Filament production

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Ample work has been done on filament extrusion. Because of the potential of recycling material and/or using pellet source material, and cost saving through that. (Printing_Material_Suppliers contains a list of sourcing for filaments.)

This page list methods of making filaments by method. There are at least two other pages. GranuleExtruder and Granule Extruder Team(mostly links). Probably there is a need to separate the abstract from particular incarnations of the idea.

Q: is it true, and to what limit, that larger filament diameters make the filament cheaper by weight?(possibly depending...)

Q: difference between PLA, ABS and other?

Contents

Methods

All methods i have seen feed pellet/ material into some kind of hot end where it melts. One potential problem of course is the heat creeping from the hot end and clogging everything when things cool down.

Auger vertically in the container with material

I suppose the advantage might be that gravity is less likely to deform things, making an slightly oval cross section. Cases are:

Auger horizontally with hopper

AFAICS this idea seems to have been applied to actually make filament more.

  • "Omnom is a benchtop recycler that transforms plastic into 3D printer filament."[1]

Piston based

Basically a piston moves back and forth and pellets fall in.

Centrifugal

leeds.ac.uk paper(pdf)

plastic filament from recycled plastic

plastics from starch

I hear that "Brandon121233" makes plastics from starch. "Make Potato Plastic!" and "Starch Plastic 2.0- Pressure Cooker Hacking". What modifications, if any, are required to use either plastic in a standard Mendel RepRap? Is there a page anywhere on the RepRap wiki that discusses how to make plastic out of stuff that can be grown locally? --DavidCary 16:42, 14 March 2013 (UTC)

The Wealth Without Money and PhilosophyPage and Printing materials pages briefly mention making plastic PLA out of stuff that can be grown locally. Where can I find more details?

Further reading