| Popis: |
Currently, ring spinning has limitations of poor integration of fibers that protrude from yarn surface, which causes hairiness and irregularity. The aim of this research is to improve yarn quality by modification of bottom apron/nose bar with perforation and applying air-suction in a conventional Reiter G35 ring frame and spinning 29.52 Tex (20 Ne) and 14.76 Tex (40 Ne). To produce modified yarn 17 combinations of apron hole diameter, suction pressure, and widthwise hole distance was used. The ANOVA result shows that as suction pressure increases hairiness, tenacity, and thick place (+50%/km) were improved significantly for both counts. Based on the result suction pressure, apron hole diameter, and hole distance were optimized to 23.9 mbar, 1.58 mm and 10 mm respectively for 40 Ne and 25 mbar, 1.75 mm, and 11.6 mm respectively for 20 Ne. As compared with conventional hairiness, tenacity, thin place, and thick place of 40 Ne modified yarn were improved by 16.25%, 12.7%, 17.42%, and 14.62% respectively. Whereas hairiness, tenacity, and thick place of 20 Ne modified yarn were improved by 8.87%, 7.42%, and 18.2% respectively. Thus, the modified G35 method of yarn condensing has capability to be used as an alternative method of conventional spinning as it is capable of producing better quality yarn. |
