False twisting by means of a friction disk unit is an efficient technology used worldwide to manufacture synthetic fiber yarns that are textured. This paper proposes a new theory to analyze the yam path and the friction force exerted on the running yarn over a single friction disk. We do not apply discrete methods, but treat the system in a continuous manner using three-dimensional vector analysis and differential geometry.
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References
1.
Du, G.W. , and Hearle, J.W., Mechanics of Friction Twisting, Part I: Yam Path, Tension, and Torque Generation in a Single Disk, Textile Res. J.61, 289 (1991).
2.
Du, G.W. , and Hearle, J.W., Mechanics of Friction Twisting, Part 2: Application of the Single Disc Model to a Triple-Stack Multi Disc Spindle , Textile Res. J.61, 347 (1991).
3.
Ernest Scragg & Sons Ltd., JP Publication No. S48-99431, Dec. 15, 1973.
4.
Morris, W.J. , and Denton, M.J., An Improved Method of Friction-Twisting in the False Twist Texturing Process, Part 1: The Development of an Improved Method, J. Textile Inst.66, 116 (1975).
5.
Morris, W.J. , and Denton, M.J., An Improved Method of Friction-Twisting in the False Twist Texturing Process, Part 2: Theoretical Relations Between Yarn and Processing Parameters in the Improved Friction Spindle, J. Textile Inst.66, 123 (1975).
6.
Shintaku, S. , Endo, T., Kinari , T., and Tamamura, R., Yam Path in Friction False Twisting, Part 1: Analysis of the Yarn Path and Tension on Twisting Disk (in Japanese), J. Textile Machin. Soc. Jpn . 52, T217 (1999).
7.
Thwaits, J.J. , TheMechanics of Friction-Twisting Reassessed, Part 1: The Yarn Path in a Disk Spindle, J. Textile Inst.75, 285 ( 1984 ).
8.
Thwaits, J.J. , TheMechanics of Friction-Twisting Reassessed, Part 2: Tension and Torque Generation in the Disk Spindle, J. Textile Inst.76, 157 (1985).
