Mazda Motor Corporation

Nippon Paint Compnay, Ltd.

Hirohiko Koge

Ikuo Tochizawa

Kensuke Akutsu

Takanori Hara

Akinori Iwata

Kouichi Kuwano

Koji Ueki

Yuji Tanaka

Makoto Moriyama

Masatoshi Fujii

In a method of corona discharge processing of resin formings surface, excellent corona discharge processing is possible, even if there is a distance between the resin formings and the discharge electrode, by generating a high voltage pulse having a pulse width of 1 .mu.s or more, an average electric field strength of 4 to 20 kv/cm denoted by applied voltage (wave height) versus interelectrode distance, and a pulse frequency of 10 pps or more. This processing is performed by the apparatus which comprises arranging a transfer conveyor to transfer the resin formings, a counter-electrode placed in a down side of the transfer conveyor, a dielectric to cover a surface of the counter-electrode, and a number of discharge electrodes which are arranged in a definite distance above the resin formings along the transfer route.

Method and apparatus for corona discharge processing

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Hiroshima, Japan

Hirohiko Koge