft on the right side of the rear carriage table rotates, simultaneously pressing down each of the pressurizing components in sequence. The roller sleeves of the upper rollers of the front drawing roller pair, the middle drawing roller pair, and the rear drawing roller pair of each spindle are pressed tightly into contact with the roller sleeves of the lower drawing roller. A rear feed jaw is formed between the roller sleeves of the upper rollers of the rear drawing roller pair and the roller sleeves of the lower drawing roller. A middle transition jaw is formed between the roller sleeves of the upper rollers of the middle drawing roller pair and the roller sleeves of the lower drawing roller. A front output jaw is formed between the roller sleeves of the upper rollers of the front drawing roller pair and the roller sleeves of the lower drawing roller.

[0015] (3) The required short fiber roving is continuously fed into the drafting system through the back feed nip, and then held and output through the intermediate transition nip. During this process, it is subjected to the finishing drafting action of the back drafting zone between the back feed nip and the intermediate transition nip. Under the finishing drafting action, the fibers in the short fiber roving are stretched and in a taut state. The finished short fiber roving is held and output through the front output nip. During this process, it is subjected to the thinning drafting action of the front drafting zone between the intermediate transition nip and the front output nip. Under the thinning drafting action, some of the fibers in the short fiber roving are pulled out, thereby obtaining the short fiber sliver with the required linear density. At the same time, the first filament bobbin and the second filament bobbin are suspended on the corresponding guide frame. The second filament on the second filament bobbin passes through the passive tension point of the second filament, the second tension wheel, the pressing point between the second pressing roller sleeve and the second feed roller sleeve, and the third tension point of the second filament before entering the front output nip.

[0016] (4) The second filament fed in and the short fiber sliver obtained by drafting are combined at the front output nip and then output together to the drafting system. At the same time, the first filament on the first filament bobbin passes through the first tension point, the first tension wheel, the pressing point between the first pressing roller sleeve and the first feeding roller sleeve, and the third tension point of the first filament, and then enters the rear of the fourth tension point. Under the action of the twisting twist, the short fiber sliver and the second filament jointly output by the front output nip are twisted together. Under the action of twisting, the short fibers in the short fiber sliver are intertwined with each other, and the second filament in the middle is wrapped in the middle during the intertwining process, resulting in a composite yarn with short fiber on the outside and second filament in the middle. The second filament is in a taut and straight state in the composite yarn. The composite yarn is combined with the first filament fed in at the fourth tension point. The two are wrapped around the rear of the fourth tension point together. The first filament and the composite yarn output together form a composite yarn under the action of twisting twist.

[0017] Compared with existing technologies, this invention actively controls the feeding of the first and second filaments at different speeds using feed rollers of different diameters. This achieves coordinated and consistent tension control during the feeding of the first filament (which is in a straight state for core-sleeving) and the second filament (which is in a bent state for wrapping). Simultaneously, by setting a twist-blocking point at the front of the front roller, the upward transmission of twist is decomposed. This allows the first filament to be core-sleeved with the drafted short fiber sliver, and then wrapped with the second filament, thereby effectively improving the composite effect of the two filaments and the short fiber sliver, and improving the overall quality of the yarn. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the composite yarn production device of the present invention;

[0019] Figure 2 This is a schematic diagram of the roller seat structure of the present invention;

[0020] Figure 3 This is the structure of the upper fixing seat of the present invention.

[0021] Explanation of reference numerals in the attached diagram: 1-First filament, 2-Second filament, 3-Short fiber roving, 4-First filament bobbin, 5-Second filament bobbin, 6-Passive tension point of first filament, 7-Passive tension point of second filament, 8-Second tension roller, 9-First tension wheel, 10-Second tension wheel, 11-Filament active feed roller, 12-First feed roller sleeve, 13-Second feed roller sleeve, 14-Filament feed pressing roller, 15-Intermediate pressing roller, 16-First pressing roller sleeve, 17-Second pressing roller sleeve, 18-Rear drafting roller pair, 19-Intermediate drafting roller pair 20-Front drawing roller pair, 21-First filament third tension point, 22-Second filament third tension point, 23-Fourth tension point, 24-Roller seat, 25-Upper fixed seat, 26-Lower transmission seat, 27-Left connecting ring, 28-Right connecting ring, 29-Left magnet, 30-Right magnet, 31-Embedded hole, 32-Intermediate transmission shaft, 33-Left transmission connecting gear, 34-Right transmission connecting gear, 35-Roller shaft, 36-Third connecting gear, 37-Embedded tooth, 38-Fixed connecting shaft, 39-Left fixed end, 40-Right fixed end. Detailed Implementation

[0022] 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.

[0023] This application provides a composite yarn production apparatus, including a front worktable and a rear worktable. 300-1824 identical spindles are arranged at equal intervals along the length of the front and rear worktables. Each spindle has an identical structure and includes a drafting system. The drafting system includes a rear drafting roller pair 18, a middle drafting roller pair 19, and a front drafting roller pair 20. Each of the rear, middle, and front drafting roller pairs includes a lower drafting roller and an upper drafting roller. The lower drafting roller includes a roller shaft 35, which is a solid steel cylindrical structure. The roller shafts 35 of eight adjacent spindles are integrally connected. Both ends of the roller shaft 35 are connected to roller seats 24. The leftmost roller on the front worktable... The left end of shaft 35 is connected to the corresponding leftmost roller seat 24 via a bearing and extends out of roller seat 24. The left end of the leftmost roller shaft 35 on the front carriage platform extending out of roller seat 24 is connected to the corresponding traction motor via a reduction gearbox. The right end of the rightmost roller shaft 35 on the front carriage platform is connected to the corresponding rightmost roller seat 24 via a bearing and extends out of roller seat 24. A first connecting gear is provided on the right end of the rightmost roller shaft 35 on the front carriage platform extending out of roller seat 24. The right end of the rightmost roller shaft 35 on the rear carriage platform is connected to the corresponding rightmost roller seat 24 via a bearing and extends out of roller seat 24. A second connecting gear is provided on the right end of the rightmost roller shaft 35 on the rear carriage platform extending out of roller seat 24. The connecting gear and the second connecting gear are connected at the same speed to achieve the transmission connection between the traction systems of the front and rear carriage platforms. A third connecting gear 36 is provided at the right end of the leftmost roller shaft 35, the left end of the rightmost roller shaft 35, and the left and right ends of the other intermediate roller shafts 35 on both the front and rear carriage platforms. The third connecting gear 36 is fitted onto the roller shaft 35 and the two are fixedly connected. A fixed connecting shaft 38 is provided at the right end of the leftmost roller shaft 35, the left end of the rightmost roller shaft 35, and the left and right ends of the other intermediate roller shafts 35 on both the front and rear carriage platforms. The fixed connecting shaft 38 is connected to the left or right end of the roller shaft 35 via a bearing, thus ensuring a fixed connection after connection. The connecting shaft 38 is freely rotatable. Embedded teeth 37 are provided on the side of the fixed connecting shaft 38, spaced at equal arc intervals along half a circumference of the side of the fixed connecting shaft 38. The other intermediate roller seats 24 on the front and rear platforms include an upper fixed seat 25 and a lower transmission seat 26. The upper fixed seat 25 is a solid semi-cylindrical structure. A left fixed end 39 is provided at the left end of the upper fixed seat 25, and a right fixed end 40 is provided at the right end of the upper fixed seat 25. The left fixed end 39 and the right fixed end 40 have the same structure. The left fixed end 39 and the right fixed end 40 include connecting plates. The right end of the connecting plate of the left fixed end 39 is integrally fixedly connected to the bottom of the left semi-circular surface of the upper fixed seat 25.The left end of the connecting plate of the right fixed end 40 is integrally fixedly connected to the bottom of the right semi-circular surface of the upper fixed seat 25. The connecting plate of the left fixed end 39 and right fixed end 40 of the upper fixed seat 25 has a cuboid structure. A connecting ring is provided on the connecting plate of the left fixed end 39 and right fixed end 40. The connecting ring includes a left connecting ring 27 and a right connecting ring 28 with the same structure. The left connecting ring 27 has a semi-circular structure, is set vertically, and is rotatably connected to the connecting plate at its bottom. A left magnet 29 is provided at the upper end of the left connecting ring 27. The right connecting ring 28 has a semi-circular structure, is set vertically, and is rotatably connected to the connecting plate at its bottom. A left magnet 29 is provided at the upper end of the right connecting ring 27. A right magnet 30 is provided at the port of the part. The left magnet 29 and the right magnet 30 have opposite magnetic properties, which causes them to attract each other. Embedding holes 31 are provided at equal arc intervals along the inner surfaces of the lower quarter circumference of the left connecting ring 27 and the lower quarter circumference of the right connecting ring 28. The lower transmission seat 26 is a solid semi-cylindrical structure. The radius of the lower transmission seat 26 is smaller than the radius of the upper fixed seat 25. The bottom surface of the lower transmission seat 26 is fixedly connected to the bottom surface of the upper fixed seat 25. A transmission connection hole is provided along the length of the lower transmission seat 26. An intermediate transmission device is provided inside the lower transmission seat 26. The intermediate transmission device includes an intermediate transmission shaft 32, which passes through the transmission connection hole. 2. A sliding connection is established between the intermediate drive shaft 32 and the transmission connection hole, allowing the intermediate drive shaft 32 to rotate freely. The left and right ends of the intermediate drive shaft 32 extend out of the transmission connection hole, respectively. A left transmission connection gear 33 is provided at the left end of the intermediate drive shaft 32 extending out of the transmission connection hole, and the left transmission connection gear 33 is fixedly sleeved on the intermediate drive shaft 32. A right transmission connection gear 34 is provided at the right end of the intermediate drive shaft 32 extending out of the transmission connection hole, and the right transmission connection gear 34 is fixedly sleeved on the intermediate drive shaft 32. Roller sleeves are provided at the corresponding positions of the roller shafts 35 at each spindle position. The roller sleeves have an annular structure, and the material of the roller sleeves is consistent with that of the roller shafts 35. The roller sleeves are sleeved on the roller shafts 35, and the two are integrally fixedly connected. The rubber roller includes a rubber roller shaft, which is a solid steel cylindrical structure. Two adjacent rubber roller shafts are integrally and fixedly connected. A rubber roller sleeve is installed at a corresponding position on each spindle shaft, with a certain distance maintained between the sleeves. The rubber roller sleeve is a ring-shaped structure made of rubber and fits onto the rubber roller shaft, with the two connected by bearings, allowing the connected sleeve to rotate freely around the shaft. A pressure assembly is installed at the upper part of the middle position of each rubber roller shaft. The pressure assembly includes a pressure rod, the rear end of which is rotatably connected to the frame. A pressure element, either spring-loaded or leaf spring-loaded, is installed inside the pressure rod. Along the length of the pressure rod, a rear-embedded gripper, a middle-embedded gripper, and a front-embedded gripper are sequentially arranged.The middle portion of the roller shaft of the drafting roller of the rear drafting roller pair 18 is embedded in the rear embedding gripper; the middle portion of the roller shaft of the drafting roller of the middle drafting roller pair 19 is embedded in the middle embedding gripper; and the middle portion of the roller shaft of the drafting roller of the front drafting roller pair 20 is embedded in the front embedding gripper, thereby achieving the connection between each drafting roller and the pressure assembly. A filament feeding system is provided at the upper part of the drafting system. The filament feeding system includes a first filament bobbin 4 and a second filament bobbin 5. A first filament is wound on the first filament bobbin 4, and a second filament is wound on the second filament bobbin 5. The first filament and the second filament are identical. The first filament bobbin 4 and the second filament bobbin 5 are suspended on the guide frame, which is located above the drafting system. A first filament bobbin is provided directly below the guide frame. The first tension point is a passive structure, comprising a first filament passive tension point 6 and a second filament passive tension point 7. The first tension point is either a freely rotating roller structure with double grooves at each spindle position, or a freely rotating tension roller that runs through each spindle position along the length of the front and rear carriage surfaces, with double grooves at each spindle position. The first tension point regulates the tension and controls the direction of the passing first and second filaments. A filament active feeding device is located above the rear of the rear drafting roller pair 18 of the drafting system. This active feeding device includes a filament active feeding roller 11, which is located on the rear drafting roller pair 18 on the front carriage surface or the rear carriage surface. Above the frame between the rear drawing rollers 18, the filament active feed roller 11 is arranged along the length of the front or rear carriage surface, passing through each spindle position on the front or rear carriage surface. A first feed roller sleeve 12 and a second feed roller sleeve 13 are provided on the filament active feed roller 11 located at each spindle position. The first feed roller sleeve 12 and the second feed roller sleeve 13 are annular structures with open ends. The first feed roller sleeve 12 and the second feed roller sleeve 13 are fitted onto the filament active feed roller 11 and are integrally fixedly connected. The material of the first feed roller sleeve 12 and the second feed roller sleeve 13 is the same as that of the filament active feed roller 11. The diameter of the first feed roller sleeve 12 is larger than the diameter of the second feed roller sleeve 13. The filament feeding roller 11 is equipped with filament feeding pressing rollers 14 on either the side facing the front or rear of the worktable. Each filament feeding pressing roller 14 includes a middle pressing roller 15, on which a first pressing roller sleeve 16 and a second pressing roller sleeve 17 are mounted. Both the first and second pressing roller sleeves 16 and 17 are made of rubber and are annular structures open at both ends. The first and second pressing roller sleeves 16 and 17 are fitted onto the filament feeding pressing roller 14 and connected by bearings, allowing the connected first and second pressing roller sleeves 16 and 17 to rotate freely while maintaining a certain distance between them.The diameter of the first pressing roller sleeve 16 is smaller than the diameter of the second pressing roller sleeve 17, and the sum of the diameters of the first pressing roller sleeve 16 and the first feeding roller sleeve 12 is the same as the sum of the diameters of the second pressing roller sleeve 17 and the second feeding roller sleeve 13. A pressing rod is provided on the filament feeding pressing roller 14 between the first pressing roller sleeve 16 and the second pressing roller sleeve 17. The pressing rod is an elastic pressing structure, and an embedded gripper is provided on the pressing rod. The filament feeding pressing roller 14 between the first pressing roller sleeve 16 and the second pressing roller sleeve 17 is embedded in the embedded gripper, thereby realizing a detachable connection between the two. A second tension roller 8 is provided above the filament active feeding roller 11. The second tension roller 8 moves along the front The second tension roller 8 is positioned along the length of the front or rear worktable, passing through each spindle position on both the front and rear worktables. Identical first tension wheels 9 and 10 are mounted on the second tension roller 8 at each spindle position. The first tension wheels 9 and 10 are fixedly sleeved on the second tension roller 8, maintaining a certain distance between them. The first tension wheel 9 is located directly above the first pressing roller sleeve 16, and the second tension wheel 10 is located directly above the second pressing roller sleeve 17. The filament active feed roller 11 and the second tension roller 8 are driven synchronously by the same transmission mechanism, rotating along the first tension wheel 9 and the second tension roller 10. A second tension guide groove is formed on the circumferential direction of the side of the wheel 10. The rear end of the pressing rod is rotatably connected to the second tension roller 8 between the first tension wheel 9 and the second tension wheel 10. A second filament third tension point 22 is provided on the pressure rod located between the rubber roller sleeve of the drafting upper rubber roller of the front drafting roller pair 20 and the rubber roller sleeve of the drafting upper rubber roller of the middle drafting roller pair 19. A first filament third tension point 21 is provided on the pressure rod located at the front of the rubber roller sleeve of the drafting upper rubber roller of the front drafting roller pair 20. The second filament third tension point 22 and the pressing point between the second pressing roller sleeve 17 and the second feed roller sleeve 13 are kept horizontal. The first filament third tension point 21 and the pressing point between the second pressing roller sleeve 17 and the second feed roller sleeve 13 are kept horizontal. The pressing point between the first pressing roller sleeve 16 and the first feeding roller sleeve 12 remains horizontal. The third tension point 21 of the first filament and the third tension point 22 of the second filament are either freely rotatable guide wheels with guide grooves, or freely rotatable guide rods with guide grooves, or fixed guide hooks. A fourth tension point 23 is provided at the front of the lower roller of the front drafting roller pair 20. The fourth tension point 23 is located below and in front of the third tension point 21 of the first filament. The fourth tension point 23 is either a fixed tension roller or a fixed guide wheel with guide grooves. The fourth tension point 23 provides a certain degree of resistance to the upward transmission of twist.

[0024] This application provides a method for producing composite yarn, including the following steps:

[0025] (1) First, the lower roller is connected to the transmission. At this time, external force is used to separate the left connecting ring 27 and the right connecting ring 28. Then, the fixed connecting shaft 38 of the roller shaft 35 is placed between the separated left connecting ring 27 and the right connecting ring 28. Then, the left connecting ring 27 and the right connecting ring 28 are pressed and closed under the action of external force. Then, the left magnet 29 and the right magnet 30 are attracted to each other and tightly pressed and closed. After the left connecting ring 27 and the right connecting ring 28 are closed, the inserting tooth 37 of the fixed connecting shaft 38 is inserted into the inserting hole 31, thereby realizing the fixed connection between the fixed connecting shaft 38 and the upper fixed seat 25 of the roller seat 24. At this time, the third connecting gear 36 of the roller shaft 35 and the left transmission connecting gear 33 or the right transmission connecting gear 34 of the middle transmission shaft 32 of the lower transmission seat 26 are engaged with each other, thereby realizing the transmission connection between the two.

[0026] (2) The left ends of the leftmost roller shafts 35 on the front platform of the front drafting roller pair 20, the middle drafting roller pair 19, and the rear drafting roller pair 18 are respectively driven by a reduction gearbox to the corresponding drafting motor, thereby driving the roller shafts 35 directly connected to them to rotate. The rotation of the roller shafts 35 then drives the third connecting gear 36 on it to rotate, which in turn drives the left connecting gear 33 of the middle drive shaft 32 of the lower drive seat 26, which is closely matched with it, to rotate. This then drives the middle drive shaft 32 and the right connecting gear 34 on it to rotate synchronously. The rotation of the right connecting gear 34 then drives the third connecting gear 36 on the adjacent roller shaft 35 to rotate, which in turn drives the adjacent roller shafts 35 to rotate synchronously. Thus, the transmission connection between the roller shafts 35 on the front platform is realized through the roller seat 24, and then the first connecting gear and the roller shaft 35 are connected by the same speed transmission. The second connecting gear drives the rightmost roller shaft 35 of the rear carriage to rotate. Each roller shaft 35 on the rear carriage is interconnected via a corresponding roller seat 24, thus achieving a transmission connection between the roller shafts 35 on the front and rear carriages. Simultaneously, each pressure assembly is pressed down sequentially, causing the roller sleeves of the upper drafting rollers of the front drafting roller pair 20, the middle drafting roller pair 19, and the rear drafting roller pair 18 of each spindle to engage with the lower drafting rollers. The roller sleeves are pressed tightly together, thereby realizing the frictional transmission of the rotating roller sleeves on the rubber roller sleeves. This forms a rear feed jaw between the rubber roller sleeve of the upper drafting roller of the rear drafting roller pair 18 and the roller sleeve of the lower drafting roller, a middle transition jaw between the rubber roller sleeve of the upper drafting roller of the middle drafting roller pair 19 and the roller sleeve of the lower drafting roller, and a front output jaw between the rubber roller sleeve of the upper drafting roller of the front drafting roller pair 20 and the roller sleeve of the lower drafting roller.

[0027] (3) The required short fiber roving 3 is continuously fed into the drafting system through the back feed nip, and then held and output through the intermediate transition nip. During this process, it is subjected to the finishing drafting action of the back drafting zone between the back feed nip and the intermediate transition nip. Under the finishing drafting action, the fibers in the short fiber roving 3 are stretched and in a taut state. The finished short fiber roving 3 is held and output through the front output nip. During this process, it is subjected to the thinning drafting action of the front drafting zone between the intermediate transition nip and the front output nip. Under the thinning drafting action, some of the fibers in the short fiber roving 3 are pulled out, thereby obtaining the short fiber sliver with the required linear density. At the same time, the first filament bobbin 4 and the second filament bobbin 5 are suspended on the corresponding guide frames. The second filament 2 on the second filament bobbin 5 is passed sequentially through the second filament passive tension point 7, the second tension wheel 10, the pressing point between the second pressing roller sleeve 17 and the second feed roller sleeve 13, and the second filament third tension point 22. Then it enters the front output jaw. During this process, the second filament 2 passes under the passive tension point 7 of the second filament, thereby achieving the turning action of the second filament 2. Then it passes under the active tension wheel 10, thereby achieving the turning action of the second filament 2 again. At the same time, the tension control and conditioning action of the second filament 2 before active feeding between the first tension point and the second tension point is achieved. Then it is pressed and fed by the second pressing roller sleeve 17 and the second feeding roller sleeve 13, thereby achieving the active feeding action of the second filament 2. At the same time, the second filament 2 is turned again during the feeding process, and the tension conditioning action of the second filament is achieved between the second tension point and the pressing point. Finally, it passes under the upper part of the third tension point 22 of the second filament, thereby achieving the tension control action before feeding between the horizontal pressing point and the third tension point 22 of the second filament.

[0028] (4) The second filament 2 fed in and the short fiber sliver obtained by drawing meet at the front output nip and are output together from the drawing system. At the same time, the first filament 1 on the first filament bobbin 4 passes sequentially through the first tension point, the first tension wheel 9, the pressing point between the first pressing roller sleeve 16 and the first feeding roller sleeve 12, the third tension point 21 of the first filament, and then enters the rear of the fourth tension point 23. During this process, the first filament 1 passes through the lower part of the passive first filament passive tension point 6, thereby achieving the turning action of the first filament 1. Then it passes through the upper part of the active first tension wheel 9, thereby achieving the turning action of the first filament 1 again. At the same time, the tension control of the first filament 1 before active feeding between the first tension point and the second tension point is adjusted. The first filament 1 is fed into the ground through the first pressing roller sleeve 16 and the first feeding roller sleeve 12, thereby achieving active feeding of the first filament 1. Simultaneously, the feeding process re-directs the first filament 1 and simultaneously adjusts its tension between the second tension point and the pressing point. Finally, it passes over the upper part of the third tension point 21 of the first filament, thus achieving tension control before feeding between the horizontal pressing point and the third tension point 21. Due to the friction generated by the fixed fourth tension point 23, the twist transmitted from bottom to top is resisted, causing some of the twist to be transmitted upwards along the fourth tension point 23. Under the action of the twisting mechanism, the short fiber sliver and the second filament 2, jointly output by the front output nip, are twisted together. The twisting causes the short fibers within the short fiber sliver to intertwine, and during this intertwining process, the second filament 2 in the middle is wrapped around the inside, resulting in a composite yarn with short fibers on the outer layer and the second filament 2 in the middle. The second filament 2 is in a taut and straightened state within the composite yarn. The composite yarn merges with the fed first filament 1 at the fourth tension point 23, and both pass around the rear of the fourth tension point 23. The first filament 1 and the composite yarn, under the action of twisting, are combined into yarn. During the compounding process, the first filament 1 intertwines with the already twisted and finished composite yarn to obtain the final composite yarn. During the winding process, either the composite yarn is in a straight state and the first filament 1 is wound around the composite yarn, thus causing the first filament 1 to be in a bent state, or the composite yarn and the first filament 1 are intertwined, thus causing both the first filament 1 and the composite yarn to be in a bent state. As a result, in the final composite yarn, the first filament 1 is in a bent state and the second filament 2 is in a straight state. Consequently, the length of the first filament 1 in the composite yarn is greater than the length of the second filament 2 in the composite yarn, and the ratio of the length of the first filament 1 in the composite yarn to the length of the second filament 2 in the composite yarn is equal to the ratio of the diameters of the first feed roller sleeve 12 and the second feed roller sleeve 13. This achieves the control of the tension consistency of the first filament 1 and the second filament 2 before they are fed into the composite yarn.

[0029] 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 composite yarn production apparatus, characterized in that, It includes a front platform and a rear platform, and a number of spindle positions are provided at equal intervals along the front platform and the rear platform; Wherein, the ingot position includes: The drafting system includes a rear drafting roller pair, a middle drafting roller pair, and a front drafting roller pair with identical structures. Each of the rear, middle, and front drafting roller pairs includes a lower drafting roller and an upper drafting roller. The lower drafting roller includes a roller shaft, with both ends connected to a roller seat. The roller seat includes an upper fixed seat and a lower drive seat, which are arranged opposite to each other along the direction of gravity. The upper fixed seat is a solid semi-cylindrical structure with a left fixed end at its left end and a right fixed end at its right end. The left and right fixed ends have the same structure. Both the left and right fixed ends include connecting plates, with the right end of the connecting plate at the left fixed end connected to the upper fixed seat. The bottom of the left semicircular surface of the upper fixed seat is integrally fixedly connected to the bottom of the right semicircular surface of the upper fixed seat. A connecting ring is provided on the connecting plate, comprising a left connecting ring and a right connecting ring with identical structures. Both the left and right connecting rings are semicircular in structure, vertically arranged, and rotatably connected to the connecting plate at their bottoms. A left magnet is provided at the upper port of the left connecting ring, and a right magnet is provided at the upper port of the right connecting ring. The left and right magnets have opposite magnetic properties, extending along the lower quarter circumference of both the left and right connecting rings. The inner surface of the lower transmission seat has equally spaced, arc-shaped insertion holes. The lower transmission seat is a solid semi-cylindrical structure, with a radius smaller than that of the upper fixed seat. The bottom surface of the lower transmission seat is fixedly connected to the bottom surface of the upper fixed seat. A transmission connection hole is formed along the length of the lower transmission seat. An intermediate transmission device is installed inside the lower transmission seat, including an intermediate transmission shaft that passes through the transmission connection hole and is slidably connected to it. The left and right ends of the intermediate transmission shaft extend out of the transmission connection hole, respectively. A left transmission connection gear is provided at the left end of the intermediate transmission shaft extending out of the transmission connection hole, and the left transmission connection gear is fixed in a sleeve. A right transmission connecting gear is provided on the right end of the intermediate transmission shaft, extending from the transmission connecting hole. The right transmission connecting gear is fixedly sleeved on the intermediate transmission shaft. Rotation of the right transmission connecting gear drives the third connecting gear on the adjacent roller shaft to rotate, causing the adjacent roller shaft to rotate synchronously. A roller sleeve, which is annular in structure, is sleeved on the roller shaft and integrally fixedly connected to the roller shaft. The drafting upper rubber roller includes a roller shaft, on which a roller sleeve is provided. The roller sleeve and roller shaft are connected by bearings. A pressure assembly is provided at the upper part of the middle position of the roller shaft. The pressure assembly includes a pressure rod, the rear end of which is rotatably connected to the frame.A pressure-applying component, either spring-loaded or leaf spring-loaded, is provided within the pressure rod. Along the length of the pressure rod, a rear insert gripper, a middle insert gripper, and a front insert gripper are sequentially arranged. The middle portion of the roller shaft of the upper roller of the rear drafting roller pair is inserted into the rear insert gripper; the middle portion of the roller shaft of the upper roller of the middle drafting roller pair is inserted into the middle insert gripper; and the middle portion of the roller shaft of the upper roller of the front drafting roller pair is inserted into the front insert gripper. A filament feeding system is located above the drawing system. The filament feeding system includes a first filament bob and a second filament bob, both suspended on a guide frame. The guide frame is located above the drawing system. A first tension point is provided below the guide frame. The first tension point includes a first passive tension point and a second passive tension point for the filament. The first tension point is either a freely rotating roller structure with double grooves at each spindle position, or a freely rotating tension roller that runs through each spindle position along the length of the front and rear carriage surfaces, with double grooves at each spindle position. A filament is positioned above the rear of the rear drawing roller pair. An active feeding device, comprising an active filament feeding roller, is located above the frame between the rear drawing roller pair on the front or rear carriage surface. The active filament feeding roller is arranged along the length of the front or rear carriage surface and passes through each spindle position on the front or rear carriage surface. A first feeding roller sleeve and a second feeding roller sleeve are provided on the active filament feeding roller located at each spindle position. The first and second feeding roller sleeves are annular structures open at both ends, and are integrally fixed onto the active filament feeding roller. The connection is made such that the diameter of the first feed roller sleeve is larger than the diameter of the second feed roller sleeve. Filament feed pressing rollers are provided on either the side of the active filament feed roller facing the front platform or the side facing the rear platform at each of the spindle positions. Each filament feed pressing roller includes an intermediate pressing roller, on which a first pressing roller sleeve and a second pressing roller sleeve are provided. The first pressing roller sleeve and the second pressing roller sleeve are annular structures open at both ends. The first pressing roller sleeve and the second pressing roller sleeve are fitted onto the filament feed pressing roller and connected by a bearing. The diameter of the first pressing roller sleeve is smaller than the diameter of the second pressing roller sleeve, and the sum of the diameters of the first pressing roller sleeve and the first feed roller sleeve is smaller than the diameter of the second pressing roller sleeve. The second pressing roller sleeve and the second feeding roller sleeve have the same diameter. A pressing rod is provided on the filament feeding pressing roller between the first pressing roller sleeve and the second pressing roller sleeve. The pressing rod has an elastic pressing structure and an embedded gripper is provided on the pressing rod. The filament feeding pressing roller between the first pressing roller sleeve and the second pressing roller sleeve is embedded in the embedded gripper. A second tension roller is provided above the filament active feeding roller. The second tension roller is arranged along the length direction of the front machine platform or the rear machine platform. The second tension roller passes through each of the spindle positions on the front machine platform and the rear machine platform. A first tension wheel and a second tension wheel with the same structure are provided on the second tension roller located at each of the spindle positions.The first tension wheel and the second tension wheel are fixedly sleeved on the second tension roller, maintaining a predetermined distance between them. The first tension wheel is located above the first pressing roller sleeve, and the second tension wheel is located above the second pressing roller sleeve. The filament active feed roller and the second tension roller are driven synchronously by the same transmission mechanism. A second tension guide groove is formed along the circumferential direction of the sides of the first tension wheel and the second tension wheel. The rear end of the pressing rod is rotatably connected to the second tension roller between the first tension wheel and the second tension wheel. A second filament third tension point is provided on the pressure rod located between the rubber roller sleeve of the drafting upper rubber roller of the front drafting roller pair and the rubber roller sleeve of the drafting upper rubber roller of the middle drafting roller pair. A first filament third tension point is provided on the pressure rod at the front of the rubber roller sleeve of the upper drawing roller of the drawing roller pair. The second filament third tension point is horizontal with the pressing point between the second pressing roller sleeve and the second feed roller sleeve. The first filament third tension point and the second filament third tension point are either freely rotatable guide wheels with guide grooves, or freely rotatable guide rods with guide grooves, or fixed guide hooks. A fourth tension point is provided at the front of the lower drawing roller of the front drawing roller pair. The fourth tension point is located below and in front of the first filament third tension point. The fourth tension point is either a fixed tension roller or a fixed guide wheel with guide grooves.

2. The composite yarn production apparatus according to claim 1, characterized in that, The left end of the roller shaft on the left side of the front platform is connected to the corresponding roller seat via a bearing and extends out of the roller seat. The left end of the roller shaft on the left side of the front platform is connected to the corresponding traction motor via a reduction gearbox. The right end of the roller shaft on the right side of the front platform is connected to the corresponding roller seat via a bearing and extends out of the roller seat. A first connecting gear is provided on the right end of the roller shaft on the right side of the front platform. The right end of the roller shaft on the right side of the rear platform is connected to the corresponding roller seat via a bearing and extends out of the roller seat. A second connecting gear is provided on the right end of the roller shaft on the right side of the rear platform. The first connecting gear and the second connecting gear are connected for transmission at the same speed.

3. The composite yarn production apparatus according to claim 2, characterized in that, A third connecting gear is provided at the right end of the left roller shaft on the front platform and the right roller shaft on the rear platform, as well as at both ends of the other roller shafts in the middle. The third connecting gear is sleeved on the roller shaft and the two are fixedly connected.

4. The composite yarn production apparatus according to claim 3, characterized in that, Fixed connecting shafts are provided at the right end of the roller shaft on the left side of the front platform, the left end of the roller shaft on the right side of the rear platform, and both ends of the other intermediate roller shafts. The fixed connecting shafts are connected to the two ends of the roller shafts by bearings. Embedded teeth are provided on the side of the fixed connecting shafts, and the embedded teeth are arranged at equal arc intervals along half a circumference of the side of the fixed connecting shafts.

5. A method for producing composite yarn, using the production apparatus according to any one of claims 1 to 4, characterized in that, Includes the following steps: (1) Connect the lower drawing roller to the transmission, use external force to separate the left connecting ring and the right connecting ring, then place the fixed connecting shaft of the roller shaft between the left connecting ring and the right connecting ring, and then press the left connecting ring and the right connecting ring closed under the action of external force, so that the left magnet and the right magnet attract each other. After the left connecting ring and the right connecting ring are closed, the inserting teeth of the fixed connecting shaft are inserted into the inserting hole. (2) The left ends of the roller shafts extending from the left side of the front carriage surface of the roller seat of the front drafting roller pair, the middle drafting roller pair, and the rear drafting roller pair are respectively driven by a reduction gearbox and the corresponding drafting motor, driving the roller shaft directly connected to it to rotate, and then driving the third connecting gear on it to rotate. The left connecting gear of the middle transmission shaft of the lower transmission seat rotates, driving the middle transmission shaft and the right connecting gear on it to rotate synchronously. The rotation of the right connecting gear drives the third connecting gear on the adjacent roller shaft to rotate, driving the adjacent roller shaft to rotate synchronously. The first connecting gear and the second connecting gear are connected by the same speed transmission to drive the roller shaft to rotate. The roller shaft on the right side of the rear carriage table rotates, simultaneously pressing down each of the pressurizing components in sequence. The roller sleeves of the upper rollers of the front drawing roller pair, the middle drawing roller pair, and the rear drawing roller pair of each spindle are pressed tightly into contact with the roller sleeves of the lower drawing roller. A rear feed jaw is formed between the roller sleeves of the upper rollers of the rear drawing roller pair and the roller sleeves of the lower drawing roller. A middle transition jaw is formed between the roller sleeves of the upper rollers of the middle drawing roller pair and the roller sleeves of the lower drawing roller. A front output jaw is formed between the roller sleeves of the upper rollers of the front drawing roller pair and the roller sleeves of the lower drawing roller. (3) The required short fiber roving is continuously fed into the drafting system through the back feed nip, and then held and output through the intermediate transition nip. During this period, it is subjected to the sorting and stretching action of the back drafting zone between the back feed nip and the intermediate transition nip. Under the sorting and stretching action, the fibers in the short fiber roving are stretched and in a tensile state. The sorted short fiber roving is held and output through the front output nip. During this period, it is subjected to the thinning and stretching action of the front drafting zone between the intermediate transition nip and the front output nip. Under the thinning and stretching action, some of the fibers in the short fiber roving are pulled out, and then the short fiber sliver with the required linear density is obtained. At the same time, the first filament bobbin and the second filament bobbin are suspended on the corresponding guide frame. The second filament on the second filament bobbin passes through the passive tension point of the second filament, the second tension wheel, the pressing point between the second pressing roller sleeve and the second feed roller sleeve, and the third tension point of the second filament in sequence before entering the front output nip. (4) The second filament fed in and the short fiber sliver obtained by drafting are combined at the front output nip and then output together to the drafting system. At the same time, the first filament on the first filament bobbin passes through the first tension point, the first tension wheel, the pressing point between the first pressing roller sleeve and the first feeding roller sleeve, and the third tension point of the first filament and then enters the rear of the fourth tension point. Under the action of the twisting twister, the short fiber sliver and the second filament jointly output by the front output nip are twisted together. Under the action of twisting, the short fibers in the short fiber sliver are intertwined with each other, and the second filament in the middle is wrapped in the middle during the intertwining process, resulting in a composite yarn with short fiber on the outer layer and second filament in the middle. The second filament is in a taut and straight state in the composite yarn. The composite yarn is combined with the first filament fed in at the fourth tension point. The two are wrapped around the rear of the fourth tension point together. The first filament and the composite yarn output together form a composite yarn under the action of twisting twist.

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