TWO-MATERIAL INJECTION MOLDING FILLING SIMULATION

摘要

Two-material injection molding is gaining popularity due to its potential to produce multifunctional plastic parts at reduced cost. It is postulated that the influence of the interface boundary on the flow pattern of the overmold is insignificant due to high filling rates normally encountered in two-material injection molding. In this paper, a simulation program is developed to study the effect of the interface boundary for the overmold filling process. The simulation uses the bulk temperature of the substrate at the end of packing as the overmold's boundary temperature on the contact surface. Comparison of results with conventional injection molding revealed that flow pattern and injection pressure are both affected by the different temperature boundary condition.