CASTING MOLD FOR FIBER REINFORCED METALLIC CASTING MOLD AND CASTING METHOD USING SAID MOLD

摘要

PURPOSE:To decrease the energy loss in the stage of preheating a casting mold and to reduce at the same time the time for casting in the stage of manufacturing a titled casting by a molten metal forging method by constituting the casting mold of a master mold and liner molds split to >=2 parts. CONSTITUTION:A liner mold 1 in the case of producing, for example, a connecting rod of an internal combustion engine consists of a liner mold 2 to serve as a vessel for a molten metal and a liner cope 3 to be fitted to the tapered inside wall surface 2 on the inside circumferential surface thereof from above. The mold 1 is first preheated and is once cooled after coating of a parting material thereon. A fiber bundle is disposed in the drag 2 and the cope 3 is placed on the top side of the drag 2 to assemble the mold 1. The mold 1 is then preheated to remove the coating material on the surface of the fiber bundle and to improve run and thereafter the mold is put into a drag 6 and while the top surface of the cope 3 is lightly pressed by the cope 7, the molten metal is poured through a hole 5a for a pressurizing punch and a sprue 5 into the mold space 11 of the mold 1. The cope 7 is thereafter clamped by pressing and a punch 4 is lowered to press the molten metal. The punch 4 and the cope 7 are released of the pressurization after waiting for the solidification of the molten metal. Knock-out pins 9 are risen after the rise of the cope 7 to remove the cope 3 and a produce 12. The drag 2 is further removed from the cope 6.