Heating apparatus for losses dielectric of preforms of articles of thermoplastic material

摘要

The invention relates to an apparatus intended to control the heating losses dielectric of several preforms made of thermoplastic material intended to be cast by blowing. / p & & p & the apparatus includes a radiofrequency incorporated 60 associated with a sensor 80 is sensitive to a limit of the current of discharge, and which, by means of a programmable controller 90, acts on the list 60 so that the latter brings selectively and disconnection of the pairs of electrodes 40, 42, 44, 48, as a function of the presence of preforms in the heating station and the priming of arcs can occur between the electrodes. p / p field of application: molding articles by heating and blowing.