Rotational method for casting hollow bodies including spraying of a liquid heat transfer medium

Claim 1

THE METHOD OF CASTING A HOLLOW ARTICLE FROM A PLASTIC RESIN CASTING COMPOSITION, WHICH METHOD COMPRISES PARTIALLY FILLING A HOLLOW MOLD OF HEAT-CONDUCTIVE COMPOSITION WITH SAID PLASTIC COMPOSITION, CLOSING SAID MOLD, CONTINUOUSLY WASHING THE OUTER SURFACE OF SAID MOLD WITH A LIQUID HEATING MEDIUMHEATED TOA TEMPERATURE ABOVE 325*F. BY SPRAYING SAID HEATING MEDIUM THEREON WHILE BIAXIALLY ROTATING SAID MOLD TO PROVIDE SUBSTANTIALLY UNIFORM TRANSFER OF SUBSTANTIALLY THE TOTAL HEAT ENERGY REQUIRED TOCURE SAID PLASTIC COMPOSITION, FROM THE HEATING MEDIUM TO THE MOD SURFACE, THEREBY QUICKLY DISTRIBUTING SAID PLASTIC COMPOSITION OVER THE INTERIOR SURFACE OF SAID MOLD AND HEATING SAID PLASTIC COMPOSITION QUICKLY AND SUBSTANTIALLY UNIFORMLY TO A TEMPERATURE OF AT LEAST 300*F. TO RAPIDLY CURE SAID PLASTIC COMPOSITION WITHOUT SUBSTANTIALL DEGRADATION OR DISCOLORATION, COOLING SAID PLASTIC COMPOSITION AND REMOVING THE RESULTING HOLLOW ARTICLE FROM THE MOLD.

Claim 2

THE METHOD OF CASTING A HOLLOW ARTICLE FROM A PLASTIC RESIN CASTING COMPOSITION, WHICH METHOD COMPRISES PARTIALLY FILLING A HOLLOW MOLD OF HEAT-CONDUCTIVE COMPOSITION WITH SAID PLASTIC COMPOSITION, CLOSING SAID MOLD, CONTINUOUSLY WASHING THE OUTER SURFACE OF SAID MOLD WITH A LIQUID HEATING MEDIUMHEATED TOA TEMPERATURE ABOVE 325*F. BY SPRAYING SAID HEATING MEDIUM THEREON WHILE BIAXIALLY ROTATING SAID MOLD TO PROVIDE SUBSTANTIALLY UNIFORM TRANSFER OF SUBSTANTIALLY THE TOTAL HEAT ENERGY REQUIRED TOCURE SAID PLASTIC COMPOSITION, FROM THE HEATING MEDIUM TO THE MOD SURFACE, THEREBY QUICKLY DISTRIBUTING SAID PLASTIC COMPOSITION OVER THE INTERIOR SURFACE OF SAID MOLD AND HEATING SAID PLASTIC COMPOSITION QUICKLY AND SUBSTANTIALLY UNIFORMLY TO A TEMPERATURE OF AT LEAST 300*F. TO RAPIDLY CURE SAID PLASTIC COMPOSITION WITHOUT SUBSTANTIALL DEGRADATION OR DISCOLORATION, COOLING SAID PLASTIC COMPOSITION AND REMOVING THE RESULTING HOLLOW ARTICLE FROM THE MOLD.