The words contained in this file might help you see if this file matches what you are looking for:

...Application note plastics extruder degassing edwardsvacuum com extrusion is a common process used to create objects of fixed cross sectional profile using extruders the raw material usually in pellet powder or bead form conveyed by screw heated barrel plastic melted friction and heat viscous liquid which then forced through die into its final shape vacuum applied before remove trapped gases can voids other imperfections product after for cooling forming feed hopper pellets heaters shaping items such as pipes tubing thermoplastic yarn window frames films sheet wire cable coating well polymer film produce above mentioned turning molten extrudate are manufactured structural parts types categorised number screws they hold design operation vented single serve different purposes quite often combination variable geometry high l d ratio these specific excellent mixing build pressure melt so that it be extruded injected mould most plasticising bring transition metering them ffeed eed ttrransiti...