Method and arrangement for dielectric heating of plastic pipes (original) (raw)

2014

Abstract

Disclosed is a method and an arrangement for dielectric heating of plastic pipes or other tubular structures of any cross section of dielectric material described. At least one internal electrode is provided which is located in the interior of the plastic tube and at least two external electrodes, which surround the plastic pipe. The inner electrode is extended in the axial direction of the tube so that at least a partial overlap exists with at least two external electrodes. At least two external electrodes, a high frequency AC voltage is applied. The system external electrode-pipe internal electrode outer electrode forms a series arrangement of two capacitors whose dielectric is formed in each case by the plastic of the pipe wall. There is a dielectric heating in the region of overlap between inner and outer electrodes. This can eg. For example, be used to heat the tube for a bending operation.

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