Thesis Details

Thesis Title: Reduction of Frictional Forces at Weaving Using Low-Friction Coatings on Weaving Components
Thesis Author: William Harton Jr.
Abstract: Before most types of yam can be woven into fabric, it must first be coated with a protective chemical known as size. The sizing process adds an estimated $0.1464 to the cost of the final product. Once size is applied to the yam, it must then be removed from the fabric prior to dyeing and finishing. The high cost associated with the application and removal of size makes the process a target for cost reduction. However, the sizing of yam is necessary in order for the yam to withstand the harsh forces of the weaving process. Of all the components that contact the yam during weaving, the heddle has been shown to be the most damaging to the yam. The purpose of this research was to determine the appropriate low-friction coating to apply to each heddle to minimize the abrasion of the yam by the heddle. Once the abrasive forces on the yam were reduced, the amount of size used to protect the yam could also be reduced, lowering the cost associated with the sIzmg process. The Reutlinger Webtester was used to determine the appropriate heddle coating. Three sets of the friction posts used by this equipment to abrade the yam were coated with three different coatings in order to determine which coating would abrade the yam the least. These coatings included a thermally-sprayed alumina coating, a titanium nitride coating, and a diamond-like carbon coating. The single best coating selected from this trial was used to coat an entire set ofheddles and a full-scale weaving trial was conducted to determine if coating the heddles would significantly lower machine stop levels.