Improvement of quality and productivity in plastic injection molding using variable packing pressure profile

Abstract

In plastic injection molding (PIM), it is important to determine the optimal process parameters such as melt temperature and packing pressure for minimizing the warpage and cycle time. This work proposes a method to determine the optimal process parameters. Variable packing pressure profile that the packing pressure varies during the packing phase is used. Numerical simulation in the PIM is so intensive that a sequential approximate optimization is used to identify the pareto-frontier. The experiment is carried out to confirm that the proposed approach is valid to the warpage and the cycle time minimization.