ES289878A1 - Apparatus for the wet treatment of viscose yarns - Google Patents

Abstract

A roller, on which synthetic filaments are treated, in a continuous wet-spinning process, with a plurality of liquids, is subdivided, transversely of the axis, into a plurality of processing zones, each zone being associated with an inner chamber in the roller, and orifices being formed in the outer surface of the roller at each end of the zone, by means of which, each processing liquid is allowed to flow from its zone on the roller surface into the related inner chamber. Means are provided for bringing each processing liquid separately from the chambers to an outlet on the roller. A filament 12 (Fig. 1, not shown), is advanced helically by means of skew roller 11 along a processing roller 10 consisting of outer shell 13 and central core 14. Walls 15A-15f, and end walls 16, 161 (Fig. 2), divide the roller into processing zones 20-26 and associated chambers 37. As the filament passes along the roller it is treated in each zone with a liquid, and finally dried in zone 27. The treating liquids are supplied to the processing zones by ducts (not shown). A portion of the liquid applied to, e.g. zone 22 falls to a corresponding zone of trough 30, and is removed by pipe 56. The remainder of the liquid flows towards the ends of zone 22 and is sucked through orifices 31, 32 (Fig. 3, not shown), into annular chambers 33, 34 connected to inner chamber 37. Partition walls 38, 39 prevent zone 22 liquid from flowing into chambers 40, 41 associated with adjacent zones 21, 23. Inner chamber 37 is divided by means of walls 42-45 (Fig. 4, not shown), into sections. As the roller rotates, liquid in each section is lifted and then falls through orifices 46, 47, 48 in walls 42, 43, 44 to be collected in the section associated with wall 45, which contains no orifice. Further rotation of the roller causes the collected liquid to enter opening 49 in central core 14, which is divided into sectors 62-66. Similarly, liquids from each of the other processing zones are separately collected in one of the sectors of the central core. Two or more liquids, however, may be collected in the same sector if their separate recovery is not required. The liquids pass along the longitudinal sectors of the central core 14 and are eventually discharged through openings, e.g. 52 (Fig. 2), to fall into compartments, e.g. 53, in cylindrical container 61 for return to the roller. The liquids are moved by suction applied at 55 to the container 61. Zone 27 on the roller is a drying zone. Hot gas is blown through duct 58 on to the surface of the roller, which is porous at this point, and is exhausted through duct 60. A complete spinning plant may comprise a plurality of rollers 10, each associated with a plurality of advancing rollers 11. In one embodiment, wherein the apparatus is applied to the viscose spinning process, the processing zones on the roller correspond to fixing, desulphurization, bleaching, finishing and washing treatments.