| 摘要 |
PURPOSE:To more surely form the structure in the respective regions of a casting by preheating a 1st forming area of a die to the temp. lower than the temp. in the 2nd forming region and subjecting the 1st region to quick cooling and the 2nd region to slow cooling after pouring. CONSTITUTION:A molding block 14 is provided via a heat insulating material 131 to a body 11 of split dies 51, 52, then quick cooling bodies 181, 182 are disposed as the 1st molding region thereto. A slow cooling body 15 is formed thereto as the 2nd molding region. The heat insulating material 132 is disposed between the quick cooling bodies 181, 182 and the slow cooling body 15. The die 5 is preheated by heating circuits H to maintain the quick cooling bodies 181, 182 at the temp. lower than the temp. of the slow cooling body 15 prior to pouring. The heating is stopped after the pouring and thereafter, the die 5 is cooled by cooling circuits C1-C3 to quickly cool the quick cooling bodies 181, 182 and to slowly cool the slow cooling body 15. Since the heat insulating materials 131, 132 are interposed, the formation of the structure by the quick cooling bodies 181, 182 and the slow cooling body 15 is more surely permitted.
|
