How to choose the twist of the roving?
(5)? Spinning ratio is small, the disappointment coefficient should be small, otherwise should be large. (6) Spinning yarn twist coefficient should be appropriate (4)? Workshop temperature and humidity, twist factor should be large, (7) spinning knitting yarn, the twist factor should be too large to master, to reduce the shadows shadows; woven yarn twist coefficient should be small to master.
Fiber length is long, the length of uniformity is good, the linear density is low, the twist factor should be small, otherwise should be large. (2)? Roving, yarn roller pressure heavier, twist coefficient should be large, otherwise should be small. Roving quantitative weight, twist factor should be small, otherwise should be large.
Roving twist factor is too small, easy to produce accidental drawing, increase the broken, so that the product is not uniform.Therefore, the roving twist coefficient is the same as the drafting factor, roller pressure, roller gauge, etc. The roving twist factor is mainly based on The length of the fiber, the spinning varieties, the thickness of the roving, the post-spinning process and the temperature and humidity factors to choose to control:
Roving with large twist, must be appropriate to enlarge the spine after the interval, the appropriate increase in roller pressure, so as not to stretch the spinning frame due to increased drawing force and roller slip, a hard head.
The roving strength increases with the increase of the roving coefficient, and the roving twist factor is increased to reduce the production efficiency of the roving machine, but it can increase the strength of the roving, reduce the roving elongation and improve the quality of the roving.
