Top 10 Injection Molding Companies in Ohio: A Comprehensive Overview

1. What is Injection Molding?

Injection molding is a widely-used manufacturing process in which molten material, typically plastic, is injected into a mold cavity. Once cooled and solidified, the mold opens to eject the finished part. This process is crucial in producing high-precision, mass-produced items used in a variety of industries, including automotive, medical, electronics, and packaging.

Ohio, with its rich industrial history, is home to some of the most reputable injection molding companies. These companies excel in offering a broad range of services, from part design and tooling to mass production, post-production processes, and material selection.

2. Top Injection Molding Companies in Ohio: Overview

Let’s take a closer look at ten leading injection molding companies in Ohio. For each, we will outline their location, the year they started, their key services, and the advantages they offer to customers.

2.1 Proto Plastics

Location: Tipp City, Ohio
Year Started: 1969
About: Proto Plastics specializes in producing high-quality, precision injection-molded components. They work with industries such as aerospace, automotive, medical, and electronics.
Advantages: With over five decades of experience, Proto Plastics focuses on flexibility and efficiency in small to mid-size production runs. Their engineering expertise allows them to support complex part design and prototyping.
Main Services:
- Custom plastic injection molding
- Product design and engineering
- Assembly and finishing services
- Rapid prototyping

2.2 Thogus Products Company

Location: Avon Lake, Ohio
Year Started: 1950
About: A pioneer in custom plastic injection molding, Thogus has transitioned from a tool and die shop into an advanced injection molding company with extensive experience in materials and design for manufacturability.
Advantages: Thogus offers significant expertise in material selection and engineering services. Their collaborative approach helps clients develop complex products while maintaining cost efficiency.
Main Services:
- Custom plastic injection molding
- Insert molding
- Overmolding
- Part design consultation
- 3D printing and rapid prototyping

2.3 Master Molded Products Corp.

Location: Greenville, Ohio
Year Started: 1946
About: Master Molded Products is a family-owned company with over 70 years of experience in injection molding. They serve industries including automotive, agriculture, and electronics.
Advantages: Known for their longevity and innovation, Master Molded Products offers tailored solutions and state-of-the-art facilities to meet specific customer needs.
Main Services:
- High-volume plastic injection molding
- Tooling and mold design
- Value-added secondary services
- Material selection support

2.4 Plastic Systems, LLC

Location: Willoughby, Ohio
Year Started: 1992
About: Plastic Systems, LLC specializes in high-performance thermoplastic injection molding. The company caters to a wide variety of markets including automotive, industrial, and medical sectors.
Advantages: They focus on innovation and quality assurance, with ISO 9001 certification and advanced quality control measures. Their lean manufacturing processes enable cost-effective production with minimal waste.
Main Services:
- Custom injection molding
- Insert and overmolding
- Assembly and packaging
- Tooling and prototyping

2.5 Ohio Precision Molding, Inc.

Location: Valley City, Ohio
Year Started: 1979
About: Ohio Precision Molding provides full-service injection molding, with capabilities ranging from prototype development to high-volume production.
Advantages: Their advanced machinery and tooling technology make them a top choice for intricate and tight-tolerance parts. They offer short lead times and customized solutions.
Main Services:
- Precision plastic injection molding
- Mold design and tooling
- Secondary operations (e.g., painting, assembly)
- Just-in-time delivery

2.6 Proto Plastics, Inc.

Location: Tipp City, Ohio
Year Started: 1969
About: Proto Plastics has been delivering custom injection molding services for more than 50 years. They emphasize innovation and customer satisfaction, serving industries such as aerospace, medical, and electronics.
Advantages: The company is noted for its engineering support, offering assistance from product concept through production. They pride themselves on precision, efficiency, and quality control.
Main Services:
- Product design and engineering
- Custom injection molding
- Assembly and packaging
- Prototyping and tooling

2.7 Universal Plastic Mold, Inc.

Location: Westerville, Ohio
Year Started: 1964
About: Universal Plastic Mold is a full-service plastic injection molding company, focusing on providing high-quality parts to the automotive and consumer product sectors.
Advantages: Universal Plastic Mold is known for its capacity to handle both low- and high-volume production runs. Their dedicated customer service and precision tooling capabilities ensure customer satisfaction.
Main Services:
- Plastic injection molding
- Part design consultation
- Prototyping and tooling
- Secondary finishing operations

2.8 Rexam Mold Manufacturing Co.

Location: Piqua, Ohio
Year Started: 1984
About: Rexam Mold Manufacturing Co. offers custom molding solutions with a focus on precision and reliability. Their client base spans a variety of industries, including packaging, healthcare, and electronics.
Advantages: Rexam prides itself on utilizing modern injection molding technology and offering complete tooling services in-house. They are committed to quality and efficiency in every stage of production.
Main Services:
- Custom injection molding
- Mold design and manufacturing
- Prototyping and tooling
- Quality assurance services

2.9 Custom Molded Products

Location: Urbana, Ohio
Year Started: 1983
About: Custom Molded Products (CMP) delivers high-performance plastic molding solutions for industries such as automotive, agricultural, and industrial.
Advantages: CMP offers advanced design capabilities and a high degree of flexibility in production. They are well-regarded for their ability to meet the most demanding production requirements.
Main Services:
- High-precision injection molding
- Mold making and repair
- Assembly and secondary operations
- Prototyping services

2.10 Lerner Molded Plastics

Location: Akron, Ohio
Year Started: 1976
About: Lerner Molded Plastics is a leader in large-part molding and serves industries such as medical, industrial, and automotive.
Advantages: With a focus on large, complex parts, Lerner Molded Plastics combines expertise in design, manufacturing, and logistics to deliver a comprehensive suite of services. Their large-tonnage molding machines allow them to take on massive projects.
Main Services:
- Large-part plastic injection molding
- Tooling and design support
- Secondary operations (painting, assembly)
- Supply chain management

3. Why Choose Injection Molding Companies in Ohio?

Ohio is a strategic location for injection molding companies for several reasons:

Proximity to Key Industries: Ohio is a hub for automotive, aerospace, and healthcare sectors, making it an ideal location for injection molding companies to support these industries.
Skilled Workforce: Ohio has a long history of manufacturing excellence, and the skilled workforce is well-equipped to handle the demands of modern injection molding.
Advanced Technologies: Many of Ohio’s injection molding companies invest heavily in the latest technologies, including automation, robotics, and precision tooling, ensuring top-tier product quality.
Cost Efficiency: Thanks to lean manufacturing practices and competitive labor costs, injection molding companies in Ohio offer cost-effective solutions without compromising on quality.

4. Conclusion

Injection molding companies in Ohio are known for their innovation, quality, and customer-centric approach. Whether you need precision small parts or large-scale components, Ohio’s molding companies offer a wealth of expertise and cutting-edge technologies to meet your project’s needs. From Proto Plastics to Lerner Molded Plastics, these companies have built a reputation for excellence across various industries, making Ohio a key player in the global injection molding industry.

By choosing a company from Ohio, you ensure that your products are made with the highest standards of quality