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Plastics Extrusion | Plastics Technology Extrusion is a continuous process through which parts of a fixed cross-sectional profile are made Material is fed through a hopper into an extruder, essentially a rotating screw surrounded by a heated barrel, where it is mixed, melted and pumped through a die The die gives the part its shape Types include film extrusion, sheet extrusion, pipe, profile and tubing extrusion
Pipe, Profile and Tubing Extrusion | Plastics Technology Pipe is formed when plastics is extruded through a round shaping die, cooled in a water bath, and either cut and coiled Used in manufacture of medical tubing; PVC pipe; HDPE pipe; siding; plastic decking; plastic fencing; window lineals
Film Extrusion | Plastics Technology Film extrusion is divided into two subcategories: cast film (flat film) and blown film In cast film extrusion, hot plastic is extruded through a flat, slit die onto a polished chill roll where it is quenched, pulled to a second set of rolls to cool the other side, then wound In blown film extrusion, plastic is extruded into a cylindrical die, then inflated to form a bubble, which is cooled
Extrusion: Start Up and Shut Down Properly | Plastics Technology Extrusion: Start Up and Shut Down Properly A key goal during startup and shutdown of the extruder is to prevent degradation of the polymer left in the extruder and downstream components such as screen changers, adapters, and dies
Sheet Extrusion | Plastics Technology Sheet Extrusion Technology is designed to be used in conjunction with our 9-lesson single screw extrusion course It provides an overview of sheet extrusion technology ranging from parts and operation, to controlling plastic flow in the die, to troubleshooting the sheet extrusion line
Stop Those Gels! | Plastics Technology Gels are an unsightly but common problem in single-screw extrusion They can be large or small, hollow or solid, clear or discolored They appear in sudden “showers,” discrete stripes, or randomly dispersed By identifying the specific type of gel and circumstances of its appearance, you stand a much better chance of tracking down and fixing the cause—whether it stems from problems in
PET Processing - Extrusion | Plastics Technology In extrusion, most PET is processed into sheet for food packaging applications The PET sheet or PET film is thermoformed into products such as drinking cups, trays, clam shell containers and the like
Extrusion Training Courses | Plastics Technology Extrusion Training Knowledge CenterSingle Screw Extruder This program uses state-of-the art animation technology to teach the fundamentals of single screw technology, including parts and operation, plastics used for extrusion, extruder controls, safety procedures, troubleshooting and more Also available in Spanish
Understanding Grooved Feed | Plastics Technology Understanding Grooved Feed U S processors still have some catching up to do when it comes to getting the most out of grooved-feed extruders But decades of European experience offer lessons on how to use grooved feeds to run even resins like TPU, nylon, and PET