To control the quality of low twist yarn, we must first work hard on the selection of raw materials. High-quality fiber raw materials are the basis for producing high-quality low twist yarn. Selecting raw materials with moderate fiber length, good strength and uniform fineness can help reduce the phenomenon of broken ends and weak twist during the spinning process.
In terms of spinning technology, it is necessary to optimize the combing and drafting process to ensure that the fibers are parallel and straight with good separation to reduce the entanglement and friction between fibers, thereby reducing the uneven twist rate. At the same time, the tension, twist and moisture regain of the roving should be reasonably controlled to maintain a good roving structure.
The use of new spinning equipment and technology is also the key to improving the quality of low twist yarn. For example, the use of low-hardness, high-elasticity untreated rubber rollers and internal and external patterned rubber rings can strengthen the effective grip and control of fiber movement, reduce slippage, and improve the quality of yarn.
It is also important to strengthen the management of spindles. Spindle discs of different diameters cannot be mixed, and the position of the spindle disc and the scale of the tension hammer must be consistent. At the same time, the operation status of the spindle should be checked regularly, and the tension of the spindle belt should be adjusted in time to avoid weak twist yarn caused by spindle belt slippage or insufficient tension.
During the twisting process, the twist should be reasonably controlled to avoid insufficient yarn strength and uneven twist caused by too low twist. At the same time, the maintenance and maintenance of the twisting machine should be strengthened to ensure the normal operation of the equipment.
The quality control system is also indispensable. A complete quality inspection and control system should be established to conduct regular inspection and evaluation of various indicators of low twist yarn. Once quality problems are found, timely measures should be taken to rectify and improve.
Finally, employee training and operating skills should be strengthened. The operating skills of employees for equipment and the degree of attention to quality directly affect the quality of low twist yarn. Therefore, employees should be trained and assessed regularly to improve their professional skills and quality awareness.
Controlling the quality of low twist yarn requires starting from multiple aspects such as raw material selection, spinning process, equipment technology, spindle management, twisting yarn processing, quality control system and employee training.
