1, pull the soft metal (such as gold and silver) when the steel mold is enough, the steel mold can have a number of different aperture of the hole.
2,Die hard alloy (tungsten carbide NIB) is usually used in hard alloy die - drawing wire (steel wire), the typical structure of the die for a cylindrical (or slightly tapered) of hard alloy mold core tightly embedded in a circular steel sleeve (case), in the hole of the inner mold core have Bell (bell radius), an entry cone (entrance angel), deformation (work) cone approach angle, diameter (bearing) and outlet angle back relief.
3, steel wire die - drawing non-ferrous metal wire, such as copper, aluminum, also more use and similar wire drawing die, inside the hole shape some differences.
4, pull thin polycrystalline module available to polycrystalline module (diamond), and use natural diamond drawing die.
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