here the promised grinder. Please find more in the precious plastic open source library. We maintain drawings, etc… there.
Long story short, this addon, component or stand-alone machine – depends on how you build it – enables you to post process your v3 shredder flakes down to 1-2 mm. This results in better melting times but also significant overall quality for injection, extrusion and compression (you can speed it up then too). Since the flakes are that small you can also print it (I know only of PET as suitable material).
From our tests, this will also lower the horrifying energy consumption for the compression drastically; also resulting a better sheets/tiles.
License : OpenHardware License
Release – date: 10th of October – 2019, as v4 companion or v3.0 follow-up
Motor speed, recommended 700 – 1200 RPM but you can use the shredder motor at 60 – 90 RPM as well.