What is over-molding?

What is over-molding?

Over-molding is a unique molding process that can combine multiple materials into a single part or product. It is commonly used to produce consumer electronics and industry equipments. SuNPe provides plastic overmold plastic, plastic overmold metal, rubber overmold plastic services for prototyping and production.

What kinds of Over-molding can do at SuNPe?

The over-molding process produces chemically bonded parts made using various materials. Depending on the materials, we can make the following types of over-molding:


● Plastic Over Plastic - The substrate is rigid plastic. Then another rigid plastic is molded onto or around the substrate. In this way, it can help to improve the ergonomics of a product, manufacture the product in different colors and resins. ●Rubber and plastic overmolding - Different with plastic over plastic, the second mold plastic rubber, not rigid plastic. It is not only can combine different colored parts, also can fixing of rubber grips onto the stiff handle, which can add the flexibility to rigid parts, help to realized the functional of the parts.
  ●Plastic and metal overmolding

The first substrate is metal, then rigid plastic will be molded around the substrate. This is often used for insert installing, which also called inserts over-molding. ●Rubber and metal overmolding

Compared with insert molding, the second plastic changed from rigid plastic to rubber. The first metal part can be produced by formed, CNC machining, die casting.

What technologies can SuNPe use to over-molding?

Vacuum Casting - When the product is in the premise research and development and testing stage, the number of required is not large, vacuum casting is the most affordable way to do over-molding, which is suitable for prototyping projects under 100 pieces.
Injection molding - For low-volume production and mass production projects, it has obvious benefits on time and cost, which can bring the products to the market in a short time.

Please feel free to contact us to know more about our overmolding service.