FOUNDRY FLASK GUIDE APPARATUS

摘要

A guide pin and bushing assembly for use in the alignment of the cope and drag of a foundry flask or core box wherein the bushing is reversible and is formed with two external annular grooves and carries a resilient retaining ring in one of said grooves. As the bushing becomes worn at one end on its interior through repeated frictional contact with the guide pin, it can be reversed to use the other end by removal of the retaining ring and replacing the ring in the other annular groove. This effectively doubles the useful life of the bushing.