Die-cast article quality judging method, die-casting machine selecting method, and die-casting condition determining method

Abstract

The present invention provides: a die-cast quality judging method that can easily judge whether or not a prescribed quality is satisfied; a die-casting machine selecting method of judging whether or not plural prescribed qualities are satisfied; and a die-casting condition determining method of determining die-casting conditions. It is judged that inequalities to be restricted by judging standard values Qand Qare not true from the positional relation between a process pointthat is an intersection of a machine characteristic lineand a die characteristic lineand straight lines, andand thus it is judged that the inequalities to restrict an upper limit of a filling time and a lower limit of an air vent exhaust velocity are not true. That is, it is judged that prescribed qualities are not satisfied with regard to misrun and gas inclusion.