Under the action of external exciting force, the grinding medium sometimes disperses and sometimes aggregates. The grinding medium itself rotates in the same direction and the grinding medium group rotates in the same direction. The inner and outer grinding media constantly exchange positions, and two grinding media constantly collide and extrude the shearing material, which causes the material to be crushed and cut. Particles are constantly broken up from large to small. In the process of crushing, the larger particles are first subjected to force and then crushed.
It can be seen from the working principle that the granules composed of plant cell groups, whether composed of large cells or small cell groups, have equal chance of being squeezed and impacted as long as their overall size is equal. That is to say, in the process of crushing medicinal materials, as long as the overall size of large or small cell groups is comparable, the probability of crushing is the same.
Ultra-micro grinder is realized by means of impact, collision, shearing, grinding and dispersion of materials. The traditional crushing method can not be used for superfine crushing, otherwise it will produce granulation effect.
When choosing the crushing method, it must depend on the properties of crushed materials and the required crushing ratio. Especially the physical and chemical properties of crushed materials play a decisive role. The hardness and rupture of materials are the most important, and the impact is very effective for hard and brittle materials.
The method of grinding and shearing is better for Chinese medicinal materials.
In fact, any kind of crushing machine is not a simple crushing mechanism. Generally, two or more crushing mechanisms are combined to crush. For example, the airflow crusher crushes by the impact and collision of materials.
Ultra-micro grinder is impacted and sheared to grind.
The grinding mechanism of vibration mill, stirring mill and ball mill is mainly grinding, impact and shearing, while the working process of colloidal mill is mainly through the strong shearing, friction and impact produced by the relative motion of high-speed rotating grinding body and fixed grinding body.