Draw Frame
This is the machine on which drafting & doubling are carried out. Carded sliver is that they are not even (uniform) enough to produce to good quality yarns. Therefore, usually all the carded slivers are subjected to Doubling & Drafting on a machine called “Draw Frame”.
Doubling is the practice of feeding two or more strands to produce one Strand. To attenuate fiber laps to slivers, Drafting is carried out. Different methods are used to draft sliver or yarn. One method is called “Roller Drafting”. During drafting the number of fibers in the cross section of the sliver or lap is reduce.
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