Investment casting: Usually refers to making patterns in fusible material, covering the surface of the pattern with several layers of refractory materials to make the shell, and then melting the pattern out of the shell to obtain a mold without a parting surface, which is baked at high temperature. After that, the casting scheme can be filled by sand filling. Often called "lost wax casting".
1. High dimensional accuracy and geometric accuracy;
2. High surface roughness;
3. Can cast complex castings, and cast alloys are not restricted.
Disadvantages: complicated procedures and high cost
Application: It is suitable for the production of small parts with complex shapes, high precision requirements, or difficult to perform other processing, such as turbine engine blades.