If you already have a solvent cleaning unit fitted with ultrasonics, why  
not fabricate a wire cage to contain the parts and just run them thru with 
PWAs  that are being defluxed? The typical PWA cleaning cycle time should be 
enough to  get the parts cleaned, unless you are trying to remove chlorinated 
sulphonated  cutting/stamping oils/greases. In that case you'd probably 
need to go to a  separate U/S unit using trichloroethylene solvent to get the 
job done in a short  time frame. 
You might try renting a unit from one of the U/S equipment makers or  
retrofitters if this is an ongoing project. If just a once or twice process,  
perhaps one of the above would run it for you in their demo lab.
Now the big question-- why aren't the parts makers cleaning the parts  
themselves?? 
 
 
Bill  Kenyon
Global Centre Consulting
3336 Birmingham Drive
Fort Collins, CO  80526
Tel: 970.207.9586   Cell: 970.980.6373
 
 

 
In a message dated 6/29/2009 9:31:21 A.M. Mountain Daylight Time,  
[log in to unmask] writes:

Technet,

We are being asked by one of our customers to clean  some parts (screws, 
washers, standoffs, feedthrus) in an ultrasonic cleaner  with either Methanol 
or IPA (spectroscopic grade).
The time in the  ultrasonics could be up to 1 hour.
Does anyone else have experience and  recommendations for doing this?
My main concern is safety.  What type  of room or enclosure do we need for 
this?

Thanks,
John  Anselmo

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