Figure 3.8 Self-twist spinning . Wrap spinning Wrap spinning method consists in leading the fibers through the centre of a rotating hollow spindle. This rotation causes the yarn wound around the twistless core of drafted fibers whereas a driving and traverse drum wound the bundle onto a cone . Figure 3.9 Wrap spinning . Rotor spinning In this process the separated fibers fed into the rotor. It represents the twisting element into of which a length of yarn is introduced in the reverse direction and is made rotate about its own axis by the centrifugal force. Twist is transferred from the yarn to the fibers when they came in contact and the fibers attaches to the rotating end of the yarn when it is withdrawn from the centre of the rotor. In order to succeed in setting up a stable continuous spinning system, the fibers speed in the output is as high as their fed rate . Figure 3.10 Rotor spinning . Figure 3.11 Rotor spinning unit . Figure 3.12 Yarn formation in the . Friction spinning This method is similar to rotor spinning since the twisting element is common to both. In this case a pair of perforated rollers that rotate in the same direction insert twist. Fibers are sucked on their surface and rolled in their nip forming the yarn which is taken off and wound on to a bobbin . Figure . Friction spinning .
Figure 3.8 Self-twist spinning . Wrap spinning Wrap spinning method consists in leading the fibers through the centre of a rotating hollow spindle. This rotation causes the yarn wound around the twistless core of drafted fibers whereas a driving and traverse drum wound the bundle onto a cone . Figure 3.9 Wrap spinning . Rotor spinning In this process the separated fibers fed into the rotor. It represents the twisting element into of which a length of yarn is introduced in the reverse direction and is made rotate about its own axis by the centrifugal force. Twist is transferred from the yarn to the fibers when they came in contact and the fibers attaches to the rotating end of the yarn when it is withdrawn from the centre of the rotor. In order to succeed in setting up a stable continuous spinning system, the fibers speed in the output is as high as their fed rate . Figure 3.10 Rotor spinning . Figure 3.11 Rotor spinning unit . Figure 3.12 Yarn formation in the . Friction spinning This method is similar to rotor spinning since the twisting element is common to both. In this case a pair of perforated rollers that rotate in the same direction insert twist. Fibers are sucked on their surface and rolled in their nip forming the yarn which is taken off and wound on to a bobbin . Figure . Friction spinning .