What is investment casting?
Castings weight mostly zero dozens of cattle (i.e. tens of grams to several kilograms), heavy castings casting production is more trouble, but the production of large investment castings weight reached about 800 cattle. The investment casting process is more complex, and not easy to control, use and consumption of the material is more expensive, so it is suitable for the production of complex shape, high precision, or difficult to carry out other processing of small parts, such as turbine engine blades.
The available alloy investment casting production types of carbon steel, alloy steel, heat-resistant alloy, stainless steel, precision alloy, permanent magnet alloy, bearing alloy, copper alloy, Aluminum Alloy, titanium alloy and nodular cast iron. Castings shape are generally more complex castings can be cast out of the hole, the smallest diameter of up to 0.5mm, casting a minimum wall thickness of 0.3mm. in the production can be some of the original by the combination of several parts and components, by changing the structure of parts As a whole, the design of parts directly cast by investment casting, in order to save processing time and the consumption of metal materials, the parts of the structure is more reasonable.
Investment casting is also called "lost wax casting", usually refers to the appearance of fusible materials made in appearance, in the surface coating of refractory material made of several layers of the shell, the shell like melting discharge, thus obtained without parting surface mold, casting after calcination can fill sand side pouring case. Because of extensive pattern the wax material to manufacture, so often referred to as "casting lost wax casting.
