Quality control is an important aspect of improving pro […]
Quality control is an important aspect of improving product quality, and the idea of "quality first" must be implemented in all production operations. Actively preventing man-made yarn defects in the spinning process is one of the effective ways to ensure yarn quality.
Prevent man-made defects, and do five preventions
1. Anti-replacement roving defect
To improve the quality of wrapping, remove the flying flowers on the surface of the roving including the inclined surface. After wrapping, make sure that the roving is not on the end of the roving and the roving is not empty (especially the upper row).
2.Prevent joint defects
To improve the quality of joints, three checks must be done before jointing (check roving, check collector, check sliver). If you encounter white spots when connecting, pull it out and reconnect it. The fly yarn is not attached to the yarn sliver, and the same gear of the winding roller and the rubber roller should be interrupted and pulled. Oily hands without joints (such as upper spindle reel, wiping roller neck, twisting roller seat, peeling roller, wiping steel plate, sweeping, etc., wipe your hands clean).
3 Anti-coarse warp and thick weft yarn
Pull the empty spindle and set the roving tail to prevent double roving from feeding.
4.Anti-tight twist off weft yarn
It is strictly forbidden to operate with one hand and the yarn with the other hand.
5.Prevent cleaning defects
It must be handy and eye-sighted, and resolutely implement the cleaning operation method, and it is strictly forbidden to attach flying flowers to the yarn to cause yarn defects.