Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/06—Wet spinning methods
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
  • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
  • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
  • D02G1/164—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam in the presence of a liquid, e.g. a crimp finish
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
  • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
  • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
  • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
  • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch

Definitions

• the present invention relates to a method and a device for wet spinning, drawing and winding up a multifilament thread, in particular a viscose thread.
• a multifilament viscose thread is created by bringing liquid viscose into contact with a spinning bath liquid.
• the spinning bath liquid can be, for example, a sulfuric acid bath.
• Salts which are, for example, sodium sulphate, zinc sulphate or magnesium sulphate, can be added to the sulfuric acid bath.
• the filaments are drawn off from the spinning bath liquid and drawn. The filaments must then be cleaned of chemical reactions.
• the cleaning process can be carried out by a water treatment, a desulfurization treatment or a bleaching treatment.
• the filaments treated in this way are then dried and, after an oil application, conveyed to a winding device.
• the filaments are twisted and wound into a spool.
• Such a method for the continuous production of a multifilament thread is known from DE 39 30 652 AI. With such a procedure, however, only bobbins with a small amount of thread can be wound up. Larger amounts of thread on a spool can be achieved by winding the filaments in the form of a smooth thread. The further processing of such Smooth threading is relatively difficult since there is no thread closure between the individual filaments.
• Devices for producing a multifilament thread, which can be divided into two types.
• the filaments are wrapped around a pair of rollers.
• the rollers are inclined to one another so that the filaments move in the axial direction from one side of the machine to the other.
• the filaments are subjected to cleaning.
• the filaments are then dried on the same rollers.
• the filaments can be stretched before cleaning.
• the drawn, cleaned and dried filaments are then twisted and wound into a bobbin.
• the individual treatment steps of the filaments can be carried out in different units.
• the device for the continuous production of a multifilament thread a spinning device, a drawing device for drawing the filaments, a cleaning device for cleaning the filaments, a drying device for drying the filaments, a twisting device and a winding device.
• the present invention is based on the object of specifying a method and a device for wet spinning, drawing and winding up a multifilament thread, in particular a viscose thread a thread is provided that is suitable for further processing.
• This object is achieved by a method with the features of claim 1 and a device with the features of claim 13.
• Advantageous further developments are the subject of the subclaims.
• a thread-forming material be introduced into a spinning bath liquid through at least one spinneret having a plurality of nozzle openings to form filaments.
• the filaments are drawn off from the spinning bath liquid and subjected to a drawing process, cleaning and drying.
• the filaments are wound into a spool, for example, they are subjected to a swirling process.
• the filaments are intertwined at more or less irregular intervals at so-called fixed points. These fixed points give the filaments sufficient cohesion for further processing.
• a multifilament thread, which consists of intermingled filaments can, for example, be spooled on a package, such a package being able to hold approximately three times the amount of yarn than a conventional package with a twisted thread.
• the filaments be swirled after drying.
• the filaments are preferably intermingled after drying, but in front of a delivery unit through which the multifilament thread is fed to a winding process.
• a tradition can be set which causes the filament bundles to open and thus leads to an intensive and stable loop structure.
• the filaments are treated with a preparation before or after the swirling. This can further increase the stability of the thread closure.
• the filaments go through a first and a second drying process.
• the filaments are interlaced between the first and the second drying process.
• the first drying process, the swirling and the second drying process are preferably carried out directly one after the other. This measure intensifies and accelerates the entire drying process.
• the thread can relieve internal tensions during the intermingling, which has less shrinkage in further processing.
• the filaments are preferably dried on a first section of a drying godet. After the filaments have passed the first section of a drying godet, they are subjected to a swirl. The filaments are intermingled in a tang nozzle which is operated with a cold or hot medium, preferably compressed air. After the filaments have been intermingled, the multifilament thread, which emerges from the tangle nozzle, is passed to a second section of the drying godet and fed to a final drying of the thread.
• the sections of the drying godet have different diameters, so that the thread is passed down between the sections.
• the filaments are interlaced after cleaning and before drying.
• the filaments are treated with a lubricant on the washing godet.
• the intermingling before drying or final drying has the advantage that the multifilament thread can shrink better due to its crimping and thus has less shrinkage in the further processing process.
• This process variant can also already cause the filaments to dry out by using hot air.
• the use of hot air already leads to a pre-shrinking, since the removal of the water leads to a structural change and thus a partial reduction of tensions.
• the interlacing device is arranged in front of the winding device, so that a multifilament substantially smooth thread can be wound into a bobbin, in particular a cross-wound bobbin, which has up to three times the amount of a thread compared to the conventionally produced bobbins.
• the intermingling device viewed in the running direction of the filaments, be arranged downstream of the drying unit.
• the swirling device is preferably formed in front of a delivery plant in order to be able to set a lead without influencing the subsequent winding device.
• the device have a preparation device which is arranged upstream or downstream of the interlacing device.
• the drying device has a first and a second drying unit and that the filaments pass through the intermingling device before the second drying unit.
• the drying device preferably has a drying godet.
• a preferred embodiment of the drying device is one in which the first and second drying units are each formed by a first and a second section of a drying godet, respectively, the diameter of the first section of the drying godet being larger than the diameter of the second section of the drying godet.
• the filaments are passed through the intermingling device when they leave the first section of the drying godet and are then passed to the second section of the drying godet, which is of smaller diameter. This ensures a length compensation caused by the swirling of the yarn.
• the device has a swirling device which, viewed in the running direction of the filaments, is arranged downstream of the cleaning device.
• the intermingling after the cleaning device and before the drying device has the advantage that the multifilament thread is subject to less shrinkage in the further processing process.
• the device be designed such that the swirling device is preceded by a treatment device by means of which the filaments are treated with a lubricant.
• the lubricant enables an improved detachment of the filaments from godets, in particular from a drying godet.
• the cleaning and treatment device preferably form a structural unit.
• the cleaning device comprises at least one washing godet.
• the treatment device is arranged at a distance from the jacket of the washing godet.
• the swirling device comprise at least one Tangel nozzle, preferably operated with cold or hot compressed air.
• FIG. 1 shows schematically a first exemplary embodiment of a device for producing a multifilament thread
• FIG. 2 shows a swirling device between a drying device and a delivery unit
• Figure 3 shows a drying device with a swirling device.
• FIG. 1 shows a first exemplary embodiment of a device for producing a multifilament thread.
• This device is, for example, the production of a viscose thread by the known tube spinning process.
• a liquid viscose is fed from a storage container 1 via a feed line 2 to a spinning device 3.
• the spinning device 3 has at least one spinneret having a plurality of nozzle openings, through which the thread-forming viscose is passed in order to form filaments 10.
• the liquid viscose enters the spinning tube 4 from the spinneret (not shown).
• a spinning bath liquid also called a coagulation liquid, is fed to the spinning tube 4.
• the spinning tube 4 is supplied with the coagulation liquid by a pump 9 which is arranged in a line 8.
• the line 8 connects the spinning device 3 to a collecting container for the coagulation liquid.
• the coagulation liquid emerging from the spinning tube 4 is collected in a collecting container 5 and fed to the collecting container 6 via a line 7.
• the viscose filament 10 emerging from the spinning tube 4 is guided over a drawing device 11.
• the stretching device 11 consists of two coagulation godets 34 and 35 which are wrapped several times by the filament bundle 10.
• the coagulation godets 34 and 35 are driven by means of the drive device 36.
• the coagulation godets 34 and 35 are wetted on their surfaces with a spinning bath liquid.
• the filaments 10 are washed in the cleaning device 12.
• the cleaning device 12 comprises a washing godet duo 15.
• the washing godet duo 15 is connected on one side to a drive 37.
• a cleaning agent for example water, is continuously applied to the surface of the washing godet duo 15.
• the filament bundle 10 is passed several times over the godet duo 15.
• the filaments 10 are dried in a drying device 13, which comprises a heated drying godet 16.
• the drying godet 16 is driven by a drive 38.
• the thread 10 is withdrawn from the drying godet 16 by the delivery mechanism 22 and guided to a winding device 32. In this case, the thread 10 runs into the winding device via a head thread guide 40.
• the thread 10 is then moved back and forth within a traversing stroke by means of a traversing device (not shown here) and wound on a spool 14.
• the coil 14 is formed on a spindle 41 which is driven by the spindle drive 39.
• a swirling device 17 is arranged between the washing godet 15 and the drying godet 16, which comprises a tangel nozzle 18.
• the tangel nozzle 18 is operated by means of cold or hot compressed air 19.
• the filaments 10 drawn off from the washing godet 15 pass through the tangle nozzle 18, in which they are swirled.
• the thread 10 is guided through a channel within the tangel nozzle.
• An essentially transversely aligned compressed air connection opens into this channel.
• the compressed air 19 then flows into the channel of the tangel nozzle 18.
• the filaments of the filament bundle 10 are swirled and the individual filaments are intertwined.
• the swirling device 17 is operated with hot air. Both the drying effect of the hot air and the shrinking process generated by the heating of the filaments and the stresses released in the process can be used to advantage.
• a treatment device 33 is arranged directly in the area of the thread flow from the washing godet duo 15.
• the swirling device 17 is arranged between the washing godet duo 15 and the drying godet 16
• the speeds of the washing godet duo and the drying godet are matched to one another in such a way that the thread 10 is fed to the swirling device 17. This ensures a length compensation of the thread, because when the thread is interlaced, the filaments shorten compared to a plain yarn.
• FIG. 2 shows part of the device according to the invention for the continuous production of a multifilament thread 10.
• the filament bundle 10 passes through a drying device 13.
• the drying device 13 consists of two godets 16.1 and 16.2. From the drying device 13 it passes through a tangel nozzle 18 which has an inlet channel 21 through which the filament bundle 10 runs.
• In the inlet channel 21 opens a transverse to the inlet channel 21 aligned in the thread running compressed air connection 42 through which compressed air 19 is introduced into the tangel nozzle.
• the filaments 10 are swirled in such a way that they are given sufficient cohesion for further processing.
• the multifilament thread 10 which leaves the tangle nozzle 18 due to the thread closure of the filaments 10, is drawn off by a delivery mechanism 22 and fed to a winding device, not shown, through which a bobbin 14, as shown in FIG. 1, is wound.
• FIG. 3 shows a special embodiment of the drying device.
• the drying device 13 comprises a drying godet 16 and a spacer roller 23.
• the drying device 13 has a first and a second drying unit 24, 25.
• the first drying unit 24 is formed by a first section 26 of the drying godet 16 and a first section 27 of the spacer roller 23.
• the second drying unit 25 is formed by a second section 28 of the drying godet 16 and a second section 29 of the spacer roller 23.
• the diameter of the first section 26, 27 of the drying godet 16 or the spacer roller 23 is larger than the diameter of the second section 28, 29 of the drying godet 16 or the deflecting rollers 23.
• the thread 10 first passes through the first drying unit 24 and then through the second drying unit 25.
• the thread wraps around the drying godet 16 and deflection roller several times.
• the sections 26 and 28 of the drying godet can be heated together or independently of one another.
• the thread is drawn off from the first drying unit 24 via a deflecting roller 30 and fed to the tang nozzle 18.
• the thread 10 is swirled in the tangle nozzle 18, so that the filaments of the thread 10 are intertwined.
• the thread 10 is fed to the second drying unit 25 via a deflection roller 31. After the thread 10 has passed through the second drying unit 25, it is fed to the further production steps. Because the diameter of the first section 26, 27 is larger than the diameter of the second section 28, 29, a shortening of the thread 10 caused by the intermingling of the filaments is compensated for.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Artificial Filaments (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7798932

Family Applications (1)

Country Status (5)

Cited By (7)

Citations (3)

• 1997
  • 1997-07-02 WO PCT/EP1997/003449 patent/WO1998001605A1/de not_active Application Discontinuation
  • 1997-07-02 EP EP97933645A patent/EP0874923B1/de not_active Expired - Lifetime
  • 1997-07-02 CZ CZ981032A patent/CZ103298A3/cs unknown
  • 1997-07-02 DE DE59701753T patent/DE59701753D1/de not_active Expired - Fee Related
  • 1997-07-02 CN CN97190845A patent/CN1197488A/zh active Pending

Patent Citations (3)

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