| 摘要 |
<p>PURPOSE:To promote gasification of an organic binder and make exclusion of gas impeded for the achievement of degree of vacuum smooth so as to facilitate the manufacture of a heat insulating vessel by supplying air or oxygen using an air supply pipe when organic gas in a double wall is excluded. CONSTITUTION:In manufacture of a vacuum insulating wall where an inorganic fiber heat insulating mat 1 molded and hardened like a mat by organic binder is stored in a double wall 2, the double wall 2 is heated to gasify the organic binder, and the inside of the double wall is evacuated and sealed air-tightly after the gas is excluded, an air supply pipe 4 is inserted into one air vent hole 3 provided in the double wall 2, and its end 4A is led to the innermost part of the double wall 2. Oxygen or air is supplied from the air supply pipe 4 when the double wall 2 is heated to gasify the organic binder. The inside of the double wall 2 is evacuated from the air vent hole 3, after the generated gas is excluded from the inside, and when the inside reaches a predetermined degree of vacuum, the air vent hole 3 is sealed air-tightly with the air supply pipe 4 left as it is.</p> |
