Injection Molding for St Louis Manufacturers

Midwest Molding, Inc. supports St Louis manufacturers with precision injection molding, tooling, overmolding, insert molding, two-shot molding, and integrated assembly. From prototype and production tools through manufacturing, experienced project engineers help manage complex components, identify part re-formulation savings, and support demanding automotive, electronics, transportation, appliance, and consumer goods applications with reliable quality and delivery performance.

Electric injection molding machines producing precision plastic components in a modern manufacturing facility

Our Injection Molding Services

Integrated molding, tooling, assembly, and engineering support for complex plastic components and production programs.

Straight Injection Molding

Produce complex plastic components and assemblies with dedicated manufacturing cells, mold flow analysis, project engineering, quality assurance, and production support for demanding applications.

Prototype & Production Tool Build

Manage prototype and production tool build, with mold flow analysis, engineering support, ES testing, and part re-formulation for cost-saving opportunities.

Insert & Composite Molding

Combine plastic with inserts or other materials to create complex components for automotive, electronics, and consumer goods applications, supported by process optimization and dedicated tooling.

Pre-Mold & Overmolding

Mold plastic over existing parts, substrates, or inserts to create multi-component assemblies with precision, consistency, and dedicated quality control throughout production.

Two Shot Molding

Mold multiple materials or colors together in a single cycle to create complex components, supported by cradle-to-grave project management from tooling through production ramp-up.

Reel-to-Reel Strip Molding

Produce continuous-strip injection-molded components for automotive, electronics, and appliance applications with integrated quality control that segregates defects during production.

Integrated Manufacturing Support

Molding Solutions Built Around Your Program

Midwest Molding, Inc. helps manufacturers move complex molded components from program launch through production with coordinated tooling, engineering, molding, and assembly support. Its capabilities include straight injection, insert and composite molding, overmolding, two-shot molding, and reel-to-reel strip molding. For St Louis manufacturers evaluating a domestic production partner, the company combines project management, process optimization, and quality systems across one manufacturing provider.

Manufacturing engineer inspecting a molded plastic component beside an injection molding machine
The Midwest Molding Difference

Why Choose Midwest Molding, Inc.?

A specialized manufacturing partner for complex molded components and integrated assemblies.

Broad Capabilities

Access molding, assembly, and welding capabilities from one manufacturing provider for complex production programs.

Experienced Management

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

Quality Systems

Quality and environmental management certifications support consistent injection molding production and responsible operations.

Recognized Performance

Midwest Molding’s track record includes a Delphi Pinnacle Award in 2005.

Meet The Manufacturing Team

Experienced professionals supporting complex molding and assembly programs.

Midwest Molding, Inc. is a specialized plastic injection molding and assembly manufacturer supporting demanding manufacturing and automotive applications. Its experienced management team supports long-term growth across molding, assembly, and welding, with project engineering focused on complex components and integrated assemblies. The company serves manufacturers evaluating domestic production support for tooling, molding, and finished assemblies, including programs relevant to St Louis manufacturers. Its capabilities span prototype and production tooling, straight injection molding, insert and composite molding, overmolding, two-shot molding, reel-to-reel strip molding, and multi-component assembly. The team’s approach connects engineering, manufacturing, quality, delivery, and cost considerations throughout the life of a program.

ExperienceMore than 35 years average management experience
Facility120,000 sq. ft. manufacturing facility
Equipment55 fully electric injection molding machines

Frequently Asked Questions

What injection molding services does Midwest Molding provide?

Midwest Molding provides straight injection molding, insert and composite molding, pre-mold and overmolding, two-shot molding, and reel-to-reel continuous strip molding. The company also offers prototype and production tool build management, wire harness assembly, and multi-component assembly. Capabilities are supported by project engineering, tooling coordination, process optimization, and quality systems for complex components and integrated assemblies.

Can Midwest Molding support tooling from prototype through production?

What is two-shot molding used for?

What is the difference between insert molding and overmolding?

Does Midwest Molding work with St Louis manufacturers?

What industries does Midwest Molding serve?

How does Midwest Molding help reduce manufacturing costs?

How can I contact Midwest Molding about an injection molding project?

Have More Molding Questions?

Talk with Midwest Molding about your component, tooling, and production requirements.

Certified & Recognized

Awards and Recognition

IATF 16949 certification mark

IATF 16949

Quality management certification listed by Midwest Molding.

ISO 14001:2015 certification mark

ISO 14001:2015

Environmental management certification listed by Midwest Molding.

ISO 14001:2004 certification mark

ISO 14001:2004

Environmental management certification listed by Midwest Molding.

ISO 9001:2008 certification mark

ISO 9001:2008

Quality management certification listed by Midwest Molding.

ISO/TS 16949:2009 certification mark

ISO/TS 16949:2009

Automotive quality certification listed by Midwest Molding.

Plan Your Next Molding Program

Share your component, tooling, or assembly requirements and connect with Midwest Molding’s project engineering team.

Contact Us Today

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