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1- Calculate the amount of material in m3/sec that will flow through the die where the orifice diameter is 74 mm, the die has a land length of 0.87 mm, the pressure across the die is 4,636 Pa, and the viscosity is 61 Pa:s. 2- Calculate the amount of material in cm3/s that will flow through a die where the orifce radius is 4.4 mm, the die has a land length of 4.8 mm, the pressure across the die is 4,940 Pa, and the viscosity is 22 Pa:s 3. An extruder has a barrel diameter of 3.31 inches and a length of 70.9 inches. The screw has a channel depth of 0.17 inches, a flight angle of 19.6 degrees, and it rotates at 52 RPM. The material being extruded is low density polyethylene. At the present settings, the volumetric flow rate of the polymer melt is 2.25 in3/sec and the head pressure is 587 1b/in2. Determine the viscosity of the polyethylene under these operating characteristics in terms of lb:sec/in2.
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