Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Cavity pressure is an important process parameter for injection molding control. However, the nonlinear and time-varying behavior of cavity pressure cause some difficulties in implementing a control system based on commonly used linear, time-invariant design strategies. In this work, the nonlinearity and time-varying characteristics of cavity pressure are examined for the mold filling phase. A self-tuning controller has been developed, implemented, and tested for both regulating and tracking purposes over a wide range of conditions. It is found that the proposed control system can automatically adapt itself to different operating conditions, yielding quite accurate control. © 1994 John Wiley & Sons, Inc.
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