A directional flow type micro-fraction embedded composite spinning device and method and application

Abstract

The application provides a directional drainage type micro-different embedded composite spinning method, device and application, and aims to solve the problems of short fiber escape and scattering in traditional embedded spinning, and improve the comprehensive performance of yarns. The spinning device of the application comprises a feeding unit, a micro-different embedded composite spinning unit and a winding unit. The feeding unit is composed of a filament feeding unit and a short fiber feeding unit. The micro-different embedded composite spinning unit is composed of an auxiliary conveying component, a transmission gear and a negative pressure adsorption conveying component, the short fiber sliver is effectively held by using a negative pressure suction system, and the stable inter-twist of the short fiber sliver and the filament on the suction plate is ensured. The winding unit is responsible for winding the micro-different embedded composite yarn into a tube. Compared with the prior art, the spinning method of the application realizes the high-speed industrial production of yarns by accurately controlling the feeding and adsorption of fibers, while the strength, hairiness and evenness performance of the yarns are ensured, the production cost is reduced, and the application is suitable for a wide market.

Description

Technical Field

[0001] This invention relates to the field of textile processing technology, and in particular to a method, apparatus and application of directional flow-guided differential embedding composite spinning. Background Technology

[0002] Embedded spinning is a novel ring spinning technology. The specific spinning method is as follows: a double roving is fed into the bell mouth of the ring spinning machine, and a double filament is fed into the front roller; the roving is arranged in parallel, while the filaments are distributed on both sides. Due to the twisting action of the spinning frame, the yarn twist is transferred from the roving to the two filaments. At the exit of the front roller of the ring spinning machine, the left roving twists with the left filament, and the right filament twists with the right filament. Finally, the two twisted yarns are combined into one yarn and wound onto the bobbin. The principle of this technology is based on traditional ring spinning technology, but by increasing the twisting process of the filaments and staple fibers, it achieves a relatively relaxed restriction on the content of short fibers and the shortest fiber length in the fiber sliver, thus providing a new approach to the use of short fiber raw materials. The application of inlay spinning technology not only allows for the spinning of finer yarns from lower-grade raw materials, but also enables the development of new yarns through appropriate adjustments based on its principles, such as ultrafine yarns, multi-component yarns, fancy yarns, wrapped yarns, and core-spun yarns. Compared to traditional ring spinning, inlay spinning technology can also reduce yarn hairiness and improve yarn evenness. During inlay spinning, the spacing and tension between the filaments and slivers have a significant impact on the yarn's structure and properties. Simultaneously, the fiber's length, fineness, and strength also affect the effectiveness of inlay spinning.

[0003] However, in conventional embedded spinning, the yarn-forming zone is located in front of the front roller nip, with the two filaments and two slivers suspended in the air, dynamically twisting into yarn. Under these conditions, changes in the size of the ring spinning machine's air ring and the spinning tension cause dynamic vibrations and turbulence in the components of the yarn-forming zone. This results in unstable twisting between the sliver fibers and the filaments, and the sliver fibers are easily sucked away by the negative pressure flute, leading to decreased fiber utilization, worsened yarn evenness, and increased yarn defects. How to prevent sliver fibers from getting tangled in the twisting triangle of the filaments and being suspended or exposed in the air, and how to prevent the fibers on the sliver from lacking adhesion when twisted onto the filament surface, easily causing fiber scattering and loss, are urgent problems that need to be solved to effectively improve the yarn quality and increase the ultimate yarn fineness of embedded composite spinning technology.

[0004] In view of this, it is necessary to design a directional flow-guiding differential embedded composite spinning method, device and application to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a directional flow-guided differential embedded composite spinning method, apparatus, and application. This involves maintaining the normal operation of the mesh ring at the suction inlet of the compact spinning machine by slotting the front roller opening; furthermore, by changing the shape of the grooves in the irregularly shaped suction plate at the negative pressure suction inlet, the fibers on the mesh ring are forced to diverge and disperse, preventing the fibers from gathering after drafting; the yarn forming triangle zone is transferred from the front area of ​​the drive roller to the mesh ring without the restriction of the drive roller; the drafted fibers are wound with the filaments fed from the front roller opening, forming a twisted yarn through the yarn's rotation and the force between the short fiber fibers. By forming the twisting triangle zone in the support area on the mesh ring, the suspended state of the twisting triangle zone in conventional embedded spinning is eliminated, thereby enhancing the strength, hairiness, and evenness of the embedded spun yarn.

[0006] To achieve the above-mentioned objectives, the present invention provides a directional flow-guiding differential embedded composite spinning device, comprising a feeding unit, a differential embedded composite spinning unit, and a winding unit.

[0007] Preferably, the feeding unit includes a filament feeding unit and a staple fiber feeding unit. The filament feeding unit is equipped with a guide wheel, which carries the filament and can be moved to adjust the distance between the filament and the staple fiber sliver, so that the twisting position is maintained on the negative pressure suction plate. In the staple fiber feeding unit, the roving is fed in through the trumpet mouth, passes through the rear drafting zone and the front drafting zone, and is output from the front roller nip onto the differential embedded composite spinning unit.

[0008] Preferably, the differential embedded composite spinning unit consists of an auxiliary conveying component, a transmission gear, and a negative pressure adsorption conveying component; the auxiliary conveying component, together with the front roller, stretches the roving sliver that has passed through the rear drafting zone, and drives the mesh ring, so that the mesh ring conveys the short fiber sliver in the negative pressure suction support area; the negative pressure adsorption component supports and adsorbs the fibers conveyed by the auxiliary conveying component, maintaining the weight of the fibers and preventing loss, before entering the transmission rubber roller.

[0009] Preferably, the auxiliary conveying component consists of a front rubber roller, a bridge connecting component, and a drive rubber roller. The front rubber roller, in combination with the front roller, re-draws the roving sliver that has been drawn in the rear zone and conveys it to the support area. The bridge connecting component connects the front rubber roller and the drive rubber roller. The drive rubber roller, in combination with the drive roller, provides friction to the mesh ring to enable its transmission.

[0010] Preferably, the negative pressure adsorption conveying component includes a negative pressure suction plate; a suction cavity; a transmission roller; and a mesh ring. The drafted sliver passes through the front roller and reaches the negative pressure suction plate, where it is controlled by the negative pressure adsorption conveying component to stay on the mesh ring and not come apart, and is twisted with the filament to form a single strand of twisted yarn.

[0011] Preferably, the transmission roller has a circular groove embedded in its center, and the embedded yarn, after being spun on the support surface, passes through the groove to the winding unit and is wound into a tube.

[0012] Preferably, the negative pressure suction plate has several slots, with the number of slots ranging from 5 to 50.

[0013] Preferably, the winding unit includes a yarn guide hook, a wire traveler, a yarn guide, and a yarn tube.

[0014] A spinning method for directional flow-guided differential embedding composite spinning involves preparing embedded yarn using the aforementioned directional flow-guided differential embedding composite spinning device. The spinning method is as follows:

[0015] The short fiber sliver is fed in through the bell mouth and enters the rear drafting area. It is then delivered to the front drafting area via the middle roller and the middle rubber roller. It is then passed out from the front roller nip and conveyed into the negative pressure adsorption conveying component. The filament passes through the guide wheel and the front roller nip and is fed onto the negative pressure adsorption conveying component. The filament and the short fiber sliver are twisted together to form a yarn, which becomes a differential embedded composite yarn and is conveyed downward by the mesh ring via the drive rubber roller. The differential embedded composite yarn is conveyed by the mesh ring to the drive rubber roller and the lower part of the drive roller, and then enters the yarn winding unit to be wound on the yarn tube.

[0016] Preferably, the spinning method for the directional flow-guided differential embedding composite spinning is as follows:

[0017] Short fiber slivers are fed in through a trumpet-shaped inlet and enter the rear drafting zone under the action of the rear roller and rear slip roller. The short fiber slivers are pre-drafted and kept straight in the rear drafting zone before being delivered to the front drafting zone. They are then passed out from the front roller nip and enter the negative pressure adsorption conveying component. Long filaments are conveyed to the negative pressure adsorption conveying component after passing through the guide roller and the front roller nip. Differential embedded composite yarn is conveyed by the mesh ring to the drive roller and the lower part of the drive roller, and then enters the yarn winding unit and is wound onto the yarn tube.

[0018] On the negative pressure suction plate, the relative positions of the filaments and rovings are such that the filaments are located outside the rovings, or the filaments and rovings overlap in pairs, or the filaments and rovings are interspersed, or two rovings are fed into the same trumpet opening; in the case where the filaments and rovings are interspersed, the filaments are 1mm to 6mm away from the fiber rovings on the same side. On the negative pressure suction plate, the filaments and short fiber rovings are twisted together to become a micro-embedded composite yarn and are conveyed downward by the mesh ring through the transmission rubber roller;

[0019] The aforementioned directional flow-guided differential embedded composite spinning device is applied in the textile industry.

[0020] The synergistic effect of embedded spinning technology, negative pressure suction, and the circular ring embedded groove in this invention optimizes fiber stability and yarn quality during the spinning process. Embedded spinning technology achieves dynamic twisting of filaments and slivers in the yarn-forming zone in front of the front roller nip. However, this process is easily affected by changes in the air ring and spinning tension, leading to unstable twisting and fiber loss. The introduction of the negative pressure suction system effectively stabilizes the sliver fibers through the adsorption force generated by the suction plate, preventing them from being suspended in the twisting triangle zone and sucked away by the negative pressure, thereby reducing fiber scattering and loss and improving fiber utilization. Simultaneously, the circular ring embedded groove design provides a smooth channel for the yarn on the front roller, reducing friction and tension unevenness during winding, ensuring uniform winding and tension stability. The synergistic effect of these three elements significantly improves yarn quality, reduces yarn unevenness and defects, achieves finer ultimate yarn fineness, and effectively solves the technical problems existing in traditional embedded spinning processes.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention provides a spinning device for directional flow-guided differential embedded composite spinning, comprising a feeding unit, a differential embedded composite spinning unit, and a winding unit; the twisting position of the differential embedded composite spinning unit is located on a suction plate; by supporting the short fiber slivers through the suction plate, the phenomenon of short fibers escaping and scattering is avoided, reducing the performance loss in yarn strength, hairiness, evenness, etc. caused by the loss of short fibers, maximizing the utilization of short fibers, effectively reducing costs, and maintaining a good environment in the spinning workshop; through the coordinated cooperation of each unit, it can be applied in industry, realizing high-speed industrial spinning, and the prepared differential embedded composite yarn has good comprehensive performance and a wide range of market applications.

[0023] 2. In the differential embedded composite spinning unit of the present invention, the suction cavity is hollow and equipped with negative pressure suction. A suction plate is installed at the groove on the surface of the suction cavity. Several grid holes are evenly distributed on the suction plate. The negative pressure suction passes through the grid holes to adsorb the short fiber slivers onto the surface of the suction plate to support and transport the short fiber slivers, thereby preventing the short fibers from falling off and reducing the performance loss in yarn strength, hairiness, evenness, etc. caused by machine factors, thus enhancing the overall performance of the yarn.

[0024] 3. In the auxiliary conveying component of the present invention, the projection of the front roller is maintained on the grid ring, and a groove is opened around the middle. During the spinning process, the pressure and friction of the front roller and the drive roller on the grid ring causes the grid ring to roll, thereby driving the short fiber sliver and filament to move. The groove allows the differential embedded composite yarn to be free from the clamping of the front roller and the drive roller. The twist applied to the yarn by the machine can be transmitted upward to the filament and short fiber on the surface of the suction plate, avoiding the inevitable loss of short fibers due to suspension during the yarn forming process.

[0025] 4. The circular groove embedded in the middle of the front roller in this invention optimizes the yarn winding process. By providing a smooth channel, it reduces friction and uneven tension of the yarn during the transfer from the front roller to the winding unit. Moreover, by dynamically optimizing the yarn formation method and path, it effectively promotes the flattening of fine hairs and reduces yarn instability caused by factors such as roller quality, spinning speed, and static electricity. This improves the stability and quality of the yarn, enhances the spinning efficiency of the entire spinning device, and strengthens the market competitiveness of the yarn products.

[0026] 5. The directional flow-guiding differential embedded composite spinning yarn device of the present invention only requires modification of the negative pressure suction plate and the front roller on a conventional compact spinning machine to achieve the goal of keeping the width of the short fiber slivers from converging; and the guide wheel can be adjusted to adjust the position of the filament feed, thereby achieving the effect of differential embedded composite spinning to improve yarn quality; the device has low modification cost, wide application range, and good industrial application value. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the spinning device structure for the directional flow-guiding differential embedded composite spinning of the present invention.

[0028] Figure 2 for Figure 1 Enlarged view of a partial structure of the directional flow-guided differential embedded composite spinning unit.

[0029] Figure 3 for Figure 1 A schematic diagram of the specific structure of the center-directed flow-guiding differential embedded composite spinning unit.

[0030] Figure 4 A schematic diagram of centered feeding of single roving.

[0031] Figure 5 A schematic diagram showing the feeding of filaments and rovings overlapping.

[0032] Figure 6 A schematic diagram showing the alternating feeding of filaments and rovings.

[0033] Figure 7 This represents the short fiber delamination situation after 20 minutes in a traditional unsupported state.

[0034] Figure Labels

[0035] S1: Roving A; S2: Roving B; S11: Short fiber sliver 1 formed after drafting roving A; S21: Short fiber sliver 2 formed after drafting roving B; F1: Filament A; F2: Filament B; 10: Feed unit; 11: Trumpet; 12: Back roller; 13: Back guide roller; 14: Middle roller; 15: Middle guide roller; 16: Guide roller; 17: Front roller; 20: Micro-embedded composite spinning Unit; 21: Auxiliary conveying component; 21-1: Front rubber roller; 21-2: Bridge connecting component; 21-3: Drive rubber roller; 22: Drive gear; 23: Negative pressure adsorption conveying component; 23-1: Negative pressure suction plate; 23-2: Suction cavity; 23-3: Drive roller; 23-4: Mesh ring; 30: Winding unit; 31: Yarn guide hook; 32: Steel wire ring; 33: Tube; 34: Yarn tube. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0038] Additionally, it should be noted that 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.

[0039] Example 1: Feeding of a single roving with a centrally centered double-core yarn:

[0040] Please see Figure 1 The diagram shows a schematic of a spinning device for directional flow-guided differential embedded composite spinning, including a feeding unit 10, a differential embedded composite spinning unit 20, and a winding unit 30. In the feeding unit 10, roving AS1 is fed in through a bell mouth 11, passes through the rear drafting zone and the front drafting zone, and is output from the front roller 17 as short fiber sliver AS11. The short fiber sliver AS11 is attached to the mesh ring 23-4 under the action of negative pressure suction, and then twists and merges with the fed filament AF1 and filament BF2. It is then transported by the mesh ring 23-4 to the yarn winding unit 30. The yarn winding unit finally winds the yarn onto the yarn tube 34 via the yarn guide hook 31, the wire traveler 32, and the bobbin 33.

[0041] This directional flow-guided differential embedded composite spinning device, through the suction plate 23-1 supporting the short fiber sliver AS11, avoids the escape and scattering of short fibers, reduces the performance loss in yarn strength, hairiness, and evenness caused by short fiber loss, maximizes the utilization of short fibers, effectively reduces costs, and maintains a good environment in the spinning workshop. Through the coordinated operation of each unit, it can be applied in industry, realizing high-speed industrial spinning, and the prepared differential embedded composite yarn has good comprehensive performance and a wide range of market applications.

[0042] Please see Figure 2 , Figure 3 The auxiliary conveying component 21 includes a front roller 21-1, a bridging connection component 21-2, and a drive roller 21-3. The front roller 21-1 is in contact with the front roller 17 to draft the short fiber sliver AS11 entering the front drafting zone. The bridging connection component 21-2 is used to connect the front roller 21-1 and the drive roller 21-3. The drive roller 21-3 has a groove around its center. The interaction between the drive roller 21-3 and the drive roller 23-3 provides friction to the mesh ring 23-4, enabling its transmission. The negative pressure adsorption conveying component 23 includes a negative pressure suction plate 23-1, a suction cavity 23-2, a drive roller 23-3, and a mesh ring 23-4. The drafted short fiber sliver AS11 is conveyed onto the suction plate 23-1. The negative pressure suction inside the suction cavity 23-2 acts on the short fiber sliver AS11 through the suction slots on the suction plate 23-1. S11, the filaments attached to the mesh ring 23-4 and guided by the guide wheel 16 are twisted with the short fiber slivers AS11 in the negative pressure suction plate 23-1 to become a micro-embedded composite yarn; the present invention uses the suction plate to increase the holding force of the negative pressure suction cavity on the short fibers, reduce the loss of short fibers, reduce the fuzz on the yarn surface, reduce the waste of short fibers, reduce the cost of handling scattered short fibers, and at the same time increase the quality of yarn.

[0043] Please see Figure 4 After being stretched, the short fiber sliver AS11 is fed onto the mesh ring 23-4 via the front roller 17. The negative pressure inside the negative pressure suction chamber 23-2 tightly adheres the short fiber sliver AS11 to the mesh ring 23-4 and transports it to the drive roller 23-3. At the same time, the filaments AF1 and BF2 are fed onto the mesh ring 23-4 via the front nip via the front roller 17. The short fiber sliver AS11 wraps around the filament BF2, and the filament AF1 wraps around the short fiber sliver AS11 and the filament BF2 from the outside, forming a differential embedded composite yarn, which is output from the drive roller 23-4.

[0044] The filament material of the embedded yarn is 84D*2 black nylon yarn; the roving A material is 608tex white cotton roving.

[0045] Process parameters: spindle speed is 7200 r / min; twist is 57.7 T / 10 cm; front roller linear speed is 10.29 m / min; total draw ratio is 34.74; bast cotton fiber linear density is 17.5 tex.

[0046] The innovation of this embodiment 1 lies in its unique yarn structure and synergistic effect. Short fiber sliver AS11 is located at the core of the yarn, while filaments BF2 and AF1 are continuously and alternately wrapped around its exterior, forming a composite wrapping structure. This structure, combined with the efficient adsorption of the negative pressure suction system, provides stable support for the short fiber sliver, ensuring it is precisely fixed to the suction plate during spinning, effectively reducing fiber escape and scattering. Furthermore, the alternating wrapping of the filaments not only enhances the structural stability of the yarn but also, through the pressure and friction generated by the wrapping, moderately counteracts the over-adhesion that might occur with the suction system, further stabilizing the fiber arrangement and making the yarn structure more compact and uniform. Moreover, the circular groove embedded in the center of the front roller plays a crucial role in this process, providing a smooth channel for the newly formed yarn, allowing it to smoothly transition from the support surface to the winding unit without additional friction and pressure. This design reduces potential yarn breakage or frizz during transmission, ensuring yarn uniformity and quality. Meanwhile, the presence of the grooves also helps maintain uniform yarn tension, avoiding yarn quality problems caused by uneven tension. Therefore, the synergistic effect of the grooves embedded in the ring and the negative pressure suction system not only improves the efficiency of the spinning process but also significantly enhances the overall quality of the yarn product, strengthens the yarn's spinnability and subsequent processing performance, thus giving the yarn of this invention a broader application prospect and higher economic value in the market.

[0047] Comparative Example 1: Single roving centered double core yarn feeding:

[0048] Comparative Example 1 provides an embedding spinning apparatus and method. The apparatus is a conventional embedding spinning apparatus, and the method involves suspending the twisting zone of the filament and staple fiber to obtain an embedding spun yarn. The embedding yarn material, feeding position, and process parameters used are the same as those in Example 1. The yarn spun in Comparative Example 1 has inferior strength, hairiness, and evenness compared to the yarn spun in Example 1.

[0049] Example 2: Double core yarn and double short fiber are fed in a superimposed manner:

[0050] This embodiment provides a directional flow-guided differential embedded composite spinning device and method. Compared with Embodiment 1, the difference is that the core yarn and short fiber are fed in an overlapping feeding manner in this embodiment.

[0051] Please see Figure 1As shown, a spinning device and method for directional flow-guided differential embedded composite spinning includes a feeding unit 10, a differential embedded composite spinning unit 20, and a winding unit 30. In the feeding unit 10, rovings AS1 and BS2 are fed in through a double-track feeding port 11, and output from the front roller 17 via the rear drafting zone and the front drafting zone to form short fiber slivers AS11 and BS21. Short fiber slivers AS11 and BS21 are adsorbed onto the mesh ring 23-4 by negative pressure suction. Simultaneously, filaments AF1 and BF2 are conveyed to the mesh ring 23-4 via the front nip and front roller 17. Filament AF1 is positioned at the center of short fiber sliver AS11 and is core-wrapped, while filament BF2 is positioned at the center of short fiber sliver BF2. S21 is centered and cored; the two cored yarns formed are combined into a differential embedded composite yarn, which is transported to the yarn winding unit 30 by the mesh ring 23-4; the yarn winding unit is finally wound onto the yarn tube 34 via the yarn guide hook 31, the wire ring 32, and the cable 33.

[0052] Please see Figure 2 , Figure 3 The auxiliary conveying component 21 includes a front roller 21-1, a bridging connection component 21-2, and a drive roller 21-3. The front roller 21-1 is in contact with the front roller 17 to draft the short fiber slivers AS11 and B21 entering the front drafting zone. The bridging connection component 21-2 is used to connect the front roller 21-1 and the drive roller 21-3. The drive roller 21-3 has a groove around its center. The drive roller 21-3 interacts with the drive roller 23-3 to provide friction to the mesh ring 23-4, enabling it to move. The negative pressure adsorption conveying component 23 includes a negative pressure suction plate 23-1, a suction cavity 23-2, a drive roller 23-3, and a mesh ring 23-4. The drafted short fiber slivers AS11 and B21 are conveyed through the mesh ring 23-4. S21 is conveyed to the suction plate 23-1. The negative pressure suction inside the suction chamber 23-2 acts on the short fiber slivers AS11 and BS21 through the suction slots on the suction plate 23-1, causing the filament F1, which is attached to the mesh ring 23-4 and guided by the guide wheel 16, to overlap and core-wrap with the short fiber sliver AS11 on the negative pressure suction plate 23-1, and the filament F2 to overlap and core-wrap with the short fiber sliver BS21 on the negative pressure suction plate 23-1. Finally, the two core-wrap yarns are twisted together to form a micro-embedded composite yarn. This invention uses the suction plate to increase the holding force of the negative pressure suction chamber on the short fibers, reduce the loss of short fibers, reduce the fuzz on the yarn surface, reduce the waste of short fibers, reduce the cost of handling scattered short fibers, and also increase the quality of the yarn.

[0053] Please see Figure 5After being drafted, short fiber slivers AS11 and BS21 are conveyed to the mesh ring 23-4 via the front roller 17. The negative pressure inside the negative pressure suction chamber 23-2 tightly adheres the short fiber slivers AS11 and BS21 to the mesh ring 23-4 and transports them to the drive roller 23-3. At the same time, filaments AF1 and BF2 are conveyed to the mesh ring 23-4 via the front nip by the front roller 17. Filament AF1 is positioned at the center of short fiber sliver AS11 and is core-wrapped, while filament BF2 is positioned at the center of short fiber sliver BS21 and is core-wrapped. The two core-wrapped yarns are then twisted together to form a differential embedded composite yarn and output from the drive roller 23-4.

[0054] The filament material of the embedded yarn is 84D*2 black nylon yarn; the material of roving A and roving B is 304tex white cotton roving.

[0055] Process parameters: spindle speed is 7200 r / min; twist is 57.7 T / 10 cm; front roller linear speed is 10.29 m / min; total draw ratio is 34.74; bast cotton fiber linear density is 17.5 tex.

[0056] The preparation process of this scheme is as follows: filament AF1 and filament BF2 are fed to the mesh ring 23-4 by the front roller 17 through the front nip. Filament AF1 is located in the center of short fiber sliver AS11 and is core-wrapped, while filament BF2 is located in the center of short fiber sliver BS21 and is core-wrapped. The two core-wrapped yarns are then twisted together to form a double-core twisted structure yarn, which can effectively reduce hairiness and enhance yarn evenness.

[0057] The innovation of Example 2 lies in the adoption of a micro-embedded composite spinning technology with a double-core twisted structure. Through a specially designed feeding method, filaments AF1 and BF2 are placed at the center of short fiber slivers AS11 and BS21 respectively for core-sleeving. The two yarns are then twisted together to form a micro-embedded composite yarn with excellent mechanical properties and surface quality. This structure not only significantly improves internal strength and stability but also enhances yarn evenness by reducing surface hairiness. The application of a negative pressure suction system, through precise control of the suction plate, provides stable support for the short fiber slivers, ensuring orderly arrangement and tight bonding of fibers during spinning, reducing fiber escape and scattering. Furthermore, the circular groove embedded in the front roller provides a smooth channel for the yarn, optimizing the yarn transfer process from the drafting zone to the winding unit, reducing friction and tension unevenness, and further improving yarn quality. The combined application of these innovations enables the yarn of Example 2 to maintain high strength while also possessing good softness and processability, making it suitable for a wider range of textile applications.

[0058] Comparative Example 2: Dual-core yarn and dual short fibers are fed in a superimposed manner.

[0059] Comparative Example 2 provides an embedding spinning apparatus and method. The apparatus is a conventional embedding spinning apparatus, and the method involves suspending the twisting zone of the filament and staple fiber to obtain an embedding spun yarn. The embedding yarn material, feeding position, and process parameters used are the same as in Example 2. The yarn spun in this comparative example has inferior strength, hairiness, and evenness compared to the yarn spun in Example 2.

[0060] Example 3: Alternating feeding of dual-core yarn and dual short fibers:

[0061] This embodiment provides a directional flow-guided differential embedded composite spinning device and method. Compared with embodiments 1 and 2, the difference is that the core yarn and short fiber are fed in an intermittent feeding manner in this embodiment.

[0062] Please see Figure 1 As shown, a spinning device and method for directional flow-guided differential embedded composite spinning includes a feeding unit 10, a differential embedded composite spinning unit 20, and a winding unit 30. In the feeding unit 10, rovings AS1 and BS2 are fed in through a double-track feeding port 11, and output from the front roller 17 via the rear drafting zone and the front drafting zone to form short fiber slivers AS11 and BS21. The short fiber slivers AS11 and BS21 are adsorbed onto the mesh ring 23-4 by negative pressure suction. Simultaneously, filaments AF1 and BF2 are conveyed to the mesh ring 23-4 by the front roller 17 through the front nip. Filament AF1 is positioned to the right of short fiber sliver AS11 and intertwined with it, while filament BF2 is positioned to the right of short fiber sliver BF2. S21 is wound around the right side and the core is wound; the two yarns formed are combined into a differential embedded composite yarn, which is transported to the yarn winding unit 30 by the mesh ring 23-4; the yarn winding unit is finally wound onto the yarn tube 34 via the yarn guide hook 31, the wire ring 32, and the cable 33.

[0063] Please see Figure 2 , Figure 3The auxiliary conveying component 21 includes a front roller 21-1, a bridging connection component 21-2, and a drive roller 21-3. The front roller 21-1 is in contact with the front roller 17 to draft the short fiber slivers AS11 and B21 entering the front drafting zone. The bridging connection component 21-2 is used to connect the front roller 21-1 and the drive roller 21-3. The drive roller 21-3 has a groove around its center. The drive roller 21-3 interacts with the drive roller 23-3 to provide friction to the mesh ring 23-4, enabling it to move. The negative pressure adsorption conveying component 23 includes a negative pressure suction plate 23-1, a suction cavity 23-2, a drive roller 23-3, and a mesh ring 23-4. The drafted short fiber slivers AS11 and B21 are conveyed through the mesh ring 23-4. S21 is conveyed to the suction plate 23-1. The negative pressure suction inside the suction chamber 23-2 acts on the short fiber slivers AS11 and BS21 through the suction slots on the suction plate 23-1, causing the long filament F1, which is attached to the mesh ring 23-4 and guided by the guide wheel 16, to be twisted on the right side of the short fiber sliver AS11 and the negative pressure suction plate 23-1. The long filament F2 is wound and core-wrapped on the right side of the short fiber sliver BS21 and the negative pressure suction plate 23-1. Finally, the two yarns are twisted to become a differential embedded composite yarn. This invention uses the suction plate to increase the holding force of the negative pressure suction chamber on the short fibers, reduce the loss of short fibers, reduce the fuzz on the yarn surface, reduce the waste of short fibers, reduce the cost of handling scattered short fibers, and also increase the quality of yarn.

[0064] Please see Figure 5 After being drafted, short fiber slivers AS11 and BS21 are conveyed to the mesh ring 23-4 via the front roller 17. The negative pressure inside the negative pressure suction chamber 23-2 tightly adheres the short fiber slivers AS11 and BS21 to the mesh ring 23-4 and transports them to the drive roller 23-3. At the same time, filaments AF1 and BF2 are conveyed to the mesh ring 23-4 via the front nip by the front roller 17. Filament AF1 is positioned to the right of short fiber sliver AS11 and is twisted together, while filament BF2 is positioned to the right of short fiber sliver BS21 and is wound into a core. The two yarns are then twisted together to form a differential embedded composite yarn and output from the drive roller 23-4.

[0065] The filament material of the embedded yarn is 84D*2 black nylon yarn; the material of roving A and roving B is 304tex white cotton roving.

[0066] Process parameters: spindle speed is 7200 r / min; twist is 57.7 T / 10 cm; front roller linear speed is 10.29 m / min; total draw ratio is 34.74; bast cotton fiber linear density is 17.5 tex.

[0067] The preparation process of this scheme is as follows: filament AF1 and filament BF2 are fed to the mesh ring 23-4 by the front roller 17 through the front nip. Filament AF1 is located at the center of short fiber sliver AS11 and is twisted with each other. Filament BF2 is located at the center of short fiber sliver BS21 and is twisted with each other. The two twisted yarns are then twisted together to form a Cello core-spun twisted structure, which can effectively improve the yarn strength.

[0068] The innovation of Example 3 lies in the use of an intermittent feeding method, which effectively arranges and twists filaments A F1 and B F2 with short fiber slivers AS11 and BS21 to form a micro-embedded composite yarn with a special structure. In this process, filaments A F1 and AS11 are adjacent and intertwined, while filament B F2 is wound around AS21. This design not only enhances the internal bonding force of the yarn but also improves its mechanical properties and surface quality through the orderly arrangement of filaments and short fibers. The negative pressure suction system, through precise control of the suction plate, ensures stable adsorption and orderly arrangement of fibers during spinning, reducing the loss of short fibers and fuzz on the yarn surface, thereby improving the quality of the finished yarn. Furthermore, the circular groove embedded in the front roller provides a smooth transition path for the yarn, optimizing the transfer process from the drafting zone to the winding unit, reducing friction and uneven tension, and further improving the quality of the yarn. The synergistic effect of these three factors not only improves spinning efficiency but also significantly enhances the overall performance of the yarn, giving it better market competitiveness and a wider range of applications.

[0069] Comparative Example 3: Two-core yarns and two short fibers are fed alternately.

[0070] Comparative Example 3 provides an embedding spinning apparatus and method. The apparatus is a conventional embedding spinning apparatus, and the method involves suspending the twisting zone of the filament and staple fiber to obtain an embedding spun yarn. The embedding yarn material, feeding position, and process parameters used are the same as in Example 3. The yarn spun in this comparative example has inferior strength, hairiness, and evenness compared to the yarn spun in Example 3.

[0071] Comparative Example 4: Two-core yarns and two short fibers are fed alternately.

[0072] Comparative Example 4 provides an embedded spinning device and method, which is basically the same as that of Example 3, except that the drive roller 21-3 does not have a groove around its center, thus obtaining embedded spun yarn. The embedded spinning yarn material, feeding position, and process parameters are the same as those of Example 3. The yarn spun in this comparative example has inferior strength, hairiness, and evenness compared to the yarn spun in Example 3.

[0073] Comparative Example 5: Two-core yarns and two short fibers are fed alternately.

[0074] Comparative Example 5 provides an embedded spinning device and method, which is basically the same as that of Example 3, except that the negative pressure suction inside the suction chamber 23-2 is shut off to obtain embedded spun yarn; the embedded spinning yarn material, feeding position, and process parameters are the same as those of Example 3. The yarn spun in this comparative example has inferior strength, hairiness, and evenness compared to the yarn spun in Example 3.

[0075] The mechanical properties, hairiness, and evenness of the embedded yarns prepared in Examples 1 to 3 and Comparative Examples 1 to 5 were compared, and the results are shown in the table below.

[0076] Table 1 Comparison of yarn mechanical properties

[0077]

[0078]

[0079] Table 2 Comparison Results of Yarn Hairiness Index

[0080] Hairiness 1mm 2mm 3mm and above Example 1 1310.78 217.00 71.89 Comparative Example 1 1547.45 245.77 90.45 Example 2 1288.44 361.89 122.33 Comparative Example 2 1346.57 373.32 146.89 Example 3 1405.00 303.33 125.67 Comparative Example 3 1638.54 337.97 148.08 Comparative Example 4 1507.31 313.41 146.73 Comparative Example 5 1568.53 324.80 145.66

[0081] Table 3 Comparison of Yarn Dryness Index Results

[0082]

[0083]

[0084] As shown in Table 1, the yarns of Examples 1 to 3 generally outperform the yarns of Comparative Examples 1 to 5 in terms of strength indicators such as maximum tensile force, elastic modulus, and elongation at break. This indicates that the differential embedded composite spinning technology of the present invention effectively improves the mechanical properties of the yarn by optimizing the yarn structure and spinning process. Specifically, the yarns in the examples have higher mechanical properties, which means that the yarns have a stronger ability to withstand maximum tensile force and elongation at break, making the yarns more elastic and durable during use. These improved strength indicators make the yarns of the present invention more suitable for applications requiring high strength and high stability, and also demonstrate the significant advantages of the present invention in improving yarn quality.

[0085] As shown in Table 2, the yarns of Examples 1 to 3 performed better in terms of hairiness index, specifically, the number of hairs larger than 1mm, 2mm, and 3mm was lower than that of the corresponding comparative examples 1 to 5. Hairiness is an important factor affecting the appearance and quality of yarn. Excessive hairiness can lead to entanglement and breakage of the yarn in subsequent processing, affecting the surface smoothness and hand feel of the fabric. This invention significantly reduces the hairiness generated by short fiber slivers and filaments during the spinning process by employing differential embedded composite spinning technology. This is due to the synergistic effect of the negative pressure suction system and the embedded grooves in the circular ring, which together ensure stable control of the fibers during the spinning process and reduce fiber escape and scattering. In addition, the orderly arrangement and tight wrapping of filaments and short fibers also help to further reduce hairiness generation.

[0086] As shown in Table 3, the yarn evenness of Examples 1 to 3 is generally superior to that of the corresponding comparative examples 1 to 5. Yarn evenness is an important indicator of yarn quality, reflecting the uniformity of yarn thickness along its length. A lower coefficient of variation means the yarn is more uniform overall, without significant thickness fluctuations, which helps improve the smoothness of subsequent weaving processes and the quality of the final product. The yarn evenness values ​​of -50%, +50%, 200%, and 400% in the examples are low, indicating better uniformity control at each thickness level. This improved evenness performance is attributed to the special spinning device and method used in this invention, particularly the application of the negative pressure suction system and the grooved ring, which ensures the uniform distribution and orderly arrangement of fibers during the spinning process. Furthermore, the alternating wrapping of filaments and staple fibers also helps to further improve the yarn evenness.

[0087] In summary, this invention provides a spinning device for directional flow-guided differential embedded composite spinning, comprising a feeding unit, a differential embedded composite spinning unit, and a winding unit. It achieves optimized combination and twisting of short fiber slivers and filaments, significantly improving the mechanical properties of the yarn, reducing hairiness, and enhancing yarn evenness. This invention utilizes a negative pressure suction system to effectively support the short fiber slivers, preventing fiber escape and scattering. Simultaneously, the circular groove design on the front roller optimizes the yarn forming and transfer path, reducing uneven tension and friction during winding, thereby lowering yarn instability. Furthermore, the spinning device of this invention can adapt to different spinning process parameters. By adjusting the feeding method and position of filaments and short fibers, diverse yarn structures, such as core-spun structures, wrapped structures, and ply structures, can be achieved to meet the needs of different application scenarios. This innovative spinning technology not only improves the overall quality of the yarn but also enhances its market competitiveness, possessing broad industrial application prospects and economic benefits.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A spinning device for directional flow-guiding differential embedded composite spinning, characterized in that, It includes a feeding unit (10), a differential embedded composite spinning unit (20), and a winding unit (30). The feeding unit (10) includes a filament feeding unit and a staple fiber feeding unit. The filament feeding unit is provided with a guide wheel (16). The guide wheel (16) carries the filament and can move to adjust the distance between the filament and the staple fiber sliver, so that the twisting position is maintained on the negative pressure suction plate (23-1). In the staple fiber feeding unit, the roving is fed in through the trumpet mouth (11), passes through the rear drafting zone and the front drafting zone, and is output from the front roller (17) nip onto the differential embedded composite spinning unit (20). The differential embedded composite spinning unit (20) consists of an auxiliary conveying component (21), a transmission gear (22), and a negative pressure adsorption conveying component (23). The auxiliary conveying component (21) clamps the roving sliver that has passed through the rear drafting zone with the front roller (17) to draft it, and drives the mesh ring (23-4) to convey the short fiber sliver in the negative pressure suction support area. The negative pressure adsorption conveying component (23) supports and adsorbs the fiber conveyed by the auxiliary conveying component (21) to maintain the weight of the fiber and then enters the transmission rubber roller (21-3). The auxiliary conveying component (21) consists of a front rubber roller (21-1), a bridge connecting component (21-2), and a drive rubber roller (21-3). The front rubber roller (21-1) is combined with the front roller (17) to re-draw the roving sliver that has been drawn in the rear zone and convey it to the support area. The bridge connecting component (21-2) connects the front rubber roller (21-1) and the drive rubber roller (21-3). The drive rubber roller (21-3) is combined with the drive roller (23-3) to provide friction to the mesh ring (23-4) so ​​that it can drive. The negative pressure adsorption conveying component (23) includes a negative pressure suction plate (23-1); a suction cavity (23-2); a transmission roller (23-3); and a mesh ring (23-4). The drafted sliver passes through the front roller and reaches the negative pressure suction plate (23-1), where it is controlled by the negative pressure adsorption conveying component (23) to remain on the mesh ring (23-4) and not come loose, and is twisted with the filament to become a single strand of twisted yarn. The negative pressure suction plate (23-1) has several slots, with the number of slots ranging from 5 to 50. The transmission roller (21-3) has a circular groove embedded in the middle. After the yarn is spun on the support surface, it passes through the groove to the winding unit (30) and is wound into a tube. On the negative pressure suction plate (23-1), the relative positions of the filaments and rovings are such that the filaments and rovings overlap in pairs or are interspersed; in the case of the filaments and rovings being interspersed, the filaments are 1mm to 6mm away from the fiber rovings on the same side. On the negative pressure suction plate (23-1), the filaments and short fiber rovings are twisted together to become a differential embedded composite yarn and are conveyed downward by the mesh ring (23-4) through the transmission rubber roller (21-3).

2. The spinning device for directional flow-guiding differential embedded composite spinning as described in claim 1, characterized in that, The winding unit (30) includes a yarn guide hook (31), a wire loop (32), a bobbin (33), and a yarn tube (34).

3. A spinning method for directional flow-guided differential embedding composite spinning, characterized in that, Embedded spinning is prepared using the spinning device for directional flow-guiding differential embedded composite spinning according to any one of claims 1 to 2. The spinning method is as follows: The short fiber sliver is fed in through the bell mouth (11), enters the rear drafting area, and is delivered to the front drafting area through the middle roller (14) and the middle leather roller (15). It is then passed out from the nip of the front roller (17) and conveyed into the negative pressure adsorption conveying component (23). The filament passes through the guide wheel (16) and the nip of the front roller (17) and is sent to the negative pressure adsorption conveying component (23). The filament and the short fiber sliver are twisted together to form a yarn, which becomes a differential embedded composite yarn and is conveyed downward by the mesh ring (23-4) through the drive rubber roller (21-3). The differential embedded composite yarn is conveyed by the mesh ring (23-4) to the lower part of the drive rubber roller (21-3) and the drive roller (23-3), and enters the yarn winding unit (30) to be wound on the yarn tube (34).

4. The spinning method for directional flow-guided differential embedding composite spinning as described in claim 3, characterized in that, The spinning method is as follows: Short fiber slivers are fed in through the bell mouth (11) and enter the rear drafting area under the action of the rear roller (12) and the rear skin roller (13). The short fiber slivers are pre-stretched and kept straight in the rear drafting area and then delivered to the front drafting area. They are then passed out from the nip of the front roller (17) and enter the negative pressure adsorption conveying component (23). The filaments are conveyed through the guide wheel (16) and the nip of the front roller (17) to enter the negative pressure adsorption conveying component (23). The differential embedded composite yarn is conveyed by the mesh ring (23-4) to the lower part of the drive roller (21-3) and the drive roller (23-3) and enters the yarn winding unit (30) to be wound on the yarn tube (34).

5. The application of the spinning device for directional flow-guiding differential embedding composite spinning as described in any one of claims 1 to 2, characterized in that, It is used in the textile industry.

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