What is investment casting

Mold casting, also known as "lost wax casting", usually refers to the mold made of fusible material, the mold surface covered with a number of layers of refractory material made of shell, and then the mold melted out of the shell, so as to obtain the casting of the surface of the casting of the surface without parting, high temperature baking can be filled with sand pouring casting program. Because the mold is widely used wax material to manufacture, so often will melt mold casting called "lost wax casting".　Alloys that can be produced by investment casting include carbon steel, alloy steel, heat-resistant alloys, stainless steel, precision alloys, permanent magnet alloys, bearing alloys, copper alloys, aluminum alloys, titanium alloys, and ductile cast iron.　The shape of the castings are generally more complex, castings can be cast on the minimum diameter of the hole up to 0.5mm, castings of the minimum wall thickness of 0.3mm. in the production of some of the original combination of several parts of the parts, by changing the structure of the parts, designed to become a whole part and cast directly by the casting of the casting of the casting of the casting of the melt mold, in order to save the machining time and consumption of metal materials, so that the parts structure is more reasonable.　Most of the weight of the castings for the zero point tens of cattle (that is, dozens of grams to a few kilograms), too heavy castings with the casting method is more troublesome, but the current production of large castings of the weight of the casting of the molten mold has been up to 800 cattle or so.　Investment casting process is more complex, and not easy to control, use and consumption of materials more expensive, so it is suitable for the production of complex shape, high precision requirements, or very difficult to carry out other processing of small parts, such as turbine engine blades and so on.