Lead is a toxic substance that been recorded in most books of all known toxic substances. Ancient books have recorded that using lead pipes to transport drinking water would be dangerous. However, there are still many ways for people to contact with lead, such as the lead in petroleum products, the lead in painting pigment, particularly for some old painting trademarks, the lead content is higher, and had caused many deaths. Therefore, some countries, particularly formulate the environmental standards that the lead content of painting pigments should be controlled within 600PPM. Compared to this, tungsten alloy is non-toxic pollution, and has a high density, high melting point, high hardness, high wear resistance, high ultimate tensile strength, high elongation, good machinability, high impact resistance and crack resistance and some other characteristics, therefore tungsten alloy counterweight can be widely used in various fields.

 

Tungsten alloy block is an ideal material for the production of tungsten alloy counterweight, but using conventional production process is difficult to produce the desired tungsten alloy blocks. However, the injection molding technology is the best preparation technology for manufacturing tungsten alloy blocks. The injection molding technology combines a variety of advantages, such as complex three-dimensional structure, high-density, high hardness, high accuracy and so on. Small volume but high-precision complex parts can also use the injection molding techniques. The relative density of tungsten alloy produced by the injection molding technology can up to 95% -98%. High density means can significantly reduce the size of components. Tungsten alloy block can control the weight distribution, as well as increase the sensitivity of the control mechanism.