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YARN TWISTING
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Abstract
The mechanism of twist insertion to the strand during ring spinning has been studied. The
twisting of the strand occurs not only due to the rotation of twisting elements, but also due
to the winding of yarn on the package. When the yarn is wound on a stationary cop by
gripping and winding the yarn by hand, for every coil of yarn wind one turn of twist to the
yarn is inserted. But the same yarn is over-end withdrawn from the cop, and all twists
inserted during winding are removed during unwinding. Over-end unwinding rotates the
yarn in the opposite direction. Since the yarn from the cop is over-end withdrawn during
winding, the spindle speed is taken for calculating the twist in the yarn, whereas the flyer
speed is taken for calculating twist in the roving due to the parallel unwinding of roving
during spinning.
Title: YARN TWISTING
Description:
Abstract
The mechanism of twist insertion to the strand during ring spinning has been studied.
The
twisting of the strand occurs not only due to the rotation of twisting elements, but also due
to the winding of yarn on the package.
When the yarn is wound on a stationary cop by
gripping and winding the yarn by hand, for every coil of yarn wind one turn of twist to the
yarn is inserted.
But the same yarn is over-end withdrawn from the cop, and all twists
inserted during winding are removed during unwinding.
Over-end unwinding rotates the
yarn in the opposite direction.
Since the yarn from the cop is over-end withdrawn during
winding, the spindle speed is taken for calculating the twist in the yarn, whereas the flyer
speed is taken for calculating twist in the roving due to the parallel unwinding of roving
during spinning.
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