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TOOL IDB-MEC-003
Clamp force estimator

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Injection molding clamp-force estimator

Tonnage from projected part area × material pressure factor × safety factor. For sizing the right injection machine.

Mold & tonnage F = A · p · k
Platen Part cavity · projected area
Engineering notes

Formula

  • F = projected area · material factor · safety factor
  • Use part + runner area if runner stays in cavity.
  • Confirm with mold flow + selected molder for final spec.

Result

Calculate

Estimated clamp force: 46.1 metric tons