TX4014 Theory of Twisting Syllabus:
TX4014 Theory of Twisting Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVE
To enable the students to learn about the principle of twist insertion in different spinning systems
UNIT I FUNDAMENTALS OF TWISTING
Mechanics of imparting strength to a staple-fibre strand by twisting; meaning of twist multiplier and the basis of selection of required twist; principle of false twisting; fundamental requirements to create real twist in the strand.
UNIT II TWISTING IN RING SPINNING
Principle of twist insertion in ring spinning; limitations of ring twisting; mechanics of balloon formed during twisting, yarn tension; influence of twisting on spinning triangle size and the subsequent effect on yarn quality and spinning performance; design features of rings and travelers used for twisting different types of yams.
UNIT III TWISTING IN OPEN-END SPINNING
Principle of twist insertion in open-end spinning; application of this principle in rotor spinning and friction spinning machines; advantages of this method of twisting over ring twisting method; comparison of yam tension developed during twisting in these two machines.
UNIT IV TWISTING IN AIR-JET AND AIR-VORTEX SPINNING
Principle of twist formation in air-jet, air vortex spinning; the merits and demerits of these methods of twisting; factors influencing twist insertion
UNIT V OTHER TWISTING PRINCIPLES
Principle of two-for-one twisting; twisting of yarns in double-rove fed spinning machines; operating principle involved in the twisting of core spun yarns, wrap-spun yarns; self-twist spinning; electrostatic spinning
TOTAL 45 PERIODS
OUTCOMES
Upon completion of this course, the student shall able to understand
CO1: Fundamentals of twisting
CO2: Theory of twisting at ring frame
CO3: Twisting principle of open end spinning and application in rotor and friction spinning systems
CO4: Twisting in air-jet and air-vortex spinning
CO5: Principle and method of twisting in two for one twisting system and other spinning systems
REFERENCE:
1. Klein W., “The Rieter Manual of Spinning, Vol.1”, Rieter Machine Works Ltd., Winterthur, 2014, ISBN 10 3-9523173-1-4 / ISBN 13 978-3-9523173-1-0.
2. Stalder H., “The Rieter Manual of Spinning, Vol.6”, Rieter Machine Works Ltd., Winterthur, 2014, ISBN: 10 3-9523173-6-5 / ISBN: 13 978-3-9523173-6-5
3. De Barr A.E. and Catling H., The Principle and Theory of Ring Spinning, The Textile Institute, Manchester, 1965.
4. Usenko V., Processing of Man-made Fibres, Mir Publishers, Moscow, 1979.
5. Grosbe,G . andlype C. Yarn Production: Theoretical Aspects, The Textile Institute, Manchester, 1999.
6. Lord P.R., Yarn Production: Science, Technology and Economics, The Textile Institute, Manchester, 1999