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Sorry, this project has been put on the backburner for a while but I will be posting big updates sometime in December. Just a quick update - I have successfully shredded most household plastics and produced fresh filament with quite decent print quality. PLA has been the only plastic with some issues because of its hardness. What really piques my curiosity is a powder extruder which eliminates the filament spool altogether. I have hated the filament and spool concept since my first 3D print over 5 years ago. Hopefully the DIY community starts work in earnest on a hybrid of the filament extruder and print hotend using ptfe tubing in bowden configuration to lighten the x-carriage and eliminate the ridiculous filament and spool.
I have stripped the machine and looking into some immediate performance upgrades. The plan right after is to grind kitchen plastics like PP(tupperware, milk and juice jugs), PET(soda and water bottles) and others like pe, ldpe, hdpe. I have tried the liquid nitrogen technique and its a lot of fun but definitely not a smart idea at home. But its just so much fun. All the home plastics will definitely need to be washed, dried and cut into smaller chunks first. Smaller crushable pet bottles should be simple to grind. I'll post some updated videos shortly
Just search for: AmazonBasics 12-Sheet Cross-Cut Paper, CD, and Credit Card Shredderon Amazon. It should show up. If not, I honestly think any cross cut paper shredder should work. Ideally, try to get a free/junk one. All we really need are the rotors.
$50 Plastic Shredder / Grin...View Instructable »
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