A method of producing cast metal dies patterns and core-boxes

摘要

A cast metal die is produced by casting a zinc based alloy around a pattern 1. After casting, the alloy is aged by subjecting it to a temperature of up to 276 DEG C for a predetermined time. This results in conversion of metastable phases formed during and shortly after solidification of the alloy as a result of which the casting expands. This expansion is used to compensate for IMAGE