International Journal of Engineering Inventions
Keywords: Defects, Preventions, Yarn Manufacturing Departments, Textile Industry
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Defects, Preventions, Yarn Manufacturing Departments, Textile Industry I. INTRODUCTION This paper is related to textile industry especially to Yarn manufacturing process. In this paper identifies the different problems occurring during manufacturing of yarn in different processes, it also highlights the critical success factors which are most important in quality point of view. It also describes the preventive action against any failure. In order to tackle the complex problems, the first thing is to construct a well-structured problem formulation ―a good representation‖. There are different types of problem formulation like “What” what kind of problem that occurs during the yarn manufacturing process and its effects on quality “Why” why the problems create during process “How” how to solve the problems from different actions and implementation some rules in the process In this paper describes different problems in quality perspective in different departments and identifies the reason for these problems due to carelessness of employees during manufacturing. Training of employees and preventive action against any failures in the department is necessary for any organization.[1, 2] Fig. 1 Diagram of group member’s idea Yarn consists of several strands of material twisted together. Each strand is, in turn, made of fibers, all shorter than the piece of yarn that they form. [3] These short fibers are spun into longer filaments to make the Analysis on the Defects in Yarn Manufacturing Process & its Prevention in Textile Industry www.ijeijournal.com Page | 46 yarn. Long continuous strands may only require additional twisting to make them into yarns. Sometimes they are put through an additional process called texturing. The characteristics of spun yarn depend, in part, on the amount of twist given to the fibers during spinning. A fairly high degree of twist produces strong yarn; a low twist produces softer, more lustrous yarn; and a very tight twist produces crepe yarn. [5] Yarns are also classified by their number of parts. A single yarn is made from a group of filament or staple fibers twisted together. Ply yarns are made by twisting two or more single yarns. Cord yarns are made by twisting together two or more ply yarns. Almost eight billion pounds (3.6 billion kg) of spun yarn was produced in the United States during 1995, with 40% being produced in North Carolina alone. Over 50% of spun yarn is made from cotton. Textured, crimped, or bulked yarn comprised one half of the total spun.[6, 7] Textured yarn has higher volume due to physical, chemical, or heat treatments. Crimped yarn is made of thermoplastic fibers of deformed shape. Bulked yarn is formed from fibers that are inherently bulky and cannot be closely packed. Fig. 2 Diagram of yarn manufacturing process Yarn is used to make textiles using a variety of processes, including weaving, knitting, and felting. Nearly four billion pounds (1.8 billion kg) of weaving yarn, three billion pounds (1.4 kg) of machine knitting yarn, and one billion pounds (450 million kg) of carpet and rug yarn was produced in the United States during in 1995. [7,9,10] The U.S. textile industry employs over 600,000 workers and consumes around 16 billion pounds (7 billion kg) of mill fiber per year, with industry profits estimated at $2.1 billion in 1996. Exports represent more than 11% of industry sales, approaching $7 billion. The apparel industry employs another one million workers. [23] tải về 1.28 Mb. Chia sẻ với bạn bè của bạn:
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