The mold is used for drawing metal wire drawing die, its importance is ineffable. In the drawing die, there are three kinds of steel mould, hard alloy steel mould and diamond wire drawing die. The inner hole is the most important working area of drawing die. According to the structure and working property, the inner hole can be divided into five parts, the inlet area, the lubricating area, the working area, the size adjustment area and the export processing zone.

If it is in accordance with the "smooth transition" theory, the transition is located at the junction of the drawing die must be smaller. After the entrance, wire into the wire drawing die, and then through the drawing die of traction, wire will in the interval between the intense friction, and then ground into a fine line, and then from the export of piercing. Choosing the proper drawing die is also very important. First, choose a suitable hole inlet angle, in order to wire drawing die can better work, inappropriate angle will lead wire will not be able to penetrate. There will be wear and tear, drawing die is no exception, the first is the issue of wear and tear. The use of the mold must inevitably be subject to wear, but can be used to reduce the wear and tear of lubricating oil.

Corrosion in the use of the mold is also the most common problem. In the process of drawing die, there will be a chemical reaction between some atoms and wire drawing die, so that the new material can be produced, and the material is easy to fall off. In addition to the chemical reaction between the drawing die and the material of the wire, the impurities in the lubricating oil and the drawing die are easy to react to form corrosion. There is also a problem is a cause of wear and tear of fine particles. Although the fine particles of the particles is very small, but many a little makes a mickle, small particles in mold can produce big energy, thus speeding up the wear of the wire drawing die.