Steel rings and travelers are important twisting and winding components of the spinning machine. The steel ring serves as the revolving track of the traveler. Whether the two cooperate well or not often becomes the main problem in the high-speed spinning machine and the increase in package size. Although the traveler is small, it plays a great role. It is one of the indispensable spinning equipment for completing the twisting and winding of fine yarn. By selecting a traveler with appropriate geometry and number (quality) to control and stabilize the spinning tension, you can achieve good winding formation, reduce yarn breakage and hairiness, and improve production efficiency.
Precautions for using steel ring travelers
First of all, according to the The performance, shape and old and new condition of the steel ring, combined with the spinning number and process conditions, select the shape and number of the traveler. Generally, the new steel ring uses a traveler with a higher center of mass and lighter weight, and then gradually increases the weight. Imported travelers can be used with domestic steel rings, but domestic travelers should try to avoid matching with imported steel rings.
Secondly, when trying to spin new varieties, in order to prevent high breakage and quality fluctuations caused by improper selection of travellers, a small number of spindles can be used for trial spinning, and then expanded to be used on the entire car. .
Finally, there should be dedicated personnel to strengthen the patrol inspection on the vehicle, and achieve “three looks”, “two tests”, “one listen” and “five points”.
Third look: First look at the shape and stability of the wire ring. The balloon is required to have small changes and good stability. When forming the bottom, the balloon should be prevented from touching the gauze plate. The balloon is elastic when the yarn is wound around a small diameter. Second, check whether the yarn channel is smooth. It is required that there should be an appropriate distance between the actual yarn channel and the friction position of the traveler. The yarn should have fewer ends at the traveler, and the fibers at the ends should not be flush, that is, there should be no cutting phenomenon. Third, check the wear condition of the wire ring, observe the wear degree and tempering color of the wire ring.
Second test: The first test is to test the strength of the joint, which requires elasticity in the hand, easy jointing, and no inability to pull or repeated jointing. Second test: Doffing yarn breakage distribution. Under normal mechanical conditions, the general breakage pattern is that small yarns account for 50%, medium yarns account for 20%, and large yarns account for 30%.
First listen: After listening to the feedback from the gear lathes, when there are speed changes, replacement of ring travelers or different batch numbers, pay attention to the spinning situation and deal with it at any time.
Five points: the broken ends of large yarns are high, and the wire rings are lighter; yarns of the same number and fast machines are used, and the wire rings are lighter; polyester and cotton varieties of yarns of the same number are On the machine, the wire ring is a little heavier; the knitting yarn of the same number is heavier than the woven yarn wire ring.
Principles of Traveler Selection
1) The finer the spinning number, the lighter the traveler mass.
2) The quality of raw cotton is good, so the choice of wire rings can be a little more focused.
3) The spindle speed is fast and the diameter of the steel ring is large, so the traveler should be lighter.
4) When the new steel ring is in the mature stage, the traveler should be lighter (1 size lighter than normal spinning) and replaced after 2 hours of spinning (interval Replace once every 8 hours), replace the normally used traveler after 24 hours of operation and start spinning for normal production.
Use steel ring travelers well to improve the production efficiency of the spinning frame
At present, spinning machines are gradually developing from short cars to long cars, and the spindle speed is developing from below 16kr/min to 20kr/min. The spindles adopt variable frequency start and segmented control, and electronic cams are used for forming. Install balloon rings, etc. Therefore, the use of steel ring travelers must also adapt to the spinning tension control requirements of the new spinning machine.
The new steel ring must be correctly run-in when it is put on the machine
The running-in of new steel rings is similar to the running-in of new spindles. It is called the “running-in period” abroad. The running-in of Noviba polished spindles requires that the spindle speed should be reduced to 24 hours after the first start. 80%, and perform the first oil change, the speed is increased by 1 kr/min every 24 hours, the second oil change is performed after 15 days, and another oil change is required after 2 months. Similarly, when new steel rings (except high-end steel rings) are put on the train, the speed must be slowed down to 80% to 85%, and then gradually accelerated, ranging from one week to more than half a month. This will ensure stable end-breaking and extend the production time in the future. The service life is guaranteed. Rieter’s various models of spinning machines are equipped with running-in period programs, which can be executed according to the running-in period program.
The service life of steel rings and travelers must be strengthened throughout the entire process management
Establish a time card for the use of ring travelers on the train, and reasonably select the ring diameter, traveler quality and ring shape according to the spinning number. The quality of the spinning frame traveler with a balloon ring should be 3 to 4 sizes lighter, otherwise it will increase the number of breakages due to excessive tension. When a new ring is put on the machine or the diameter of the ring is increased, the mass of the traveler should be reduced by 1 to 2 sizes. Before normal use of new varieties or new steel rings and new travellers, the process engineer must organize relevant workshop personnel to try spinning on the machine. During the trial spinning, observation and judgment should be made from the following aspects: the stability and consistency of the balloon should be good; It should be fresh and the air ring should be elastic; the maturation period is short, there are less flying circles, less broken ends, and less hairiness; the service life is up to standard (more than 15 days); the loss rate is small; the wire ring is not allowed to have flowers or hanging flowers. After the trial spinning is completed, a trial spinning report needs to be written and submitted to the chief engineer for review and confirmation.
The reasonable matching of the steel ring and the traveler not only affects the quality of the yarn, but also affects the life and production efficiency of the spun yarn. On the premise of ensuring the stability of life, it should be based on different requirements. According to market demand and product performance, high-quality steel rings and travelers should be selected rationally. </p
