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Model of the Yarn Twist Propagation in Compact Spinning with a Pneumatic Groove

Research and development

Authors:

• Zou ZhuanYong
  College of Textiles & Fashion, Shaoxing University, Shaoxing, P. R. China
• Zou ZhuanYong
  Key Lab of Textile Science & Technology, Ministry of Edycation, Dong Hua University, Shanghai, P. R. China
• Guo YuFeng
  Anhui Entry-Exit Inspection and Quarantine Bureau, Technical Center, Hefei, P. R. China
• Zheng ShaoMing
  Key Laboratory of Clothing, Design & Technology, Ministry of Education, Dong Hua University, Shanghai, P. R. China
• Cheng Long-Di
  Key Lab of Textile Science & Technology, Ministry of Edycation, Dong Hua University, Shanghai, P. R. China
• Liu ShiRui (j/w)

Full text

Abstract: Compact spinning with a pneumatic groove utilises the transverse air force and mechanical force of the pneumatic groove to condense the fibre bundle in order to eliminate the spinning triangle. This paper analyses the twist resistance moments and torsion moment in the process of twist propagation. Results from this research confirm that the twist propagation is affected by the spinning tension, the negative pressure in the air suction pipe, the related yarn properties (the yarn diameter, yarn twist, and the torsion rigidity of the yarn), and the related structure parameters of the pneumatic groove roller (the friction coefficient between the pneumatic groove and the fibre bundle, the number of round pores, the diameter of the round pore, the distribution rule of round pores in the condensing zone). The twist propagation model determines the critical condition of spinning a compact yarn, characterised by the critical mean pressure (i.e. corresponding to the critical negative pressure in the air suction pipe). The higher the yarn twist, the higher the torsion rigidity of the yarn, and the lower the spinning tension required, the higher the critical mean pressure.

Tags: compact spinning, twist propagation, twist resistance moment, torsion moment, yarn formation.

Citation: Zou Z.Y., Guo Y.F., Zheng S.M., Cheng L.D., Liu S.R.; Model of the Yarn Twist Propagation in Compact Spinning with a Pneumatic Groove. FIBRES & TEXTILES in Eastern Europe 2011, Vol. 19, No. 1 (84) pp. 30-33.

Published in issue no 1 (84) / 2011, pages 30–33.