8. Since the beginning of the era of ring spinning a large number of changes had occurred in ring spinning frame for continuous improvement in Production, Quality and Efficiency…And if the new technologies are much faster in productivity then why still “Ring Spinning” is considered to the most reliable, profitable, and successful yarn manufacturing technique…??? That’s why we have selected this topic. SoNuu Shah
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10. Besides of comparatively low productivity as compared to other techniques, Why Still Ring Spinning…???
11. Quality of yarn delivered from all yarn manufacturing techniquesSoNuu Shah
12. Speed overviews Figure 1 represents the current offerings in spinning machines and their comparative spinning speeds. SoNuu Shah
13. Beginning of Ring Spinning Era After the Industrial revolution (1764-1784) Mule Spinning gained attention throughout the world. Continuous efforts were being made to refine this system of spinning. Later, Ring Spinning was introduced after some modifications in Mule Spinning System. The basic technology of the Ring Spinning remained unchanged. Ring Spinning Systems have been refined during the last 30 years, the ultimate objectives of spinning dialectologists are focused on higher production speed, combined with adequate quality. SoNuu Shah
14. Ring Spinning Frame The most widely used spinning technique in the world due to its high speed and good quality. The Quality of yarn produced by this technique is considered to be the best quality yarn at a high speed. SoNuu Shah
15. Advantages Production of high strength yarns. Spinning of fine count yarns. Proper for special yarns. It is universally applicable (any material can be spun). The know how for operation of machine is well established accessible to everyone. It is flexible as regards quantities (blend and lot size). Since the speeds in drawing section are best controlled, yarn evenness is excellent. But if short fibers are too much, yarn unevenness occurs. Fine yarns can be produced as compared to open-end system SoNuu Shah
16. Disadvantages Process stages are more numerous. Roving stage exists as an extra process compared to the other systems. Yarn breakages are more numerous as a result of ring traveler friction and yarn air friction. Interruptions, broken ends and piecing up problems exist because of the yarn breakages. The high speed of the traveler damages the fibers. The capacity of the cops is limited. Energy cost is very high. Low production rate. SoNuu Shah
17. Open End Spinning Open-end spinning is a technology for creating yarn without using a spindle. It was invented and developed in Czechoslovakia in Cotton Researching Institute in year 1963. Twist is provided by the turning of the rotor.
18. Open End Spinning Spool does not need to be rotated to insert twist Much larger spools can be wound 3-5 times faster than ring spinning Uniform but flexible yarn with better dye ability Carded yarns (coarser) Yarns for heavier fabrics such as denims, towels and poplins 20% more twisted but 15-20% weaker as the yarn is coarser Not suitable for man-made staple fibre spinning except rayon as the fiber finish clogs the rotor SoNuu Shah
21. Features 15-20% reduction in hairiness of yarn, the reduction being more pronounced in long length hairs 10-15% improvement in yarn tenacity Twist in yarn can be reduced by 10% while maintaining same yarn strength Better evenness of diameter and hairiness. Better abrasion resistance of yarn leading to fewer ends SoNuu Shah
22. SALIENT FEATURES Magnetic compacting is more user friendly & avoids Air suction Air pipes Perforated drums or apron Additional air conditioning requirements SoNuu Shah
23. Features breaks in weaving. Loom shed droppings and linting in knitting are reduced. Singeing can be omitted. Lower twist can be employed in doubling. Improved appearance and lustre of fabric with a softer. Reduced pilling and better dye uptake. SoNuu Shah
25. Vortex Spinning The vortex spinning technology is one of the most promising new inventions in the spinning market. This relatively new spinning system was also developed by the Japanese firm Murata (Muratec). Murata’s No. 851 Vortex Spinner made its first appearance at OTEMAS’97 [34]. Vortex spinning is a false twist process, and the twist insertion in this system is achieved by means of air jets. The main attraction of vortex spinning is that it is claimed to be capable of spinning 100% carded cotton fibers at very high speeds (400m/min), SoNuu Shah
26. Advantages Other claimed advantages of vortex spinning are a low maintenance cost due to fewer moving parts, elimination of the roving frame stage, and improved fully automatic piecing system. In addition to these, yarns produced by this method have low hairiness compared to normal ring yarns. This is claimed to be due to being “air-singed” and “air-combed,” which in turn results in reduced fabric pilling; and fabrics made from vortex yarns have outstanding abrasion resistance, moisture absorption, color-fastness and fast drying characteristics SoNuu Shah
28. Air-jet Spinning A spinning system in which yarn is made by wrapping fibres around a core stream of fibres using compressed air. SoNuu Shah
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31. Friction Spinning Friction Spinning is a textile technology that allows very heavy count yarns and technical core wrapped yarns to be manufactured. These are most commonly used in Mop yarns, flame retardants and high tech fancy yarns such as Raydon and Kevlar. SoNuu Shah
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33. Advantages of Friction Spinning The forming yarn rotates at high speed compare to other rotating elements. It can spin yarn at very high twist insertion rates (ie.3,00,000 twist/min). The yarn tension is practically independent of speed and hence very high production rates (up to 300 m/min) can be attainable. The yarns are bulkier than rotor yarns. The DREF II yarns are used in many applications. Blankets for the home application range, hotels and military uses etc. DREF fancy yarns used for the interior decoration, wall coverings, draperies and filler yarn SoNuu Shah
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35. Quality Comparison In the comparison of all the spinning techniques, we will also need to include the quality test for each type of the spinning technique yarn to check which one is providing best quality yarn…for this purpose we are going to need following machines: Uster tester HVI 1000 Lea Strength testing machine Quantum test Misc. SoNuu Shah
