Sage Journals: Discover world-class research

Abstract

This paper discusses fiber motion during roller drafting of staple fiber strands and its influence on the drafting force and drafting wave formation. It is well known that the dynamic friction coefficient of fibers is generally lower than the static friction coefficient, and the difference contributes to the “stick-slip” motion of fibers which causes the drafting waves in roller drafting. In this study a high-frequency vibration is introduced as a strand is attenuated in order to reduce the binding forces among fibers. Such reduction in drafting force is expected to improve strand uniformity by reducing the drafting waves. A roller drafting device capable of monitoring the strand drafting force has been designed and constructed. The experiments show that when a roving strand is subjected to lateral vibration, the force required to stretch the strand is significantly reduced. Average drafting force decreases with the increase in magnitude of the imposed vibration in the on-line drafting test. This study may lead to more efficient drafting systems for staple fiber processing.

Keywords

yarn spinning roller drafting drawing drafting waves drafting force

Get full access to this article

View all access options for this article.

References

Taylor, R.A. , and Graham, J.S. , The Influence of Front-Roll Coverings on the Spinning Strength of Cotton, Textile Res. J., 49, 717-723 (1979).

Plonsker, H.R. , and Backer, S. , Dynamics of roller drafting. I. Drafting Force Measurement. Textile Res. J., 37(8), 673- 687 (1967).

Plonsker, H.R. , and Backer, S. , Dynamics of roller drafting. II. Role of fiber crimp in the tensile behavior of slivers at low drafts or strains. Textile Res. J., 39(9), 823-830 ( 1969).

Sharieff, I. , and Vinzanekar, S.G. , Spectral Analysis of Yarn Irregularity and Its Relationship to Other Yarn Characteristics, Textile Res. J., 53, 606-614 (1983).

Olsen, J.S. , Measurement of Sliver Drafting Forces, Textile Res. J., 44, 852-855 (1974).

Korkmaz, Y.A. , and Behery, H. , Relationship between fiber fineness, break draft, and drafting force in roller drafting, Textile Res. J., 74 (5), 405-408, 2004.

Dogu, I. , A study of the Theory of Drafting Force in a Roller-Drafting Process, Textile Res. J., 41, 534-545 (1971).

Johnson, N.A.G. , A computer simulation of drafting, J. Textile Inst., (2), 72, 69-79 ( 1981).

Langston, J.H. , and Rainey, Jr., W.T. , A Literature Survey on Fiber Friction, Textile Res. J., 24, 643-653 ( 1954).

10.

Briscoe, B.J. , and Motamedi, F. , Role of Interfacial Friction and Lubrication in Yarn and Fabric Mechanics, Textile Res. J., 60, 697-708 (1990).

11.

Murayama, T. , Dynamic Measurement of Interfilament Friction on Staple Yarns, J. Appl. Polymer Sci., 24, 1413-1417 ( 1979).

12.

Klein, K. , "Manual of Textile Technology, Short-staple Spinning Series I, Volume 1, The Technology of Short-Staple Spinning," 2nd edn, Alden Press, Oxford, UK, 1998, pp. 25-29.

13.

McCreight, D.J. , Feil, R.W. , Booterbaugh, J.H. , and Backe, E.E. , "Short Staple Yarn Manufacturing," Carolina Academic Press, Durham, North Carolina, 1997 .

14.

Martindale, J.G. , Cotton Sliver on Roving: Measurement of Drafting Force, J. Textile Inst., 38, T151-T166 (1947).

15.

Smith, R.A. , Fiber Drafting Analyzer, US Patent 3,005,340 (1957).

Effect of High-frequency Vibration on the Drawing Behavior of Staple Fiber Strands

Abstract

Keywords

Get full access to this article

References