초록 ▼

A method and apparatus for coating piston rings by producing droplets of molybdenum and stainless steel from these materials in wire form which are sprayed, preferably in equal amounts to coat the outer surfaces of the rings. A plurality of rings are mounted on a body which are moved in a helical pa

A method and apparatus for coating piston rings by producing droplets of molybdenum and stainless steel from these materials in wire form which are sprayed, preferably in equal amounts to coat the outer surfaces of the rings. A plurality of rings are mounted on a body which are moved in a helical path during the spraying. A nozzle is used having a central passage through which the wire is fed and two sets of passages, one set for an oxy-acetylene mixture and the other for compressed air, with the outlet orifices of the two sets of passages arranged in concentric rings around the central passage outlet orifice.

대표청구항 ▼

A nozzle for forming droplets of molten metal from the metal in wire form and spraying the droplets of molten metal comprising: a nozzle body having an outlet end and a central passage through said body having an outlet orifice at said outlet end through which the wire is fed, a first set of passage

A nozzle for forming droplets of molten metal from the metal in wire form and spraying the droplets of molten metal comprising: a nozzle body having an outlet end and a central passage through said body having an outlet orifice at said outlet end through which the wire is fed, a first set of passages in said nozzle body through which compressed air is fed and a second set of passages in said nozzle body through which an oxygen-acetylene fuel is fed, each passage having an outlet orifice at the nozzle body outlet end, the outlet orifices of said first and second sets of passages each arranged in a respective pattern around the central passage outlet orifice, the outlet orifices of the first set of passages for feeding compressed air being closer to the central passage outlet orifice than the outlet orifices of the second set of passages, and the outlet orifices of said first set of passages directing compressed air toward said outlet orifice of said central passage and the wire passing therethrough.