Method and apparatus for measuring the transfer efficiency of a

Details Method and apparatus for measuring the transfer efficiency of a Method and apparatus for measuring the transfer efficiency of a

1998-11-25

2000-09-19

Parker, Fred J.

Coating processes

Measuring, testing, or indicating

427475, 427483, 427486, 118624, 118688, 118692, B05D 104

Patent

active

061208329

ABSTRACT:
A method and apparatus for measuring the transfer efficiency during the electrostatic spraying of a coating material (e.g. powder coating) is provided. The transfer efficiency can be measured during the test cycle rather than measuring an average transfer efficiency for an electrostatic spray cycle. A cycle may include the initial time when the substrate is "uncoated or clean" and an end point of the test when electrical insulating effects caused by accumulated powder on the substrate lead to a reduction in the transfer efficiency. The method uses computer based calculation software and a computer. The computer is connected to load cells that measure weight changes of a target substrate and a vessel containing the coating material to be sprayed.

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