Material Combinations


Deringer-Ney is a leading producer of insert molded components utilized in a variety of medical and industrial applications.


Da/Pro Rubber has expertise in both rubber molding and plastic molding. Below are a few pointers when considering rubber to plastic molding.

  • Rubber molding requires very high temperatures and most plastic components would melt at these temperatures. Rubber-to-plastic molding requires a plastic insert made with a high temperature plastic. 
  • Rubber-to-plastic molding is used in many valve and diaphragm applications where rubber alone would not allow the structural integrity required for the valve or diaphragm. Overmolding rubber-to-plastic incorporates the flexibility, toughness, solvent and chemical resistance of rubber (is lightweight) and has cost savings of plastic.
  • When designing parts with a rubber-to-plastic molding requirement, it is best to design the rubber overmold to completely cover the plastic insert. This will help prevent deformation, discoloration of the plastic insert and excessive flashing of the rubber overmold.


Consistent rubber metal bonding parts are easily produced using the Da/Pro Process for rubber-to-metal bonding. Rubber-to-metal products are molded to meet stringent customer design requirements and quality demands. The elastomer is attached to the substrate by mechanical and/or chemical bonds. In chemical bonding, the rubber is vulcanized and rubber bonded directly to the metal or plastic substrate during the molding process.