Quality control points of roving process:
(1) In strict accordance with the cleaning cycle, do a good job in cleaning the drafting, winding parts, before and after the machine, to prevent flying flowers from adhering to produce yarn defects and increase end breakage.
(2) It is not allowed that the upper and lower cleaning pile sleeve does not rotate and the leather roller is damaged. If any problem is found, it should be fed back to the machine maintenance and special parts personnel for maintenance and replacement at any time. It is not allowed to operate with defects.
(3) The number of crimping and winding of the whole roving frame must be consistent, and the coexistence of more and less crimping is not allowed. Otherwise, the roving tension difference will be large, the driving will be difficult, and the roving elongation will be large, which will lead to long, thick, long and fine defects in the finished yarn, especially in knitting yarn.
(4) The twining and hanging flowers in the palm pressing and false twister should be removed in time to reduce accidental elongation.
(5) The sliver is led out from the sliver barrel and fed into the drafting area through the sliver fork. It should be kept in a straight line and no cross and friction is allowed.
(6) It is not allowed to wrap the yarn with roller or leather roller, especially the second roller or leather roller will cause a large number of continuous slubs, which will directly cause the slubs more than 2 meters and endanger the yarn and fabric quality.
(7) It is suggested to adopt the method of no joint operation before and after the machine, so as to reduce man-made defects and lay a good foundation for the production of fine yarn.
