Injection Molding worked example

Mold Temperature Delta with higher temperature reading of 21 °C: a worked example

This worked example runs the mold temperature delta numbers for a tougher week than the baseline: higher temperature reading of 21 °C instead of the typical 42 °C. Calculate the temperature difference between mold halves or between coolant inlet and outlet to diagnose uneven cooling.

The inputs for this scenario

  • Higher temperature reading: 21 °C (the input this scenario stresses; the baseline uses 42)
  • Lower temperature reading: 35 °C (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Temperature delta = Higher reading - Lower reading.
  • Temperature delta works out to -14 °C at these inputs, and this is the headline figure for the scenario.
  • Higher reading works out to 21 °C at these inputs.
  • Lower reading works out to 35 °C at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where higher temperature reading sits at 42 °C and the headline result is 7 °C, this scenario comes in 300% below the baseline at -14 °C.
  • Use it during process qualification, mold cooling checks, or troubleshooting warp and dimensional drift. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Temperature delta: -14 °C (headline result)
  • Higher reading: 21 °C
  • Lower reading: 35 °C

Run it with your numbers

  • To rerun this with your own numbers, open the live Mold Temperature Delta calculator, set higher temperature reading to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.