The Filamaker shredder produced by German inventor and programmer Marcus Thymark or as we know him @Hans_12 is specifically produced to tear up your old prints. This of course is super useful if you plan on recycling your old prints with for instance a Filabot extruder.
Last week it arrived at our HQ so I decided to start testing it out. First though I figured a couple of simple modifications would make the shredding process a lot easier. I bought a small table and cut a hole in the middle of it. Then I screwed the Filamaker on top of the hole and printed a holder so that a box can be placed at the bottom of the table to collect the shredded pieces.
So next up, some actual shredding. The shredder grinds the plastic between its blades and in this way cuts it into smaller pieces.
Some first shredding rounds show that the Filamaker can definitely reduce the size of some of the fiercest Marvins. However one thing we will still need to find out is whether the pieces are shredded small enough to be able to use them in the Filabot. But those are worries for a later post
The last thing I tried was shredding the same shape with different infill ratio’s. This shows:
100% infill ratio = Nearly impossible
80% infill ratio = Very difficult
50% infill ratio = Manageable to shred and provides nice chunks of shredded plastic
20% infill ratio = Easy to shred but gives pieces that are more like flakes than like pellets so this might cause issues when extruding.
So it seems that the Filamaker has no trouble shredding anything between 0 and 50% infill ratio. For my research I will first print objects that are then shredded and since I want to shred as much material as possible I will be printing with 50% infill ratio.
My question at the moment is what shape is best to print if you want to make the most consistent shredded pieces for use in a Filabot extruder. If anyone can help me with this I’d love to hear from you!
That’s all for now but more experimenting will undoubtedly happen soon!