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Some Pictures of Screw Extruder Number 4 that jason has been working on (finished Wednesday 3rd June) - it now has separate sections that can be insulated if needed. At the moment it has a 2.75mm Dia Die. It Works really well. It does needs a thrust Bering for the end because it wearing through the metal but thats an easy fix.

Heres the latest extruding by jason (Friday 4th June) he got the gravity “Pulling” out of the die working really well and the material was a very consistent size,when the material going into the hopper was all well sized. by using a fan under the front of the die has increased the cooling of the material as it exits the extruder.

He has tried a variety of plastics, HDPE, Milk bottle, milk lids, Plastic bags (by far the funnest to watch and do), Clear Bottle PET and White Abs
So far have tried Blue Green Orange White and Clear and a few different mixing s. Also have some yellow for the next extrude session. The spool in the bottom picture is around 2.5m.