THE DESIGN OF L-SHAPED RUNNERS FOR GRAVITY CASTING

摘要

The purpose of this research is the development of guiding principles and rules for the design of filling systems for aluminium gravity castings. The approach employs computational modeling and real-time X-ray radiography. Out of five geometries of L-junctions that occur in filling systems and which have been studied, space dictates that only the sprue/runner junction is presented. Progressive filling along the L shaped geometry has been achieved without surface turbulence by eliminating excess cross sectional area of the channels, and in particular reducing the "dead zone" in the comer of the junction. Higher flow rate and less turbulent filling of the mould cavity can be achieved by the new L shaped junction design.