In a single-barrel extrusion system, the operator observes that the extrudate (made of polyethylene, PE) is being processed at a speed of 0.5m/s with a final diameter of 0.5cm. The screw pitch is 1cm, the barrel diameter is 1.5cm, the barrel length is 10cm, the screw channel depth is 0.3cm and the screw is rotating at 10RPM. a. Find the head pressure on the die given that the polymer has a viscosity of 300Pa.s. Note that the swell ratio of PE is 1.2. b. Find the length of the die opening.
In a single-barrel extrusion system, the operator observes that the extrudate (made of polyethylene, PE) is being processed at a speed of 0.5m/s with a final diameter of 0.5cm. The screw pitch is 1cm, the barrel diameter is 1.5cm, the barrel length is 10cm, the screw channel depth is 0.3cm and the screw is rotating at 10RPM. a. Find the head pressure on the die given that the polymer has a viscosity of 300Pa.s. Note that the swell ratio of PE is 1.2. b. Find the length of the die opening.
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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In a single-barrel extrusion system, the operator observes that the extrudate (made of polyethylene, PE) is being processed at a speed of 0.5m/s with a final diameter of 0.5cm. The screw pitch is 1cm, the barrel diameter is 1.5cm, the barrel length is 10cm, the screw channel depth is 0.3cm and the screw is rotating at 10RPM.
a. Find the head pressure on the die given that the polymer has a viscosity of 300Pa.s. Note that the swell ratio of PE is 1.2.
b. Find the length of the die opening.
Transcribed Image Text:Screw
Barrel
↓
de
-Pitch p
W₁
Direction of melt flow
Channel
-Flight
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