ANTEC 2016

EVALUATION OF METHODOLOGIES UTILIZED TO DETERMINE THE PRESSURE DROP THROUGHOUT AN INJECTION MOLD

Eric D. Bowersox, American Injection Molding Institute

David A. Hoffman, American Injection Molding Institute

Benjamin C. Ellis, Beaumont Development

Abstract: Two of the most common industry methods for evaluating the pressure drop through an injection mold during mold filling are investigated against an instrumented mold. The first is injection molding simulation and the second is the shop floor applied “Pressure Drop (Loss)” study method that is widely accepted as part of modern injection molding practices.  The study finds that the shop floor method can significantly misrepresent the relative pressure developed through progressive regions of a mold. Injection molding simulation was found to provide a better agreement with the actual measured mold filling pressures.

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