초록 ▼

The present invention is a method of sealing a metal vacuum structure (vacuum bottle) for evacuating a space S closed by component members (an inner shell 2 and an outer shell 3) through an evacuation port and then sealing the evacuation port. Forming a brazing-material placing recess 6 in one of th

The present invention is a method of sealing a metal vacuum structure (vacuum bottle) for evacuating a space S closed by component members (an inner shell 2 and an outer shell 3) through an evacuation port and then sealing the evacuation port. Forming a brazing-material placing recess 6 in one of the component members, the brazing-material placing recess opening downward when the structure is set for evacuation; forming an aperture 7 in the brazing-material placing recess; placing brazing material, in molten state, in the brazing-material placing recess in such a way as to block the aperture and fixing the brazing material; forming an evacuation port 8a in the brazing material; fixing a drop preventing member 9 having a through hole 11 on the component member in opposed relation to the brazing material; evacuating the space closed by the component members through the evacuation port of the brazing material; melting the brazing material; and making the evacuation port disappear to seal it by melting the brazing material as the drop preventing member prevents the brazing material from dropping.

대표청구항 ▼

[ We claim:] [1.]1. A method of sealing a metal vacuum structure for evacuating a space closed by component members through an evacuation port and then sealing the evacuation port, the method comprising:forming a brazing-material placing recess in one of the component members, the brazing-material p

[ We claim:] [1.]1. A method of sealing a metal vacuum structure for evacuating a space closed by component members through an evacuation port and then sealing the evacuation port, the method comprising:forming a brazing-material placing recess in one of the component members, the brazing-material placing recess opening downward when the structure is set for evacuation;forming an aperture in the brazing-material placing recess;placing brazing material, in molten state, in the brazing-material placing recess in such a way as to block the aperture and fixing the brazing material;forming an evacuation port in the brazing material;fixing a drop preventing member having a through hole on the component member in opposed relation to the brazing material;evacuating the space closed by the component members through the evacuation port of the brazing material;melting the brazing material; andmaking the evacuation port disappear to seal it by melting the brazing material as the drop preventing member prevents the brazing material from dropping.