Process Parameters
Polymer Material
Wall Thickness s
3.0 mm
Mold Temperature T_mold
50 °C
Ejection Temperature T_eject
80 °C
Fill Time t_fill
2.0 s
Pack Time t_pack
5.0 s
Mold Open/Close t_open
4.0 s
Projected Area A
100 cm²
Flow Length L
100 mm
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Cooling Time tc [s]
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Cycle Time [s]
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Cycle Rate [parts/h]
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Injection Pressure [MPa]
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Clamp Force [kN]
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Thermal Diffusivity α [mm²/s]
Mold Cross-Section (Cooling Channel Layout)
Center Temperature vs Time
Cycle Time Breakdown
Governing Equations
Cooling time (Rosato/Menges formula):
$$t_c = \frac{s^2}{\pi^2 \alpha} \ln\!\left[\frac{4}{\pi} \cdot \frac{T_{melt} - T_{mold}}{T_{eject} - T_{mold}}\right]$$α = k/(ρ·Cp): thermal diffusivity
Injection pressure (Hele-Shaw): $P_{inj} \approx \dfrac{12\eta L Q}{s^3 w}$
Clamp force: $F_{clamp} = P_{inj} \times A_{proj}$ [kN]
CAE Integration: Cooling time tc is used for cross-validation with Moldflow/Moldex3D thermal analysis. Clamp force is used for press machine selection. Injection pressure serves as a load boundary condition for mold deformation (FEM) analysis.