Method for processing metal-cast article

Abstract

A method for processing a metal-cast article according to an aspect of the present invention includes a correcting step of starting to pressurize the metal-cast article by a press machine ( 10, 20 ) before a temperature of the metal-cast article 40 decreases to 200° C. or lower after casting is finished. Distortion can be accurately removed in a correction of a metal-cast article. Further, since there is no need to heat the metal-cast article again for the correction, the productivity and energy efficiency can be improved.

What is claimed is: 
     
         1 . A method for processing a metal-cast article comprising a correcting step of starting to pressurize the metal-cast article by a press machine before a temperature of the metal-cast article decreases to 200° C. or lower after casting is finished. 
     
     
         2 . The method for processing a metal-cast article according to  claim 1 , further comprising a trimming step of cooling the metal-cast article to a normal temperature while maintaining the pressurized state of the metal-cast article by the press machine, and shearing off an unnecessary part of the metal-cast article. 
     
     
         3 . The method for processing a metal-cast article according to  claim 2 , wherein
 the press machine comprises an upper mold and a lower mold with a refrigerant channel formed therein, and   when the metal-cast article is cooled, a refrigerant is made to flow through the refrigerant channel.   
     
     
         4 . The method for processing a metal-cast article according to  claim 3 , wherein when the metal-cast article is cooled,
 the temperature of the metal-cast article is measured, and   a flow rate of the refrigerant is adjusted based on the measured temperature.