Injection Molding Clamp Tonnage Calculator
Calculate required clamping force for injection molding from projected part area, cavity pressure, number of cavities, and runner system.
Inputs
%
Results
Clamp force (metric tonnes)
63.5
Clamp force (US tons)70
Clamp force (kN)623
Total projected area (cm²)165
Runner area (cm²)15
Specific tonnage (t/cm²)0.39
Recommended machine (tonnes)80
How to Use This Calculator
- Enter Part length (mm), Part width (mm), and Cavity pressure (bar).
- Set Number of cavities, Safety factor, and Runner area (%).
- Review the Clamp force (metric tonnes) result.
- Use Clamp force (US tons) and Clamp force (kN) to inform your decision.
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