| 摘要 |
<p>In apparatus for electrostatic powder coating, comprising a spray chamber having in its upper part a conveyor movable in an endless path, in which part of the path of the conveyor forms a substantially-closed bight, the improvement consists in providing a powder-spray module having a substantially-vertical axis of rotation positioned within the bight, whereby articles to be coated suspended from the conveyor are located in the path of the powder spray. The spray module preferably comprises a veined impeller able to rotate about a vertical axis and having charged powder projected towards its centre from a stationary nozzle (15) so that vanes on the impeller impart centrifugal force to the powder particles. The impeller and nozzle assembly may be reciprocated vertically so that the sprayed powder traverses the length of the suspended and moving articles. <IMAGE></p> |
