Rotary atomizer for particulate paints
AssigneeDürr Systems AG
InventorsKurt Vetter, Rolf Schneider, Andreas Fischer, Robert F. Heldt
Life of this patent
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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.
Claims23
A rotary atomizer bell cup having a generally conical overflow surface between a radially inward central axial opening and a radially outward atomizing edge, the generally conical overflow surface having a generally constant flow angle relative to the atomizing edge.
A rotary atomizer bell cup comprising:
- a bell cup body including a generally conical overflow surface between a radially inward central axial opening and a radially outward atomizing edge;
- a deflector having a deflection surface of generally rotational symmetry disposed in front of said central opening;
- a rear cover secured to a rear surface of the bell cup body, a generally annular cavity formed between the rear cover and overflow surface.
A paint spray zone for applying a particulate paint,having particulates comprising:
- a plurality of first paint sprayers each having a rotary atomizer, the first paint sprayers atomizing a first coat of the particulate paint to a surface;
- and
- a plurality of second paint sprayers each having a rotary atomizer, the second paint sprayers atomizing a second coat of the particulate paint to said surface over said first coat.
A method for the rotary atomization of a particulate paint including the steps of:
- a) atomizing liquid paint having particulates into paint droplets having a paint droplet size deviation less than 50 microns;
- and
- b) adjusting paint spray parameters to ensure proper color matching.
Dependencies are inferred from the claim text.