
(5 pts) Continuous tubing is produced in a plastic extrusion operation through a die orifice whose outside diameter = 2...
An Extruding operation uses a polymer melt with a viscosity of 12 x 1ot and produc head pressure at the die of 800 psi from a screw with a fligh rotating at 60 rpm. The physical size of the barrel is: Length- 50.00 inches Diameter-2.50 inches Channel Depth- 0.20 inches Find the total volume flow rate of the plastic in the barrel.
An ECM operation is to be used to cut a hole into a plate of aluminum that is 12 mm thick. The hole has a rectangular cross section, 10 mm by 30 mm. The ECM operation will be accomplished at a current = 1200 amps. The specific removal rate for aluminum = 3.44×10-2 mm3-Amp/sec. Determine (a) feed rate, and (b) time required to cut through the plate. In the casting of steel under certain mold conditions, the mold constant in...