H - Electricity – 05 – H
Patent
H - Electricity
05
H
H05H 1/42 (2006.01) C23C 4/12 (2006.01) H05H 1/34 (2006.01)
Patent
CA 2102284
The plasma spray apparatus for spraying powdery material, particularly for the coating of the surface of a work piece, comprises an indirect plasmatron adapted to create an elongated plasma torch, having a central longitudinal axis and means for feeding the powdery material into the plasma torch. The plasmatron comprises a cathode assembly having at least three cathode members evenly distributed along a circle around the central longitudinal axis of the plasmatron, an annular anode member located distantly from the cathode member and a plasma channel extending from the cathode assembly to the anode member. The plasma channel is delimited by the annular anode member as well as by a plurality of annular neutrode members which are electrically insulated from each other, and the means for feeding the powdery material into the plasma torch are located close to the anode member.
L'appareil de projection par plasma pour pulvérisation de matières en poudre, particulièrement pour le revêtement de la surface d'une pièce, comprend un plasmatron indirect adapté de manière à créer une torche à plasma allongée, ayant un axe central longitudinal, et un dispositif permettant d'introduire la matière poudreuse dans la torche à plasma. Le plasmatron comprend : un assemblage cathodique comportant au moins trois éléments cathodiques distribués régulièrement sur un cercle autour de l'axe central longitudinal du plasmatron; un élément anodique annulaire situé à distance des éléments cathodiques; et un canal à plasma s'étendant depuis l'assemblage cathodique jusqu'à l'élément anodique. Le canal à plasma est délimité par l'élément anodique annulaire, ainsi que par plusieurs neutrodes annulaires isolées électriquement l'une de l'autre. Le dispositif d'introduction de la matière poudreuse dans la torche à plasma est situé à proximité de l'élément anodique.
Cassan Maclean
Plasma-Technik Ag
LandOfFree
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