Directional drainage type differential embedding composite spinning device and method and application

Abstract

The invention provides a directional drainage type differential embedding composite spinning method and device and application, and aims to solve the problems of escape and scattering of short fibers in traditional embedding spinning and improve the comprehensive performance of yarns. The spinning device comprises a feeding unit, a differential embedding composite spinning unit and a winding unit. The feeding unit is composed of a filament feeding unit and a short fiber feeding unit. The differential embedded composite spinning unit is composed of an auxiliary conveying component, a transmission gear and a negative pressure adsorption conveying component, and a negative pressure air suction system is used for effectively supporting short fiber strands to ensure that the short fiber strands and filaments are stably twisted on an air suction plate. The winding unit is responsible for winding the differential embedded composite yarn into a tube. Compared with the prior art, the spinning method has the advantages that high-speed industrial production of the yarn is achieved by accurately controlling feeding and adsorption of the fibers, meanwhile, the strength, hairiness and evenness performance of the yarn are guaranteed, the production cost is reduced, and the spinning method is suitable for wide market application.

Description

Technical Field

[0001] The invention relates to the technical field of textile processing, and in particular to a directional drainage type differential embedding composite spinning method, a device and an application thereof. Background Art

[0002] Embedded spinning is a new type of ring spinning technology. The specific spinning method is: feed double roving whiskers into the bell mouth of the ring spinning machine, and feed double filaments into the front roller; the position is that the roving whiskers are arranged in parallel, and the filaments are scattered on both sides. Due to the twisting effect of the spinning frame, the yarn twist is transferred from the main thread to the two filaments. At the outlet of the front roller of the ring spinning machine, the left-end whiskers are twisted and combined with the left-end filaments, and the right-end filaments are twisted and combined with the right-end filaments. Finally, the two twisted yarns are twisted and merged into one yarn and wound onto the bobbin. The principle of this technology is to increase the twisting process of filaments and short fiber whiskers on the basis of traditional ring spinning technology, so as to achieve a relatively loose effect on the restrictions on the short fiber content and the shortest fiber length in the fiber whiskers, thereby providing a new way to use short fiber raw materials. The application of embedded spinning technology can not only use low-grade raw materials to spin fine yarns, but also make appropriate adjustments based on its principles to develop new yarns, such as ultra-fine yarns, multi-component yarns, fancy yarns, wrapped yarns, core-spun yarns, etc. Compared with traditional ring spinning, embedded spinning technology can also reduce yarn hairiness and improve yarn uniformity. During the embedded spinning process, the spacing and tension between the filaments and whiskers have an important influence on the structure and performance of the yarn. At the same time, the fiber's length, fineness, strength and other characteristics will also affect the effect of embedded spinning.

[0003] However, the conventional embedded spinning yarn forming area is located in front of the front roller jaws, and two filaments and two whiskers are suspended in the air and twisted into yarn dynamically. In this case, due to the changes in the size of the ring spinning machine's air circle and the spinning tension, the components in the yarn forming area are dynamically vibrating and turbulent, making the twisting between the whisker fibers and the filaments unstable, and the whisker fibers are easily sucked away by the negative pressure flute mouth and lost, resulting in a decrease in the fiber utilization rate of the yarn, a worsening of the unevenness of the yarn, and an increase in yarn defects. How to prevent the whisker fibers from being entangled in the twisting triangle area of ​​the filaments and being suspended or exposed in the air, and the fibers on the whisker have no support when twisted onto the surface of the filaments, which easily causes the fibers to scatter and be lost, is an urgent problem to be solved in order to effectively improve the yarn quality of embedded composite spinning technology and increase the limit of yarn fineness.

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

[0005] The purpose of the present invention is to provide a directional drainage differential embedded composite spinning method, device and application, by slotting the front roller mouth of the concentrated spinning machine to maintain the normal operation of the grid circle at the concentrated spinning suction port; then by changing the shape of the slot hole of the special-shaped suction plate at the negative pressure suction port, the whisker fibers on the grid circle are forced to be differentiated and dispersed, avoiding the whisker to be gathered after drawing; the yarn forming triangle area is transferred from the front area of ​​the transmission roller to the grid circle without the restriction of the transmission roller; the whisker after drawing is wound with the filament fed from the front roller mouth, and the twisted yarn is formed by the self-rotation of the yarn and the force between the short fiber whiskers. By forming the twisting triangle area in the supporting area on the grid circle, the suspension of the conventional embedded spinning twisting triangle area is eliminated, thereby enhancing the strength, hairiness, and yarn dryness of the embedded spinning line.

[0006] To achieve the above-mentioned purpose of the invention, the present invention provides a directional drainage type differential embedded composite spinning device, including a feeding unit, a differential embedded composite spinning unit and a winding unit.

[0007] Preferably, the feeding unit comprises a filament feeding unit and a staple fiber feeding unit, the filament feeding unit is provided with a guide wheel, the guide wheel carries the filament and can be moved to adjust the distance between the filament and the staple fiber strands so that the twisting position is maintained on the negative pressure suction plate; in the staple fiber feeding unit, the coarse yarn is fed from the bell mouth, passed through the rear stretching zone and the front stretching zone, and output from the front roller jaws to the differential embedded composite spinning unit.

[0008] Preferably, the differential embedded composite spinning unit is composed of an auxiliary conveying component, a transmission gear and a negative pressure adsorption conveying component; the auxiliary conveying component and the front roller clamping stretch the coarse yarn strands that have passed through the rear zone stretching, and drive the grid circle to transport the short fiber strands in the negative pressure suction supporting area; the negative pressure adsorption component supports and adsorbs the fibers transported by the auxiliary conveying component to maintain the weight of the fibers from being lost before entering the transmission rubber roller.

[0009] Preferably, the auxiliary conveying component is composed of a front rubber roller, a bridge connecting component and a transmission rubber roller. The front rubber roller is combined with the front roller to re-stretch the coarse yarn strands that have been stretched in the rear area, and convey them to the supporting area; the bridge connecting component connects the front rubber roller and the transmission rubber roller; the transmission rubber roller is combined with the transmission roller to give friction to the grid ring to enable it to transmit.

[0010] Preferably, the negative pressure adsorption conveying component includes a negative pressure suction plate; a suction cavity; a transmission roller; a grid ring; the stretched yarn passes through the front roller and reaches the negative pressure suction plate, is controlled by the negative pressure adsorption conveying component on the grid ring without falling apart, and is twisted with the filament to form a single-strand twisted yarn.

[0011] Preferably, a circular embedded groove is opened around the middle of the transmission rubber roller, and the embedded spinning thread is formed into yarn on the supporting surface through the groove to reach the winding unit and be wound into a tube.

[0012] Preferably, the negative pressure suction plate has a plurality of slots, and the number of the slots is between 5 and 50.

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

[0014] A spinning method for directional drainage type differential embedded composite spun yarn, using the spinning device for directional drainage type differential embedded composite spun yarn to prepare embedded spinning, the spinning method is as follows:

[0015] The staple fiber strands are fed through the bell mouth and enter the rear stretching area, and are delivered to the front stretching area through the middle roller and the middle leather roller, and are transmitted from the jaws of the front roller and transported into the negative pressure adsorption conveying component; the filaments pass through the guide wheel and the jaws of the front roller and are sent to the negative pressure adsorption conveying component; the filaments and staple fiber strands are twisted and converged into yarns, which become differentially embedded composite yarns and are transported downward by the grid ring through the transmission rubber roller; the differentially embedded composite yarn is transported by the grid ring to the transmission rubber roller and the lower part of the transmission roller, and enters the yarn winding unit to be wound on the bobbin.

[0016] Preferably, the spinning method of the directional drainage differential embedded composite spun yarn is as follows:

[0017] The staple fiber strands are fed through the bell-shaped mouth, and enter the rear stretching area under the action of the rear roller and the rear leather roller. The staple fiber strands are pre-stretched and kept straight in the rear stretching area, and then delivered to the front stretching area, and then transferred out from the jaws of the front roller and enter the negative pressure adsorption conveying component; the filaments pass through the guide wheel and the jaws of the front roller, and are transported to the negative pressure adsorption conveying component; the staple fiber strands are fed through the bell-shaped mouth, and enter the rear stretching area under the action of the rear roller and the rear leather roller. The staple fiber strands are pre-stretched and kept straight in the rear stretching area, and then delivered to the front stretching area, and then transferred out from the jaws of the front roller and enter the negative pressure adsorption conveying component; the filaments pass through the guide wheel and the jaws of the front roller, and are transported to the negative pressure adsorption conveying component; the differential embedded composite yarn is transported to the transmission rubber roller and the lower part of the transmission roller by the grid ring, and enters the yarn winding unit and is wound on the bobbin.

[0018] On the negative pressure suction plate, the relative positions of the filaments and the roving whiskers are such that the filaments are located outside the roving whiskers, or the filaments and the roving whiskers overlap in pairs, or the filaments and the roving whiskers are alternated, or two strands of roving whiskers are fed into the same bell mouth; in the alternation of the filaments and the roving whiskers, the filaments are respectively 1mm to 6mm away from the fiber whiskers on the same side, and the filaments and the short fiber whiskers are twisted on the negative pressure suction plate to form a differentially embedded composite yarn and are transported downward by the grid ring through the transmission rubber roller;

[0019] The spinning device for directional drainage type differential embedded composite spun yarn is applied in the textile industry.

[0020] The synergistic effect of the embedded spinning technology, negative pressure suction and the embedded grooves in the ring in the present invention is to jointly optimize the stability of the fibers and the quality of the yarns during the spinning process. The embedded spinning technology realizes the dynamic twisting of the filaments and whiskers in the yarn-forming area in front of the front roller jaws, but this process is easily affected by the changes in the air ring and spinning tension, resulting in unstable twisting and fiber loss. The introduction of the negative pressure suction system effectively stabilizes the whisker fibers through the adsorption force generated by the suction plate, prevents them from being suspended in the twisting triangle area and being sucked away by the negative pressure, thereby reducing the scattering and loss of fibers and improving the fiber utilization rate. At the same time, the design of the embedded grooves in the ring provides a smooth channel for the yarn on the front roller, reduces the friction and uneven tension of the yarn during the winding process, and ensures the uniform winding of the yarn and the stability of the tension. The synergistic effect of these three significantly improves the quality of the yarn, reduces the unevenness and defects of the yarn, achieves a finer limit yarn fineness, and effectively solves the technical problems existing in the traditional embedded spinning process.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a spinning device for directional drainage differential embedded composite spun yarn, 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 the suction plate; the suction plate supports the staple fiber strands, thereby avoiding the phenomenon of staple fiber escape and scattering, reducing the performance defects of yarn strength, hairiness, and yarn evenness caused by the loss of staple fibers, thereby maximizing the utilization of staple fibers, effectively reducing costs, and maintaining a good environment for the spinning workshop; through the coordinated cooperation of various units, it can be applied to industry, realizing industrial high-speed 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 interior of the suction cavity is hollow and is provided with negative pressure suction. A suction plate is installed at the groove on the surface of the suction cavity, and a number of grid holes are evenly distributed on the suction plate. Negative pressure suction passes through the grid holes to adsorb the staple fiber strands onto the surface of the suction plate to support and transport the staple fiber strands, thereby avoiding the falling of staple fibers, reducing the performance deficiencies in yarn strength, hairiness, and evenness due to machine factors, and enhancing the overall performance of the yarn.

[0024] 3. In the auxiliary conveying component of the present invention, the projection of the front leather roller is maintained on the grid circle, and a groove is opened around the middle; during the spinning process, the front leather roller and the transmission roller press and rub the grid circle, causing the grid circle to roll, thereby driving the short fiber strands and filaments to move, and the grooves make the differentially embedded composite yarn not clamped by the front leather roller and the transmission roller, and the twist applied by the machine to the yarn can be transmitted upward to the filaments and short fibers on the surface of the suction plate, thereby avoiding the inevitable loss of short fibers in the spinning process.

[0025] 4. The circular embedded groove opened around the middle of the front roller in the present invention optimizes the winding process of the yarn. By providing a smooth channel, the friction and uneven tension of the yarn in the process of transferring from the front roller to the winding unit are reduced. In addition, by dynamically optimizing the yarn forming method and path, the conformation of fine feathers is effectively promoted, and the yarn instability caused by factors such as the roller quality, spinning speed and static electricity is reduced, thereby improving the stability and quality of the yarn, enhancing the spinning efficiency of the entire spinning device and the market competitiveness of the yarn products.

[0026] 5. The directional drainage differential embedded composite spinning device of the present invention only needs to modify the negative pressure suction plate and the front leather roller on the ordinary focusing spinning machine device to achieve the goal of maintaining the width of the short fiber strands without gathering; and the guide wheel can be adjusted in position to adjust the filament feeding position, thereby achieving the effect of differential embedded composite spinning to improve the yarn quality; the device has low modification cost, wide application range, and good industrial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the spinning device for directional drainage type differential embedded composite spun yarn of the present invention.

[0028] Figure 2 for Figure 1 An enlarged view of the local structure of the directional drainage differential embedded composite spinning yarn unit.

[0029] Figure 3 for Figure 1 Schematic diagram of the specific structure of the directional drainage differential embedded composite spinning yarn unit.

[0030] Figure 4 Schematic diagram of the center feeding of a single roving.

[0031] Figure 5 Schematic diagram of the coincident feeding of filament and roving.

[0032] Figure 6 Schematic diagram of intermittent feeding of filament and roving.

[0033] Figure 7 This is the short fiber disintegration situation in the traditional non-supported state for 20 minutes.

[0034] Reference numerals

[0035] S1: roving A; S2: roving B; S11: staple fiber strand 1 formed by stretching roving strand A; S21: staple fiber strand 2 formed by stretching roving strand B; F1: filament A; F2: filament B; 10: feeding unit; 11: bell mouth; 12: back roller; 13: back roller; 14: middle roller; 15: middle roller; 16: godet; 17: front roller; 20: differential embedded composite spinning Unit; 21: auxiliary conveying component; 21-1: front rubber roller; 21-2: bridge connecting component; 21-3: transmission rubber roller; 22: transmission gear; 23: negative pressure adsorption conveying component; 23-1: negative pressure suction plate; 23-2: suction cavity; 23-3: transmission roller; 23-4: grid ring; 30: winding unit; 31: yarn guide hook; 32: wire ring; 33: program; 34: yarn tube. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is 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 due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0038] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0039] Example 1 Single roving centered double core yarn feeding:

[0040] See also Figure 1 As shown, a schematic structural diagram of a spinning device for directional drainage differential embedded composite spun yarn comprises a feeding unit 10, a differential embedded composite spinning unit 20 and a winding unit 30; in the feeding unit 10, the coarse yarn AS1 is fed by a bell mouth 11, and is output from the front roller 17 into a staple fiber sliver AS11 through a rear stretching zone and a front stretching zone; the staple fiber sliver AS11 is attached to a mesh ring 23-4 by negative pressure suction, and then is twisted and merged with the feeding filaments A F1 and filaments B F2; and is transported to the yarn winding unit 30 by the mesh ring 23-4; the yarn winding unit is finally wound on a bobbin 34 via a yarn guide hook 31, a wire ring 32 and a guide ring 33.

[0041] The spinning device of the directional drainage differentially embedded composite spun yarn avoids the phenomenon of short fiber escape and scattering by supporting the short fiber sliver AS11 by the suction plate 23-1, reduces the performance defects of yarn strength, hairiness, and yarn evenness caused by the loss of short fibers, maximizes the utilization of short fibers, effectively reduces costs, and can maintain a good environment in the spinning workshop; through the coordinated cooperation of various units, it can be applied to industry, realizes industrial high-speed spinning, and the prepared differentially embedded composite yarn has good comprehensive performance and a wide range of market applications.

[0042] See also Figure 2 , Figure 3 The auxiliary conveying component 21 includes a front roller 21-1, a bridge connecting component 21-2, and a transmission roller 21-3. The front roller 21-1 fits with the front roller 17 to stretch the staple fiber strands AS11 entering the front stretching zone. The bridge connecting component 21-2 is used to connect the front roller 21-1 and the transmission roller 21-3. A groove is opened around the middle of the transmission roller 21-3. The transmission roller 21-3 interacts with the transmission roller 23-3 to give friction to the grid ring 23-4 to transmit it; 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 grid ring 23-4. The stretched staple fiber strands AS11 are conveyed to the suction plate 23-1, and the negative pressure suction inside the suction cavity 23-2 acts on the staple fiber strands A through the suction slots on the suction plate 23-1. S11, the filaments attached to the grid ring 23-4 and guided by the guide wheel 16 are twisted with the short fiber strips A S11 on the negative pressure suction plate 23-1 to form a differentially embedded composite yarn; the present invention utilizes the suction plate to increase the clamping force of the negative pressure suction cavity on the short fibers, reduces the loss of short fibers, reduces the hairiness on the yarn surface, reduces the waste of short fibers, reduces the cost of processing scattered short fibers, and also increases the yarn quality.

[0043] See also Figure 4 The stretched staple fiber strip AS11 is transported to the mesh ring 23-4 through the front roller 17, and the negative pressure inside the negative pressure suction chamber 23-2 makes the staple fiber strip AS11 tightly attached to the mesh ring 23-4 and transported to the transmission roller 23-3; at the same time, the filaments A F1 and B F2 are transported to the mesh ring 23-4 through the front jaw by the front roller 17, and the staple fiber strip AS11 wraps the filament B F2, and the filament A F1 wraps the staple fiber strip AS11 and the filament B F2 on the outside to become a differential embedded composite yarn and output from the transmission 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 7200r / min; twist is 57.7T / 10cm; front roller speed is 10.29m / min; total draft multiple is 34.74; cortical cotton fiber linear density is 17.5tex.

[0046] The innovation of this embodiment 1 lies in the use of a unique yarn structure and synergy, in which the staple whiskers AS11 are located at the core of the yarn, and the filaments B F2 and filaments A F1 are continuously and alternately wrapped on the outside to form a composite wrapping structure. This structure, combined with the efficient adsorption of the negative pressure suction system, provides a stable holding force for the staple whiskers, ensuring that they are accurately fixed on the suction plate during the spinning process, effectively reducing the escape and scattering of fibers. In addition, the alternating wrapping of the filaments not only enhances the structural stability of the yarn, but also moderately offsets the over-fitting phenomenon that may be caused by the suction system through the pressure and friction generated by the wrapping, further stabilizes the arrangement of the fibers, and makes the yarn structure more compact and uniform. Further, the circular ring embedded groove opened around the middle of the front roller plays a key role in this process, which provides a smooth channel for the newly formed yarn, so that the yarn can smoothly transition from the supporting surface to the winding unit without additional friction and pressure. This design reduces the possible breakage or frizziness of the yarn during the transmission process, ensuring the uniformity and quality of the yarn. At the same time, the presence of the grooves also helps to maintain uniform tension of the yarn and avoid 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 improves the overall quality of the yarn product, enhances the spinnability and post-processing performance of the yarn, so that the yarn of the present invention has 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 embedded spinning device and method, which is a conventional embedded spinning device, and the method is to suspend the intertwining area of ​​filaments and staple fibers to obtain embedded spinning yarn; the embedded spinning yarn material, feeding position and process parameters used are consistent with those of Example 1. The strength, hairiness and evenness of the yarn spun in this comparative example 1 are inferior to those of the yarn spun in Example 1.

[0049] Example 2: Double core yarn and double staple fibers are fed together:

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

[0051] See also Figure 1As shown, a spinning device and method for directional drainage differential embedded composite spinning yarn, comprising a feeding unit 10, a differential embedded composite spinning unit 20 and a winding unit 30; in the feeding unit 10, coarse yarn AS1 and coarse yarn BS2 are fed in two ways by a bell mouth 11, and are output from the front roller 17 into short fiber whiskers AS11 and short fiber whiskers B S21 through a rear drafting zone and a front drafting zone; the short fiber whiskers AS11 and the short fiber whiskers B S21 are adsorbed on the mesh ring 23-4 by the negative pressure suction effect, and at the same time, the filaments A F1 and the filaments B F2 are transported to the mesh ring 23-4 through the front jaws by the front roller 17, the filaments A F1 are located at the center of the short fiber whiskers AS11 and are wrapped with the core, and the filaments B F2 are located at the center of the short fiber whiskers B S21 center and core wrap; the two core-wrapped yarns formed merge 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 on the yarn tube 34 via the yarn guide hook 31, the wire ring 32, and the outline 33.

[0052] See also Figure 2 , Figure 3 The auxiliary conveying component 21 includes a front roller 21-1, a bridge connecting component 21-2, and a transmission roller 21-3. The front roller 21-1 is fitted with the front roller 17 to stretch the staple fiber strands AS11 and B S21 entering the front stretching zone. The bridge connecting component 21-2 is used to connect the front roller 21-1 and the transmission roller 21-3. A groove is opened around the middle of the transmission roller 21-3. The transmission roller 21-3 interacts with the transmission roller 23-3 to give friction to the grid ring 23-4 to make it transmit; 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 grid ring 23-4. The stretched staple fiber strands AS11 and B S21 S21 is transported to the suction plate 23-1, and the negative pressure suction inside the suction cavity 23-2 acts on the staple fiber strands AS11 and the staple fiber strands B S21 through the suction slots on the suction plate 23-1, so that the filament F1 attached to the grid ring 23-4 and guided by the guide wheel 16 overlaps and wraps the staple fiber strands AS11 on the negative pressure suction plate 23-1, and the filament F2 overlaps and wraps the staple fiber strands B S21 on the negative pressure suction plate 23-1, and finally the two core-wrapped yarns are twisted into differentially embedded composite yarns. The present invention utilizes the suction plate to increase the holding force of the negative pressure suction cavity on the staple fibers, reduces the loss of staple fibers, reduces the hairiness on the yarn surface, reduces the waste of staple fibers, reduces the cost of processing scattered staple fibers, and also increases the yarn quality.

[0053] See also Figure 5The stretched staple fiber strands AS11 and B S21 are transported to the mesh ring 23-4 through the front roller 17, and the negative pressure inside the negative pressure suction chamber 23-2 makes the staple fiber strands AS11 and B S21 tightly attached to the mesh ring 23-4 and transported to the transmission roller 23-3; at the same time, the filaments A F1 and B F2 are transported to the mesh ring 23-4 through the front jaw by the front roller 17, the filaments A F1 are located at the center of the staple fiber strand AS11 and are wrapped with a core, the filaments B F2 are located at the center of the staple fiber strand B S21 and are wrapped with a core, and the two core-wrapped yarns are twisted together to become differentially embedded composite yarns and output from the transmission 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 7200r / min; twist is 57.7T / 10cm; front roller speed is 10.29m / min; total draft multiple is 34.74; cortical cotton fiber linear density is 17.5tex.

[0056] The preparation process of this scheme is as follows: the filament A F1 and the filament B F2 are transported to the grid ring 23-4 by the front roller 17 through the front jaw, the filament A F1 is located at the center of the staple fiber sliver AS11 and is core-wrapped, the filament B F2 is located at the center of the staple fiber sliver B S21 and is core-wrapped, and the two core-wrapped yarns are twisted together to form a double-core-wrapped twisted structure yarn, which can effectively reduce the hairiness and enhance the uniformity of the yarn.

[0057] The innovation of Example 2 is that a differentially embedded composite spinning technology with a double core-wrapped twisting structure is adopted. Through a specially designed feeding method, filament A F1 and filament B F2 are placed in the center of the staple whisker AS11 and the staple whisker B S21 for core-wrapping, and then the two strands of yarn are twisted together to form a differentially embedded composite yarn with excellent mechanical properties and surface quality. The yarn of this structure has not only been significantly improved in internal strength and stability, but also improved the uniformity of the yarn by reducing the hairiness on the surface of the yarn. The application of the negative pressure suction system provides a stable holding force for the staple whiskers through the precise control of the suction plate, ensures the orderly arrangement and close combination of the fibers during the spinning process, and reduces the escape and scattering of the fibers. In addition, the circular ring embedded groove designed on the front leather roller provides a smooth channel for the yarn, optimizes the transfer process of the yarn from the drafting zone to the winding unit, reduces friction and uneven tension, and further improves the quality of the yarn. The comprehensive application of these innovations enables the yarn of Example 2 to have good softness and processability while maintaining high strength, making it suitable for a wider range of textile applications.

[0058] Comparative Example 2: Double core yarn and double staple fibers are fed together:

[0059] Comparative Example 2 provides an embedded spinning device and method, which is a conventional embedded spinning device, and the method is to suspend the intertwining area of ​​filaments and staple fibers to obtain embedded spinning yarn; the embedded spinning yarn material, feeding position and process parameters used are consistent with those of Example 2. The strength, hairiness and evenness of the yarn spun in this comparative example are inferior to those of the yarn spun in Example 2.

[0060] Example 3: Dual-core yarn and dual-staple fiber are fed alternately:

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

[0062] See also Figure 1 As shown, a spinning device and method for directional drainage differential embedded composite spinning yarn, comprising a feeding unit 10, a differential embedded composite spinning unit 20 and a winding unit 30; in the feeding unit 10, coarse yarn AS1 and coarse yarn BS2 are fed in two ways by a bell mouth 11, and are output from the front roller 17 into short fiber whiskers AS11 and short fiber whiskers B S21 through a rear drafting zone and a front drafting zone; the short fiber whiskers AS11 and the short fiber whiskers B S21 are adsorbed on the grid ring 23-4 by the negative pressure suction effect, and at the same time, the filaments A F1 and the filaments B F2 are transported to the grid ring 23-4 through the front jaws by the front roller 17, the filaments A F1 are located on the right side of the short fiber whiskers AS11 and are twisted with each other, and the filaments B F2 are located on the right side of the short fiber whiskers B S21 is wound on the right side and the core is wrapped; the two yarns formed are merged into a differentially 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 on the yarn tube 34 via the yarn guide hook 31, the wire ring 32, and the outline 33.

[0063] See also Figure 2 , Figure 3The auxiliary conveying component 21 includes a front roller 21-1, a bridge connecting component 21-2, and a transmission roller 21-3. The front roller 21-1 is fitted with the front roller 17 to stretch the staple fiber strands AS11 and B S21 entering the front stretching zone. The bridge connecting component 21-2 is used to connect the front roller 21-1 and the transmission roller 21-3. A groove is opened around the middle of the transmission roller 21-3. The transmission roller 21-3 interacts with the transmission roller 23-3 to give friction to the grid ring 23-4 to make it transmit; 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 grid ring 23-4. The stretched staple fiber strands AS11 and B S21 S21 is transported to the suction plate 23-1, and the negative pressure suction inside the suction cavity 23-2 acts on the staple fiber strands AS11 and the staple fiber strands B S21 through the suction slots on the suction plate 23-1, so that the filament F1 attached to the grid ring 23-4 and guided by the guide wheel 16 is twisted on the right side of the negative pressure suction plate 23-1 and the staple fiber strand AS11, and the filament F2 is wound and cored on the right side of the negative pressure suction plate 23-1 and the staple fiber strands B S21, and finally the two yarns are twisted into differentially embedded composite yarns; the present invention utilizes the suction plate to increase the clamping force of the negative pressure suction cavity on the staple fibers, reduces the loss of staple fibers, reduces the hairiness on the yarn surface, reduces the waste of staple fibers, reduces the cost of processing scattered staple fibers, and also increases the yarn quality.

[0064] See also Figure 5 The stretched staple fiber strands AS11 and B S21 are transported to the mesh ring 23-4 through the front roller 17, and the negative pressure inside the negative pressure suction chamber 23-2 makes the staple fiber strands AS11 and B S21 tightly attached to the mesh ring 23-4 and transported to the transmission roller 23-3; at the same time, the filaments A F1 and B F2 are transported to the mesh ring 23-4 through the front jaw by the front roller 17, the filaments A F1 are located on the right side of the staple fiber strand AS11 and twisted with each other, the filaments B F2 are located on the right side of the staple fiber strand B S21 and are wound around the core, and the two yarns are twisted together to become differentially embedded composite yarns and output from the transmission 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 7200r / min; twist is 57.7T / 10cm; front roller speed is 10.29m / min; total draft multiple is 34.74; cortical cotton fiber linear density is 17.5tex.

[0067] The preparation process of this scheme is as follows: the filament A F1 and the filament B F2 are conveyed to the grid ring 23-4 by the front roller 17 through the front jaw, the filament A F1 is located at the center of the staple fiber strip AS11 and twisted with each other, the filament B F2 is located at the center of the staple fiber strip BS21 and twisted with each other, and the two twisted yarns are twisted together to form a Silo core-spun twisted structure, which can effectively improve the yarn strength.

[0068] The innovation of Example 3 is that the interval feeding method is adopted to effectively arrange and twist the filaments A F1 and filaments B F2 with the staple whiskers AS11 and the staple whiskers BS21 in space, forming a differential embedded composite yarn with a special structure. In this process, the filaments A F1 and the staple whiskers AS11 are adjacent and twisted, while the filaments B F2 are wound around the staple whiskers BS21. This design not only enhances the internal bonding force of the yarn, but also improves the mechanical properties and surface quality of the yarn through the orderly arrangement of the filaments and staple fibers. The negative pressure suction system ensures the stable adsorption and orderly arrangement of the fibers during the spinning process through the precise control of the suction plate, reduces the loss of staple fibers and the hairiness on the yarn surface, thereby improving the quality of the yarn. In addition, the circular ring embedded groove on the front leather roller provides a smooth transition path for the yarn, optimizes the transfer process of the yarn from the drafting zone to the winding unit, reduces friction and uneven tension, and further improves the quality of the yarn. The synergistic effect of these three not only improves the spinning efficiency, but also significantly enhances the comprehensive performance of the yarn, making the yarn more competitive in the market and have a wider range of applications.

[0069] Comparative Example 3: Double core yarn and double staple fibers are fed at intervals:

[0070] Comparative Example 3 provides an embedded spinning device and method, which is a conventional embedded spinning device, and the method is to suspend the intertwining area of ​​filaments and staple fibers to obtain embedded spinning yarn; the embedded spinning yarn material, feeding position and process parameters used are consistent with those of Example 3. The strength, hairiness and evenness of the yarn spun in this comparative example are inferior to those of the yarn spun in Example 3.

[0071] Comparative Example 4: Double core yarn and double staple fibers are fed at intervals:

[0072] Comparative Example 4 provides an embedded spinning device and method, which is basically the same as Example 3, except that the driving roller 21-3 has no groove around the middle to obtain an embedded spinning line; the embedded spinning line material, feeding position and process parameters used are the same as those of Example 3. The strength, hairiness and evenness of the yarn spun in this comparative example are inferior to those of the yarn spun in Example 3.

[0073] Comparative Example 5: Double core yarn and double staple fibers are fed at intervals:

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

[0075] The mechanical performance index, hairiness index, and yarn evenness index of the embedded spun yarns prepared in Examples 1 to 3 were compared with those in Comparative Examples 1 to 5, and the results are shown in the following table.

[0076] Table 1 Comparison results of yarn mechanical properties

[0077]

[0078]

[0079] Table 2 Comparison results of yarn hairiness index

[0080] Hairiness 1mm 2mm 3mm or more 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 results of yarn evenness index

[0082]

[0083]

[0084] As can be seen from Table 1, the yarns of Examples 1 to 3 are generally superior to the corresponding yarns of Comparative Examples 1 to 5 in terms of strength indicators such as maximum force, elastic modulus and elongation at break. This shows 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 embodiments have higher mechanical properties, which means that the yarns have a stronger ability to withstand maximum tensile force and elongation at break, which makes the yarns more elastic and durable during use. These improved strength indicators make the yarns of the present invention more suitable for application scenarios requiring high strength and high stability, and also reflect the significant advantages of the present invention in improving yarn quality.

[0085] As can be seen from Table 2, the yarns of Examples 1 to 3 perform better in terms of hairiness index, which is specifically reflected in that the number of hairiness above 1 mm, 2 mm and 3 mm is lower than that of the corresponding yarns of Comparative Examples 1 to 5. Hairiness is an important factor affecting the appearance and quality of yarns. Excessive hairiness can cause entanglement and breakage of the yarns in subsequent processing, affecting the surface finish and feel of the fabric. The present invention significantly reduces the hairiness generated by short fiber whiskers and filaments during the spinning process by adopting differential embedded composite spinning technology. This is due to the synergistic effect of the negative pressure suction system and the embedded grooves in the ring, which together ensure the stable control of the fibers during the spinning process and reduce the escape and scattering of the fibers. In addition, the orderly arrangement and tight wrapping of the filaments and staple fibers also help to further reduce the generation of hairiness.

[0086] As can be seen from Table 3, the yarn evenness indexes of Examples 1 to 3 are generally better than those of the corresponding Comparative Examples 1 to 5. The yarn unevenness is an important indicator for measuring yarn quality, which reflects the uniformity of the thickness of the yarn in the length direction. A lower coefficient of variation means that the yarn is more uniform as a whole, without obvious fluctuations in thickness, which helps to improve the smooth progress of the subsequent weaving process and the quality of the final product. The yarn unevenness values ​​of -50%, +50%, 200%, and 400% in the embodiment are low, indicating that the yarn performs better in controlling the uniformity of each thickness level. This improved yarn evenness performance is due to the special spinning device and method used in the present invention, especially the use of the negative pressure suction system and the groove embedded in the ring, which ensure the uniform distribution and orderly arrangement of the fibers during the spinning process. In addition, the alternating wrapping of filaments and staple fibers also helps to further improve the yarn evenness.

[0087] In summary, the present invention provides a spinning device for directional drainage differential embedded composite spun yarn, a feeding unit, a differential embedded composite spinning unit and a winding unit; the optimized combination and twisting of short fiber whiskers and filaments are realized, the mechanical properties of the yarn are significantly improved, the hairiness is reduced and the yarn uniformity is improved. The present invention uses a negative pressure suction system to effectively support the short fiber whiskers, prevent the escape and scattering of the fibers, and at the same time, through the design of the circular ring embedded groove on the front roller, the yarn forming and transmission path are optimized, and the tension unevenness and friction of the yarn during the winding process are reduced, thereby reducing the instability of the yarn. In addition, the spinning device of the present invention can adapt to different spinning process parameters, and by adjusting the feeding method and position of the filaments and short fibers, a variety of yarn structures, such as core-wrapped structure, wrapped structure and ply-like structure, are realized to meet the needs of different application scenarios. This innovative spinning technology not only improves the overall quality of the yarn, but also enhances the market competitiveness of the yarn, and has broad industrial application prospects and economic benefits.

[0088] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A spinning device for directional drainage differential embedded composite spun yarn, characterized in that: It comprises a feeding unit (10), a differential embedded composite spinning unit (20) and a winding unit (30).

2. The spinning device for directional drainage differential embedded composite spun yarn according to claim 1, characterized in that: The feeding unit (10) comprises 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 filaments and can be moved to adjust the distance between the filaments and the staple fiber strands so that the twisting position is maintained on the negative pressure suction plate (23-1). The coarse yarn in the staple fiber feeding unit is fed through a bell mouth (11), and is output from the jaws of the front roller (17) through the rear stretching zone and the front stretching zone to the differential embedded composite spinning unit (20).

3. The spinning device for directional drainage differential embedded composite spun yarn according to claim 1 or 2, characterized in that: The differential embedded composite spinning unit (20) is composed of an auxiliary conveying component (21), a transmission gear (22) and a negative pressure adsorption conveying component (23); the auxiliary conveying component (21) and the front roller (17) clamp the coarse yarn strands that have passed through the rear zone drawing to stretch them, and drive the grid ring (23-4) so ​​that the grid ring (23-4) conveys the short fiber strands in the negative pressure suction supporting area; the negative pressure adsorption component (23) supports and adsorbs the fibers transported by the auxiliary conveying component (21) to maintain the weight of the fibers and prevent them from being lost before entering the transmission rubber roller (21-3).

4. The spinning device for directional drainage differential embedded composite spun yarn according to claim 3, characterized in that: The auxiliary conveying component (21) is composed of a front rubber roller (21-1), a bridge connecting component (21-2) and a transmission rubber roller (21-3); the front rubber roller (21-1) is combined with the front roller (17) to re-stretch the coarse yarn strands that have been stretched in the rear area and convey them to the supporting area; the bridge connecting component (21-2) connects the front rubber roller (21-1) and the transmission rubber roller (21-3); the transmission rubber roller (21-3) is combined with the transmission roller (23-3) to provide friction force to the grid ring (23-4) to enable transmission; The negative pressure adsorption conveying component (23) comprises a negative pressure suction plate (23-1); a suction cavity (23-2); a transmission roller (23-3); and a mesh ring (23-4); the stretched strands pass through the front rollers and reach the negative pressure suction plate (23-1), are controlled by the negative pressure adsorption conveying component (23) on the mesh ring (23-4) without falling apart, and are twisted with the filaments to form a single-strand twisted yarn.

5. The spinning device for directional drainage differential embedded composite spun yarn according to claim 3, characterized in that: A circular embedded groove is formed around the middle of the transmission rubber roller (21-3); the embedded spinning thread is formed on the supporting surface, passes through the groove and reaches the winding unit (30) to be wound into a tube.

6. The spinning device for directional drainage differential embedded composite spun yarn according to claim 4, characterized in that: The negative pressure air suction plate (23-1) is provided with a plurality of slots, the number of the slots being between 5 and 50.

7. The spinning device for directional drainage differential embedded composite spun yarn according to claim 1, characterized in that: The winding unit (30) comprises a yarn guide hook (31), a wire ring (32), a yarn collar (33), and a yarn tube (34).

8. A spinning method for directional drainage differential embedded composite spun yarn, characterized in that: The spinning device for directional drainage differential embedded composite spun yarn described in any one of items 1 to 7 is used to prepare embedded spinning, and the spinning method is as follows: The staple fiber strands are fed through the bell mouth (11) and enter the rear stretching area, and are delivered to the front stretching area through the middle roller (14) and the middle leather roller (15), and are transmitted from the jaws of the front roller (17) and transported into the negative pressure adsorption transport component (23); the filaments pass through the guide wheel (16) and the jaws of the front roller (17), and are delivered to the negative pressure adsorption transport component (23); the filaments and the staple fiber strands are twisted and converged into yarns, becoming differentially embedded composite yarns and being transported downwards by the grid ring (23-4) through the transmission rubber roller (21-3); the differentially embedded composite yarns are transported by the grid ring (23-4) to the lower part of the transmission rubber roller (21-3) and the transmission roller (23-3), and enter the yarn winding unit (30) to be wound on the yarn tube (34).

9. The spinning method of directional drainage differential embedded composite spun yarn according to claim 8, characterized in that: The spinning method is as follows: The staple fiber strands are fed through the bell mouth (11) and enter the rear stretching area under the action of the rear roller (12) and the rear leather roller (13). The staple fiber strands are pre-stretched and kept straight in the rear stretching area before being delivered to the front stretching area, and then delivered from the jaws of the front roller (17) and enter the negative pressure adsorption conveying component (23); the filaments pass through the guide wheel (16) and the jaws of the front roller (17) and are transported to the negative pressure adsorption conveying component (23); the differentially embedded composite yarn is transported by the grid ring (23-4) to the transmission rubber roller (21-3) and the lower part of the transmission roller (23-3), and enters the yarn winding unit (30) to be wound on the yarn tube (34); On the negative pressure suction plate (23-1), the relative positions of the filaments and the coarse yarn whiskers are such that the filaments are located outside the coarse yarn whiskers, or the filaments and the coarse yarn whiskers overlap each other, or the filaments and the coarse yarn whiskers are alternated, or two coarse yarn whiskers are fed into the same bell mouth; in the alternation between the filaments and the coarse yarn whiskers, the filaments are respectively 1 mm to 6 mm away from the fiber whiskers on the same side, and on the negative pressure suction plate (23-1), the filaments and the short fiber whiskers are twisted to form a differentially embedded composite yarn and are transported downward by the grid ring (23-4) via the transmission rubber roller (21-3).

10. The use of a spinning device for directional drainage differential embedded composite spun yarn according to any one of claims 1 to 7, characterized in that: Used in textile industry.

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