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US 7,017,835 B2Granted
Rotary atomizer for particulate paints
AssigneeDürr Systems AG
InventorsKurt Vetter, Rolf Schneider, Andreas Fischer, Robert F. Heldt
Life of this patent
Estimating the term…
Abstract
A rotary atomizer applies particulate paints with good color matching by reducing paint droplet size deviation and then optimizing the other paint spraying parameters. Paint droplet size parameters are reduced by using a bell cup having reduced flow deviations, including an overflow surface having a generally constant angle between a deflector and an atomizing edge.
Claims10
A rotary bell cup capable of atomizing particulate material for use in a paint application zone, comprising:
- a substantially continuous conical overflow surface providing laminar flow for particulate material delivered through a central axial opening and an annular spray edge surrounding said overflow surface;
- a deflector having a deflection surface of generally rotational symmetry disposed in front of said central axial opening and overlapping said conical overflow surface in a spaced relationship;
- and
- wherein said deflector includes a diameter substantially less than a diameter of said overflow surface thereby atomizing particulate paint droplets having a size deviation of less than about 50 microns enabling said rotary bell cup to apply a first coat and a second coat of particulate paint in the paint application zone.
1 more element
A rotary bell cup for atomizing paint in a paint application zone, comprising:
- a generally conical overflow surface having a generally constant flow angle defining a radially inward central axial opening and a radially outward atomizing rim;
- a central flat portion disposed between said conical overflow surface and said radially inward central axial opening;
- a deflector having a deflection surface of generally rotational symmetry disposed in front of said central opening having plurality of passageways disposed therethrough opposite said central opening, wherein said rotary bell cup is adapted to apply either a first or a second layer of paint in said paint application zone.
Dependencies are inferred from the claim text.