Control Measures of 100-meter Weight Variation Coefficient of Spinning Yarn

The coefficient of variation of 100-meter weight of spun yarn represents the weight unevenness between the long segments of the yarn. The size of the coefficient of variation of the 100-meter weight of the spun yarn directly affects the strength of the yarn, the end of the spinning process, the appearance of the fabric, the weaving process, etc., and can reflect the quality control level in the production process to a large extent. There are many factors that affect the coefficient of variation of the weight of 100 meters of spun yarn, from the difference of equipment models to the operation level of the turner, from the cotton mixing plan of the raw materials to the stability of temperature and humidity in each process, all of which affect the coefficient of variation of the weight of 100 meters . So, how to control the coefficient of variation of the 100-meter weight of the spinning yarn? Control measures for 100-meter weight variation coefficient of spun yarn 1　　 Strengthen the temperature and humidity control of each process. Strengthen the temperature and humidity control of each process, especially the stability of the moisture regain of the cleaning and drawing process, which is conducive to further stabilizing the control of the lap weight and the sliver weight Try to minimize the control deviation to prevent the second situation mentioned above. It is mainly to control and stabilize the moisture regain of the blown cotton lap, which is conducive to the control of heavy unevenness. 2　　 Strengthen the control of the uniformity of the lap and the weight of the lap to strengthen the uniformity of the lap and the weight of the lap in the cleaning process (ie the system control of the internal and external unevenness), as well as the 1 m roll head Weight control. Strict random inspection and assessment to prevent unqualified products from flowing into the next process. The weight of the lap should be combined with the moisture regain of the lap to ensure small fluctuations in the weight of the lap.　　3　　Strengthen noil control in the carding process 　　Strengthen the uniform index control of noil in the carding process. Try to adjust the process to make the difference of noil within ±1.0%.　　4　　 do a good job in the operation standard requirements of the stopper 　　 do well in the operation standard requirements of the stopper in each process, increase the pass rate of the lap joint, strengthen the inspection force, and make it in place. Particularly strengthen the collocation of the weight and weight of the drawing process, and it is strictly forbidden to falsify.　　5　　 control the elongation of the roving 　　 control the elongation of the roving between the machines in the roving process and between the front and rear rows of rovings to reduce the difference between the stations and between the front and rear rows.　　6　　Strengthen the laboratory to control the weight deviation of each process 　　Strengthen the laboratory's control of the weight deviation of each process, especially the deviation control of the weight of the second drawing. Adopt the method of equal emphasis on the single deviation and the total deviation to adjust the change gear, and pay attention to the consistency of the draft multiple when adjusting.　 　 7 　 　 reduce the model difference of the spinning process 　 　 　 　 in the spinning process if the parking space permits, try to use the same type of spinning with the same model. When the same model cannot be guaranteed, the draft multiples of the two models can be made as consistent as possible to reduce the model difference in the spinning process, so as to achieve the goal of controlling the coefficient of variation of the spinning weight per 100 meters. Article keywords: 　 fine yarn