The direct injection process is a manufacturing technique where molten material is injected directly into a mold to create a finished product or component.
Understanding Direct Injection
Direct injection (DI) is a specialized molding process. According to the provided reference, it involves injecting a molten material – typically Thermoplastic Rubber (TPR), Polyvinyl Chloride (PVC), or Polyurethane (PU) – into a mold cavity. This allows the material to take the shape of the mold.
Key Aspects of Direct Injection:
- Material Used: Common materials include TPR, PVC, and PU due to their thermoplastic properties.
- Applications:
- Production of outsoles for shoes.
- Creation of decorative details on products.
- Direct attachment of outsoles to uppers in footwear, known as DIP (Direct Injection Process).
- Process: The molten material is injected under pressure into the mold cavity, ensuring complete filling and precise shape formation.
- Advantage: Can streamline manufacturing by directly joining components without adhesives or additional steps.
Direct Injection Process (DIP) in Footwear
A significant application of direct injection is in footwear manufacturing. Here, it's known as the Direct Injection Process (DIP), where the outsole is directly molded and attached to the upper.
Benefits of Direct Injection:
- Efficiency: Reduces the need for separate adhesive bonding.
- Durability: Creates a strong and lasting bond between components.
- Design Flexibility: Allows for complex and integrated designs.
