Here's another response I got back from a foundry that 'SPECIALIZES in SMALL RUNS':
> I think there would be something like $800 to $1000 for the pattern, at
> least for both castings. One of the castings is flat backed and it might
> be possible to just mount the pattern cheaply, even the one you've already
> molded into urethane, but the other casting has a parting line that must
> cut strategically through the part for a split pattern. It's not readily
> apparent whether a flat plane parted pattern would fully render the
> geometry and the original casting probably had at least one core if not
> two to create an undercut for the outside diameter of the hinge pin boss.
> The shape could probably be cheated a bit to avoid cores.
>
> If the pattern was $1,000 and the hinge castings were $50 a set, the
> combined cost for each hinge without machining would be $116.00.
>
> If $116 is too much for 15 sets of custom cast ductile iron castings, then
> yes I believe you shouldn't bother anyone with this.
Serious people have
> better things to do.>
> Best Regards,
>
> James
>
Note my bold part. Of the 8 foundries I've contacted, 4 are out of business in less than one year. $1000 for a pattern? Problem is that 'small run' is *still* several hundred parts to a foundry. Their automated machines are not set up to take an original, mold it in sand by hand and get/vent it. Somehow they need a $1000 'pattern' which is a copy of the original cut in half so they can use a squeeze machine to make the cope/drag then assemble the flask. Yes, its quick, but does not lend itself to SMALL runs.
This quote (and the attitude) was just about par for the course... and like I said, the pattern was the biggest part.
If you want to read the 'starting point' of my adventure, and sadly, the ultimate realization of that while these posters sounded negative, it turns out they were 100% completely correct about the industry.
http://www.practicalmachinist.com/vb/ma ... un-152287/