| 摘要 |
An electrostatic powder painting apparatus has a cyclone structure for directing powder paint toward a surface which is to be painted. The cyclone structure includes a feed cylinder having an open outlet through which the powder paint is delivered toward the surface to be painted, this feed cylinder having an outlet which is spaced from the outlet and which is adapted to receive air and powder paint suspended therein. The air is given a whirling motion within the feed cylinder so that the powder paint suspended in the air is centrifugally advanced along the inner surface of the feed cylinder from the inlet toward the outlet thereof, a conduit communicating with the inlet to supply thereto air with powder paint suspended therein. An exhaust cylinder, whose diameter is smaller than the feed cylinder, communicates coaxially with the feed cylinder to discharge air from the interior thereof. An air supply communicates with the conduit while between the air supply and the inlet of the feed cylinder there is a powder paint supply from which powder paint is delivered to the conduit to be conveyed with the air flowing therethrough to the inlet of the feed cylinder. The part of the above conduit extending from the powder paint supply to the inlet of the feed cylinder and the feed cylinder itself provide for the air and powder a path of flow extending along the interior of the conduit from the powder paint supply through the inlet into the feed cylinder and along the feed cylinder through and somewhat beyond the outlet thereof. Situated along this path of flow is a corona discharge electrode structure for electrostatically charging the powder paint with unipolar ions so as to drive the charged powder paint electrostatically toward the surface which is to be painted. |
