TMB expands to three operating units AmeriCast Technologies Inc. reports it has sold its Prospect Foundry subsidiary in Minneapolis to TMB Industries, a Chicago-based private equity firm, for an unreported price. The sale was effective February 1. Prospect Foundry produces gray iron, ductile iron, and austempered ductile iron up to 250 lb., in short to medium runs. Tom Woehlke, president of Prospect…