In theory, increasing the speed of the flat plate can increase the degree of carding, while reducing the fiber load of the flat steel needles, thereby improving the quality of the cotton web. Special equipment for the textile industry on the winder. As the last process of spinning and the first process of weaving, winding is the link between the past and the next.“bridge”Therefore, it occupies an important position in the textile field.
Carding machines are used to process cotton fibers and chemical fibers and belong to textile machinery. According to the spinning process, carding is an important process. The front process of the carding machine is the opening and cleaning machine, and the latter process is the drawing frame (carding process) or the sliver coiler (combing process).
During the spinning process of the spinning frame, the semi-finished roving or sliver is drafted, twisted, and wound into a spinning machine. The combed sliver and the needle-carding machine combine the sliver, the needle row is drafted to improve the sliver structure, and the roving is further spun into spun yarn on the ring spinning frame, which is the main spinning machine. However, practice has proved that only when using low-grade cotton, due to the high impurity content of the plate, it is necessary to appropriately increase the plate speed. Increasing the speed can improve the efficiency of plate impurity removal, improve the quality of the cotton web, and improve the neps, impurities and yarn strength. However, when processing high-grade raw cotton, the flattening speed is reduced, and the quality of the cotton web rarely changes.
This is because the flattening speed has no significant effect on the carding degree of the cotton bundle, but when the flattening speed increases, the flat pattern rate increases greatly, the impurity rate in the flat pattern decreases, and the fiber content increases, which is not conducive to the use of neps. Tables 2-3 show the changes in web quality noil and coverage at different speeds. The test proves that 21. The speed of the cover plate is continuously accelerated, and it has no effect on the neps and impurities of the less sliver, and the effect is significantly improved.
Although the weight of the cover plate flower on each cover plate helps to reduce, but because of the increase in the speed of the cover plate, there are many studies, so the cover plate flower rate still rises significantly, which is not good for saving cotton. 2. The cover is faster, the cleaning efficiency of the cover used is only about 3% higher, but the plush loss increases by 0.7“ -” 1. The impurity content is calculated as 40% of the noils in the back of the car, and then it will be used as the estimated amount of disconnected impurities, and the noils will be increased by about 1.2-1.7%. In this case, the silver neps have more impurities to fall.
Therefore, the increase in the speed of the hood is better to increase the belly cotton as well. 3. After the speed of the cover plate is continuously accelerated, although the long-pile rate of the cover plate and the flower does not increase rapidly, the loss rate of the long-pile is very high. When using ordinary carding machine to produce high-grade raw cotton, the speed of the cover plate can be selected in the range of 25~50mm/min.
When a lower covering speed is selected, and the quality of the cotton web does not deteriorate significantly, the flower rate of the cover plate can be reduced. However, due to the increase in the impurity content of the cover plate, the overall impurity removal efficiency of the cover plate does not decrease. In order to further improve the quality, the carding machine often adopts the method of controlling or reducing the pattern rate of the flat plate and increasing the noil rate of the back belly.
When spinning low-grade cotton, there are many fiber seeds and impurities in the roll. Sometimes we need to increase the speed of a flat plate to 62.5"-'90 mm/min. Using the A1B6 carding machine, in the production of 20 -30kg/h, then the speed can be selected in the range of cover 1B3-274mm/min. For example, in the above spun yarn count (under 18 inches) 32, the cover can be selected with a speed of 274mm/min and the number of spun 20-30 ( Branching 20-30 inches) cotton, a cover speed option of 222 mm/min; spinning 19-gauge or smaller (greater than 32 inches) cotton, a cover speed option of 183 mm/min.
The most suitable cover for speed development should be determined according to the raw cotton conditions, through the actual application test of the enterprise, and after checking the quality of the cotton web and the impurity content of the cover.
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