Reasons for the growth of hairiness in automatic winding machines. Since the speed of automatic winding machines is about 3 times higher than that of ordinary grooved drums, and there is a trend of improvement, the growth control of hairiness has naturally become a problem. An important issue for the rapid development of winding machines. Hairiness is a by-product of cotton fiber processing. It can only be reduced but cannot be eliminated. The general rule is that it is generated in the spun yarn and grows in the yarn. The growth rate is generally 3 to 5 times higher than that of the spun yarn. If it exceeds this critical value, the yarn quality will deteriorate. Even if the growth of spun yarn hairiness can be controlled in compact spinning, the growth in winding cannot be eliminated.
The main reason for the hairiness growth from spinning to winding is the change of hairiness in several directions between spinning and winding: such as the operation of the spindle during spinning The direction is clockwise; the running direction of the traveler is clockwise; because the speed of the traveler is lower than the speed of the spindle, the winding direction of the yarn is clockwise. The roller speed of the spun yarn is clockwise, the running direction of the rubber roller of the spun yarn is counterclockwise, and the movement direction of the output sliver when twisting is reverse from right to left. During the twisting and condensation process, the fiber is affected by the movement. , the influence of displacement deviation occurs, edge fibers and floating fibers appear, and hairiness occurs.
When the winding is unwinding, the winding direction of the winding is counterclockwise, the winding direction of the bobbin is clockwise, and the spun yarn bobbin is clockwise. The direction of winding and unwinding is reverse, and the strong friction when passing through the winding channel causes hairiness to grow. Controlling the hairiness growth of winding is essentially to reduce the changes in hairiness shape and direction caused by turning. By optimizing the winding speed and unwinding tension, optimizing the winding hardness, installing a balloon control ring, increasing the spinning stroke, strengthening basic equipment maintenance, and reducing the number of rewinds, the winding can be effectively reduced. The growth of hairiness achieves the purpose of improving yarn quality.
In addition, in order to reduce the hairiness growth of winding, the following points also need special attention:
(1) The smoothness of the yarn guide channel has a great influence on hairiness, especially if the channel tiles break, burr, fall off, and are lost more seriously, which will cause greater frictional resistance to the yarn sliver and generate a large amount of static electricity. The hairiness of the yarn will be significantly increased. Regularly check the integrity of the porcelain pieces. If there is any damage, replace it in time to ensure that the channel part is smooth and clean.
(2) The position between the large suction nozzle and the yarn package must be adjusted correctly. If the position is too far, the large suction nozzle cannot suck the yarn, affecting efficiency; If the position is too close, friction between the large suction nozzle and the package yarn is easy to occur, resulting in hairiness. The position between the large suction nozzle and the package yarn needs to be checked and adjusted regularly..
(3) The position of the spindle angle must be adjusted properly. Some individual spindle angles are found to be incorrect during production. This causes the balloon to be out of alignment during the untwisting process, resulting in uneven friction between the yarn and the balloon breaker, resulting in hairiness.
(4) The gears of the tension device are seriously worn, causing the tension disk to not rotate or rotate unevenly, causing scratches on the yarn, resulting in hairiness and recycled cotton. Knot. Any malfunctioning tension device needs to be repaired or replaced to ensure normal operation.
(5) Process parameters. The winding process parameters are closely related to the hairiness of the package yarn. Too high or too low speed, too high or too small tension can increase hairiness. Reasonably reducing the self-winding speed is an important measure to reduce hairiness.
The above is the editor’s answer to this question. I believe that many companies have different methods to solve the problem of winding hairiness growth. I hope everyone will read this article. Leave a message later, talk about your company’s solutions, and communicate with each other to help more people.
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