Silica sol investment casting technology is more and more widely used,
and its advantages have been recognized. At the same time, it also needs
to be improved. Because the raw and auxiliary materials and machine
operating conditions used in various factories are different, the
process parameters are also changeable. How to ensure the yield of
castings is an eternal topic.
1. Technical requirements of binder silica sol for precision casting
There is no national standard for silica sol for investment casting,
only the technical requirements of aviation industry standard
hb5346-1986 silica sol for investment casting. Silica sol is a
high-quality silica sol water-based binder for investment casting, which
is produced for all layers (surface layer s830 and back layer s1430).
Silica sol is easy to prepare into high-quality coating with high powder
liquid ratio, and the coating is stable.