Usually refers to a variety of molds for drawing metal wires, as well as wire drawing dies for drawing optical fibers. The center of all wire drawing dies has a certain shape

of holes, round, square, octagonal or other special shapes. As the metal is pulled through the die hole, the size becomes smaller and even the shape changes. When a soft 

metal (such as gold and silver) is pulled, the steel mold is sufficient, and the steel mold can have a plurality of holes of different pore sizes. The drawn steel wire (steel wire)

is generally made of Tungsten carbide nib. The typical structure of the mold is a cylindrical (or slightly tapered) cemented carbide core closely embedded in a round case; 

drawing colored metal wires, such as copper, aluminum, and more similar wire drawing die with wire mold, the shape of the inner hole is somewhat different, the thin wire 

can be used to polycrystalline mold (artificial diamond), and natural Diamond drawing die.

In order to improve the production competitiveness, the metal products industry pays more and more attention to the quality of the drawing die and the improvement of the

manufacturing process. Starting from the improvement of the life of the wire drawing die, the material, structure, manufacturing process, manufacturing equipment and testing

instruments of the wire drawing die are systematically implemented. The research has developed a new composite drawing die, a new drawing die material, a new surface 

coating technology, and a new hole design method for the wire drawing die, which has promoted the development of the world's wire drawing production.

CVD (Chemical Vapor Deposition) coated wire drawing die is a new technology developed recently. The main method is to coat the diamond film on the carbide die. The diamond

film is a pure diamond polycrystal, which has the advantages of single crystal diamond smoothness, temperature resistance, wear resistance of polycrystalline diamond and low 

price, and is very good in replacing the rare natural diamond to prepare the drawing die tool. The effect, its widespread use will bring new vitality to the wire drawing industry.

The hole shape optimization of the inner hole of the drawing die can reduce the wear rate of the wire drawing die and prolong the service life of the wire drawing die. Therefore, 

the hole type optimization of the wire drawing die is performed, the manufacturing precision of the wire drawing die is improved, the production cost can be saved, and the production

efficiency is greatly improved.