Method and apparatus for the control of injection molding
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United States of America Patent
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Oct 30, 2001
Grant Date -
Aug 23, 2001
app pub date -
Feb 27, 1998
filing date -
Feb 27, 1998
priority date (Note) -
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Abstract
This invention relates to a method and apparatus for the control of injection molding and, in particular, for determining a suitable time for transfer from injection velocity control to packing pressure control. The invention uses a derivative of, preferably the nozzle pressure, and inputs this to a fuzzy inference system. The fuzzy inference system uses said rules and knowledge to provide a suitable transfer time as an output. It is preferred that the sample pressure is filtered prior to calculation of the derivative.
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