Method and apparatus of defibrating a fibre-containing material

D - Textiles – Paper – 21 – B

Patent

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Details

D21B 1/14 (2006.01) B02C 7/12 (2006.01) B02C 13/20 (2006.01) D21B 1/30 (2006.01) D21D 1/30 (2006.01) D21D 1/36 (2006.01)

Patent

CA 2276073

The present invention relates to a method for defibrating fibre-containing material in a device operating with the pin mill principle. The device comprises a housing and in it a first rotor (11) equipped with collision surfaces; a second rotor (12) concentric with the first rotor and equipped with collision surfaces, the second rotor being arranged to rotate to opposite direction in relation to the first rotor; or a stator concentric with the first rotor and equipped with collision surfaces. Further, the device comprises a feed orifice (14) in the housing and opening to the centre of the rotors (11, 12) or the rotor and stator, and a discharge orifice (15) on the housing wall and opening to the periphery of the outermost rotor or stator. The fibre-containing material is led from the feed orifice (14) to the housing and made to flow together with air or liquid generating a suspension through the collision surfaces of the nested rotors (11, 12) or the nested rotor and stator to the discharge orifice (15) and further as a discharge flow out of the housing. The invention also relates to a device for carrying out the method.

L'invention concerne un procédé servant à défibrer un matériau contenant des fibres dans un dispositif fonctionnant selon le principe d'un malaxeur à broches périphériques. Ce dispositif comprend un carter contenant un premier rotor (11) pourvu de surfaces de collision; un deuxième rotor (12) concentrique par rapport au premier rotor, pourvu de surfaces de collision et conçu pour tourner dans un sens opposé par rapport au premier rotor ou un stator concentrique par rapport au premier rotor et pourvu de surfaces de collision. Ce dispositif comprend, de plus, un orifice d'alimentation (14) situé dans le carter et s'ouvrant sur le centre des rotors (11, 12) ou du rotor et du stator, ainsi qu'un orifice d'évacuation (15) situé dans la paroi du carter et s'ouvrant sur la circonférence du stator ou du rotor situé le plus à l'extérieur. On introduit le matériau contenant des fibres dans l'orifice d'alimentation (14) vers le carter et on le fait s'écouler avec de l'air ou du liquide, ce qui génère une suspension à travers les surfaces de collision des rotors emboîtés (11, 12) ou du rotor et du stator emboîtés vers l'orifice d'évacuation (15) à travers lequel ladite suspension est évacuée du carter. L'invention concerne également le dispositif servant à mettre ce procédé en application.

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