Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (03): 77-81.doi: 10.13475/j.fzxb.20200705005

• Textile Engineering • Previous Articles     Next Articles

Analysis of back draft effect and yarn structure of Siro fancy yarn with special appearance structure

RUAN Li1, SUN Rongji1, LIU Jihong1, LI Yonggui2   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. Engineering Research Center of Textile and Clothing of Fujian Province University, Fuzhou, Fujian 350108, China
  • Received:2020-07-20 Revised:2020-12-04 Online:2021-03-15 Published:2021-03-17

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Abstract:

In order to develop a new type of fancy yarn, the grooved back-top roller was used on the spinning frame, and the force of the rear nip strand of fibers and yarn structure with the fancy rubber-covered roll were analyzed. Tested on the TH598J spinning frame, the mass distribution of the whiskers output from the middle roller after one rotation of the tuber roller was measured by the cut-off weighing method, and the mass distribution of the whiskers output from the normal rubber roller and the fancy yarn rubber roller was obtained respectively. The draft curve of the back zone of normal rubber roller and fancy yarn rubber roller is obtained respectively by the draft formula, at the same time the density of the formed yarn analyzed, so as to explore the change of the appearance structure of this fancy yarn. The results indicate that the grooved rubber roller gradually reduces the draft ratio of the rear zone from normal to 1 and then gradually increases to normal. The section of the strand of fibers passing through the groove affects the draft of the front and back sections of the strand of fibers. The draft ratio is reduced from normal, so that the yarn density also changes, and a new type of Siro fancy yarn with a special appearance structure is obtained.

Key words: rubber-covered roll, back draft, slipping draft, fancy yarn, Siro-spinning, spinning

CLC Number: 

  • TS104.7

Fig.1

Back-top roller for Siro new fancy yarn"

Fig.2

Force analysis under rear clamp"

Fig.3

Longitudinal of Siro new fancy yarn"

Tab.1

Spinning parameters"

工艺参数 设定值
总牵伸倍数 29
后区牵伸倍数 1.6
后区罗拉中心距/mm 60
前罗拉转速/(r·min-1) 130
钳口隔距/mm 3.5
后罗拉上胶辊直径/mm 30

Fig.4

Mass distribution of strand of fibers output from the middle roller"

Fig.5

Back drafting changes of new fancy yarn"

Fig.6

Longitudinal structure changes of new fancy yarn"

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