Method and apparatus for coating internal cavities of objects wi

Details Method and apparatus for coating internal cavities of objects wi Method and apparatus for coating internal cavities of objects wi

1989-01-13

1992-08-25

Lawrence, Evan

Coating processes

Interior of hollow article coating

Spraying

427239, 427240, 118317, 118697, 118705, 118DIG10, B05D 722, B05D 102, B05B 302, B05B 1202

Patent

active

051417740

ABSTRACT:
The present invention discloses an apparatus and process for coating hollow objects at precise bands within the internal cavity of the object. The process utilizes centrifugal force to apply the fluid to the object. A probe is moved from underneath the object thereby utilizing gravitational forces to prevent spillage of the material from the probe. A computer controls the pumping rate, the vertical movement of the probe and the rotational speed of the probe to allow the machine to precisely coat a band on the internal cavity of an article. The computer controlled operation eliminates the necessity to waste material. One application of the invention is in the coating of the threads of nuts with Teflon.

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