Ametek Westchester Plastics is closing its toll compounding plant in Wapakoneta, OH. The plant’s closure will eliminate 78 jobs with most cuts expected by mid-April, according to the company’s filings with the state of Ohio. In 2012, the 250,000-square-foot plant operated five twin-screw extrusion lines and three continuous mixers. The plant opened in 1959 and is part of Ametek, Berwyn, PA. To learn more, click here.