Working Principle and Characteristics of Rotor Spinning

 

Rotor spinning working principle

Rotor spinning is a new spinning methods, this spinning method belongs to the category of open-end spinning. Rotor spinning does not use spindles, mainly relying on opening roller, rotor, false twisting device and other components. The opening roller is used to grasp and opening the fibers fed by the feed roller, and the centrifugal force generated by its high-speed rotation can transport the fibers out. The rotor’s rotation speed is more than 10 times higher than the opening roller. According to the principle of fluid pressure, cotton fibers enter the rotor along with the air flow and form a fiber flow, and constantly flow along the inner wall of the rotor. At this time, insert a yarn from the draw-off tube into the rotor, the fibers on the rotor inner wall are drawn out and twisted by the rotor rotating, as if while feeding the fiber constantly, while twisting, so that the yarn is connected with the fiber of the rotor inner wall. The spinning yarn is drawn out and wound onto the yarn tube by the yarn drawing winding mechanism. Rotor spinning makes twisting and winding process separately, which can solve the contradiction between high speed and large winding. It can increase the output of yarn exponentially.

Materials used in rotor spinning

The rotor spinning machine suitable variety raw materials, such as:
Cotton
Cotton waste and noil
Recycled fibers
Short staple of wool, linen, and silk
Chemical fibers
Blends of cotton and man-made fibers
and so on.

Temperature and humidity requirement

Workshop temperature and humidity have a direct impact on production. Temperature and humidity should be adjusted according to the season and variety. In general, the workshop temperature is controlled at about 23 °C, and the relative humidity is about 60%. If the temperature of the workshop is too high (low relative humidity), the broken heads number increases, the yarn evenness and strength is low, and the formation is bad. If the temperature of the workshop is too low (high relative humidity): the broken heads number and thick knots increase, the yarn evenness and strength is low, and the formation is also bad.
Workshop temperature and humidity control range (for reference)
Winter season: Temperature ≥20℃, humidity：60%-70%；
Summer season: Temperature ≤30℃, humidity：60%-70%；
More details can be found here.

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