As the last process of spinning and the first process of weaving, winding plays an important role in the field of textile. When the winder breaks down, it is necessary to find out the causes and solutions according to the primary and secondary factors.
▎ no rotation in tube stock
In the normal winding, after the tube yarn is unwound, the middle probe device detects and distinguishes and sends signals, and drives the driving mechanism to move the inserted spindle seat to the empty tube conveyor belt and kick the empty tube into the conveyor belt. The step motor makes the ratchet rotate for one tooth through the transmission rod, the tube yarn warehouse rotates for a certain angle, the full yarn is filled into the inserting spindle seat, and then the inserting spindle seat is moved back to the working position.
Because the ratchet part is blocked by cotton wool or rewinding, the ratchet can not be driven to rotate by the pawl, so the yarn shed does not rotate. As long as the parts of the yarn warehouse are removed, the lint or silk can be removed to return to normal. When cleaning with compressed air every week, the failure can be prevented as long as the cleaning is in place.
▎ tube yarn is frequently removed by tube changing device
This fault is caused by contamination and failure of the surface of the middle yarn detection device. Just wipe the part of the test surface clean. The best way to prevent this kind of failure is to clean the detection part of the yarn detection device. ▎ scissors are not sharp
If the scissors are not sharp enough to cut the yarn, the yarn sucked by the small suction nozzle will be folded into a pair of yarns at the fixed suction nozzle, so that it will be cut when passing through the yarn cleaner. Such repeated times will cause abnormal production and increase energy consumption. Remove the scissors during maintenance and replace with a new pair of scissors. Do not discard the scissors that are not sharp. They can be sent to the mechanical maintenance and processing workshop (referred to as the mechanical maintenance workshop) for sharpening before continuing to use.
▎ abnormal operation of tension device
The tension device provides proper tension to the yarn through the tension disc. Tension plate is divided into pressure plate and static plate. The static disk is fixed, and the pressure disk can move and swing axially. When the pressure plate is wound by the return wire, its movement is blocked, resulting in unstable tension, uneven winding density, and often broken ends. During the maintenance, disassemble according to the operation specifications, and clean the impurities such as the return wire.
▎ air leakage from large suction nozzle
When the big suction nozzle is at zero position, put a piece of yarn beside the big suction nozzle. If the yarn is sucked into the big suction nozzle, it means that the big suction nozzle leaks air. Air leakage from large suction nozzle will not only cause energy waste, but also make other parts lack of air pressure. Whether the large suction nozzle absorbs air is determined by the large suction nozzle energy-saving flap on the air door. If the movable board is opened, the air will be absorbed by a large suction nozzle, otherwise, the air will not be absorbed. The air leakage of the large suction nozzle is caused by the loose closure of the movable plate due to the plugging of the movable plate by the cotton dust. Therefore, during the maintenance, the damper shall be removed, the cotton dust shall be cleaned, the cylinder piston driving the movable plate to open shall be removed, and the sealing grease shall be applied to achieve the function of sealing and lubrication. After the installation of the damper, it is necessary to check whether there is no air leakage with the yarn again, so as to ensure one good one is guaranteed.
▎ unqualified or failed splicing
There are many reasons for unqualified or failed splicing. One is improper process design and unreasonable splicing parameters. The other is that the position of the shift rod is not correct and the yarn cannot be put into the splicer. The third is the lack of oil in the splicer, inflexible rotation, air leakage of the sealing ring, damage or poor spring up of the splicing cover. The first reason is that the splicing parameters can be changed due to human factors, and then the splicing test is carried out to check whether the splicing parameters are reasonable. The solution of the second reason is to loosen the fixing screw on the yarn drawing rod and correct the position. The third reason is the frequent phenomenon, which is also the key part of the maintenance work. Therefore, the maintenance can be carried out according to the specific situation. If necessary, add lubricating oil to the moving parts.
▎ yarn cleaner failure
The yarn cleaner is another key part that affects the quality of winding. Automatic winder usually adopts electronic yarn cleaner, which is divided into two types: photoelectric type and capacitor type. Taking the tk830 capacitor yarn cleaner produced by Loepfe company as an example, if there is mechanical wave in the tube yarn, the yarn cleaner will cut after several turns of the groove drum, at this time, the tube yarn can be changed back to normal production. When the yarn cleaner fails, it will cut frequently in a short period of time, so that the production cannot continue. The troubleshooting method is to reset the yarn cleaner, and the reset times should be more than twice to ensure that the reset is accurate. If the reset is invalid, it can be concluded that the electronic components inside the yarn cleaner are damaged and can be handled by an electrician.
▎ the big and small collets of the yarn holding arm are not flexible in rotation.
The big and small collets on the drum yarn holding arm are all high-speed parts, whose speed is close to that of the grooved drum, so bearing wear often occurs. After the failure, it is difficult for the bobbin to rotate and the yarn is not evenly arranged, which will give an alarm prompt. As long as the bearing in the chuck is taken out and replaced with a new one, normal production can be resumed.
