Patent ID: 8607653
Filing Date: 2013-12-17
Classification: B22D

Abstract:
1. A die-cast quality judging method of judging whether or not a die-casting product cast under set die-casting conditions satisfies a prescribed quality on the basis of whether or not a first inequality Z≧Z B to restrict the value of a quality judging parameter Z by a first judging standard value Z B functioning as a standard for judging whether or not the prescribed quality is satisfied is true, wherein when the quality judging parameter Z is represented by an expression Z=F (Q 1 ) by using a function F of a molten metal flow rate Q 1 at actual casting, the first inequality Z≧Z B becomes an expression F (Q 1 )≧Z B , whether or not the prescribed quality is satisfied is judged on the basis of whether or not a second inequality Q 1 2 ≧Q fLB 2 modified so as to restrict a square value of a molten metal flow rate Q 1 2 at actual casting by a second judging standard value Q fLB 2 is true, wherein the quality judging parameter is a filling time T