| 摘要 |
PURPOSE:To eliminate the need for mounting, recovering, screening and molding of chillers and recovering of sand and to improve workability by using permanent casting molds having high heat conductivity to the parts to be chilled of the cast iron casting to be cast, using the permanent casting molds having the low heat conductivity to the parts not to be chilled and making both molds into integral construction. CONSTITUTION:The forming parts 12a, 13a of a mold cavity 14 corresponding to the parts to be chilled of the cast iron casting to be cast and the body parts 12b, 13b of split molds 12, 13 are formed of the integral permanent molds 15, 16 having the high heat conductivity and the forming parts 12c, 13c of the mold cavity 14 corresponding to the part not to be chilled of the cast iron casting and to be made into the structure having good workability or toughness, etc. are formed of the permanent molds 17, 18 having the low heat conductivity. The molds 15 and 17 as well as 16 and 18 are coupled by means of fasteners to form the split molds 12, 13. The molds 12, 13 are mated and clamped to form the cavity 14 in the inside in the stage of casting. |
