Question

A defect "drag away" during working of the machine is observed in

• A. Ring frame
• B. Flyer frame
• C. TFO
• D. Doubler

Hint:

• "Drag away" refers to fibers failing to integrate properly into the yarn structure during spinning.
• This is a common issue in ring spinning} due to factors affecting fiber control at the front roller nip and in the spinning triangle.
• Results in increased yarn hairiness, potential neps, and end breaks.
• Caused by poor roving quality (short fibers), incorrect machine settings, or worn components.

Answer 1

The Correct Option is A

The defect "drag away" refers to fibers being improperly controlled and pulled out or splayed from the main strand of fibers during drafting or twisting, leading to excessive hairiness, weak spots, or end breaks.

• (a) Ring frame: In ring spinning, fibers emerge from the front drafting rollers and pass through the spinning triangle where twist is inserted. Poor fiber control in this zone, especially for short fibers or due to incorrect settings (roller pressure, apron settings, traveler issues, wide spinning triangle), can cause fibers to "drag away" from the twisting yarn. This is a known issue contributing to yarn hairiness and potential breaks.
• (b) Flyer frame (Roving frame): Similar drafting principles apply, but speeds and twists are much lower. While fiber control is important, "drag away" as a specific term is more commonly associated with the higher stresses and speeds of ring spinning.
• (c) TFO (Two-For-One Twister): This machine plies already spun yarns. There's no drafting of staple fibers. Defects are related to plying, not fiber drafting "drag away".
• (d) Doubler (Assembly Winder): This machine winds multiple yarns together in parallel without twist. No drafting.

The "drag away" defect related to loss of fiber control during yarn formation is most characteristic of the Ring frame, especially at the spinning triangle. \[ \boxed{\text{Ring frame}} \]