Manufacturing Engineering
Injection Molding Tonnage Simulator
Determine the required clamp force (tonnage) for injection molding. Analyze the flow properties of your material, cavitation effects, and safety margin offsets.
Method
Projected Area
Industrial Standard
Total Area
200 in²
Cavities combined
Output
CSV
Export ready
Specifications
Material Preset
Molding Cycle Sweep
Clamp Tonnage Model
Base Clamping Tonnage (T_base)
T_base = Area * Cavities * Material_Factor
Safety Tonnage (T_safety)
T_safety = T_base * 1.15
Clamping Pressure (P_clamp)
P_clamp = Material_Factor * 13.79 (MPa)
The Projected Area represents the 2D footprint of the cavity perpendicular to the clamping direction.
The Material Factor captures polymer flow viscosity resistance; higher viscosity requires higher injection pressures and higher clamp forces.
Safety tonnage includes a 15% allowance to prevent flash defects due to process fluctuations.
Molding Clamp & Cavity Diagram
Safety Tonnage (+15%)
690tons
Base Tonnage
600tons
Combined Projected Area
200sq in
Flow Resistance
41.4MPa
Tonnage Requirements vs Part Area
Tonnage Scaling Table
| Projected Area (in²) | Base Tonnage (tons) | Safety Tonnage (tons) |
|---|---|---|
| 10.0 | 120 | 138 |
| 29.0 | 348 | 400 |
| 48.0 | 576 | 662 |
| 67.0 | 804 | 925 |
| 86.0 | 1032 | 1187 |
| 105.0 | 1260 | 1449 |
| 124.0 | 1488 | 1711 |
| 143.0 | 1716 | 1973 |
| 162.0 | 1944 | 2236 |
| 181.0 | 2172 | 2498 |
| 200.0 | 2400 | 2760 |