| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily deform a vacuum heat insulating body into a form along a volume body to be insulated by providing grooves penetrating the end parts of one face or two faces of a core material, in the vacuum heat insulating body constituted of a core material made of powder material solidified into a flat plate, and an outer covering material made of plastic laminate having aluminum. SOLUTION: In a core material 1, for example, condesed silica powder and calcium silicate powder are mixed together, to form a powder compact compressively molded into a rectangular powder molding body. A plurality of grooves 2 are provided so as to penetrate the end parts of the one face of the core material 1 in parallel. Meanwhile, this vacuum heat insulating body 3 is formed so that the core material 1 is dried in a hot air drying furnace, and after inserting it into an outer covering material 4 made of an aluminum deposited laminate film of which the three sides are heat-fused, remaining one side is heat-fused and simultaneously released in the atmosphere. Stress due to atmospheric compression is concentrated to the grooves 2 of the core material 1, and the vacuum heat insulating body 3 is easily deformed in the direction of burying the spaces formed by the grooves 2. Hereby the cylindrical vacuum heat insulating body 3 can be formed simply and quickly.</p> |
