Custom Plastic Over Molding

BHM is a leader in over mold tooling and custom over molding.

Plastic Over Molding is a plastic injection molding process in which one thermoplastic material is molded over another material to form one part.

Using two separate plastic injection molds on the plastic injection molding press, two materials are boned together during the plastic over molding process to form plastic parts and components with unique visual or ergonomic appeal, such as handles and knobs.

Plastic overmolding technology is applied to a wide range of aesthetic and functional purposes in many industries, such as medical devices, appliances, electronics, consumer, agricultural and automotive productions and components.

A wide range of thermoplastic materials can be overmolded, including soft plastics such as urethances and thermoplastic elastomers(TPE), and hard plastics such as nylon and polycarbonate.

Custom plastic overmolding is also used to strengthen, protect and improve a part or end product, white reducing cost, labor and materials.

Advantages Reduced secondary operation, assembly and labor costs Molded as one assembly Eliminates bonding step in the manufacturing process Improved component reliability Plastic overmolded components ensure proper alignment, prevents loosening and the plastic resin can provide improved resistance to vibration and shock Improved part strength and structure Enhanced design flexibility and multi-material components Custom plastic overmolding allows for production of parts molded of multiple thermoplastic materials

Applications Custom overmolded plastics provide competitive advantages in a wide range of applications, including: Medical devices and instruments Parts with soft grip handles Knobs for appliances, controls and assemblies Encapsulated electronic devices and electrical components Window reveal moldings