question archive (USCS units) An extrusion operation produces continuous tubing with outside diameter = 2
(USCS units) An extrusion operation produces continuous tubing with outside diameter = 2
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(USCS units) An extrusion operation produces continuous tubing with outside diameter = 2.0 in and inside diameter = 1.8 in. The extruder barrel has a diameter = 4.0 in and length = 12 ft. The screw rotates at 50 rev/min; it has a channel depth = 0.30 in and flight angle = 18°. The head pressure has a value of 380 lb/in2 and the viscosity of the polymer melt is 80 x 10?4 lb?sec/in2. Under these conditions, what is the production rate in length of tube/min, assuming the extrudate is pulled at a rate that eliminates the effect of die swell (i.e., the tubing has the same OD and ID as the die profile)?
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Answer:
Using formula discharge rate and entrance frate have been determined then, difference of which will vigen net volume rate coming out, which in turn given length of tube per second.
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