First of all, we should understand the purpose of comminution, understand the principle of comminuter, and choose a good comminuter according to the characteristics of the crushed material, such as hammer mill, whose principle is that the material is crushed by impact and hammering, and the powder after comminution is finer; the other is universal comminuter, whose principle is that the material is crushed by impact and tear grinding, and the sieve mesh of non-directional specifications is changed. It is suitable for crushing highly viscous extracts, crystalline materials, such as beeswax, donkey-hide gum and borneol. Then the appropriate grinding degree is controlled according to the purpose of application and the dosage form to be prepared.
In order to improve the crushing efficiency. Maintain crushing machinery and reduce energy consumption. Before crushing operation, pay attention to the disposal of crushed materials before stopping: if according to the relevant rules, stop net processing; medicinal materials must first be dry to a certain level, control moisture, etc. Magnets should be installed at the entrance of the crusher to absorb the iron scraps and wires in the powder, so as to prevent metal from mixing into the crusher. In order to avoid accidents, the mill must start without load until the machine is fully started and running normally. Take the medicine again. When the machine stops, all the materials in the standby machine should be discharged for about 2 - 3 minutes before the power supply is cut off.
Before comminution and in the process of comminution, we should pay attention to timely screening in order to avoid excessive comminution of local drugs. It can also improve work efficiency; in the crushing process, attention should be paid to reducing the flying of fine powder and avoiding foreign body incorporation. Especially when crushing poisons or irritating drugs, we should pay attention to protection and safe operation; plant medicines must be crushed and applied completely, and parts (veins, fibers, etc.) which are more difficult to crush should not be thrown away at will, so as to avoid the loss of effective ingredients of drugs, so that the content of drugs is relatively reduced or increased.
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