Rubber Mold Engineering

⏱️Cure (Vulcanization) Time

Estimate the mold-open cure time from the material t90 (time to 90% cure), section thickness and actual mold temperature.

mm
°C
min
min/mm
added minutes per extra mm of thickness
Preheat for thick sections
min/mm
added minutes per mm of thickness beyond the threshold
mm
no preheat is added while thickness stays below this value
%

✓ Result

Adjusted t90
Preheat time
Recommended cure time
Total incl. loading allowance
Rule of thumb: every +10 °C roughly halves the cure time; the Arrhenius tool below quantifies this for multi-stage histories.

⚖️Equivalent cure time (Arrhenius)

Convert cure stages to an equivalent time at a reference temperature using the Arrhenius rate law, so a multi-stage thermal history can be summed and compared against the material t90.

K
typical rubber cure ≈ 8,000–16,000 K (≈ 70–130 kJ/mol)
Common polymers:
°C
min
Process stages (Temp, °C · Time, min)