1. The definition of wire drawing die
　　 usually refers to various dies for drawing metal wires, as well as drawing dies for drawing optical fibers. All wire drawing dies have a hole in the center of a certain shape, round, square, octagonal or other special shapes. When the metal is pulled through the die hole, the size becomes smaller and even the shape changes.
Second, the type of drawing die
　　　1. Steel mold-the steel mold is sufficient when drawing soft metals (such as gold and silver), and the steel mold can have multiple holes with different diameters.
2. Tungsten carbide die-drawn steel wire (steel wire) generally uses a tungsten carbide die (Tungsten carbide nib), the typical structure of this type of die is a cylindrical (or slightly tapered) cemented carbide core tightly The ground is embedded in a circular steel case. The inner hole of the mold core has a bell radius, an entrance cone, an approach angle, a bearing, and Exit angle (back relief).
　　　 3. Steel wire dies-for drawing non-ferrous metal wires, such as copper and aluminum, wire drawing dies similar to steel wire dies are often used, with some differences in the shape of the inner holes.
　　　4. Polycrystalline molds-Polycrystalline molds (man-made diamonds) can be used to draw thin wires, as well as wire drawing dies that use natural diamonds.