Our opinion is that you would want your electrical enclosures to be manufactured by the world’s topmost and most reliable injection molding companies. Identifying the world’s best companies with such a facility is thus extremely crucial. In the following, we will provide the world’s top 10 injection molding companies for electrical enclosures, their manufacturing capacity, technical capabilities, and creativity in the electrical and electronics industry. Regardless of your need for industrial machine enclosures, household appliance enclosures, or one-off product custom enclosures, these companies are the crème de la crème of the injection molding sector in terms of accuracy, creativity, and reliability.
1. List of Injection Molding Manufacturers for Electrical Enclosures in the World
Below are the top 10 injection molding suppliers of electrical enclosures in the world. They specialize in the latest molding technology, have a strong manufacturing base, and ensure quality to supply the global electrical and electronic sector.
| NO. | Company | Website | Year established |
| 1 | Ferriot | https://www.ferriot.com/ | 1946 |
| 2 | TenX Manufacturing | https://tenxmanufacturing.com/ | 1980 |
| 3 | Holly Plastic | https://www.hollyplasticparts.com/ | 2000 |
| 4 | Gregstrom | http://gregstrom.com/ | 1946 |
| 5 | SIMCO | https://www.simcobox.com/ | 2008 |
| 6 | Woodland Plastics | https://woodlandplastics.com/ | 1996 |
| 7 | Plastic Molded Concepts | https://pmcplastics.com/ | 1975 |
| 8 | Phoenix Mecano Solutions AG | https://www.phoenix-mecano.ch/en/home/ | 1990 |
| 9 | Custom Design Technologies | https://www.customdesigntechnologies.com/ | 1986 |
| 10 | Baytech Plastics | https://www.baytechplastics.com/ | 1946 |
2. Top 10 Injection Molding Manufacturers for Electrical Enclosures in the World
They are world leaders in injection molding of electrical enclosures, bringing the latest in manufacturing capacity, technical innovation, and company dedication to quality to meet the broad needs of industries from electronics to industrial automation.
Top 1: Ferriot

Ferriot is a US contract producer of electrical enclosures and industrial product systems assembly, as well as plastic injection molding. Ferriot has been synonymous with engineering and precision manufacturing since 1946. Ferriot offers end-to-end product development support—from concept and design through tooling, molding, painting, and assembly—positioning Ferriot as the partner of choice for OEMs for electronics, automotive, and medical device companies.
With its years of heritage, Ferriot boasts a high-tech manufacturing facility with advanced molding presses, robotized automation, and in-house tooling. Its product offerings encompass high-performance resins such as ABS, polycarbonate, and glass-filled nylon for power and precision applications in high-performance products.
Ferriot’s ISO 9001-certified process includes start-to-finish traceability and process control priority throughout the production process. Ferriot offers customized enclosure solutions to customer applications through technical capability, customer-focused service, and turnkey project management.
Website: https://www.ferriot.com/
Year established: 1946
Location: Akron, Ohio, USA
Products:
- Electrical enclosures
- Plastic housings
- Custom molded parts
- Assemblies and subassemblies
Top 2: TenX Manufacturing

TenX Manufacturing is an American injection molder with a history of producing high-grade plastic enclosures for the industrial and electrical markets. It has been an OEM-approved manufacturer for achieving sensitive, wear-resistant molded components with close tolerances since 1980. TenX is a vertically integrated services company that provides design support, quick prototyping, mold building, and secondary finishing.
It is customer-oriented with state-of-the-art mold machines, robot automation, and lean production management to guarantee efficiency and consistency. Its technological strengths include overmolding, insert molding, and special coloration with flexible solutions for specialized uses such as control panels, switch boxes, and enclosures of electronic devices.
TenX Manufacturing cares the most about quality and innovation. Its engineers collaborate closely with customers to design for manufacturability and reduce cost, and each enclosure will be constructed to look and function its best.
Website: https://tenxmanufacturing.com/
Year established: 1980
Location: United States
Products:
- Electrical enclosures
- Custom injection molded parts
- Control box housings
- Insert molded components
Top 3: Holly Plastic

Holly Plastic, established in 2000 and based in China, is a leading custom plastic component and electric enclosure manufacturer. Holly Plastic provides precision injection molding, mold design, and one-stop shopping assembling service to electronic, automotive, and consumer product customers. Holly Plastic has advanced machinery and skilled engineering teams, enabling large-scale production as well as small-lot customized mass production with stable quality consistency.
It boasts several high-tonnage injection molding lines and automated material handling. The corporation manufactures various engineering materials such as PC, ABS, and PA66 to make enclosures rigid and heat-resistant for demanding environments. Added value service includes silk-screen printing, ultrasonic welding, and specialty packaging by Holly Plastic.
With the ability to bring R&D, tooling, and molding under one roof, Holly Plastic is essentially a stable global supplier to North American, European, and Asian buyers. Customer satisfaction and continuous improvement ensure long-term alliance and uniformity.
Website: https://www.hollyplasticparts.com/
Year established: 2000
Location: Zhejiang, China
Products:
- Electrical enclosures
- Plastic molded parts
- Custom housings
- Precision injection molds
Top 4: Gregstrom

Gregstrom Corporation is a US plastic molding firm founded in 1946. The firm has its headquarters in Woburn, Massachusetts, and provides rotational as well as injection molding solutions to users of high-quality, rugged plastic enclosures and industrial cases. Gregstrom has expertise in complex geometry, large parts, as well as custom-engineered parts with prototype as well as production capacity.
Its processing is aided by sophisticated molding equipment and in-plant mold-building capabilities for speedy turnaround and strict quality control. Gregstrom’s staff labors closely with customers to assist in designing, assembling, and secondary finishing their products. As part of its full-service strategy, the firm takes complete project management from design to delivery.
Gregstrom’s strong point is the coordination of frontier-level manufacturing technology and custom-made craftsmanship. The company enjoys stable and quality long-term business relationships in the electrical, transport, and environmental system markets.
Website: http://gregstrom.com/
Year established: 1946
Location: Woburn, Massachusetts, USA
Products:
- Electrical enclosures
- Rotationally molded parts
- Custom injection-molded housings
- Plastic assemblies
Top 5: SIMCO

SIMCO, or SIMCO Enclosures, is an American company founded in 2008 with a sole focus on the manufacturing of standard and custom plastic enclosures for electrical and electronic uses. SIMCO is a worldwide brand name in its niche market based on its precision-molded ABS and polycarbonate enclosures, which serve industrial electronics, sensors, and control systems.
The advantage of SIMCO is the multi-functionality and speed of customization. SIMCO offers a variety of standard enclosures with room for custom design in terms of CNC machining, digital print, and laser engraving. This offers an opportunity window for the customer to introduce custom designs at a cost economy relative to tooling.
SIMCO products are made exclusively in the USA, subject to strict quality control. Offering design customization, quick lead times, and responsive customer service, SIMCO invites OEMs and engineers with a need for quality, reliable plastic enclosures for electrical and electronics applications.
Website: https://www.simcobox.com/
Year established: 2008
Location: Florida, USA
Products:
- Electrical enclosures
- Plastic project boxes
- Instrument cases
- Custom-molded housings
Top 6: Woodland Plastics

Woodland Plastics is an Illinois-based custom injection molding firm. It’s an electrical enclosure and precision-molded parts for an industrial and electronics firm. It opened its doors in 1996. It brings decades of technical expertise together with the latest available production technology to create high-quality, consistent products. Woodland Plastics’ services run the gamut from the energy, automotive, electronics, and lighting industries to prototype through high-volume molding.
It has a 35- to 600-ton state-of-the-art computerized press facility. It has in-house engineering capability with design-for-manufacturability support, mold design, and materials expertise to maximize every project. Woodland Plastics creates rugged and reliable enclosures out of a variety of thermoplastic resins, including PC, ABS, and glass-filled compounds.
ISO 9001 registered, process control, traceability, and continuous improvement oriented, customer-focused, with robust engineering support behind it, a business partner of choice to customers requiring precision-molded electrical enclosures and components.
Website: https://woodlandplastics.com/
Year established: 1996
Location: Addison, Illinois, USA
Products:
- Electrical enclosures
- Custom plastic housings
- Injection molded components
- Industrial covers and panels
Top 7: Plastic Molded Concepts (PMC)

Plastic Molded Concepts, or PMC, is an American leading injection molding firm via the manufacture of engineering-grade thermoplastics. PMC was founded in 1975 and has its corporate base in Eagle, Wisconsin, with many years of experience serving the electrical, defense, and industrial markets. PMC is renowned for technical expertise in molding difficult, high-performance materials accurately and dependably.
PMC operates the latest technology molding facility with 35 to 500 ton presses and can perform advanced molding operations like insert molding, overmolding, and gas-assisted molding. PMC also has tool design and maintenance in-house for run-to-run consistency and quality.
Through specialization in high-demand applications and specialty engineering services, PMC allows customers to challenge product performance boundaries. It has an ISO 9001 certified quality system and registered ITAR, testifying to its pursuit of excellence and dependability.
Website: https://pmcplastics.com/
Year established: 1975
Location: Eagle, Wisconsin, USA
Products:
- Electrical enclosures
- Engineering thermoplastic components
- Insert molded parts
- Industrial housings
Top 8: Phoenix Mecano Solutions AG

Phoenix Mecano Solutions AG, Stein am Rhein, Switzerland, the world market leader in the manufacturing of industrial and electronic enclosures, founded in 1990, is a subsidiary of Phoenix Mecano Group. The company distributes the products to the automation sector, energy sector, and communications technology sector. The company produces enclosures, injection-molded and die-cast, which are protective, tough, and easy to install.
Phoenix Mecano offers turnkey design-to-manufacture solutions with finishing, 3D modeling, and prototyping. Phoenix Mecano’s custom and modular enclosure solutions can be offered in ABS, polycarbonate, and aluminum materials. Phoenix Mecano enclosures offer global protection grades such as IP65 and IP67, and offer protection even in harsh environments.
Proud to be technologically accurate in engineering modularity and product, Phoenix Mecano provides customers with flexible, creative, and reliable box solutions. With its international operations, it can supply efficiently as well as provide technical support anywhere in the world, in Europe, Asia, and North America.
Website: https://www.phoenix-mecano.ch/en/home/
Year established: 1990
Location: Stein am Rhein, Switzerland
Products:
- Electrical enclosures
- Industrial housings
- Custom molded parts
- Automation system components
Top 9: Custom Design Technologies

Custom Design Technologies (CDT) is a UK corporation founded in 1986 and is involved in high-precision plastic injection moldings and product design for the electrical and electronics sectors. The company has the entire design, tooling, molding, and assembly service facility under one roof and has the advantage of being in a position to provide economy-driven solutions for small to medium-sized production orders.
CDT is a control system enclosure, sensor, and communications hardware specialist design company. It collaborates with clients from concept through delivery, each design specifically designed for performance, manufacturability, and cost. It has a world-class manufacturing facility that has computerized presses and on-site toolmaking to provide short lead times and quality.
Innovations and customer satisfaction have been the priority of CDT in catering to high-strength and high aesthetic requiring industries with their offerings. As an OEM-friendly company with a quality and flexible molding facility with all the services offered, it is an exemplary mold shop.
Website: https://www.customdesigntechnologies.com/
Year established: 1986
Location: England, UK
Products:
- Electrical enclosures
- Custom molded housings
- Plastic assemblies
- Electronic device covers
Top 10: Baytech Plastics

Baytech Plastics, a 1946 founding pioneer custom injection molding firm with an Ontario, Canada-based headquarters, is a one-stop-shop product design full-service supplier, end-to-end in assembly. Baytech has been a trusted customer partner in the electrical, medical, and industrial industries, requiring strong and visually appealing enclosure solutions.
It boasts two large production facilities with over 50 injection molding machines ranging from 40 to 2,000 tons. Baytech has focused on insert molding, gas-assisted molding, and multi-shot molding to produce high-precision and intricate components. It performs secondary operations like assembly, painting, and decorating for turnkey shipment.
Baytech Plastics is ISO 9001 certified and a highly regarded leader in engineering ingenuity, customer partnership, and intolerance for quality. Strategic alignment and extensive technical proficiency position it as one of North America’s leading injection molding partners for electrical enclosures.
Website: https://www.baytechplastics.com/
Year established: 1946
Location: Ontario, Canada
Products:
- Electrical enclosures
- Plastic housings
- Multi-shot molded components
- Custom injection molded parts
3. The Most Important Considerations When Selecting an Injection Molding Partner for Electrical Enclosures
It’s not about price—obtaining the right injection molder for electric enclosures is about performance, quality, and reliability down the road. To make the right choice, customers need to determine technical ability and customer service ability before entering into a relationship.
1) Material Knowledge and Engineering Support
One is the technical competence of electrical enclosures on the part of the supplier. Material strength like ABS, PC, PA66, and PBT, would be utilized as a matter of course because they would have to have strength, insulation, and heat resistance requirements. An experienced builder not only would recommend the right material but also would provide technical advice in terms of wall thickness, draft angles, and reinforcement requirements in trying to construct a stronger, structurally sound enclosure.
2) Process Control and Accuracy
Consistency in production is crucial. Automatic inspection and web-based inspection systems for firms with advanced injection mold technology and stringent process control. ISO 9001 or IATF 16949 are excellent indications of quality monitoring and traceability in the production process.
3) Design and Customization Capability
Current electric enclosures will probably need custom function and appearance designs—like EMI shielding, ventilation holes, or water seals. In-cubed tooling capacity providers and rapid prototyping and design-for-manufacturability (DFM) capability can reduce lead time and development cost dramatically.
4) Value-added Services and Supply Reliability
In addition to molding, post-process activities such as printing, assembly, and packaging contribute to value addition. The supplier should have a stable supply of raw material, flexible manufacturing capacity, and strong logistics support so that it can provide timely delivery.
Business enterprises can select a partner for molding based on these technical and operational factors and capabilities in design, innovation, and sustainable development.
4. Conclusion
Injection moulding is no laughing matter when it comes to crafting high-performance and long-lasting electrical enclosures, which are used globally across industries. The above-mentioned are some of the leading manufacturers with global recognition for innovative thinking, careful engineering, and focus on quality. They have earned a reputation as producers of first choice in material quality, tool design, and optimizing production from North America to Europe and Asia. Since the demand for industrial automation and smart products is growing, they are well placed to offer cheap and good-quality enclosure solutions for newer electrical and electronics applications.
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