Warping ends are breaks in the yarn produced by the warping machine during normal winding. The indicator for assessing end breaks during warping is the “number of ends broken down per 100,000 meters”, which is the number of ends broken down within one million meters of a warp yarn. Due to different fabric structures, compared to when the package yarn is interrupted during the unwinding process on the warping machine When there are too many warping heads, it will not only affect the efficiency of the warping machine and increase the workload of the operator, but also increase cloth surface defects and have a negative impact on the fabric. As a spinning mill that sells yarn, it may lose orders because of this. It can be seen that the issue of warp breakage is very important. Common problems such as adhesion breakage, loop breakage, chaotic layer or yarn breakage, irregular breakage, etc. need to be addressed and corresponding measures taken.
01 Adhesive end breakage
The adhesion end breakage problem is an end breakage caused by the yarn getting entangled together during unwinding. Generally, It breaks when the diameter of the package yarn is relatively large. The reason is that the package yarn tension is too high and the package is wound too tightly. As for the large yarns in the package yarn, there are many sticking and breakage. Part of the reason is that as the diameter of the package yarn increases during the winding process, the weight of the package gradually increases. When the tension is constant, the heavier the package, the tighter the tension. Therefore, it can be understood as Larger yarns are wound more tightly than smaller yarns.
Solution: The graded tension can be turned on, so that the tension is tighter when the yarn is small and the tension is looser when the yarn is large, so that the yarn tension can be kept as consistent as possible, which can improve the problem of adhesion and end breakage. .
Another cause of adhesion is high hairiness. As we all know, the hairiness of the bobbin will increase a lot after the winding process, so the increase in hairiness during the winding process should be minimized. In terms of reducing hairiness, reducing the winding speed is the simplest, most convenient and effective method, but it affects the output; the second is to ensure smooth passage and reduce friction points. You can remove the pre-clearer and set the balloon breaker to In the open state, check whether each porcelain mouth at the friction point is damaged, etc.; in terms of process, the use of small tension process design can reduce hairiness. Of course, the root cause of high hairiness needs to be solved in the previous process, such as: unreasonable front-end process, raw material problems, etc.
02 Breaking off the ring
End breakage due to decoupling is caused by multiple yarns or multiple yarn strands being brought out by the high-speed unwinding yarn. The reason is that the package yarn tension is small and the package is wound too loosely. On the contrary to the reason of adhesion and breakage, please refer to the tension control method when adhesion and breakage.
03 Chaotic layer or yarn breakage
The phenomenon of random layering is that the yarn is not wound onto the yarn package according to the groove pattern of the grooved drum; and the phenomenon of yarn backing is that the yarn is attached to the yarn during the winding process. Generally, normal winding will not produce these two phenomena. After long-term observation, the cause is related to the large suction nozzle repeatedly sucking yarn and the negative pressure of the main suction motor. Secondly, the large suction nozzle hits the package yarn when sucking yarn. of chaos.
Solution:
① Adjust the distance between the large suction nozzle and the yarn package one by one, keeping a gap of 3mm to 5mm. ;
② Check whether a single spindle splicing fails or the yarn detection sensor fails, causing repeated splicing;
③ Check whether there is any The lathe operator directly presses the start button of a single spindle without handling the package yarn. Strengthen the training of the lathe operator;
④ Is the yarn clearing process setting too strict, resulting in frequent joints?
⑤ You can adjust the number of “window yarn search” in the “Cycle” menu from 3 times to 2 times, or even 1 time to reduce the number of repeated yarn suctions;
⑥ Reduce the speed of the suction motor at the front of the car to reduce the negative pressure of the yarn suction of the large suction nozzle;
⑦ Strengthen equipment management, personnel training and on-site management .
04 Irregular decapitation
①The twisting strength is low. Check whether the twisting configuration is reasonable and whether the twisting process achieves the best effect.
② End breakage caused by weakly twisted yarn, this phenomenon It is more common in thick varieties, that is, no twist is added during the twisting process of fine yarn, and the strength is also very low, so the yarn clearing process needs to be optimized.
③ Detailed end breakage, If the yarn clearer does not cut off small defective yarns, spun yarns and yarns with poor evenness, the strength will be low, which will cause warp breakage, and the yarn clearing process also needs to be optimized.
With the popularization of automatic winding machines, the proportion of automatic winding yarn output will become larger and larger. How to reduce warp breaks caused by poor automatic winding yarns? Head, is particularly important.
Go deep into the site, discover and solve problems, and strictly follow the operating methods for operation, cleaning and maintenance. Ensure that the equipment is in the best working condition. Only in this way can we use the advantages of the automatic winding machine to spin good products.</p
