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Carding consecutive draw

Carding consecutive draw

Posted by:Hongsheng  Time:2016/7/16 8:54:57

Carding area and is now drafting a continuous dual-zone drafting and drawing the gauge and the pressure is entirely due to the different draft allocation different.
1. carding roller gauge
Carding roller gap is restricted drafting forces, as well as the stability of motion of the fiber without damaging the fiber and other factors, but also due to the roller deformation under pressure, so that the actual deviation from the jaws touching money extended to both sides, so hold distance must be greater than the length of fiber quality. Continuous drawing, the latter due to a drafting zone shall feed several number of large and small draw ratio, drafting force is correspondingly greater than the previous draft zone. Front draft draft ratio maximum, in order to better control the motion of the fiber, under pressure enough, should adopt a small-gauge rolls after drawing area to prevent drawing of excessive force caused sliver in the latter nip slip, we should adopt the large roller gauge. So Laura is holding distance from front to back gradually enlarged. Dual-zone led Yang to take full advantage of the grip roller common Article shall, in the region from the grip generally equal to or slightly greater than the length of fiber quality. Before feeding area due to slightly more than the number of continuous fiber drawing, gripping from slightly larger than can be drawn continuously.
2. carding roller pressure
One pair of rollers based on practical experience and roller nip of sliver gripping force and drawing force analysis, pressure roller on a previous draft of the zone should be a little boy back. Dual-zone drafting equivalent to around two separate draft zone, and therefore its four pairs of pressure rollers on from front to back is "heavy, light, heavy, light" (see Table ← 4), but the continuous pull Yang intermediate two pairs of rollers is both a back roller front drafting zone, but also after a front roller drafting zone, the pressure should be, as the case may be. The second felt pressure roller biased towards some of them as well, in use, in order to reduce the under jaw sliver slipping.

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