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Pellextruder2: Low-Cost Open-Source Moineau Extruder for Volumetric 3D Printing from Plastic Pellets
Pellextruder2: Low-Cost Open-Source Moineau Extruder for Volumetric 3D Printing from Plastic Pellets

Pellextruder2: Low-Cost Open-Source Moineau Extruder for Volumetric 3D Printing from Plastic Pellets

It is now possible to buy a huge variety of plastic filaments for 3D printing, but even though they have become progressively cheaper, industrial plastic pellets cost a fraction (~1€/kg, roughly 10%) of the filament. The availability of filament in developing countries is still difficult, while there is a huge amount of plastic waste (i.e. PET) that could be used for this purpose after shredding.
Coupling on the same axis an Auger screw with a “Moineau” progressive cavity pump and heating it all through the cylindric enclosure, it is possible to achieve a controlled volumetric extrusion optimal for 3D printing. The plastic pellets enter the Auger screw and while being melted are moved forward into the cavities of the Moineau pump, then pushed proportionally to the amount of the rotation into the extrusion nozzle (volumetric control).
Italy


Pellextruder2: Low-Cost Open-Source Moineau Extruder for Volumetric 3D Printing from Plastic Pellets

Carlo Fonda, Enrique Canessa, Marco Baruzzo, Erika Ronchin, Gaya Fior, Sara Sossi

The authors of the project are working for the ICTP Scientific FabLab in Trieste and they enjoy using their (little) free time to invent new solutions -following the maker philosophy- to some of the big and small problems of the world at large, like for example how to recycle plastic, how to use new models of 3D printers in remote and poor areas to build large objects in a short time and with minimal resources.


Stand B13 (pav. 3) - ICTP SciFabLab - Trieste


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Data updated on 2019-10-20 - 5.32.19 pm