coconut fibres

Rotor with V-cutting edges and fixed knives made of hardmetal tungsten carbide should be used for hard organic materials like the coconut fibers. This rotor has a much better durability compared to the standard-rotor with V-cutting edges.

During feeding of sample, fine dust of sample can escape the standard funnel for long and bulk solids. To prevent dust exploration, we placed a tube of a vacuum cleaner next to the funnels opening. Also the optional protected funnel with sample pusher can be used to minimize dust exploration.

After 40 seconds, all coconut fibers have been ground. We found a few particles with a length up to 1 cm after grinding (because sample can pass the sieve cassette longitudinal).

For a grinding of higher amounts (500g as desired), the collecting vessel with 10 L volume should be chosen.

Also a sieve cassette with 0,25 mm trapezoidal perforation can be used for grinding. In this case, it took 140 seconds until all sample (150 g) got ground.

Like in the previous trial, fine dust escapes the standard funnel and has to be removed with a vacuum cleaner.

After grinding, a bit of sample use to stick to the lid of the machine – this sticking appears to be caused by moisture which escaped the sample after warming inside of the grinding chamber. Residues can be removed by vacuuming with brush.

We are guessing that a grinding of up to 500 g should still be possible.

Sample has been ground way finer, compared to result 3. We found a lot of powder fine sample and a few longer fibers with a maximum length of ~ 3 mm.