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
  • D01D5/12—Stretch-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
  • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
  • D01D10/02—Heat treatment
• • 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 method for melt-spinning, drawing and winding a multifilament yarn into an FDY yarn and to an apparatus for carrying out the method according to the preamble of claim 7.
• a generic method for melt-spinning, stretching and winding a multi-filament yarn and a generic device for carrying out the method are known, for example, from DE 31 46 054 A1.
• POY yarns In the production of synthetic threads, a distinction is made between so-called POY yarns and FDY yarns depending on the degree of orientation of the molecular chains of the polymer material within the yarn.
• POY yarns Pre Oriented Yarn (POY) yarns have a pre-oriented, unfinished structure. Such threads are preferably further processed in a draw-texturing process.
• FDY yarns In contrast, the Art Drawn Yarn (FDY) yarns have an oriented, fully stretched structure. These threads are processed without further treatment directly to a surface product.
• a FDY thread In order to be able to produce a so-called FDY thread in a single-stage process, the freshly extruded filaments are completely drawn after being brought together to form a thread and then wound up into coils.
• DE 31 46 054 A1 describes a method for producing a FDY thread. First, a plurality of filaments is extruded from a polymer melt, for example, a polyester or polyamide. The filaments are then cooled to solidify or crystallize the polymer material. For this purpose, it is customary to blow a stream of cooling air onto the filaments, so that the thread material cools to a temperature below the glass transition temperature.
• the filaments of the filament bundle are brought together by means of a preparation fluid, to be subsequently stretched by a godet system.
• a preparation fluid to be subsequently stretched by a godet system.
• the yarn is customary here for the yarn to be heated before being stretched in order to achieve a defined draw point.
• the heating of the thread takes place in the known method and the known device by a heated godet shell of the godet godet on which the thread is guided with a Sectionumschlingung. Due to the usual high draw speeds, which are above 4,000 m / min, resulting in a partial looping of the thread on the withdrawal godet only very short contact lengths to heat the thread sufficiently.
• EP 0 731 196 A1 discloses a method for melt-spinning, stretching and winding a synthetic thread, in which a plurality of heat treatments are carried out on the thread in order to obtain in particular a low-shrinkage thread.
• the yarn is subjected both to drawing and after drawing each a heat treatment in which the yarn is heated without being touched by a heated surface.
• the thread is guided at a distance from the heating surface of a heating plate, which is arranged between a withdrawal godet and a draw godet.
• a heating tube arranged between the cooling device and the withdrawal godet, in which the thread is heated substantially without contact.
• the thread already receives a Vorverstreckung, which is superimposed by a second, taking place between the godets Nachverstreckung.
• the method and known device known from EP 0 731 169 B1 is thus only suitable for producing special yarns by repeated heat treatments.
• the guidance of the thread is always carried out by gilette systems, which are formed from a driven godet and an overflow roller. In that regard, a high expenditure on equipment is required to produce fully drawn threads.
• WO 99/2 99 35 a further method and a further device is known, in which a filament bundle is stretched without cooling directly out of the spinning zone. For this purpose, the filament bundle is heated in several immediately adjacent to the spinneret heating zones.
• a first heating zone is formed immediately below the spinneret.
• the deduction of the filament bundle via heated godets, which form further heating zones.
• the heated godets are followed by a heating tube, through which a further heating zone is formed.
• a godet is provided to stretch the thread.
• the method and known device known from WO 99/2935 is based on the fact that a purely stress-induced crystallization is formed in the filaments of the filament bundle. Cooling and thus thermal crystallization is avoided.
• Another object of the invention is to provide a method and a device of the generic type, with which a plurality of parallel-spun filament bundles are possible to produce in a compact arrangement. This object is achieved by a method having the features of claim 1 and by an apparatus for performing the method with the features of claim 8.
• the invention is based on the surprising finding that two effects characterized by reservations add positively to the stretching of the filament bundle.
• two effects characterized by reservations add positively to the stretching of the filament bundle.
• the invention chooses a completely new way in which the preparation of the thread takes place only after stretching, so that the filament bundle is withdrawn substantially in the dry state after cooling from the spinning zone.
• the filaments of the filament bundle which are brought together in the dry state, thereby receive an electrostatic charge which, when the thread runs off the draw-off godet, leads to a spreading of the filament bundle.
• this effect now has a favorable effect on the heating of the filament bundle in the hot air atmosphere of the heating tube. So the hot air
• Atmosphere act directly on each filament of the spread filament bundle and reach even at high draw speeds the desired filament temperatures.
• Another advantage of the invention is that no additional energy is needed to evaporate the spin finish when heating the thread.
• the filaments of the filament bundle can be treated with high efficiency in hot air atmosphere of the heating tube.
• the filament bundle is prepared according to a preferred variant of the method immediately after heating in a stretched between two godets piece of thread. As a result, unwanted loading of the filament bundle can be avoided in the subsequent guidance and guarantee a secure thread closure until the thread is wound up.
• the filament bundle is guided with simple Operaumschlingonne in the range> 90 ° on the circumference of driven godets according to an advantageous embodiment of the invention.
• simple Operaumschlingonne in the range> 90 ° on the circumference of driven godets according to an advantageous embodiment of the invention.
• the guide sheath per filament bundle has a guide groove in which the filaments are performed.
• the hot air atmosphere within the heating tube for heating the filament bundle is heated to a temperature between 120 0 C and 240 0 C according to a preferred process variant.
• the heating tube has a length in the range of 800 mm to 2,500 mm, so that even at high thread speeds sufficient temperature control is possible.
• the cooling of the filament bundle required for the thermal crystallization is effected according to an embodiment of the invention by a cooling air flow, which acts on the filament bundle from outside to inside or from the inside to the outside.
• a cooling air flow which acts on the filament bundle from outside to inside or from the inside to the outside.
• the process variant is preferably used, in which the prepared thread for after-treatment at the periphery of one of the draw godets with a surface temperature in the range of 100 0 C to 180 0 C is heated.
• Such aftertreatment has had an effect on a favorable coil structure, especially with fine titers.
• the thread has a sufficient thread closure, which are usually produced by so-called entanglement nodes, which occur during the swirling of the filament bundle.
• the yarn is swirled before winding in a stretched between two driven godets thread piece wherein the swirl generates a number of at least 10 interlacing nodes per meter of thread length.
• the inventive device for carrying out the method according to the invention is characterized in that the preparation device is arranged downstream of the heating means in the yarn path and that the heating means is arranged as a heating tube with a hot air atmosphere for non-contact heating of the filament bundle between the withdrawal godet and one of the draw godets.
• the heating means is arranged as a heating tube with a hot air atmosphere for non-contact heating of the filament bundle between the withdrawal godet and one of the draw godets.
• Another advantage is that the filament material in all filaments is heated within the same distance to a filament temperature above the glass transition temperature, so that the position of the draw point on each of the filaments of the filament bundle is substantially the same. Thus, a high uniformity of the drawing and thus a uniformity of the physical properties produced on the filaments is achieved.
• the preparation device is preferably arranged in the yarn path between two godets.
• the preparation of the thread can be carried out directly in the draw zone.
• the godets each have a driven guiding jacket, through which the filament bundle can be guided with a simple partial winding in the range of> 90 °.
• short compact guide shells can be formed, on which one or more threads can be guided parallel to one another.
• the heating tube is according to an advantageous development of the invention. formed with a length which is in the range of 800 mm to 2,500 mm. In that regard, a respective adaptation to the process and a thread material is possible.
• the cooling device is preferably formed by a blowing agent, through which a cooling air flow from the inside to the outside or from the outside to the inside of the filament bundle can be generated.
• a blowing agent through which a cooling air flow from the inside to the outside or from the outside to the inside of the filament bundle can be generated.
• the withdrawal godet is arranged laterally next to the collection guides, which are assigned to a group of spinnerets.
• the filament bundles are guided parallel to one another next to each other on the collecting thread guides with the same direction of partial looping of> 45 ° each and are received parallel to each other at the circumference of the take-off godet at a treatment distance.
• the group of filament bundles which are guided on the circumference of the take-off godet, are guided in a close distance side by side through several heating pipes.
• the heating tubes are for this purpose preferably in a heating box next to each other formed, wherein the heating box is arranged downstream in a vertical position or in a horizontal position of the withdrawal godet.
• a very compact drafting field can be formed, which is characterized by a short overall height.
• the heating box for opening the heating tubes is formed in two parts, wherein one of the parts is at least one movable cover plate.
• the compactness of the entire device can be further improved by the fact that the take-up device per winding point in each case has a distributor roller, through which distributor rollers the threads running from a last galette are separated onto the winding points. This avoids a spreading out of a vertical plane and the threads can be distributed from the withdrawal godet essentially out of a horizontal plane to the individual winding locations.
• Fig. 1 shows schematically a view of a first embodiment of the device according to the invention for carrying out the method according to the invention
• Fig. 2 shows schematically a view of another embodiment of the device according to the invention for carrying out the method according to the invention
• FIG. 3 is a schematic view of a further embodiment of the device according to the invention for carrying out the invention
• a first embodiment of the inventive device for carrying out the method according to the invention for the production of a FDY yarn is shown.
• a heatable spinning head 1 For melt-spinning a mutlif ⁇ len thread, a heatable spinning head 1 is provided, which has on its underside a spinneret 3 with a plurality of nozzle openings and at its top a melt inlet 2.
• the melt inlet 2 is coupled to a melt source, not shown here, for example, an extruder.
• melt-leading and melt-promoting components may be arranged, which will not be discussed in detail at this point.
• the spinning head 1 carries on its underside in this embodiment, only a spinneret 3.
• such spinning heads are equipped with a plurality of spinnerets arranged in a row to simultaneously produce a plurality of threads side by side.
• only one threadline is shown in this embodiment.
• a cooling device 6 which has a blowing-on means 7 for generating a cooling air flow.
• the blowing-on agent 7 cooperates with a cooling shaft 8, which extends directly below the spinneret 3 in the vertical direction, so that the extruded filaments 4 of a filament bundle 5 through the spinneret 1 pass through the cooling shaft 8.
• the blowing-on agent 7 is formed by a cross-flow coating which generates a cooling air flow, which is introduced laterally into the cooling shaft and is directed onto the filament bundle 5 from the outside. As a result, the filaments 4 extruded from the spinneret 3 are uniformly cooled.
• a collection thread guide 9 is provided below the cooling shaft 8.
• the collecting yarn guide 9 is arranged centrally below the spinneret 3 so that the filaments 4 in the collecting yarn guide 9 are brought together uniformly.
• the collection thread guide 7 is designed as a deflection roller 25. forms, to which extent the filaments 4 are deflected with contact.
• deflection rollers 25 preferably have a guide groove, which is formed on the circumference of the deflection roller 25 and facilitate a merging of the filaments.
• a draw-off godet 10 and a draw godet 11 interacting with the draw-off godet 10 are arranged below the collecting yarn guide 9.
• the withdrawal godet 10 is arranged laterally next to the collection thread guide 9, wherein the filament bundle 5 is guided with a partial looping on a guide jacket 32 of the withdrawal godet 10.
• the guide shell 32 of the withdrawal godet 10 is driven by a godet drive 13.1 at a predetermined withdrawal speed.
• the guide shell 32 of the withdrawal godet 10 is unheated in this embodiment to guide the filament bundle in the cold state in a draw zone.
• a heating means in the form of a heating tube 14 is arranged between the withdrawal godet 10 and the draw godet 11.
• the heating tube 14 has an elongated treatment channel 15, through which the filament bundle 5 is guided.
• the heating tube 14 is formed heatable, so that sets a hot air atmosphere within the treatment channel 15.
• the filaments 4 of the fi lament bundle 5 are heated as they pass through the treatment channel 15 of the heating tube 14 to a filament temperature which is above the glass transition temperature of the filament material for triggering a point of insertion.
• the filament bundle is pulled out of the heating tube 14 by the draw godet 11.
• the guide shell of the draw godet 11 is for this purpose driven by a godet drive 13.2 with a stretching speed which is above the withdrawal speed of the withdrawal godet 10.
• a stretching speed of at least 4,000 m / min is set on the draw godet 11.
• a preparation device 16 is arranged between the heating tube 14 and the draw godet 11, the preparation device 16 generates a wetting on the filament bundle 5, so that a thread closure adjusts and the filament bundle 5 as a thread 33 is feasible.
• the wetting of the filament bundle 5 takes place with a preparation fluid which adheres uniformly to the surface of the filaments 4.
• the stretching galette 11 is followed by a swirling device 17, at which the thread 33 receives an intensive thread closure through the formation of interlacing knots.
• the Verwirbelungs worn 17 downstream of a redesigngalette 12, so that an advantageous for swirling the yarn 33 thread tension is adjustable.
• the process godet 12 can be used to set a desired differential speed in relation to the extension rail 11.
• the discoursegalette 12 is driven by the godet drive 13.3.
• a reeling device 18 is arranged, the reeling device 18 is formed in this embodiment by a so-called reel revolving machine, which has a rotatable spindle carrier 24 with two freely projecting winding spindles 22.1 and 22.2.
• the spindle carrier 24 is mounted in a machine frame 34.
• the winding spindles 22.1 and 22.2 can be guided alternately into an operating region for winding a coil and into a changing region for exchanging the coil.
• a traversing device 20 and a pressure roller 21 are provided to wind the yarn 33 to a coil 23.
• the pressure roller 21 contacts the surface of the coil 23 with contact.
• a head thread guide 19 is provided, through which the inlet of the thread is guided in the winding position.
• a polymer melt for example, of a polyester is used to produce a fully stretched thread or a polyamide fed to the spinning head 1.
• the polymer melt is pressed under pressure through the nozzle bores formed at the bottom of the spinneret 3 to extrude a plurality of filaments 4.
• the filaments 4 are cooled to a temperature below the glass transition temperature of the thermoplastic material by a flow of cooling air introduced via the blowing agent 7, so that solidification and preorientation occurs by thermal crystallization on the filaments 4 , After the filaments 4 have cooled, they are combined to form a filament bundle by contact with the collecting thread guide 9.
• the filament bundle 5 is pulled off after being collected in the dry state at a withdrawal speed of more than 1,500 m / min, and fed to a strands.
• the withdrawal speed is for this purpose determined by the Abzugsgalette 10, at the guide sheath, the filament bundle 5 is guided with a simple Operaumschlingung in the range of 90 °.
• the filament bundle 5 is guided in the spread state through the treatment channel 15 of the heating tube 14.
• the hot air atmosphere is adjusted to a temperature in the range from 120 0 C to 240 0 C, depending on the filament material and yarn denier within the treatment channel 15 °.
• the treatment channel 15 of the heating tube 14 in this case has a length which is in the range of 800 mm to 2,500 mm. This makes it possible, a sufficient heating of the filament bundle with the filaments 4 to a temperature above the glass transition temperature of the thermoplastic To obtain material.
• the glass transition temperature is, for example a polyester in the range of 80 0 C.
• the hot-air atmosphere within the treatment channel 15 of the heating tube 14 can in this case be generated by heating the heating tube 14 or by introducing a hot air into the treatment channel 15. It is essential here that the filaments 4 of the filament bundle 5 are guided without contact and are heated exclusively by the hot-air atmosphere.
• the filament bundle 5 is stretched at a stretching speed of above 3,500 m / min, preferably above 4,000 m / min.
• the stretching speed is generated in this exemplary embodiment by the downstream draw godet 11, on which a subsequent treatment in the form of a relaxation on the filament bundles 5 can be carried out at the same time.
• For relaxation of the guide jacket of the draw roll 11 is preferably heated to a surface temperature in the range of 100 to 180 0 C.
• Such aftertreatment can produce a further reduction in shrinkage within the thread 33, which has a positive effect on the coil construction of the bobbins, especially at fine titers.
• a preparation is carried out in order to form a thread closure of the filament bundles 5 and thus the thread 33.
• the filament bundle 5 is prepared for this purpose before casserole on the draw godet 11.
• additional devices may be provided in combination with the preparation device.
• the thread closure is further fixed by the swirling device 17, in which a plurality of merge nodes in the thread 33 are generated.
• a minimum number of 10 knots per running meter of thread length is generated in the FDY thread.
• the inventive method and the device according to the invention are characterized in particular by a low energy input in order to carry out a stretching of the thread.
• the dry filament bundle can be heated in a short time and with little energy to a stretching temperature, even at the usual high production speeds up to 6,000 m / min, and above.
• FIG. 2 schematically shows a further exemplary embodiment of the device according to the invention for carrying out the method according to the invention for producing a fully drawn yarn to form an FDY yarn.
• the exemplary embodiment is shown in a view in which a plurality of threads are spun, drawn and wound parallel to one another.
• the overall apparatus shown in Fig. 2 is substantially identical to the aforesaid embodiment of Fig. 1 in relation to the treatment of a thread, so that reference is made to the preceding description at this point and only the differences are explained below substantially.
• the spinning head 1 on its underside a plurality of spinnerets 3, which are held side by side in a row-like arrangement.
• the spinnerets 3 are connected to the melt inlet 2, wherein each spinneret 3 is associated with a spinning pump, not shown here.
• the number of spinnerets held in a spinning position is exemplary. In principle, more than four spinnerets within a spinner 1 can be kept side by side.
• a cooling shaft 8 is formed, which cooperates with a blowing agent 7.
• each spinneret 3 is assigned below the cooling shaft 8, a collection yarn guide 9, which are also formed in this embodiment, each by a guide roller 25.
• a withdrawal godet 10 is arranged on the side next to the collecting thread guides 9 .
• the withdrawal godet 10 has a guide casing 32, which contains a plurality of peripheral guide grooves 26 at its circumference.
• a filament bundle 5 is guided in each case.
• the guide casing 32 is rotated by the godet drive 13.1 at a take-off speed in the range of above 1,500 m / min. driven.
• the filament bundles 5 can be pulled off together from the spinnerets 3 and from the spinning zone.
• the heating box 28 contains per filament bundle 5 each have a heating tube 14 with a treatment channel 15, so that the filament bundles 5 are independently heated by separate treatment channels 15.
• the heating box 28 is formed to form the heating tubes 14 in two parts from a support plate 29 and a cover plate 30.
• the cover plate 30 is pivotally mounted on the support plate 29.
• the heating tube 14 is also formed in two parts, wherein a stationary part of the support plate 29 is assigned and a movable part is connected to the cover plate 30. By opening the cover plate 30 thus all treatment channels of the heating tubes 14 can be opened.
• This design of the heating box 28 is particularly advantageous in order to insert the filament bundles 5 into the individual treatment channels 15 at the beginning of the process.
• the treatment channels 15 in the open state of the cover plate 30 within the heating box 28 can be easily cleaned.
• the collecting thread guides 9 it is also possible to assign the collecting thread guides 9 a switchable preparation device which applies a preparation fluid to the filaments 4 only in the phase in which the filament bundles 5 are applied. After the threading and application of the filament bundles has taken place, the preparation device associated with the collecting thread guides 9 is switched off, so that the filament bundles 5 are removed from the withdrawal web 10 in the dry state.
• the heating box 28 is vertically aligned, arranged below the withdrawal godet, so that there is a substantially vertically oriented draw zone.
• a preparation device 16 is arranged, through which the filament bundles 5 are brought together in each case to form a thread 3.
• the preparation device 16 has in each case a total of four wetting agents which are assigned to the filament bundles 5.
• a process godet 12 is held on an end face of the take-up device 18.
• the demandinggalette 12 is coupled to the drive 13.3.
• a swirling device 17 is arranged in the tensioned thread piece to swirl the threads 33 parallel to each other in each individual swirling channels to form interlacing knots.
• each head thread guide 19 are assigned in the winding positions of the take-up, which are formed by freely rotatable distributor rollers 35.
• the running of the ceremonigalette 12 threads 33 can be deflected out of a substantially horizontal Vermaschinebene out to the winding points.
• Spreading the threads to the winding points, as would be carried out, for example, in an arrangement according to FIG. 1, can be avoided thereby.
• the winding device 18 is substantially identical to the embodiment of FIG. 1, wherein the winding spindles 22.1 and 22.2 wind four threads simultaneously to form coils.
• the exemplary embodiment illustrated in FIG. 2 is also suitable for carrying out the method according to the invention for producing an FDY thread.
• the godets for pulling off, stretching and guiding the filament bundle and the thread are each partially wrapped, wherein in particular the deduction area has circumferential guide grooves for guiding the filament bundle.
• FIG. 3 schematically shows a further exemplary embodiment of the device according to the invention for carrying out the method according to the invention in a view.
• the exemplary embodiment is essentially identical to the exemplary embodiment according to FIG. 2, so that reference is made to the aforementioned descriptions and only the differences will be explained below.
• the blowing-on agent 7 for cooling the filaments 4 is formed by a blow candle 31.
• each spinneret 3 is associated with a blow candle 31 which is held concentrically to the spinneret 3, so that a cooling air flow generated from the jacket of the blow candle 31 flows through the filaments 4 from the inside to the outside.
• the further devices for drawing off and stretching the filament bundles are identical to the exemplary embodiment according to FIG. 2.
• the heating box 28 with the heating tubes is arranged in a horizontal orientation below the cooling shaft 8 that a large wrap angle of the filament bundles in the range of 180 ° can be realized on the withdrawal godet 10. This can generate greater pull-off forces and stretching forces.
• the draw godet 11 is arranged in this embodiment opposite to the withdrawal godet 10 below the cooling shaft 8. This results a very compact draw zone which extends parallel to the spinneret row of spinnerets 3.
• the exemplary embodiment illustrated in FIG. 3 is particularly suitable for carrying out the method according to the invention with a very compact arrangement of the devices for a plurality of threads.

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

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• 2009
  • 2009-08-06 CN CN200980133096.6A patent/CN102131965B/zh not_active Expired - Fee Related
  • 2009-08-06 WO PCT/EP2009/060246 patent/WO2010023081A1/de active Application Filing
  • 2009-08-06 JP JP2011524303A patent/JP5523462B2/ja not_active Expired - Fee Related
  • 2009-08-06 AT AT09781588T patent/ATE541965T1/de active
  • 2009-08-06 EP EP09781588A patent/EP2318577B1/de not_active Not-in-force

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