METHOD AND DEVICE FOR SPRAYING POWDER Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: powder is subjected to a vertical pulsating air flow and simultaneously to vibrations. The vertical air flow pulse frequency is chosen to be equal to the vibrational frequency. Moreover, the tank in a powder spraying device has a packing made in the form of coaxial hollow cylinders mounted coaxially with the tank, the cylinders are fastened to the tank bottom by bases, the lower bases are fastened to the cover tightly closing the cavity between the cylinders where an annular insert from a porous material is positioned, the insert is pressed to the tank bottom. The outer cylinder has a branch pipe connected to a device for feeding the pulsating air flow to the cavity between the cylinders. The inner cylinder connects the netted bottom of the tank to the branch pipe for feeding the powder to a mixing chamber. EFFECT: improved quality. 3 cl, 2 dwg