Abstract 1. A METHOD FOR FORMING A HARD-FOAM PLASTIC BODY HAVING A HOLLOW SPACE THEREIN COMPRISING: SUPPORTING A CASTING CORE IN A MOLD CAVITY, SAID CORE BEING SMALLER THAN SAID CAVITY AND BEING CONSTRUCTED OF A FOAMED, THERMOPLASTIC PLASTOMER HAVING A CLOSED CELL STRUCTURE, SAID CLOSED CELL STRUCTURE BEING COLLAPSIBLE IN RESPONSE TO MELTING OF THE PLASTOMER; INTRODUCING A HARD-FOAM REACTION MIXTURE INTO SAID CAVITY AROUND THE CORE, SAID MIXTURE BEING CAPABLE OF AUTOGENOUSLY PRODUCING A REACTION TEMPERATURE SUFFICIENTLY HIGH TO MELT SAID CORE; AND MAINTAINING THE MIXTTURE WITHIN THE CAVITY UNTIL IT IREACTS AND HARDENS AND ACHIEVES SAID REACTION TEMPERATURE WHEREBY TO MELT AND COLLAPSE THE CELLS OF THE CORE AND CAUSE THE PLASTOMER MATERIAL THEREOF TO PRECIPITATE ALONG THE WALLS OF THE RESULTANT HOLLOW SPACE.
A METHOD FOR FORMING A HARD-FOAM PLASTIC BODY HAVING A HOLLOW SPACE THEREIN COMPRISING: SUPPORTING A CASTING CORE IN A MOLD CAVITY, SAID CORE BEING SMALLER THAN SAID CAVITY AND BEING CONSTRUCTED OF A FOAMED, THERMOPLASTIC PLASTOMER HAVING A CLOSED CELL STRUCTURE, SAID CLOSED CELL STRUCTURE BEING COLLAPSIBLE IN RESPONSE TO MELTING OF THE PLASTOMER; INTRODUCING A HARD-FOAM REACTION MIXTURE INTO SAID CAVITY AROUND THE CORE, SAID MIXTURE BEING CAPABLE OF AUTOGENOUSLY PRODUCING A REACTION TEMPERATURE SUFFICIENTLY HIGH TO MELT SAID CORE; AND MAINTAINING THE MIXTTURE WITHIN THE CAVITY UNTIL IT IREACTS AND HARDENS AND ACHIEVES SAID REACTION TEMPERATURE WHEREBY TO MELT AND COLLAPSE THE CELLS OF THE CORE AND CAUSE THE PLASTOMER MATERIAL THEREOF TO PRECIPITATE ALONG THE WALLS OF THE RESULTANT HOLLOW SPACE.
Claim 2
Independent Claim
125 words
A METHOD FOR FORMING A HARD-FOAM PLASTIC BODY HAVING A HOLLOW SPACE THEREIN COMPRISING: SUPPORTING A CASTING CORE IN A MOLD CAVITY, SAID CORE BEING SMALLER THAN SAID CAVITY AND BEING CONSTRUCTED OF A FOAMED, THERMOPLASTIC PLASTOMER HAVING A CLOSED CELL STRUCTURE, SAID CLOSED CELL STRUCTURE BEING COLLAPSIBLE IN RESPONSE TO MELTING OF THE PLASTOMER; INTRODUCING A HARD-FOAM REACTION MIXTURE INTO SAID CAVITY AROUND THE CORE, SAID MIXTURE BEING CAPABLE OF AUTOGENOUSLY PRODUCING A REACTION TEMPERATURE SUFFICIENTLY HIGH TO MELT SAID CORE; AND MAINTAINING THE MIXTTURE WITHIN THE CAVITY UNTIL IT IREACTS AND HARDENS AND ACHIEVES SAID REACTION TEMPERATURE WHEREBY TO MELT AND COLLAPSE THE CELLS OF THE CORE AND CAUSE THE PLASTOMER MATERIAL THEREOF TO PRECIPITATE ALONG THE WALLS OF THE RESULTANT HOLLOW SPACE.