Patent ID: 6375292
Filing Date: 2002-04-23
Classification: B29C,F25D,Y10S,Y10T

Abstract:
A method for producing a vacuum heat insulation box body, comprising the steps of:integrating an inner box and an outer box into a shell which is opened in an open bottom surface of said outer box; inserting a first structural material having continuous pores and a triangular section into a space formed between the inner and outer boxes first shell through the opening of said first shell, by inserting a bottom side portion of said first structural material first; inserting a second structural material having continuous pores and a triangular section into said space through said opening of said first shell by inserting a vertex portion of said second structural material first to thereby fill said space of said first shell; blocking the opening of said first shell with a third structural material having continuous pores and a shape of a flat plate; enclosing said third structural material with a plate member to seal the joint portion between said plate member and said first shell to thereby fully close said shell; and evacuating said second shell.