Mould repairing method and mould

The invention provides a method for repairing a mold. The method is used for repairing a concave-convex molding surface in the mold with high precision. First, a damaged portion generated on a concavo-convex molding surface 1a in a mold 1 is filled with a repair material 2. Next, an end mill (3) having a smaller diameter than the end mill used when newly manufacturing the mold is used to cut the surface that is raised by the repair material (2), thereby regenerating the concave-convex molded surface (1a). At this time, the rotational vibration of the main shaft to which the end mill (3) is attached can be measured, and the diameter of the end mill (3) can be selected on the basis of the measured rotational vibration. 本发明的模具的修补方法高精度地修补模具中的凹凸状的成形面。首先，利用修补材料2填埋模具1中的在凹凸状的成形面1a产生的损伤部。接着，利用直径比新制作模具时使用的立铣刀小的立铣刀3对因修补材料2而隆起的表面进行切削，由此再生凹凸状的成形面1a。此时，也可以测量安装有立铣刀3的主轴的旋转振动，根据测量出的旋转振动来选择立铣刀3的直径。