In daily production, package yarns mainly include loose yarn, overlapping yarn, frayed yarn, poor forming, unqualified joints, winding yarn, and flying yarn. defects and other quality issues. In response to these problems, corresponding measures should be taken to improve the quality of the package yarn.
1. Pine bark yarn
The performance of pine bark yarn on the package is that part of the yarn is not spun into the package according to the normal winding method. On the bobbin, it is much narrower than the width of the bobbin. The bobbin surface is not tightly wound, but relatively loose, and cannot be unwound normally during high-speed unwinding.
The reason for this phenomenon is that the yarn tension is too small, resulting in yarn The reasons for the thread tension being too small are as follows
First, there may be two reasons There are granular impurities or larger flying flowers between the tension bowls, causing the tension bowl to not rotate and the tension bowl to not work. The yarn tension is too small, causing the yarn detection rod to lift up the spinning yarn, resulting in loose yarn;
The second problem is that the yarn detection rod failed, and the smaller tension could not hold the yarn detection rod, causing the The yarn detection rod lifts the spinning yarn, causing loose yarn;
The third is tension When spinning yarn outside, the yarn does not pass through the normal channel and the tension is small, causing the yarn detecting rod to lift up the spinning yarn, resulting in loose yarn.
Take corresponding measures for the above causes of loose yarn: Tension bowl If there are impurities or flying flowers in between, clean up the impurities or flying flowers in time, strengthen the quality supervision of employees, and improve their sense of responsibility and quality awareness.
The security workers frequently inspected the yarn detector rod and found that the yarn detector rod failed. Stop containers for timely maintenance and create a good production environment for employees.
Reduce the number of tension-spinning yarns, and deal with loose bark yarn in time if it appears on the bobbin. Peel off that part of yarn to prevent the pine bark yarn from continuing to be wound on the bobbin, which will cause adverse effects to the enterprise.
2. Overlapping yarn
Overlapping yarn is caused by excessive beating of the trough drum, unstable rotation or failure of the intermittent device of the trough drum machine. of. Improper spindle angle can sometimes easily produce overlapping yarns. If this happens, the spindle must be repaired in time and the overlapping packages must be reversed.
3. Worn yarn
There are two situations of worn yarn, one is the surface of the package is worn, the other is the big end of the package There is a ring that is worn out.
The worn yarn on the surface of the package is due to the damage of the self-stop box, which causes the spindle to be unable to automatically lift off after the yarn is broken. The spindle often lifts up during spinning due to the high-speed running drum or the failure of the yarn detector rod. The turner on duty places a heavy object on the yarn detector rod, causing the spindle to fail to lift automatically after the yarn breaks, and the spindle cannot lift in time. It was found that the package yarn followed the groove drum rotation for a long time and the surface of the package was worn away.
In this case, the security guard should promptly repair the damaged self-stop box. If the rod fails, you should ask a maintenance worker to repair it. Do not handle it yourself.
The phenomenon of a circle of wear on the big end of the bobbin is caused by the loose core of the spindle, or the improper relative position between the groove barrel and the spindle. When you find this phenomenon, do not blindly use the grinding spindle, let it be repaired before use.
4. Poorly formed yarn
Poorly formed package yarn is due to the grooved tube There are yarn marks in the yarn guide groove or improper operation causes the yarn to wander.
For this kind of spindle, you need to find a security guard to grind the groove barrel and make it When cleaning, stop the trough tube before doing it to avoid damaging the trough tube and affecting the shape of the tube. For subs with pine cores, repair them promptly after discovery.
5. Unqualified joints
For unqualified joints, there are knots with wires, low knot strength, large knot hairiness, etc. phenomenon.
For the control of knot quality, the turners on duty should develop the ability to inspect knots. As a rule, bad joints cannot enter the inside of the tube.
Security personnel should check the splicing quality of the splicer every day to ensure the splicing The connector qualification rate of the device. It is easy for yarn to attach during the knotting process.
In this case, do not let the yarn on your hands return during the operation The yarn waste that floats out is too long to avoid being brought into the cotton yarn, causing the yarn to attach and affect the inherent quality of the package yarn.
6. Winding
The winding inside the bobbin is caused by improper operation by the turner. When driving again after parking, press the handle of the automatic parking box if the yarn cannot be pulled tightly. Coupled with the twist of the yarn, it is easy for the yarn to curl.
In response to this phenomenon, it is necessary to strengthen the training of duty lathes and improve their quality awareness and operation level, so that they can master the operation method proficiently and reduce the occurrence of winding.
7. Flying yarn defects
The flying yarn defects in the package yarn are caused by the flying yarn entering the package behind the electronic yarn clearer during the winding process. It may also be caused by the missed cutting of the electronic yarn clearer, which causes yarn defects in the spun yarn to enter the package yarn.
This kind of package yarn quality must be achieved by strengthening cleaning management, strengthening the cleaning around the spindle, and ensuring the blowing effect of the dust blower. Maintaining the yarn clearing effect of the electronic yarn clearer and reducing the number of missed cuts can effectively reduce flying yarn defects in the package.
Inherent quality improvement in package yarn is a long-term issue that requires all employees We work together to improve operational standards, enhance responsibility awareness, and allow employees to establish a quality awareness of quality first and customer first. All work focuses on product quality, and all work is done to improve product quality.
Managers at all levels should often tell employees about the significance of product quality to the enterprise.
Strengthen the operational guidance, supervision and inspection of employees, and guide them to master the operation methods proficiently , reduce the inherent quality of the package yarn and improve the overall quality level.
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