What is Ring spinning?
A process of spinning in which the yarn is twisted and drawn while passing through a small metal device travelling rapidly around a ring in the operation of winding the yarn onto a bobbin.
What is the Rotor spinning?
Rotor spinning (a type of open-end spinning), in which fibres are detached from the card sliver and twisted, within a rotor, as they are joined to the end of the yarn.
Air-jet spinning is a pneumatic method which consists of passing a drafted strand of fibres through one or two fluid nozzles located between the front roller of a drafting system and a take up a device. This process employs an air-jet to rotate the fibre strands and twist them into a yarn.
What is Friction spinning?
Friction spinning is an ‘open-end’ or a ‘core-type’ form of spinning (or both), in which the yarn formation takes place with the aid of frictional forces in the spinning zone. Friction- spun yarns are characterized by a distinct wrapper surface.
Characteristics of different spinning methods.
Spinning methods |
Actual twist –insertion rate per minute |
System limited by |
Delivery speed (m/min) | |
Twist-insertion rate |
Drafting & fibre transport speed | |||
Ring |
15,000 – 25, 000 |
Yes |
No |
20 – 30 |
Rotor |
80,000 – 150,000 |
Yes |
Partly |
100 – 300 |
Air-jet |
150,000 – 250,000 |
No |
Yes |
150 – 450 |
Friction |
200,000 – 300,000 |
No |
Yes |
150 – 400 |
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