APPLICATION OF METHODS FOR CONTROLLING AND REDUCING YARN DEFECTS IN A SPINNING PLANT.

Аннотация

This article presents the fact that unevenness has negative properties of products produced in a spinning enterprise, often negatively affects the technical and economic indicators of the enterprise, as well as the physical and mechanical properties of yarn, the importance of testing and controlling unevenness of products in spinning production, and the causes and timing of unevenness are determined. Keywords: Unevenness, yarn quality, Dispersion, quadratic inequality, geometric irregularity, quantitative structure of the product, unevenness index Abstract: V dannoy state konstatiruetsya chto neravnomernost otritsatelnym priznakom produktsii na pryadilnom predpriyatii, it often has a negative influence on the technical and economic indicators of the predpriyatii, and also on the physical and mechanical properties of the pryaji, it is necessary to check and control the neravnomernost produktsii pryadilnogo proizvodstva, ukazyvayutsya chiny i vremya vozninoveniya predpriyatii. Keywords: Irregularity, quality of yarn, Dispersion, quadratic irregularity, irregularity of geometric structure, quantitative composition of products, indicator of irregularity Annotation: In this article, it is stated that unevenness is a negative feature of production products in a spinning enterprise, often negatively affects the technical and economic indicators of the enterprise, as well as the physical and mechanical properties of yarn, it is important to test and control the unevenness of products in spinning production, the reasons and time of causing unevenness are specified. Keywords:Unevenness, yarn quality, Dispersion, quadratic unevenness, geometric structure unevenness, quantitative structure of the product, unevenness index. Unevenness is a negative property of products produced in a spinning enterprise, often negatively affecting the technical and economic performance of the enterprise, as well as the physical and mechanical properties of the yarn. Testing and 418 “JOURNAL OF SCIENCE-INNOVATIVE RESEARCH IN UZBEKISTAN” JURNALI VOLUME 03, ISSUE 06, 2025. JUNE ResearchBib Impact Factor: 9.654/2024 ISSN 2992-8869 controlling the unevenness of products in spinning production is of great importance, determining the causes and timing of unevenness. The more yarn breaks during winding and forming in spinning machines, the higher the yarn unevenness. As a result of the increase in yarn breaks, the labor supply of workers increases, and the productivity of the machines decreases. In carding machines, the unevenness of the nature of the processing, that is, the degree of cleaning and separation of the fiber, is not the same. In addition, an unevenly combed wick is formed. If a product with uneven structure or linear density enters the stretching device of various machines, the area of the stretching force and friction force changes. If the unevenness of the yarns cooked in linear density is high, defects are formed in the appearance and structure of the fabric, as a result, the surface of the fabric becomes striped, chipped, mohair or frame-like. These defects can also be observed in knitted fabrics. If the yarns have high unevenness in terms of strength and other properties, then the woven and knitted fabrics will have high unevenness in terms of strength, elongation and elasticity. Unevenly spun yarns in terms of linear density lead to the formation of specific defects in production. Therefore, it is important to study and control the unevenness of spinning products under production conditions in accordance with the above factors. Control of the unevenness of the product in terms of linear density. The conditions imposed on the quality of spinning products are called unevenness.[1] The analysis of the unevenness of spun products is very complex. There are many types of unevenness for spun products: those that are formed in the first stage of spinning, and those that change in the subsequent stages and add new types of unevenness to them. Yarn unevenness combines several components and affects the unevenness of different stages of spinning production. Different types of unevenness are interconnected. The above factors make it difficult to distinguish the causes of unevenness. The following types of irregularities are determined by the change in specific properties along the length: linear density, unevenness in the number of fibers in the product section or unevenness in the weight of the section of different lengths, unevenness of the product in terms of its bulk density (density), unevenness in the physical and mechanical properties of the product (strength, elongation, elasticity, moisture, air permeability, electrical resistance, size of electric charges, etc.). The change in the structure of the product along the cross-sectional area and length characterizes the arrangement of elements in the product and changes in its 419 “JOURNAL OF SCIENCE-INNOVATIVE RESEARCH IN UZBEKISTAN” JURNALI VOLUME 03, ISSUE 06, 2025. JUNE Research