Improving inner quality of cylinder
The internal quality problems of the tube are mainly the defects of biting, braid and whitening, which are generally caused by hairiness entanglement, yarn retraction after breaking, twisting, repeated grasping of large suction nozzle, etc. The most fundamental reason is the large difference in twist and the poor stability of twist. In order to improve the inner quality of the cylinder, the following measures can be taken.
Reasonable selection of winding speed and tension. Dyed fibers are prone to generate static electricity in the production process. The higher winding speed, the greater static electricity, the more serious yarn strength, yarn evenness and other damage, yarn hairiness, hairiness entanglement, easy to form bites. In addition, winding tension is also a major factor affecting broken ends. Therefore, in actual production, winding speed and tension should be adjusted repeatedly to make it the best.
Stereotyping treatment. In order to reduce yarn bites and braids caused by weaving in the production process, the main purpose is to improve the stability of the yarn. Steaming heat setting and tube yarn placement for 20-24 hours can be adopted before winding. In order to stabilize the twist and reduce the shrinkage, different types of shaping are adopted to balance the fiber stress under unbalanced tension, so as to prevent the uneven twist and the interference of braid twist caused by yarn untwisting in winding. With the increase of yarn stabilization rate, the yarn bite and braid defects will disappear when the yarn is put into production.
