Question 06 (Textile Engineering & Fibre Science)
Consider the statement, ‘off-setting the front top drafting roller towards the front is beneficial in a ring spinning machine’. Which one of the following CANNOT be the reason for the same?
| (A) | It reduced the hairiness of yarn |
| (B) | It results in smooth running of top drafting roller |
| (C) | It reduced end breaks |
| (D) | It results in shorter spinning triangle |
[Show Answer]
A
Frequently Asked Questions | FAQs
What is drafting in ring spinning?
Drafting is an essential process in ring spinning, where the roving (a loose rope-like strand of fibers) is attenuated or stretched to create the desired level of twist and strength in the yarn. The process of drafting involves three rollers, which are arranged in a triangular formation and rotate at different speeds.
The first roller is called the back roller and feeds the roving into the drafting zone. The second roller is the front roller and rotates at a faster speed than the back roller, pulling the roving forward and stretching it out. The third roller is the bottom roller, which rotates at a slower speed than the front roller and helps to maintain tension on the roving.
As the roving is pulled through the drafting zone, it is attenuated to the desired thickness and twisted to create the yarn. The level of attenuation and twist can be adjusted by changing the speed of the front roller or the distance between the rollers.
Drafting is a critical process that determines the quality of the resulting yarn. If the yarn is under-drafted, it will be weak and uneven, while over-drafted yarn will be thin and prone to breakage. Proper drafting ensures that the yarn has the desired strength, evenness, and twist, making it suitable for use in a wide range of textile products.