Air and water delivery system for a shell mold

For use with a shell mold having an inner mold surface for molding an article of heat-fusing plastisol material, and an outer surface, a hot air and water delivery apparatus comprising a tube sheet shaped to follow the contour of said outer surface at a predetermined distance therefrom, a plurality of selectively spaced distributors operatively connected to said tube sheet, said distributors each including nozzle means for selectively delivering hot air and water, said nozzle means having a central water inlet having an open distal end, said central water inlet being surrounded by an outer shell having a shaped upper end which provides a predetermined annular space intermediate the outer shell and the central water inlet, and adjusting means operatively connected to said outer shell for axially adjusting said outer shell so as to selectively vary an annular opening intermediate said open distal end and said shaped upper end, and first supply means for supplying air at a predetermined temperature to said respective annular spaces and said variable annular openings to selectively uniformly heat said mold outer surface during a fusion phase, and second supply means for supplying water to and through said central water inlet to uniformly cool said mold outer surface during a cooling phase.