METHOD OF CASTING CAST IRON, RISER PART, CASTING MOLD AND METHOD OF FORMING CASTING MOLD

摘要

PROBLEM TO BE SOLVED: To provide a casting technique of embedded riser type capable of producing a satisfactory cast iron product by preventing the deformation of a weak part of a casting mold that occurs upon casting of the cast iron, the occurrence of defective dimension of the cast iron product, the occurrence of drawing cavity, etc.;SOLUTION: A riser part 2 of embedding type disposed so as to be communicated with a product cavity part 6 comprises: a molten iron filled part 3 for exhibiting the original riser effect; and a pressure absorption part 4 for absorbing an incremental pressure occurring when the molten iron is coagulated, wherein a barrier wall 5 which can be swollen to the side of the pressure absorption part 4 or can be split and opened by the incremental pressure is disposed between the molten iron filled part 3 and the pressure absorption part 4, the incremental pressure of the molten iron occurring in the molten iron filled part 3 is liberated to the pressure absorption part 4. Thereby, the casting is performed so as not to apply an excessive pressure to a product cavity part 6.;COPYRIGHT: (C)2011,JPO&INPIT