Method and apparatus for producing coated fasteners

Details Method and apparatus for producing coated fasteners Method and apparatus for producing coated fasteners

B - Operations, Transporting

05

B

B05B 7/14 (2006.01) B05B 13/06 (2006.01) B05B 15/04 (2006.01) B05D 7/22 (2006.01) F16B 33/06 (2006.01)

Patent

CA 2131536

An apparatus for coating internally threaded fasteners (28), particularly closed end fasteners, such as flanged weld nuts, which includes a powder spray arrangement (20) which has a spray nozzle within a spray cylinder (48). The spray nozzle arrangement is actuated by an air cylinder (16) to be in abutting relationship with a fastener seated in the spray position. The spray nozzle (68) is tapped for the supply of air (46) and for the supply of powder (44) to the fastener threads. The spray cylinder (48) is taped at a position just above its open lower end to form a vacuum exhaust (56). As a result, excess powder in the area of the coated threads of an enclosed fastener, with only one aperture for access to the threads, may be removed.

Un appareil d'enduction d'éléments de fixation (28) à filetage intérieur, notamment des éléments de fixation à extrémité fermée, tels que des écrous à souder à embase, comprend un pulvérisateur (20) avec un bec pulvérisateur situé dans un cylindre pulvérisateur (48). Le pulvérisateur est actionné par un cylindre pneumatique (16) jusqu'à abouter un élément de fixation retenu dans la position de pulvérisation. Le bec pulvérisateur (68) est percé de manière à fournir de l'air (46) et de la poudre (44) aux filets des éléments de fixation. Le cylindre de pulvérisation (48) est percé juste au-dessus de son extrémité inférieure ouverte de manière à former un aspirateur à vide (56). Par conséquent, l'excédent de poudre peut être enlevé de la zone des filets enduits d'un élément de fixation fermé n'ayant qu'une ouverture d'accès aux filets.

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