A lifeline for varnished wires
Coils made of varnished copper windings are essential to a vast range of electrical components and appliances, automobile starters and generators being only two examples.
What’s more, making coils can be a tricky job, as the wires must be perfectly insulated from their housing or magnetic blocks. The costs of less-than-perfect insulation are large. Should current leakage be detected at the final control stage, the entire finished product has to be rejected. Recently, a French manufacturer decided to install automated, fully insulated control procedures before final assembly. However, to achieve this it is first necessary to ensure that all the varnish on the terminals is burned and easy to brush out—something that only induction heating can guarantee. Today, this customer uses EFD Induction equipment to heat wire ends. This burns the varnish, which is then brushed out. The EFD Induction solution is integrated into a fully automatic line that includes a 100% insulated control system. Scrap and re-working costs have gone down considerably, as faulty parts are now detected well before final assembly.