Method for coating inner surfaces of metal tubes with powdery pa

Details Method for coating inner surfaces of metal tubes with powdery pa Method for coating inner surfaces of metal tubes with powdery pa

1998-04-23

2000-02-01

Bell, Janyce

Coating apparatus

With means to centrifuge work

Coating inside of hollow work

118306, 118318, 118309, 427182, 427231, 427234, 427314, 427318, B05C 1102

Patent

active

060198451

ABSTRACT:
A method for coating an inner surface of a metal tube comprises supplying a hot-melt resin powdery paint floating in air together with an air stream into the metal tube which has been pre-heated and rotating around it's horizontal center axis. An apparatus used for the method comprises a rotating means for supporting and rotating the metal tube, fluidizing bed tank for floating the powdery paint in air, a paint supply pipe, an air pipe and a Y-shaped mixing pipe through which the powdery paint is supplied to the inside of the metal tube in the form of a jet. The inner surface of the metal tube can be coated uniformly in a very short period of time.

REFERENCES:
patent: 3208869 (1965-09-01), Starr et al.
patent: 3379174 (1968-04-01), Vodicka
patent: 3982050 (1976-09-01), Kato et al.
patent: 4089998 (1978-05-01), Gibson
patent: 4243699 (1981-01-01), Gibson

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