The task of laboratories or development centres is usually the manufacture of small amounts of product samples for tests with the aim of defining an industrial manufacturing process. The laboratory-scale systems used must offer process reproducibility and the possibility of scaling up at a later date to production-scale equipment. Because new products whose grinding properties cannot always be predicted in advance are constantly being developed, maximum flexibility is a prerequisite.
This is where so-called multi-processing systems have established themselves as veritable all-rounders: it takes only a few minutes to exchange the following modules:
- Fluidised bed opposed jet mill
- Ultrafine classifier
- Classifier mill
- Spiral jet mill
- Fine impact mill
This concept revolves around the fact that the installation frame, the feed metering unit, the valves for bearing rinsing air and grinding air, the drive, the product collection filter, the fan, the electrics and the control unit are common to all processes. The latest development of Hosokawa Alpine is the extension of this combi-system by a fine impact mill which can be equipped with the standard variety of grinding elements (pin discs, plate beater units, grinding tracks, sieve grates, etc.).
A newly developed drive, controlled by a frequency converter with different sets of parameters permits (in spite of the very different design, power and speed) installation of both the grinding rotor of the fine impact mill and also of the deflector classifying wheel.