A gas supply system for a powder-fluidizing apparatus

Details A gas supply system for a powder-fluidizing apparatus A gas supply system for a powder-fluidizing apparatus

B - Operations, Transporting

05

C

B05C 19/02 (2006.01) B05C 19/06 (2006.01) B05D 1/24 (2006.01)

Patent

CA 2440686

A coating apparatus includes a container and a perforated plate separating a plenum from a coating chamber. A gas supply system delivers a gas to the plenum in a sufficient amount for passage of the gas through the plate and suspension of a powder in a fluidized condition in the chamber. The gas supply system preferably includes a primary portion for continuously delivered gas and a controllable pulsing portion for supplementing the gas from the primary portion. In a first mode of operation, the gas from the pulsing portion is cycled to provide variation in the fluidized volume. In a second mode, the pulsing portion delivers relatively long pulses of gas to mix the fluidized powder.

L'invention concerne un appareil de revêtement qui comprend un contenant et une plaque perforée séparant un plénum d'une chambre de revêtement. Un système d'alimentation en gaz achemine un gaz au plénum de manière suffisante pour le passage du gaz à travers la plaque et la suspension d'une poudre dans une condition fluidisée dans la chambre. Le système d'alimentation en gaz comprend de préférence une partie primaire pour l'acheminement continu du gaz et une partie pulsante contrôlable pour assurer la supplémentation du gaz de la partie primaire. Dans un premier mode d'opération, le gaz de la partie pulsante est cyclé pour fournir une variation dans le volume fluidisé. Dans un deuxième mode, la partie pulsante assure des pulsions relativement longues de gaz pour mélanger la poudre fluidisée.

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