Family-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.
ISO 9001:2015
ISO 14001:2015
UL94 V0 flame rating
Compliance program
RoHS and REACH SVHC compliance
Compliance program
NSF Certified
UL-approved battery connectors
NSF
Quality certification
UL
Quality certification
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
DEIMLING/jeliho Plastics, IncWhat began in Bill Deimling’s garage in 1976 is now a family-owned and operated plastics manufacturer in Amelia, Ohio. DEIMLING/jeliho Plastics is known for combining deep tooling experience with custom thermoplastic injection molding for customers across the Americas, Europe, and China. Its 108,000-square-foot facility and ISO 9001:2015 conformance reflect a long-running operation that has grown without losing its personal, hands-on character.AMELIA, OH
GSH IndustriesSince 1986, GSH Industries has remained a third-generation family business in Ohio, known for keeping custom manufacturing work in-house. It serves OEM customers across North America with made-to-spec plastic components, supported by 15 injection molding machines and more than 150 years of combined industry experience.STRONGSVILLE, 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