An Investigation of Assembly Size ofMaterial Fed and Its Influence on Quality of Drawframe Sliver
Investigation was carried out in respect toassembly size of material fed and its influence on quality of drawframe sliver.The assembly size of material was changed by changing width of the assemblyclamp. This newly designed clamp was located just prior to back-bottom draftingroller in the drawframe. The significant difference in U% and degree of fiberorientation was noticed in the drawframe sliver with respect to difference inassembly size. The change in assembly size leads to change in density of amaterial fed. Hence the drafting force required to achieve the expected drawingoperations were changes. Therefore apart from the unevenness of the sliver, thecohesive force, fiber orientation index and packing density of sliver is alsoconsidered as most important qualities which depend on assembly size ofmaterial fed. Therefore, the measurement of cohesive force, degree of fiberorientation and packing density is also carried out. With regard todetermination of packing density of sliver, developed practical method mayhelps to understanding the fiber distribution and presence of air gaps in thesliver. Based on the sliver breakage study in the drawframe, concluded that thefiber orientation in the drawframe sliver doesnt influence the performance ofdrawframe process. The measurement of sliver cohesive force gives insight toselect the appropriate draft distribution in the drawframe drafting system.
Key words: Lindsley Technique, Sliver cohesion, Packingfraction, Density of material fed
Authorsare associated with Department of Textile Technology, Anna University, Chennai.
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