What if you put your PET waste into the 3D printer instead of the recycling bag?
Is that possible?
Can we outline what is nessessary to build this machine? And why it is not available yet?
This is a wonderful idea! I love it so much I re-posted it on G+ to get more attention. We have to research how to make that filament out of chopped plastic. To chop the plastic we can use a coffee grinder but with a larger blade. Or a shredder type rollers. Then the plastic can go into a pressurized heating cylinder where it melts. Then we can push compressed air inside and open up a nozzle to get the filament and blow cool air on it to cool it down and spool it. Then it can be fed into the 3D printer. Hmm, it seems complicated, a lot of motors and moving parts, heating elements and cooling fans... A lot of electricity involved in the process. But to me, it's worth researching and building such a machine.
... pretty complicated, even a two step process is.
The RepRap like printers are all working on the principle of pushing plastic in form of filament trough the heated nozzle and it is working well and keeps things pretty simple.
So you would need a way to produce the filament and that has to have a difference of max +-0.2 mm in diameter along it's length. While some attempts have been made none made it to a usable state so far. There are problems grinding the plastics to small bits, finding the best mechanincs to push it trough trough the filament forming nozzle, having it keeping it's shape afterwards, spooling it up.
This is why nothing exists so far :)
Who knows, in the future this may indeed be possible. I would definately keep an open mind.
well, that is a difficult task. first you have to chop and grind the plastic and then form a kind of filament. My idea would be a 2-step processing by grinding and melting the plastic in the first step and then pull/squeeze the filament out of the molten plastic. After cooling down it can be directly go to the extruder of the 3D printer to get heated again.
For a one-step processing it would need some kind of cylinder to squeeze the molten plastic directly from the pool into the nozzle. But to answer your question...YES it would be possible...there are no impossible things on LMR ;-)
a reprap requires fairly consistent diameter. It would take a good deal of tech to get a consistent diameter of filament.