(USCS units) An extruder has a barrel diameter of 4.0 inch and a length of...
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(USCS units) An extruder has a barrel diameter of 4.0 inch and a length of 7ft. It has a screw channel depth of .26 inch and a flight angle of 20 degrees. The extruder screw rotates at 75 rev/min. The polymer melt has a shear viscosity = 65X10^-4 lb-sec/in^2. Specific gravity of the polymer = 1.2 (the density of water = 62.5 lb/ft^2). A U-shaped cross section is extruded at a rate of 0.11 lb/sec. (a) Find the equation for the extruder characteristic. (b) Find the operating point (Q and P), and (c) the die characteristic that is indicated by the operating point.
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