Abstract:
La présente invention concerne un procédé d'application de peinture poudre à polymérisation UV sur pièce métallique, caractérisé en ce qu'il comprend les étapes successives suivantes : le traitement mécanique de la surface de la pièce métallique par impact et/ou le traitement chimique de la surface de la pièce métallique, ledit traitement chimique comprenant une étape de conversion chimique de la surface métallique, l ' application de la peinture sous forme de poudre thermodurcissable photoréticulable à la surface de la pièce métallique, et la cuisson de la peinture, ladite cuisson comprenant : une fusion de la poudre aux rayons Infra Rouge (IR), puis une polymérisation de la poudre fondue par rayonnement Ultraviolet (UV).
Abstract:
A dense phase powder coating system includes a powder supply, dense phase pump, a spray gun and a diverter valve that can be used to select between conveying powder to the spray gun or circulating the powder back to the powder supply. The diverter valve may include two pneumatically actuate valve members. In one embodiment, the powder spray gun applies powder coating material to inside surfaces of a tubular container. A spray nozzle concept also is presented having a nozzle body with a conical deflector. The spray nozzle provides an uninterrupted flow between spray nozzle outlet holes and a deflector surface. The deflector may be integrally machined with the nozzle body to provide a one piece spray nozzle.
Abstract:
La présente invention se rapporte à une buse de pulvérisation, à un dispositif de pulvérisation comprenant une telle buse, ainsi qu'à un procédé de pulvérisation mettant en jeu un tel dispositif. Plus précisément, la présente invention se rapporte à une buse (1) de projection de produits solides pulvérulents destinés au revêtement d'objets, ladite buse comportant un corps (2) de forme sensiblement cylindrique, caractérisée en ce que le corps est traversé de part en part par au moins deux tunnels (6) isolés l'un de l'autre, chaque tunnel (6) se développant de manière hélicoïdale autour d'un axe (3) principal de la buse. Les tunnels sont alimentés de manière indépendante en un mélange fluide / solide(s) pulvérulent(s). La forme hélicoïdale des tunnels permet d'obtenir un jet puissant, de forme conique, apte au recouvrement de surfaces internes d'objets tubulaires.
Abstract:
The present invention generally relates to an electrostatic coating apparatus for spraying a stream of particles onto a medium, and in particular to an apparatus equipped with a powder coating suspension device such as a multivolume chamber, or a air stream creation device. What is also contemplated is the use of a plurality of variable openings in the enclosure, used in conjunction with a plurality of conductors, to dispose a stream of particles onto a moving medium in successive layers. In yet another embodiment, the stream of particles is directed in a directional electrical field created by electrodes placed adjacent to directional shields. The present disclosure relates to an in-line industrial device able to coat paint, starch, thermoplastic materials, or any other powder material onto a medium by successively controlling a plurality of parameters.
Abstract:
A nozzle for a powder spray gun (12) optionally includes an internal filter (28) that allows air to be added to the powder flow within the nozzle shell (24). The nozzle may optionally include an off-axis outlet slot (30b) relative to a main flow axis of the powder into the nozzle shell (24) so that powder encounters an obstruction before exiting through the outlet slot (30b).
Abstract:
A nozzle for a powder spray gun optionally includes an internal filter that allows air to be added to the powder flow within the nozzle shell. The nozzle may optionally include an off-axis outlet slot relative to a main flow axis of the powder into the nozzle shell so that powder encounters an obstruction before exiting through the outlet slot.
Abstract:
A powder spraycoating gun and its gun housing. The spraygun housing (2) is a plastic, integral body constituting a stock (4) fitted with a powder discharge tube (20) and a grip (6) fitted with a powder intake tube (10).
Abstract:
A powder atomizer comprises a rotatable powder conveying brush operably associated with a powder supply. A powder receptacle has an inlet and an outlet. The powder conveying brush extends along the inlet and supplies powder to the receptacle. A rotatable powder metering brush is operatively associated with the outlet and withdraws powder from the receptacle. A rotatable powder atomizing brush is operatively associated with and receives powder from the metering brush and discharges the powder. A shoe is operatively associated with the atomizing brush, and is pivotable about a pivot axis between a first and a second position.