we wanted to share some of our creations with you. It takes only a few minor modifications to have a small and portable system which provides a shredder, an injection, and the extrusion. The trick is to bolt all down to a solid metal plate (30 cm x 60 cm x 1.5 cm). That metal plate holds all together is to be mounted on a corner of any robust table. To switch between injection and extrusion you need only a solid joint (takes a day with the welder & grinder) as seen below in the pictures.
You can save around 200 – 300 euros less for the frames and about 400 Euros savings for the additional drive (reducer/inverter/motor) needed for the shredder or extrusion and another 100 Euro for additional heat-bands & controllers.
At the end you will end up with around 1000 – 2000 Euro (less if you want) in materials (but no industrial screw) and 2-3 weeks afternoon work. Tools required : grinder, welder, drill press & hand-tools for about 150-300 Euro (second-hand flee market). With a good scrap yard you could get it all done with less than 1000 Euro….
btw. I noticed that the plunger has to be shorter (5cm or so) to have a smooth plunging. the original design causes just too much jamming during injection. we’ll try to get it spring loaded but it seems there is no real space to install a spring a long the plunger, time will tell …
Here you go, the 3-in-one system (shredder box missing) :