Thesis Details

Thesis Title: A method to determine quantitative measure of opening room mixing machinery capabilities
Thesis Author: Gabriel Brown
Abstract: The ultimate goal of the opening room is to produce the intermediate fiber assemblies that can be further processed into yarns of superior quality with all manufacturing processes performing at maximum potential efficiencies. This task is accomplished in the opening room by pulling fiber tufts from the bale, opening and cleaning the tufts, and mixing the fibers together. Blend factor can be used to evaluate the effectiveness of the mixers in the opening line. Blend factor is the theory of assigning numbers, called mixing power, to different machines to recognize mixing capability. Blend factor numbers for cell mixers in an opening room are based on the number of cells in the machine. However, blend factors that are assigned to other mixing machinery are based on assumptions of how well the machine will mix fiber. This means there is no science as yet involved in the assignment of blend factor to these machines. Further study into blend factor and its relationship to reducing micronaire variability within the fiber mix was necessary to better understand the scientific relationship between known blend factor and the reduction of micronaire variability within the fiber mix. This research determined the degree to which micronaire variability within the fiber mix is reduced by selected mixing machinery in the opening room. It was discovered that generally the majority of the variability was removed with the use of a topfeeder and only one additional mixing machine. This research discovered that cell mixers were capable of much higher levels of micronaire variability reduction than originally estimated.