Posted by Richard Barnwell (81.159.194.72) on 15:26:56 03/03/06
: I'm looking for way to create a dense pattern of
electrically-conductive high points (bumps) on an aluminum
surface without stamping or diecasting. What I'm really looking
for is a way to "knurl" a flat surface or create a dense,
diamond-like pattern. I know about tread plate but my part is too
thick and irregular(and the pattern has to dense) to stamp
the pattern into it. Also, my volumes will be low so powder
metallurgy and other high-volume methods would not be worthwhile.
I'm open to ideas and I am grateful for your input.
: Have you considered generating a mirror image (a mother)
from a precision made master by electroforming? Electroforming
is a high speed plating process normally depositing an alloy of
nickel and cobalt from a nickel and cobalt sulphamate plating
solution.
From this mother you could make an insert for an injection moulding
tool and injection mould the part (a daughter) in a
suitable material. (You could also make a multi impression tool
if you need the part in volume).
You could then render the part conductive by electroless plating
with copper or nickel processes and then using conventional plating
if you need a thicker deposit for current carrying purposes. I hope
this helps.
:
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