Table 1.

Dimensions and geometrical design parameters of the extruder

Symbol	Description	Value
dbarrel	the inner diameter of the barrel	12 mm
hchannel	mean distance from the screw root to the barrel wall	1.2 mm in the beginning and 1 mm at the end
hclearance	clearance between barrel and extruder screw	0.05 mm
wchannel	channel width	4.00 mm
wpitch	the pitch of the extruder screw	6 mm in the beginning and 5.6 mm at the end