Casting Industries

Sodium silicate bonded sand is perhaps the most common sand molding system used in art foundries. It is used in casting industries for the manufacturing of large number of metal components. Finely graded dry SILICA refractory sand is used for this process. Before moulding, the sand is mixed with a proportional quantity of a sodium silicate binder. Sodium silicate [WATERGLASS] is a water soluble vitreous material suspended in SODA (a strong alkaline), resulting in a thick viscous syrup like substance. The advantage to this binder is that it occurs at room temperature and quickly. It acts as a binder and hence improves the properties of the mould and thus increases its life.