A double-color composite yarn raising device and raising process for raising treatment

Abstract

The application relates to the technical field of napping devices, and discloses a napping device and a napping process for double-color composite yarn napping treatment, which comprises a rack, a dust remover fixedly installed on the rack, a napping cylinder group fixedly installed at one end of the rack, guide rails formed at the other end of the rack, fixing plates fixedly installed at the two ends of the guide rails, driving strips slidingly connected between the two fixing plates, an outer cylinder slidingly connected between the two guide rails, an inner cylinder rotatingly connected in the outer cylinder, wedge-shaped rods movably connected to the inner ring of the inner cylinder, the wedge-shaped rods abutting against the driving strips, first air cylinders fixedly installed at the other end of the rack, and transmission rods fixedly connected to one end of the first air cylinders. The napping device for double-color composite yarn napping treatment is used for releasing yarns outward and passively unwinding under the action of the excessive pressure of the outer yarn layer, so that stress release and yarn layer relaxation after the initial napping are realized, and the product control after yarn production is improved.

Description

Technical Field

[0001] This invention relates to the field of napping equipment technology, specifically to a napping device and napping process for napping two-color composite yarns. Background Technology

[0002] In simple terms, the working principle of a napping machine is to use a high-speed rotating roller with densely packed steel needles to "hook" the fibers from the surface of the yarn or fabric, forming a layer of nap. During napping, the fabric or yarn will wrap around the cylinder surface along a specific path. The key to the whole process is the speed difference: the linear speed of the napping roller surface is faster than the traveling speed of the fabric or yarn. It is this speed difference that makes the needle tips "comb" across the fiber surface, rather than moving synchronously. The needle rollers work together: on a large cylinder, curved and straight needle rollers are arranged alternately. They each have an independent transmission system, allowing them to rotate at different speeds and directions according to process requirements while revolving around the cylinder. By precisely controlling these speeds, the hooking action of the curved needles can be made more intense or gentler, and the combing action of the straight needles can be just right.

[0003] However, in practice, we found that if the yarn wound too thickly on the roller increases the friction between the yarns, the inner layer of yarn will be subjected to enormous radial pressure, tightly "clamping" the yarn onto the paper tube or roller mandrel. At this point, the interlayer friction, which should be relatively sliding, becomes a huge resistance, making it difficult to unwind the yarn, and even causing "sticking" or "twisting" under strong pulling. Therefore, when the napping roller starts or changes speed suddenly, this heavy yarn tube will be "slow to respond"—it cannot keep up with the change in the roller's speed. This lag can cause the yarn to be instantly overstretched (tension peak surge) or instantly relaxed (tension trough), resulting in uneven pile lengths. Existing solutions generally include two methods: setting "fixed length / fixed weight": 1. Strictly control the maximum winding diameter of the yarn bobbin (usually controlled within a specific multiple of the outer diameter of the paper tube, such as not exceeding 180mm), and immediately switch to an empty tube once the set length is reached; 2. If some yarns must be made into large packages, the tension sensor and overfeed roller on the napping machine need to be reset. As the roll diameter increases, the unwinding tension is automatically reduced to compensate for the increased friction.

[0004] However, all of these methods have a significant drawback: 1. Frequent bobbin changes lead to downtime and losses: Small spools mean the yarn is used up quickly, requiring frequent machine stops to drop the bobbins. Each restart causes the napping machine's needle rollers to experience an "empty to loaded" impact, directly resulting in a significantly worse napping effect at the joint (where new and old yarns meet), creating a section of "weak nap" or "smooth nap" waste yarn; 2. The compensation system frequently accelerates and decelerates to keep up with the rotational speed. This causes high-frequency oscillations in the tension of the entire yarn path (from the bobbin to the napping zone), resulting in a periodic "long-short-long" pattern of nap length. We propose a napping device and process for napping two-color composite yarns. Summary of the Invention

[0005] The purpose of this invention is to provide a napping device and napping process for napping two-color composite yarns, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a napping device for napping two-color composite yarn, comprising a frame, a dust collector fixedly installed on the frame, a napping cylinder assembly fixedly installed at one end of the frame, guide rails on both sides of the other end of the frame, fixed plates fixedly installed at both ends of the guide rails, a drive bar slidably connected between the two fixed plates, an outer cylinder slidably connected between the two guide rails, an inner cylinder rotatably connected inside the outer cylinder, a wedge rod movably connected to the inner ring of the inner cylinder, the wedge rod abutting against the drive bar, a first cylinder fixedly installed on both sides of the other end of the frame, a transmission rod fixedly connected to one end of the first cylinder, a second cylinder fixedly installed on opposite surfaces of one end of the frame, a retaining rail fixedly installed between the two second cylinders, the top of the retaining rail extending to both ends of the outer cylinder, a control device for adjusting the radial pressure of the yarn on the outer cylinder after winding connected between the inner cylinders, a second motor connected to one end of the inner cylinder, the output shaft of the second motor fixedly connected to the inner ring of the inner cylinder.

[0007] Preferably, the control device includes a push plate slidably disposed at one end of a wedge-shaped rod, a spring fixedly connected to one side of the push plate, one end of the spring being fixedly connected to the inner cylinder, a positioning disk being fixedly installed on the inner ring of the outer cylinder, the inner cylinder and the positioning disk being rotatably connected, multiple fourth magnets being fixedly installed at both ends of the outer ring of the inner cylinder, and multiple third magnets being fixedly installed at both ends of the inner ring of the outer cylinder, the third magnets and the fourth magnets having opposite magnetic properties and attracting each other.

[0008] Preferably, positioning cylinders are rotatably connected to both sides of the frame, a third gear is fixedly installed on the outer ring of one of the positioning cylinders, inner side plates are detachably connected to the inner rings of both positioning cylinders, a fixed cylinder is fixedly connected between the two inner side plates, a limit rail is provided on each inner side plate, a movable winding drum is slidably connected between the two limit rails, a first motor is fixedly installed on the frame near the third gear, a first gear is sleeved on the output shaft of the first motor, and the first gear and the third gear mesh together.

[0009] Preferably, a fixed base is fixedly installed on the outside of the frame, and the inner side plate and the fixed base are rotatably connected.

[0010] Preferably, the outer ring of the inner side plate is fixedly connected with a plurality of second magnets in a ring shape, and the inner ring of the positioning cylinder is fixedly installed with a plurality of first magnets, and the first magnets and second magnets are in sliding contact.

[0011] Preferably, a movable rod is fixedly connected to the bottom of the transmission rod, a first rack is fixedly installed at one end of the movable rod, a rotating handle is rotatably connected to the outside of the frame near the first rack, a rotating block is fixedly connected to the middle of the rotating handle, a second gear is fixedly connected to the bottom of the rotating handle, the second gear meshes with the first rack, and a limit rod is fixedly connected to one end of the rotating block.

[0012] Preferably, the inner side plate is provided with a plurality of limiting grooves at equal intervals, and the size of one side of the limiting rod matches the opening size of the limiting groove.

[0013] Preferably, a pair of third cylinders are fixedly installed on the inner side of the middle of the frame, and a wire feeding plate is connected at the top between the two third cylinders. A center plate is fixedly installed on both sides of the middle of the frame. A second rack is fixedly connected to both ends of the wire feeding plate. A transition gear is rotatably connected to the middle of the center plate. A third rack is slidably connected to one side of each center plate. A tension bar is fixedly connected between the two third racks. The second rack is connected to the third rack through the transition gear.

[0014] Preferably, the fixed cylinder, the movable winding cylinder, and the outer cylinder are made of anti-slip material and are treated with anti-static agents.

[0015] Preferably, the napping process includes: a) preliminary napping step: By manually pre-traction, the two-color yarn is passed through the bottom of the napping drum assembly and pulled from the top of the fixed drum to the gap between the fixed drum and the moving winding drum. Then the yarn is wound out through the bottom of the moving winding drum and finally coiled on the outer ring of the outer drum. The second motor is turned on to rotate and the yarn is napped, pulled and collected. b. Interference step: After the outer yarn of the outer cylinder becomes thicker, the weight of the yarn layer is detected. A pressure sensor is installed at the end of the outer cylinder. When the pressure between the layers of the outer cylinder exceeds the threshold, the third cylinder is automatically activated to rise. The yarn guide plate and tension bar move in opposite directions to comb and segment the yarn, destroy the tension of the taut yarn, shorten the straightened length, and the excess rope length will absorb the tensile deformation, thus reducing the tension. c. Compensation steps: The first cylinder is started and retracted, which drives the drive bar to rise, causing the wedge rod to retract into the inner cylinder. The push plate and the positioning plate abut against each other, separating the inner cylinder and the outer cylinder. This causes the rotation of the second motor to produce a separate rotation on the inner cylinder. If the pressure on the outer ring of the outer cylinder is too high, the yarn is actively unwound, completing the initial unwinding after the initial roughening. d. Assisted unwinding steps: When the unwinding force of the outer cylinder is insufficient, the first motor is turned on to rotate, causing the third gear to rotate and complete the winding work between the fixed cylinder and the moving winding drum, so that the yarn on the outer cylinder is peeled onto the fixed cylinder and the moving winding drum, while the yarn at the bottom of the napping drum group is napped at the initial speed. Secondary steps of the auxiliary unwinding process: The second cylinder is synchronously driven to extend, causing the outer cylinder to descend on the guide rail, and the yarn on the outer cylinder is discharged onto the fixed cylinder and the moving winding cylinder. e. Unwinding and uninterrupted winding steps: After sufficient yarn is wound on the fixed cylinder and the moving winding drum, the first cylinder is driven to extend forward, the limit rod cuts into the limit groove to brake the positioning cylinder, and at the same time the transmission rod and the drive bar separate, so that the push plate and the positioning plate lose contact. The outer cylinder and the inner cylinder rotate synchronously, so that the yarn wound on the fixed cylinder and the moving winding drum rolls on its own and is pulled back to the outer ring of the outer cylinder, completing the yarn fuzzing work.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention alleviates the internal stress accumulation of the outer cylinder caused by excessive yarn layer thickness, and the system performs initial unwinding compensation. The first cylinder retracts backward, driving the drive bar to slide and rise between two fixed plates via the transmission rod, allowing the wedge rod to enter the inner cylinder. This action temporarily separates the inner and outer cylinders on the transmission chain. At this time, the rotational power of the second motor is only transmitted to the inner cylinder, while the outer cylinder becomes free. Under the excessive pressure of its outer yarn layer, the yarn actively releases outward and undergoes passive unwinding, thus completing the stress release and yarn layer relaxation after the initial roughening, improving quality control after yarn production. The yarn is drawn from the outer bobbin to a transitional winding between the fixed bobbin and the moving winding drum, gradually stripping the yarn from the outer bobbin. During this process, the yarn at the bottom of the napping drum group continues its napping operation at its initial speed, ensuring uninterrupted main production. On the other hand, as a secondary reinforcement method to assist unwinding, a second cylinder is simultaneously extended, pushing the outer bobbin vertically downwards along the guide rail. Utilizing the relative misalignment created by the displacement, the yarn wound on the outer bobbin is forcibly and completely discharged onto the fixed bobbin and the moving winding drum, thus completely resolving the unwinding jamming problem. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the overall planar structure of the present invention; Figure 4 This is a schematic diagram of the inner side plate and the third gear structure of the present invention; Figure 5 This is a schematic diagram of the outer cylinder and rail structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the outer cylinder of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the wire feeding plate and tension bar structure of the present invention; Figure 9 This is a schematic diagram of the fixed cylinder and movable winding cylinder structure of the present invention.

[0018] In the diagram: 1-Frame; 2-Dust collector; 3-Texturing roller assembly; 4-Guide rail; 5-Fixing plate; 6-Drive bar; 7-First cylinder; 8-Transmission rod; 9-Moving rod; 10-First rack; 11-Fixing base; 12-First motor; 13-First gear; 14-Center plate; 15-Rotating block; 1501-Limit rod; 16-Second gear; 17-Third gear; 18-First magnet; 19-Second magnet; 20-Inner side plate; 2 1-Limiting groove; 22-Limiting rail; 23-Second motor; 24-Second cylinder; 25-Clamping rail; 26-Outer cylinder; 27-Wedge rod; 28-Inner cylinder; 29-Third magnet; 30-Fourth magnet; 31-Spring; 32-Push plate; 33-Positioning plate; 34-Third cylinder; 35-Wire feeding plate; 36-Tension bar; 37-Second rack; 38-Third rack; 39-Transition gear; 40-Fixed cylinder; 41-Moving winding drum. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see the appendix Figure 1-9 This invention provides a specific technical solution: a napping device for napping two-color composite yarn, comprising a frame 1, a dust collector 2 fixedly mounted on the frame 1, a napping cylinder group 3 fixedly mounted at one end of the frame 1, guide rails 4 on both sides of the other end of the frame 1, fixing plates 5 fixedly mounted at both ends of the guide rails 4, a drive bar 6 slidably connected between the two fixing plates 5, an outer cylinder 26 slidably connected between the two guide rails 4, an inner cylinder 28 rotatably connected inside the outer cylinder 26, a wedge-shaped rod 27 movably connected to the inner ring of the inner cylinder 28, the wedge-shaped rod 27 abutting against the drive bar 6, and the other two sides of the frame 1 being fixed. A first cylinder 7 is installed, with a transmission rod 8 fixedly connected to one end. Second cylinders 24 are fixedly installed on opposite sides of one end of the frame 1. A guide rail 25 is fixedly installed between the two second cylinders 24, with the top of the guide rail 25 extending to both ends of the outer cylinder 26. A control device for adjusting the radial pressure of the yarn on the outer cylinder 26 after winding is connected between the inner cylinders 28. A second motor 23 is connected to one end of the inner cylinder 28, and the output shaft of the second motor 23 is fixedly connected to the inner ring of the inner cylinder 28. Initially, during operation, a manual pre-traction method is used to sequentially pass the two-color yarn through the lower area of ​​the napping drum group 3. Subsequently, the yarn is introduced through the top surface of the fixed drum 40 and precisely inserted into the annular gap between the fixed drum 40 and the moving winding drum 41. After the yarn exits from the bottom of the moving winding drum 41, it finally coils and adheres to the outer ring surface of the outer cylinder 26. After confirming the yarn path is correct, the second motor 23 is started to drive the outer cylinder 26 to rotate, thereby applying stretching and friction to the yarn, achieving initial napping and unwinding. To alleviate the internal stress accumulation caused by the excessive yarn layer in the outer cylinder 26, the system performs initial unwinding compensation. In this step, the first cylinder 7 is started to retract backward, driving the drive bar 6 to slide and rise between the two fixed plates 5 through the transmission rod 8, so that the wedge rod 27 enters the inner cylinder 28. This action achieves temporary separation of the inner cylinder 28 and the outer cylinder 26 on the transmission chain. At this time, the rotational power of the second motor 23 is only transmitted to the inner cylinder 28, and the outer cylinder 26 turns to a free state. Under the action of excessive pressure on its outer yarn layer, the yarn actively releases outward and generates passive unwinding, thereby completing the stress release and yarn layer relaxation after the initial napping, improving the quality control after yarn production.

[0021] Furthermore, the control device includes a push plate 32 slidably disposed at one end of the wedge rod 27. A spring 31 is fixedly connected to one side of the push plate 32. One end of the spring 31 is fixedly connected to the inner cylinder 28. A positioning disk 33 is fixedly installed on the inner ring of the outer cylinder 26. The inner cylinder 28 and the positioning disk 33 are rotatably connected. Multiple fourth magnets 30 are fixedly installed at both ends of the outer ring of the inner cylinder 28. Multiple third magnets 29 are fixedly installed at both ends of the inner ring of the outer cylinder 26. The third magnets 29 and the fourth magnets 30 are attracted together by opposite magnetic properties. When the wedge rod 27 moves towards the inner ring of the inner cylinder 28, the spring 31 is stretched, the push plate 32 and the positioning disk 33 come into contact, and the third magnets 29 and the fourth magnets 30 separate. The inner cylinder 28 and the outer cylinder 26 lose their mutual restraint, allowing the yarn to be unwound by a reverse force on the outer cylinder 26.

[0022] Furthermore, positioning cylinders are rotatably connected to both sides of the frame 1. A third gear 17 is fixedly installed on the outer ring of one of the positioning cylinders. Inner side plates 20 are detachably connected to the inner rings of both positioning cylinders. A fixed cylinder 40 is fixedly connected between the two inner side plates 20. Each inner side plate 20 has a limit rail 22. A movable winding drum 41 is slidably connected between the two limit rails 22. A first motor 12 is fixedly installed on the frame 1 near the third gear 17. A first gear 13 is sleeved on the output shaft of the first motor 12. The first gear 13 and the third gear 17 mesh together. The frame 1 is externally fixed... A fixed base 11 is fixedly installed, and the inner side plate 20 is rotatably connected to the fixed base 11. The fixed cylinder 40, the movable winding cylinder 41, and the outer cylinder 26 are made of anti-slip material and have undergone anti-static treatment. Multiple second magnets 19 are fixedly connected to the outer ring of the inner side plate 20 in an annular shape, and multiple first magnets 18 are fixedly installed on the inner ring of the positioning cylinder. The first magnets 18 and second magnets 19 slide in contact, and the magnetic poles of the first magnets 18 and second magnets 19 are opposite, so they attract each other. When the outer cylinder 26 has insufficient passive unwinding force due to the yarn being wound too tightly, the system activates the auxiliary unwinding mechanism. On one hand, the first motor 12 is turned on to drive the first gear 13 to drive the third gear 17 to... Figure 3 The yarn is rotated clockwise in the indicated direction, drawing it from the outer cylinder 26 to the fixed cylinder 40 and the moving winding drum 41 for transitional winding, gradually stripping the yarn from the outer cylinder 26. During this process, the yarn at the bottom of the napping drum group 3 continues to nap at its initial speed, ensuring uninterrupted main production. On the other hand, as a secondary reinforcement method to assist unwinding, the second cylinder 24 is simultaneously driven to extend, pushing the outer cylinder 26 vertically downward along the guide rail 4. Utilizing the relative misalignment generated by the displacement, the yarn wound on the outer cylinder 26 is forcibly and completely discharged onto the fixed cylinder 40 and the moving winding drum 41, thus completely resolving the unwinding jamming problem.

[0023] Furthermore, a movable rod 9 is fixedly connected to the bottom of the transmission rod 8, and a first rack 10 is fixedly installed at one end of the movable rod 9. A rotating handle is rotatably connected to the outside of the frame 1 near the first rack 10. A second gear 16 is fixedly connected to the bottom of the rotating handle. The second gear 16 meshes with the first rack 10. A rotating block 15 is fixedly connected to the middle of the rotating handle. A limit rod 1501 is fixedly connected to one end of the rotating block 15. Multiple limit grooves 21 are equally spaced on the inner side plate 20. The size of the opening of the limit rod 1501 and the limit groove 21 are matched. When a sufficient amount of yarn is temporarily stored on the fixed cylinder 40 and the movable winding cylinder 41, the system performs a reset and cyclic winding action. First, the first cylinder 7 extends forward, driving the first rack 10 to rotate the second gear 16, causing the limiting rod 1501 to engage with the limiting groove 21, thus braking and locking the positioning cylinder and separating the first magnet 18 and the second magnet 19. Simultaneously, the transmission rod 8 separates from the drive bar 6, releasing the contact between the push plate 32 and the positioning disc 33, and causing the outer cylinder 26 and inner cylinder 28 to resume synchronous rotation. In this state, the yarn temporarily wound on the fixed cylinder 40 and the moving winding drum 41 is automatically pulled back and re-wound evenly to the outer ring of the outer cylinder 26 using its own rolling effect. This step achieves seamless cyclic transfer of yarn between the auxiliary unwinding device and the main winding drum, completing uninterrupted continuous napping production while ensuring stable yarn quality and tension. It is worth mentioning that limit rails 22 are provided on the inner side plates 20. When the moving winding drum 41 rotates with the positioning drum, the distance between the moving winding drum 41 and the fixed drum 40 decreases as the winding thickness increases and the rotation amplitude increases. This allows the position of the inner core of the wound yarn layer to be dynamically adjusted, making the yarn layer easier to become fluffy and reducing the scratching between yarn layers.

[0024] Furthermore, a pair of third cylinders 34 are fixedly installed on the inner side of the middle of the frame 1. A yarn feeding plate 35 is connected at the top between the two third cylinders 34. A center plate 14 is fixedly installed on both sides of the middle of the frame 1. A second rack 37 is fixedly connected to both ends of the yarn feeding plate 35. A transition gear 39 is rotatably connected to the middle of the center plate 14. A third rack 38 is slidably connected to one side of each center plate 14. A tension bar 36 is fixedly connected between the two third racks 38. The second rack 37 is connected to the third rack 38 through the transmission of the transition gear 39. As the napping process continues, the thickness of the yarn layer wound on the outside of the outer cylinder 26 gradually increases. To ensure constant yarn tension and prevent quality defects caused by overload, an active interference mechanism is introduced. Specifically, a pressure sensor (an existing device, not shown, which can be installed during installation) installed at the end of the outer cylinder 26 monitors the radial pressure on the yarn layer in real time. When the pressure between yarn layers exceeds a preset threshold, the system automatically triggers the third cylinder 34 to rise, driving the yarn spreading plate 35 and tension bar 36 to move in opposite directions. This action physically combs and isolates the tightly packed yarns, effectively breaking the tension concentration caused by the yarns being taut due to multiple layers of winding. By shortening the effective straightening length of the yarn and releasing excess deformation, the yarn tension is reduced to within the permissible range, thus preventing yarn breakage or package deformation due to excessive tension.

[0025] a. The napping process includes the preliminary napping step: By manually pre-pulling, the two-color yarn is passed through the bottom of the napping drum group 3 and pulled from the top of the fixed drum 40 to the gap between the fixed drum 40 and the movable winding drum 41. Then the yarn is wound out through the bottom of the movable winding drum 41 and finally coiled around the outer ring of the outer drum 26. The second motor 23 is turned on to rotate and the yarn is napped, pulled and collected. b. Interference step: After the outer yarn of the outer cylinder 26 becomes thicker, the weight of the yarn layer is detected. A pressure sensor is installed at the end of the outer cylinder 26. When the pressure between the layers of the outer cylinder 26 exceeds the threshold, the third cylinder 34 is automatically activated to rise. The yarn feeding plate 35 and the tension bar 36 move in opposite directions to comb and segment the yarn, destroy the tension of the taut yarn, shorten the straightened length, and the excess rope length will absorb the tensile deformation, and the tension will decrease. c. Compensation steps: The first cylinder 7 is started and retracted, which causes the transmission rod 8 to drive the drive bar 6 to rise, so that the wedge rod 27 retracts into the inner cylinder 28. The push plate 32 and the positioning plate 33 abut against each other, so that the inner cylinder 28 and the outer cylinder 26 are separated, so that the rotation of the second motor 23 only produces a single rotation of the inner cylinder 28. The outer ring pressure of the outer cylinder 26 is too large, so the yarn is actively unwound, completing the initial unwinding after the initial napping. d. Assisted unwinding steps: When the unwinding force of the outer cylinder 26 is insufficient, the first motor 12 is turned on to rotate, causing the third gear 17 to rotate, and the yarn is wound between the fixed cylinder 40 and the moving winding drum 41, so that the yarn on the outer cylinder 26 is peeled onto the fixed cylinder 40 and the moving winding drum 41, while the yarn at the bottom of the napping drum group 3 is napped at the initial speed. Secondary step of the auxiliary unwinding process: synchronously drive the second cylinder 24 to extend, so that the outer cylinder 26 descends on the guide rail 4, and discharges the yarn on the outer cylinder 26 onto the fixed cylinder 40 and the moving winding cylinder 41. e. Unwinding and uninterrupted winding steps: After sufficient yarn is wound on the fixed cylinder 40 and the moving winding drum 41, the first cylinder 7 is driven to extend forward, the limit rod 1501 cuts into the limit groove 21 to brake the positioning cylinder, and at the same time the transmission rod 8 and the drive bar 6 separate, so that the push plate 32 and the positioning plate 33 lose contact. The outer cylinder 26 and the inner cylinder 28 rotate synchronously, so that the yarn wound on the fixed cylinder 40 and the moving winding drum 41 rolls on its own and is pulled back to the outer ring of the outer cylinder 26 to complete the yarn fuzzing work.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A napping device for napping two-color composite yarn, comprising a frame (1), characterized in that: A dust collector (2) is fixedly installed on the frame (1). A brushing roller assembly (3) is fixedly installed at one end of the frame (1). Guide rails (4) are provided on both sides of the other end of the frame (1). Fixed plates (5) are fixedly installed at both ends of the guide rails (4). A drive bar (6) is slidably connected between the two fixed plates (5). An outer cylinder (26) is slidably connected between the two guide rails (4). An inner cylinder (28) is rotatably connected inside the outer cylinder (26). A wedge rod (27) is movably connected to the inner ring of the inner cylinder (28). The wedge rod (27) abuts against the drive bar (6). The other end of the frame (1) is... A first cylinder (7) is fixedly installed on both sides of the end. A transmission rod (8) is fixedly connected to one end of the first cylinder (7). A second cylinder (24) is fixedly installed on the opposite side of one end of the frame (1). A retaining rail (25) is fixedly installed between the two second cylinders (24). The top of the retaining rail (25) extends to both ends of the outer cylinder (26). A control device for adjusting the radial pressure of the yarn on the outer cylinder (26) after winding is connected between the inner cylinders (28). A second motor (23) is connected to one end of the inner cylinder (28). The output shaft of the second motor (23) is fixedly connected to the inner ring of the inner cylinder (28).

2. The napping device for raising two-color composite yarn according to claim 1, characterized in that: The control device includes a push plate (32) slidably disposed at one end of a wedge rod (27). A spring (31) is fixedly connected to one side of the push plate (32). One end of the spring (31) is fixedly connected to the inner cylinder (28). A positioning disk (33) is fixedly installed on the inner ring of the outer cylinder (26). The inner cylinder (28) and the positioning disk (33) are rotatably connected. Multiple fourth magnets (30) are fixedly installed at both ends of the outer ring of the inner cylinder (28). Multiple third magnets (29) are fixedly installed at both ends of the inner ring of the outer cylinder (26). The third magnets (29) and the fourth magnets (30) are attracted to each other with opposite magnetic properties.

3. The napping device for raising two-color composite yarn according to claim 2, characterized in that: The frame (1) is rotatably connected to both sides of the positioning cylinder. A third gear (17) is fixedly installed on the outer ring of one of the positioning cylinders. The inner rings of the two positioning cylinders are detachably connected to the inner side plates (20). A fixed cylinder (40) is fixedly connected between the two inner side plates (20). A limit rail (22) is opened on each inner side plate (20). A movable winding drum (41) is slidably connected between the two limit rails (22). A first motor (12) is fixedly installed on the frame (1) near the third gear (17). A first gear (13) is sleeved on the output shaft of the first motor (12). The first gear (13) and the third gear (17) mesh together.

4. The napping device for raising two-color composite yarn according to claim 3, characterized in that: The frame (1) is externally fixedly mounted with a fixed seat (11), and the inner side plate (20) and the fixed seat (11) are rotatably connected.

5. The napping device for raising two-color composite yarn according to claim 4, characterized in that: The outer ring of the inner side plate (20) is fixedly connected with a plurality of second magnets (19), and the inner ring of the positioning cylinder is fixedly installed with a plurality of first magnets (18). The first magnets (18) and the second magnets (19) slide in contact.

6. The napping device for raising two-color composite yarn according to claim 5, characterized in that: The bottom of the transmission rod (8) is fixedly connected to a moving rod (9), and a first rack (10) is fixedly installed at one end of the moving rod (9). A rotating handle is rotatably connected to the outside of the frame (1) near the first rack (10). A second gear (16) is fixedly connected to the bottom of the rotating handle. The second gear (16) meshes with the first rack (10). A rotating block (15) is fixedly connected to the middle of the rotating handle. A limit rod (1501) is fixedly connected to one end of the rotating block (15).

7. A napping device for raising nap on two-color composite yarn according to claim 6, characterized in that: Multiple limiting grooves (21) are equally spaced on the inner side plate (20), and the size of the opening of the limiting rod (1501) and the limiting groove (21) are matched.

8. The napping device for raising two-color composite yarn according to claim 1, characterized in that: A pair of third cylinders (34) are fixedly installed on the inner side of the middle part of the frame (1). A wire feeding plate (35) is connected at the top between the two third cylinders (34). A central plate (14) is fixedly installed on both sides of the middle part of the frame (1). A second rack (37) is fixedly connected to both ends of the wire feeding plate (35). A transition gear (39) is rotatably connected to the middle of the central plate (14). A third rack (38) is slidably connected to one side of each central plate (14). A tension bar (36) is fixedly connected between the two third racks (38). The second rack (37) is connected to the third rack (38) through the transition gear (39).

9. A napping device for raising nap on two-color composite yarn according to claim 3, characterized in that: The fixed cylinder (40), the movable winding cylinder (41), and the outer cylinder (26) are made of anti-slip material and are treated with anti-static agents.

10. The process method involved in using the napping device for raising two-color composite yarn according to claims 1-9, characterized in that: a. Preliminary brushing steps: By manually pulling the yarn beforehand, the two-color yarn is passed through the bottom of the napping drum group (3), and pulled from the top of the fixed drum (40) to the gap between the fixed drum (40) and the moving winding drum (41). Then the yarn is wound out through the bottom of the moving winding drum (41) and finally coiled around the outer ring of the outer drum (26). The second motor (23) is turned on to rotate and the yarn is napped, pulled and collected. b. Interference steps: After the outer yarn of the outer cylinder (26) becomes thicker, the weight of the yarn layer is detected. A pressure sensor is installed at the end of the outer cylinder (26). After the pressure between the layers of the outer cylinder (26) exceeds the threshold, the third cylinder (34) is automatically started to rise. The yarn guide plate (35) and tension bar (36) move in opposite directions to comb and segment the yarn, destroy the tension of the taut yarn, shorten the straightened length, and the excess rope length will absorb the stretching deformation, and the tension will decrease. c. Compensation steps: Start the first cylinder (7) to retract backward, so that the transmission rod (8) drives the drive bar (6) to rise, so that the wedge rod (27) retracts into the inner cylinder (28), the push plate (32) and the positioning plate (33) abut against each other, so that the inner cylinder (28) and the outer cylinder (26) are separated, so that the rotation of the second motor (23) only generates a separate rotation of the inner cylinder (28), the pressure on the outer ring of the outer cylinder (26) is too large, and the yarn is actively unwound, completing the initial unwinding after the initial roughening; d. Assisted unwinding steps: When the unwinding force of the outer cylinder (26) is insufficient, the first motor (12) is turned on to rotate, so that the third gear (17) rotates and the yarn is wound between the fixed cylinder (40) and the moving winding drum (41), so that the yarn on the outer cylinder (26) is peeled onto the fixed cylinder (40) and the moving winding drum (41), while the yarn at the bottom of the napping drum group (3) is napped at the initial speed; Secondary step of the auxiliary unwinding process: The second cylinder (24) is synchronously driven to extend, causing the outer cylinder (26) to descend on the guide rail (4), discharging the yarn on the outer cylinder (26) onto the fixed cylinder (40) and the moving winding drum (41). e. Unwinding and uninterrupted winding steps: After a sufficient amount of yarn is wound on the fixed cylinder (40) and the moving winding cylinder (41), the first cylinder (7) is driven to extend forward, and the limiting rod (1501) cuts into the limiting groove (21) to brake the positioning cylinder. At the same time, the transmission rod (8) and the drive bar (6) separate, so that the push plate (32) and the positioning plate (33) lose contact. The outer cylinder (26) and the inner cylinder (28) rotate synchronously, so that the yarn wound on the fixed cylinder (40) and the moving winding cylinder (41) rolls on its own and is pulled back to the outer ring of the outer cylinder (26) to complete the yarn fuzzing work.

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