Coating powder sieving device
AssigneeDürr Systems AG
InventorsHans-Georg Fritz, Marcus Treppschuh
Life of this patent
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Abstract
The invention relates to a coating powder sieving device, specifically for a powder paint coating installation, having a screen surface for sieving a coating powder. The screen surface is angular. An ultrasonic probe excites vibrations in the screen surface wherein the vibrations in the screen surface occur substantially in a direction perpendicular to the screen surface. A powder fluidization hopper incorporating the coating powder sieving device and a powder coating installation including plural powder fluidization hoppers are also disclosed.
Claims14
A coating powder sieving device, the device comprising:
- a screen portion for sieving a coating powder, wherein the screen portion includes a screen frame and a screen retained by the screen frame and having a screen surface;
- the screen frame and screen surface defining a generally quadrangular shape;
- a screen support portion supporting the screen portion, including the screen frame and the screen surface, generally in a direction perpendicular to the screen surface;
- and
- an ultrasonic probe coupled to the screen portion, including the screen frame and the screen surface, with a coupling extending between the ultrasonic probe and the screen portion such that the ultrasonic probe excites vibrations in the screen surface and the screen frame via the coupling, wherein the screen is directly supported vertically solely by the screen support and the ultrasonic probe;
- and
- a vibration absorbing element positioned laterally with respect to the screen frame such that the vibration absorbing element absorbs vibrations of the screen frame in a direction generally parallel to the screen surface, wherein the vibrations in the screen surface and the screen frame occur at least substantially in a direction perpendicular to the screen surface;
- wherein the screen and screen frame are vibrated exclusively by the ultrasonic probe.
A coating powder sieving device, the device comprising:
- a screen for sieving a coating powder, the screen retained by a screen frame and defining a screen surface;
- a circumferential frame extending circumferentially about the screen and screen frame, a screen support extending from the circumferential frame to support the screen generally in a direction perpendicular to the screen surface;
- an ultrasonic probe coupled to the screen frame and the screen with a coupling extending between the ultrasonic probe and the screen such that the ultrasonic probe excites vibrations in the screen and the screen frame via the coupling, wherein the screen is directly supported vertically solely by the screen support and the ultrasonic probe;
- and
- a vibration absorbing element positioned between the screen frame and the circumferential frame, the vibration absorbing element positioned laterally with respect to the screen frame such that the vibration absorbing element absorbs vibrations of the screen frame in a direction generally parallel to the screen surface, the vibrations in the screen and the screen frame thereby occurring substantially in a direction perpendicular to the screen surface.
Dependencies are inferred from the claim text.