Abstract
The aim of this study was to fabricate thin and light castings to realize an energy saving highly efficient society. High melt flow rate in a mold cavity is indispensable for the production of thin castings. However, until now, the flow ability of melt has been studied mainly by investigating flow length, but the flow rate is thought to be more important and affected by permeability, specific heat of sand mold, and atmosphere. Consequently, the influence of permeability, atmosphere, air, CO2, and He on the flow rate was investigated using a fine Teflon tube with pure water system in this study.
The results show that the flow rate is significantly affected by permeability and gas species, and is the fastest in a He atmosphere, followed by air and CO2. These results show that the flow rate is a function of the specific density of gases and is not the function of kinetic viscosity.
