Custom Overmolding Services for U.S. Manufacturers

Overmolding is an injection molding process that places plastic material over a pre-existing part, substrate, or insert. The result is a multi-component assembly created through a coordinated molding process. Applications can include complex plastic components for automotive, transportation, electronics, appliance, and consumer goods uses. Midwest Molding supports overmolding with engineering, dedicated equipment, tooling, and quality control systems.

Plastic mold cost varies according to the component design, tooling requirements, materials or inserts, production expectations, and engineering needs. Midwest Molding provides tool build support for prototype and production tools, including mold flow analysis, ES testing, and part re-formulation opportunities. A project review is needed to develop a cost appropriate to the requested tool and application.

Mold usage depends on the tool design, construction, materials, production conditions, maintenance, and the requirements of the molded part. Midwest Molding manages prototype and production tool build, with new tooling guaranteed for the life of the program. The appropriate tooling approach can be evaluated alongside the part design, expected production needs, and process requirements.

Midwest Molding’s pre-mold and overmolding service can inject plastic over pre-existing parts, substrates, or inserts to create multi-component assemblies. The suitable part design depends on its geometry, insert or substrate characteristics, material compatibility, and functional requirements. The company’s engineering team can provide guidance on molding processes and parameters for complex molded components in automotive, transportation, electronics, appliance, and consumer goods applications.

Two-shot molding produces components with multiple materials or colors molded together in a single cycle. Overmolding injects plastic over a pre-existing part, substrate, or insert. Both approaches can support multi-component designs, but the best fit depends on the component architecture, material requirements, tooling strategy, and production objectives. Midwest Molding provides both capabilities with project engineering support.

Yes. Midwest Molding provides cradle-to-grave project management for prototype and production tool build. Support includes mold flow analysis, ES testing, part re-formulation for cost-saving opportunities, and dedicated project engineering for complex molded components. Tooling services can be coordinated with overmolding, insert molding, two-shot molding, and production ramp-up requirements.

Midwest Molding supports automotive, transportation, electronics, consumer goods, and appliance manufacturing applications with complex molded components and assemblies. Its services address complex plastic components, inserts, overmolded assemblies, wire harnesses, and multi-component products. The team can coordinate molding, tooling, assembly, and process optimization for engineering-led production programs.

To begin, share the component or assembly requirements, existing inserts or substrates, design information, production objectives, and any tooling needs with Midwest Molding. The team can review the application and determine whether pre-mold and overmolding, two-shot molding, insert molding, tooling support, or another capability is appropriate. Contact Midwest Molding at 224.208.1110 or through mwmolding.com.