Injection Molding Tonnage Calculator
Clamping force = projected area × cavities × clamping pressure factor. Auto machine recommendation.
💡 Experience Reference
- Formula: F(tf) = projected area(cm²) × cavities × clamping factor(tf/cm²)
- Typical factors: PE/PP 0.3–0.4; ABS/PS 0.4–0.5; PC/PA 0.5–0.7; GF reinforced 0.7–0.8
- Leave 30% margin when selecting a machine (clamping force ≥ calculated ÷ 0.7)
- High flow-length ratio and deep cavities: raise the factor; include runner projection for multi-cavity molds