Pinching

Pinching is the expression for the breaking of the stream in the channel and thus also the secondary inductor current due to too high an output, in relation to the static pressure of the melt from the vessel above the inductor. Pinching can also occur at static pressures adequate for normal operation due to the accumulation of deposits and the associated restriction of the channel. In order to avoid damage to the inductor, the output must be reduced when pinching occurs.