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1996

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Subject:
From:
[log in to unmask] (Jack Crawford)
Date:
Wed, 29 May 1996 15:42:41 -0500
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From the EMPF HelpLine in IndianapolisŠ

We have a customer that is requesting assistance with a metal stamping
problem. They produce small brass contacts (alloy 260 cartidge brass) that
are about 1/8" square and 2" long using mineral spirits as a lubricant in
the stamping process.

They are supposed to provide these "oil free" to the next assy level that
pots them into a sub-assy and has a soldering operation involving the
contacts. That sub-assy is then sent to a third party where it is placed
into another assy. A residue left on the contacts is interferring with both
the potting and soldering operations, but mostly with the potting. Someone
in the loop is suggesting the use of a water-soluble lubricant in the
stamping process instead of the mineral spirits. Quantities are medium high
now, but into the millions down the line.

The questions we pose are:

1) Can anyone recommend an alternate stamping lubricant that won't be
difficult to clean?

2) If or if not a different lubricant, howabout a recommended cleaning
material/process?

Ideally, there would be an oil-free lubricant that wouldn't require
cleaning because it wouldn't interfere with the potting compound or the
soldering operation.

Thanks for your inputs.

                      Jack Crawford
                  HelpLine Manager
    Electronics Mfg. Productivity Facility
                     317.226.5616
               Visit our homepage at:
                http://www.empf.org




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