Mini Extruder: Layered Moineau based Pump plus Conical Auger

Following our work on "Layered Moineau based pump: Model 131313" by @SciFabLab -see: http://www.thingiverse.com/thing:1840527 we present the first prototype for a Mini Pellet Extruder ¬easy to built, assemble and clean, for pumping a controlled quantity of viscous material in vertical direction -see video: https://www.youtube.com/watch?v=Y3TjkRAStZk and more details at: https://osf.io/preprints/8yyms (see follow up and also improved version at http://www.thingiverse.com/thing:1915577)

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