This type of plastic overmolding, sometimes called two-shot, multi-shot, or double-injection molding, adds additional material such as thermoplastic elastomer (TPE) to plastic substrates to improve the aesthetics, handling characteristics, grip, impact resistance, or environmental resistance of injection molded parts. The over molding process is usually performed by way of multi-barrel injection molding machines, the process adding additional material shortly after the substrate is formed to create strong bonds between materials. Plastic over molding serves to eliminate steps in the manufacturing process while creating enhanced injection molded products.hat is two-shot molding?
Two-shot molding is an injection molding process used to create multi-layer, multi-material, or multi-colored parts with a single process. This process is sometimes referred to as: 2K, multi-layer or multi-shot injection molding. Multi-shot manufactured products eliminate steps in the manufacturing process while creating a more cost effective enhanced finished product.
Advantages of the Multi-shot process include:
- Lower product costs
- Decreased cycle time
- Reduction in handling and secondary processes resulting in lower labor costs
- Complete finished product with no additional assembly steps
- Creation of complex products with improved cosmetics in a single process
- Soft touch materials molded over a more rigid substrate creates a strong and aesthetically pleasing finished product