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eried

ABS 3 mm extruder prototype

by eried Feb 12, 2012
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A cheap source for the auger would be a plant bulb auger/drill bit. They are designed to drill a 28mm (1 1/8") x 450mm (18") hole to plant tulip bulbs. They can be had for ~$10.00 and found at graden centers.

Looks much better than the drill bit (I have to see the availability of that part here, the drill bit 22 mm cost me 22 usd, not as expensive as I expected) but not very efficient displacing the pellets backwards

Very nice design!

You can probably get away with air cooling with a computer fan and spooler - our filament quality with the recyclebot with HDPE was fine. http://www.thingiverse.com/thing:12948http://www.thingiverse.com/thi...

I love the use of a drill that opens it up again to more people and has the great multiuse feature.

RecycleBot v2.2
by jpearce

wow! recyclebot looks nice! don't know how I didn't find it while researching :-[

You will need a smaller die to achieve 3mm final filament diameter. From working with FEF (freeze-from extrusion fabrication) systems I would guess a die of 2.8mm by 2.5-3mm long should result in a rather even filament.

For cooling you could run it through a cold box such as a cheap refrigerator or a cooler of ice with a hole through both sides. I do not see a peltier cell working all that well because it may cool one side of the filament more than the other and cause distortion.

Nice simple system I like it.

Oh! thanks for the hints, it is just experimentation, as I still don't test the peltier cell for temperatures and efficiency (unbranded very cheap ones from eBay) I just added it to the model for representation purpuses.

I think the ideal design is to get 2 peltier cells, everything glued with ceramic thermaltake compound with the output tube inside and heatsinks on both hot sides of the cells.

Someone else is taking this initiative with a plastic recycler called Filabot

http://www.kickstarter.com/projects/rocknail/filabot-plastic-filament-makerhttp://www.kickstarter.com/pro...

I'm glad to see that more people besides him are doing things to create their own plastic filament.

Thanks for that link, I'd buy one in a second...