Patent ID: 8490572

Claim:
A rotary electrostatic coating device, comprising: a rotary head for discharging paint radially outward, said rotary head having an axis of rotation; a plurality of shaping air holes configured and arranged at intervals on a first circle which is positioned further back than an outer peripheral part of said rotary head and which has the axis of rotation of said rotary head at its center, a helically swirling shaping airflow flowing out of said shaping air holes, said shaping air holes directing paint discharged radially outward from an outer peripheral edge of the rotary head toward a piece to be coated so as to produce a coating pattern, a plurality of control air holes configured and arranged at intervals on a second circle having a smaller diameter than said first circle and is positioned to a rear of the outer peripheral part of said rotary head and concentric with the first circle, and first control valve configured to control a flow rate of pattern control air which flows out from said control air holes, a second control valve configured to control a flow rate of shaping air which flows out from the shaping air holes; and the shaping air holes and the control air holes are oriented in substantially a same torsion angle direction, opposite to a direction of rotation of the rotary head; an axis of the shaping airflow passes through a position within proximity to and radially outward from the outer peripheral edge of the rotary head; and an axis of the control airflow intersects the axis of the shaping airflow at a position within proximity to and radially outward from the outer peripheral edge of the rotary head, wherein said shaping airflow and said control airflow merge radially outward from the outer peripheral edge of the rotary head, and wherein said coating pattern is changed linearly by combining control of the said first and second control valves.