Importance

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Abstract

An air atomizing electrostatic coating gun which atomizers a liquid paint by using air flows and thereafter applying atomized liquid paint to an object to be coated by using an electrostatic force. In this coating gun, all of a rod valve, a driving piston, an air cylinder and valve support members of a needle valve device are made of insulating materials having good insulating properties, and an electrode for charging paint particles is attached to the valve. A nozzle-needle valve assembly which is integrally constructed by attaching a paint nozzle to a cylindrical extension of the air cylinder which is formed at a front end portion thereof, is inserted and fitted into a generally cylindrical cavity in a front end portion of the gun body from the front side thereof. An integral molded body incorporating a direct current high-voltage power source is formed by molding a synthetic resin having good insulating properties to embed therein a boosting high-voltage transformer, a rectifier type direct current high-voltage generator and a spiral-wound flat high-resistance element, and this integral molded body is detachably attached and fixed inside of the gun body by inserting it into a cavity formed in a rear end portion of the gun body from the rear side thereof.

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First Claim