Electronic heating and automation

The principal methods of applying r.f. induction and dielectric heating are recalled, with particular reference to the employment of the electronic heater in conjunction with special purpose mechanical handling equipment. Work coil, electrode and associated handling equipment design are discussed. Aspects of the design of suitable electronic generators are outlined. Some of the commercial applications of electronic heating in the electronic valve, metalworking, woodworking, plastics and food industries are described. Applications considered include the outgassing and getter firing of electronic valves; petrol tank soldering; the hardening of starter ring gears, ball race tracks, rocker pads, cam followers, tappet screw heads and crankshafts; the manufacture of moulded wood products from wood waste; the welding of plastics sachets; the dielectric embossing of upholstery; and the removal of moisture from foodstuffs.