Investment casting---one kind of precision casting

Investment casting---one kind of precision casting
Investment casting--- is one kind of precision casting. When use of wax is also known as the "lost wax casting". It is with fusible pattern material in the profiling precision and smoothness high (die),made of initial modulus, it will then be loaded into the module, coated in module with brown material flow which together with refractory material and high temperature adhesive, sprinkle with refractory sand on the coating surface, and then formation to be the shell. Repeated several times like this, forming a multilayer shell. The shell has a heating, melting mould melted out of the shell, the shell is calcined, then you can pouring, solidification after the cleaning process for casting. The casting is the use of other method of integral casting deep, so you don't have to type foil, no parting surface, creating a part of up to 7 - 9 grade and 4 - 5 level finish, can achieve less cutting and non-cutting objective. Disadvantage is the production process more, longer cycle. Suitable for a variety of small parts, alloy, thin-walled parts and complex castings production.