Undercuts Design Guide for Injection Molding

Undercuts Design Guide Resource

An undercut is any indentation or protrusion that prohibits part ejection from a straight-pull mold. It cannot be captured with the cavity and core alone. Though they add complexity to a mold and can increase production costs, parts sometimes require undercuts and side actions to achieve the expected fit, form, and function.

Complete the form to download our two-page Undercuts Guide which covers:

  • Design modifications that can help to minimize the need for undercuts/side actions
  • Design tips to design complex features to optimize the molding process when using undercuts/side actions
  • Little known facts to improve effectiveness of molding undercuts

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