Granulating technology was applied and developed in proprietary Chinese medicine processing in ancient China. Now it
is widely used in pharmaceutical industry, preparation of powder metallurgy materials and alloy, metallurgy, ceramic and
fertilizer industries. In recent years in the production of diamond tools, in order to improve the production efficiency and
quality of cold pressing head, to achieve automated production, granulating process was developed and applied.
Granulating process was applied and developed in powder metallurgy and diamond tools industry, mainly due to it has the
following advantages:
1, Powder liquidity was improved and enhanced. Powder after granulating, the particle diameter is larger than the original
powder particle size, the number of particles around each particle can be exposed reduced, so its adhesion, cohesion and
friction greatly reduced, so as to improve and enhance liquidity of the particles.
2, Reduce the segregation and accumulation of powder and diamond, more uniform distribution, improve the performance
of the products. In granulating process, the first step is to mix powder, diamond and binder. And then add solvent, wetting
mixing and granulating again, every diamond is packaged by powder, and then cold press forming and sintering. So as to
prevent the accumulation of diamond and segregation of powder, and improve the sintering performance, uniformity and
stability of the products.
3, Improved the precision of size and weight of the products. Due to the liquidity increasing of mixed powder, the
powder products loading and cold pressing ore uniformly, cold pressing products geometry size and the weight precision
improved. This is better for the pressing of special-shaped products, sandwich cutting head and laser welding saw blade.
4, Reduce the loss of cold pressing mold. Because of good liquidity in the powder, diamond powder were packaged,
distribution is more homogeneous, so the cold rolls loss is reduced, die life increased by more than 50%.
5, Improved the efficiency and economy of cold pressing process, create conditions for realizing cold press automation
production. Due to the improvement of powder liquidity and die life, make ordinary weighing type automatic cold press
machine is more efficient, making it possible to volumetric automatic cold press machine adopts.
6, Reduce the harm to workers of powder pollution. By use of granulating technology fines is reduced, the grain is not
easy to fracture, convenient to storage and transportation, reduce dust and pollution greatly.
