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Overmolding vs. Insert Molding

Name Detail
Size 78.74in. x 59.05in. x 39.37in.
2000mm x 1500mm x 1000mm
Mold Cavities Single or multi-cavity
Mold Life Unlimited (We will open a new mold if the old one worn out)
Mold Storage Forever
Mold Material P20 Steel
General Tolerance Normally +/- 0.008in.(0.2mm)

Overmolding Material

Substrate material for overmolding

Overmolding is commonly used to encapsulate one material (usually a softer or elastomeric material) over another rigid substrate. The most common substrate material for overmolding is thermoplastic, these material provides a stable base of overmolded components, the most common substrate material include:

  • ABS
  • PC
  • Nylon
  • PP
  • ABS/PC

Bonding material for overmolding

The most common overmolded material is thermoplastic elastomer, known for its flexibility, resilience, and compatibility with various substrates. Some other common bonding materials include:

  • TPE
  • TPU
  • TPV
  • Silicone

Why Choose Us

FAQs of Overmolding and Insert Molding

What is the difference between overmolding and insert molding?

Overmolding involves injecting two shots of materials to form the substrated and the overmold. Insert molding only involves injecting one shot of molten plastic, though the metal insert needs to be purchased or created separately.

Two-shot molding usually only makes sense for larger production runs, whereas overmolding is better for low volume production runs.

Overmolded parts are made in two-step process. This increases part cycle time and is thus more expensive than molding a single part with no overmolding.

Insert molding is often used to add a plastic layer on top of a metal one, for example, to add a plastic handle to a metal screwdriver. Jiangzhi can also use insert molding to manufacture insulated pipes, wiring, and other similar products, or embed electronics into plastics.

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