Mebrahtom Teklehaimanot*, Kiday Fisseha and Lemlem Tikua
The project focuses on the study the impact of the roving strand surface contact on flyer top and the spacer size on yarn properties. For the study 100% cotton fiber which 0.7Ne roving and 23Ne yarn were used. The different flyer top (front flyer top, conventional back flyer top, and modified back flyer top) and the roving spacer sizes (spacer size 4mm, spacer size 5mm, and spacer size 6mm) were used to produce a rove (0.7Ne) that were processed in to yarn. The produced yarns are tested in Almeda Textile Company spinning laboratory for different parameters. The modification of the conventional back flyer top is achieved by equalizing the surface contact of the rove strand on the front and back flyer tops. From the analysis it is found that low surface contact of rove strand on flyer top (conventional back flyer top) and higher spacer size has a significant effect on rove evenness, yarn evenness, and yarn strength compared to the modified back flyer top and smaller spacer size. These yarn properties are improved by modifying the conventional back flyer top and by using the smaller spacer size. The modification of conventional back flyer top is not only used to improve the yarn property but also used to reduce the number of sensors (light barriers) which controls the rove ends down in the roving machine.
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