In daily production, package yarns mainly have quality problems such as loose yarns, overlapping yarns, frayed yarns, poor forming, unqualified splices, winding yarns, flying yarn defects, etc. In response to these problems, corresponding measures should be taken to improve the quality of the package yarn.
1. Songpi yarn
The performance of pine bark yarn on the bobbin is that part of the yarn is not spun onto the bobbin according to the normal winding method, but is much narrower than the width of the bobbin. The surface of the bobbin 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, and the reasons for the yarn tension being too small are as follows:
First, there may be granular impurities or larger flying flowers between the two tension bowls, causing the tension bowl to not rotate, the tension bowl to not work, and the yarn tension is too small, causing the yarn detector rod to lift up for spinning. , causing pine bark yarn;
The second is that the yarn detector rod fails. The smaller tension cannot hold the yarn detector rod, causing the yarn detector rod to lift up for spinning, causing pine bark yarn. ;
The third is spinning outside the tension. The yarn does not pass through the normal channel and the tension is small, which causes the yarn detector rod to lift up and spin, resulting in loose yarn.
Take corresponding measures for the above causes of pine bark yarn: if there are impurities or flying flowers between the tension bowls, clean up the impurities or flying flowers in time to strengthen the quality of employees Supervise and improve their sense of responsibility and quality awareness.
The security workers frequently inspect the yarn detector rods, and repair the automatic stop box if the yarn detector rods are malfunctioning in a timely manner, creating a good production environment for employees.
Reduce the number of times of tension-free spinning. If pine bark yarn appears on the bobbin, deal with it promptly and peel off that part of the yarn to prevent the pine bark yarn from continuing to be wound on the bobbin, which will provide good benefits for the enterprise. cause adverse effects.
2. Overlapping yarns
Overlapping yarns are due to drum beat Too large, unstable rotation or failure of the intermittent device of the drum machine. 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. Frayed yarn
Frayed yarn is divided into two parts There are two situations: one is that the surface of the bobbin is worn, and the other is that there is a circle of wear on the big end of the bobbin.
The worn yarn on the package surface is caused by the damage of the automatic stop box, which causes the spindle to be unable to automatically lift away from the high-speed running drum after the yarn is broken, or the yarn detecting rod The malfunction caused the spindle to often lift on its own during spinning. The turner on duty put a heavy object on the yarn detection rod, causing the spindle to fail to lift automatically after the yarn was broken, and it could not be discovered in time. The package yarn followed the groove drum rotation for a long time and the package was removed. Surface worn.
In this case, the security worker should promptly repair the damaged self-stop box. If the duty lathe finds that the yarn detection rod of the self-stop box is malfunctioning, he should ask the security worker for repair and do not handle it by himself.
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 The yarn is deflected due to yarn marks in the yarn guide groove of the drum or improper operation.
For this kind of spindle, it is necessary to find a security guard to grind the groove barrel. When cleaning, the groove barrel should be stopped before cleaning, so as not to damage the groove barrel and affect the barrel. take shape. For subs with pine cores, repair them promptly after discovery.
5. Unqualified joints
For unqualified joints, There are several phenomena such as knots with silk threads, low knot strength, and large knot hairiness.
For the control of knot quality, the turners on duty should develop the habit of checking knots, and bad joints cannot enter the inside of the bobbin.
Security personnel should check the splicing quality of the splicer every day to ensure the splicer’s joint qualification rate. It is easy for yarn to attach during the knotting process.
In this case, during the operation, do not let the yarn waste on your hands float out too long, so as not to bring in the cotton yarn, causing the yarn to attach and affect the yarn. The inherent quality of the package yarn.
6. Winding
The winding inside the bobbin is due to Caused by improper operation by the duty lathe. 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 on-duty lathes, improve their quality awareness and operation level, make them proficient in operating methods, and reduce the occurrence of coiling.
7. Flying yarn defects
Flying yarn in package yarn Defects are caused by flying flowers entering the package yarn behind the electronic yarn clearer during the winding process. It is also possible that yarn defects formed in the spun yarn enter the package yarn due to missed cuts of the electronic yarn clearer.
The quality of this kind of package yarn 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 the joint efforts of all employees to improve operational levels, enhance awareness of responsibility, and allow employees to establish quality first and customer satisfaction.With the above-mentioned quality awareness, all work is focused 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, guide them to master the operation methods proficiently, reduce the inherent quality of the package yarn, and improve the overall quality level. </p
