Helical roll crusher for reducing waste

摘要

The roll crusher comprises at least one crushing roll mounted for rotation in a casing open at least partly at top and bottom. The crushing roll has a peripheral helix (4). The helix whoris are formed with recesses, and thus with rippers. The recesses are disposed offset on the periphery in consective whoris. A channel-like row of recesses is thus formed and extends not parallel to the roll axis (5) but helically around. Two crushing rolls with or without recesses can co-operatie with a grating formed with crusher strips and crusher webs. The crushing rolls can bary as regards speed and/or the pitch and/or number of helices (4).