There are two viewpoints on the selection of the licker-in speed of the carding machine. One viewpoint is that the speed of the licker-in roll should be lower, because the high licker-in roll speed will make the fiber bundle separation better, but it will also increase the fiber damage. The increase of short staples and the increase of neps is not conducive to the improvement of product quality. Another point of view is that the speed of the licker-in should be high, because the high speed of the licker-in is conducive to the carding of the fibers, which can greatly improve the separation of the fiber bundles, although it has a negative impact on the fibers. Great damage. 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.
Grinder A spinning machine that turns fiber strands into rovings. The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame. 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.
1. The main influencing factors that determine the licker-in speed and its correlation We believe that high speed and low licker-in should be dialectical, because the licker-in speed and the level of open and clean cotton quality, card production, fiber fineness, maturity, In addition to combing and other factors, the decision to deburr high and low roll speeds must take into account all of the above factors. (1) The relationship between the cleaning quality and the speed of the roller , which is helpful for sorting. The carding coefficient formula can be used to discuss the relationship between carding rolls and carding rolls.
(2) Selection of fiber separation degree, lint rate and licker-in speed From the perspective of improving and fiber bundle separation, the licker-in speed should be high; from the perspective of reducing lint, the licker-in speed should be low. Therefore, it is necessary to analyze and study the degree of influence of the two on the yarn quality management, and then we choose the development range of the licker-in speed. Some people have come to the following conclusion after analyzing the technical test data: the fiber bundle separation degree has a stronger influence on the yarn quality than the fiber lint rate.
Therefore, the licker-in speed should be high for some enterprises to choose. The selection of licker-in speed is also restricted by other important social factors, which will not be discussed here. 2. Analysis of several viewpoints (1) The speed of licker-in does not exceed 950 rpm. Some people at home and abroad can think that the development of licker-in speed should not exceed 950 rpm, because no more than 950 rpm will cause the damage of fiber cells to increase continuously, and the neps It also increases, which in turn affects the yarn quality.
In our own opinion: with the development of the card in the direction of high yield and high quality, it is necessary to rotate the licker-in. 2. The rotation speed of the licker-in is not more than 950 rpm, which is only suitable for fibers with low maturity and fine fibers, while the higher the rotation speed of the licker-in with high maturity and fine coarse fibers, the fewer neps and the better the yarn quality. ③ Although the licker-in speed increases the resolution, but also can cause a variety of short fibers, the degree of influence is due to the separation of the mass greater than that of the staple fiber yarn, so in general, it should increase the licker-in speed.
④For general enterprises, except for raw cotton with very low technical maturity, the development of licker-in speed will not affect the cotton net neps. ⑤ Some plants, many factories in the actual investigation of fine yarn in the process of processing, when the licker-in speed is high (higher than 950rpm), but it does not decrease the yarn quality. (2) The reason why imported cards such as C1/3 and DK2 are relatively lower than the A186 card licker-in speed is that foreign cards (such as C1/3) are better than domestic washing series, and the cotton bundle is smaller than that of domestic washing series. much more.