Title:
SUB-ZERO TREATMENT METHOD AND APPARATUS THEREOF
Document Type and Number:
Japanese Patent JP3946796
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To uniformly and quickly cool granular materials to be cooled, closely filled in a vessel by directly injecting low temp. gas to the materials.
SOLUTION: For example, at the time of executing a sub-zero treatment of a bearing balls, firstly, the bearing balls as the materials to be cooled are incorporated in the most close condition of filling arrangement into a basket 10. Successively, the basket 10 is charged into a cooling vessel 2. Then, a stirring fan 4 and a cold blasting fan 11 are worked and also, introducing of e.g. liquefied nitrogen is started from a coolant introducing course 3. By this method, the bearing balls become the condition, in which the low temp. atmospheric gas in the vessel is directly injected with the cold blasting fan 11 and passed through small gaps among the bearing balls. Therefore, since the balls at the center part of the basket 10 can directly be cooled with the low temp. gas as the same condition as the balls at the outer peripheral part, the whole bearing balls can be cooled to a specific temp. in a short time.
Inventors:
Masahiro Hirano
Koji Takeuchi
Koji Takeuchi
Application Number:
JP22104096A
Publication Date:
July 18, 2007
Filing Date:
August 22, 1996
Export Citation:
Assignee:
Taiyo Nippon Sanso Co., Ltd.
International Classes:
C21D1/18; C21D9/36; (IPC1-7): C21D1/18; C21D9/36
Domestic Patent References:
| JP54102518U | ||||
| JP56081965U |
Attorney, Agent or Firm:
Kazuhiko Kido
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