Apparatus for and method of metalizing internal surfaces of meta

Details Apparatus for and method of metalizing internal surfaces of meta Apparatus for and method of metalizing internal surfaces of meta

1983-03-14

1984-12-25

Kittle, John E.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427182, 427183, 427233, 427234, 118306, B05D 722, B05D 302

Patent

active

044904118

ABSTRACT:
An apparatus and method for metalizing the interior of pipes or tubes is disclosed. The base metal pipe or tube to be internally metalized is moved axially while simultaneously being rotated at a relatively high rpm. A first pre-heat means, preferably an induction heating means, heats a portion of the pipe and its interior to a first elevated temperature, and particles of the metalizing material are deposited into the interior of the pipe to be heated to said first elevated temperature. The rotation of the pipe distributes the fluidized particles into laminae which, under the further influence of centrifugal forces, automatically distributes the semi-fluidized particles effectively. The fluidized metalizing material is bonded together and to the body substrate by application of a second induction heat at a higher heat level or temperature at which bonding occurs between the laminae of metalizing material and between the metalizing material and the base material of the tube or pipe. Preferably the process is performed in the presence of a non-oxidizing gas such as pre-heated nitrogen. Various means for delivering the metalizing powder to the interior of the pipe are disclosed.

REFERENCES:
patent: 2803559 (1957-08-01), Rutherford et al.
patent: 3007810 (1961-11-01), Hobrock
patent: 3814616 (1974-06-01), Kondo et al.
patent: 3974306 (1976-08-01), Inamora et al.
patent: 4197336 (1980-04-01), Savchenko et al.
patent: 4243699 (1981-01-01), Gibson
patent: 4302482 (1981-11-01), Heck

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