Note: Inserting a piston stop & o-ring (oil pump)

Objective:

To insert a piston stop with o-ring into an oil pump assembly 

End Product:

Oil pump

Equipment:

Ambrell 1 kW induction heating system, equipped with a remote workhead containing one 0.66 μF capacitor.
An induction heating coil designed and developed specifically for this application. 

Materials:

Rubber o-ring, steel piston stop and plastic pump body 

Temperature:

650 °F (343 °C)

Frequency:

323 kHz

Testing:

A two turn helical coil is used to heat the piston stop to 650 °F (343 °C) for 8-10 seconds prior to insertion into the black plastic pump body. The piston stop with the o-ring is then inserted into the pump body. Air is supplied to cool the steel insert quickly so that the o-ring does not melt. The piston stop is inserted into the pump body and is held in place during cooling and creates the bond.

Benefits:

  • Increased production speed

  • Simpler tooling for customer

  • Hands-free heating that involves no operator skill for manufacturing

  • Even distribution of heating 

Inserting a piston stop & o-ring (oil pump)

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