FLAME SPRAYING APPARATUS AND THERMAL SPRAYING PROCESS

摘要

A flame spraying apparatus, in particular a high-velocity flame spray gun (10), for the thermal spraying of metallic and non-metallic spray materials in powder or wire form by means of a flame comprising a liquid or gaseous fuel and an oxidation gas, which flame is produced in a combustion chamber (26) and accelerated in a constriction tube (34), has a water-cooled torch system which includes at least three parts, with combustion chamber (26), a constriction tube (34) and a flame constriction passage (32). The constriction tube (34) is mounted interchangeably and is associated with at least one seal (40) which is subjected to the pressure effect of a force storage means (42). Associated with that seal (40) for the inserted constriction tube (34) is at least one helicoidal spring (42) or at least one leaf spring (66) as the force storage means.