Note: Bonding a plastic handle to a surgical knife
Objective:
Bonding handle of a stainless steel surgical knife into a plastic handle
End Product:
scalpel
Equipment:
Ambrell 4.2 kW induction heating system, equipped with a remote workhead containing one 0.66μF capacitor.
An induction heating coil designed and developed specifically for this application.
Materials:
Plastic tool handle, 0.125 in (3.18mm) diameter steel knife
Temperature:
450 °F (232 °C)
Frequency:
390 kHz
Testing:
A four turn split helical coil is used for this application. Power is applied to the steel knife for 2.0 seconds to reach 450 °F (232 °C). The steel knife is then inserted into the plastic handle to create a solid bond.
Benefits:
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Fast, accurate, repeatable heatAble to heat very small areas within precise production tolerances
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Hands-free heating that involves no operator skill for manufacturing
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Even distribution of heating

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