With the development of the textile market situation, reducing the number of employees and reducing the labor intensity of employees has become an urgent task.
In this situation, how to make good use of collective doffing devices is a problem that equipment manufacturers and textile enterprises must solve.
Equipment
1
Rings, spindles, yarn guide hooks, balloon rings, pipe grippers, and yarn separators are at the same center point, which is also the basic requirement for spinning production.
2 Traveller cleaner is used to clean the accumulated travellers. In principle, the smaller the yarn number, the smaller the distance. If the distance is too large, it will not only fail to clean, but it will also easily fall out of the traveller during doffing, which will increase the number of broken heads. Twisted yarn and broken ends. 3
To select a suitable leaf plate height, it is generally recommended that the starting position is 20 mm to 25 mm from the top of the tube; in conjunction with the selection of a suitable traveller specification, the yarn does not touch the spacer plate when the yarn is small, and when the yarn is large The yarn does not touch the end of the bobbin.
4
The ring plates should be at the same height, and the ring height should be in the middle of the waste wire tray during doffing.
5
Select the appropriate flat and shuttle cycle. The condition of the equipment is the basis of normal production. It is required to carry out a thorough dredging every half a month, to perform partial security work every four months, to do a good job of lubrication and daily maintenance. Each unit can accumulate its own accumulated experience. Make your own maintenance plan.
6
Choose a suitable traveler replacement cycle. A reasonable traveler use cycle has a great impact on the breakage. The cycle is too long. The spinning channel is severely worn. The lighter scratches the yarn, resulting in a decrease in strength. The sliver details will be severe. Produces neps. It is necessary to explore a reasonable period according to the spinning speed, the production variety, the spinning form, the type of traveller and the manufacturer.
7
Choosing a suitable tailing yarn cleaning cycle, the tailing yarn cleaning has a great relationship with the head retention rate of the drive, because the tailing yarn will interfere with the normal yarn operation when driving, and constantly rubbing against the normal yarn, resulting in increased end breaks and increased yarn Line hairiness, so a reasonable cleaning cycle should be established.
8
Maintain the collective doffing device to ensure that the height of the air rack, the entry and exit, the left and right positions are normal, and the operation is in place.
Craftsmanship
1Use a reasonable spindle speed curve to ensure the head retention rate before doffing. The spindle speed curve can be refined into multiple stages, and as smooth as possible during the entire shifting process, the speed curve is smooth, avoiding sudden acceleration and premature deceleration, and maximizing the contradiction of production and life. 2
Select the appropriate traveller shape and quality. Choose the corresponding traveler model according to the ring model. The opening should not be too large, but the yarn must have ample passage. The principle of selecting the weight is that the small yarn does not touch the spacer and the large yarn. The wire does not touch the bobbin tip. The 3-bundle yarn (yarn wound on the yarn body at the time of doffing) is based on 0.5 to 3 turns. The higher the yarn count, the more the turns, and vice versa. 4
The tail yarn (insurance yarn wound on the waste silk reel) is in principle as small as possible, but it must be ensured that the insurance yarn cannot be pulled apart while the yarn is being cut.
5
Ensure that the spindle can stop suddenly during braking time after rotating at a sufficient speed, in order to reduce the weak twist in the roller triangle area, especially ring spinning is more important.
6
The take-up position (the position where the ring plate is raised during doffing) should be higher than the cutter in principle to ensure that the yarn is easily cut.
The 7th yarn position (the highest position of the ring plate when driving) must ensure that the downward distance is sufficient to stretch the braid yarn, and the yarn cannot be broken due to the excessive downward distance. At the same time, the winder response must be taken into account. It is difficult to unwind the winder due to too high and medium yarn. 8
When driving the spindle speed, it is necessary to ensure that the balloon is opened at a sufficient speed for timely twisting, and at the same time, the instantaneous tension caused by the high spindle speed will not cause the yarn to break, and the braid yarn will be pulled in conjunction with the speed of the lower ring plate. open.
Operational aspects
1st gear operator should ensure the head retention rate before doffing. Generally, no more than 5 cars are required. After the doffing, the bellows flowers should be pulled out in time to ensure that the flue tube suction and the aggregate spinning negative pressure are normal. 2
The doffing worker should follow up with the doffing machine in time, try to participate in the doffing process as soon as possible, pick out the unqualified bobbins, remove and replace the bobbins that have not been returned, and clean the yarn guide hook and flute. Broken yarn at the nozzle to reduce doffing time and drive in time.
