The carding work is mainly to further comb the fiber bundles and small cotton sheets on the cotton roll to separate them into single fibers. 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. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit.
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. In this way, we can continue to remove impurities from the coil, we can have the opportunity to mix the fibers evenly, and finally get the sliver to the required quality.
Therefore, cotton processing is the primary task of Hangzhou cotton processing. Carding analysis The stability of fibers depends on the degree of carding of the licker-in and the degree of carding between Xinjinlong and the flat plate. It is customary to take in the carding process“Strong carding and tight spacing”Technological measures 1. The separation of the licker-in Usually, increase the speed of the licker-in, appropriately increase the pressure of the feeding roller (the groove and straight state of the feeding roller must also meet the specifications), and reduce the licker-in and the feeding board. It is the only way to enhance the carding effect of the licker-in.
Practical research has proved that strengthening the carding of the licker-in can decompose 70-80% of the cotton and bundles in the lap into single-cell fibers, and remove 75% of the impurities. Therefore, the licker-in and licker-in play an important and decisive role in the separation and removal of fibers and impurities in the entire carding process. Carding quality is mainly expressed as the percentage of single fiber cells.
The higher the percentage, the better the carding quality. However, the degree of combing is often expressed by the number of revolutions of thorny silver (the same is true for Daxin Jinlong). 2. Carding of Xinjinlong The carding of Xinjinlong is essentially the carding effect between Xinjinlong and the cover.
Usually, the carding effect of Xinjinlong is increased by increasing the speed of Xinjinlong, reducing the distance between the cover plates of Xinjinlong, and selecting new card clothing. The carding degree of the whole carding machine can also be expressed by the number of revolutions of Daxin Jinlong when the carding machine feeds one inch (25.4 mm) of cotton lap. Increasing the flat speed, increasing the carding degree and reducing the load on the flat clothing can improve the quality of the cotton web to a certain extent.
Especially when using low-grade cotton, the effect is more significant. However, when the raw cotton grade and stiffness are high, after the flat plate is accelerated, it has little effect on the carding of the cotton bundle, but greatly increases the flower rate of the flat plate, reduces the impurity content of osmanthus, and increases the long fiber content. loss rate. Experiments and practice have proved that speeding up the cover plate only increases the impurity removal efficiency by 3%, while the loss of long fibers increases by 0.7.~1%.
Therefore, on the basis of increasing the noil impurity content, when improving the quality of the cotton web, it is more beneficial to increase the noil rate of the rear belly rather than speeding up the cover plate speed. When improving the quality of carding, Doffer believes that speed and sliver weight also have a great influence on the quality of the cotton web. In this case, according to the analysis of the above-mentioned carding situation, it is better to improve the doffer speed by yourself and alleviate some problems of the students.
3. Whether the transfer risk degree of the fibers on the carding machine is uniform and stable, which directly affects the quality of the cotton web and sliver. It can also depend on the carding level of different fibers. Tight gap and strong carding are the technological guarantees for the transfer of fiber cells. The transfer problem is essentially the load on the Xinjinlong and the Doff on the card (g/unit circumference) by changing the number of output tampons to change the cylinder load and thus the Doff load.
The ratio of the doffer ratio to the cylinder and the load can be regarded as the clamping force. There is also the problem of transfer of different fibers between the licker-in and Xinjinlong, and the reversed pattern of the licker-in indicates that the transfer ability of the enterprise is not good, which not only damages the fibers, but also causes neps.