It may be the way to go - some extra expense I assume,

but if cut down on

machining that would be good.
George (down under)

George, As everyone else has said Great Job! The styrofoam process that
folks are talking about is used exactly to cut down on the machining

process.

The parts come out looking very much like the parts from a permanent

mold die casting.

You have already made a VERY NICE looking, probably very useable part.

Good

patterns. The advantage of the lost styrofoam process is that you dont

need

to worry as much about the sand or other mold meterial collapseing and

the

parts can be very close to "final" dimensions while still allowing
clean-up machining. With the updates you have in mind the cost of doing
the lost styro. probably wouldn't be worth the cost. You can't recover
much machining cost on less than 100 parts.
Now that the correct numbers are plugged into the guys cnc you are
probably best to stay with your current mold and do your improvements.
Excellent job way ot go. Bill Jepson

Thank you Bill - you words are much appreciated !
George (down under)

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.