Apparatus for feeding powder coating apparatus with a powder-air mixture

DETAILED DESCRIPTION It is therefore an object of the present invention to create a means for supplying powder coating apparatus with whose assistance one succeeds in significantly improving conveying uniformity and metering precision and in supplying a plurality of powder coating apparatus independently from one another with respect to throughput quantity and air proportion of the powder-air mixture proceeding from a single reservoir.
This object is achieved in an apparatus for feeding powder coating apparatus with a powder-air mixture, whereby the powder is fluidized in a powder reservoir and the powder-air mixture thereby arising is conveyed to the powder coating apparatus via an intermediate container that is likewise equipped with a fluidization means, the intermediate container comprising a dosing container closely proximate to the coating apparatus and having a cyclone-like air separator, a fluidization means and a dosing means for producing a dosed powder air mixture, and a convey or means for conveying the dosed powder-air mixture to the powder coating apparatus.
For maintaining a rated moisture value of enamel powder that is conditioned with respect to its temperature and moisture, German Published Application 37 29 705 in fact discloses that additional, moistening fluidization air be added to the conditioned powder-air mixture in a coating container coming from the preparation container when this moisture content drops.
The system disclosed therein, however, serves only the purpose of setting the moisture content and the temperature of enamel powder.
No separation of the air from the supplied, conditioned powder-air mixture thus ensues in the coating container.
One advantage of the solutions of the invention is that composition and volume of the powder-air stream can be matched to the respectively desired coating quality by separating the air from the incoming powder-air mixture, fluidization and dosing of the remaining powder in a dosing container allocated to a single powder coating apparatus, despite the fact that only a single reservoir is provided for a plurality of powder coating apparatus