Study of Nozzle and Vent Locations on Die Casting Filling Process

摘要

The casting nozzle location plays an important role in die casting. Improper location results in defects,rnsuch as cold shut, air cavity, shrinkage, etc. Therefore, it’s sure that the molten metal full fills the mould cavityrnbefore it solidifies. And, it’s to be wished that no vortex occur during the filling process, because the vortex is arnmain source that induces gas entrapment. To get the high quality and performance product, the inlet and outletrnlocations must be set properly. This paper, an optimal design problem of nozzle and vent locations, which isrnconstrained by nonlinear partial differential equations and boundary and initial conditions, is introduced torndescribe the location selection on die casting filling process. By numerical simulation, one can compare the fillingrntime, flow pattern and temperature field at different inlet and outlet locations, then choose the most properrnlocations