Ha ho fihla libese tse ncha, nako ea likepe e tla boela e fokotsehe. Ntle le moo, thepa ea theko ka lebaka la peterole, tlhokomelo le ho robeha le eona e tla fokotseha haholo. The plane blanking die can be formed by electric spark machining, and the precision can be further improved by forming grinding and coordinate grinding. Forming grinding can be carried out using an optical projection curve grinder, or a surface grinder with a microfilming and sanding mechanism, or a precision surface grinding machine with a special shaped grinding tool. Coordinate grinding machines can be used for precise positioning of the mold to ensure precise aperture and hole spacing. It is also possible to grind any curved shape of the punch and the die with a computer numerically controlled (CNC) continuous track coordinate grinding machine. The cavity mold is mostly processed by copy milling, EDM and electrolytic machining. The combination of copy milling and numerical control and the addition of a three-way translational head device in EDM can improve the machining quality of the cavity. Increasing gas-filled electrolysis in electrolytic processing can increase production efficiency.