| 摘要 |
Spray gun (10) includes a unitary valve (22) for controlling the flow of polyester resin and catalyst through the gun and discharging the polyester resin and catalyst in converging streams from nozzles (24) and (26) so that the two liquids thoroughly mix as they flow together through the air. Valve (22) includes a rearward, catalyst mixing section (82) composed of an inlet sleeve (90) and an outlet sleeve (91), and a forward resin flow control section (84) composed of an elongate inlet sleeve (144) and an end sleeve (150). Inlet ports are formed in sleeves (90) and (144) and outlet ports are formed in sleeves (91) and (150) to permit the flow of catalyst and resin when an elongated needle (80), extending longitudinally through the center of the sleeves, is disposed in rearward, activated position and to prevent the flow of catalyst and resin when the needle (80) is disposed in forward, deactivated position.
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