D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
D21D 1/30 (2006.01) B02C 7/12 (2006.01)
Patent
CA 2126517
A plate for defibrating or refining wood pulp according to the invention comprises a grinding surface presenting a large number of ribs (9-12) separated by grooves (13-15). The body of the plate (8) is comprised of a first material such as stainless steel or cast iron, ensuring overall mechanical stability of the plate during use. The upper part of the ribs (9-12) is comprised of a layer (16-19) of an abrasion-resistant material made with tungsten carbide granules linked in a metal alloy whose melting and weldability properties are suitable for laser recharging on the body of the plate (8). The ribs (9-12) are recharged successively by being swept by a laser beam and powder spraying nozzle in one or more passes.
Une plaque de défibrage ou de raffinage de pâte à papier selon l'invention comprend une surface de broyage présentant un nombre important de nervures (9-12) séparées par des rainures (13-15). Le corps de plaque (8) est constitué d'un premier matériau tel que l'acier inoxydable ou la fonte, assurant la tenue mécanique générale de la plaque en utilisation. La partie supérieure des nervures (9-12) est constituée d'une couche (16-19) d'un matériau antiabrasion à base de grains de carbure de tungstène liés dans un alliage métallique dont les caractéristiques de fusion et de soudabilité sont appropriées pour un rechargement au laser sur le corps de plaque (8). Les nervures (9-12) sont rechargées successivement par balayage d'un faisceau laser et d'une buse de pulvérisation de poudre, en une ou plusieurs passes.
Maybon Guy
Goudreau Gage Dubuc
Technogenia S.a.
LandOfFree
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