Method and apparatus for applying a metallic coating to threaded

Details Method and apparatus for applying a metallic coating to threaded Method and apparatus for applying a metallic coating to threaded

1990-11-15

1992-09-08

Bell, Janyce

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 37, 427256, 427284, 427423, 427425, 427427, B05D 100, B05D 108

Patent

active

051457105

ABSTRACT:
A metallic coating is applied to threaded sections on the ends of plastic pipes that are to be forcefully screwed together. Droplets of a metal or metallic alloy are sprayed against the threaded sections at a high velocity, at a selectable angle of impingement, and within a zone of impingement. During the spraying, the pipe is turned and also moved relative to the zone of impingement in a longitudinal direction of the pipe. The resulting metallic coating on the pipes, beneficially, is porous so that such coating may contain lubricant, for instance. The apparatus for carrying out the spraying method includes a rotable pipe-holding device, and an arc metal spray unit having a nozzle whose direction of emission is adjustable.

REFERENCES:
patent: 3019014 (1962-01-01), Miksis
patent: 4397893 (1983-08-01), Bottoms
patent: 4464414 (1984-08-01), Milewski et al.
patent: 5019429 (1991-05-01), Moskowitz et al.
patent: 5069761 (1991-12-01), Krings et al.

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