GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/22

Question 22 (Textile Engineering & Fibre Science)

The bottom roller surface used for driving aprons in ringframe drafting system is

(B)Axially fluted
(C)Spirally fluted
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What is the function of drafting rollers?

Drafting rollers are an essential component in the process of spinning fibers into yarn in textile manufacturing. The function of drafting rollers is to draw out the fibers and elongate them while reducing their thickness to produce a uniform and consistent yarn.
Drafting rollers work by pulling the fibers through a series of pairs of rollers with different speeds and diameters. The first pair of rollers, called the front rollers or feed rollers, feed the fibers into the drafting zone, where they are stretched and thinned. The second pair of rollers, called the back rollers or delivery rollers, draw out the elongated fibers and twist them to form the yarn.
The speed and diameter of each pair of rollers are carefully calibrated to achieve the desired level of drafting and twist, depending on the type of fiber, yarn thickness, and other production factors. The drafting process allows for the creation of a yarn with a consistent thickness and strength, which can then be further processed into textiles or garments.
Overall, drafting rollers play a critical role in the spinning process, enabling the conversion of loose fibers into strong and consistent yarns, which form the foundation of many textile products.

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