In the weaving process, hairiness is one of the important indicators to measure yarn quality. A large number of domestic and foreign data and daily production practices show that the winding process is the process with the largest increase in yarn hairiness, and the key to controlling the hairiness is to avoid the hairiness generated by the spinning process from further deterioration in this process. We analyze the causes and influencing factors of hairiness around the winding process from the following aspects, and propose countermeasures to reduce hairiness:
1. The influence of winding process parameters
(1) Winding speed
With the increase of the speed of the winder, the yarn tension increases and the jump is serious. The collision and friction between the yarn and the winding parts increase, resulting in an increase in hairiness. Therefore, from the consideration of reducing winder hairiness, it should be
Choose a suitably low winding speed as much as possible. In addition, based on experience, when the winding speed increases to a certain level, the hairiness no longer increases, or slightly decreases. The analysis believes that this is related to the operation of the equipment.
Stability and dynamic balance are related to changes in speed. The stable operation of the equipment reduces the chance of collision between the yarn and the winding parts, and reduces friction, so that the hairiness shows a downward trend. Therefore, the winding speed should be selected according to the model after testing the best value.
(2) Yarn guide distance
The yarn guiding distance also has a certain effect on the yarn hairiness. The large yarn guiding distance causes the large inclination angle between the yarn and the bobbin when the yarn is unwound, which intensifies friction and increases hairiness. The yarn guide distance is small, the friction when the yarn is unwinding
Small rubbing force can reduce hairiness, but too small will affect the insertion and removal of the yarn tube.
(3) Winding tension
In the winding process, winding tension is an important parameter for controlling hairiness. Winding tension increases, the friction between the yarn and the machine parts increases, resulting in an increase in hairiness, which is in a positive phase with the number of hairiness on the winding yarn
turn off. If the winding tension is low, the hairiness produced by the yarn will be less. Therefore, under the condition of not affecting the normal operation of the winder, the winder tension should be appropriately reduced, which is beneficial to reduce the probability of yarn hairiness and maintain the yarn strength and elasticity.
2. The influence of winder components
(1) Balloon breaker
The installation of a balloon breaker on the winding machine plays an important role in reducing the hairiness of the winding process. It can effectively control the unwinding tension, reduce fluctuations, and weaken the yarn, winding parts and air.
Friction resistance, thereby reducing hairiness.
(2) Material of tank
The material of the grooved tube has a great influence on the hairiness of the yarn. The steel grooved tube winder produces the least hairiness, followed by the aluminum alloy grooved tube, and the bakelite grooved tube is the worst. The surface of the metal trough tube is specially treated to make it wear-resistant
Performance, shape retention, and thermal conductivity are better than bakelite troughs. When conditions permit, the use of steel troughs is a simple and effective technical measure to reduce the hairiness of the package.
3. Other influencing factors
(1) Workshop temperature and humidity
The temperature and humidity of the workshop also have a certain influence on the hairiness of the yarn. The mechanical properties of the yarn will change after moisture absorption, which will affect the yarn hairiness. The humidity is low, the static electricity phenomenon is serious, and the
Mutual repulsion, difficult to control and reduce hairiness; high humidity, yarn fibers are easy to entangle, affecting normal production. Maintaining a temperature of 29°C and a relative humidity of 55% can improve spinning performance.
(2) Production management
Operational management is the guarantee for reducing yarn hairiness in the winding process. The state of the winder equipment is the basis for controlling the hairiness reduction in this process. Therefore, production management should be strengthened to reduce yarn hairiness growth. First of all, we should systematically manage raw materials, processes, equipment, operation and other aspects, and standardize and implement basic management systems such as operation, inspection, and assessment; secondly, strictly implement technical standards and quality standards to ensure that process components meet requirements, do a good job of cleaning, and maintain The yarn channels and the parts in contact with the yarn are smooth and clean, thereby reducing yarn hairiness.
To sum up, in order to effectively control the increase in hairiness in the winding process, it is required to maintain good equipment conditions, set reasonable process parameters, ensure the maintenance and replacement cycle of spinning equipment, and use high-quality new equipment. Standardize the implementation of basic management systems such as operation, inspection, and assessment, strictly control the workshop environment, and ensure the efficient and continuous implementation of software and hardware, so that the hairiness of the winding process can be effectively controlled.
