Title:
BOX FOR HEAT TREATING FURNACE
Document Type and Number:
Japanese Patent JPH01159588
Kind Code:
A
Abstract:
PURPOSE: To stabilize the quality of an article and save the amount of gas consumption by forming a gas spray hole in an atmospheric gas passage formed along and inner wall of a chamber, and connecting a gas introduction pipe protruding externally of the chamber. CONSTITUTION: A heat treatment chamber 1 is adapted such that an atmospheric gas passage pipe 3 is disposed in a pan shaped chamber member 2 of a heat insulating material, and a gas introduction pipe 4 is jointed with the pipe 3. A gas injection hole 5 is formed which is opened inwardly of the chamber member 2. The gas introduction pipe 4 penetrates the chamber member 2 from the outside of the chamber member 2 and is joined with the pipe 3. Gas introduced from the pipe 4 as indicated by an arrow is injected from the gas injection hole 5 after passage through the pipe 3. Hereby, since an article to be heat treated in the chamber makes contact with fresh atmospheric gas at all times, quality of an article is stabilized. Further, the amount of gas consumption is saved with short time replacement of the atmosphere in the chamber.
Inventors:
KAWAMURA AKIYOSHI
Application Number:
JP31820787A
Publication Date:
June 22, 1989
Filing Date:
December 14, 1987
Export Citation:
Assignee:
MURATA MANUFACTURING CO
International Classes:
H01G4/12; F27D3/12; F27D7/02; H01C17/30; H01G13/00; (IPC1-7): F27D3/12; F27D7/02; H01C17/30; H01G4/12; H01G13/00
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)
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