| 摘要 |
The invention relates to a filter device for polymer melts, having a filter screen (1) through which the polymer melt to be cleaned is conducted, wherein the filter device has at least one scraper element (2) which slides by way of a scraping edge (3) over the inflow-side surface (4) of the filter screen (1) and/or bears by way of its end region close to the scraping edge (3) against the surface (4) and which, during the course of its movement over the surface (4), lifts and/or scrapes off the contaminants (6) adhering to the surface (4) and situated in front of the screen holes (5). It is provided according to the invention that the scraping edge (3), at least in that end region thereof which is in front in the direction of movement (16), has a rounding (7), the radius (R) of which amounts to less than 90%, preferably less than 50%, in particular less than 20%, of the maximum diameter or maximum opening width of the screen holes (5). |
