Aspects of devices in which plastic is extruded for a three dimensional printer. Novel designs for components of a high performance fused filament extrusion head are disclosed within, a novel “heat-break” and wear resistant “feed tube”. The feed tube serves as a path for filament as it is fed from the cold end into the hot end. The heat-break rigidly connects the cold end to the hot end while providing resistance to the flow of heat.
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Thompson Johnson, Arthur, "Wear Resistant Fused Filament Extrusion Head", Technical Disclosure Commons, (January 03, 2023)