The Effect of Spin Cast Parameters on Porosity and Pore Size Distribution in Zinc Alloy

Abstract

The purpose of this study is to investigate the effect of temperature, rotational speed, runner and gate size on porosity and pore size distribution in zinc alloy spin castings using rubber molds made of a high temperature resistant grade. Porosity in casting specimens was quantified using SigmaScan® image analysis software. Experimental results show that an increase in casting temperature results in the increase of porosity and pore size. As rotational speed increased, porosity and pore size decrease. Longer runner increases pore number but decreases average pore size. A decrease in gate size results in the decrease of feeding velocity of molten metal and therefore decreases porosity. So, it could be useful in the spin casting industrial for setting the casting parameters to eliminate porosity defects.