Rapid Metallic Die Manufacturing is a new diemaking technology as a result of the application of RPM to dies production.In order to manufacture highquality metallic dies in ceramic investment casting much attention has been paid to preparation of hydrolytic solution of ethyl silicate

refractory grain distribution

preparation of ceramic slury

selection of catalyzers

process of spout

process of firing

etc.A systematic research has been carried out to develop a set of Laminated Object Manufacturing （LOM） prototypes processes for high quality metallic dies in ceramic investment casting.The success of these processes has been confirmed by real production.