Patent ID: 7225854
Filing Date: 2007-06-05
Classification: B22D

Abstract:
1. A casting method for pouring molten metal under pressure into a die cavity through a pouring passage, comprising: an evacuation step of reducing an internal pressure of said die cavity through an evacuation passage; a molten metal pressure detection step of detecting a molten metal pressure in at least one of a plurality of parts of said die cavity to be filled with the molten metal later than the other part of said die cavity and of vicinities of said parts, during pouring of the molten metal; a backpressure detection step of detecting a cavity backpressure of air and gas in at least one of said plurality of parts of the die cavity to be filled with the molten metal later than the other part of said die cavity and of the vicinities of said parts; and a control step of controlling a pouring rate of the molten metal in accordance with changes in pressures detected at said respective detection steps.