What’s the difference between custom molding and custom over-molding?

Custom over-molding services are when we apply polymers to a mil spec (military specification) connector. The polymer provides a coating over the connector and bonds the connector to the cable jacketing. Custom molding services are when the molded polymers provides the structure for the individual conductors. A typical male or female connection you find at the end of an extension cord would be an example of a custom molding operation.

Any molding on cords is called “insert injection molding” because unlike a fully closed mold, the injection molds used to work on cords have to allow the cord or cable to stick out of the mold.