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Undercuts

insert molding

An injection mold undercut is any indentation or protrusion that prohibits an ejection of a part from a one-piece mold.

  • Reducing the number of undercuts often helps to reduce the initial cost of tooling.
  • If possible utilize other mold design features that can offer similar operation without the need of moving slides.

At Xcentric we have the capability of producing your custom parts with any number of undercuts. Our precision tooling and mold making technologies allows us to provide you the highest quality service that delivers the most complex plastic injection molded parts in the industry.

Most commonly categorized by either an internal undercut or external undercut and requires an extra component of the mold to capture the detail.

Injection Molding Undercuts are features that prevent a straight ejection at the parting line of your mold.

Undercuts typically lead to increased mold complexity and can lead to higher mold construction costs.

A simple re-design or modification can often eliminate or reduce the number of undercuts a part has and can potentially save you in tooling costs, leading to better designed plastic parts and a more efficient molding process.

When an undercut feature simply cannot be removed from the part design, the tooling will most likely require internal mold mechanisms to help facilitate the ejection.