METHOD FOR UNIFORM EJECTING OF PNEUMATIC POWDER FEEDER

摘要

PURPOSE:To prevent the pulsating phenomenon of a material being ejected from occurring at the time of a change in spraying quantity, by packing volume- reducing members into openings of a rotary grating provided for a pneumatic powder feeder to change the volume of the openings to a predetermined volume, and controlling the rotating speed of the rotary grating, in ejecting a powder. CONSTITUTION:The volume of each opening in a rotary grating 12 is regulated by an easily detachable volume-reducing member 19 according to the required quantity of a material to be applied per unit time, and a lead gun is operated at a rotating speed of the grating which is set according to the regulated volume. With the volume of each opening 15 in the rotary grating 12 changed to 1/2-1/8 of an original value, the rotating speed of the grating for a given ejection quantity is enlarged to 2-8 times of an original value. Accordingly, the period of time required for a partition plate 16 to cross an ejecting port is shortened to 1/2-1/8 of that in a conventional arrangement, so that the material to be ejected is continuously ejected, and the pulsating phenomenon will not occur.