That worked, albeit only with basically powdered PLA. Later versions of the extruder used a plain galvanized woodscrew soldered to the end of a threaded rod, which worked with chunkier plastic bits.

and polylactic acid (PLA), only have a very narrow window of time in which they can be heated, and air pockets can form. This production level microcellular extrusion foaming technology provided ...

Second, everything needs to be very clean — no cross-contamination with plastics other than PLA, no metal bits in ... has access to a fancy filament extruder like his, so this may not be ...

A mini-injection molding machine was then used to shape the composites, transferring the melt from the extruder die into the mold under 8 bar pressure at room temperature. A control PLA/PBS ...