Semi-Permanent Mold The Semi-Permanent Mold process requires both metal dies and sand cores to create internal cavities for fluid flow or specific internal designs. This method enhances product strength as compared to sand casting but also allows intricate passages to be created. Key Benefits:    Allows flexibility for internal cavity design during development.    Casting strength surpasses sand-cast product.    Enhances the standard permanent mold process by allowing different configurations for internal cores and passages. Applications:    Transmission pump housings    Textile machine parts    Drums and feed tables for duplicating machines    Rotor housings