US 5,178,326 A · Industrial spraying system

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. In addition, a valve can be provided in the system and operated to place it in a first position in which the flow of solvent is blocked and the flows of the first and second components of the plural component material are permitted to flow through the connections and check valves to be combined in the valve and directed in a combined flow from the valve output connection, and in a second position in which the flows of the plural components are blocked and a flow of solvent is permitted through the connections and check valves and the valve and is directed by the valve through the valve output connection, the single flexible conduit and the spray gun. In an air-assisted airless atomization internal mix system, compressed air is directed to impinge upon the expanding edges of a 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.

Claims14

Dependent claims

A spraying system for forming a coating on an article, comprising:

a source of coating material;
spraying means for directing the coating material at the article;
liquid delivery means for providing a flow of said coating material from said source to said spraying means;
a source of compressed air;
and
air delivery means for providing a flow of compressed air from said compressed air source to said spraying means,
said spraying means including an airless liquid nozzle for forming the coating material into a fan-like film with edges expanding from a liquid orifice, and a nozzle assembly for directing a first flow of compressed air to impinge on the fan-like film closely adjacent to the airless liquid nozzle and assist in the formation of a particle spray, and for directing a second flow of compressed air to substantially confine the particle spray downstream of the impingement of the first flow of compressed air,
said first flow from said nozzle assembly comprising two flows of compressed air directed from opposite sides of the fan-like film, and said second flow of compressed air comprising two parallel flows of compressed air directed at the expanding edges of the fan-like film downstream of the impingement of the first flows to assist in the formation of and substantially confine the particle spray, said first and second flows of compressed air interacting with the fan-like film of coating material to assist atomization and capture of the spray particles.

5 more elements

In an industrial apparatus for forming a coating on an article, having a spraying means including an airless liquid nozzle for forming coating material into a fan-like liquid film with edges extending from the liquid nozzle and a plurality of air orifices, the improvement wherein said spraying means comprises:

a nozzle assembly for directing a first flow of compressed air to impinge on the fan-like liquid film closely adjacent to the airless liquid nozzle and assist in the formation of a particle spray, and for directing a second flow of compressed air forwardly at the article substantially in the plane of the fan-like liquid film to substantially confine the particle spray downstream of the impingement of the first flow of compressed air,
said first flow from said nozzle assembly comprising two flows of compressed air having greater width than depth directed from opposite sides of the fan-like film, and said second flow of compressed air comprising two parallel flows of compressed air directed at the expanding edges of the fan-like film downstream of the impingement of the first flows, said first and second flows of air interacting with the fan-like film to assist atomization and capture the particle spray.

Dependencies are inferred from the claim text.

Industrial spraying system

Life of this patent

Industrial spraying system

Life of this patent

Abstract

Claims14