A fluid tip for use with a spray gun. The fluid tip comprises an air cap and a paint nozzle. The air cap comprises an inner surface 206 and the paint nozzle comprises an outer surface 208. The inner and outer surfaces define sides of an air channel 203. The inner and outer surfaces are defined by contours, each contour terminating to form an air channel outlet 207 for discharging an air jet proximal a paint nozzle outlet of the paint nozzle. The contours are configured to provide a velocity profile 400 across the air channel outlet 207 of an air flow 401 through the air channel 203 in which velocities of air radially closer to the paint nozzle outlet are substantially higher than velocities radially further from the paint nozzle outlet.

The invention relates to a low energy spray gun for spraying thin film materials with a thickness of <40 microns such as high performance, thin viscosity nano-paints, lacquers, varnishes and the like. The spray gun comprises a main body (12) having a fluid inlet (14a) connected to an external fluid source (not shown) and a fluid outlet nozzle (16a). Gas outlets (16b-d) on the main body carry entrained fluid droplets emitted from the fluid outlet (14a) the shape of which are controlled by horn outlets (24) positioned beyond the fluid outlet (14a) and gas outlets (16b-d). First and second gas conduits (20, 22) are connected between a common gas inlet (18) and gas outlets (16b-d) and horn outlets (24) respectively. The cross-sectional area of a portion of the first gas conduit (20) is reduced relative to that of the second gas conduit (22) thus creating a pressure drop and a discernible improvement in fluid atomisation.

An atomizing spray device includes a housing having plural inlets and one or more outlets fluidly coupled with each other by an interior chamber. The inlets include a first inlet shaped to receive a first fluid and a second inlet shaped to receive a slurry of ceramic particles and a second fluid. The interior chamber in the housing is shaped to mix the first fluid received via the first inlet with the slurry received via the second inlet inside the housing to form a mixture in a location between the inlets and the one or more outlets. The interior chamber in the housing also is shaped to direct the mixture formed inside the housing as droplets outside of the housing via the one or more outlets such that, based on a discharged amount of the first fluid in the droplets, the first fluid promotes evaporation of the second fluid as the droplets traverse from the housing toward a surface of a component.

Systems and methods that provide or restore a coating to a component are provided. The systems and methods utilized an atomizing spray device. A slurry that comprises a fluid and ceramic particles, and a gas are supplied to the atomizing spray device. The slurry and gas are discharged from the spray device to form two-phase droplets. The fluid within the droplets evaporates to prevent the fluid from becoming part of the coating as the droplets traverse through the air and prior to impacting the surface of the component.

A nozzle arrangement for a spray gun, in particular a paint spray gun, has at least one paint nozzle and an air cap. The paint nozzle has at least one outlet opening for the material to be sprayed and the air cap has at least one central opening which is bounded by at least one wall. The at least one wall forms a gap with at least one part of the paint nozzle, and a forward part of the paint nozzle has at least an inner face, an outer face and an end face. The end face of the paint nozzle encloses, at least in certain regions, an angle of greater than 90 or an angle of less than 90 with an outer face or an inner face of the paint nozzle. In the nozzle arrangements, the back-pressure counter to the outflow of the material to be sprayed is lower than in prior art nozzles. A spray gun, in particular a paint spray gun, having such a nozzle arrangement is also disclosed.

Applicant discloses a novel method of spray applying multiple courses of a rapid cure, two part polymer sealant to an aircraft surface. The method sometimes uses a two part polymer mix for use in the aircraft industry that is applied with pneumatic mix and spray gun. The two part cartridge is used in the mix and spray gun so the mix is applied immediately upon mixing, but the two components are kept separated unless the gun is applying the mix. The multiple courses cure to form a clear sealant that allows for inspection of cracks and corrosion beneath the sealant. It cures quickly so that the coated part may be further processed, for example in the assembly line during aircraft build. Applicant further discloses multiple spray gun systems for applying such a two-part polymer mix to aircraft parts.

A paint spray gun comprises a spray gun body; an air cap; and a hollow needle capable of assuming at least an open position enabling the passage of paint therethrough and a closed position; at least one air distribution channel for atomizing air; and at least one air distribution channel for fan air. A fluid spray single two stage nozzle includes first and second internal surfaces at first and second predetermined angles, respectively, with respect to a rotational axis of symmetry of the nozzle, wherein the first angled surface is proximate a forward opening of the nozzle, the second angled surface is aft of the first angled surface, the first angle is in a range of substantially 0.05 to thirty degrees, and the second angle ranges from substantially 0.1 to sixty degrees greater than that of the first angle.

A spray gun and a method for use thereof comprises a spray gun body; an air cap; a fluid spray nozzle having a fluid tip; at least one air distribution channel for atomizing air; and at least one air distribution channel for fan air, wherein the fluid spray. The fluid spray nozzle and the air cap are configured to direct an atomization air flow at an angle of substantially 10 to 70 degrees relative to the liquid coating composition jet, into the pre-atomized coating composition jet and produce an atomization air pressure to fan air pressure ratio of substantially 8.0 to 1.5.

A spray gun and a method for use thereof comprises a spray gun body, an air cap, a fluid spray nozzle having a fluid tip, a hollow needle, at least one air distribution channel for atomizing air, and at least one air distribution channel for fan air, wherein the fluid spray nozzle and the air cap are configured to direct an atomization airflow at an angle of 10 to 75 degrees, preferably 15 to 60 degrees, and more preferably of 30 to 45 degrees (relative to the coating composition jet) into composition jet, and the fluid spray nozzle and the air cap are configured to provide an atomizing air pressure to fan air pressure ratio (AA/FA) of 0.1 to 10, preferably 0.5 to 1.0, more preferably of 0.6 to 0.9, and still more preferably of 0.66 to 0.88.

An air cap arrangement and a spray gun. The air cap arrangement comprises an air cap, an air cap ring and a retaining ring. The air cap ring comprises a groove configured to extend on the circumferential inner surface of the air cap ring. The air cap also comprises a groove configured to extend on the circumferential outer surface of the air cap, and the retaining ring is arranged in the groove of the air cap ring and the groove of the air cap to limit the axial movement of the air cap within the air cap ring.