APPARATUS FOR ELECTROSTATIC APPLICATION OF POWDER-SHAPED MATERIALS ON INNER SURFACE OF PIPES Russian patent published in 1995 - IPC

FIELD: powder-shaped materials application. SUBSTANCE: body of spraying head is made of dielectric material. Spraying mean is made in the form of uniformly located along body perimeter cylindrical canals, in jet of each of which there is additional high-voltage electrode made in the form of sharpened rod. Main high-voltage electrode is made in the form of fixed on deflector disk-shaped cutter with cutting edge, that is continuation of concave surface of deflector to output butt. Effectiveness of powder particles charging is increasing due to additional charging on sharpened edge of disk-shaped cutter. In the case particles received inner and outer charging during their passing through each jet. EFFECT: improved quality of powder materials application on inner surface of cylindrical pieces. 3 dwg