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Re: Alternative parts cleaning

Dear all,
there is the possibility to clean metal parts with corn stalks. I have
seen such a unit in the US during my visit last year.  It should work
with your problem. "Dry washing" with the granulates eliminates water,
detergents and the energy for drying. It could also give better results
for a cleaner surface.
If you need, I could find out more. The company visit for us Europeans
has been arranged by Jack Luskin from Toxics Use Reduction Institute 
Lowell Center for Sustainable Production University of Massachusetts; he
could help as well.

Hans Schnitzer, Austria

"Callahan, Mike" schrieb:
> Judith,
> I'm going to assume that your washing station employs a hydrocarbon solvent.
> You could convert to a water-based cleaner but then you would need to follow
> up with a drying system to prevent rusting.  The large volume of small parts
> you are handling means that you are looking at quite a change in the
> existing operation.
> Since the cutting oil does provide rust protection during transit and the
> voiced objection is over spillage, your client might be able to make due
> with an oil removal system.  One approach is to use a "chip wrangler" where
> the parts are spun inside a basket and the oil is spun off.  This approach
> is widely used to remove oil from metal cuttings and it might be suitable
> for this application.  Part size, shape, and their ability to withstand
> damage due to impact will be key deciding factors.
> The other approach would be vacuum deoiling where the storage drum would be
> placed inside a sealed oven, heated slightly, and the interior placed under
> vacuum.  This will drive off much of the free oil.  The downside with both
> of these approaches is that the receiving facility will most likely need to
> clean the parts before use.  Hope this helps.
> Mike.callahan@jacobs.com
> -----Original Message-----
> From: Judith Wlodarczyk [mailto:jwlodarc@connstep.org]
> Sent: Wednesday, December 05, 2001 11:18 AM
> To: envgroup-list@mep.nist.gov; p2tech@great-lakes.net
> Subject: Alternative parts cleaning
> I have a client that manufacturers small carbon steel parts for the
> automobile
> industry.  They stamp and form the parts from rod-drawn wire on large
> presses
> using Renocut 464, a petroleum cutting oil, at the rate of 35 parts/minute
> coming off the presses.  The oil helps lubricate the cutting as well as the
> die
> movement.  We are looking to eliminate one of the cleaning steps, which has
> become a bottleneck, as all parts produced in the factory are cleaned at one
> wash station, causing parts to sit and not flow at the rate we have
> targeted.
> The cleaning step we would like to eliminate occurs after the parts come off
> the
> press and before they are shipped out for off-site services.  They have
> explored
> other lubricants with little success.
> The outside vendors have required the cleaning because they do not want to
> be
> responsible for oil draining off the parts during transportation, causing a
> spill that they will be responsible for cleaning up.  The parts are shipped
> in
> metal containers, holding 18,000-21,000 parts (2000 lbs.) and have to have a
> trap door to enable the vendor the easily remove the parts from the
> containers.
> Questions
> 1.  Is there another way that would remove the oil without having a separate
> wash operation?  For examples, could we use a centrifuge at the press or are
> there in-line washers that you have had experience with that would work with
> this quantity of parts?
> 2.  Are there other cutting oils available that could provide the
> lubrication
> necessary for this operation, facilitating the cutting and the die movement,
> yet enable us to eliminate the wash?
> Thanks,
> Judy Wlodarczyk
> Environmental Management Specialist
> 1090 Elm St.
> Suite 202
> Rocky Hill, CT  06067
> www.connstep.org
> Phone:  860-644-9718
> Fax:       860-529-5001
> Email:    jwlodarc@connstep.org
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