Method for the powder pack coating of hollow bodies

Details Method for the powder pack coating of hollow bodies Method for the powder pack coating of hollow bodies

1991-11-05

1993-06-01

Beck, Shrive

Coating processes

Interior of hollow article coating

427235, 427239, 427242, 427252, 427253, 118717, B05D 722

Patent

active

052157857

ABSTRACT:
A method for the powder pack coating of hollow structural components is performed with spherical powder particles of a donor metal in which the hollow component is embedded. During the embedding, the component is subjected to a tumbling motion about several spatial axes to fill all cavities in the component. After the powder pack coating process the cavities of the component are cleared of any excess powder particles under the action of a gas stream. This method is suitable especially for coating engine blades having cooling ducts and cooling air holes, such as turbine blades. The effect of the forced air flow through the internal cavities for the removal of excess powder out of the hollow component is enhanced by simultaneously vibrating the component.

REFERENCES:
patent: 4041196 (1977-08-01), Baldi et al.
patent: 4156042 (1979-05-01), Hayman et al.
"Stahl-Eisen-Pruefblaetter", Number 82-69 (1969) of the Verein Deutscher Eisenhuettenleute.

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