Three-Dimensional Simulation of Transient Temperature Distribution for Lens Mold Embedded with Heaters

摘要

To avoid cost computation, the traditional simulation of mold temperature during the injection molding is usually conducted in a cycle-averaged approach plus one-dimensional transient variation. Boundary element method is frequent adopted as the major numerical scheme. In the present study, fully 3-D simulations of mold temperature variation based on both standard FEM in single CPU and VOF implemented in parallel computation scheme were executed for a lens mold embedded with heaters. Mold surface temperature distribution was measured by infrared thermal image system from which the temperature variations at interest locations can be obtained. Within steady state molding cycle, the predicted mold surface temperatures show a difference of 8 (cavity center), 6 (parting surface), and 18 (core cavity) after mold opening and part ejection. All simulations show quite precise predictions in accordance with experimental results.