Dinesol Plastics traces its roots to 1976 and is now guided by the third generation of the Fibus family, whose Steel City Manufacturing connection brought the company to Niles in 1989. With nearly 400 employees working across two facilities totaling more than 500,000 square feet, Dinesol is known for custom injection molding backed by ISO 9001:2015 certification and around-the-clock production.
ISO 9001:2015
Innovative Plastic Molders, IncFounded by Brian and Andrea O’Leary, Innovative Plastic Molders has spent 20 years turning product concepts into custom injection-molded plastic parts and molds. The Vandalia company combines in-house engineering and tool maintenance with a 120,000-square-foot facility and more than 30 electric presses, while also handling assembly and pack-out work. Innovative Plastic Molders is ISO 9001:2015 certified and serves customers from automotive applications to distinctive products such as its patented branded buckets.VANDALIA, OH
Doyle Shamrock IndustriesFamily-owned since Michael A. Doyle established it in 1975, Doyle Shamrock Industries grew from a one-person operation into a Holland, Ohio, manufacturer serving customers across the United States and beyond. The company specializes in custom plastic injection molding, with 200,000 square feet across two manufacturing locations and an off-site warehouse. Its work is backed by ISO 9001:2015 and ISO 14001:2015 certification.HOLLAND, OH
Superior Plastics, IncFounded in 1997, Superior Plastics is a 100% employee-owned manufacturer based in central Ohio, where its team has grown from a 5,000-square-foot leased site into a 104,000-square-foot production operation. The company is known for custom injection molding for customers in industries such as automotive and medical, with products shipped across several continents. Its quality system is ISO 9001:2015 certified.PLAIN CITY, OH
Gemini Plastics, IncFamily-owned since 1969, Gemini Plastics makes custom injection-molded plastic parts for customers worldwide. Its Fallsington, Pennsylvania operation occupies 40,000 square feet and runs around the clock, with an in-house tool room supporting mold maintenance and new tooling. The company also operates a 30,000-square-foot facility in Chihuahua, Mexico, and is an ISO 9001:2015-compliant manufacturer.FALLSINGTON, PA