The Effect of Drawing-Frame Variables on Cotton Fiber Hooks and Parallelization and Processing Performance

A study was made of the effect of the drawing frame variables, sliver weight, total draft and doublings, draft distribution, back roll setting and weighting, and top- bottom second roll spacing on fiber parallelization, fiber hooks, and processing per formance. Sliver weight had a significant effect on fiber hooks, fiber parallelization, and processing performance, whereas the other processing variables had little practical effect, even though the effects observed were in many instances statistically significant. Fiber hooks increased and fiber parallelization decreased as the sliver weight fed to drawing increased. This led to an increase in spinning end breakage. An increase in draft and doublings increased fiber parallelization, but decreased sliver uniformity. The increase in fiber parallelization overshadowed the decrease in sliver uniformity, resulting in a decrease in spinning end breakage. These findings demon strate the need for achieving fiber parallelization, as well as sliver uniformity measure ments, to develop processing organizations that will result in optimum processing per formance and improved quality control.