are two types of investment casting workshops, one
type is using the water glass as the main material,
another is using the silica sol.
The silica sol
investment castings have better dimensions and
surface quality, but just too expensive than water
glass. It is normally two times of the cost of water
sol investment casting process uses silica sol
zircon sand as the molding material, which can stand
temperature up to 2000 degree. This molding material
is very expensive.
Silica sol investment castings have very good
surface quality, very smooth, very less surface and
The followings are photos for the steel castings
made by this process.