Open-source grinding machine for compression screw manufacturing

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openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-09
Major/Subject
Mcode
Degree programme
Language
en
Pages
27
1-27
Series
Inventions, Volume 5, issue 3
Abstract
Some of the most promising distributed recycling and additive manufacturing (DRAM) technical systems use fused particle fabrication (FPF) or fused granular fabrication (FGF), where compression screws force post-consumer waste plastic through a heated nozzle for direct 3D printing. To assist the technical evolution of these systems, this study provided the details of an invention for a low-cost, easily replicable open-source grinding machine for compression screw manufacturing. The system itself can be largely fabricated using FPF/FGF following the self-replicating rapid prototyper (RepRap) methodology. This grinding machine can be made from a cordless cut-off grinder and < $155 in parts. The new invention is demonstrated to be able to cut custom screws with variable (i) channel depths, (ii) screw diameters, (iii) screw lengths, (iv) pitches, (v) abrasive disk thicknesses, (vi) handedness of the screws, (vii) and materials (three types of steel tested: 1045 steel, 1144 steel, and 416 stainless steel). The results show that the device is more than capable of replicating commercial screws as well as providing makers with a much greater flexibility to make custom screws. This invention enables the DRAM toolchain to become even more self-sufficient, which assists the goals of the circular economy.
Description
Keywords
Angle grinder, Compression screw, Cylindrical grinding machine, Grinding, Grinding machine, Material extrusion, Open hardware, Open-source appropriate technology, Open-source hardware, Recycling
Other note
Citation
Franz , J & Pearce , J M 2020 , ' Open-source grinding machine for compression screw manufacturing ' , Inventions , vol. 5 , no. 3 , 26 , pp. 1-27 . https://doi.org/10.3390/inventions5030026