Unipolarity powder coating systems including improved tribocharging and corona guns

A technology of friction electrification and electrification polarity, which is applied in the direction of friction discharge spraying, electrostatic spraying device, spraying device, etc., and can solve problems such as internal corner spraying of parts that cannot be sprayed, damage to powder conveying parts, etc.
CN1635932AInactive Publication Date: 2005-07-06NORDSON CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORDSON CORP
Publication Date
2005-07-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention describes a variety of unconventional tribo-negative materials for use as powder contact surfaces in tribo- and corona powder spray guns, in-gun components, and powder delivery system components. The present invention also provides a short barrel triboelectric powder spray gun having interchangeable powder contact inserts and nozzles. The present invention further provides a new type of friction electrification and corona gun structure. The improved powder coating system allows the use of a triboelectric negative gun with a negative corona gun to coat different parts of the same part in the powder coating system. The present invention also provides an inside-out structure in which pressurized air directs the powder coating to the charged surface. In other configurations of the present invention, the air nozzle-induced triboelectric charging and conventional triboelectric charging parts are also combined in a single gun.
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Description

[0001] related application

[0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 09 / 724,363, filed November 28, 2000, for UNIPOLARITY POWDER COATING SYSTEMSINCLUDING IMPROVED TRIBOCHARGING AND CORONA GUNS, which is hereby incorporated by reference in its entirety this application. This application also claims priority to U.S. Patent Application UNIPOLARITY POWDER COATING SYSTEMSINCLUDING AN IMPROVED TRIBOCHARGING GUN, UNIPOLARITY GUN METHOD FOR MAKING SAME, filed July 11, 2000, with application serial number 60 / 217,216, the full text of which is hereby filed at This application is incorporated by reference. technical field

[0003] This invention relates to powder coating systems which use corona and tribocharging powder coating guns to impart an electrostatic charge to the powder to deposit the powder onto a substrate. Background technique

[0004] There are two basic types of powder coating guns commonly used when electrostatically pow...

Claims

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