Plastic Extrusion Case Study

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AMITY UNIVERSITY, UTTAR PRADESH FACTORY OPERATIONS WITH SPECIALIZATION IN REFRIGERATION. TECHNO ELECTRONICS Ltd. Submission to: Ms. Richa Sharma Asst. Professor ASET Compiled by: Parth Shukla A2305412164 B.Tech MAE 2012 - 2016 7 MAE – 3X CERTIFICATE This is…show more content…
Extrusion produces material such as pipe or tubing, weather-stripping, fencing, plastic films and sheeting, deck railings, window frames, thermoplastic-coatings, and wire insulation. In the plastics extrusion, the raw compound material is usually in the form of nurdles, small beads which often called resin, that are gravity fed into a top mounted hopper then into the barrel of the extruder. Additives like colorants and U.V. inhibitors (liquid/pellet form) are often used and which then can be mixed into the resin precede to arrive at the hopper. The process has very much in common with plastics injection molding from a point of the extruder technology though it may differs in that as it is usually a continuous process. While pultrusion be capable of offering many same profiles in continuous lengths which comes usually with added reinforcing, this is achieved with pulling the finished result out of the die instead of extruding a typical polymer melt through the die. A large number of polymers are used in the production of pipes, rods, rails, plastic tubing, seals, and sheets or films. For example, ABS, HIPS…show more content…
While most of the polyurethanes are thermosetting polymers that don't melt when heated, thermoplastic polyurethanes are also available. PU polymers are traditionally and generally formed by reacting di- or polyisocyanate with an apolyol. Both the iso-cyanates and polyols used to make polyurethanes have on average two or more than two functional groups per molecule. Some notable recent efforts have been dedicated to minimize the use of iso-cyanates to synthesize polyurethanes, because the iso-cyanates elevate severe toxicity issues. Non-iso-cyanate based polyurethanes (NIPUs) have just been developed as a new class of polyurethane polymers to alleviate health plus environmental concerns. . Polyurethanes are used for the manufacturing of non-flexible, high-resilience foam seating; microcellular foam seals and gaskets; durable elastomeric wheels and tires ; automotive suspension bushings; rigid foam insulation panels; electrical potting compounds; high performance adhesives; surface coatings and surface sealants; synthetic fiber carpet underlay; hard-plastic parts; condoms; and

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