Roll with adjustable deflection and its use

D - Textiles – Paper – 21 – G

Patent

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Details

D21G 1/02 (2006.01) B21B 13/14 (2006.01) B21B 27/05 (2006.01) B21B 27/10 (2006.01) B29C 33/04 (2006.01) F16C 13/00 (2006.01)

Patent

CA 2086007

A roll for the thermal treatment of a web of material (4) in which the web of material (4) is cooled to a defined predetermined temperature in a gap (5) between the roll (1) and a counter-roll (2) is formed as a deflection controlled roll with a rotationally fixed carrier (8) and a rotatable roll jacket (10) which is supported relative to the latter with support elements (11). The roll jacket consists of a plurality of concentric zones, an inner soft zone (16) and a thin outer zone (17) with good thermal conductivity, for example of metal. The roll surface (22), is for example cooled with cooling gas nozzles which are regulated by a temperature sensor (20) so that the roll temperature in the gap (5) adopts a defined temperature value. A roll of this kind, is for example suitable for use in a calender for the smoothing of a paper web or also for the processing or manufacture of a plastic foil.

Un rouleau de traitement thermique d'une bande de matériau (4), au moyen duquel la bande de matériau (4) est refroidie jusqu'à une température prédéterminée définie dans un espace (5) entre le rouleau (1) et un contre-rouleau (2), est conçu comme un rouleau à souplesse variable qui comprend un support (8) non rotatif et une enveloppe (10) rotative soutenue par rapport au support par des éléments de soutien (11). L'enveloppe du rouleau se compose de plusieurs zones concentriques, d'une zone interne souple (16) et d'une zone externe mince (17) ayant une bonne conductivité thermique, par exemple en métal. La surface (22) du rouleau est refroidie par exemple par de becs injecteurs (18) de gaz de refroidissement dont la fonction est régulée au moyen d'un capteur de température (20), de sorte que la température du rouleau dans l'espace (5) prenne une valeur définie. Un tel rouleau est utile par exemple dans une calendre de lissage de bandes de papier ou pour traiter ou produire des feuilles en matière plastique.

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