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

Yıl 2019, Cilt: 29 Sayı: 1, 30 - 38, 26.03.2019

Özge Çelik Recep Eren

https://doi.org/10.32710/tekstilvekonfeksiyon.464713

Öz

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.

Anahtar Kelimeler

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

Kaynakça

• 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.
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• Hes L. Sensora, Principle and Applications of the Portable Textile Tester “UNITORQ” (Obtained by private communication).
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