Contour cutting in the mold processing, the main tool used by the need to force uniform under processing conditions. For example roughing, general tool great force, and therefore able to control the cutting contour cutting depth way, the tool force within a restricted range. Further, when the processing or finishing, if the processing site is too steep, too, need to extend the blade case lengthened, due to long machining tool when deflection is too large, often need to use high-cutting way, to reduce tool force. The most popular high-speed cutting machine, cutting the user is high.