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
  • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
• • 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
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/098—Melt spinning methods with simultaneous stretching
• • 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
• • 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
  • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
  • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll

Definitions

• the invention relates to a method for stripping and drawing a synthetic thread into a fully drawn yarn (FDY) according to the preamble of claim 1 and to an apparatus for carrying out the method according to FIG
• FDY fully drawn yarn
• the multifilament yarns are more or less stretched after melt-spinning, depending on the types of yarn to be produced.
• POY yarns or FDY yarns so-called POY yarns or FDY yarns.
• the POY yarns Pre Oriented Yarn
• FDY yarns Füll Drawn Yarn
• the drawing of the synthetic threads is carried out by driven guide shells of several godets, wherein the threads are guided with contact on the circumference of the guide shells.
• the guide shells of the godets are at least partially heated to heat the threads for stretching or relaxation. Since, on the one hand, high draws require correspondingly high differential speeds between the guide sheaths of the godets and, on the other hand, the heating of the yarns takes place through contact with the heated guide shells, large contact lengths between the yarn and the guide sheath for heating the yarns are required at high speeds. For this reason, usually godet duos are used to pull and stretch synthetic threads into fully drawn yarns, two of which are of identical circumference.
• each of the godet towers has two driven guide shells on which the thread is guided with several wraps.
• the guide coats of one of the godet duo cooperate to perform on the thread a thermal treatment and to pull the thread from its spinning zone or stretch in a draw zone.
• the number of wraps on the guide shells are chosen in relation to the speeds such that after the thread from the guide sheath, the desired stretching temperature is reached. In principle, however, any contact between the thread and a ceremoniessfiambae to rubbing effects that can cause unevenness in the individual filaments due to the multiglaen structure of the thread.
• Radiation heater is done.
• a Described method and apparatus for pulling and stretching a multiglaen thread in which or which the thread is guided with simple wrapping on the guide shells of the godets.
• free treatment zones are formed, which are used for heating the thread by radiant heater.
• Such methods and apparatus thus require greater free guide paths of the yarn to allow for sufficient temperature control at high speeds.
• Another object of the invention is to provide a method and a device of the generic type, with which a heat treatment and drawing on the smallest possible space is executable.
• the invention is based on the finding that even the type of thread guide in synthetic threads for textile applications with fine titres has an influence on the heating of the thread.
• the godet duo with two driven and heated Stanfordssinn are basically repeatedly wrapped with the same Umschlingungssinn of the threads.
• This type of thread guide causes the multifilament thread a Inside and has an outer side, so that the arranged on the inside of the thread filament strands are repeatedly performed on the heated surface of the guide shells of the godet dome. Heating of the filament strands of the filament lying on the outside is thus effected exclusively by heat transport within the filament bundle.
• the invention now has the particular advantage that the yarn is heated uniformly on both sides of the guide sheaths of the godet godet.
• the thread for removal from a spinning zone and before stretching out by a first pair of godets with two oppositely driven guide shells in an S-shaped or Z-shaped yarn path.
• a high uniformity of the heating of the filaments of the thread and on the other hand a relatively short contact length can be realized at high speeds of the guide shells.
• the history of the filaments of the thread can thus be substantially equalized.
• both the filament strands on the inside and also on the outside of the thread alternately come into contact with the heated surface of one of the guiding shells.
• the device according to the invention for carrying out the method according to the invention has a pair of godets in which the drives of the guide shells are formed by two electric motors with different directions of rotation and drive the guide shells at identical peripheral speeds.
• the guide shells can work together optimally to pull the thread or even several parallel juxtaposed threads from a spinning zone.
• the development of the invention is particularly advantageous in which the thread on the leaders of the godets each with a single Detailumschlingung with a Umschlin - Guidance angle of at least 180 ° is performed.
• the thread on the leaders of the godets each with a single Operaumschlingung with a Umschlin - Guidance angle of at least 180 ° is performed.
• the heating is tuned to the respective thread material to reach depending on the type of polymer in the region of uniformly flowing stretching, so that a uniform molecular structure can form during stretching.
• the development of the invention is preferably used, in which the two guide shells of the first godet to the same surface temperature or heated to uneven surface temperatures for heating the yarn before stretching.
• This effect is provided in particular also for the thermal aftertreatment after the drawing of the thread, so that according to an embodiment of the invention for heating the thread after being drawn, the two guiding coats of the second godet tail are heated to an equal surface temperature or to unequal surface temperatures.
• the device according to the invention preferably has a separate heating device for each guide casing, which can be controlled independently of one another by a plurality of control devices for setting a surface temperature on the respective guide casing.
• one of the guide sheaths preferably the guide sheath of the godet duo downstream in the course of the yarn, for example by the tempered ambient air prevailing inside a godet box.
• the separate heating of the guide shells to produce different surface temperatures is also particularly advantageous in order to obtain a uniform heating of all filaments on one of the godets at different contact lengths between the thread and the guide sheath and at the same guide speeds of the two guide shells.
• the surface temperature of the Guide sleeve with a smaller outer diameter set higher.
• the differences in diameter in the leadership coats of one of the godets can be used simultaneously to set a speed difference.
• the device variant is selected for carrying out the method, in which the guide shells of one of the godet duo to form the same contact lengths between the thread and guide sheath have an identical outer diameter at the same size Clausumschlingung.
• the contact lengths can also be varied by different Generalumschlingungen on the guide shells.
• the method variant is particularly advantageous in which the thread in a dry state or in a wetted state with a low water content of ⁇ 20% preferably ⁇ 10% deducted becomes.
• the heat energy provided on the surface of the guide shell is used directly for heating the thread material.
• the uniformity of the filaments based on the thread length can be optimized by the process variant, in which the filaments of the thread are guided before a first contact with the guide means in a band-shaped arrangement.
• all of the filaments combined in a thread can come into direct contact with the guide shells of the godet duo, so that each of the filaments receives a substantially similar history of heating and surface contact.
• the device according to the invention has a guide means, which is arranged upstream of the first pair of godets in the yarn path and through which the filaments of the yarn can be converted into a band-shaped arrangement.
• the method variant is provided, in which the thread is provided on the circumference of the guide sheaths of the first godet tail with a peripheral speed of the guide sheaths in the range of 1,200 m / min to 3,500 m / min the guide shells of the second Galettenduos with a peripheral speed of the guide shells in the range of 3,500 m / min, up to 6,000 m / min, is performed.
• This makes it possible to produce all common types of polymer with different thread titers to one FDY yarn each.
• the method according to the invention can be further improved in that the thread is additionally heated contactlessly by infrared rays.
• This additional heating can be carried out both before stretching and after the drawing of the thread, for which purpose preferably free thread sections are used.
• Fig. 1 shows schematically a godet assembly of a first embodiment of the device according to the invention for carrying out the method according to the invention
• FIG. 2 is a schematic cross-sectional view of a godet in accordance with the embodiment of FIG. 1
• Fig. 3 shows schematically another godet arrangement of a further exemplary embodiment of the device according to the invention
• Fig. 4 shows schematically a view of a spinning system with an exemplary embodiment of the device according to the invention
• the embodiment is formed by two Galettenduos 1.1 and 1.2, which are arranged side by side.
• the first pair of godets 1.1 has two guide shells 2.1 and 2.2 driven at the same peripheral speed.
• the guide shells 2.1 and 2.2 of the godet dome 1.1 are arranged one above the other and are each driven by the separate electric motors 3.1 and 4.1.
• the electric motor 3.1 of the guide casing 2.1 is designed left-handed and drives the guide casing 2.1 in the counterclockwise direction.
• the electric motor 4.1 is designed to rotate clockwise and drives the guide casing 2.2 in a clockwise direction.
• the electric motors 3.1 and 4.1 are preferably operated by a common engine control unit.
• Each of the guide sheaths 2.1 and 2.2 has a heater, not shown here, to heat the guide sheaths 2.1 and 2.2.
• the guide casing 2.1 is heated to a surface temperature Ti and the guide casing 2.2 to a surface temperature T 2 .
• the second galette duo 1.2 is in this case identical to the first galette duo
• the electric motor 3.2 is designed left-handed and drives the guide sheath 2.3 in the counterclockwise direction.
• the electric motor 4.2 is dextrorotatory. guides and drives the guide sheath 2.4 in a clockwise direction.
• both guide sheaths 2.3 and 2.4 of the godet 1.2 are also driven in opposite directions, the electric motors 3.2 and 4.2 are preferably operated by an engine control unit.
• Each of the guide sheaths 2.3 and 2.4 is also assigned a separate heating device (not shown here), so that the guide sheaths 2.3 and 2.4 could be heated at different temperatures.
• the guide casing 2.3 has a surface temperature T3 and the guide casing 2.4 has a surface temperature T 4 .
• a yarn 5 is first stripped off from the guide casing 2.1 of the godet dome 1.1 and guided in an S-shaped yarn path around the guide casing 2.1 and the adjacent guide casing 2.2.
• the thread 5 is guided with a single loop so first with an inner side of the guide casing 2.1 with contact and then guided by changing the wrapper with its outside on the surface of the guide casing 2.2 with contact.
• the inner and outer filaments in the thread 5 can be brought into contact alternately directly with the heated surface of the guide sheaths 2.1 and 2.2.
• the guide shells 2.1 and 2.2 are designed with an equal outside diameter, the arrangement of the godet godets 1.1 and 1.2 is selected so that the wrap angle of the thread 5 to the guide shells 2.1 and 2.2 each exceeds a value of 180 °.
• the wrap angle is indicated in Fig. 1 with the code letter ⁇ .
• different angles of wrap can be formed on the guide sheaths 2.1 and 2.2 depending on the godet arrangement.
• a Z-shaped wrapping of the guide shells 2.1 and 2.2 would also be possible.
• the guide shells 2.1 and 2.2 are heated in this embodiment with the same surface temperatures.
• the surface temperature Ti guide sheath 2.1 is equal to the surface temperature T 2 of the guide sheath 2.2 and could be in the range of 60 0 C to 200 0 C.
• the second pair of godets 1.2 is arranged laterally next to the first pair of godets 1.1, wherein the thread 5 is guided after the expiration of the guide casing 2.2 directly to the lower guide casing 2.3 of the godet dome 1.2.
• a draw zone is formed in which the multifilament yarn 5 is stretched.
• the guide sheath 2.3 and 2.4 of the second godet godet 1.2 is driven at a higher peripheral speed than the guide shells 2.1 and 2.2 of the first godet 1.1.
• the thread 5 is guided around with S-shaped wrap around the guide sheaths 2.3 and 2.4 of the second godet, so that the thread 5 can be guided overall with simple looping in the godet arrangement. This makes very compact and short leadership coats in the godet duo 1.1 and 1.2 executable.
• the godet duo 1.2 is constructed substantially identical to the godet duo 1.1, so that the guide sheaths 2.3 and 2.4 have an equal outside diameter. However, there is also the possibility of Riebsnavloom by different outer diameter of the guide sheaths 2.3 and 2.4 to obtain a desired post-treatment of the thread speed difference on the godet duo 1.2. Regardless of the size of the outer diameter is formed on each of the guide sheaths 2.3 and 2.4, a wrap angle ⁇ , which usually exceeds the value of 180 °.
• the guide casings are heated to a surface temperature in the range of 80 to 200 0 C 2.3 and 2.4.
• the surface temperatures T3 of the guide casing 2.3 and the surface temperature T 4 of the guide casing 2.4 are set at the same level. In principle, however, it is also possible here to form different surface temperatures on the guide sheaths 2.3 and 2.4 in order to compensate, for example, contact lengths between the thread and the guide sheaths. As a rule, the surface temperatures of the guide sheaths 2.3 and 2.4 are set higher than the surface temperatures of the guide sheaths 2.1 and 2.2. This is due to the fact that different temperatures are required to trigger certain yarn-specific processes and that, of course, the peripheral speeds of the guide sheaths 2.3 and 2.4 are significantly higher than the guide speeds of the guide sheaths 2.1 and 2.2 and thus realize different residence times.
• the godet duo 1.1 is preferably driven at a guide speed in the range of 1,200 m / min, up to 3,500 m / min.
• the second pair of godets 1.2 is at a guide speed in the range of 3,500 to 6,000 m / min.
• Fig. 2 is a cross-sectional view of a Galettenduos is shown schematically, as it would be used for example as Galettenduo 1.1 or as Galettenduo 1.2 in the embodiment of FIG. In this case, the godet duo 1.1 is shown.
• the godet duo 1.1 is held on a machine frame 6.
• two godet 11.1 and 11.2 are arranged at a distance to each other on the machine frame 6, where the guide shells 2.1 and 2.2 are rotatably supported.
• the structure of the guide shells 2.1 and 2.2 is identical, so that in Fig. 2 only the guide casing 2.1 is shown in a cross-sectional view.
• the guide casing 2.1 is connected to a drive shaft 8, which is driven by the electric motor 3.1.
• the guide casing 2.1 is formed as a hollow cylinder and slipped in his coat over a heater 7.1.
• the heating device 7.1 which may for example be formed by an induction coil, is held on a heating carrier 10 and is electrically connected to an external control device 9.1.
• the control unit 9.1 it is possible in each case to set a desired surface temperature on the guide casing 2.1.
• the sensors provided for controlling and monitoring the surface temperature are not shown in this embodiment.
• the godet pair 1.1 thus has two control units 9.1 and 9.2 in order to independently control and regulate the connected heating devices 7.1 and 7.2 of the associated guide shells 2.1 and 2.2.
• the left-handed electric motors 3.1 and the right-handed electric motor 4.1 are operated to drive the guide shells 2.1 and 2.2 together via an engine control unit 35 with the same drive speeds. With the same outer diameters of the guide sheaths 2.1 and 2.2, they are driven with identical peripheral speeds.
• the electric motors 3.1 and 4.1 of the godet dome 1.1 are connected to the engine control unit 35.
• the structural design of the godet duo according to FIG. 2 is exemplary.
• other design principles for driving and heating a guide jacket can also be used.
• heating of at least one of the guide shells is also passively possible by heat convection and heat radiation from the outside.
• the godet duos are arranged in a godet box in order to avoid in particular heat losses.
• the heat energy arising within the godet box due to an actively heated guide jacket could be used to warm up the adjacent non-actively heated guide jacket.
• additional heat sources such as to arrange an infrared radiator, which directly heats a thread or the thread on the surface of the guide shell.
• the method according to the invention and the device according to the invention can therefore also be operated in such a variant, in which one of the guide shells of the godet duo is movably held between the guide sheaths in order to change the free course of the thread.
• the degree of looping and thus the contact lengths between the thread and the guide casing can be influenced by the mobility of the guide casing.
• the invention is therefore very flexible usable to produce a FDY yarn.
• FIG. 3 shows a further exemplary embodiment of a godet arrangement in order to be able to carry out the method according to the invention.
• the godet duos 1.1 and 1.2 are arranged one below the other.
• the structure of the godets and 1.1 and 1.2 is identical to the embodiment of FIG. 1, so that at this point reference is made to the above description and then only the differences will be explained.
• the first godet pair 1.1 is preceded by a guide means 12 in the yarn path.
• the leadership Middle 12 is formed in this embodiment by two pulleys 13.1 and 13.2, which are freely rotatably mounted.
• the thread 5 is guided in each case with a partial looping to the deflection rollers 13.1 and 13.2, whereby the filaments of the thread 5 go into a band-shaped arrangement.
• the thread 5 is guided with band-shaped arrangement of the filaments to the guide casing 2.1 of the first godet 1.1.
• the guide shells 2.1 and 2.2 of the first godet godet 1.1 are driven at the same peripheral speed and opposite and are looped in an S-shape by the thread 5. Due to the band-shaped alignment of the filaments a high homogenization in the heating and the guidance of the thread is achieved.
• the arrangement of the godet duo 1.1 and 1.2 with each other forms an extended draw zone, which extends between the guide sheaths 2.2 and 2.3.
• the guide sheaths 2.3 and 2.4 of the second godet duo 1.2 are wrapped in this arrangement Z-shaped thread.
• the guide casing 2.3 is driven by a clockwise-rotating electric motor (not shown here) in a clockwise direction.
• the second guide shell of the second godet 1.2 is therefore driven by a counter-clockwise counterclockwise electric motor with the same peripheral speed.
• FIG. 4 shows an exemplary embodiment of the device according to the invention for carrying out the method according to the invention within a spinning system shown.
• a heated spinning beam 14 which carries a plurality of spinnerets 15 on its underside.
• the spinning beam 14 is aligned transversely to the plane of the drawing, so that in Fig. 4, only one of the spinnerets 15 is visible.
• Each of the spinnerets 15 has on its underside a plurality of nozzle openings, through which a polymer melt, for example, from a polyester or a polyamide is extruded into filaments 17.
• the spinnerets 15 are connected to a melt inlet 16.
• the melt inlet 16 is coupled to a melt source, not shown here, for example, to an extruder.
• Within the spinneret 14 further melt-leading and melting-promoting components may be arranged, which will not be discussed in detail at this point.
• a cooling device 18 is provided, which is formed by a cooling shaft 20 and a blowing device 19.
• the cooling shaft 20 is arranged below the spinnerets 15 such that the plurality of filaments 17 extruded through the spinnerets 15 pass through the cooling shaft 18.
• a cooling air flow can be generated, which is introduced into the cooling shaft 20, so that extruded filaments 17 are uniformly cooled by the spinning nozzles 15.
• a collection yarn guide 21 is provided to merge the filaments 17 into a yarn 5.
• the collecting yarn guide 21 is arranged centrally below the spinnerets 14, so that the filaments 17 are brought together uniformly in the collecting yarn guide 21.
• the device according to the invention for drawing the threads is arranged below a chute shaft 34 adjoining a cooling shaft 20, the device according to the invention for drawing the threads is arranged.
• the threads 5 are first brought to each other by the Einlauffaden investigating 22 at a treatment distance, so that the threads 5 parallel to each other with a short distance in the range of 3 to 8 mm on the guide shells 2.1 to 2.4 of the godets 1.1 and 1.2 to be performed.
• the structure of the godet dome 1.1 and 1.2 arranged below the chute 34 is identical to the previous one. mentioned embodiment of FIG. 1, so that no further explanation is given at this point.
• the electric motors of the godet towers 1.1 and 1.2 are controlled by two separate engine control units, so that a speed difference between the first godet duo 1.1 and the second godet duo 1.2 for drawing the yarns is adjustable.
• the guide sheaths 2.3 and 2.4 of the second godet channel 1.2 could have different outer diameters in order to obtain a small speed difference for a shrinkage treatment at the same drive speeds.
• a guide means 12 is arranged in the form of a thread brake, through which the filaments 17 of a thread 5 can be spread to a band.
• a preparation device 23 and a turbulizer 24 are arranged between a plurality of individual godets 25.1, 25.2 and 25.3.
• a thread closure is prepared by dissecting and swirling on the threads 5 before winding.
• a winding device 26 is provided, which has a rotatable spindle carrier 30 with two projecting winding spindles 29.1 and 29.2.
• the spindle carrier 30 is mounted in a frame 31.
• the winding spindles 29.1 and 29.2 can alternately lead into an operating range for winding a coil and into a change region for exchanging the coils.
• a traversing device 27 and a pressure roller 28 is provided to wind the threads 5 to a respective coil 33.
• each winding point is associated with a deflection roller 32, through which the inlet of the threads 5 is guided by the winding stations.
• the freshly extruded thread 5 is guided immediately after the melt spinning in the dry state of the filaments 17 to the godet dives 1.1 and 1.2 and stretched to form an FDY yarn.
• spin finish agents have been found to be suitable in which the water content is below 20%, preferably below 10%.

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

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• 2009
  • 2009-09-29 JP JP2012520914A patent/JP5562417B2/ja active Active
  • 2009-09-29 EP EP09783567A patent/EP2456912A1/de not_active Withdrawn
  • 2009-09-29 US US13/383,493 patent/US8881497B2/en active Active
  • 2009-09-29 CN CN200980159971.8A patent/CN102471935B/zh active Active
  • 2009-09-29 CN CN201510049864.7A patent/CN104630914A/zh active Pending
  • 2009-09-29 WO PCT/EP2009/062642 patent/WO2011009497A1/de active Application Filing

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