Custom Injection Molded Enclosures

Midwest Molding, Inc. delivers custom injection molded enclosure manufacturing for demanding automotive, electronics, consumer goods, and appliance applications. From tooling design through production, experienced engineers support complex plastic components, multi-material construction, inserts, overmolding, and assembly. Bartlett-based manufacturing capabilities help U.S. product teams pursue consistent quality, integrated production, and cost-conscious part optimization.

Technician inspecting a custom injection molded plastic enclosure in a manufacturing facility

Our Enclosure Manufacturing Services

Integrated tooling, molding, insert, overmolding, and assembly capabilities support complex custom enclosure programs.

Tooling Design & Build

Cradle-to-grave tooling design and build support covers prototype and production tools, mold flow analysis, ES testing, and part re-formulation for cost-saving opportunities.

Straight Injection Molding

Straight injection molding supports complex components and assemblies for automotive, transportation, electronics, and consumer goods applications, with project engineering and quality assurance support.

Two-Shot Molding

Two-shot molding produces complex components with multiple materials or colors molded together in a single cycle, supported by engineering from tooling through production ramp-up.

Pre-Mold & Overmolding

Pre-mold and overmolding injects plastic over existing parts, substrates, or inserts to create multi-component assemblies with precision equipment and quality control systems.

Insert & Composite Molding

Insert and composite molding combines materials through injection molding to create complex components, with engineering support for tooling, project management, and process optimization.

Multi-Component Assembly

Multi-component assembly combines injection molded parts with additional components into complete assemblies, supported by error proofing and redesign optimization for functionality and cost.

Integrated Manufacturing Support

Build Enclosures For Complex Applications

Custom enclosure programs benefit from a coordinated path across tooling, molding, and assembly. Midwest Molding, Inc. supports complex plastic component designs with straight injection molding, two-shot molding, insert and composite molding, pre-mold and overmolding, and multi-component assembly. Its Bartlett, Illinois facility provides a broad manufacturing platform for automotive, electronics, consumer goods, appliance, and other demanding U.S. applications.

Custom molded enclosure components arranged near an injection molding machine
The Midwest Molding Difference

Why Choose Midwest Molding, Inc.?

A coordinated manufacturing partner for complex plastic components, assemblies, and tooling.

Integrated Capabilities

Access molding, assembly, and welding capabilities from one manufacturing provider for coordinated component programs.

Experienced Management

An experienced management team brings an average of more than 35 years of manufacturing industry experience.

Quality Systems

Quality and environmental management certifications support injection molding production for demanding manufacturing applications.

Recognized Performance

Delphi recognized the company for quality, delivery, service, and competitive cost performance.

Meet The Manufacturing Team

Experienced professionals support complex molding, assembly, and tooling programs.

Midwest Molding, Inc. is a specialized plastic injection molding and assembly manufacturer headquartered in Bartlett, Illinois. The company’s experienced management team supports long-term growth across the automotive, transportation, electronics, consumer goods, appliance, HVAC, and other manufacturing industries it serves. Its capabilities span injection molding, tooling, assembly, and welding, helping customers coordinate complex plastic components and integrated assemblies through one manufacturing provider. Midwest Molding supports programs from prototype and production tooling through molding and assembly, with dedicated project engineering for complex molded components. The company’s quality and environmental management certifications, modern fully electric manufacturing facility, and history of supplier recognition support its focus on precision plastic molding and assembly for demanding manufacturing needs.

ExperienceManagement team averages more than 35 years
RecognitionDelphi Pinnacle Award received in 2005
HeadquartersBartlett, Illinois manufacturing facility

Frequently Asked Questions

What are injection molds used for?

Injection molds are used to form plastic materials into repeatable parts and components. In enclosure manufacturing, molds can create housing sections, covers, structural features, and integrated component designs. The mold is developed around the part requirements, material approach, and production goals. Midwest Molding supports tooling design and build, mold flow analysis, prototype and production tools, and part re-formulation for cost-saving opportunities.

Can Midwest Molding manufacture custom plastic enclosures?

Does Midwest Molding provide tooling design and build?

What is two-shot molding used for?

What is overmolding?

Can molded enclosures include metal or other inserts?

Does Midwest Molding support projects from prototype through production?

What industries does Midwest Molding serve?

Have Questions About Your Enclosure?

Talk with Midwest Molding about tooling, molding, and assembly requirements.

Certified & Recognized

Awards and Recognition

IATF 16949 certification recognition

IATF 16949

Certification listed by Midwest Molding, Inc.

ISO 14001:2015 certification recognition

ISO 14001:2015

Certification listed by Midwest Molding, Inc.

ISO 14001:2004 certification recognition

ISO 14001:2004

Certification listed by Midwest Molding, Inc.

ISO 9001:2008 certification recognition

ISO 9001:2008

Certification listed by Midwest Molding, Inc.

ISO/TS 16949:2009 certification recognition

ISO/TS 16949:2009

Certification listed by Midwest Molding, Inc.

Start Your Custom Enclosure Project

Share your part, tooling, molding, or assembly requirements with Midwest Molding’s project team.

Contact Us Today

For immediate assistance, feel free to give us a direct call at 224.208.1110.