Note: Heating a steel mold for rubber seal vulcanization
Objective:
To heat a steel mold evenly to 392 °F (200 °C) to be used on a press for rubber seal vulcanization
End Product:
Rubber seal
Equipment:
Ambrell 30 kW induction heating system, equipped with a remote workhead containing eight 0.3 μF capacitors for a total of 0.6 μF
An induction heating coil designed and developed specifically for this application
Materials:
Steel mold 13.4 in (340 mm) diameter, 2.16 in (55 mm) width, approximately 77.2 lbs (35 kg)
Temperature:
392 °F (200 °C)
Frequency:
78 kHz
Testing:
Two thirteen-turn pancake coils are used to heat both sides of the mold simultaneously for 170 seconds to reach an external temperature of 392 °F (200 °C). The power is continually decreased over the next 390 seconds to reach a uniform temperature of 392 °F (200 °C) ĂÄ 41 °F (5 °C) throughout the mold.
Benefits:
- Repeatable and consistent heat
- Quicker process time, increased production
- Even distribution of heating

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