Prepared by

Takbir Ahmed 29th Batch Dept. Of Textile EngineeringI Daffodil International University.

Hello Everyone

Friction Spinning

Friction Spinning

Friction (DREF) spinning system is an Open-end spinning system. 

It is known as DREF spinning system. The frictional forces in the spinning zone the yarn

formation takes place. External surface of two rotating rollers is used to twist

individual fibers. 

Schematic view of friction spinning

Principal of Friction Spinning

Fibers are delivered onto the drum surface, which transports and stacks the fibers to the fiber bundle rotating between two surfaces moving in opposite directions.

The fibers wrap around the bundle surface. wrapped fiber bundle (yarn tail) is tugged by the yarn

delivery roll. Therefore twists by fiber arrangement are generated. Due to separate yarn winding and method of twist

insertion, it has capability to go for high production rate. 

Yarn Formation

3 steps

Feeding of fibers Fibers integration Twist insertion.

Types of DREF Friction Spinning

DREF-1 DREF-2 DREF-3 DREF-5 DREF-2000 DREF-3000

DREF-2000 It is the latest development in friction spinning

demonstrated in ITMA 99. DREF-2000 employs a rotating carding drum for

opening the slivers into single fibers and a specially designed system being used for sliver retention.

The fibers stripped off from front the carding drum by centrifugal force and carried into the nip of the two perforated spinning drums.

The fibers are subsequently twisted by mechanical friction on the surface of the drums.

Drums are rotates in the same direction. 

DREF-2000

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