Parametric Optimization of CO2 Mould Made of Reclaimed Sand for Better Collapsibility

Inherent drawback of CO2 moulding i.e Poor knockout property made the subject of moulding sand reclamation more prominent. In the present paper it is attempted for optimization of the process parameters of CO2moulding process made of reclaimed sand for better knockout property. Retained compression strength after exposing the mould to 10000C for ten minutes and cooling to room temperature is considered as measure of knockout property or collapsibility. Taguchi method is employed for the purpose. % of Sodium silicate, percentage of coal dust, mixing time and interaction between sodium silicate and mixing time have significant effect on the collapsibility.