How to reduce winding yarn back?
Many people have misunderstandings or do not understand “How to reduce winding yarn rewind?“. Next, let the editor take everyone together to share with friends and explore about “How to reduce winding yarn?” Reduce winding yarn waste?” knowledge…
In the spinning process, we often encounter a troublesome problem – yarn waste in the winding. These yarn wastes cause breakage of the spinning yarn during the warping process, seriously affecting the warping efficiency. . What are the causes of silk back? How to reduce silk waste? Let’s hear what good suggestions netizens have.
Cause
Because the large suction nozzle sucks the yarn into chaos and forms yarn waste. During warping and unwinding, the entangled yarn is brought up. Since it cannot be unwound, the spinning yarn is pulled off near the surface of the package, causing end breakage and affecting the warping efficiency.
——Silent Ceiling
Since yarn cutting by the electric cleaner and yarn breakage occur at the same time, the yarn breakage occurs somewhere between the drum and the cleaner. The cut yarn in this section will bounce up and fall to the cleaner. On the upper flat plate, after the next splicing action of the spinning yarn is completed, when the trough drum is started, this section of the spinning yarn is easily rolled into the bobbin and becomes yarn waste.
——KW Zhao
Due to the poor strength of the spinning yarn and too many strong weak links, the tension breakage of the spinning yarn occurs below the splicer. After the spinning yarn is broken, it bounces up irregularly and loosely rests on the small end of the paper tube. . When the large suction nozzle is searching for the head, the bobbin is reversed and the spinning yarn on the small end of the paper tube is tightly wrapped around the small end of the paper tube. If the big suction nozzle does not pull off the yarn wrapped around the small end of the paper tube during the first search, then the big suction nozzle will go up to search for the second, third or even fourth time. During these multiple search processes , the yarn wrapped around the small end of the paper tube will be broken. After the yarn is broken, two ends will be produced, one of which is brought down by the large suction nozzle, and is twisted together with the lower yarn end brought up by the small suction nozzle in the splicer. The trough drum is started to complete a splicing process. . During this twisting process or the next twisting process, the waste yarn left on the small end of the paper tube is easily brought into the bobbin to form waste wire, and one end of the waste wire is shallowly attached to the bobbin, while the other end remains Wrap it around the small end of the paper tube.
——Cold water gold
Solution
To solve the problem of the large suction nozzle sucking up messy yarn, we must first ensure the success rate of the large suction nozzle looking upwards for the yarn end. Pay attention to how the large suction nozzle picks up the yarn end, and watch all the spindles of all winding machines that produce this type of yarn. The success rate of the large suction nozzle’s first search for the yarn end must be guaranteed to be above 99%.
——liunong1911
If it cannot reach more than 99%, improvements can be made in the following aspects: adjust the distance between the large suction nozzle and the yarn package according to the standard; check the length, roundness and hardness of the paper tube, and discard those that fail paper tube; there are three gears available for the reverse drive of the grooved drum, namely fast, medium and slow. Do experiments according to these three conditions to see which one has the best head-finding effect. After the drive is determined, the drive acceleration is also You can make a choice and conduct experiments for different accelerations to select the optimal process for use on the machine; secondly, when the success rate of yarn end search is guaranteed, set the number of search times for the large suction nozzle to a minimum. Because the more times the large suction nozzle searches, the greater the chance of random yarn suction. If you suck too many times, the yarn on the surface of the package will be sucked into chaos. At the same time, adjust the number of large nozzle movements and splicing times accordingly.
——liunong1911
To solve the problem of yarn waste in electric cleaners, we can start from three aspects: improve the cotton distribution to reduce the strong weak links on the spinning yarn, thereby reducing the breakage at the contact point between the groove drum and the bobbin; secondly, strengthen the equipment inside the production workshop, Control the temperature, humidity and operation to prevent the occurrence of occasional yarn defects, optimize the pre-spinning and spinning processes, and reduce the number of yarn cutting times for electric clearing; thirdly, the yarn catching nozzle must be thoroughly cleaned at least every 5 days , ensuring that the yarn catching mouth is not blocked and can pick up yarn waste anytime and anywhere.
——KW Zhao
For weak loops, the first step is to reduce the strong weak loops. In the company’s cotton distribution, replace the raw cotton with low single fiber strength and replace it with raw cotton with high strength, so that the small strength of the single yarn produced has an obvious improvement. At the same time, the winding speed can be reduced. When the spinning speed is reduced, the tension generated during the spinning process will be significantly reduced, and the generation of yarn waste can also be reduced.
——Cold water gold
For weak loop yarns, a balloon tracker can be used on the winding spindle. It can greatly compress the balloon produced when the bobbin is unwound, significantly reducing the contact area between the spinning yarn and the air, and directly reducing the spinning cost. Tension to reduce the occurrence of yarn waste. In addition, when the success rate of finding the yarn end is guaranteed, the process parameters of the automatic winding machine are optimized, the number of failed attempts to find the yarn end is changed to 1, the action of the large suction nozzle is changed to 1, and the “delayed lifting” of the package takes 10 turns. , use 10 circles for “delayed search for the upper yarn end” and 1 for the number of splicing failures. The reason why the above process parameters are used is because it is necessary to realize that the end of the waste yarn wound around the small end of the paper tube is floating in the air before it is wound into the bobbin. The single spindle of the automatic winding machine can be bright.When the red light alarms and the machine can stop, the operator has the opportunity to pull out the waste wire wrapped around the small end of the paper tube by rotating the bobbin, thereby achieving the purpose of removing this type of waste wire.
——Cold water gold
Operation Points
Achieve “look around and find the head”. Take a look at the spindle foot to see whether the bobbin is unlooped or “yarn bag”. If it is a bobbin, use the corresponding button on the single spindle to replace the bobbin under the spinning yarn extraction unit. Second, check whether there is wire waste hanging at the small suction nozzle. If so, the operator needs to remove the wire waste. Third, check whether the splicer is hung with wire loops. If so, clean up the wire loops. 4. Check whether there is yarn waste in the yarn clearer channel. If there is, find a way to clean it out. “One search for the head” means that after the single spindle turns on the red light and the alarm stops, the operator has to use his hand to find the head on the bobbin, instead of directly turning off the red light and starting the production of the single spindle. When the operator searches for the end with his hands, he takes a look at the left and right sides of the bobbin. If there is any waste wire wrapped around the big and small ends, he must completely withdraw the waste wire.
——The subtle fragrance of osmanthus
The application of a process such as “delayed head search” will have an impact on output. Spinning companies can flexibly decide what process to use based on their own requirements for output and quality, but before the new process is put on the machine, experiments must be done to determine whether it needs to be applied.
——liunong1911
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