GB449373A - Improvements in and relating to method and apparatus for processing fiber cakes - Google Patents

Abstract

<PICT:0449373/IV/1> <PICT:0449373/IV/2> <PICT:0449373/IV/3> <PICT:0449373/IV/4> Artificial silk fibre cake is treated in a rotary receptacle, means being provided to cause an endwise flow of liquid through the cake while the rotation causes a transverse flow. The bucket 10, Fig. 1, is upwardly flared to conform to the shape of the cake 12 which fits closely to it, and the inner face 11 of the bucket has a number of curved inclined grooves 13, Figs. 1, 4, forming paths for liquid. The cake rests on an annular plate 16 secured over blocks 17 to the base of the bucket and having a series of passages 21 beneath the cake. The cover plate 22 is secured to the core 26 fitting round the entry pipe 19 and the plate has a p series of discharge apertures 28 above the cake. The diameter of the core 26 is smaller than that of the cake so that a space 27 is left between the two parts. The treating liquid enters by the pipe 19, passes radially outwards through the space 20 between the bucket base and the plate 16 and through the passages 21. It then passes upwards through the cake, some passing to the space 27 from which it is caused to move transversely by the rotary motion. The liquid which emerges from the outside of the cake travels upwards in the grooves 13, and all the liquid is discharged through the passages 28. In a modification, the cover plate forms part of the core and this is held in place by a cap screwed on the top of the bucket wall; the lower plate forms a flange at the end of the feed pipe. In another modification, a sleeve 51, Fig. 7, on the core 36 is arranged inside the cake, and radially disposed holes 53 opening against the inner periphery of the cake, serve as passages for a drying medium when the core 36 is removed. In the further modification shown in Fig. 8, a cup 60 which is made to fit in the spinning bucket so that the filaments are spun directly into it, rests in the processing vessel 62 with suitable spaces round and under it. Inlet passages 71 for the liquid are made in its base and outlet passages 72 in the flange 73 of the core 67. The general direction of the liquid flow is through the cake from the bottom to the top, but relief passages 76 are provided in the wall of the cup 60. Similarly, passages 77 are provided in the wall of the vessel 6 In all forms of the apparatus, vanes 78 may be provided in the flow space 20 at the bottom of the rotary receptacle to assist the flow of liquid.