Colloidal silica water based slurry system for investment casting shell backup coats

摘要

A water based slurry for use as backup coat on a wax model has colloidal silica and milled zircon as primary ingredients. The slurry is utilized as a backup coat on a wax model used in a lost wax investment casting technique. The slurry comprises of colloidal silica, a latex glue, ammonium alginate, a wetting agent, milled zircon, tabular alumina, glass rock and an anti-foaming agent.