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Date: | Mon, 19 May 1997 10:00:24 GMT |
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In message <[log in to unmask]> Daryl Muma writes:
> I'm looking for info on "sandbags", or similar techniques, used to
> prevent the unseating of larger thru-hole components from PCB's through
> the wave solder process. Any vendors, contacts or experience is
> appreciated.
Daryl,
I've not seen these offered commercially before. However, you might consider
making up some yourself. You can buy high temperature 'beans' or 'peas' (not
sure what they _actually_ are) from a cooking shop. They are used to keep an
otherwise empty pie crust flat when baking - you fill the pie with these
things, bake, then remove and fill the pie with some yummy stuff at a later
date.
They should withstand topside wave solder temperature OK. Just sew them into
some sort of bag... hmm, perhaps made from a non-flammable fabric.
The idea works OK for the right problem. Pretty cheap too. They might get a bit
flux-fumey after a while, so perhaps best thought of as a consummable.
If you try it, please let us know how they work.
Peter
P.S. 'Baking' AND 'Sewing' on TechNet - what next?
--
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Peter Swanson Oxfordshire, England
INTERTRONICS
[log in to unmask] http://www.cygnetuk.demon.co.uk
Suppliers of materials and consumables to the electronics & related industries
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