peter
Titanium
- Joined
- Mar 20, 2001
- Location
- New England
I have had quite a few castings poured over the years. The largest was the legs for a lathe. In most cases, I have prepared an origional part and use that as a pattern. My problem has been how to handle hollow parts. In simple cases, the foundry has been able to use some stock cylinders. I have been stuck dead on how to make large or complex core boxes. I have made a pattern for the outside profil of a large asymetrical cylindrical cast muffler (one piece). The closest thing would be to picture an elongated socker ball. I need to make a core box, that is a hollow box, split down the centerline, with a cavity slightly smaller than the outside shape of the muffler. I dont want to try and chissel or machine a solid wood box. So once Again, I am looking for a trick or shortcut. Might it be possable to use my outside pattern and some spray foam or similar porduct to create a cavity. Then split the halves and buildup the needed 1/4 inch thichness? Can the foundry work with a foam core box? Or some other modern miracle matterial thats easy to hand carve?
as always, thankyou all
[ 09-20-2006, 05:28 PM: Message edited by: peter ]
as always, thankyou all
[ 09-20-2006, 05:28 PM: Message edited by: peter ]