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Common faults and troubleshooting methods of winding machines

September 12,2023

As the last process of spinning and the first process of weaving, the winding tube plays a bridging role and occupies an important position in the textile field. When the Winding machine malfunctions, it is necessary to identify the cause and solution of the malfunction based on primary and secondary factors.

1. Tube yarn storage not rotating

During normal winding, after the unwinding of the tube yarn is completed, the central yarn detection device detects and issues a signal, driving the transmission mechanism to move the inserting spindle seat towards the empty tube conveyor belt and kick the empty tube into the conveyor belt. The stepper motor rotates the ratchet wheel by one tooth through the transmission rod, and the tube yarn magazine rotates at a certain angle to fill the full yarn into the inserting spindle seat, and then the inserting spindle seat moves back to the working position.

Due to the blockage of the ratchet by cotton wool or silk winding, the pawl cannot drive the ratchet to rotate, resulting in a malfunction of the yarn magazine not rotating. As long as the yarn library components are removed and the cotton or silk fibers are removed, normal operation can be restored. When using compressed air for cleaning work every week, as long as the cleaning is in place, it can prevent the occurrence of this malfunction.

2. The tube yarn is frequently removed by the tube changing device

This fault is caused by the surface contamination and malfunction of the central yarn detection device. Just wipe the surface of the test clean. Regularly cleaning the detection part of the yarn detection device is the best way to prevent this type of malfunction.

3. The scissors are not sharp

If the scissors are not sharp enough to cut the yarn, the yarn sucked by the small suction nozzle will fold into a double yarn at the fixed suction nozzle, causing it to be cut when passing through the cleaner. This repeated process can cause abnormal production and increase energy consumption. When repairing, remove the scissors and replace them with a new pair. Do not discard scissors that are not sharp. They can be sent to the mechanical repair and processing workshop (referred to as the machine repair workshop) for sharpening and continued use.

4. Abnormal operation of tension device

The tension device provides appropriate tension to the yarn through a tension disc. The tension plate is divided into a pressure plate and a stationary plate. The stationary disc is fixed, while the pressurized disc can move and swing axially. When the pressure plate is wrapped with wire, its movement is hindered, resulting in unstable tension, uneven winding density, and frequent breakage. During maintenance, it is necessary to disassemble according to the operating specifications and remove debris such as wire returns.

5. Air leakage from the large suction nozzle

When the large suction nozzle is in the zero position, place a piece of yarn next to the large suction nozzle. If the yarn is sucked into the large suction nozzle, it indicates that the large suction nozzle is leaking air. The leakage of the large suction nozzle not only causes energy waste, but also causes insufficient air pressure in other parts. Whether the large suction nozzle absorbs air or not is determined by the energy-saving flap of the large suction nozzle on the air door. If the trap is opened, the large suction nozzle will suck in air, otherwise it will not suck in air. The air leakage of the large suction nozzle is caused by the loose closure of the valve plate caused by cotton dust. Therefore, during maintenance, the air door should be removed, the cotton dust should be cleaned up, and the cylinder piston that drives the valve plate to open should be removed, and sealing grease should be applied to achieve sealing and lubrication. After the installation of the damper, it is necessary to check again with yarn to ensure that there is no air leakage and ensure that each one is guaranteed.

6. Unqualified or failed splicing

Unqualified or failed splicing can be caused by multiple reasons. One is improper process design and unreasonable splicing parameters. The second reason is that the position of the yarn lever is incorrect and the yarn cannot be pulled into the splicer. The third issue is the lack of oil in the splicer, the inflexibility of rotation, the leakage of the sealing ring, and the damage or inflexibility of the splicing cover. The first reason is that the splicing parameters can be changed due to human factors, and then splicing tests can be conducted to verify whether the splicing parameters are reasonable. The solution for reason two is to loosen the fixing screw on the yarn pulling rod and correct the position. The third reason is a common phenomenon and a key part of maintenance work. Therefore, maintenance can be carried out according to the specific situation, and if necessary, lubricating oil can be added to the moving parts.

7. Failure of yarn cleaner

The yarn cleaner is another key component that affects the quality of winding. Automatic winding machines usually use electronic yarn cleaners, which are divided into two types: photoelectric and capacitive. Taking the TK830 capacitive yarn cleaner produced by LOEPFE company as an example, if there are mechanical waves in the tube yarn, the cleaner will shear after several turns of the groove drum. At this time, changing the tube yarn can restore normal production. When the yarn cleaner fails, there will be frequent cutting movements in a short period of time, making it impossible to continue production. The troubleshooting method is to reset the yarn cleaner at least twice to ensure accurate resetting. 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.

8. The gripping arm of the tube yarn and the size of the collet cannot rotate flexibly

The large and small chucks on the yarn gripping arm are all high-speed components, and their rotational speed is close to the speed of the groove barrel, so bearing wear often occurs. After the malfunction occurs, it is difficult for the bobbin to rotate and the yarn arrangement is uneven. An alarm prompt will appear. As long as the bearings in the chuck are removed and replaced with new ones, normal production can be resumed.