Custom Molded Electrical Connector Manufacturing

An insert is a pre-existing component placed into a mold before plastic is injected. The molding material flows around the insert and forms it into the finished part, creating an integrated component that can combine metal, electrical, or other substrates with molded plastic. Insert molding is commonly used for connectors, terminals, contacts, sensors, switches, and related assemblies.

Insert molding places a component, such as a terminal or metal contact, into the mold before plastic is injected around it. Overmolding generally applies plastic over an existing part, substrate, or previously molded component. Both processes create multi-component assemblies, but the distinction typically relates to whether the component is positioned as an insert during molding or is an existing substrate being covered.

Connector categories can be organized in several ways depending on the application. Common groupings include wire-to-wire, wire-to-board, and board-to-board connectors. Other classifications may focus on electrical function, terminal style, mounting method, or environmental requirements. The appropriate design depends on the required connection, housing geometry, materials, assembly method, and operating conditions.

Midwest Molding supports custom molded electrical connector programs using insert molding, overmolding, two-shot molding, reel-to-reel continuous strip molding, tooling, and assembly capabilities. The company serves electrical connector and terminal manufacturers, sensor and control device OEMs, automotive suppliers, and other manufacturers requiring integrated molded components or finished assemblies.

Insert molding can combine injected plastic with pre-existing components such as stamped metal strips, terminals, contacts, wires, or electronic inserts when the design and process requirements are appropriate. Material selection depends on the application, insert geometry, required function, and molding conditions. Midwest Molding’s project engineering team can support design, tooling, and process evaluation.

Yes. Midwest Molding provides tooling design and build services for prototype and production tools. Support includes cradle-to-grave project management, mold flow analysis, ES testing, dedicated project engineering, and part re-formulation opportunities. This approach helps coordinate tooling decisions with molded part design, production requirements, and potential cost-saving opportunities.

Midwest Molding serves automotive, transportation, electronics, consumer goods, appliance, HVAC, and related manufacturing applications identified in its customer segments and service capabilities. Its work includes molded components, electrical connectors, wire harnesses, integrated assemblies, and tooling for companies that require coordinated engineering, molding, and production support.

You can contact Midwest Molding at 224.208.1110 or submit an inquiry through mwmolding.com. Useful project information may include connector drawings, insert or terminal details, expected assembly requirements, tooling status, target application, and production objectives. The company’s project and manufacturing engineers can then review the requirements and identify relevant molding, tooling, or assembly capabilities.