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In contrast to conventional Planetary Mills, the rotational speed of the grinding bowls and supporting disk can be configured separately in the PULVERISETTE 4 classic line. Advantage to you: A single mill for mechanical activating and alloying and material research providing optimum grinding conditions suited to the respective material to be ground and the size of the grinding bowls and balls! For results that cannot be achieved with other Ball Mills.
Method of operation:
With standard planetary ball mills the grinding bowls are rotating and mounted eccentrically on a rotating support disc. The rotational speed of the supporting disc can be selected at will; the grinding bowl rotates at a fixed transmission ratio. Due to the overlapping of grinding bowls and supporting disc, the material to be ground and the grinding balls execute movements and trajectories in the grinding bowl, which are defined by the transmission ratio.
With the PULVERISETTE 4 classic line vario-planetary mill the rotational speeds of grinding bowls and supporting disc can be adjusted completely independently of each other. By varying the transmission ratio it is possible to control the movements and trajectories of the grinding balls at will so that the balls strike the inner wall of the bowl vertically (high impact energy), approach each other tangentially (high friction) or just roll down the inner wall of the bowl (centrifugal mills). All intermediate levels and combinations of frictional and impact pressures can be set as required.
Features of performance:
- Programming of the grinding parameters
- Real-time display of the speeds to monitor the grinding process
- Reversing option (direction of rotation reversed periodically) to improve the grinding results
- Emulation of various ball mills
- Variably adjustable pressure on sample (friction and/or impact)
- feed particle size < 10 mm, final fineness up to 0.1 µm
- Ease of cleaning
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