Injection molding · Process
Cooling Time Calculator
Estimate cooling time using a flat-wall heat-transfer model. This practical tool is an engineering estimate—validate decisions against machine, material, mold, and process data.
Formula and method
The flat-wall estimate scales with wall thickness squared and thermal diffusivity.
Inputs and units
Enter measured or specified values in the displayed units. Keep units consistent; results are rounded for practical planning. This first release uses the displayed engineering units rather than a unit-switcher.
Worked example
With 3 mm wall, 0.12 mm²/s diffusivity, 240°C melt, 60°C mold, and 95°C ejection, the flat-wall estimate is about 14.28 s.
Use this for a first thermal comparison
The flat-wall model helps compare wall thickness and temperature scenarios. It is not a cooling-channel design calculation.
What changes the result most
Maximum wall section, thermal diffusivity, melt temperature, mold temperature, and ejection criterion.
Common mistake
Assuming a calculated time proves a part can eject without warp, stress, or sticking.
Interpretation, assumptions, and limitations
FAQ
Can I use this as a final production setting?
No. Confirm with validated process data and the applicable machine and material documentation.
Why can the real result differ?
Geometry, melt behavior, pressure loss, material lot, temperature, cooling layout, and operating practice can materially affect results.