waste (rests of car scrap yard)

Original sample is too big for a direct feeding to the Universal Cutting Mill PULVERISETTE 19. For this, we used the Power Cutting Mill PULVERISETTE 25 for a pre cutting of sample. Also a manual pre cutting (e.g. with a band saw) might be possible.

The sample contains several screws and bigger parts of cast iron, a feeding of such particles can cause damages to the knives and housing of the machine. We separated those and gave it to the ground sample in a separate plastic bag.

If such particles might be fed accidently, we recommend choosing a rotor with indexable knives. Those knives can be rotated 3 times before they need to be replaced.

All sample got pre ground successfully within 4 minutes. Afterwards, only a few particles use to be left loose on top of the sieve cassette and can be removed easily by vacuuming with a soft brush.

Also a grinding of higher amounts of sample use to be possible.

Sample got pre ground in previous report to < 1 cm start size.

Now the sample will be comminuted to the desired size with the Universal Cutting Mill PULVERISETTE 19. Also the optional sample exhauster system with cyclone separator will be used to chill the sample inside the grinding chamber additionally (with its active air flow of ~ 2800 L/min).

Some thermoplastic samples use to have very low melting points and might start melting in front of the knives. The unknown mixture of different materials (mainly plastics, but also thin metal pieces and yarn) might contain such low melting sample.

In this case, the complete fed sample got ground within 150 minutes. Only a few electrostatic charged particles are attached to the grinding chamber and can be removed quickly by vacuuming with a soft brush.

All openings of the sieve cassette remains free, a grinding of higher amounts of sample should be possible without problems. Probably also smaller sieve cassettes of e.g. 1,5 mm or 1,0 mm trapezoidal perforation can be used for grinding too.