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...Jetir march volume issue www org issn root cause analysis of extrusion process defects in pvc pipe manufacturing shrikrishna b pawar sarfraz ali quadri dr dhananjay dolas pg student m tech mfg mgm s jnec aurangabad ms india mechanical engineering department abstract plastic industry produces reasonable amount waste during production with major contribution scrap generated the products and due to has different such as voids gels specks etc this study is conducted identify product pipes develop systematic approach for effective trouble shooting causes most frequently occurring identified by pareto will be helpful increasing life reduce index terms introduction a high material melted application heat extruded through die into desired shape cylindrical rotating screw placed inside barrel which forces out molten takes according cross section schematic shown figure form pellets or granules gravity fed from top mounted hopper additives colorants ultraviolet inhibitors liquid pellet can mixed ...