The triangle area makes the yarn more ideal in the main draft zone. Due to the fact that the fiber strands in the compact spinning process are narrower and wider in the agglomeration process, more fibers withstand the tensile tension of the yarn than the regular ring yarns with triangular regions during yarn formation, so the yarns are compacted at the same twist. Stronger. c) In the traditional ring spinning, the spinning triangle is formed when the fiber leaves the front roller to the twisting point. The spinning triangle is an uncontrolled weak zone with few twists. Under normal circumstances Close to the triangle area is prone to breakage of the yarn, and the strength of the spun yarn in the spinning triangle is negatively related to the spinning speed. Therefore, eliminating the spinning triangle area can increase the spinning speed, increase the strength of the spun yarn, reduce the hairiness, and reduce the flying flower. And the yarn breaks less. 2 Comparing compact spinning with conventional ring spinning When the twist is reduced, the strength of the yarn is not significantly reduced, so the twist of the compact yarn can be reduced compared to the ordinary ring yarn at the same count, which means that the same yarn can be spun. Increase the speed of extraction, increase the output and make the fabric feel soft. Compact hairs have less hairiness. Hairiness of more than 3mm is 31% less than regular ring yarn. Therefore, the time for singeing is shorter and the weight of the yarn is reduced. On the one hand, raw materials can be saved, and on the other hand, when rewinding, Dust remaining on the yarn during singeing can be omitted. b) In the front area of ​​the three-roller triple-drawing drafting system with ring spinning, a holed cage or perforated apron is installed to complete the condensation of the negative pressure airflow, and the fiber bundle is condensed by the negative pressure airflow. The function is narrowed, and each fiber is spun into the yarn body, so that the breaking elongation and the breaking strength of the compact spinning are more effectively eliminated. The woven fabric with the compact spinning weave has a higher breaking strength. Elongation at break and tear strength (knit) Table 1 compares the properties of combed yarns from compact spun combed yarns and conventional ring spun yarns. It can be seen from Table 1 that the quality of compact spinning is better than that of ordinary ring spinning. Teacher, has long been engaged in cotton textile technology work. Table 1 Quality comparison of package yarns Tightly spun ring yarn Ordinary ring yarn (1) Ordinary ring yarn (2) Density/tex coefficient of dryness CVm/% Detail (1 to 50) Day (+50) (with/with claws) neps (hairiness index H breaking strength/(cN/tex strength variation coefficient CV/% elongation at break/break elongation CV/note: 1. Ordinary ring spinning (1 The quality of raw cotton is better than that of compact spinning ring yarns; 2. The quality of raw cotton of common ring spinning (2) is the same as that of compact spinning ring yarns. It can be seen from Table 1 that the spinning quality of compact spinning ring yarn is better than that of ordinary ring spinning (1) and (2). Under the above-mentioned conditions of cotton blending, the cotton spinning volume of compact spinning ring combed yarn is higher than that of ordinary ring spinning. Spindle spinning has a low amount of cotton, but the spinning quality is better than ordinary ring combed yarns with a large amount of cotton dropped (see Table 2). Table 2 Comparison of breaking strength between compact ring yarn and common ring yarn Yarn/tex breaking strength/breaking elongation/strength unevenness/Note: A is ordinary ring yarn; B is tight ring yarn 3 compact spinning Benefits Impact on Downstream Processes 3.1 Knitting On the knitting machine, feather loops woven on the fabric form neps, causing needle breakage and holes. Due to the relatively low number of feather loops, the efficiency of the knitting machine can be significantly increased, the yield is increased, the breakage rate during weaving is low, the weaving weave is reduced accordingly, the fabric has a good appearance, and the product quality is improved. Since the compact spinning body is smooth, the twist of the yarn can also be reduced, thereby reducing the wear on the yarn guide elements, the knitting needles, and the gram pieces. It is estimated that when the compact spinning yarn is applied on the knitting machine, the hairiness is reduced by 60% compared with the ordinary ring yarn. The waxing treatment can be omitted and the production cost can be reduced. Compact spinning ring yarns have been used on warp knitting machines to develop warp-knitted fabrics. 3.2 Yarn warping The compact spinning ring yarns have low hairiness and high strength. The warping breakage can be reduced by 30%, the work volume of the joints can be reduced, and the warping efficiency and yield can be improved. Due to the low yarn hairiness, the phenomenon of blocking between yarns during sizing is reduced, thus improving the quality of the sizing yarn, reducing the amount of sizing, saving over 50% of the chemical slurry, reducing the sizing costs, and making the desizing rate Reduce and reduce environmental pollution. 3 Weaving Despite the low sizing rate of compact spinning yarn sizing, there are few broken ends in the loom. The compact spinning ring yarn has good weaving processability, reducing the warp and weaving ends by 50% and 30% respectively, greatly improving the efficiency of the loom and reducing the weaving cost. In actual operation, the end-of-cut rate of the 100,000 Wei of the rapier loom is reduced by 33% and that of the air-jet looms is reduced by 45%. After the traditional ring-spun yarn is changed to the compact ring-spun yarn on the air-jet loom, the loom draw rate can be increased. 3.4 Finishing After printing and dyeing, the fabric after printing and dyeing is more glossy than the ordinary ring yarn and has high strength and anti-pilling. In the finishing process, the compact fabric has more obvious advantages, in particular, the shirt fabric has a large elongation recovery, and the appearance of the printed fabric is very beautiful due to the small hairiness. 4 The development of compact spinning technology A compact spinning machine and the SUESSEN Elite Compact Spinning Machine were first introduced. They can be used to produce a variety of staple fiber raw materials and yarns. Zinser, Toyota, and Rotorcraft are among the companies that have successively produced compact spinning machines. The compact spinning technology has various designs and can be adapted to various fiber lengths and can be processed to produce images. Short fibers such as cotton fibers can also be processed as long fibers like wool, with high spinning quality, and can also produce long-staple cotton with high block combed yarns. 1 Swiss Rieter Com4 compact spinning machine fibers are condensed in the drafting zone by the secondary air flow with holes, so that the fiber is completely controlled when leaving the front roller jaws, thus eliminating the spinning triangle, and in addition, the front roller It also has the effect of preventing the spread of divergence to the condensate area. Due to the special design of the coacervation zone and the high coagulation efficiency of the yarn guide elements, the spinning quality is good. The Com4 compact spinning machine consists of a perforated basket (a perforated front roller), a vacuum suction tube, and a negative pressure air flow guide element. The direct-drive holed cage surface is wear-resistant and prevents the fiber from sticking. A stable negative-pressure airflow and a specially shaped suction slot are connected to the suction pipe system of the machine (see below). The Com4 compact spinning machine has a large diameter (59mm) because the front roller is changed to a porous vacuum with a hole and the roller diameter is large (59mm). Therefore, the floating area is larger in the area before quick drafting and it is not suitable for spinning spun yarns. Experts believe that the Com4 compact spinning machine should develop towards the processing of long fibers (such as wool) compact yarns. The Com4 compact spinning machine is sold only on the whole machine, and ordinary ring spinning machines cannot be modified in the form of compact spinning components, which limits the development of the Com4 spinning technology. 4.2 Sussen Elite System Compact Spinning Machine 4.2.1 When the fiber exits the drafting system, it immediately receives the agglomeration control of the porous apron with negative pressure. The perforated apron slides over the suction slot on the oblique shaped suction suction pipe, so that the fiber moves along with the suction slot, and at the same time it forms a lateral rolling and twists the bundle fiber. The negative pressure suction between spinning spindles should remain the same. In order to meet this requirement, the air pump is driven by the motor alone. Each air pump bears 20~30 spindles, which can make the negative pressure suction on each spindle equalize and reduce the spindle. difference. The effect of the negative pressure air flow makes the fibers very regular and the spinning quality is significantly improved. Elite compact spinning is mainly composed of agglomerates with apertured apron microholes, micropores on the apertured aprons, which do not suck away the fibers. Since the condition of the negative pressure between the ingot and the spindle of the entire spinning frame is very similar, the difference between the spindles is very small and very uniform (see). According to the density of the spun yarn, the negative pressure inspiration volume and pressure can be adjusted so as to achieve accurate coagulation and spin out uniform compact yarn. Speculation, the negative pressure condensation in compact spinning results in a total loss of fiber <0.2%. The fiber loss due to micropores is <0.1%. Therefore, this compact spinning technology operates stably. The Elite system does not spin the spinning triangle compactly. After the fiber leaves the front roller jaws, it is immediately subjected to twisting and aggregation control, and almost no fiber is lost. The compact spinning ring yarn is controlled by the negative pressure air flow and the apertured apron and is reduced by 40% to 60% compared to the ordinary ring spinning, which results in a high level of spinning quality. 4.2.2 SUESSEN also improved on the conventional ring spinning frame. A set of mechanisms to eliminate the spinning triangle was added outside the front roller clamp line to effectively control the movement of the fiber bundles, resulting in less hairiness. High-strength, even-smooth spinning yarn. 4.3 Toyota EST Compact Spinning Technology 4.3.1 Based on the Eisen compact spinning technology of SUESSEN, Toyota changed the front top roller drive guide top roller to the bottom four roller positive drive, called EST compact spinning. The front upper roll and the guide upper roll are changed to passive transmission (as shown). Under the condition that the positive roll of the two rolls maintains certain front speed ratio, the straightening requirements for the two upper roll rolls need not be strictly considered, thus reducing the Spinning mills have some management problems and financial burdens. In addition to a small number of textile machinery enterprises in China in the form of SUCE company EliTe in the country to transform the ring spinning machine, most textile companies have been in accordance with the Toyota EST compact spinning system on China's ring spinning frame modification, and User's welcome. 4.3.2 There are also problems with the EST compact spinning system: There is almost no pressurization of the exit roller, and the lead-out lead is affected. The original three-roller pressurization should be changed to four-roller pressurization, so that the pressurization of the guide roller can be implemented to ensure the accuracy of the lead. For example, in the EST compact spinning system, it is difficult to change the speed ratio of the front roller and the withdrawal roller to adapt to a certain number of spinning, which is limited by the geometric size. In spite of this, the application of Toyota EST compact spinning system to China's ring spinning machine has accelerated the development of compact spinning in China. 4.4 Zenser Compact Spinning System The Zenser compact spinning principle is basically similar to that of the SUESSEN EliTe. Combining not only pure cotton yarn but also other product range products, Zinser compact spinning has a good product adaptability. Its agglomeration mesh ring is a hole-synthetic rubber apron and can be used to spin all the main products. Variety. The compact spinning system of Toyota, Sussen and Zinser has high requirements for the air environment of the production workshop. The air-conditioning design must achieve a basic balance of the upper and lower suction, and the self-purification capability of the machine must be strong to achieve good results. . However, the compact rim of the Zinser compact spinning is a perforated synthetic rubber apron, and the mesh is too large, which affects the production rate. 4.5 Rocos Compact Spinning Technology 4.5.1? General Compact Spinning is the formation of compact yarns in the cohesive zone after drafting without the formation of a spinning triangle, and Rotocrat's Rocas compact spinning technology is not negative Press suction cotton and other systems, is the application of magnetic-mechanical principle to achieve compact yarn production, suitable for processing cotton, cotton and synthetic fiber blended yarn and purified fiber yarn, spinning coarse yarn to fine support yarn. The structure is mainly composed of a drafting roller, a yarn feeding roller, a magnetic compactor, a roller connecting bracket and a roving cotton locator between the rear roller and the middle iron roller (see). 4.5.2 An enclosed negative pressure chamber formed by the Rocos magnetic compactor and the bottom roller causes the fibers to be twisted in a parallel and tight state, making it impossible to form a triangular area, ensuring optimal fiber bundles. Agglomeration achieves the goal of reducing hairiness; at the same time, the arrangement of fibers in the yarn is more compact, the force is even, and the cohesion between the fibers is added, so that the strength of the yarn is also improved. 4.5.3 There are no negative pressure air flow, suction ducts, cages or mesh rings in the Rocos compact spinning system and no additional power is required. The Rokas Compact Spinning System is used. Spinning machines can be converted into compact spinning machines. Therefore, Roccas mechanical magnetic compact spinning technology has the characteristics of less investment, easy retrofit, easy maintenance, low operating cost, and good energy-saving effect. However, after Roxs compact yarns are processed and processed by printing and dyeing, many are entangled in The hairiness on the yarn body will be revealed again, affecting the fabric style. 5 Conclusion Compact spinning has become the main direction of the development of ring spinning machines, due to the small number of yarns in compact spinning (compact spinning ring yarn is about 80% lower than ordinary ring yarn hairiness), high strength (spun yarn strength can be improved 5%~10%. The strength and elongation rate of the yarn of the compact ring yarn are greatly improved.) The CV% and yarn defect of the compact ring yarn are better than those of the ordinary ring yarn. The yarn breakage rate is higher than that of the ordinary ring yarn. The spindle yarns are reduced by 30%~60%. The equivalent strength can be reduced by about 20%, and the yarn yield can be increased to improve the fabric's feel. Can reduce 6% to 12% of combed noil, without affecting the yarn quality. Because the tight ring yarns are good, there are fewer yarn defects, less hairiness, and the fibers are arranged in order in the yarn, it can replace some of the combed yarns. China's textile machinery enterprises that produce compact spinning components to modify the ring spinning frame system include: Mazuli, Wuxi Qiji, Huafang Technology, Tonghe Textile Machinery, Shanghai Second Textile Machinery, Jiandong, Rifa, Songbao, Dechang and After the other spinning machine company. With the increase in market demand, compact spinning will be a unified market for spindle spinning. Custom Metal Logo Tags, Metal Logo Tags,Metal Tag Shenzhen MingFengXing Art & Craft Products CO., LTD. , https://www.blankmedal.com