Open Source Waste Plastic Granulator

[Frank S]

After reading your extensive collaborative study I see a couple of areas where discrepancies in the design may exist.
first off the feed area appears form the cad drawing pictures to be the cylinder in which the guillotine blade system is contained appears to be dis-portioned relative to the screen area additionally in the picture the design appears to only show the cylinder as being a half circle This would appear to reduce the efficiency of the machine while allowing cut materials to be thrust back out of the feed chamber.
It would seem to me at least that the containing cylinder encompassing the shaft and rotating blades should have at a minimum of 270° to 330° of the circumference contained. while the screen area would be better having at least 180° of perforations.
Since all granulation of this design occurs due to centrifugal movement of the cut materials being sheared by the perforations in the screen I would surmise the material the screen is made of should be hardened.
These are just a couple of observations which are only one man's outside opinion unless I were to construct the exact design incorporating both yours and my ideas I would not have sufeincent data to confirm or deny my observations.