| 摘要 |
<p>The invention provides a spray gun comprising a main body 2, a spray head 6, an inlet 12 for a liquid to be sprayed, and an inlet 10 for a supply of a compressed air;
the spray head comprising an air cap 40, a hollow nozzle member 36 having a nozzle tip 46 for dispensing the liquid, and means 58 for securing the air cap and nozzle member to the main body 2;
the air cap 40 having a central aperture 52 through which atomising air is directed to atomize liquid dispensed through the nozzle tip to form a spray, and one or more lateral apertures 56 through which fan air is directed for shaping the spray to a desired pattern;
the hollow nozzle member 36 having a radially extending weir 48 which together with a surface 51 of the main body defines an air distribution chamber 53 for receiving and distributing compressed air from the supply inlet 10;
wherein an annular sealing member 38 having an annular wall is sealingly disposed between the radially extending weir 48 and the said surface 51 of the main body 2 so as to divide the air distribution chamber 53 whereby air passing into the chamber 53 through an opening 94 to one side of the annular wall is directed to the central aperture 52 of the air cap 40 and air passing into the chamber 53 through an opening 92 to the other side of the annular wall is directed to the lateral apertures 56 of the air cap 40.</p> |
