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Yarn making from staple fibers involves picking (opening, sorting, cleaning, blending), carding and combing (separating and aligning), drawing (re-blending), drafting (drawing into a long strand) and spinning (further drawing and twisting). Silk and synthetic filaments are produced by a less extensive procedure. Current high-production yarn-making operations are performed on integrated machines that perform this entire sequence as one combined operation.
Yarns are continuous strands of fibers that can be woven or knitted into fabrics. Natural staple fibers usually requires processes such as spinning to make yarns. Silk yarn, extracted from silk cocoon are continuous filament yarns. Most of the synthetic yarns also does not require the additional processes of spinning.
The new spinning systems clearly avoid the limitations produced by the twist insertion mechanism. It is possible to increase the twist insertion rate and the yarn production speed quite considerable. Various spinning techniques specifications.
Doubling reduces unevenness of single yarns and the strength of the doubled yarn is correspondingly better than the single yarns. In this article Ring Doubling, Two-For-One (TFO) twister, quality required by yarn to get best-doubled yarn are discussed.
Specifications of automatic cone winding, checking of reeling frequently, reeling doff weight, reeling calculations
Contains the process sequence of Finishing for yarn. It includes yarn twist setting, cone winding from ring cops to cone by cone winding , ordinary cone winding specifications, slub catcher settings , splicing, production calculation.
Factors governing Optimum Spinning condition, Yarn quality assessment, Causes of end breakage/ end down
In Lap-former machine, slivers are fed to form a lap of 20 inches wide condensed with a slight draft and weighing as per set length. The machine run smoothly so as not to disturb the fibres which undergo combing at the comber machines. One such Lap former is sufficient to feed 8 comber machines.
Objectives of speed frame, operations involved in speed frame
Necessity of combing, objectives of combing, Combers Noel