Introduction: Summarize the solutions to the problem of wire residue attached to the ESPERO-M type winding machine. The analysis of various causes of yarn waste in ESPERO-M points out that the yarn waste is related to poor spinning yarn formation, bobbin delooping, winding mechanical problems, operating problems, electronic yarn clearer parameter settings, etc. It is believed that by taking corresponding measures to prevent the bobbin from unwinding, correctly setting the position of the large and small suction nozzles, reasonably setting the electric cleaning parameters, doing a good job in cleaning, effectively controlling the splicing quality and taking corresponding equipment maintenance measures, the winding machine can reduce the The waste yarn is attached to achieve the effect of reducing consumption and improving quality.
The winding process is the last process in the spinning section. The yarn from the previous process is cleared, spliced and applied with appropriate tension to wind it into a package with a solid appearance and suitable for weaving. During the production process of the ESPERO-M type winding machine, yarn residue often occurs, which causes the problem of package yarn layer entrainment, leading to loom breakage and affecting the efficiency of the loom.
ESPERO-M type winding machine’s yarn waste attachment analysis shows that yarn waste or yarn clumps appear in the package, but no obvious yarn defects appear after separation. This phenomenon can basically be divided into two situations. The first is to attach it in front of the electronic yarn clearer (hereinafter referred to as the electric yarn clearer). The yarn is in the lower part of the winding channel and forms a ball due to winding, hanging and winding, or the yarn grabbing suction nozzle sucks the yarn when the machine is stopped. When the winding machine is turned on, It was not cut off but attached to the yarn after being cleaned. Second, after the yarn has passed the electric cleaning process, the yarn waste is attached to the package during the winding process, causing the yarn waste to be attached to the package yarn.
The tensioning method of the tension disk, which is filled with accumulated yarn and wrapped around it, is changed from pneumatic to electromagnetic. During the yarn unwinding process, the tension disc is deformed or has poor function. The movement of the yarn body cannot be effectively controlled when the yarn passes through. The yarn fluctuates when it passes through the yarn guide plate, which easily forms yarn clumps and random yarns attached to the package. . If the tension plate is not smooth, the yarn waste will be wrapped around the tension plate; if the tension plate starting device is not sensitive, the chuck will not reset, causing the yarn waste to be wrapped around the tension plate; if the yarn has multiple strands, it will be entangled with each other and hang on the tension plate. On the plate. In response to this phenomenon, the accumulation of flowers and winding yarn in the tension disk should be promptly cleaned; the pneumatic device should be kept flexible; deformed and malfunctioning tension disks should be repaired in a timely manner.
The electric cleaner is not sensitive
Excessive cotton wax and oil residue in the electro-cleaning channel. During the processing of fibers, cotton wax or oil residue remains in the electro-cleaning channel, which can easily lead to miscutting and the attachment of waste yarn. For excessive cotton wax and oil residues, use special detergent or warm water to clean it every 15 days, and turn off the power during cleaning. Calibrate and test the sensitivity of the electric clearer as planned to prevent insensitivity problems caused by deviations. Especially when spinning color-spun varieties, residual dye can easily cause this problem. The residue should be cleaned up in time to ensure that the channel is clean.
Excessive temperature and humidity may cause mis-cutting of the electric cleaner. The ESPERO-M type winding machine can be equipped with electric cleaners including Uster capacitive type, Lofi photoelectric type and Kesokai photoelectric type. In order to ensure the relative humidity during production, certain humidification measures should be taken. Since capacitive cleaners are more sensitive to relative humidity, when the humidification is too high, the cleaners will cut more by mistake, resulting in the attachment of waste yarn and an increased chance of short lint. In order to solve this problem, measures can be taken to install humidification nozzles at the rear of the vehicle to humidify at fixed points to reduce the problem of mis-cutting of the electric cleaner caused by excessive humidification.
The large suction nozzle is incorrectly positioned or malfunctioning
1. The comb needle inside the large suction nozzle does not work well
The inverted teeth of the comb needle in the large suction nozzle will cause the yarn waste to become tangled, hung, and twisted. The yarn waste will easily attach to the yarn ball with the movement of the large suction nozzle, causing yarn defects. The large suction nozzle should be cleaned once a month. After removing the silk waste, soak the large suction nozzle in warm water to remove cotton wax. Comb needles with damaged undercut teeth should be repaired promptly to prevent them from getting tangled, hung, or twisted.
2. The position of the large suction nozzle is incorrect
Improper position of the large suction nozzle can easily cause poor yarn formation, yarn breakage, and yarn climbing problems. It is also prone to clumps of yarn attached, affecting weaving. The main reason is that the large suction nozzle and the tank protective cover are improperly positioned and the screws are not firmly tightened. The large suction nozzle grabs the yarn, which easily causes friction with the surface of the package during the forward and reverse rotation of the groove drum, causing problems such as deterioration of yarn quality, excessive hairiness, high neps, and disordered package yarn. The main reason is that the tight connection and fastening between the large suction nozzle and the nozzle arm does not meet the requirements, causing the large suction nozzle to become loose and skewed. Since the large nozzle and the nozzle arm are two assembled parts, the friction factor between the smooth surface and the smooth surface is small during use, and slippage and loosening are prone to occur. In order to solve this problem, a pitted gasket with a length of 100mm and a width of 30mm can be installed at the connection between the large nozzle and the nozzle arm. The friction factor can be increased by tightening, so that the connection between the large nozzle and the nozzle arm can be tight connections to solve this problem. The incorrect position of the large suction nozzle should be corrected in time to ensure that the position of the large suction nozzle and the package yarn are consistent, and to reduce the attachment of yarn waste caused by grabbing.
3. The yarn twist is too large
When the twist of the spun yarn is too large, the yarn will easily rebound into a ball and tighten on the yarn ball after the package yarn is broken, and the yarn will be attached during the winding process. When the above situation occurs, the yarn twist can be appropriately reduced according to quality requirements. The twist coefficient is reasonably controlled according to the requirements of weaving or knitting yarn. Generally, knitting yarn is controlled at around 330, and woven yarn can be controlled at around 370.
4. The small suction nozzle does not work well
4.1 The negative pressure of the small suction nozzle is too large. The negative pressure of the small suction nozzle is too large. It is easy to absorb the yarn residue when the machine is stopped, and it will be attached to the yarn ball after the machine is started.
Reasonable settingSet the fan to negative pressure. The fan motor frequency should be set to 40HZ without affecting the suction negative pressure to prevent the yarn from being sucked into the suction nozzle in a tension-free state when the machine is stopped. There are two parking modes for the electric cleaner. One is that the electric cleaner operates to cut off the yarn when it stops, and the other is that it slows down and does not cut off the yarn when it stops. The latter parking method often causes yarn waste to be sucked in. In this case, when the machine is stopped and restarted or a fault starts, the yarn can be interrupted and re-spliced to reduce the probability of yarn yarn clumps attaching.
4.2 Small suction nozzle for hanging yarn
The function of the small suction nozzle is to assist in catching the yarn and sucking away the waste yarn. After its action, the small suction nozzle stops at the yarn channel. Once the stop position is wrong, friction will occur between the yarn and the small suction nozzle, causing yarn waste and entanglement. To address this problem, the small suction nozzle joint can be corrected to keep the position with the yarn body at 10mm. At the same time, a lubrication cycle every three months can be strictly implemented to ensure that it works well and prevent adverse effects on quality.
5. The U value setting of the electric cleaner is unreasonable
The U value of the electric cleaner is the sensitivity threshold for multiple yarn cuttings. If the yarn cutting sensitivity is set too low, it will cause double yarns not to be cut or multiple yarns not to be cut, causing them to enter the package yarn and cause defects. If the U value of the electric cleaner is set too large, it will cause problems with double or multiple yarns not being cut. Setting the U value below 75% can improve its sensitivity.
6. Spun yarn bobbin delooping
Due to the high operating speed of the winding machine, the spun yarn bobbin is prone to delooping during unwinding. During winding, the yarn layer that is unlooped passes through the pre-clearer and yarn guide plate along with the high-speed running yarn. After being cut by the electric cleaner, it is easily wound on the package yarn with the inertia of the upper yarn. In the process of repeatedly searching for yarn, the large suction nozzle will pull out a piece of yarn from the mess of yarn. After passing the electric cleaning test and splicing it with the next yarn, it will continue to wind, forming a random yarn in the package yarn. Increase the bobbin capacity and design it rationally to prevent the bobbin winding from being too large and causing the spun bobbin to unwind. At the same time, ensure that the spinning yarn winding effect is good and that the forming cam transmission part has no mechanical parts to wear, and check that the collar plate is raised and lowered without any interruption during operation; the yarn end should be coiled when replacing the traveler during the spinning yarn maintenance; during the spinning operation process, the phenomenon of doffing should be controlled. And the spun yarn delooping phenomenon is caused by the long low-speed running time after spinning and the loose yarn winding layer structure.
7. Improper setting of the proximity of the large nozzle
In order to ensure that there is sufficient negative pressure when the large suction nozzle finds the yarn, and at the same time it does not come into direct contact with the package yarn, there is a proximity adjustment between the large suction nozzle and the package yarn. When adjusting the proximity between the large suction nozzle and the package yarn, it is usually adjusted with reference to the distance between the large suction nozzle and the package yarn when the diameter of the large end of the package yarn is 90cm, which is generally 2mm-2.5mm. If the distance is too large, it will affect the negative pressure of the large suction nozzle when suctioning yarn, affecting the success rate of finding the yarn; if the distance is too small, when the package yarn is large, the large suction nozzle will come into contact with the package yarn, which may easily cause Messy yarn. Improper position of the large suction nozzle is prone to poor yarn formation, yarn breakage and yarn climbing problems, which affects weaving. The main reason is that the relative position of the large suction nozzle and the tank protective cover is incorrect, and the screws are not tightened firmly. To correct this position, ensure that the distance between the large suction nozzle and the tank protective cover is 3mm. This problem can be effectively prevented by tightening the screws.
8. Repeat the joint action multiple times
The grooved drum rotates clockwise during winding and counterclockwise when the large suction nozzle is looking for the end. The success rate of one splicing is low, the joint action will be repeated many times, and the grooved drum will continue to rotate forward and reverse in a short period of time. Changing the operation and accompanied by the yarn-finding action of the large suction nozzle may easily cause the yarn to be messed up or the yarn to be attached. In response to the above problems, the splicing quality should be effectively controlled to improve the success rate of one-time splicing to reduce the amount of wire attached during splicing.
9. Bring in big and small heads with ribbons
When the yarn is broken during the unwinding process, the large and small ends of the yarn are brought in and placed at both ends of the small chuck and the large chuck. During the operation, the yarn will be brought into the yarn ball and cause attachment. During production, emphasis should be placed on controlling the problem of spin yarn de-looping during the winding stroke, and reducing the phenomenon of yarn residue attached to the large and small chucks caused by de-looping; a brush device can be installed at the small chuck to reduce yarn residue attached to the yarn.
10. Hang the yarn in the yarn channel after electro-cleaning
On machines equipped with TK840 series electric cleaners, since there is a yarn control device above the electric cleaner detection device, it is easy to cause yarn to hang back. Since it has passed through the electro-cleaning inspection device, the hung wire cannot be detected and cut off, which increases the probability of the wire attached. During the production process, the operator should pay attention to the yarn channel sensor on the TK840 series electric cleaner and clean it in time.
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