Abstract
This innovative molding process is characterized by using an expanded polystyrene(EPS) pattern in which a required amount of inoculant is directly embedded. An untreated melt was poured into this EPS pattern by the ordinary full mold process under reduced pressure. As a result, a sound inoculated iron castings were obtained and the usefulness of this method was proved. The mechanism by which the inoculant in the EPS reacts with the melt is complex. Because Ca contained in the inoculant reacts in a nonoxidizing atmosphere formed from the organic pattern, the inoculation effect of Ca is very efficient as compared with that by the usual process. As compared with the usual inoculation treatment, this “In-pattern Inoculation” process is excellent both economically and technically.
