Plastic Extruder

This is a plastic extruder designed in significant detail. However, I have never worked with a plastic extruder and this entire design is made from what I know about extruders academically and with a lot of my imagination. The mold is particularly imaginative, though difficult to manufacture. The above means that this is not an exact model of an extruder machine. Rather, something I made to help me understand it myself. In that sense, I would like anyone that has any suggestions or observations about the design to please put them forward. P.S. All the mechanical components (fasteners, rivets, bearings) are from the Solidworks Toolbox. P.S.2 The gold colour inside the barrel and on the blades is supposed to be TiN thin film deposition.