A vibration mill is a size reduction equipment that applies the process of continuous impaction in carrying out its size reduction function. The grinding container is made up of a tube that is held in a frame that is supported by means of springs which is filled to approximately 80% total volume with porcelain or stainless steel balls.
During milling, the entire body of the mill undergoes a small but frequent vibration that is generated by eccentric motor. The milled particles fall through a screen at the base of the mill.
Advantages of Vibration Mill
- Suitable for hard abrasive grinding stocks
- Unlike tumbling mills, the porcelain in the vibrating mills move only a few millimeters through a complex path, shearing and impacting the materials between them.
- Higher grinding rate in the range of fine particles.
Disadvantages of Vibration Mill
- Not suitable for thermolabile material
REFERENCES
- Brook R.J. (1991). Concise Encyclopedia of Advanced Ceramic Materials. Pergamon Press Plc, UK.
Hiroaki Masuda, Ko Higashitani, and Hideto Yoshida (2007). Powder Technology: Handling and Operations, Process Instrumentation, and Working hazards. CRC Press, Taylor and Francis Group, LLC. - Michael E. Aulton, and Kevin Taylor (2013). Aulton’s Pharmaceutics: The Design and Manufacture of Medicines fourth edition. Elsevier Ltd, NY.
Comments
Wow, I had no idea that there were so many advantages to using vibration mills for milling. Although, I suppose it makes sense since there is a higher grinding rate for particles. That is definitely something to keep in mind if I ever need to do any milling for the projects that I’ve been working on lately.