How to use cotton card clothing reasonably to improve yarn quality

    A186F carding machine with tin cylinder fixed cover to improve yarn quality

     Jinan Seventh Cotton Textile Factory Meng Xianrong

From the development trend of international carding machines, the cylinder fixed cover has become a part of the new carding machine. With the in-depth study and popularization of the fixed cover plate of Xilin in China, the theory and practice have proved that the fixed cover plate of the card before and after the installation of the cylinder has many advantages. This technical transformation work is an inevitable trend of technological progress. After many market investigations and combined with the actual production situation, our factory has determined to install the GFBIII type Xilin fixed cover plate produced by Wenzhou Jinfeng Textile Machinery Co., Ltd. on the A186F carding machine. After 3 months of operation, the results show that the quality of the finished yarn after the transformation is significantly improved.

Add 3 fixed cover plates in front of the cylinder, and add 2 fixed cover plates after the cylinder. After installation, the fibers can be pre-combed before entering the bushing-cover combing area, reducing the load on the work cover and reducing The deformation of the cover card clothing is better, so that the cylinder cover is better combed. The front fixed cover plate enables the fibers that have been combed by the working cover to be combed again, and the cotton net is more clear, which can effectively reduce the CV value of the yarn neps and the strands, and improve the yarn quality.

Practice has shown that the accuracy of the cotton mesh clarity is significantly improved after the installation of the fixed cover plate, and the straightness and parallelism of the fibers in the cotton mesh are good. The strong combing of the fixed front and back cover plates weakens the intersection and kinking between the fibers. This ultimately reduces the formation of potential neps in the web. The change of the impurity content of the cover plate is increased by 0.85% compared with that before the change, and the impurity removal efficiency is improved. This indicates that the lap is pre-combed when the cover is fixed after passing, which provides a sufficient carding basis for the revolving cover to make impurities, The fibers are more easily broken down in the cover work area. The number of neps in the sliver is reduced. After the cotton fiber is pre-separated by the fixed cover, it smoothly enters the working area of ​​the cover to reduce the chance of forming a neps. The distance from the inlet to the outlet of the fixed cover of the cylinder is gradually wide. The narrowing prevents the fibers from being rolled into radish or forming a neps, and the individual neps are combed and combed again when the cover is fixed by the front of the cylinder before the transfer to the doffer. The increase in the number of impurities in the sliver is caused by the pre-separation of the rear fixed cover, because the new fixed cover has a sharp tooth surface, and the strong combing breaks the large-sized impurities into a plurality of fine impurities, making it difficult to comb in the subsequent combing process. net. Practice shows that the CV value of the yarn Uster can be reduced by 0.69% after the installation of the fixed cover plate, which indicates that the fixed cover plate of the cylinder has positive significance for the improvement of the comprehensive quality of the yarn. The black knot of the blackboard is reduced by 6 pieces. The results are in agreement. In addition, the number of blackboard hybrid plasmids was reduced by 3 after the change, which seems to be in contradiction with the increase of raw strip impurities. The author believes that this is mainly because the cotton fibers are more fully combed, the sliver structure is improved, and broken in the post-spinning process. The fine impurities are caused by falling off during the yarn forming process. After the card is installed with the front and rear cylinder fixed cover, the card has improved the pre-seating ability of the card and the yarn quality is improved.

    Application practice of metal card clothing selection for high-yield carding machine

     Shandong Liaocheng New Textile Technology Consulting Service Center Liu Xin

Metal card clothing is one of the key spinning equipment and is known as the heart of the card. Its flatness, smoothness, sharpness, wear resistance and quenching uniformity (commonly known as five degrees) directly affect the carding efficiency and its stability. If the combed web has high separation degree, good sliver removal, and a clean and uniform structure, the downstream process improves product quality, reduces yarn defects, and improves the appearance of the fabric. However, in some cotton spinning enterprises, there are some disadvantages such as low ability of the needle cloth to grasp the fiber and affect the combing effect.

Therefore, textile production enterprises must do a good job in grooming card clothing: reasonable choice, pay attention to matching, in order to give full play to its combing efficiency. For the A186 series carding machine, it generally pays attention to the four matching of the licker roller, the cylinder, the cover plate and the doffer clothing. Now the FA series carding machine is equipped with the front and rear fixed cover plates and the pre-spinning plate of the licker roller. It is a matching package, but the four packages are still the basis. Based on this, since April 2008, our factory has replaced the FA224 high-yield card clothing, and has compared the domestic and foreign well-known products with combing test and achieved certain results.

In the first 6 months to 8 months of use, all kinds of matching card clothing can maintain good combing performance and the difference is very small, but with the extension of the use time, the increase rule of neps has to be continued. Observed.

Domestic card clothing has already been able to meet the production requirements under normal conditions. When the conditional factory uses the high-yield card to produce the medium-fine cotton combed knitting yarn, the cover card can be selected as GRAFSPACETOP type, and the rest can be equipped with GERON clothing, so that the cylinder clothing can reduce the number of grinding and cotton. The knot will not deteriorate too much.

    Practice of improving the process of stripping cotton roller clothing

     Qingdao Textile Machine Clothing Co., Ltd. Li Hongyu

The main function of the cotton stripping roller is to condense the cotton web into a sliver, which has a supporting effect on the stripping of the cotton web, and can ensure the complete transfer and bundle of the cotton web. Once the cotton stripping roller has the phenomenon of hanging flowers and returning flowers and cannot stop in time, it is possible to crush the doffer and the cylinder clothing, which will have certain influence on the yield and quality of the card. In recent years, all manufacturers have added advanced card sluggish self-stop devices and card-returning self-stop devices to effectively detect the returning of the triangle between the doffer and the stripping roller to prevent the card clothing from being crushed. Improve the quality of the carding. In order to fundamentally solve the problem of hanging flowers and returning flowers of the cotton stripping roller, Qingdao Textile Machinery is dedicated to the improvement of the new stripping cotton roller clothing: the thin teeth are used, and the tooth shape is designed to be isosceles. The improved tooth shape is more conducive to the transfer of cotton web, bundled into strips, increase the yield of carding; high-carbon low-alloy wear-resistant steel wire is used to improve the wear resistance of the card clothing, prolong the service life of the card clothing, and improve the quality of carding; Improve the heat treatment process, adopt on-line high-frequency annealing and special quenching process to ensure the hardness and quenching uniformity of the needle tip, the hardness is above 780HV; improve the processing precision of the punching tool, and adopt the high-speed punching process to make the tooth tip in the combing The process is in an equilibrium wear state. The special surface treatment process is adopted to smooth all the edges of the rack and the entire surface of the rack, and the surface burr is completely removed, thereby increasing the uniformity of the horizontal grip of the rack to prevent hanging flowers and returning flowers, and improving the combing precision.

In order to verify the performance of the new stripped cotton roller clothing, our company conducted several tests on the machine. First, the test was carried out on two FA203B carding machines. The talc powder was applied to the stripping roller before the test. After 24 hours of testing, the oil was removed and the talcum powder was removed. A textile factory in Fujian reflects the A186G carding machine of the factory. Because the cotton stripping roller returns to the flower, the spiral brush does not turn, the returning flower photoelectric self-stopping and other reasons cause the rolling of the doffer and the cylinder clothing. Our company immediately provided two sets of stripped cotton rollers covered with roller clothing and imported roller clothing. The two sets of stripped cotton roller clothing were installed on two vehicles and three detection points were used. The return flower photoelectric detection is carried out, and a triangular baffle is added between the doffer peeling cotton roller triangle area to prevent the returning flower from sinking, and the reliability of the return flower photoelectric self-stop detection is improved. The improved new type of roller clothing can effectively prevent the cotton stalk from hanging and returning flowers under normal production conditions, improve the quality of the sliver and increase the yield of the card. Our company immediately improved the raw materials and processing technology for the other stripped cotton roller clothing and cotton roller clothing, and the effect was excellent.