Thermally insulated ceramic container and method for manufacture thereof

A method of manufacturing a thermally insulated ceramic container, comprising the steps of:

• (1) forming an inner green container wall, and an outer green container wall larger than said inner green container wall, each having an upper circumferential edge;
• (2) inserting said inner wall within said outer wall, said inner and outer walls being sized so that an inner cavity is located between said inner and outer walls when said inner wall is inserted within said outer wall;
• (3) forming an opening in said outer wall, said opening opening into said inner cavity when said inner wall is inserted within said outer wall;
• (4) intimately joining said inner and outer walls along their upper circumferential edges with cement to form a molded green double-wall container after step (3);
• (5) firing said molded green double-wall container to produce a double-wall ceramic container;
• and
• (6) injecting a foaming resin of low thermal conductivity into said inner cavity through said opening and foaming said resin to thereby form an insulation filling said inner cavity.

A method of manufacturing a thermally insulated ceramic container, comprising the steps of:

• (a) mixing raw material for ceramics with water to form a dough;
• (b) molding said dough into an inner green container wall having an upper portion and a lower portion below said upper portion and having a first upper circumferential edge on said upper portion, an upper half member having a second upper circumferential edge and a lower circumferential edge, and a lower half member having a third upper circumferential edge, said upper half member and said lower half member together when joined forming an outer green container wall larger than said inner green container wall;
• (c) forming an opening in said lower half member;
• (d) placing said upper half member over said inner wall so as to cover said upper portion;
• (e) intimately joining said upper half portion and said inner wall along said first and second upper circumferential edges with cement;
• (f) placing said lower half member over said inner wall so as to cover said lower portion, said upper and lower members being sized so that an inner cavity is formed between said upper and lower members and said inner wall;
• (g) intimately joining said upper and lower members along lower and third upper circumferential edges, respectively, with cement, to form a molded green double-wall container;
• (h) after step (g), firing said molded green double-wall container to produce a double-wall ceramic container;
• and
• (i) injecting a foaming resin of low thermal conductivity into said inner cavity through said opening and foaming said resin to thereby form an insulation filling said inner cavity.