VERFAHREN UND VORRICHTUNG ZUM MATERIALZUFÜHREN FÜR EINEN EXTRUDER

摘要

A polymer feed device for feeding a thermoplastic polymer to a screw extruder or the like, the feed device includes a shaft (22) and an auger (24) rotatable about the shaft(22), the auger (24) having a clearance from the shaft (22) such that when rotated about the shaft (22) it wipes polymer therefrom and feeds the polymer to the extruder or the like. Extruder systems and polymer recycling systems including such devices (with hoppers) are also described. Variable density polymer waste can be recycled using such systems. Such systems also provide greater flexibility when processing virgin polymer granules. The auger also has a clearance with the interior surface 26 of barrel 11 to allow wiping action with that surface.