Production and treatment of artificial fibres

摘要

Apparatus for the production or treatment of staple fibres comprises an upwardly inclined trough, means for depositing chips in the lower end of the trough, each chip containing a large number of fibres packed together, and means for directing a stream of liquid upwardly along the trough to separate the fibres of the chips and to sweep the fibres over the edge of the trough. The fibres may then be received in apparatus as described in Specification 750,065 [Group I] such apparatus comprising a receiving tank having an opening the floor thereof, and a perforated belt positioned beneath the opening and positively driven, whereby the mixture of liquid and staple fibres fed into the tank flows on to the belt and the fibres are thereby separated from the liquid. The fibres retained on the belt may be compacted in the form of a blanket, from which further liquid can be expressed by means of a positively driven weighted roller resting on the fibres deposited on the belt. The apparatus may be associated with apparatus for cutting a tow of continuous filaments, e.g. of viscose rayon, into short pieces or chips. The apparatus may form part of a combined apparatus for producing continuous filaments, e.g. of viscose rayon, stretching and washing the formed filaments, cutting them into staple fibres, and opening up and collecting the staple fibres. As shown, a tow of artificial filaments 53 is delivered by a forwarding device 112, and passes between a pair of vertical guide rollers 113, round roller 114, and between positively driven nip rolls 115 positioned close to a cutter 116. Chips of cut fibres fall into the lower end of an upwardly inclined trough 118. A stream of liquid is introduced at high velocity through a nozzle 119 into the lower end of the trough and sweeps the fibres in the chips 117 upwards along the trough and over the lip 121 into a distributing and receiving tank 122. The flow of liquid in trough 118 initiates the separation from each other of the individual fibres in the chips. An opening in the floor of tank 122 allows the slurry of fibres and liquid to be discharged on to a wire mesh belt 161, whereby the fibres are separated from the liquid. Specifications 750,065 [Group I] and 750,067 are also referred to.