Consider an extruder in which the barrel diameter = 4.5 in and length = 11 ft. The extruder screwrotates at 60 rev/min; it has channel depth = 0.35 in and flight angle = 20°. The plastic melt has ashear viscosity = 125 x 10 lb-sec/in'. Determine: (a) Qmax and pmusi (b) the shape factor K, for acircular die opening in which Da = 0.312 in and La = 0.75 in; and (c) the values of Q and p at theoperating point.

Answered: Image /qna-images/answer/3b57521d-8237-4812-b35f-c6071efc25f0.jpg

Answered: Consider an extruder in which the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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An extruder barrel has a diameter of 110 mm and a length of 3.0 m. The screw channel depth = 7.0 mm, and its pitch = 95 mm. The viscosity of the polymer melt is 105 Pa-s, and the head pressure in the barrel is 4.0 MPa. What rotational speed of the screw is required to achieve a volumetric flow rate of 90 cm3/s?
I only need the answer to question 2. I provided the correct answer for question 1 1)An extruder barrel has a diameter of 4.0 in and an L/D ratio of 28. The screw channel depth = 0.25 in, and its pitch is 4.8 in. It rotates at 60 rev/min. The viscosity of the polymer melt is 100 x 10-4 lb-sec/in2. What head pressure at exit is required to obtain a net volume flow rate of 150 in3/min? Assume that you are extruding 1/2 in PVC pipe (schedule 40) using the conditions above. -2193 lb/in2 2) How long would it take to extrude a 30 foot section? Be sure to note in your solution where you got your dimensions for the PVC pipe.
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