Investment casting, which is also known as "lost wax investment casting " , usually refers to a foundry program thatthe appearance of fusible material and the appearance of refractorysurface coating made of several layers of shell, and then dischargedshell look like melting, resulting in the parting line-free mold,through calcinations to fill sand casting.
The alloy types which can be produced by investment castingas follows: carbon steel, alloy steel, heat-resistant alloys, stainlesssteel, precision alloy, permanent magnet alloy, bearing alloys, copperalloys, aluminum, titanium, and iron and so on.
Investment castings generally have more complex shapes, and lost waxinvestment castings can be cast out of the smallest whole diameter0.5mm, minimum wall thickness of casting 0.3mm. By changing thestructures of elements you can design a whole new element and make itthrough investment casting. This method will save the processing timeand reduce the abrasion of metal material.
The weight of investment castings is mostly tens of grams to severalkilograms, and too heavy castings use investment casting is moretrouble. The large production of investment casting's weight has reachedabout 800 cattle.
Investment casting process is complex and difficultto control, and the consumed materials are expensive. So it applies tothe production of complex shape, high precision, or difficult for otherprocessing of small parts, such as turbine engine blades.