Originally Posted by --colin-- Parts like this are often investment cast. A wax model of the part is either molded or machined. Sprues and runners are added and then this wax part is dipped repeatedly into a ceramic slurry until a suitable thickness is established. The ceramic mold with the wax inner piece is baked to melt and burn out the wax residue. The final mold is then cast with molten metal. After cooling, the ceramic mold is broken apart leaving the metal casting.
The advantages are not needing to remove the core after the casting operation.
--Colin-- |
Interesting process... Everything I have read seems to indicate that the wax (or foam for that matter) is vaporized by the actual pouring of the metal. But your process is a little different. So it can be done both ways? My concern with your process is the ceramic slurry. Seems to be an extra step. Whereas, just burrying the wax or foam into sand and then pouring the metal right in. But I think your process probably produces a better finish. Can you possibly point me to some web sites that sell this wax and ceramic slurry stuff? Thanks!