The
heating of metal by induction has been in industrial use since
the beginning of the 20th century, but it is only in the last
few years that it has become possible to produce high-efficiency,
low to medium power apparatus, due entirely to semiconductors.
CEIA's Induction Melting Machines have achieved
widespread recognition in the field of precious metal casting.
Careful study has led to the choice of appropriate
operating frequencies that have almost eliminated the problems
of weight loss of the precious metal and surface oxidisation
on melting.
Unlike in the case of high frequency furnaces,
high-density surface currents ('skin effect'), which can violently
oxidise the metal being treated, are not created. |
