Method for electrostatically coating objects and application device

Patent metadata

Field	Value
Publication number	US-9795986-B2
Application number	US-201113880863-A
Country	US
Kind code	B2
Filing date	Oct 28, 2011
Priority date	Nov 12, 2010
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

An electrical field is generated between an application device and an object to be coated. At least one corona electrode associated with the application device is connected to ground, and at least one counter electrode associated with the object is connected at least at intervals to a positive potential. A system for electrostatically coating objects having an application device coating material, and an electrical field device having a high-voltage source which generates an electrical field between the application device and an object to be coated. The field device comprises at least one corona electrode associated with the application device, and at least one counter electrode associated with the object, wherein, during the operation of the device, the at least one corona electrode is connected to ground, and the at least one counter electrode is connected at least at intervals to a positive potential.

First claim

The invention claimed is:

1. A method for electrostatically coating objects within a painting booth, comprising the steps of:
generating an electrical field between an application device and an object to be coated, wherein
for generating the electrical field at least one corona electrode associated with the application device is connected to earth potential, and at least one counter electrode associated with the object is connected to a positive potential and further wherein further components of the painting booth or further components within painting booth which may be reached by paint particles are connected to earth potential.

2. The method according to claim 1 , wherein the object is used as a counter electrode.

3. The method according to claim 1 , wherein an auxiliary counter electrode which is arranged on a side of the object facing away from the application device is used a counter electrode.

4. The method according to claim 3 , wherein the object and the auxiliary counter electrode form a counter electrode system and are connected independently of one another to a high-voltage potential of at least 600V, a size of the high voltage potential being adjustable.

5. The method according to claim 1 , wherein a booth wall of a painting booth in which the application device, the counter electrode and the object are arranged, is connected to earth potential.

6. The method according to claim 5 , wherein a cylindrical booth wall is used.

7. A method for electrostatically coating objects within a painting booth, comprising the steps of:
generating an electrical field between an application device and an object to be coated, wherein
for generating the electrical field at least one corona electrode associated with the application device is connected to earth potential, and further wherein further components of the painting booth or further components within painting booth which may be reached by paint particles are connected to earth potential,
wherein an auxiliary counter electrode which is arranged on a side of the object facing away from the application device is used a counter electrode.

8. The method according to claim 7 , wherein the object and the auxiliary counter electrode form a counter electrode system and are connected independently of one another to a high-voltage potential of at least 600V, a size of the high voltage potential being adjustable.

Assignees

• Swoboda Werner
• Reichler Jan
• Eisenmann Se

Inventors

• Swoboda Werner
• Reichler Jan

Classifications

• B05B5/087 Primary

  Arrangements of electrodes, e.g. of charging, shielding, collecting electrodes (B05B5/12, B05B5/14 take precedence; arrangements of electrodes on the discharge apparatus B05B5/0533) · CPC title

• B05D1/007 Primary

  using an electrostatic field (B05D1/02 - B05D1/16 take precedence) · CPC title

• B05B5/10

  Arrangements for supplying power, e.g. charging power (in discharge apparatus B05B5/053) · CPC title

• B05B15/1244

  Operations & Transport · mapped topic

• B05B5/00

  Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means · CPC title