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
  • D01D5/08—Melt spinning methods
  • D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
• • 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
  • D01D5/08—Melt spinning methods
• • 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
  • D01D13/00—Complete machines for producing artificial threads
  • D01D13/02—Elements of machines in combination

Definitions

• the invention relates to a process for the production of a multifilament composite yarn in a melt spinning process according to the preamble of claim 1 and to a melt spinning apparatus according to the preamble of claim 10.
• synthetic yarns these are usually made of a bundle of fine fibers extruded filament strands generated.
• the bundled filament strands within a filament bundle can then be drawn off and drawn as a thread.
• the composite yarn thus consists of at least two filament bundles, each having a plurality of filament strands which are combined after stripping and stretching to the composite thread.
• the filaments of the filament bundles can be made of a same polymer material with the same additives, the yarn effects are based essentially on the different treatments of the filament bundles.
• composite threads can be produced in which the filaments have different shrinkage behavior in order to obtain a type of crimping, for example, in further processing by forming bends and loops.
• the filament bundles of a composite thread made of a polymer material with different additives for example produce different color pigments.
• the yarn effects in the composite thread are essentially shaped by the visual appearance.
• the treatment of the filament bundles to form the composite thread is the same for both filament bundles.
• carpet yarns are produced in a mixed color, which results from the merging of differently colored filament bundles.
• the preparation quantity which is missing for optimal further processing is applied in a second wetting.
• the filament bundles are wetted with a predetermined subset of a preparation fluid.
• the invention is based on the finding that the preparation application of a filament bundle can be advantageously used to influence the production of composite threads.
• advantageous yarn properties and treatment sequences can be influenced. It is possible to carry out the preparation application on a filament bundle in one step with one of the preparation stations or in several steps with both preparation stations.
• One or all of the filament bundles can be removed from the spinnerets without auxiliary wetting in the dry state.
• the inventive method as well as the enamel spinning device according to the invention thus form a high degree of flexibility to be able to produce composite threads of all kinds.
• the filament bundles are given a main wetting after being drawn in a second preparation station.
• the main wetting process essentially the finish required for the further processing of the thread in a subsequent process after the spinning process is introduced into the filament bundle.
• the amounts of the preparation fluid which should only be usable for subsequent processes, can therefore be kept to a large extent out of the melt spinning process.
• the main wetting on the filament bundles can be applied to the filament bundles after stretching with identical or unequal fluid applications.
• composite yarns, in which the yarn effects are produced essentially by the polymer composition can be formed by filament bundles with uniformly sized preparation jobs.
• unequal fluid orders can advantageously also be supplied to the filament bundles.
• the method variant is preferably carried out in which, after the merging, the filament bundles guided without auxiliary wetting are twisted during removal by an air treatment.
• the stripping and stretching of the filament bundles is preferably carried out by a plurality of godets, on which the filament bundles are held individually or together side by side with an S-guide or Z-guide.
• the preparation application in the auxiliary treatment and in the main wetting is adjusted to whether heat treatment is to be effected simultaneously via the godets.
• a so-called boil-out of the water from the filament bundle can advantageously be dispensed with by a very small proportion of water in the preparation application in the auxiliary wetting.
• the filament bundles without auxiliary wetting would be particularly suitable for being guided at low angles of wrap on the heated mantles of the godets.
• the filament bundles can be combined in different ways to form the composite thread.
• the filament bundles are brought together together by a turbulence to the composite thread. In this case, an intensive mixing of the individual filament strands within the composite thread is achieved.
• the carpet yarns which are also referred to as BCF yarns, can preferably be produced by stuffer box texturing.
• the filament bundles are brought together together by upsetting in a stuffer box and deducted to the textured thread.
• the method variant in which all filament bundles receive auxiliary wetting during a process start, preferably for manual guidance by a hand injector, is particularly advantageous in order to obtain an optimized utilization of the preparation stations in each of the operating states occurring in a melt spinning process.
• the deduction and the removal of the filament bundles must be guaranteed to Garnabfall disposer without interruption when an operator with a hand injector threading the filament bundles successively in the processing units of the melt spinning device.
• the auxiliary wetting of the filament bundles thus makes possible a low-friction inlet, so that the suction force of a hand injector can produce the required thread tension for the withdrawal of the filament bundles.
• the enamel spinning device according to the invention all types of multifilament composite threads can be produced.
• the main wetting for application of the preparation fluid to the filament bundles is carried out in the preparation stations in the second preparation station, which is advantageously arranged downstream of the drawing device in the yarn path.
• the amounts of preparation fluid can be applied to the filament bundles, which is required for the respective process and for the further treatment of the respective filament bundle.
• the enamel spinning device According to an advantageous development of the enamel spinning device according to the invention, it is provided to form the preparation points of the first preparation station and / or the preparation sites of the second preparation station separately controllable. This results in a high flexibility in choice and adjustment for applying the auxiliary and main wetting of the filament bundles.
• the development of the melt spinning device according to the invention in which the preparation sites of the first preparation station in the yarn path, a swirl nozzle device with a plurality of swirl nozzle devices is subordinate, is particularly suitable to withdraw one or all filament bundles in the dry state and to stretch. The composite of the filaments within the filament bundle is secured by a twist.
• the draw-off devices and the drafting devices are preferably designed such that the godets adjacent to one another in the yarn path can be driven in opposite directions to realize an S-guide or Z-guide. This makes compact arrangements in low-cantilevered godets and short machine racks executable.
• the compacting device for merging the filament bundles to the respective composite thread can be run as Verwirbelungsaggregate or texturing.
• Fig. 1 shows schematically a front view of a first embodiment of the invention melt spinning device
• FIG. 2 schematically shows a side view of an exemplary embodiment of a compacting device.
• FIG 4 shows schematically a side view of a further embodiment of a compacting device
• a first embodiment of the invention melt spinning device is shown in several views.
• the embodiment in a front view and in Figure 2 is shown schematically in a side view.
• the following description applies to both figures.
• the exemplary embodiment has a spinning device 1, which contains a plurality of juxtaposed spinnerets 2.1, 2.2 and 2.3.
• the spinnerets 2.1, 2.2 and 2.3 are connected via melt lines with diredarge- spinnpumpen.
• a primary melt is supplied under pressure to extrude a plurality of filament strands per spinneret.
• the spinnerets 2.1, 2.2 and 2.3 have for this purpose on their underside a nozzle plate with a plurality of nozzle bores.
• the filament strands extruded per spinneret 2.1 to 2.3 each form a filament bundle 3.1, 3.2 and 3.3.
• a cooling device 4 which has a cooling shaft 4.1 and a blowing chamber 4.2 adjacent to the cooling shaft 4.1. Via the blow chamber 4.2, a cooling air flow can be generated in the cooling shaft 4.1 for cooling the filament strands.
• a bundling device 5 is provided, which has a collecting thread guide 6.1 to 6.3 centrally of each spinneret 2.1 to 2.3. So is the collection thread leader 6.1 of the spinneret 2.1, the collecting apron 6.2 of the spinneret 2.2 and the collecting apron leader 6.3 of the spinneret 2.3 assigned.
• the filament strands are merged to the filament bundles 3.1,3.2 and 3.3.
• the bundling device 5 is assigned a first preparation station 7.1 of a preparation device 7.
• the preparation station 7.1 has in this embodiment per filament bundle in each case a preparation point 8.1, 8.2 and 8.3, in which the associated filament bundles 3.1, 3.2 and 3.3 optionally receive an auxiliary wetting.
• the preparation points 8.1, 8.2 and 8.3, a metering pump 9 is assigned in this embodiment, which is connected to a tank 11.
• the metering pump 9 can be controlled via the control unit 10.
• Below the cooling shaft 4.1 an adjacent chute 37 is arranged with a arranged on the outlet side Kammfaden flourish 12. Within the chute 37, the filament bundles 3.1, 3.2 and are brought together by a determined by the distance of the spinnerets 2.1 to 2.3 spinning division to a treatment distance.
• the filament bundles 3.1 to initially brought by the Kammfaden founded 12 in the treatment distance to each other, so that the filament bundles are 3.1 to parallel next to each other with a short distance in the range of 3-8 mm feasible.
• the bundling of the filament bundles could also take place directly below the chute 37.
• the first preparation station 7.1 would be arranged below the chute 37.
• the filament bundles 3.1 to 3.3 are each assigned a swirl nozzle 39.1, 39.2 and 39.3 a swirl nozzle device 39.
• the swirl nozzles 39.1 to 39.3 each have a compressed air connection on to the filament bundles
• the swirl nozzles 39.1 to 39.3 can be controlled jointly or separately within the swirl nozzle device 39.
• a discharge device 13 and a stretching device 14 is arranged, which are formed together by two Galettenduos 15.1 and 15.2.
• Each of the godet duos 15.1 and 5.2 has two driven godets.
• the godets are driven by separate electric motors in opposite directions of rotation, so that filament bundles 3.1 to 3.2 can be guided in an S-guide with simple looping for drawing and drawing.
• left-handed and right-handed electric motors are used to drive the godets of Galettenduos 15.1 and 15.2.
• the galette coats of the godets of the godets 15.1 and 15.2 are heated to stretch the filament bundles, in particular in the transition region between the two godet duos 15.1 and 15.2.
• a speed difference is set on the godets of the first godet dome 15.1 and the godets of the second godet godet 15.2.
• the first pair of godets 15.1 forms the take-off device 13 and serves to pull off the filament bundles 3.1 to 3.3.
• the second pair of godets 15.2, forms the drawing device 14 and serves to stretch the filament bundles 3.1 to 3.3.
• the second pair of godets 15.2 is driven at a drawing speed which is higher than the take-off speed of the first godet dome 15.1.
• the second preparation station 7.2 has directly adjacent preparation sites 16.1,
• a metering pump 17 which is supplied together by a metering pump 17 with a Reparationsiluid.
• the preparation is in a tank 19 held, which is connected to the metering pump 17.
• the metering pump 17 is coupled to a control unit 18, so that the length of the preparation fluid which leads in the preparation sites 16.1 to 16.3 to a main wetting of the filament bundles 3.1 to 3.3, is adjustable.
• the preparation station 7.2 follows a compacting device 20.
• the compacting device 20 has a turbulence unit 21, in which the filament bundles 3.1, 3.2 and 3.3 run in together via an inlet yarn guide 22 and are brought together by means of an air treatment to form the composite yarn 26.
• Such swirling units 21 are generally known and are based on the fact that the filament bundles guided in a thread channel are swirled by a continuously or pulsating air jet. As a result, a mixing of the filament strands takes place, so that the composite thread 26 is formed from a closed filament bundle.
• the composite yarn 25 is guided over the Umlenkgalette 23 to the winding device 24 and wound in a winding point 25 of the take-up device to a coil 31.
• the winding point 25 in the winding device 24 has for this purpose a deflection roller 38, a traversing device 27 and a pressure roller 30 in order to deflect the composite thread 26 on the circumference of the coil 31.
• the coil 31 is held on a driven winding spindle 28.1, which is held projecting together with a second winding spindle 28.2 on a winding turret 29.
• Such winding devices 24 usually have a plurality of winding points 25 next to one another in order to simultaneously wind a plurality of bobbins on a long projecting winding spindle 28.1.
• several composite threads can be side by side.
• the embodiment of Fig. L and Fig.2 is shown in an operating condition in which a composite yarn is produced from a plurality of extruded filament strands.
• each of the spinnerets 2.1, 2.2 and 2.3 each fed a melt stream under pressure.
• the melt stream of the spinnerets 2.1, 2.2, and 2.3 can in this case be provided by a common melt source or, alternatively, be produced by three separate melt sources.
• the filament strands pass through a cooling zone, which is formed by the cooling device 4 and in particular by the cooling shaft 4.1.
• the filament strands are cooled so that the thermoplastic material of the filament strands solidifies.
• a so-called Querstromanblasung is shown, in which a transversely directed cooling air flow is directed to the filament strands.
• alternative methods are known in the art, which would also be used to cool such filament strands.
• So-called radial blow-ups are known both with an air flow from outside to inside or alternatively from the inside out through a ring-shaped filament bundle and also possible cooling systems for such filament strands.
• the filament strands produced by the spinnerets 2.1, 2.2 and 2.3 are combined by the bundling devices 5 assigned to the spinnerets 2.1 to 2.3 to form a plurality of filament bundles 3.1, 3.2 and 3.3. guided.
• the extruded through one of the spinnerets 2.1 to 2.3 filament strands are combined together to form a filament bundle.
• the filament strands produced by one of the spinnerets 2.1 to 2.3 it is also possible for the filament strands produced by one of the spinnerets 2.1 to 2.3 to be divided into a plurality of filament bundles.
• the filament bundles 3.1, 3.2 and 3.3 are produced by corresponding collection adapters 6.1, 6.2 and 6.3.
• the collection aprons 6.1, 6.2 and 6.3 form the spinnerets 2.1, 2.2. and 2.3 have a first point of convergence and are preferably held centrally with the spinnerets so that the outer filament strands receive a substantially equal deflection to form the filament bundles.
• the preparation station 7.1 contains controllable preparation sites 8.1, 8.2 and 8.3, in which an optional auxiliary wetting on the filament bundles 3.1, 3.2 and 3.3 is produced.
• the preparation points 8.1, 8.2 and 8.3 are jointly controllable as a group, so that the setting of the auxiliary wetting takes place essentially via the control of the metering pump 9 and the control unit 10.
• the metering pump 9 can be activated or deactivated by the control unit 10 so that, depending on the operating state of the metering pump 9, a preparation fluid held in the tank 11 can be supplied to the preparation points 8.1, 8.2 and 8.3.
• the filament bundles 3.1, 3.2 and 3.3 are provided only at the beginning of a process start with an auxiliary wetting.
• a hand injector 32 As shown in the illustration in FIG. It is common that at the start of the process after piecing the filament bundles are received via a hand injector 32 and continuously withdrawn by a suction air flow from the spinnerets and discharged to a Garn empiricaler.
• the hand injector 23 is usually manually guided by an operator to thread the filament bundles in the godets and aggregates to start the manufacturing process. In this phase, it must be ensured that the filaments are prevented from becoming entangled and caught during removal by the hand injector 32.
• the metering pump 9 is activated via the control unit 10, so that the filament bundles 3.1, 3.2 and 3.3 are continuously fed via the preparation sites 8.1, 8.2 and 8.3 a preparation amount substantially matched to the application as auxiliary wetting.
• the metering pump 9 is deactivated via the control unit 10 and no auxiliary wetting is produced on the filament bundles 3.1 to 3.3 in the preparation stations 8.1 to 8.3.
• the filament bundles 3.1, 3.2 and 3.3 pass through the preparation station 7.2 or an auxiliary wetting and are essentially removed in a dry state from the spinnerets 2.1 to 2.3.
• a twist is generated at each of the filament bundles 3.1, 3.2 and 3.3.
• the twisting of the filament bundles 3.1, 3.2 and 3.3 is carried out by the swirl nozzles 39.1, 39.2 and 39.3, the swirl nozzle device 39 in which a transverse air jet for rotating the filament bundles is generated.
• the stripping and stretching of the filament bundles 3.1 to 3.3 takes place via the godets duo 15.1 and 15.2 of the discharge device 13 and the drawing device 14.
• the godets of the godet duo 15.1 and 15.2 are preferably designed with heated godet coats.
• the thermoplastic materials of the filaments can be heated very quickly to a drawing temperature. men, so that even with simple wraps on the godets of the godet pair 15.1 and 15.2 a high stretching of the filament bundles 3.1 to 3.3 is possible.
• the filament bundles 3.1, 3.2 and 3.3 are therefore guided s-shaped and z-shaped on the circumference of the godets.
• the filament bundles 3.1 to 3.3 are wetted in a second preparation station 7.2 of the preparation device 7.
• the preparation station 7.2 has three side-by-side preparation points 16.1, 16.2 and 16.3, in which each of the filament bundles 3.1 to 3.3 receives a main wetting.
• the preparation amount of the preparation fluid is essentially adjusted to the further processing in the manufacturing process and in the subsequent process.
• the preparation sites 16.1 to 16.3 are jointly supplied as a group with a preparation fluid, for this purpose, a metering pump 17 is connected to the preparation sites 16.1 to 16.3.
• the metering pump 17 is coupled to a control unit 18, by means of which essentially the quantity of the preparation fluid in the preparation points 16.1 to 16.3 is adjustable.
• the preparation fluid is taken from a tank 19, which is connected to the metering pump 17.
• the filament bundles 3.1 to 3.3 are brought together by the compacting device 20 to form the composite thread 26.
• the merging of the filament bundles 3.1 to 3.3 carried by an air treatment by means of a Verwirbelungsaggregates 21.
• the filament bundles run through 3.1 to 3.3 together a thread treatment channel and are treated via an air flow such that the filament strands of Filament bundles 3.1 to 3.3 mix together. This results in a multifilament composite thread 26.
• the composite yarn 26 is withdrawn via the Umlenkgalette 23 from the compaction device 20 and at the winding point 25 of Auiwickel worn 24 out.
• Umlenkgalette 23 is preferably arranged relative to the winding device 24 such that a substantially horizontal guide to the winding point 25 is possible.
• 24 larger deflections can be avoided even at a variety of winding positions within the take-up.
• the embodiment of Fig.l and Fig.2 is thus particularly suitable to produce a fully stretched composite thread.
• the number of filament bundles merged into the composite thread is also exemplary. Thus, two, three, four or even more filament bundles can be combined to form a composite thread.
• the compacting device 20 can be formed such that a crimped composite thread is formed.
• FIG. 3 an alternative of the compacting device 20 for this purpose is shown schematically in a view, as would be used, for example, in the exemplary embodiment according to FIG. 1 and FIG.
• the compacting device 20 has a texturing unit 33, which is arranged above a cooling drum 35.
• the texturing unit 33 consists of a nozzle part and an upsetting part, wherein the filament bundles 3.1 to 3.3 are conveyed together via the nozzle part into the compression part.
• the filament bundles 3.1 to 3.3 are upset with the aid of a heated conveying medium to form a thread stopper 34.
• the yarn plug 34 is then deposited on the circumference of a driven cooling drum 35. After cooling of the yarn plug 34 on the circumference of the cooling drum 35 of the yarn plug is dissolved to the composite yarn 26 and on the Abziehgalette 36 recorded.
• a swirling unit 21 is provided between the Abziehgalette 36 and Umlenkgalette 23 to intensify the cohesion of the crimped filaments of the composite yarn 26.
• the speeds of Abziehgalette 36 and the Umlenkgalette 23 are set to one another such that the filament strands of the composite yarn 26 can relax.
• the compacting device 20 shown in FIG. 3 is thus particularly suitable for producing a carpet yarn, for example a tricolor composite thread, using the exemplary embodiments illustrated in FIG. 1 and FIG.
• a carpet yarn for example a tricolor composite thread
• the further procedure and the further treatments would be essentially identical to the illustrated and described embodiment.
• FIG. 3 For the production of carpet yarns, which are also referred to as BCF yarns, a further alternative embodiment of the compacting device 20 is shown in FIG.
• the exemplary embodiment differs from the exemplary embodiment according to FIG. 3 in that the filament bundles 3.1, 3.2 and 3.3 are textured separately by 3 texturing units 33.1, 33.2 and 33.3 arranged next to one another.
• the yarn plugs 34.1 to 34.3 produced by the texturing units 33.1 to 33.3 are cooled on the circumference of the cooling drum 35 and then drawn off via the peeling godet 36 as crimped partial threads 40.1, 40.2 and 40.3.
• the partial threads 40.1, 40.2 and 40.3 are fed together to the swirling unit 21 and connected to the composite thread 26.
• the crimped composite thread 26 is then fed via the Umlenkgalette 23 of the take-up device.
• the exemplary embodiment of the compacting device 20 shown in FIG. 4 represents a further alternative for merging the filament bundles 3.1 to 3.3.
• the melt spinning devices according to FIGS. 1 and 2 could alternatively be operated such that the second preparation station 7.2 is arranged downstream of the compacting device 20 in the yarn path, so that the composite thread receives a main wetting preparation order.
• the exemplary embodiment according to FIG. 5 has a spinning device 1 with two spinnerets 2.1 and 2.2, a cooling device 4, a bundling device 5 and a first preparation station 7.1 of the preparation device 7 with a plurality of preparation points 8.1 and 8.2.
• the preparation sites 8.1 and 8.2 are independently controllable and activatable.
• Each of the preparation sites 8.1 and 8.2 is assigned a metering pump 9.1 and 9.2 as well as a tank 11.1 and 11.2, each with a preparation fluid.
• the metering pumps 9.1 and 9.2 are independent of each other via the control units 10.1 and 10.2.
• the extraction device 13.1 and the drawing device 14.1 is associated with the spinneret 2.1 and the discharge device 13.2 and the drawing device 14.2 of the spinneret 2.2.
• the deduction Direction 13.1 is formed with a driven godet, which cooperates with a subsequent driven godet of the drawing device 14.1 in order to extract and stretch the filament bundle 3.1 extruded through the spinneret 2.1.
• the extraction device 13.2 and the stretching device 14.2 are identical to the embodiment of Fig.l and Fig.2 formed, so that reference is made to the above description.
• the filament bundle 3.2 generated by the spinneret 2.2 is drawn off and drawn through two godets 15.1 and 15.2.
• the drawers 14.1 and 14.2 is assigned a collecting godet 41, on whose circumference both filament bundles 3.1 and 3.2 can be guided.
• a second preparation station 7.2 is arranged, which has one preparation point 16.1 and 16.2 per filament bundle 3.1 and 3.2.
• the preparation points 16.1 and 16.2 are connected in common with a metering pump 17 and a tank 19.
• the metering pump 17 is electrically connected to the control unit 18.
• Below the preparation station 7.2 the compacting device 20 and the winding device 24 is arranged, which are formed in this case identical to the embodiment of Fig.l and Fig.2, so that reference is made to the above description at this point.
• the filament strands extruded through the spinnerets 2.1 and 2.2 are brought together separately to form a respective filament bundle 3.1 and 3.2 and are drawn off and drawn independently of each other.
• the filaments of the filament bundle 3.1 in the preparation site 8.1 are given an auxiliary treatment.
• the metering pump 9.1 is activated via the control unit 10.1 and conveys a preparation fluid to the preparation site 8.1.
• the extruded through the spinneret 2.2 filament strands are performed without an auxiliary wetting in the filament bundle 3.2.
• the preparation site 8.2 is not active and the filament bundle 3.2 passes through the preparation station 7.1 without auxiliary wetting.
• the preparation site 8.2 is activated.
• the cohesion of the filament strands of 3.2 is achieved by a twist of the filament strands, which is generated by a swirl nozzle 39.1.
• the swirl nozzle 39.1 is assigned here to the preparation station 7.1.
• the extraction devices 13.1 and 13.2 and the drafting devices 14.1 and 14.2 are such that the filament strands of the filament bundle 3.1 are stretched teilver and the filament strands of the filament bundle 3.2 are fully stretched. This results in different physical properties, which in particular affect a subsequent heat treatment.
• the two filament bundles 3.1 and 3.2 are brought together, they are provided with a primary wetting in the second preparation station 7.2.
• the preparation points 16.1 and 16.2 are connected thereto as a group with the metering pump 17.
• the preparation sites 16.1 and 16.2 are controlled and supplied independently of each other.
• an alternative embodiment of the preparation station 7.2 is shown in dashed lines in Figure 5.
• the filament bundles 3.1 and 3.2 are prepared independently of each other in the preparation sites 16.1 and 16.2 individually with a main wetting.
• the merging of the filament bundles 3.1 and 3.2 and the winding of the composite thread 26 takes place analogously to the embodiment according to Fig.l and Fig.2, so that reference is made at this point to the aforementioned description.
• melt spinning device is particularly suitable to apply the inventive method for producing a composite yarn, wherein the yarn effects of the composite yarn resulting from different treatments.
• so-called BSY yarns can advantageously be produced in which the filament strands of the composite thread have different shrinkage inclinations which can be triggered during a heat treatment and lead to loops and arcs in the composite yarn.
• the cooling device 4 can be further developed in such a way that the filament bundles 3.1 and 3.2 are cooled by different generated cooling air streams.
• the method according to the invention and the melt-spinning device according to the invention thus offer a high degree of flexibility in the production of various composite threads. It is essential here that the thread wetting applied to the respective filament bundles in the preparation stations is controllable or switchable. On the one hand, this makes it possible to perform a wetting adapted to the respective treatment and, on the other hand, to produce additional effects in the formation of the composite thread. LIST OF REFERENCE NUMBERS

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

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• 2011
  • 2011-07-29 CN CN201180050384.2A patent/CN103154334B/zh not_active Expired - Fee Related
  • 2011-07-29 WO PCT/EP2011/063065 patent/WO2012052203A1/de active Application Filing
  • 2011-07-29 EP EP11739046.8A patent/EP2630279B1/de not_active Not-in-force
• 2013
  • 2013-04-15 US US13/862,732 patent/US20130221559A1/en not_active Abandoned

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