Optimization of Break Draft, Pin Spacer and Rubber Cots Hardness to Enhance the Quality of Ring Spun Yarn Using Factorial Design

摘要

The aim of the present work is to optimize thedrafting parameters for ring spinning by using fullfactorial (2 3 ) experimental design. Three draftingparameters of ring spinning each at two levels werechosen for this study. These technological parameterswere break draft, size of pin spacer and hardness ofrubber cots. It was found from statistical analysis thatpin spacer size has a significant effect on yarnunevenness (U %), imperfection index (IPI),hairiness (H) and yarn strength (CLSP) compared tothe other two chosen factors. These yarn qualityparameters were improved by increasing the spacersize. The increase in spacer size reduces the cohesiveforces among the fibers during drafting. The pinbetween the cradle and the top front roller transfer theindividual fibers from the drafted fiber assembly tothe spinning triangle without any stretching oraccumulation. This yields a more integrated structureand the quality of yarn is improved.