By Carl Lawrence
This e-book offers a useful unmarried resource of knowledge at the advances in yarn spinning applied sciences. complicated spinning platforms are defined and comparisons are made up of the homes of the yarns produced, and resultant comprehensive items, with these from traditional structures. half 1 offers an creation to yarn fiber spinning and constitution. Chapters talk about the foundations of ring spinning and open-end spinning of yarns. Yarn constitution and houses from various spinning thoughts and yarn structural necessities for knitted and woven materials also are tested. half 2 covers advances particularly yarn spinning applied sciences. subject matters diversity from siro spinning to compact spinning expertise and air-jet spinning. ultimate chapters discover how you can reduce fiber harm which could take place in the course of spinning and using spin finishes for textiles. With its unusual editor and array of foreign members, Advances in Yarn Spinning know-how is a vital textual content for spinners, yarn brands and upholstery manufacturers, in addition to researchers, technicians, engineers and technologists during this region of the fabric undefined.
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Extra info for Advances in Yarn Spinning Technology (Woodhead Publishing Series in Textiles)
For cotton, the number of fibres at the nip of the front rollers of the ring spinning machine is around 100 to 400 for the finest to the coarsest yarn respectively. These fibres on leaving the front roller nip are subjected to twisting in the downstream operation. 2 Insertion of twist Various mechanisms can be used to give one of two types of twist insertion into a fibre: real or true twist and false twist. © Woodhead Publishing Limited, 2010 44 Advances in yarn spinning technology Real twist The principles of inserting real twist into an assembly of fibres are illustrated in Fig.
E. method commercially, namely rotor spinning and friction spinning. Both use a rotating roller having angled points projecting from their peripheral surface to remove a small number of individual fibres at a time and transport them to a collecting surface holding the yarn tail. 16 depicts the essential features of the rotor spinning system, which are ∑ The feed roller and feed plate ∑ A saw-tooth or pin-covered roller called an opening roller ∑ A tapered tube termed the transport channel ∑ A shallow cup called a rotor (a groove is cut into the internal peripheral surface, termed the rotor groove) ∑ A flanged tube (called the doffing tube) which faces the rotor base, coaxial to the rotor spindle ∑ A pair of delivery rollers that feed the spun yarn to the winding unit.
The mule spinning process enabled large-scale manufacture of fine and coarse yarns, as a single operator could tend up to 1000 spindles. In the 1830s the ‘self-acting’ mule was developed. It was called ‘self-acting’ because it provided a mechanical means for automating the carriage movements (spindledrafting and winding), and synchronising them with the roving feed by the rollers. Mules, each with 1320 spindles, became widely used for spinning fine yarns from cotton and wool. The mule yarn was a fine, strong but soft yarn which could be used to produce all kinds of fabrics.