Method for the high-frequency heating of dielectric workpieces

Details Method for the high-frequency heating of dielectric workpieces Method for the high-frequency heating of dielectric workpieces

1991-10-29

1994-01-11

Reynolds, Bruce A.

Electric heating

Capacitive dielectric heating

With power supply system

219 612, 219110, 219765, H05B 660, H05B 650

Patent

active

052783820

ABSTRACT:
A method for the heating and joining together, preferably for welding, of workpieces by use of a generator. Where, during a heating interval the generator supplies high-frequency energy to at least two electrodes disposed on the workpiece and where the energy supply is controlled by a predetermined time-related curve, with respect to a target value. Accordingly, the energy supply is controlled with reference to the target value by monitoring a first parameter, e.g., high-frequency voltage, high-frequency current or generator anode current. Also, during the heating interval at least one further parameter is monitored, and in the event of an inadmissible divergence in the control system of the first parameter, a subsequent control of the energy supply is carried out.

REFERENCES:
patent: 2540613 (1951-02-01), Foley et al.
patent: 3118999 (1964-01-01), Dreyer
patent: 4221950 (1980-09-01), Lamberts et al.
patent: 4254323 (1981-03-01), Takamatsu et al.
patent: 4307276 (1981-12-01), Kurata et al.
patent: 4420670 (1983-12-01), Croswell et al.
patent: 4531038 (1985-07-01), Lillibridge et al.
patent: 4621176 (1986-11-01), Kliesch et al.
patent: 4740665 (1988-04-01), Sanmiya et al.

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