Recycling 3D Printer Feedstock Using Liquid Nitrogen

Home 3D printing en mass requires ecological consideration, particularly for popular 3D printing plastic ABS. Polylactic Acid (PLA) has a much better reputation as it is derived from starches available in crops such as maise. Recycling plastic at home using devices such as the Filastruder, Filabot and Lyman Filament Extruder is a solution that has emerged in recent years. An interesting and fun idea – for maker enthusiasts at home and perhaps teachers in the classroom – for grinding down old plastic for use in these machines is using liquid nitrogen, to cool PLA plastic below its brittle transition temperature.
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