| 摘要 |
<p>Thin sheet metal articles, e.g. laminations for magnetic cores are given an insulating coating by electrophoresis. Parallel plate electrodes running the length of the tank are immersed in the coating solution. They are perforated for circulation, and top and sides are surrounded by insulating guide elements. These rise above the fluid at the entry to the tank, and below the surface are corrugated, and pierced with holes in the troughs of the corrugations. The articles to be coated are carried by a monorail over the tank, which dips them into the solution. The hanger is insulated, and below this brushes make electrical contact with an anode current bar when the articles are immersed. Parallel plate electrodes produce a uniform electric field giving a good coating. The guide profile directs the articles into position before immersion. The form below the surface of the solution prevents contact with the electrode, but does not interfere with the coating. The radius of curvature of the corrugations is between 20 and 30 min., and the area of the perforations between 25 and 35% of the total superficial area of the guides.</p> |
