Injection molder and toolmaker Plastic Design & Manufacturing Inc. is building a 20,000-square-foot addition to its factory in Manhattan, Mont., to accommodate its expanding two-shot molding business.

Before Duerr Inc. laid out its new building, it had a wish list built over years to start the planning. The company’s best single investment? The central material handling system. Husky’s Factory ...

Injection molded plastics have revolutionized design, innovation, and manufacturing in the 20th century. Before 1950, most products were manufactured in stamped steel, die-cast aluminum, zinc, and ...