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a) You were assigned to determine the production rate for a polymer extrusion process. The extruder is found to have a barrel diameter = 4.5 in and length = 11 ft. The extruder screw rotates at 60 rev/min; it has channel depth = 0.35 inches and flight angle = 20°. Testing a sample of the plastic melt showed that it has a shear viscosity = 125 x 10-4 lb-sec/in2. The part is a round part with diameter 0.375 inches. Studying the die and the characteristics of the polymer, it has been found that the die swell (rs) is 1.2 and a land length Ld = 0.75 in. Determine: (a) Qmax and pmax, (b) the shape factor Ks (c) the values of Q and p at the operating point and (d) the production rate in length of the bar/min.
b) Your company is manufacturing a product in which all the gears are made of metal. The manager formed a committee to study the possibility of replacing some of the metal gears with plastic ones. You have been assigned to this committee. Make a list of the questions that you would raise before making such a decision (full mark for 8 relevant and related questions). Explain.
A cart is moving along a track at a constant velocity of 5 m/s as shown. Water (? = 1000 kg/m3) issues from a nozzle at 10 m/s and is deflected through 180° by a vane on the cart.
when the governor is connected to a engine its sensitiveness formula change,why?
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Q: Determine the resultant of force system which is acting tangential to the circle of radius 1m as shown in the figure given below. Also find the direction of it and line of actio
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