METHOD FOR SIMULTANEOUS CLOSED LOOP CONTROL OF GAS ASSIST AND GAS COUNTER PRESSURE IN AN INJECTION MOLDING PROCESS RELATIVE TO PLASTIC MELT PRESSURE AND PLASTIC MELT FLOW POSITION

摘要

A controller for an injection molding system is in communication with a melt flow control unit, a gas assist control unit, and a gas counter pressure control unit. The controller can effect real-time adjustments to gas assist pressure and/or gas counter pressure as a function of melt pressure or flow front position.