Injection molding · Mold cooling
Mold Heat Removal Calculator
Estimate average heat removal from the complete cooled shot. Use controlled coolant, machine and mold records; this calculator does not approve a process or equipment selection.
Formula and method
Q̇ = mass flow × enthalpy reduction. For the simplified mode, enter cp × ΔT as the energy term; it omits crystallization and variable cp.
Inputs and units
Use stated SI units and verified fluid properties.
Worked example
120 g every 30 s with 450 kJ/kg removes 1.8 kW.
What the result supports
Use this result to prepare the next circuit or equipment check.
Sanity check
Confirm the same circuit, fluid state and stable time window.
Important limitation
Do not use the estimate as a process release or equipment selection.
Next calculation
Continue through the documented cooling workflow.
FAQ
What must be measured after using this calculator?
Verify flow, temperature, property basis and circuit condition in the mold.
Inputs and validation
Obtain circuit diameter or validated hydraulic diameter, measured flow, supply/return temperature and coolant condition from the actual mold circuit. Water properties used by default approximate clean water near 20°C; for glycol mixtures or other temperatures, enter supplier-verified density, viscosity and specific heat rather than extrapolating.
Interpretation and limitations
Record pressure loss, manifold position, hoses, scale, fittings and sensor calibration. A high Reynolds number has diminishing cooling benefit and can increase pump energy. Confirm any result with stable-state flow and temperature measurements.
Related workflow
Cooling Time → Mold Heat Removal → Required Flow → Reynolds → Water Temperature Rise → Chiller Size.
Sources
SmartFlow cooling resources · Conair chiller sizing · Dow glycol guide.