Method of making a soft integral-skin foam seat

Abstract

Abstract 1. A METHOD FOR MOLDING IN TWO MOLD HALVES A COMPOSITE SOFT SEAT HAVING A SUBSTANTIALLY LIQUID AND GAS IMPERVIOUS INTEGRAL SKIN COMPRISING: POURING A LIQUID POLYURETHANE FOAMABLE REACTION MIXTURE INTO A FIRST MOLD HALF IN OPEN FACE POSITION TO FORM A FOAM UPON CURING, POSITIONING AN INSERT INTO ONE OF SAID MOLD HALVES, FORMING DURING CURING AND BY MOLDING A CONTINOUS SOLID FLASH FORMING A LEAK TIGHT SEAL AROUND THE EDGE OF SAID MOLD AND INTEGRAL WITH SAID FOAM, APPLYING PRESSURE AND CURING SAID REACTION MIXTURE TO FORM SAID FOAM, REMOVING SAID PRESSURE, POURING A LIQUID POLYURETHANE REACTION MIXTURE IN TO A SECOND MOLD HALF IN OPEN FACE POSITION, INVERTING AND PLACING SAID FIRST MOLD HALF CONTAINING SAID CURED POLYURETHANE FOAM AND SAID CONTINOUS FLASH OVER THE TOP OF SAID SECOND MOLD HALF TO COVER SAID SECOND MOLD HALF AND SAID REACTION MIXTURE CONTAINER THEREIN AND THE RIGID INSERT BETWEEN SAID FIRST AND SECOND MOLD HALVES, SEALING THE EDGES OF SAID FIRST MOLD HALF FROM THE SEACTION MIXTURE OF SAID ECOND HALF BY SAID CONTINOUS FLASH AROUND SAID FIRST MOLD HALF, CURING SAID REACTION MIXTURE UNDER PRESSURE IN SAID SECOND MOLD HALF WHILE PERMITTING SAID REACTION MIXTURE TO CONTACT THE RIGID INSERT AND THE CURED POLYURETHANE FOAM OF SAID FIRST MOLD HALF INCLUDING THE CONTINOUS FLASH THEREOF, WHILE MAINTAINING THE REACTION MIXTURE FROM SAID SECOND MOLD HALF FROM CONTACT WITH THE SIDES OF THE FIRST MOLDED POLYURETHANE FOAM, WHEREBY TO FORM AN INTEGRAL COMPOSITE SOFT SEAT HAVING AN IMPERVIOUS INTEGRAL SKIN UPON DEMOLDING AND SEVERING SAID CONTINUOUS FLASH.

Inventors

• 👤 D Harrison

Bibliographic Details