Investment Casting-Impeller

Investment casting is valued for its ability to produce components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys.
Water glass and silica sol investment casting are the two primary investment casting methods nowadays. The main differences are the surface roughness and cost of casting. Silica sol method costs more but has the better surface than water glass method.
The process can be used for both small castings of a few ounces and large castings weighing several hundred pounds.
Investment casting can produce complicated shapes that would be difficult or impossible with other casting methods. It can also produce products with exceptional surface qualities and low tolerances with minimal surface finishing or machining required.
Process: create a mould->produce wax patterns->assemble wax patterns->apply investment materials->dewax->burnout->preheating->pouring->
Divesting
Advantages of investment casting: excellent surface finish/high dimensional accuracy/extremely intricate parts are castable/almost any metal can be cast/no flash or parting lines