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: Plastic Injection Molding

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Pros / Cons

Advantages:

  • It provides rapid production rates.
  • Intricate parts, molded-in color, and finished parts can be produced.
  • Little mold wear occurs even after manufacturing millions of parts.
  • It creates lightweight parts, of a specific color, with built in surface texturing, in a single operation of the injector.
  • If duplicate cavities are present in a single mold, more than one part can be produced per operation. Moreover, multiple part cavities in a single mold might give all the parts needed for an entire assembly- like a model airplane kit.

Disadvantages:

  • Tooling is very expensive, small quantities are not economical.
  • Large parts are not possible.
  • To avoid flash production, large clamping forces are needed-which requires more expensive injection machines.