Powder pump with vacuum filling

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 7/14 (2006.01) B05B 7/24 (2006.01) B05C 19/06 (2006.01) B05D 1/00 (2006.01)

Patent

CA 2659719

A powder supply system for a powder-coating installation, especially a parts painting installation using electrostatic powder, according to the invention, comprises a tank (2) designed to contain the powder, means (4, 5, 6) for feeding powder into the tank (2), means (15, 14) for injecting compressed air into the bottom of the tank (2) in order to fluidize the powder, and an exit pipe (8) in which the powder is entrained by the air from the tank (2), this pipe (8) being connected to at least one powder using device situated at a distance, in particular a spray gun (9). The system also includes means (16, 17, 18, 19) for reducing the pressure in the tank (2) below that of the feed means (4, 5, 6) in order to fill the tank (2) with powder.

Un équipement d'alimentation en poudre pour une installation de poudrage, en particulier une installation de peinture de pièces utilisant de la poudre électrostatique, selon l'invention, comprend un réservoir (2), prévu pour contenir de la poudre, des moyens d'amenée (4, 5, 6) de poudre à l'intérieur du réservoir (2), des moyens d'injection d'air comprimé (15, 14) dans la partie basse du réservoir (2), pour fluidiser la poudre, et un tuyau de départ (8) de la poudre entraînée par l'air, depuis le réservoir (2), ce tuyau (8) étant relié à au moins un dispositif d'utilisation de la poudre situé à distance, en particulier un pulvérisateur (9). L'équipement comprend de plus des moyens de mise en dépression (16, 17, 18, 19) du réservoir (2) par rapport aux moyens d'amenée (4, 5, 6) pour le remplissage en poudre du réservoir (2).

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