Thesis Details

Thesis Title: The Effects of Using the Hollingsworth Lintmaster in the Production of Fine Count Open-End Cotton Yarn Produced at High Rotor Speeds
Thesis Author: Allen Smith
Abstract: With the latest increase in rotor speeds, the greatest opportunities for growth of rotor spinning are available in spinning fine counts. Although the current generation spinning frames are capable of speeds of up to 130,000 rpm, current production of fine yarn counts (28/1 Ne) has been limited to between 100,000 and 110,00 rpm for carded cotton. One of the factors that has prevented industry from spinning at higher speeds is the quality of the feed sliver, in particular trash content. The objective of this thesis was to determine the effects of the Hollingsworth Lintmaster, a recently developed cotton cleaning machine, used in two different cleaning configurations on sliver quality, and how that sliver quality translated into yarn quality and spinning performance for Ne 28/1, 100% cotton open-end yarns spun at rotor speeds of 105, 110, 115, and 120 thousand revolutions per minute. The first cleaning configuration employed the Lintmaster as the primary cleaning machine, whereas the second configuration utilized the Hollingsworth MasterClean as the primary cleaning machine followed by the Lintmaster. The Lintmaster removed less waste while achieving a card mat with 50% less trash than the control, which was the Hollingsworth Lintmaster. However, the card equalized the amount of trash in the card slivers, eliminating the benefit of improved cleaning efficiency. Yarn quality and spinning performance for the stock cleaned on the Lintmaster was similar to that of the control line.