ANALYSIS OF HARDNESS VARIATIONS IN RADIAL AND LONGITUDINAL DIRECTION OF BOBBINS IN STEP PRECISION WINDING

Step precision winding is a widely used bobbin winding method in industry, especially for dyeing bobbins. It is important to adjust winding parameters in an optimum way to obtain optimum hardness variation and best dyeing performance. Main winding parameters are winding pressure, crossing angle and yarn tension. This paper presents a research investigating the effect of main winding parameters on hardness distribution in radial and longitudinal directions of bobbins wound with step precision winding. Bobbins are produced from Ne 30/1 and Ne 10/1 cotton yarns. Bobbin hardness is measured by a new instrument called UNITORQ, which enables the measurement of relative bobbin hardness in radial and longitudinal directions with small increments of distance. It is found that crossing angle affects mainly longitudinal hardness variation while radial hardness variation is determined and affected in a large variation interval by winding tension. Winding pressure is seen to have no significant effect on winding hardness distribution in both radial and longitudinal directions but it determines bobbin hardness level together with winding tension and crossing angle.

Keywords:

Winding density, winding hardness, hardness distribution step precision winding, winding parameters,

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Özdemir H. and Oğulata R.T., 2010, “Effect of selected parameters on color difference at dyeing of cotton packages wound from ring spun yarns”, Tekstil ve Konfeksiyon, Vol: 20(3), pp: 232-235.
Mattison V., Thesis details (The Effects Of Varying Density During Package Build To Optimize Levelness On Package Dyed Yarn)., Institute of Textile Technology, http://atandepc.com/projects/cestabProjectDetails.cfm?id=634&type=2. (2018, accessed 20 September 2018).
Yang Y. and Mattison V.L., 1997, “The effect of package density profile on levelness of package dyed yarn”, Textile Chemist & Colorist, Vol: 29(8), pp: 77-81.
Shaid A., Siddiquee A.B. and Rahman A., 2011, “Studies on reverse tension mechanism of cheese dyeing”, Daffodil International University Journal of Science and Technology, Vol: 6(2), pp: 42-52.
Hes L. Sensora, Principle and Applications of the Portable Textile Tester “UNITORQ” (Obtained by private communication).
Chemani B. and Halfaoui R., 2014, “Theoretical density study of winding yarns on spool”, International Scholarly and Scientific Research and Innovation, Vol: 8(10), pp: 1061-1064.
Eren R., Çelik Ö., Kesimci M.O. and Lubos H., “Effect of winding parameters on hardness variation in step precision winding. In: 15th AUTEX World Textile Conference, Bucharest, Romania, 10-12 June 2015, ID 37, p 48.

ISSN: 1300-3356
Yayın Aralığı: Yılda 4 Sayı
Yayıncı: Ege Üniversitesi Tekstil ve Konfeksiyon Araştırma & Uygulama Merkezi

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