How to reduce the winding back of the yarn during spinning?

In the spinning process, there is always a problem that is a headache - the winding back of the yarn, which causes the yarn to break during the warping process, which seriously affects the warping efficiency. What are the reasons for the return wire? How to reduce the return wire? Let us listen to the good suggestions from netizens.

cause

The yarn is sucked up by the large nozzle to form a yarn. When the warp is unwound, the tangled yarn is taken up. Since it cannot be unwound, the yarn is pulled off near the surface of the package, forming a broken head and affecting the warping efficiency.

- silent ceiling

Since the electric cleaning yarn and the yarn breakage occur at the same time, the yarn breakage occurs somewhere between the drum and the electric cleaning, and the cut yarn will bounce and fall to the flat above the electric cleaning. Above, when the next splicing action of the yarn is completed, when the drum is started, the yarn is easily entangled into the bobbin to become a yarn.

——Zhao KW

Due to the poor strength of the yarn, the strong weak ring is too much, causing the yarn breakage of the yarn to occur below the splicer. After the yarn breaks, the yarn bounces irregularly and loosely laps onto the small head of the paper tube. In the process of finding the head, the large nozzle sucks the yarn on the small head of the paper tube firmly around the small head of the paper tube. If the big nozzle does not pull the yarn wrapped around the small head of the paper tube for the first time, then the big nozzle will go up for the second time, the third time or even the fourth time. In the process, the yarn wrapped around the small head of the paper tube will be broken. After the yarn is broken, two heads are produced, one of which is carried by the large nozzle, and the lower yarn end which is brought up by the small nozzle is spliced ​​together in the splicer, and the drum is started to complete a splicing process. . During this splicing process, or during the next splicing process, the return wire remaining on the small head of the paper tube is easily brought into the bobbin to form a return wire, and one end of the return wire is shallowly attached to the bobbin, and the other end remains the same. Wrap around the small head of the paper tube.

- cold water gold

Solution

To solve the problem of large suction nozzles, it is first necessary to ensure that the large nozzles move upwards to find the success rate of the upper yarn ends. Pay attention to the situation of looking at the yarn end of the big nozzle. Observe all the spindles of all the winders of this kind. The success rate of the first nozzle for the big nozzle should be more than 99%.

——liunong1911

If it is less than 99%, it can be improved from the following aspects: adjust the distance between the large nozzle and the yarn according to the standard; check the length, roundness and hardness of the paper tube, and discard those that are unqualified The paper tube; the reverse drive of the tank has three gears available, which are fast, medium and slow, respectively. According to these three conditions, the test is carried out to see which one is the best in finding the head. After the drive is determined, the drive is accelerated. It is also possible to select and test different accelerations to select the optimal process. Secondly, when the success rate of the yarn end is guaranteed, try to set the number of times the large nozzles are found to be the least. Because the more the number of heads of the big nozzles, the greater the chance of smashing the yarn. The number of suctions is increased, and the yarn on the surface of the package is squirmed. At the same time, adjust the number of large nozzle movements and the number of splicing.

——liunong1911

Solving the electric cleaning yarn can start from three aspects. First, improve the cotton blending to reduce the strong weak ring on the yarn, thereby reducing the breakage at the contact between the drum and the package; second, to strengthen the equipment inside the production workshop. Management of temperature, humidity and operation, to prevent the occurrence of sporadic rovings, to optimize the process of pre-spinning and spun yarn, and to reduce the number of yarn cutting of electric cleaning; third, to make a thorough inspection of the yarn-catching nozzle at least every 5 days. Clean, ensure that the yarn catching nozzle is not blocked, and the yarn can be sucked at any time and anywhere.

——Zhao KW

For the weak loop return wire, the first is to reduce the strong weak ring. In the company's cotton blending, replace the raw cotton with low strength of single fiber and replace it with strong high raw cotton, so that the minimum strength of the single yarn produced has an obvious Improvement. At the same time, the winding speed can be reduced, the spinning speed is reduced, and the tension generated during the spinning process is significantly reduced, which also reduces the generation of the yarn.

- cold water gold

For the weak loop return wire, the balloon tracker can be used on the winding single spindle, which can greatly compress the air ring generated when the tube yarn is unwound, significantly reduce the contact area between the yarn and the air, and directly reduce the spinning tension. To reduce the generation of silk. In addition, in the case that the success rate of the yarn end is guaranteed, the process parameters of the automatic winder are optimized, the number of failures of finding the yarn end is changed to 1, the action of the large nozzle is changed to 1, and the movement of the bobbin "delayed up" is 10 times. , "Lazy search for the upper yarn end" with 10 laps, and the number of splicing failures is 1. The reason for using the above process parameters is that the end of the automatic winding machine can be illuminated by a red light and can be stopped before the end of the wire that floats on the small end of the paper tube floats in the air before it is wound into the package. The driver has the opportunity to pull the wire wound around the small end of the paper tube by rotating the bobbin, thereby achieving the purpose of eliminating such rewinding.

- cold water gold

Operation points

Do "four look and find the head." At the top of the ingot, the bobbin or the bobbin is produced. If it is a bobbin, the corresponding bobbin on the single ingot is used to replace the bobbin under the yarn extracting unit. Second, see if there is a thread on the small nozzle. If it is, the driver needs to remove the wire. Third, check if the wire is hung back at the splicer. If it is, clean the wire. Fourth, see if there is any yarn in the channel of the yarn clearer. If there is, try to clean it up. “One look for the head” means that after the single-red bright red light alarm stops, the driver must use his hand to find the head on the package instead of directly extinguishing the red light to open the single ingot production. When the driver looks for the head by hand, look at the left and right sides of the package. If the reel is rolled over the size of the head, be sure to withdraw the return wire completely.

——Osmanthus fragrance

Applying a process like “delayed to find the head” will have an impact on production. Spinning companies can flexibly decide which process to use based on their own requirements for production and quality , but before the new process, it is necessary to test to determine if the process needs to be applied.

——liunong1911