Powdered brazing flux contg. metal salt and acrylic! resin - applied by electrostatic powder coating

Metal components are coated prior to assembly by brazing with a mixt. of (a) a powdered mineral salt flux capable of dissolving metal oxides and (b) a powdered acrylic resin. The powder is applied by electrostatic powder coating techniques. Pref. acrylic resin is a poly alkyl(meth)acrylate, and esp....

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Bibliographische Detailangaben
1. Verfasser:	MICHEL DAUVERGNE ET GILBERT MARTIN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	Metal components are coated prior to assembly by brazing with a mixt. of (a) a powdered mineral salt flux capable of dissolving metal oxides and (b) a powdered acrylic resin. The powder is applied by electrostatic powder coating techniques. Pref. acrylic resin is a poly alkyl(meth)acrylate, and esp. polybutylmethacrylate. Pref. flux compsn. comprises 75 % boric acid, 20 % borax and 5 % polybutylmethacrylate; or 71 % boric acid, 18 % borax and 11 % polybutyl methacrylate. The powders are applied e.g. by electrostatic unit or by electrostatic gun fed by compressed air. The flux compsn. has good adhesion to the metal and gives improved brazed joints. PROCEDE DE REVETEMENT DE PIECES METALLIQUES A BRASER AU MOYEN D'UN FLUX PULVERULENT.ON MELANGE A UN SEL MINERAL CAPABLE DE DISSOUDRE LES OXYDES METALLIQUES, UNE RESINE ACRYLIQUE ET ON APPLIQUE LE MELANGE SUR LES PIECES A BRASER PAR POUDRAGE ELECTROSTATIQUE.L'INVENTION S'APPLIQUE EN PARTICULIER A L'OXYBRASAGE AUTOMATISE DES METAUX FERREUX, DES METAUX CUIVREUX ET DES ALLIAGES A BASE D'ALUMINIUM.