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Title:
MANUFACTURE OF METALLIC VACUUM BOTTLE
Document Type and Number:
Japanese Patent JPH03267023
Kind Code:
A
Abstract:

PURPOSE: To seal a sealing port certainly without using jigs by melting wax material set on the plumb upper wall of an exhaust hole, and permitting the wax material to flow plumb downward along the wall, after a void section between internal and external bottles is set to a specified vacuum degree, and by sealing the exhaust hole.

CONSTITUTION: A metallic internal bottle 1 and a metallic external bottle 4 are jointed to each other at a port section, and a void section 5 between the internal and external bottles 1, 4 is evacuated and sealed. In its case, on the bottle wall of either internal bottle 1 or external bottle 4, an evacuated small hole or slit-shaped exhaust hole 10 is set. After that, on the plumb upper wall of the exhaust hole 10, wax material 11 is set. In this state, vacuum-heating processing is performed, and the void section 5 between the internal and external bottles is set to a specified vacuum degree, and after that, the wax material 11 is melted, and is permitted to flow downward vertically along the wall, and the exhaust hole 10 is sealed. As a result, at the time of vacuum-sealing, a sealing port can certainly be sealed without using jigs, and a manufacturing process can be automatized.


Inventors:
TOIDA SHOJI
ITO SEIICHI
TSUCHIYA SHIGERU
OGAWA YASUO
Application Number:
JP1990000066614
Publication Date:
November 27, 1991
Filing Date:
March 16, 1990
Export Citation:
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Assignee:
NIPPON OXYGEN CO LTD
International Classes:
A47J41/02; B23K1/00; B23K31/02; (IPC1-7): A47J41/02; B23K1/00; B23K31/02



 
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