AN INVESTIGATION OF CAVITY PRESSURE TRANSDUCER POSITION WHEN USED FOR VELOCITY TO PRESSURE TRANSFER WITH VARIOUS INJECTION MOLDING PROCESS STRATEGIES

摘要

The use of cavity pressure for velocity to pressure transfer during the injection phase of the molding process is generally considered to be the most repeatable method. This study looked at the effect of cavity pressure transducer location and the velocity at which transfer occurs for three different process strategies: 1) transfer before the melt front hits the last place to fill, 2) transfer during the pack phase with the screw going relatively fast, and 3) transfer at the end of pack with the screw going relatively slow. This experiment found that, as long as an inflection point is seen in the cavity pressure curve, it does not matter which cavity pressure transducer location is used when considering process consistency.