B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
B05B 7/04 (2006.01)
Patent
CA 2084830
A multiple component spray gun for spraying plural components is claimed useful in applications involving polyurethane foams, elastomeric coatings, paints, thermosetting resin formulations, and the like. The ejected components are atomized under high or low pressure via a novel multiple mixing action. The gun design allows for an exchange of the mixing chamber components without the need to dismantle the gun body. The concept of the spray gun involves a gun body and a nozzle, a rotatable ball passage valve including a ball with internal porting in a general Y-configuration with two opposing inlet passages and a cylindrical outlet bore with the ball positioned in a totally enclosed resilient resinous packing material. The preferred packing material if formed from polytetrafluoroethylene commonly referred to under the trademark Teflon. The A and B components are communicated across the passages of the Y-configuration prior to the novel multiple mixing action and material back flow is virtually eliminated. An air purge flow through the ball and nozzle is provided when spraying is completed. The ball valve is rotated by means of a double acting pneumatic cylinder and both the air cylinder and ball reciprocate and rotate through an appropriate linkage;
Martin Olin H.
Na
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