Single-gas plasma cutting torch

摘要

A single-gas plasma cutting torch (1) comprises: a nozzle (5) from which the plasma issues; a hollow electrode (6) opposite in polarity to the nozzle (5), partly housed in the nozzle (5) and delimiting with the latter a plasma generating chamber (7); a torch body (2) extending principally along an axis (D); a nozzle holder (8) for supporting the nozzle (5) and mounted at one end of the torch body (2); the nozzle (5) and the electrode (6) are fed by respective supply systems (4, 9, 17, 16) which are isolated from each other; the torch (1) comprises a gas flow circuit (15) for cooling the electrode (6) and the nozzle holder (8) and for generating the plasma, the gas flow circuit having a vent between the nozzle holder and the torch body.