PVA or Taffa Black will be your best bets, but my expectations are that your
Al will peel off the SLA by about 0.15 mm rather then 2 mm. The issues of
CTE and Tm make Al a very nasty substance to work with - oh and check the
H&S regarding extraction and explosions . As an aside we regularly spray
steels directly onto SLA up to 1mm thick. Greater thicknesses are possible
but again the tendency for the shell to curl is the limiting factor.
From: Phil Malone
To: 'RP mail list'
Subject: Metal Spray Tooling
Date: 29 October 1997 15:07
To fellow RPers,
I am about to run an experiment using Arc Spray where by I will use an
aluminium spray onto a SLA part to a thickness of approx. 1 to 2 mm then
back this up with zinc spray . The finished article will hopefully be a
core and cavity for an injection moulded part .
Anticipated problem: -Release agent , what should I use to split the SLA
part out of the Sprayed shell ?
Has any one had experience with this method .
Looking forward to a response
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