| 摘要 |
<p>An electrostatic spray gun apparatus includes a spray gun housing (4) and a nozzle attached to a spray end of the housing, and a powder path (60) that extends in a substantially straight line along an axis of the housing from the power inlet to the powder outlet. The powder path (60) is in the form of an enclosed smooth powder passage that is substantially continuous and uninterrupted from the powder inlet to the powder outlet to eliminate substantially all recesses or gaps that could capture or trap powder. The powder passage is formed by a plurality of tubular segments that are aligned along the housing axis and abut end to end, that when assembled in the housing axially compress the segments together to substantially eliminate dead spots or recesses to form the continuous smooth powder path. The gun also includes a tube mount arrangement wherein the tube mount is rigidly held together with the gun housing in axial compression by a tie bar. The gun may further include a nozzle that provides a directional spray pattern to one side of the nozzle thereby allowing the gun to easily spray non-vertical surfaces, said nozzle comprising a generally hollow nozzle body having a powder passageway therein; said passageway having a central axis (XX), at least one slot (908 a, b, c) in said nozzle body that opens to said passageway; said at least one slot being substantially on one side of a reference plane (YY), said central axis (XX) being coplanar with said reference plane (YY), whereby powder enters said passageway and is sprayed out said at least one slot to form a spray pattern that is substantially directed away from said reference plane.</p> |
