Features of the technology for producing combed yarn from medium-fiber cotton

¹ Tashkent Institute of Textile and Light Industry, Tashkent, Uzbekistan
² Namangan Institute of Engineering and Technology, Namangan, Uzbekistan

^* Corresponding author: sherzod.korabayev@gmail.com

Abstract

The article examines the features of the technology of production of re-combed yarn from medium fiber cotton selection varieties. The experiments were carried out under production conditions on the Rieter E-66 combing machine. To determine the optimal technological parameters of the machine, a full factorial experiment was conducted to determine the unevenness of the 1-meter-long braid, the output of recombing tension, the staple length of the fibers in the strand, and regression equations were obtained. According to the results of the full-factor experiment, the improvement of the quality parameters of the recombing machine was achieved when the speed of the comb drum of the combing machine is 400 min-1, the distance between the lower jaw of the clamps and the comb segment is 0.2 mm, and the distance between the lower jaw of the clamps and the separating cylinder is 16.5 mm. According to the theoretical and experimental evaluations, using the optimal parameters of the high-speed combing machine, the cotton re-combed from the cotton fibers meeting all requirements was produced on the G-3 warped spinning machine of the Rieter company, with a drawing density of 14.8 tex (Ne 36). As a result of improving the physical and mechanical quality of spun yarn, the number of yarn breaks that damage 1000 yarns has decreased by 25%, and machine productivity has increased.