Heated rolls with enclosure

D - Textiles – Paper – 01 – D

Patent

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Details

D01D 10/02 (2006.01) D02J 13/00 (2006.01)

Patent

CA 2304178

A baffle structure that includes a generally cylindrical portion and at least one generally linear portion is associated with each roll in a yarn processing. The generally cylindrical portion is spaced a predetermined clearance distance from the surface of the roll with which it is associated to define a generally curved channel about the roll. The generally linear portion of each baffle structure extends toward the other roll, with the generally linear portions overlapping each other to define a substantially linear channel between adjacent upstream and the downstream rolls. The generally linear portion extending from the cylindrical portion of the upstream roll toward the downstream roll has an edge thereon. The edge is disposed within a predetermined close distance of the surface of the upstream roll such that the edge lies within the boundary layer of air able to be generated about the upstream roll. The generally curved channels and the substantially linear channel cooperating to define a pathway that substantially encloses the warp array of yarns as the same is moved over and between the rolls. In operation, a substantially uniform transverse temperature is maintained across the pathway at each point therealong, and at least a portion of the heated air about the upstream roll is stripped therefrom as yarn is conveyed from the upstream to the downstream roll.

L'invention concerne une structure déflectrice qui comprend une partie sensiblement cylindrique et au moins une partie sensiblement linéaire, et qui est montée contre chacun des galets d'une installation de traitement des fils. La partie sensiblement cylindrique, montée à une distance prédéterminée du galet qui lui est associé, définit autour de ce galet un chemin sensiblement courbe. la partie sensiblement linéaire de chaque structure déflectrice se prolonge vers l'autre galet, les parties sensiblement linéaires se chevauchant pour définir un chemin sensiblement droit entre des galets adjacents situés en amont et en aval l'un de l'autre. La partie droite qui prolonge la partie cylindrique autour du galet situé en amont vers le galet situé en aval présente un bord. Ce bord se trouve à une courte distance déterminée de la surface du galet d'amont, ceci de sorte qu'il se trouve dans la couche limite d'air qui peut se concentrer autour dudit galet. Pris ensemble, les chemins sensiblement incurvés et la partie sensiblement linéaire définissent un chemin qui recouvre dans une large mesure la chaîne de fils qui passe sur et entre les galets. Pendant la marche, une température transversale sensiblement uniforme est maintenue tout au long du chemin et une partie au moins de l'air chauffé autour du galet d'amont est évacuée lorsque le fil passe de ce galet au galet d'aval.

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