B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
B05D 1/04 (2006.01) B29C 37/00 (2006.01) B29C 70/08 (2006.01)
Patent
CA 2071341
C-4339 METHOD OF ELECTROSTATICALLY COATING NONCONDUCTIVE PANELS ABSTRACT OF THE DISCLOSURE Plastic automotive panels are painted electrostatically by coating the rear of the panel with conductive material to serve as the grounded terminus of an electrostatic paint deposition field and paint is sprayed onto the front of the panel by conventional electrostatic spray guns. The coating is applied to the panels by spraying a conductive salt or a conductive primer to the rear surface and allowed to dry, or the panel is formed with the conductive coating molded in situ. In the latter case, conductive material is sprayed onto a mold surface or a metal foil or metallized plastic sheet is inserted into the mold before the part is formed to result in a panel with a conductive rear surface. Also in-mold coating can be used to apply a conductive coating during the formation of a plastic panel.
Elmoursi Alaa A.
Garner David P.
General Motors Corporation
Gowling Lafleur Henderson Llp
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