| 摘要 |
A two component external mix spray gun (10) having a pneumatically operated value (27) for controlling the injection of a catalyst into pattern shaping air passages in the gun. The catalyst is contacted with the atomized fluid externally to the spray gun (10). A trigger sequentially operates air (20) and fluid (35) valves to provide atomization air pattern shaping air prior to opening the fluid value (35). The pneumatic catalyst valve (27) is responsive to an increase in the air pressure downstream from the air valve (20) to inject the catalyst into the pattern shaping air. The invention may be incorporated in either a hand held spray gun with a manual trigger, or an automatic spray gun with a controller. <IMAGE> |
