GB686339A - Improved process and device for the liquid treatment of thread or yarn in tube systems - Google Patents

Abstract

Artificial thread or yarn is subjected to the action of various treating liquids in succession by passing it through a separate tube system with each of the treating liquids and separating it from liquid after leaving each tube system. At the beginning of the operation, a feeding-in liquid, e.g. water, is led from the outlet of each tube system over a guide-way to the inlet of the subsequent tube system in order that the thread or yarn may be passed through the entire treating apparatus, and when this has been accomplished the guideways are wholly or partly displaced so that liquid emerging from the outlet of each tube system is prevented from flowing into the next tube system. The treating liquids are then caused to flow through the separate tube systems and intermingling is avoided. If desired, all the guide-ways may be displaced simultaneously. The process may be used in the aftertreatment of freshly spun viscose yarn and may include hot water, dilute acid, desulphuring, and bleaching treatments. The process may also be used in the treatment of threads from cuprammonium-cellulose solutions, or threads of cellulose acetate, casein, rubber, cotton, or wool. As shown in Fig. 2, freshly spun viscose thread is after-treated with liquids while travelling along tubes 12-22. Tubes 12, 14, 16, 18, 20 and 22, are fed from supply conduits 23-28, and tubes 13, 15, 17, 19 and 21, are fed from conduits 29-33. Each <PICT:0686339/IV (a)/1> <PICT:0686339/IV (a)/2> <PICT:0686339/IV (a)/3> <PICT:0686339/IV (a)/4> of the tubes is associated with a deflector trough housing at each end. As shown in Fig. 5, thread is led over a vitreous guide 43 to a temporary collecting device. Guide 43 is supplied with water from pipe 45. The thread is then cut and the water flowing over guide 43 washes the thread over movable trough 48 and stationary trough 49 to the flared funnel mouth 50 leading to tube 12. The thread is carried through tube 12 by the water issuing from nozzle 77 and is discharged into a movable deflector trough 51 (Fig. 7). Water from conduit 29 washes the thread into and through tube 13. At the other end of tube 13, the thread is deflected in a similar manner into tube 14. The thread is thus caused to travel through all the treating tubes in succession. As shown in Fig. 8, tube 22 discharges against a baffle 56 into a waste-collecting drainage receptacle 57. When spinning-in is completed, the thread issuing from nozzle 55 is broken, and the running thread is led round guide-wheel 58 to a collecting device. When a change-over to the after-treating position is made, all the deflector troughs such as 48 and 51 and also baffle 56 are moved into the appropriate positions. The trough 48 is swung about its pivot 61 to a position which allows the liquid from pipe 45 to flow down spillway 69 to discharge conduit 71. Trough 51 is similarly swung to a position which allows liquid from tube 12 to flow to discharge conduit 83. As shown in Fig. 8, the drain-basket 57 is provided to collect the thread as waste during the spinning-in, the baffle 56 being then in the position shown in broken lines. The baffle is moved into the full-line position for the after-treatment. The various treatment tubes may be of uniform cross-section throughout their length, or may be of enlarged cross-section adjacent their discharge ends. Straight or curved tubes may be used.ALSO:<PICT:0686339/IV (c)/1> <PICT:0686339/IV (c)/2> <PICT:0686339/IV (c)/3> <PICT:0686339/IV (c)/4> Thread or yarn is subjected to treatment with various liquids in succession by passing it through a series of tube systems together with the desired liquids, a separate tube system being used for each treatment liquid and liquid being separated from the thread after leaving each tube system. The apparatus is provided with partly or wholly displaceable guide-ways situated between the various tube systems so that the thread may readily be threaded through the apparatus before the start of the liquid treatments. A feeding-in liquid, e.g. water, is led from the outlet of each tube system over the guide-way to the inlet of the subsequent tube system, the thread being carried along with it. When the thread is passing through the whole apparatus, the guide-ways are displaced so that liquid emerging from the outlet of each tube system is prevented from flowing into the next tube system. The treating liquids are then caused to flow through the separate tube systems and intermingling is avoided. As shown in Fig. 2, freshly spun viscose thread is after-treated with liquids while travelling through tubes 12-22. Each of the tubes is associated with a deflector-trough housing at each end. As shown in Fig. 5, thread is led over a vitreous guide 43 to a temporary collecting device. Guide 43 is supplied with water from pipe 45. The thread is then cut and the water from guide 43 washes the running thread over movable trough 48 and stationary trough 49 to the flared funnel mouth 50 leading to tube 12. The thread is carried through tube 12 by water from nozzle 77 and is discharged into a movable deflector trough 51 (Fig. 7). Water from conduit 29 washes the thread into and through tube 13. At the other end of tube 13, the thread is deflected in a similar manner into tube 14. The thread is thus caused to travel through all the tubes in succession. As shown in Fig. 8, tube 22 discharges against a baffle 56 into a waste-collecting drainage receptacle 57. When spinning-in is completed, the thread coming from nozzle 55 is broken, and the running thread is led round guide-wheel 58 to a collecting device. When a change-over to the liquid-treatment position is made, all the deflector troughs such as 48 and 51 and also baffle 56 are moved into the appropriate positions. If desired all the deflector troughs and baffle 56 may be moved simultaneously. Trough 48 is swung about pivot 61 to a position which allows liquid from pipe 45 to flow to the discharge conduit 71. Trough 51 is similarly swung to allow liquid from tube 12 to flow to discharge-conduit 83. As shown in Fig. 8, the drain-basket 57 collects the thread as waste during the spinning-in, the baffle 56 being in the position shown in broken lines. The baffle is moved into the full line position for the liquid-treatment. Curved or straight tubes may be used and the tubes may be of uniform cross-section throughout their length, or may be of enlarged section adjacent their ends.