Abstract: A compact, well defined and easily used spray pattern is formed with substantial containment of the plural component materials and reduced contamination of the work environment. Connections for the plural component materials are supported and carried on a workman's body, and the plurality of components of the plural component material flow to, and are combined at the connections and are carried through a single flexible conduit to a lightweight spray gun easily manipulated.

Abstract: Method and apparatus provide effective application of plural component material from a plurality of air contained small streams, with stabilized stream formation, division and application and with a substantial reduction of VOC emissions in plural component applications, such as gel coat and wet-out applications in the manufacture of reinforced fiberglass articles. In the method, a flow of compressed air is delivered to an applicator and flows of the plural component materials are mixed and formed into a plurality of small, spaced streams extending from the applicator. The flow of compressed air is divided into a plurality of air flows that are directed about the plurality of small, spaced streams of plural component materials and generally adjacent and parallel to the streams. In apparatus for this method, a source of compressed air is provided and an applicator is adapted for connection to the source of compressed air and one or more sources of the plural component materials.

Abstract: An air-assisted, airless atomization, plural component spraying system and method includes a first source of a first component, e.g., a resin; a second source of a second component, e.g., catalyst for the resin; spraying means to mix the resin and catalyst and direct the mixture to a substrate and a source of compressed air. The spraying means includes a nozzle assembly which comprises a liquid nozzle for forming liquid into a fan-like film with expanding edges extending from a liquid orifice, and a nozzle assembly for directing a flow of compressed air and catalyst at the fan-like film closely adjacent the liquid orifice. In an internal mix system, compressed air is directed to impinge upon the expanding edges of the fan-like stream of mixed resin and catalyst downstream of the impingement of a flow of compressed air on the fan-like stream to capture particles in small, uniform spray pattern.

Abstract: An external mix, air-assisted, airless atomization, plural component spraying system and method includes a first source of a first component, e.g., a resin; a second source of a second component, e.g., catalyst for the resin; spraying means to mix the resin and catalyst and direct the mixture to a substrate; a source of compressed air; and means for injecting the catalyst into the compressed air. The spraying means includes a nozzle assembly which comprises a liquid nozzle for forming the resin into a fan-like film with expanding edges extending from a liquid orifice, and a nozzle assembly for directing a flow of compressed air and catalyst at the fan-like film colsely adjacent the liquid orifice. In a preferred embodiment, compressed air is directed to impinge upon the expanding edges of the fan-like resin stream downstream of the impingement of the flow of compressed air and catalyst particles to capture from catalyst particles in small, uniform spray pattern.

Abstract: An internal mix, air-assisted, airless atomization, plural component spraying system includes a source of resin; a source of catalyst for the resin; a spray gun to mix the resin and catalyst and direct the mixture as a spray to a substrate; and a source of compressed air to assist in atomization of the mixed resin and catalyst. The spray gun includes a mixing apparatus and an atomizer including a liquid nozzle for forming the mixed resin and catalyst into a fan-like film with expanding edges extending from a liquid orifice, and an air nozzle for forcing a flow of compressed air to converge at an elongated air orifice and expand in a fan-like flow.