The Design of Feed Systems for Thin-Walled Zinc High-Pressure Die Castings

摘要

A number of methods have been devised for the design of feed systems in high-pressure die castings to optimize their mechanical properties. Most of these result in a decrease in the included gas porosity by having runners which decrease in area along the flow direction. Although the influence of the ingate design on matters such as surface quality of the casting and erosion of the die are well known, the ingate is not usually a critical part of design for optimizing mechanical properties. Nevertheless, it is known that the mechanical properties of pressure die castings made of zinc alloy 3 (Zn-4.1 Al-0.05 Mg) can be improved by controlling ingate size and molten metal injection velocity. In this article, we describe a method for designing the ingate so as to optimize the mechanical properties.