Modern Spinning Technology — Summer 2018

Describe basic principle of yarn formation of DREF spinning with neat sketch.

Discuss advantages and disadvantages of friction spinning.

Explain why rotor spinning is suitable for only coarser counts.

State the advantages of rotor spinning.

Describe the features of modern rotor spinning machines.

With a neat sketch, describe the passage of material on vortex spinning.

Discuss the major limitations of air jet spinning.

With neat sketch describe the structure of yarn obtained by airjet spinning.

Compare airjet spinning and vortex spinning.

Describe Siro spinning with neat sketch.

State the advantages and disadvantages of Siro spinning.

Describe wrap spinning system with neat sketch.

State the advantages and disadvantages of wrap spinning.

Describe twistless spinning system working with temporary adhesion, with neat sketch.

Describe Rocos spinning system briefly with neat sketch.

Describe twistless spinning system working with permanent adhesion, with neat sketch.

Explain compact spinning briefly. Hence discuss the advantages of compact spun yarn over conventional yarn.