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The dynamics of peak cavity pressure in injection molding
Author(s) -
Haber A.,
Kamal M. R.
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760271810
Subject(s) - materials science , molding (decorative) , accumulator (cryptography) , mechanics , injection molding machine , pressure sensor , control theory (sociology) , composite material , thermodynamics , mathematics , physics , computer science , control (management) , mold , algorithm , artificial intelligence
Abstract The modification of the injection‐molding machine, incorporating additional filters, an accumulator, and a servovalve, was shown to reduce the peak cavity pressure variations, in as much as the variations using the microprocessor system were random in comparison to the variations using the normal mode of operation, which exhibited nonstationarity and autoregressive behavior. If the peak hydraulic pressure could be randomized, then the peak cavity pressure variations also would be random. No closed‐loop control would be needed to control the peak cavity pressure.