What is Overmolding ?
Overmolding is an injection molding process for creating one single part using two or more materials. This process is also known as two shot injection molding.
Advantages of Overmolding
Plastic overmolding offers following advantages :
- Improved Product Quality and Performance
Overmolding ensures proper alignment and rigid assembly of products.
- Reduced Secondary Operation
Overmolding eliminates secondary assembly operation. That results in labor and part handling cost saving.
- Eliminates Fasteners and Adhesive
Since parts are assembled during injection molding. Use of fasteners and adhesives is eliminated.
- Reduced Cost
Elimination of secondary operation and fasteners saves cost.
- Improve product ergonomics and User Experience
Overmolding rubber grips on mechanical tools improves design.
- Enhanced Design Flexibility
Complex assembly design and manufacturing of multi material parts is feasible with overmolding.
- Multi material Parts
Car headlights are manufactured in two materials (PMMA and ABS or PC) using overmolding.
- Multi Color Parts
To improve product aesthetics, multiple colors can be added in one part.
- Soft Grip Parts
Soft grip of TPU or silicon is molded over the plastic part. For example rubber grip on screw driver and tooth-brushes.
- Over molding Gaskets on Plastics
Complex gaskets can be overmolded over plastic parts itself.