Injection Molding worked example
Mold Cooling Time with maximum part wall thickness of 1.25 mm: a worked example
Suppose maximum part wall thickness falls to 1.25 mm. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate cooling time from melt temperature, mold temperature, part wall thickness, and material thermal properties.
The inputs for this scenario
- Maximum part wall thickness: 1.25 mm (the input this scenario stresses; the baseline uses 2.5)
- Cooling rate factor (thermal diffusivity based): 3.2 sec/mm² (held at the documented default)
- Thickness geometry exponent: 2 x (held at the documented default)
Working through the calculation
- The calculation starts from the formula this tool documents: Cooling time = Cooling rate factor x (Wall thickness ^ Geometry exponent).
- Result works out to 8 sec at these inputs, and this is the headline figure for the scenario.
- Thickness factor product works out to 8 value at these inputs.
- Multiplier works out to 1 x at these inputs.
- Factor A x B works out to 4 value at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where maximum part wall thickness sits at 2.5 mm and the headline result is 16 sec, this scenario comes in 50% below the baseline at 8 sec.
- It computes the cooling phase duration in seconds by multiplying the resin cooling factor by wall thickness raised to the geometry exponent. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.
Results at a glance
- Result: 8 sec (headline result)
- Thickness factor product: 8 value
- Multiplier: 1 x
- Factor A x B: 4 value
Run it with your numbers
- To rerun this with your own numbers, open the live Mold Cooling Time calculator, set maximum part wall thickness to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.