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Drafting wave in textile spinning
Drafting wave in textile spinning. Usually, the length of natural ash is never equal. Examining the slivers made of natural fibers, the presence of long ashes as well as small fibers was observed. Sliver drafting in the drafting zone causes problems with extra tiny fibers than the average length fiber. Usually, depending on the functional length of the fiber The roller setting of the drafting zone is done.
So when drafting with the presence of extra small fibers in the sliver, small fibers appear in the middle of the two pairs of rollers and create a kind of wave-like fold of ash, which is called drafting wave. Sometimes, in addition to the small fibers, the medium-length fibers are in a state of confusion between the carded slivers, which creates a drafting wave with the drawing sliver during drafting. The drafting wave makes the sliver irregular and causes problems in the subsequent process, which causes the yarn to drop in the spinning frame.
Drafting wave in textile spinning-The issues on which the drafting wave depends are given below:
1. Amount of feed sliver
2. Arrangement of different roller
3. Front wave draft
4. Short fiber presence
5. Fiber orientation in sliver
1. Drafting wave in textile spinning-Amount of feed sliver:
There is a limit on the amount of silver for the sliver process in a pair of rollers. Feeding an overweight sliver is likely to cause a drafting wave. By increasing the amount of sliver feeding, it is possible to reduce the amount of drafting wave by changing the setting of the roller in the drafting area, the pressure of the top roller, the speed of the roller
2. Arrangement of different roller:
Different roller setting is usually done depending on the working length of the fiber. The higher the speed of the drafting roller, the greater the vibration of the roller. If the diameter of the roller is less, the speed has to be increased to keep the surface fine, which will create a drafting wave. So the more you can increase the diameter of the roller out of the limitation, the less the drafting web will be.
3. Front wave draft:
If the front wave or tension draft is high, the presence of small fibers will create a drafting wave in the sliver. This is because the short fiber sliver tends to shrink a little after crossing the drafting zone. So the wave draft should be kept low when a short fibrous sliver is processed.
4. Short fiber presence in sliver:
The higher the number of small fibers in the sliver, the greater the drafting wave.
5. Fiber orientation in sliver:
The more straight and parallel the axles in the sliver during processing, the less drafting wave.
It is possible to reduce the drafting wave by doubling. The higher the doubling, the higher the fiber orientation and the lower the fold in the sliver.