Device for the continuous filtration of material blends

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/68 (2006.01) B01D 33/06 (2006.01) B01D 33/073 (2006.01) B01D 33/11 (2006.01) B01D 33/46 (2006.01) B29B 13/10 (2006.01)

Patent

CA 2490132

The invention relates to a device for the continuous filtration of material blends, in particular for separating impurities from molten plastic. Said device comprises a hollow cylindrical filter (2) in a housing (1), an inner chamber located inside the filter (2), an annular chamber (22) that is delimited by the exterior face of the filter (2) and an inner wall of the housing (1) and a cleaning device (23, 24) for removing the impurities that have been retained by the filter (2). To facilitate the most rapid removal possible of the separated residues from the filter surface, the filter (2) is mounted in the housing (1) so that it can rotate about an axis (3) and the cleaning device (23, 24) contains at least one scraper (23, 28, 30) for removing the impurities that have been retained by the filter (11) in a radial direction.

L'invention concerne un système servant à filtrer en continu des mélanges de matière, en particulier pour éliminer des impuretés contenues dans des charges de matière plastique fondue. Ce système comprend un filtre (2) creux cylindrique disposé dans un boîtier (1), une chambre intérieure (15) située à l'intérieur du filtre (2), une chambre annulaire (22) délimitée par la face extérieure du filtre (2) et une paroi intérieure du boîtier (1), ainsi qu'un dispositif de nettoyage (23, 24) servant à éliminer les impuretés retenues par le filtre (2). Selon l'invention, pour que la surface du filtre puisse être débarrassée le plus rapidement possible des résidus de filtration, le filtre (2) est monté rotatif autour d'un axe (3) à l'intérieur du boîtier (1) et le dispositif de nettoyage (23, 24) comprend au moins un racloir (23, 28, 30) servant à éliminer les impuretés retenues par le filtre (11) dans le sens radial.

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