“Needless to say, the overall casting quality suffered when we used silica sand. ![]() “Compaction problems quickly surfaced as a major problem resulting in casting mis-runs and burn-in defects,” Charles Irish explains. But, soon after starting to operate with silica sand, Irish Foundry began to recognize some less-than-satisfactory results. Uniformity of grain size, availability and cost were the fundamental selling points. “When we started in lost foam we were advised that the media of choice was silica sand,” Irish recalls. It wasn’t all as simple as changing plans. “Strategically, we have also added brass and bronze to our existing aluminum capabilities, which has opened untapped markets.”Īt least one casting produced with this new capabilities has earned Irish industry-wide recognition. The shift has allowed the Seattle company to produce “a variety of castings in varying degrees of complexity,” Irish says. ![]() The company, according to its founder Charles Irish, decided it would “build for the future” by adopting the lost-foam casting process. Irish Foundry & Manufacturing, in Seattle, was ready for a change.
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