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Patent Searching and Data


Title:
MOLD MANUFACTURING METHOD AND VENTILATION OVEN FOR MOLD STRUCTURE RE-HEATING USED IN MOLD MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/166071
Kind Code:
A1
Abstract:
The present invention provides a mold manufacturing method for manufacturing a mold having a hollow pattern 13 having the same shape as a cast product, the mold manufacturing method including: a step for heating a mold structure 4 formed by solidifying an investment material 3 in which an evaporative pattern mold 1 is embedded, and melting the evaporative pattern mold 1 and discharging the evaporative pattern mold 1 from the mold structure 4; a step for burning a residue of the evaporative pattern mold 1 that remains in the mold structure 4 without being discharged; and a step for firing the investment material 3 after the step for burning the residue of the evaporative pattern mold 1; wherein, by including a step for accommodating the mold structure 4 in a sealed space and repeatedly alternating evacuation of the sealed space and supplying of an oxygen-containing gas into the sealed space in an environment of heating at the combustion temperature of the evaporative pattern mold 1 at least after the step for burning the residue of the evaporative pattern mold 1, complete combustion occurs even in an evaporative pattern mold having a fine shape, and carbide formed by incomplete combustion of the evaporative pattern mold does not remain in the hollow pattern 13. The present invention also provides a ventilation oven for mold structure re-heating, provided to a mold manufacturing device used in the mold manufacturing method.

Inventors:
YASUI SHINSAKU (JP)
Application Number:
PCT/JP2019/005608
Publication Date:
August 20, 2020
Filing Date:
February 15, 2019
Export Citation:
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Assignee:
CSG INVEST COLTD (JP)
International Classes:
B22C9/04; B22C7/02; B22C9/12; F27D7/06; B22C9/22; B22C9/24
Foreign References:
JPH10310804A1998-11-24
JPS44201B1
JP2003053481A2003-02-26
JP2012517581A2012-08-02
JP2000254759A2000-09-19
JPH0966344A1997-03-11
Attorney, Agent or Firm:
OTSUKA, Akihiro (JP)
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