DEVICE FOR DEPOSITION OF METAL COATINGS BY ELECTRIC ARC Russian patent published in 1998 - IPC

FIELD: deposition of protective coatings, in particular, equipment for electric arc deposition of metal coatings. SUBSTANCE: device has two electrodes and two symmetrical nozzles arranged in vertical plane which runs through the center of electric arc and is square to plane running through axes of electrodes. The device is also provided with additional central nozzle whose axis coincides with the line intercrossing the said planes and its cross-section is 4-60 factors smaller than the sum of cross-section area of symmetrical nozzles. EFFECT: higher efficiency of deposition by spraying due to formation of stream of particles with small spray-cone angle. 2 dwg