Flame spraying apparatus and thermal spraying process

Details Flame spraying apparatus and thermal spraying process Flame spraying apparatus and thermal spraying process

B - Operations, Transporting

05

B

B05B 7/20 (2006.01) C23C 4/12 (2006.01)

Patent

CA 2225073

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.

Dispositif de projection à la flamme, en particulier pistolet de projection à la flamme haute vitesse (10). Il sert à la projection à chaud de matériaux pulvérisés métalliques et non métalliques sous forme de poudre ou de fil à l'aide d'une flamme comprenant un liquide ou un combustible gazeux et un gaz oxydant. Produite dans une chambre de combustion (26) cette flamme est accélérée dans un tube d'étranglement (34). Le dispositif comporte une torche comptant au moins trois parties, soit la chambre de combustion (26), le tube d'étranglement (34) ainsi et un passage confinant la flamme (32). Le tube d'étranglement (34) est installé de manière interchangeable et est associé avec au moins une joint d'étanchéité (40) qui subit l'effet de pression d'un mécanisme de stockage de la force (42). En plus du joint d'étanchéité (40) du tube d'étranglement inséré (34), il y a au moins un ressort hélicoïdal (42) ou au moins un ressort à lame (66) qui joue le rôle de mécanisme de stockage de la force.

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