An injection molding dimensional capability comparison of three molding transfer modes each run under both a two and a three-stage molding strategy

摘要

The main focus of this study was to determine whether or not the hydraulic pressure transfer mode would produce more consistent parts than the screw position transfer mode would under simulated machine wear. The comparison was made across both two-stage and three-stage process set-ups. The three modes tested included screw position, hydraulic pressure, and cavity pressure transfer. The comparisons were made across both a two-stage and a three-stage process set-up. All of the molding trials were completed under the conditions of a mildly worn check ring that was used to simulate a portion of the normal shot size inconsistency found in a traditional production molding environment. The results showed that the cavity pressure transfer mode produced the most consistent parts. The hydraulic pressure transfer mode resulted in less variation than the screw position transfer mode.