what do you make moulds out of????
Jon Elson wrote:
I'm not sure the
auto makers use them, either. Â*Either iron or aluminum engine
blocks are usually sand-cast.
I'm sure that at least valve heads (out of aluminium) are cast in steel
moulds. Just the ports and water ways are sand cores. Sand casting is too
expensive for high volume productions.
Nick
--
The lowcost-DRO:
http://www.yadro.de
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