This is a waste plastic extruder. Basically what that means is that you put old plastic bottles in the bin, it grinds them up, liquefies them, and then turns them into “ink” for your 3d printer.
I personally love this idea, and would like to see if we could also make one for other materials – once 3d printers can handle them, of course. Good stuff!
Schematic, 3d print files, etc.: RecycleBot_v22