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US 12,502,681 B2Granted
Rotary atomizing head-type sprayer and electrostatic painting apparatus
AssigneeABB Schweiz AG
InventorMasaru Terada
Life of this patent
Estimating the term…
Abstract
Inner cylinder surface of shaping air ring may be formed to a uniform inner diameter dimension. After first shaping air discharge unit has been formed as an annular gap, the gap dimension may be set to 0.1 to 1.0 mm. Front end of shaping air ring is positioned 0.1 to 10.0 mm from discharge edge of rotary atomizing head. The radial width dimension of front end is set to 2 mm or less. Front outer cylinder surface of shaping air ring has a taper angle β of 25° or less in relation to the axis line O-O, expanding toward the rear side.
Claims5
A rotary atomizing head-type sprayer that is equipped with an air motor powered by compressed air,
- a hollow rotary body that is rotatably supported along an axis line of said air motor in a front-back direction and of which a front end protrudes from said air motor,
- a feed tube extending through said rotary body to said front end of said rotary body,
- a rotary atomizing head that is mounted on said front end of said rotary body and that has an outer circumferential surface that expands into a cup shape and an inner circumferential surface that diffuses a coating material supplied from said feed tube, and a discharge edge located at a front end to discharge the coating material,
- a cylindrical shaping air ring provided on an outer circumferential side of said rotary atomizing head,
- and a first shaping air jetting unit mounted on the outer circumferential side of said rotary atomizing head to jet a first shaping air to the coating material discharged from said discharge edge,
- wherein an inner cylinder surface of said shaping air ring is formed of a uniform inner diameter at least on a front side portion facing said outer circumferential surface of said rotary atomizing head,
- said first shaping air jetting unit is formed as a ring gap between said outer circumferential surface of said rotary atomizing head and said inner cylinder surface of said shaping air ring,
- a gap dimension between said outer circumferential surface of said rotary atomizing head and said inner cylinder surface of said shaping air ring is set to 0.1 to 1.0 mm,
- a front end of said shaping air ring is positioned 0.1 to 10.0 mm from said discharge edge of said rotary atomizing head on a rear side,
- a radial width dimension of said front end of said shaping air ring is set to be less than 2 mm,
- and an outer cylinder surface of said shaping air ring has a taper angle of 25° or less in relation to said axis line, expanding from said front end to a rear side of said shaping air ring.
8 more elements
Dependencies are inferred from the claim text.