Method and apparatus for cleaning electronic and other devices

Details Method and apparatus for cleaning electronic and other devices Method and apparatus for cleaning electronic and other devices

B - Operations, Transporting

08

B

141/12

B08B 7/04 (2006.01) H05K 3/26 (2006.01)

Patent

CA 2011397

A method and apparatus for cleaning workpieces, particularly printed circuit boards upon which electrical components have been soldered, is capable of using a potentially flammable or explosive liquid cleaning solvent. In one embodiment, there are two immersion wash stages between which is a spray wash stage. The spray wash stage is formed as a closed chamber which is sealed when the immersion wash stages by liquid seals. To reduce the danger of fire or explosion in the spray wash stage an inert gas such as Nitrogen is introduced into the closed chamber. In another embodiment the spray nozzles are immersed in liquid solvent in a combined immersion/spray wash stage. This reduces atomization of the flammable solvent further reducing the danger of fire or explosion.

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