Method for the manufacture of a roll for use in the...

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 3/08 (2006.01) C23C 4/18 (2006.01)

Patent

CA 2208161

The invention concerns a method for the manufacture of a roll for use in the production of paper, in which method the roll is coated by means of thermal spraying. The method comprises the following steps: onto the coating (12) of the roll which has been produced by means of thermal spraying, a sealing-agent solution is spread to seal the pores (13) in the coating (12), the sealing-agent solution is allowed to be absorbed into the pores (13) in the coating (12), the roll is heated in order to eliminate the water from the sealing-agent solution, on elimination of the water, the sealing-agent solution crystallizes in the pores (13) in the coating (12), and the roll is allowed to cool. Further, the invention concerns a roll for use in the production of paper, which roll comprises a frame (10) and a roll coating (12), which coating (12) has been produced by means of thermal spraying. The coating (12) has been sealed by means of crystals formed out of a sealing-agent solution on elimination of water. Also, the invention concerns a coating for a roll for use in the production of paper, which coating (12) has been produced by means of thermal spraying, and in which coating (12) there are pores (13). In order to seal (12) the coating, a sealing agent (16) has been crystallized in the pores (13) in the coating (12).

L'invention concerne un procédé de fabrication d'un rouleau destiné à être utilisé dans la production de papier et qui est revêtu, au cours de ce procédé, par pulvérisation thermique. Le procédé comprend les étapes suivantes: sur le revêtement (12) qui a été appliqué sur le rouleau par pulvérisation thermique, une solution d'agent de fermeture est pulvérisée afin de colmater les pores (13) du revêtement (12), puis est absorbée par les pores (13); le rouleau est chauffé afin d'éliminer l'eau de la solution d'agent de fermeture, et, au cours de cette élimination de l'eau, la solution se cristallise dans les pores (13) du revêtement (12), et on laisse refroidir le rouleau. L'invention concerne également un rouleau destiné à être utilisé dans la production de papier et qui comprend une ossature (10) et un revêtement (12), ce dernier ayant été formé par pulvérisation thermique. Les pores du revêtement (12) ont été colmatés au moyen de cristaux formés à partir d'une solution d'agent de fermeture, lors de l'élimination de l'eau. L'invention concerne en outre un revêtement appliqué sur un rouleau destiné à être utilisé dans la production de papier, ce revêtement ayant été formé par pulvérisation thermique et comprenant des pores (13). Afin de colmater les pores du revêtement (12), un agent de fermeture (16) a été cristallisé dans lesdits pores (13).

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