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Abstract: A mathematical model of parallel pressure stabilization
apparatus for single screw extruder is established based on the
assumptions of power law fluid and isothermal process. Numerical
solutions for the model are carried out with the help of MathCAD. The
influences of geometrical and technological parameters on the stability
of extrusion pressure and output with specified pressure fluctuant
pattern at the end of main screw are studied. The simulation results
indicate that when the screw speed of parallel pressure stabilization
apparatus is fixed, the pressure and output fluctuation of extrusion can
be compensated up to 97.6% with automatic regulation of filling length
of the polymer melt in the barrel. If the screw speed of parallel
pressure stabilization apparatus is varied corresponding to the pressure
fluctuation, the pressure and output fluctuation of extrusion can be
fully compensated.
Key words: Polymer Stabilization Extrusion Mathematical model
CLC No: TQ320.6
北京市自然科学基金资助项目(3022008).
Received 20021205, received in revised form 20030318
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