POWDER WEIGHT OR VOLUMETRIC OR COUNTING FEEDER

摘要

In a powder quantitative supply apparatus according to the present invention, fluidizing air is blown from a controller 28 into an air chamber 13 of a pressurized powder hopper 11 to maintain a powder coating material F in a fluidized state and pressurize the inside of the pressurized powder hopper 11. In a state where the outlet portion of a screw feeder 14 and the inside of the pressurized powder hopper 11 are mutually kept at equal pressures through an equalizing line 20, a drive current is supplied from the controller 28 to a motor 18 and transport air is supplied to a pressure-feeding nozzle 19. Thus, the screw of the screw feeder 14 rotates so as to discharge the fluidized state powder coating material F from the inside of the pressurized powder hopper 11 to be guided to the pressure-feeding nozzle 19. The powder paint is thus sprayed from the pressure-feeding nozzle 19 to an object to be coated by the transport air.