Question

Trash in the draw frame sliver as feed material is a very important parameter while processing in

• A. Friction spinner
• B. Rotor spinner
• C. Air Jet spinner
• D. Wrap spinner

Hint:

• Rotor spinning} is exceptionally sensitive to trash in the feed sliver.
• Trash particles and microdust accumulate in the rotor groove, causing operational problems (end breaks, deposits) and yarn defects.
• Extensive cleaning in blowroom and carding, followed by effective drafting at drawframe, is essential to prepare clean sliver for rotor spinning.
• Air Jet spinning also has high cleanliness requirements.

Answer 1

The Correct Option is B

Low trash content in the feed sliver is important for all modern high-speed spinning systems, but some are more sensitive than others.

• (a) Friction spinner (DREF): Can often handle lower quality input, including higher trash, especially for certain products like core yarns or coarse yarns.
• (b) Rotor spinner (Open-End): This system is highly sensitive to trash. Fibers are individualized and fed into a rapidly rotating rotor. Trash particles can accumulate in the rotor groove, leading to frequent yarn breaks, yarn faults (slubs, thick/thin places), and wear on the rotor. Extremely clean sliver is required for efficient rotor spinning.
• (c) Air Jet spinner (MJS, MVS): Also requires very clean sliver. Trash particles can clog the fine air nozzles or get incorporated into the yarn, causing defects and breaks.
• (d) Wrap spinner: Involves wrapping a filament around a staple fiber core. Trash in the staple core can affect wrapping and yarn quality.

While both Rotor and Air Jet spinning are very sensitive to trash, Rotor spinning is particularly notorious for problems caused by trash accumulation in the rotor. The mechanics of fiber collection and yarn formation within the small, high-speed rotor make it highly susceptible to disruptions by even small amounts of trash or dust. Therefore, minimizing trash in the draw frame sliver fed to rotor spinning is critical. \[ \boxed{\text{Rotor spinner}} \]