page_title: Plastic extrusion
hierarchical_section_title: Plastic extrusion
caption_attribution_description: English: Plastic extruder with half of barrel removed to show screw. Sheet die attached with top half removed to show interior design.
context_page_description: Plastics extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weatherstripping, fencing, deck railings, window frames, plastic films and sheeting, thermoplastic coatings, and wire insulation.
  This process starts by feeding plastic material from a hopper into the barrel of the extruder. The material is gradually melted by the mechanical energy generated by turning screws and by heaters arranged along the barrel. The molten polymer is then forced into a die, which shapes the polymer into a shape that hardens during cooling.
context_section_description: Plastics extrusion is a high-volume manufacturing process in which raw plastic is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weatherstripping, fencing, deck railings, window frames, plastic films and sheeting, thermoplastic coatings, and wire insulation.
  This process starts by feeding plastic material (pellets, granules, flakes or powders) from a hopper into the barrel of the extruder. The material is gradually melted by the mechanical energy generated by turning screws and by heaters arranged along the barrel.  The molten polymer is then forced into a die, which shapes the polymer into a shape that hardens during cooling.
caption: Cross-section of a plastic extruder to show the screw
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