The condition of cleaning machine-picked cotton in technological processes and the possibility of increasing the efficiency of cleaning pile drums due to changing different surface sizes have been analyzed in the given article. A part from it, the quality of the fiber produced at cotton gins, the impurities of natural and technological defects in its composition were analyzed. It has been shown that insufficient efficiency of cleaning technological equipment, an increase in the proportion of impurities in the fiber has decreased in the amount of obtaining "higher" and "middle" classes of cotton. It has been established that the cleaning efficiency can be increased due to the size of the mesh surface holes of pile drums, the cleaning return of pile and sawn cotton, the impact on the cleaning efficiency of cotton work productivity has been determined. The regression equation, which characterizes their interconnections, was obtained due to cleaning relapses. When cleaning cotton, it has been shown that increasing the width of the mesh surface Holes by 8mm will cause the cotton to get dirty and cause the holes to be in a state of cotton congestion. The character of a decrease in cleaning efficiency was determined in the sequence of cleaning cotton in pile and saw cleaners. The impact of work productivity on cotton was shown in the sharp decline in the efficiency of cleaning pile drums in Sections 3 and 4. Based on the analysis of the results obtained and the size of the holes of the mesh surface of the pile drums be 8x50 mm wer recommended.

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The article provides an analysis of the proportions of different selections and industrial varieties, harvest type in terms of size and number of pollutions in the cotton. The problem of the formation of the force of binding of pollutions with the fiber was analyzed, and it was suggested that the main reason was the adhesion of the fiber to the bumps formed along the perimeter of the pollution. The experiments are based on the fact that the contamination and the contamination of cotton determined on the basis of cotton weights are the same, but their proportions are different in size. The possibility of separating fine pollutions in the cotton from the pile drums used in ginning plants was studied, and it was found that they can extract up to 93% of the total fine pollutions. Based on the comparative analysis, it was found that there is a significant difference in the weight and number fractions of pollutants by size. The effects of cotton selection and industrial variety, initial contamination, harvest type on the proportions of pollution by size. It was noted that the determination of cotton pollution by their weight ratio does not fully characterize cotton as an object of ginning, and on this basis there is a need to reconsider the issue of determining the plan of ginning of cotton based on the initial pollution.

This article is devoted to the study of the geometric dimensions of fine pollutants in cotton and the factors affecting them. Mass and quantitative fractions of small and large pollutants were compared. As an object of cotton cleaning, it was found that cotton contained different proportions in terms of the amount of fine pollutants. Although large pollutants exhibited a higher proportion of the total contamination in terms of weight, these pollutants were verified to exhibit a negligible proportion in terms of numbers. One gram of different selections and industrial varieties of cotton was obtained, in terms of contamination and harvesting type. The pollution amount was determined similar in terms of the total quantity and magnitude. The results of mathematical and statistical processing of the obtained results indicated that the number of pollutants per gram were statistically insignificant and differed among the experimental variants, but the value of the square inequality was higher. The results demonstrated that there exists a need to conduct a wide range of experimental tests in this area to determine the impact and interrelationships among all external factors on the size of the pollutant fraction and proportions.

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