| 摘要 |
The invention relates to a device (1) for preparing materials (2), comprising a frame (3), a tool holder (4) that rotates about a first rotation axis (5), and a driving means (6) for driving said tool holder (4), each tool (7) that is held by the tool holder (4) comprising an end part (8) distal from the tool holder for shredding the refuse (2). At least one of these tools (7) can move relative to the tool holder (4) between an extended position (S), where the distance (D) between the end part (8) and the tool holder (4) is at its maximum (DM), and a retracted position where the distance (D) is at its minimum (Dm), this distance (D) varying according to the angular position (a) of rotation of the tool holder (4) with regard to the frame (3), and the device comprises control means (11) for varying said maximum distance (DM).
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