After the increase (1) the number of carding carding number, since a corresponding increase in the amount of fiber fed drawing area, in the drafting process of friction between the fast and slow fibers also increases, the fiber helps to straighten and eliminate the hook. Again due to the improvement of the draft multiple carding total draft and the main drafting zone, so drafting force greatly improved, especially in the two carding an even process, for improving the extension of the fiber, reducing fiber the degree of consolidation is beneficial. When the carding machine uses eight feeding, using drawing about 8 times, and significantly improved fiber straightness, spun yarn quality indicators improved significantly, count irregularity is lower. So the carding machine are used 8 feed, totaling 64 merging is expedient. Of course, the quality requirements of the lower part of the low rent yarn, still using six feeds a total of 36 of the merging process configuration.
(2) and Article Rolla Rolla center distance from the center zoom, floating fiber increases, deterioration of fiber straightness.
When such a fiber length of 28.6 mm machining on a three looked on the draft form of the carding machine, the distance from the roller holding 35.7x22.2x42 mm to 32.4x18.3x39.7 mm, fiber straightness significantly increased , all sentences of sliver and yarn evenness significant improvement.
(3) Card draw ratio with increasing draw ratio and the reverse ratio of floating fiber downward trend, rising slightly positive, but the change is not large.
(4) Quantification of light can get a better straightness.
Carding process conditions the same as before and after the well strip, make appropriate changes in the strip and quantitatively.
(5) such as pressure rollers on a single apron roving machine, the total effective pressure roller pressurized from 32.6 kg to 40 kg, the roving fiber straightness factor will increase, reflected in terms of yarn evenness there was a marked improvement.
In the study of the role of technology and crude fiber straightness must be noted that the impact on the process of spinning fiber straightness. Practice has proved that, on spinning around Chennai region extending applications with smaller roller gap and more weight pressing means, in crude terms and with less number of channels as long as the process of feeding the front end product has a high degree of straight, also can meet and exceed the current level of general quality yarn spinning process. Such as the use of two down and strip, the reverse feed sliver sliver drawing large spinning spinning frame, the yarn quality indicators can meet and exceed the general level of quality draft spinning systems currently in practical applications due to cotton Article Backward difficult, and the use of three pieces, merging its number of 6x6x3 (three and strip machine sliver two output points per eye).
In summary, in the carding and spinning machinery use a small-gauge and heavy pressure conditions in the carding machine after use and close 108 times, fed directly into the large drawing spinning frame, or using two wells Article 8 feed, and close 64 times and a roving machine, fully able to meet the requirements of the fiber straight tribunal.