Consider an extruder in which the barrel diameter = 4.5 in and length = 11 ft. The extruder screw rotates at 60 rev/min; it has channel depth = 0.35 i
Consider an extruder in which the barrel diameter = 4.5 in and length = 11 ft. The extruder screw rotates at 60 rev/min; it has channel depth = 0.35 in and flight angle = 20°. The plastic melt has a shear viscosity = 125 x 10-4 lb-sec/in2 . Determine: (a) Qmax and pmax; (b) the shape factor Ks for a circular die opening in which Dd = 0.312 in and Ld = 0.75 in; and (c) the values of Q and p at the operating point
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