Powder-spraying appliance

US6254684A · kind A · utility

Assignee

• ABB RESEARCH LTD. · CH

Inventors

• Gunter Borner · Radevormwald, DE
• Hans-Christoph Nienburg · Heidelberg, DE
• Josef Wittmann · Hockenheim, DE
• Helmut Bohme · Dresden, DE

Key dates

• Filing date: Jun 7, 1999
• Grant date: Jul 3, 2001
• Expiry date: Jun 7, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B5/032
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A powder-spraying appliance for electrostatic powder coating of work pieces. In order to achieve particularly good charging of powder particles, the powder-spraying appliance contains a chamber, into which a powder/air mixture is introduced transversely to a spraying direction via a supply conduit. An earth electrode and a plurality of high-voltage electrodes are disposed in the chamber. All of the electrodes are flushed with cleaning air in order to avoid powder deposits on the electrodes.