POWDER COLLECTION METHOD AND APPARATUS WITH ISOLATED FILTER PULSING AND COMPRESSION MOUNTED CARTRIDGES

摘要

An apparatus and method of dislodging particles of powder material from the exterior of cartridge filters in the powder recovery unit of a powder spray system. In the powder recovery unit, particles of powder material collect on the cartridge filters as filtered air enters the hollow interior of the cartridge filters and moves toward the open tops thereof. Periodically, the flow rate of the filtered air through a cartridge filter is reduced and a pulse of air is directed into the open top of that cartridge filter, in a direction opposite to the normal direction of movement of the filtered air, to dislodge the particles from the cartridge. In addition, the cartridge filters are vertically disposed and compression mounted in such a way that the cartridge support hardware does not obstruct the air flow through the top opening of the cartridge filter.