Science, Maths & Technology
Low pressure sand casting
...centre of holding furnace in a non-turbulent manner by means of an electromagnetic pump, gradually displacing air through the permeable sand mould. Moulds produced by zircon sand (ZrO2/silicate) which has a very low coefficient of thermal expansion (<0.2% at casting temperature), leading to high accuracy. Cores and moulds are assembled at room temperature, with accuracies...