GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/46

Question 46 (Textile Engineering & Fibre Science)

In ring spinning, the tension in yarn is the maximum

(A)Between the lappet guide and front roller
(B)Where the balloon radius is the maximum
(C)In winding zone
(D)Just below the lappet guide
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Frequently Asked Questions | FAQs

What is the purpose of ring spinning?

Ring spinning is a method of spinning fibers into yarn, which is used to produce various textile products. The purpose of ring spinning is to convert loose fibers into a continuous strand of yarn that can be used in the manufacturing of fabrics, garments, and other textile products.
The key steps in ring spinning process include:
Drafting: In this step, the fibers are drawn and blended to create a thin web of fiber that is fed into the spinning machine.
Twisting: The drafted fibers are then twisted together to form a continuous strand of yarn. The amount of twist can be controlled to achieve the desired yarn properties, such as strength, elasticity, and texture.
Winding: The twisted yarn is wound onto a bobbin or a package in a process called winding. The winding process ensures that the yarn is evenly wound and ready for subsequent processes, such as plying, warping, or weaving.

The main purpose of ring spinning is to produce high-quality yarn with desired characteristics, such as strength, evenness, and twist level, that can be used in the production of various textile products. Ring spinning is widely used in the textile industry due to its versatility and ability to produce a wide range of yarn types, including cotton, polyester, wool, and many other natural and synthetic fibers. Ring-spun yarns are commonly used in garments, home textiles, and industrial textiles, and they can be further processed into fabrics using various techniques such as weaving, knitting, or other textile processes.

Where is the yarn tension maximum during spinning of a yarn on ring frame?

The tension in the yarn is typically maximum at the point where the yarn leaves the front roller of the ring frame during the spinning process. In a ring spinning machine, the yarn is drawn through the drafting system, twisted by the traveler that moves around the ring, and wound onto a bobbin or package. The drafting system consists of front rollers and back rollers, which are responsible for drafting or attenuating the fiber strand to create the desired yarn thickness.

The front rollers in the drafting system are responsible for pulling the fiber strand and creating tension in the yarn. As the drafted fiber strand passes through the front rollers, it undergoes attenuation or stretching, which increases the tension in the yarn. The tension is highest at the point where the yarn leaves the front roller and enters the twisting zone, which is where the traveler moves around the ring to impart twist to the yarn.

After the yarn passes through the twisting zone and is wound onto the bobbin or package, the tension in the yarn decreases as it is released from the front roller and the traveler. The tension in the yarn is carefully controlled during the spinning process to ensure that the yarn has the desired properties, such as evenness, strength, and twist level, which are critical for producing high-quality yarn for textile products.

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