| 摘要 |
In an extruder for extruding plastic material a filtering assembly (1) for filtering the plastic material in the viscous liquid state has a filtering circuit (2, 22a, 22b, 46, 45, 4) along which the plastic material flows in a first direction of circulation; a filter device (7) defining a first and a second path (21a, 21b, 21a', 21b' ) along which the plastic material flows,- and control elements movable between a first position in which the first path (21a, 21b) is connected to the filtering circuit (2, 22a, 22b, 46, 45, 4); and a second position in which the second path (2Ia', 21b' ) is connected to the filtering circuit (2, 22a, 22b, 46, 45, 4). |
