Sealing a Nylon Shell for a fuel vapor Assembly

Objective

To heat an electrically conductive ring gasket to seal the nylon halves of an activated-carbon fuel vapor module while reducing process time and cost. 

End Product

Fuel Vapor Assembly

Equipment

• Ambrell EKOHEAT 20kW power supply

• Remote heat station with 0.66µF capacitance

• Specially-designed four-position induction coil

• Customer-designed parts and test fixture 

Materials

Nylon housing molds, conductive seal 

Temperature

outer ~220°F , inner seal ~500°F

Frequency

165 kHz

Testing

Filter modules are assembled on the fixture with ring gasket. Pressure is applied to the modules, modules are rotated and induction heating is started. After 10-12 seconds, heating is halted and the modules are removed from the fixture.

Benefits

Seal integrity is confirmed.

• Process times are reduced by more than 50%

• seal material costs are reduced by ~90%

• on-coil voltages are reduced by ~90%

• arcing and related down-times are eliminated 

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