PLA blended yarn, processing device and production process thereof

Abstract

The invention provides a PLA blended yarn, a processing device and a production process thereof, and relates to the technical field of spinning. According to the PLA blended yarn, the processing device and the production technology of the PLA blended yarn, the processing device comprises an opener, a carding machine, a drawing frame, a spinning machine and a winding device, and the winding device comprises a machine table, a driving box, a winding cylinder, a negative pressure pump, a filtering box, an air compressor and an air storage tank. According to the invention, multiple groups of blowing holes are added in the yarn guide hole, so that feather on the surface of the yarn is blown away while the yarn is guided, compressed air enables the yarn not to be in direct contact with the inner side wall of the yarn guide hole, meanwhile, the yarn can be cooled, PLA fibers in the yarn are prevented from being melted, the production speed can be effectively improved, and the production quality of the PLA blended yarn is ensured; the torque condition of the winding drum during winding is detected through the torque sensor, and the rotating speed of the driving motor is controlled according to the detection result, so that reasonable winding speed and tension are obtained, and the production quality of the PLA blended yarn is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spinning, and in particular to a PLA blended yarn, a processing device and a production process thereof. Background Art

[0002] In today's society, environmental pollution has become a major global concern, and green, eco-friendly textiles are increasingly popular. PLA fiber is a new type of green, eco-friendly fiber. It is fully biodegradable and has excellent biocompatibility. It can be obtained from raw materials such as grains, corn, and sugar beets. Microbial activity in soil or seawater decomposes the waste into carbon dioxide and water. The fiber is also stain-resistant, UV-resistant, and chlorine-resistant, making it a sustainable, eco-friendly fiber. It can be spun pure or blended with various fibers. Fabrics made from PLA fiber offer comfortable stretch and wrinkle recovery, are easy to care for, and are suitable for low-temperature dyeing. Nylon is a common textile fiber, which is characterized by high strength, good wear resistance, light weight, good dyeability, low temperature resistance, good elasticity, good wrinkle resistance, and strong elastic recovery ability. In addition, cotton fiber has good hygroscopicity and can absorb moisture from the surrounding atmosphere. The moisture content is about 8-10%, which makes cotton fiber fabrics feel soft and not stiff when in contact with the skin; when the humidity increases or the temperature is high, the moisture in the cotton fiber will evaporate and dissipate, maintaining the water balance of the fabric and making people feel comfortable; cotton fiber also has excellent air permeability and warmth retention. In order to make full use of the characteristics of these three fibers to complement each other's advantages, it is necessary to develop a blended yarn of PLA fiber, cotton fiber and nylon fiber.

[0003] PLA fiber and nylon fiber have great resilience, which can easily cause poor forming or even tube squeezing when winding after spinning is completed; special attention should be paid to the winding tension setting during automatic winding, and because PLA fiber has a low melting point, the friction between the yarn and the yarn guide wheel during winding will generate heat, causing part of the fiber to melt, affecting normal production and product quality. To solve the above problems, the existing technology usually adopts the method of reducing the winding tension and reducing the production speed. Obviously, this solution is not conducive to improving production efficiency. Therefore, when developing a blended yarn of PLA fiber, cotton fiber and nylon fiber, it is necessary to simultaneously optimize and update the PLA blended yarn processing device and its production process. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a PLA blended yarn, a processing device and a production process thereof, which solves the problems of the PLA blended yarn, the processing device and the production process thereof in the existing technology, such as the need to reduce the winding tension and the production speed to solve the problems of poor winding forming and low production efficiency caused by partial fiber melting due to high temperature.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a PLA blended yarn processing device, including a cotton opener, a cotton carding machine, a drawing machine, a spinning machine and a winding device, the winding device including a machine platform, a drive box, a winding drum, a negative pressure pump, a filter box, an air compressor and an air storage tank, the drive box is slidably connected to the upper wall of the machine platform through two sets of guide rails, the inner side wall of the drive box is fixedly connected with a partition, the lower wall of the partition and the upper wall of the inner side of the drive box are respectively provided with a second rotating seat and a first rotating seat which are opposite to each other in the upper and lower directions, and the second rotating seat and the inner wall of the first rotating seat are connected to rotate together A rotating shaft is connected, and a rotating drive structure for driving the rotating shaft to rotate is provided between the partition and the rotating shaft, and a torque detection structure for detecting the rotating torque of the rotating shaft is provided between the rotating shaft and the inner lower wall of the driving box, the upper end of the rotating shaft passes through the upper wall of the driving box and is fixedly connected to a tray, and the upper wall of the tray is fixedly connected to a clamping tube, and the winding drum is sleeved on the outer wall of the clamping tube, and a positioning structure for fixing the axial position of the winding drum is provided between the clamping tube and the winding drum, and the rear wall of the driving box is provided with a first support rod through a lifting structure, and a yarn guiding structure for guiding yarn is provided at the upper end of the first support rod.

[0006] Preferably, the rotary drive structure includes a drive motor and two sets of gears. The drive motor is fixedly connected to the lower wall of the partition and is located on the rear side of the rotating shaft. The drive motor extension shaft passes through the inner wall of the partition and extends above the partition. The two sets of gears are respectively fixedly connected to the outer wall of the drive motor extension shaft and the outer wall of the rotating shaft, and the circumferential outer walls of the two sets of gears are engaged with each other.

[0007] Preferably, the torque detection structure is a torque sensor, which is fixedly connected to the inner lower wall of the drive box. The torque sensor input shaft is opposite to the axis of the lower end of the rotating shaft and is fixedly connected to the lower end of the rotating shaft through a coupling.

[0008] Preferably, the positioning structure includes a plunger plate, two groups of positioning pins and two groups of positioning holes, the two groups of positioning holes are arranged on the inner wall of the winding drum and are arranged radially opposite to each other, the plunger plate is slidably connected to the inner wall of the clamping tube, the outer wall of the plunger plate is sleeved with a rubber ring, the outer wall of the rubber ring is tightly pressed against the inner wall of the clamping tube, the upper wall of the plunger plate is provided with a handle for convenient lifting and pressing, the lower wall of the plunger plate is fixedly connected to two groups of driving plates distributed front and back, and the inner walls of the two groups of driving plates are provided with sliding plates that pass through front and back. The groove is V-shaped, and the two groups of positioning pins are slidably connected between the opposite sides of the two groups of driving plates. The outer wall of the positioning pin at one end facing the axis of the clamping tube is fixedly connected with a sliding rod, the axis of the sliding rod is perpendicular to the axis of the positioning pin, and the axial ends of the sliding rod extend toward the front and rear sides of the positioning pin respectively. The sliding rod extends to the outer walls on the front and rear sides of the positioning pin and is slidably connected to the inner side walls of a group of slides respectively. The end of the positioning pin away from the sliding rod passes through the outer wall of the clamping tube, and the diameter of the positioning pin matches the inner diameter of the positioning hole.

[0009] Preferably, the lifting structure includes two groups of connecting seats and a group of electric telescopic rods. The two groups of connecting seats are distributed up and down and are fixedly connected to the rear wall of the drive box in sequence. The electric telescopic rod is fixedly connected between the two groups of connecting seats, and the first support rod is fixedly connected to the end of the extended shaft of the electric telescopic rod.

[0010] Preferably, the yarn guiding structure includes a first ring sleeve and a second ring sleeve, the first ring sleeve is fixedly connected to the upper end of the first support rod, the extension line of the axis of the first ring sleeve intersects with the axis of the winding drum, the inner cavity of the first ring sleeve is provided with an air storage cavity, the inner side wall of the first ring sleeve is fixedly connected to a yarn guide nozzle, the inner side wall of the yarn guide nozzle is provided with a yarn guide hole that passes through from front to back, the side cross-section of the yarn guide hole is conical with a small front and a large back, the inner wall of the yarn guide nozzle is provided with multiple groups of blowing holes, the yarn guide hole and the air storage cavity are connected through multiple groups of blowing holes, the outer wall of the first ring sleeve is connected to the air tank through an air pipe joint and a hose, and the air tank is connected to the air compressor through a hose.

[0011] Preferably, the outer wall of the first support rod is fixedly connected to a fixing sleeve, the rear wall of the fixing sleeve is fixedly connected to a fixing plate, the upper wall of the fixing plate at one end away from the fixing sleeve is fixedly connected to the second support rod, the second ring sleeve is fixedly connected to the upper end of the second support rod, the inner wall of the second ring sleeve is provided with a yarn hole that passes through from front to back, the yarn hole and the axis of the yarn guide hole are colinear, an air suction cavity is provided between the circumferential outer wall of the second ring sleeve and the inner wall of the yarn hole, the front wall of the second ring sleeve is provided with multiple groups of adsorption holes that pass through the inside of the suction cavity, the outer wall of the second ring sleeve is connected to the filter box through an trachea joint and a hose, and the filter box is connected to the negative pressure pump through a hose.

[0012] Preferably, four groups of feet are fixedly connected to the lower wall of the machine, and the four groups of feet are provided with anti-slip pads at the ends away from the machine. A front plate is fixedly connected to the upper wall of the machine near the front wall, and the inner wall of the front plate is provided with a through groove running through from front to back, and the length direction of the through groove is parallel to the left and right direction of the machine. Quick-lock screws are provided on the inner side walls of the through groove, and the drive box and the front plate are locked by quick-lock screws.

[0013] A PLA blended yarn is processed using the above-mentioned PLA blended yarn processing device. The PLA blended yarn is blended with PLA fiber, cotton fiber and nylon fiber. The PLA fiber, cotton fiber and nylon fiber are all selected in specifications of 1.5D×38mm.

[0014] According to the above-mentioned production process of a PLA blended yarn processing device, the production process includes the following steps: S1. Raw material pretreatment: PLA fiber raw material packages, cotton fiber raw material packages, and nylon fiber raw material packages are opened and loosened and placed for 12 hours; S2, cotton opening and combing, using cotton openers and carding machines to open and comb PLA fibers, cotton fibers, and nylon fibers; S3, drawing and spinning the PLA fiber, cotton fiber and nylon fiber through a drawing frame and a spinning machine to form a PLA blended yarn; S4, winding, the PLA blended yarn is passed through the yarn hole and the yarn guide hole and then wound on the outer wall of the winding drum. After the drive motor is started, the winding drum is driven by two sets of gears to rotate and retract the yarn. The electric telescopic rod extends and retracts the shaft, driving the yarn to move back and forth around the winding drum axis to achieve uniform winding; During the yarn guiding process, the air compressor pressurizes the air tank, and the compressed air in the air tank is sent into the air storage cavity through the hose and hose connector, and then blown into the yarn guide hole through multiple sets of blowing holes. The compressed air blown out through the multiple sets of blowing holes forms an air film inside the blowing hole, keeping the yarn from contacting the inner wall of the yarn guide hole. At the same time, the compressed air cools the yarn and can blow away the feathers on the yarn surface. During the blowing process, the negative pressure pump draws air into the suction chamber through the filter box and the hose. The suction chamber absorbs the air blown backward from the blowing hole through multiple groups of adsorption holes, and absorbs the feathers blown off the yarn surface. During the winding process, the torque sensor is used to detect the rotating torque of the winding drum, and then the speed of the drive motor is controlled to ensure that the winding speed and tension are within the set range.

[0015] The present invention provides a PLA blended yarn, a processing device, and a production process thereof. It has the following beneficial effects: 1. Compared with the existing technology, the PLA blended yarn, processing device and production process thereof, by adding multiple groups of blowing holes in the yarn guide hole, blow compressed air toward the yarn surface through the blowing holes while guiding the yarn, blow away the feathers on the yarn surface, and absorb them through the adsorption holes in the second ring sleeve. When the compressed air is blown toward the yarn surface, it plays a role in isolating the outer wall of the yarn from the inner wall of the yarn guide hole, so that the yarn and the inner wall of the yarn guide hole are not in direct contact. At the same time, it can also cool the yarn to prevent the PLA fiber in the yarn from melting, which can effectively improve the production speed and ensure the production quality of PLA blended yarn.

[0016] 2. Compared with the existing technology, the PLA blended yarn, processing device and production process thereof use a torque sensor to detect the torque of the winding drum during winding, and control the speed of the drive motor according to the detection result, thereby obtaining a reasonable winding speed and tension, which is conducive to improving the production quality of PLA blended yarn; 3. Compared with the existing technology, the PLA blended yarn, processing device and production process thereof, and the PLA blended yarn produced by this invention fully combine the advantages of PLA fiber, cotton fiber and nylon fiber, have the characteristics of anti-fouling and UV protection, and have good resilience and wrinkle recovery, high strength and good wear resistance. The subsequent finished fabric makes people feel comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of point A in the middle; Figure 3 For the present invention Figure 1 A partial enlarged view of point B in the middle; Figure 4 A partial side cross-sectional view of the internal structure of the drive box of the present invention; Figure 5 A partial cross-sectional view of the connection structure of the clamping tube, winding drum and plunger plate of the present invention; Figure 6 It is a schematic diagram of the plunger plate, drive plate and positioning pin connection structure of the present invention from above; Figure 7 It is a partial sectional side view of the internal structure of the first ring sleeve of the present invention; Figure 8 It is a partial side cross-sectional view of the internal structure of the second ring sleeve of the present invention.

[0018] Among them, 1. Machine; 2. Base; 3. Anti-slip pad; 4. Guide rail; 5. Drive box; 6. Front plate; 601, Through slot; 7. Quick-lock screw; 8. Winding drum; 801, Positioning hole; 9. First support rod; 10. Clamping tube; 11. Handle; 12. First ring; 1201, Air storage chamber; 13. Yarn guide nozzle; 14. Yarn guide hole; 1401, Blowing hole; 15. Fixing sleeve; 16. Fixing plate; 17. Second support rod; 18 , second ring sleeve; 1801, suction chamber; 19, yarn hole; 20, adsorption hole; 21, partition; 22, first rotating seat; 23, second rotating seat; 24, rotating shaft; 25, torque sensor; 26, tray; 27, drive motor; 28, gear; 29, plunger plate; 30, rubber ring; 31, drive plate; 3101, slide groove; 32, positioning pin; 3201, sliding rod; 33, electric telescopic rod; 34, connecting seat. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: like Figures 1 to 8 As shown, an embodiment of the present invention provides a PLA blended yarn processing device, including a cotton opener, a carding machine, a drawing frame, a spinning machine and a winding device. The winding device includes a machine platform 1, a drive box 5, a winding drum 8, a negative pressure pump, a filter box, an air compressor and an air storage tank. Four sets of feet 2 are fixedly connected to the lower wall of the machine platform 1. The four sets of feet 2 are each provided with an anti-slip pad 3 at one end away from the machine platform 1. The machine platform 1 is prevented from slipping and displacement during use by the four sets of anti-slip pads 3. A front plate 6 is fixedly connected to the upper wall of the machine 1 and near the front wall. A through slot 601 is provided on the inner wall of the front plate 6. The length direction of the through slot 601 is parallel to the left and right direction of the machine 1. A quick-lock screw 7 is provided on the inner wall of the through slot 601. The drive box 5 is slidably connected to the upper wall of the machine 1 through two sets of guide rails 4. The drive box 5 and the front plate 6 are locked by quick-lock screws 7. In this embodiment, the drive boxes 5 are described as a group. In specific implementation, the number of drive boxes 5 can be multiple groups. The multiple groups of drive boxes 5 can all be moved along the length direction of the guide rails 4, and then the distance between the two adjacent groups of drive boxes 5 can be adjusted to accommodate winding drums 8 of different sizes. The second rotating seat 23 and the first rotating seat 22 inner wall are respectively provided with the second rotating seat 23 and the first rotating seat 22 which are opposite to each other in upper and lower directions. The second rotating seat 23 and the inner wall of the first rotating seat 22 are rotatably connected with the rotating shaft 24. A rotating driving structure for driving the rotating shaft 24 to rotate is provided between the partition 21 and the rotating shaft 24. The rotating driving structure includes a driving motor 27 and two sets of gears 28. The driving motor 27 is fixedly connected to the lower wall of the partition 21 and is located at the rear side of the rotating shaft 24. The driving motor 27 extends a shaft that passes through the inner wall of the partition 21 and extends to the top of the partition 21. The two sets of gears 28 are respectively fixedly connected to the outer wall of the extended shaft of the driving motor 27 and the outer wall of the rotating shaft 24, and the outer walls of the two sets of gears 28 are meshed with each other. The driving motor 27 is a common servo motor on the market. The speed of the driving motor 27 can be dynamically adjusted according to the common control device on the market, so as to obtain a reasonable winding speed and tension, which is beneficial to improving the production quality of PLA blended yarn. In order to dynamically detect the rotational torque of the winding drum 8, a torque detection structure for detecting the rotational torque of the rotating shaft 24 is provided between the rotating shaft 24 and the inner lower wall of the driving box 5. The torque detection structure is a torque sensor 25. The torque sensor 25 is fixedly connected to the inner lower wall of the driving box 5. The input shaft of the torque sensor 25 is opposite to the axis of the lower end of the rotating shaft 24, and the input shaft of the torque sensor 25 is fixedly connected to the lower end of the rotating shaft 24 via a coupling. When the winding drum 8 winds the yarn, a certain torque change is generated by the rebound force of the yarn. The torque change is detected by the torque sensor 25 so that the control device can dynamically adjust the speed of the drive motor 27 to obtain a reasonable winding speed and tension. In order to facilitate the disassembly and assembly of the winding drum 8, the upper end of the rotating shaft 24 passes through the upper wall of the drive box 5 and is fixedly connected to the tray 26. The upper wall of the tray 26 is fixedly connected to the clamping tube 10. The winding drum 8 is sleeved on the outer wall of the clamping tube 10. A positioning structure for fixing the axial position of the winding drum 8 is provided between the clamping tube 10 and the winding drum 8. The positioning structure includes a plunger plate 29, two groups of positioning pins 32 and two groups of positioning holes 801. The two groups of positioning holes 801 are both provided on the inner wall of the winding drum 8 and are radially opposite to each other. The plunger plate 29 is slidably connected to the inner wall of the clamping tube 10. The outer wall of the plunger plate 29 is sleeved with a rubber ring 30. The outer wall of the rubber ring 30 is fixed to the clamping tube The inner wall of 10 is pressed tightly, and the upper wall of the plunger plate 29 is provided with a handle 11 for facilitating lifting and pressing. The lower wall of the plunger plate 29 is fixedly connected with two groups of driving plates 31 distributed front and back. The inner walls of the two groups of driving plates 31 are provided with a sliding groove 3101 that passes through front and back. The sliding groove 3101 is V-shaped. The two groups of positioning pins 32 are slidably connected between the opposite sides of the two groups of driving plates 31. The outer wall of the positioning pin 32 facing the axis of the clamping tube 10 is fixedly connected with a sliding rod 3201. The axis line of the sliding rod 3201 is perpendicular to the axis line of the positioning pin 32, and the axial ends of the sliding rod 3201 extend toward the front and rear sides of the positioning pin 32 respectively. The sliding rod 32 01 extends to the outer walls of the front and rear sides of the positioning pin 32 and is slidably connected with the inner walls of a group of slide grooves 3101 respectively. The end of the positioning pin 32 away from the sliding rod 3201 passes through the outer wall of the clamping tube 10. The diameter of the positioning pin 32 coincides with the inner diameter of the positioning hole 801. The winding drum 8 is inserted from the upper wall of the clamping tube 10 until the lower end of the winding drum 8 abuts against the upper wall of the tray 26. A keyway and a flat key are provided between the inner wall of the winding drum 8 and the outer wall of the clamping tube 10 to maintain the displacement insertion direction, so that the insertion direction is consistent each time. After the winding drum 8 is inserted, the plunger plate 29 is driven downward by pressing the handle 11. During the downward movement of the plunger plate 29, the driving plate 31 is driven upward The slide groove 3101 cooperates with the sliding rod 3201 on the positioning pin 32, driving the positioning pin 32 to move in the direction away from the axis of the clamping tube 10, and then inserting into the positioning hole 801, so that the winding drum 8 and the clamping tube 10 are fixed as a whole. The plunger plate 29 is pressed against the inner wall of the clamping tube 10 by the rubber ring 30, generating a damping force for axial movement, keeping the plunger plate 29 from axial movement. When it is necessary to remove the winding drum 8, the plunger plate 29 is lifted upward by the handle 11, driving the two sets of positioning pins 32 to disengage from the positioning holes 801, releasing the fixed state between the winding drum 8 and the clamping tube 10, so that the winding drum 8 can be removed; The rear wall of the drive box 5 is provided with a first support rod 9 through a lifting structure. The lifting structure includes two sets of connecting seats 34 and a set of electric telescopic rods 33. The two sets of connecting seats 34 are distributed up and down and fixedly connected to the rear wall of the drive box 5 in sequence. The electric telescopic rod 33 is fixedly connected between the two sets of connecting seats 34. The first support rod 9 is fixedly connected to the end of the extended shaft of the electric telescopic rod 33. The electric telescopic rod 33 can drive the first support rod 9 to move up and down, thereby driving the yarn guide structure located at the upper end of the first support rod 9 to move up and down. In conjunction with the rotation of the winding drum 8, a uniform winding operation can be achieved. In order to guide the yarn, a yarn guiding structure for guiding the yarn is provided at the upper end of the first support rod 9, and the yarn guiding structure includes a first ring sleeve 12 and a second ring sleeve 18. The first ring sleeve 12 is fixedly connected to the upper end of the first support rod 9, and the axial extension line of the first ring sleeve 12 intersects with the axial line of the winding drum 8. The inner cavity of the first ring sleeve 12 is provided with an air storage cavity 1201, and the inner side wall of the first ring sleeve 12 is fixedly connected to the yarn guide nozzle 13. The inner side wall of the yarn guide nozzle 13 is provided with a yarn guide hole 14 that is through-through from front to back, and the side cross-section of the yarn guide hole 14 is small in front. The back of the yarn guide nozzle 13 is tapered, and the inner wall of the yarn guide nozzle 13 is provided with multiple groups of blowing holes 1401. The yarn guide hole 14 and the air storage cavity 1201 are connected through the multiple groups of blowing holes 1401. The outer wall of the first ring sleeve 12 is connected to the air storage tank through a trachea joint and a hose. The air storage tank is connected to the air compressor through a hose. The outer wall of the first support rod 9 is fixedly connected to a fixed sleeve 15, and the rear wall of the fixed sleeve 15 is fixedly connected to a fixed plate 16. The upper wall of the fixed plate 16 away from the fixed sleeve 15 is fixedly connected to the second support rod 17. The second ring sleeve 18 is fixed Connected to the upper end of the second support rod 17, the inner wall of the second ring sleeve 18 is provided with a yarn hole 19 that is through-through, the yarn hole 19 is colinear with the axis of the yarn guide hole 14, and an air suction cavity 1801 is provided between the outer wall of the circumference of the second ring sleeve 18 and the inner wall of the yarn hole 19. The front wall of the second ring sleeve 18 is provided with multiple groups of adsorption holes 20 that are through-through the interior of the suction cavity 1801. The outer wall of the second ring sleeve 18 is connected to the filter box through an air pipe joint and a hose. The filter box is connected to the negative pressure pump through a hose. By adding multiple groups in the yarn guide hole 14 The blowing hole 1401 guides the yarn while blowing compressed air toward the yarn surface through the blowing hole 1401 to blow away the feathers on the yarn surface and absorb them through the adsorption holes 20 in the second ring sleeve 18. When the compressed air is blown toward the yarn surface, it plays a role in isolating the outer wall of the yarn from the inner wall of the yarn guide hole 14, so that the yarn does not directly contact the inner wall of the yarn guide hole 14. At the same time, it can also cool the yarn to avoid melting of the PLA fiber in the yarn, which can effectively improve the production speed and ensure the production quality of the PLA blended yarn.

[0021] A PLA blended yarn is processed using the above-mentioned PLA blended yarn processing device. The PLA blended yarn is blended with PLA fiber, cotton fiber and nylon fiber. The PLA fiber, cotton fiber and nylon fiber are all selected in specifications of 1.5D×38mm.

[0022] According to the aforementioned production process of a PLA blended yarn processing device, the production process includes the following steps: S1. Raw material pretreatment: PLA fiber raw material packages, cotton fiber raw material packages, and nylon fiber raw material packages are opened and loosened and placed for 12 hours; S2, cotton opening and combing, using cotton openers and carding machines to open and comb PLA fibers, cotton fibers, and nylon fibers; S3, drawing and spinning the PLA fiber, cotton fiber and nylon fiber through a drawing frame and a spinning machine to form a PLA blended yarn; S4, winding, the PLA blended yarn passes through the yarn hole 19 and the yarn guide hole 14 and is wound around the outer wall of the winding drum 8. After the drive motor 27 is started, the winding drum 8 is driven by two sets of gears 28 to rotate and retract the yarn. The electric telescopic rod 33 extends and retracts the shaft, driving the yarn to move back and forth around the winding drum 8 axially to achieve uniform winding; During the yarn guiding process, the air compressor pressurizes the air tank, and the compressed air in the air tank is sent into the air storage chamber 1201 through the hose and the hose connector, and then blown into the interior of the yarn guide hole 14 through the multiple groups of blowing holes 1401. The compressed air blown out through the multiple groups of blowing holes 1401 forms an air film inside the blowing holes 1401, which prevents the yarn from contacting the inner wall of the yarn guide hole 14. At the same time, the compressed air cools the yarn and can blow away the feathers on the yarn surface. During the blowing process, the negative pressure pump draws air into the suction chamber 1801 through the filter box and the hose. The suction chamber 1801 draws air blown backward from the blowing hole 1401 through the multiple groups of adsorption holes 20, and absorbs the feathers blown off the yarn surface. During the winding process, the torque sensor 25 detects the rotational torque of the winding drum 8, and then controls the speed of the drive motor 27 to ensure that the winding speed and tension are within the set range.

[0023] Working principle: The machine 1 uses four sets of anti-skid pads 3 to avoid slipping and displacement during use. In specific implementation, the number of drive boxes 5 can be multiple groups, and the multiple groups of drive boxes 5 can all move along the length direction of the guide rail 4, and then the distance between two adjacent groups of drive boxes 5 can be adjusted to adapt to winding drums 8 of different sizes. The drive motor 27 is a common servo motor on the market. The speed of the drive motor 27 can be dynamically adjusted according to the common control device on the market, so as to obtain a reasonable winding speed and tension, which is beneficial to improving the production quality of PLA blended yarn. When the winding drum 8 winds the yarn, the rebound force of the yarn will produce a certain torque change, which is detected by the torque sensor. 25 implements detection of the torque change so that the control device can dynamically adjust the speed of the drive motor 27 to obtain a reasonable winding speed and tension; the winding drum 8 is inserted from the upper wall of the clamping tube 10 until the lower end of the winding drum 8 abuts against the upper wall of the tray 26. A keyway and a flat key are provided between the inner wall of the winding drum 8 and the outer wall of the clamping tube 10 to maintain the displacement insertion direction, so that the insertion direction is consistent each time. After the winding drum 8 is inserted, the plunger plate 29 is driven downward by pressing the handle 11. During the downward movement of the plunger plate 29, the slide groove 3101 on the driving plate 31 cooperates with the sliding rod 3201 on the positioning pin 32, driving the positioning pin 32 to move away The clamping tube 10 moves in the direction of the axis and then inserts into the positioning hole 801, so that the winding drum 8 and the clamping tube 10 are fixed as one. The plunger plate 29 is pressed against the inner wall of the clamping tube 10 by the rubber ring 30 to generate a damping force for axial movement, which keeps the plunger plate 29 from moving axially. When the winding drum 8 needs to be removed, the plunger plate 29 is lifted upward by the handle 11, driving the two sets of positioning pins 32 to disengage from the positioning holes 801, releasing the fixed state between the winding drum 8 and the clamping tube 10, so that the winding drum 8 can be removed. The electric telescopic rod 33 can drive the first support rod 9 to move up and down, thereby driving the guide rod at the upper end of the first support rod 9 The yarn structure moves up and down, and cooperates with the rotation of the winding drum 8 to achieve uniform winding operation. By adding multiple groups of blowing holes 1401 in the yarn guide hole 14, while guiding the yarn, compressed air is blown toward the yarn surface through the blowing holes 1401 to blow away the feathers on the yarn surface and absorb them through the adsorption holes 20 in the second ring sleeve 18. When the compressed air is blown toward the yarn surface, it plays a role in isolating the outer wall of the yarn from the inner wall of the yarn guide hole 14, so that the yarn does not directly contact the inner wall of the yarn guide hole 14. At the same time, it can also cool the yarn to avoid melting of the PLA fiber in the yarn, which can effectively improve the production speed and ensure the production quality of PLA blended yarn.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A PLA blended yarn processing device, characterized in that: The invention comprises a cotton opener, a carding machine, a drawing machine, a spinning machine and a winding device, wherein the winding device comprises a machine platform (1), a driving box (5), a winding drum (8), a negative pressure pump, a filter box, an air compressor and an air storage tank, wherein the driving box (5) is slidably connected to the upper wall of the machine platform (1) through two sets of guide rails (4), the inner side wall of the driving box (5) is fixedly connected with a partition (21), the lower wall of the partition (21) and the inner upper wall of the driving box (5) are respectively provided with a second rotating seat (23) and a first rotating seat (22) which are opposite to each other in upper and lower directions, the inner walls of the second rotating seat (23) and the first rotating seat (22) are rotatably connected with a rotating shaft (24), and a spacer for rotating the rotating shaft (24) is provided between the partition (21) and the rotating shaft (24). A rotation drive structure for driving the rotating shaft (24) to rotate, a torque detection structure for detecting the rotation torque of the rotating shaft (24) is provided between the rotating shaft (24) and the inner lower wall of the driving box (5), the upper end of the rotating shaft (24) passes through the upper wall of the driving box (5) and is fixedly connected to a tray (26), the upper wall of the tray (26) is fixedly connected to a clamping tube (10), the winding drum (8) is sleeved on the outer wall of the clamping tube (10), a positioning structure for fixing the axial position of the winding drum (8) is provided between the clamping tube (10) and the winding drum (8), the rear wall of the driving box (5) is provided with a first support rod (9) through a lifting structure, and a yarn guiding structure for guiding yarn is provided at the upper end of the first support rod (9); The yarn guide structure comprises a first ring sleeve (12) and a second ring sleeve (18), wherein the first ring sleeve (12) is fixedly connected to the upper end of the first support rod (9), an extension line of the axis of the first ring sleeve (12) intersects with the axis of the winding drum (8), an inner cavity of the first ring sleeve (12) is provided with an air storage cavity (1201), an inner side wall of the first ring sleeve (12) is fixedly connected with a yarn guide nozzle (13), an inner side wall of the yarn guide nozzle (13) is provided with a yarn guide hole (14) which is through-through from front to back, a side view cross section of the yarn guide hole (14) is tapered with a smaller front and a larger rear, an inner wall of the yarn guide nozzle (13) is provided with a plurality of groups of blowing holes (1401), the yarn guide hole (14) and the air storage cavity (1201) are connected through the plurality of groups of blowing holes (1401), an outer wall of the first ring sleeve (12) is connected to an air storage tank through an air pipe joint and a hose, and the air storage tank is connected to an air compressor through a hose.

2. A PLA blended yarn processing device according to claim 1, characterized in that: The rotary drive structure includes a drive motor (27) and two sets of gears (28), wherein the drive motor (27) is fixedly connected to the lower wall of the partition (21) and is located at the rear side of the rotating shaft (24), and the extended shaft of the drive motor (27) passes through the inner wall of the partition (21) and extends above the partition (21), and the two sets of gears (28) are respectively fixedly connected to the outer wall of the extended shaft of the drive motor (27) and the outer wall of the rotating shaft (24), and the circumferential outer walls of the two sets of gears (28) are meshed with each other.

3. A PLA blended yarn processing device according to claim 2, characterized in that: The torque detection structure is a torque sensor (25), and the torque sensor (25) is fixedly connected to the inner lower wall of the drive box (5). The input shaft of the torque sensor (25) is opposite to the axis of the lower end of the rotating shaft (24), and the input shaft of the torque sensor (25) and the lower end of the rotating shaft (24) are fixedly connected via a coupling.

4. A PLA blended yarn processing device according to claim 3, characterized in that: The positioning structure includes a plunger plate (29), two groups of positioning pins (32) and two groups of positioning holes (801), the two groups of positioning holes (801) are both arranged on the inner wall of the winding drum (8) and are arranged in a radially opposite shape, the plunger plate (29) is slidably connected to the inner wall of the clamping tube (10), the outer wall of the plunger plate (29) is provided with a rubber ring (30), the outer wall of the rubber ring (30) is tightly pressed against the inner wall of the clamping tube (10), the upper wall of the plunger plate (29) is provided with a handle (11) for convenient lifting and pressing, the lower wall of the plunger plate (29) is fixedly connected with two groups of driving plates (31) distributed in the front and back, the inner walls of the two groups of driving plates (31) are both provided with a sliding groove (3101) that passes through the front and back, the sliding groove (310 1) is V-shaped, and the two groups of positioning pins (32) are slidably connected between the opposite sides of the two groups of driving plates (31), and the outer wall of one end of the positioning pin (32) facing the axis of the clamping tube (10) is fixedly connected with a sliding rod (3201), the axis of the sliding rod (3201) is perpendicular to the axis of the positioning pin (32), and the axial ends of the sliding rod (3201) extend toward the front and rear sides of the positioning pin (32), respectively, and the outer walls of the sliding rod (3201) extending to the front and rear sides of the positioning pin (32) are slidably connected to the inner side walls of a group of sliding grooves (3101), and the end of the positioning pin (32) away from the sliding rod (3201) passes through the outer wall of the clamping tube (10), and the diameter of the positioning pin (32) coincides with the inner diameter of the positioning hole (801).

5. A PLA blended yarn processing device according to claim 4, characterized in that: The lifting structure comprises two groups of connecting seats (34) and a group of electric telescopic rods (33), the two groups of connecting seats (34) being distributed up and down and fixedly connected to the rear wall of the drive box (5) in sequence, the electric telescopic rod (33) being fixedly connected between the two groups of connecting seats (34), and the first support rod (9) being fixedly connected to the end of the extended shaft of the electric telescopic rod (33).

6. A PLA blended yarn processing device according to claim 5, characterized in that: The outer wall of the first support rod (9) is fixedly connected to a fixed sleeve (15), the rear wall of the fixed sleeve (15) is fixedly connected to a fixed plate (16), the upper wall of the fixed plate (16) away from the fixed sleeve (15) is fixedly connected to a second support rod (17), the second ring sleeve (18) is fixedly connected to the upper end of the second support rod (17), the inner wall of the second ring sleeve (18) is provided with a yarn hole (19) that passes through from front to back, the yarn hole (19) and the yarn guide hole (14) are coaxial, an air suction cavity (1801) is provided between the outer circumferential wall of the second ring sleeve (18) and the inner wall of the yarn hole (19), the front wall of the second ring sleeve (18) is provided with a plurality of adsorption holes (20) that pass through the interior of the air suction cavity (1801), the outer wall of the second ring sleeve (18) is connected to the filter box through an air pipe joint and a hose, and the filter box is connected to the negative pressure pump through the hose.

7. A PLA blended yarn processing device according to claim 6, characterized in that: Four groups of feet (2) are fixedly connected to the lower wall of the machine (1), and anti-slip pads (3) are provided at the ends of the four groups of feet (2) away from the machine (1). A front plate (6) is fixedly connected to the upper wall of the machine (1) near the front wall, and a through slot (601) is provided on the inner wall of the front plate (6). The length direction of the through slot (601) is parallel to the left and right direction of the machine (1). A quick-locking screw (7) is provided on the inner wall of the through slot (601), and the drive box (5) and the front plate (6) are locked by the quick-locking screw (7).

8. A PLA blended yarn, processed using the PLA blended yarn processing device according to any one of claims 1 to 7, characterized in that: The PLA blended yarn is formed by blending PLA fiber, cotton fiber and nylon fiber, and the PLA fiber, cotton fiber and nylon fiber are all selected in specifications of 1.5D×38mm.

9. The production process of a PLA blended yarn processing device according to claim 7, characterized in that: The production process comprises the following steps: S1. Raw material pretreatment: PLA fiber raw material packages, cotton fiber raw material packages, and nylon fiber raw material packages are opened and loosened and placed for 12 hours; S2, cotton opening and combing, using cotton openers and carding machines to open and comb PLA fibers, cotton fibers, and nylon fibers; S3, drawing and spinning the PLA fiber, cotton fiber and nylon fiber through a drawing frame and a spinning machine to form a PLA blended yarn; S4, winding, passing the PLA blended yarn through the yarn hole (19) and the yarn guide hole (14) and then winding it around the outer wall of the winding drum (8), and after the driving motor (27) is started, the winding drum (8) is driven to rotate and retract the yarn through two sets of gears (28), and the electric telescopic rod (33) extends and retracts the shaft, driving the yarn to move back and forth around the winding drum (8) in the axial direction to achieve uniform winding; During the yarn guiding process, the air compressor pressurizes the air storage tank, and the compressed air in the air storage tank is sent into the air storage chamber (1201) through the hose and the hose connector, and then blown into the interior of the yarn guide hole (14) through the multiple groups of blowing holes (1401). The compressed air blown out through the multiple groups of blowing holes (1401) forms an air film inside the blowing hole (1401), so as to prevent the yarn from contacting the inner wall of the yarn guide hole (14). At the same time, the yarn is cooled by the compressed air, and feathers on the surface of the yarn can be blown away. During the blowing process, the negative pressure pump draws air into the suction chamber (1801) through the filter box and the hose, and the suction chamber (1801) draws air blown backward from the blowing hole (1401) through the plurality of adsorption holes (20), thereby sucking away the feathers blown off the yarn surface; During the winding process, the torque sensor (25) is used to detect the rotational torque of the winding drum (8), and then the rotation speed of the driving motor (27) is controlled to ensure that the winding speed and tension are within the set range.

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