EP1102878B1 - Spinning device and method for spinning a synthetic thread - Google Patents

Spinning device and method for spinning a synthetic thread Download PDF

Info

Publication number
EP1102878B1
EP1102878B1 EP99938309A EP99938309A EP1102878B1 EP 1102878 B1 EP1102878 B1 EP 1102878B1 EP 99938309 A EP99938309 A EP 99938309A EP 99938309 A EP99938309 A EP 99938309A EP 1102878 B1 EP1102878 B1 EP 1102878B1
Authority
EP
European Patent Office
Prior art keywords
cooling tube
cooling
air
outlet
filaments
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99938309A
Other languages
German (de)
French (fr)
Other versions
EP1102878A1 (en
Inventor
Klaus Schäfer
Dieter Wiemer
Detlev Schulz
Hansjörg MEISE
Ulrich Enders
Hans-Gerhard Hutter
Peter Senge
Roland Nitschke
Gerhard Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
Saurer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saurer GmbH and Co KG filed Critical Saurer GmbH and Co KG
Publication of EP1102878A1 publication Critical patent/EP1102878A1/en
Application granted granted Critical
Publication of EP1102878B1 publication Critical patent/EP1102878B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
    • 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

Definitions

  • the invention relates to a spinning device for spinning a synthetic Thread according to the preamble of claim 1 and a method for Spinning a synthetic thread according to the preamble of claim 16.
  • the freshly extruded filaments are in led a cooling tube with a vacuum atmosphere.
  • the cooling tube is at a distance arranged to the spinneret so that there is an air flow for cooling the filaments in the cooling pipe in the direction of the thread.
  • the Air flow rate and spinning speed in such a way coordinated that the filaments in their movement in the cooling tube be supported by the air flow. This ensures that the The solidification point of the filaments moves away from the spinneret.
  • a delayed crystallization of the polymer which is beneficial to the physical properties of the thread affects. For example, at the production speed of a POY-Gams, and thus the Elongation can be increased without affecting the yarn Change the elongation values required for further processing.
  • the known spinning device consists of a cooling tube and a Suction device, which is arranged below the spinneret. Between the Spinneret and the cooling tube is an inlet cylinder with gas permeable Wall arranged. By the interaction of the inlet cylinder and the An amount of air is introduced into the suction shaft of the suction device and within the cooling tube into an accelerated air flow in Thread running direction.
  • the Filaments pre-cooled in such a way that by increasing the viscosity in the outer layers the strength of the surface layer increases.
  • the core of the filaments are when they enter the cooling tube, however, still molten, so that the final solidification only takes place in the cooling tube.
  • the cooling tube consists of a funnel-shaped one Inlet with a narrowest cross section in the cooling pipe and one directly subsequent cylindrical section. Through the narrowest cross section and that cylindrical section, the air flow is accelerated such that the filaments are supported in their movement and only delayed in the cooling pipe solidify.
  • the cooling tube is provided for generating an additional cooling flow, the however, before acceleration of the air flow in the cooling tube to a significant cooling of the filaments, so that the positive effect of delayed crystallization of the polymer is insufficient or insufficient effect.
  • a spinning device which below a spinneret a cooling device with an upper stage and a lower one Level.
  • a cooling shaft with an inner one, the filaments enclosing, gas-permeable wall.
  • the top and the bottom Cooling shafts are each connected to a blower, so that the gas-permeable A cooling air stream emerges from the walls, but this is mainly transverse to the direction of the thread the filaments flow.
  • a suction device is arranged at the outlet.
  • an additional cooling air flow in the thread running direction is not specifically targeted generated so that the cooling air flow inevitably leads to a significant Thread friction leads, which hinders the movement of the filaments.
  • the invention has the advantage that the entering at the inlet of the cooling tube Air flow is used only to delay the crystallization of the polymer. This ensures that the solidification point of the filaments is within of the cooling pipe.
  • the through the cooling air flow introduced into the air supply device is used. This is this Air supply device below the narrowest cross section of the inlet on cylindrical section or arranged below the outlet of the cooling tube. This ensures that the cooling air flow only shortly before or after the solidification Filaments meet the filament bundle. This affects in particular the Uniformity of the filament cross sections and leads to a high Spinning safety and lint-free.
  • the particularly preferred development of the spinning device according to claim 2 has the advantage that the cooling air flow is substantially uniform in the Cooling pipe enters. Since the air flow and the cooling air flow are rectified, turbulence is essentially avoided.
  • the air supply device can be easily by Form opening in the jacket of the cooling tube according to claim 3.
  • the one through the Cooling flow entering the cooling tube arises due to the Vacuum atmosphere in the cooling tube automatically.
  • the development of the invention according to claim 4 is characterized in that that the air stream entering at the inlet of the cooling tube and that through the Opening of cooling air flowing into the cooling pipe independently of each other are adjustable.
  • the air supply device has an air flow generator on, which generates the cooling air flow.
  • a blower can be used.
  • Airflow generator designed as an injector with a nozzle bore, which with is connected to a compressed air source.
  • the nozzle bore of the injector opens directly into the opening in the jacket of the cooling tube.
  • Such training the Spinning device is also particularly suitable to the at the start of the process Thread filaments into the cooling tube. With an angular range of 15 to 30 ° it is also achieved that the filament bundle in the area of the cooling air flow is held securely from the wall of the cooling pipe.
  • an adjusting device to change the free Flow cross section of the opening can be one on the cooling tube use attached housing sleeve, which to partial Closing the opening on the cooling tube is arranged movably.
  • the adjustment means consists of a Opening in the cooling tube from the outside enclosing air chamber that an inlet with a throttle device. Via the throttle device in the inlet the air supply to the air chamber can thus be controlled.
  • the opening made in the jacket of the cooling tube can at the Embodiments can be designed as a bore or as a radial cutout.
  • the Opening formed by an annular perforated plate in the jacket of the cooling tube.
  • the perforated plate extends over the entire circumference of the cooling tube. This ensures a uniform inflow of cooling air into the Cooling pipe guaranteed. Due to the large number of holes, one with little Turbulent flow creates.
  • the perforated plate is cone-shaped with increasing cross-section in the thread running direction and in Extension of the cooling tube is arranged on the outlet side of the cooling tube. This further intensifies the cooling of the filaments because of the expansion the air flow a better mixing between the cooling air flow and the Airflow takes place.
  • the particularly advantageous development of the invention according to claim 12 enables not only very intensive cooling but also pre-stretching of filaments. Due to the direction of the thread Cooling air flow on the filaments is opposite to the direction of the thread acting frictional force, which causes the filaments to stretch.
  • a second cooling pipe is an extension to the first cooling pipe directly at the outlet chamber of the suction device is closed.
  • the second cooling tube is preferably included a funnel-shaped inlet and with a cylindrical outlet air-permeable wall.
  • the cooling pipe could have a heating device.
  • the inventive method is particularly characterized in that textile Threads or technical threads made of polyester, polyamide or polypropylene with thick titers and high elongation values can be produced.
  • the process can be carried out with different treatment facilities be coupled so that, for example, fully stretched threads, pre-oriented threads or highly oriented threads can be produced.
  • Fig. 1 is a first embodiment of an inventive Spinning device shown for spinning a synthetic thread.
  • a thread 12 is spun from a thermoplastic material.
  • the Thermoplastic material is used in an extruder or a pump melted.
  • the melt is via a melt line 3 by means of a Spinning pump conveyed to a heated spinning head 1.
  • a spinneret 2 is attached at the bottom of the Spinning head 1.
  • the emerges from the spinneret 2 Melt in the form of fine filament strands 5.
  • the filaments 5 pass through a spinning shaft 6 as a bundle of filaments through a Inlet cylinder 4 is formed.
  • the inlet cylinder 4 is immediate for this arranged below the spinning head 1 and encloses the filaments 5.
  • Am Free end of the inlet cylinder 4 closes a cooling tube in the thread running direction 8 on.
  • the cooling tube 8 has an inlet 9 on the inlet side of the filaments
  • the inlet 9, which is preferably funnel-shaped, is with the Inlet cylinder 4 connected. In the narrowest cross section of the inlet 9, this shows Cooling tube 8 has a cylindrical section 32. At the end of the cylindrical In part 32, the cooling tube 8 has an outlet cone forming the outlet 33 10 on The outlet cone 10 opens into an outlet chamber 11. On the An air supply device 34 is arranged on the underside of the outlet chamber 11. The air supply device 34 consists of a further cooling pipe 35.
  • the second Cooling tube 35 is coaxial with the first cooling tube 8 on the underside of the Outlet chamber 11 attached.
  • the second cooling tube 35 has on the Inlet side a funnel-shaped inlet 36, which with the suction chamber 11th connected is.
  • At the free end of the second cooling tube 35 is a cylindrical outlet 37 formed with a gas-permeable wall.
  • the outlet has an outlet opening 13 through which the filaments 5 escape.
  • a suction port 14 opens into the Suction chamber 11.
  • the suction device 15 can for example be a vacuum pump or have a blower which has a negative pressure in the outlet chamber 11 and thus generated in the first cooling tube 8 and in the second cooling tube 35.
  • the outlet chamber 11 is between the outlet 33 of the first cooling tube 8 and the Inlet 36 of the second cooling tube 35 enclosing the filaments 5
  • Screen cylinder 30 arranged.
  • the screen cylinder 30 has an air permeable Wall on.
  • the Winding device 20 has a head thread guide 19.
  • the head thread guide 19 shows in the beginning of the traversing triangle, which is characterized by the back and forth Movement of a traversing thread guide of a traversing device 21 arises.
  • a pressure roller 22 is arranged below the traversing device 21.
  • the Pressure roller 22 lies against the circumference of a coil 23 to be wound.
  • the sink 23 is generated on a rotating winding spindle 24.
  • the winding spindle 24 will driven by the spindle motor 25.
  • the drive of the Sulspindel 25 is regulated here in dependence on the speed of the pressure roller such that the peripheral speed of the bobbin and thus the winding speed remains essentially constant during winding.
  • Treatment device 17 for treating the thread 12 interposed there is a between the preparation device 16 and the winding device 20 Treatment device 17 for treating the thread 12 interposed.
  • the treatment device 17 formed by a swirl nozzle 18.
  • Treatment facility one or more unheated or heated godets be arranged so that the thread is stretched before winding. As well there is the possibility of additional heating devices for stretching or To arrange relaxation within the treatment device 17.
  • a polymer melt is used for Spinning head 1 conveyed and through the spinneret 2 into a variety of filaments 5 extruded.
  • the bundle of filaments is drawn off the winding device 20.
  • the filament bundle passes through the with increasing speed Spinning shaft 6 within the inlet cylinder 4.
  • Filament bundles into the cooling tube 8 via the funnel-shaped inlet 9.
  • Cooling tube 8 a negative pressure is generated via the suction device 15.
  • the ambient air present at the inlet cylinder 4 into the Spinning shaft 6 sucked in.
  • the penetrating into the spinning shaft 6 The amount of air is proportional to the gas permeability of the wall of the Inlet cylinder 4.
  • the inflowing air leads to a pre-cooling of the Filaments so that the outer layers of the filaments solidify. At its core however, the filaments remain molten.
  • the amount of air is then over sucked the inlet 9 together with the filament bundle into the cooling tube 8.
  • the air flow is formed due to that at the end of the inlet 9 narrowest cross section and under the action of the suction device 15 such accelerates that no counteracting the filament movement in the cooling tube Air flow is more there.
  • the narrowest cross section is in the whole Area of the cylindrical portion 32 is formed. So that's it Acceleration distance within the cooling tube 8 by the length of the cylindrical portion 32 determined.
  • the cylindrical section can a length of a few millimeters up to 500 millimeters or more exhibit.
  • the air flow in the direction of the thread increases the load the filaments decreased.
  • the solidification point shifts from the spinneret path. This allows the relationship between the spinning speed and the Drawing in the manufacture of the thread can be influenced in such a way that despite high spinning speeds high elongation values can be achieved.
  • the filaments 5 are cooled.
  • an air supply device 34 is used additional cooling air flow generated.
  • the filaments pass through a second one Cooling tube 35, which is arranged below the first cooling tube 8.
  • the Outlet cone 10 of the first cooling tube and the funnel-shaped inlet 36 of the second cooling tube 35 both open into the outlet chamber 11.
  • the air flow from the cooling pipe 8 and the cooling air flow from the cooling pipe 35 are due the effect of the suction device 15 sucked into the outlet chamber 11 and pass through the screen cylinder 30 through the suction port 14 from the Outlet chamber 11 from. Then the entire air flow through the Suction device 15 removed.
  • the filaments 5 pass through on the outlet side of the cooling tube 35 Outlet opening 13 and run into the preparation device 16.
  • the filaments become a thread 12 merged.
  • the thread 12 is in front of the Winding swirled through a swirl nozzle 18.
  • the thread 12 is wound into the bobbin 23.
  • a polyester thread generated with a winding speed of> 7,000 m / min is wound up.
  • the spinning device shown in Fig. 1 is characterized by this that the amount of air entering the intake cylinder is delayed to the Heat treatment of the filaments is matched. It can be advantageous Pre-cooling and the delayed solidification of the filaments can be influenced.
  • the Final cooling of the filaments takes place in a second zone through the second Cooling tube 35 is formed.
  • the Air supply device 34 are supplemented by an air flow generator, which is based on the outlet side of the second cooling tube 35 could be connected.
  • FIG. 2 shows a further exemplary embodiment of an inventive device Spinning device shown, in which an air supply device 34 with a Air flow generator 38 is provided.
  • the spinning device shown in Fig. 2 differs from that 1 in the configuration of the air supply device 34. Therefore, for the description of the other components, the identical reference numerals received on the description of the embodiment of FIG. 1st Referred.
  • the air supply device 34 in the region of the cylindrical Section 32 of the cooling tube 8 is formed.
  • the cooling pipe 8 in Jacket of the cylindrical section 32 has an opening 39.
  • the opening 39 is formed by an annular perforated plate 40, which is in the jacket of the cylindrical portion 32 is inserted.
  • the opening 39 in the jacket of the cylindrical portion 32 is by an outside of the shell of the portion 32nd enclosed air chamber 42 included.
  • the air chamber 42 has one Inlet 41 on The inlet 41 is connected to an air flow generator 38.
  • an adjustable throttle 44 is arranged, through which the free Flow cross section of the inlet 41 is controllable.
  • Spinning device we the additional cooling air flow through the interaction the suction device 15 and the air flow generator 38 of the air supply device 34 formed.
  • the cooling air flow enters through the opening 39 in the Acceleration distance of the cooling tube 8.
  • the cooling air flow occurs over a variety of Perforations in perforated plate 40 into opening 39.
  • the cooling air flow and the Air flow mixes and flows in the thread running direction up to outlet 33 of the cooling tube 8.
  • the cooling air flow and the air flow enter Outlet chamber 11 and are through the suction nozzle 14 through the Suction device 15 removed.
  • the filament bundle is inside the cooling tube 8 cooled. That leaves on the underside of the outlet chamber 11 Filament bundle 5, the cooling section through an outlet opening 13. Then the filament bundle becomes the thread in the preparation device 16 merged.
  • the embodiment of the spinning device according to the invention shown in FIG. 2 is characterized in that despite the delayed cooling and thus the Relocation of the solidification point within the cooling tube an intensive Cooling can take place within the cooling tube.
  • the air flow entering the inlet 9 of the cooling tube 8 and the position of the Air supply device 34 on the cooling tube are matched in such a way that the cooling air flow just before or just after the solidification point of the filaments in the cooling tube 8 enters. This ensures a high level of uniformity in training the filament or thread is reached.
  • the air supply device 34 can also be local by a circumference limited opening can be formed. There is also the possibility of Air supply device 34 to run without air flow generator 38, so that directly the ambient air via the inlet 41 into the air chamber 42 due to the Effect of the suction device 15 can occur.
  • FIG. 3 shows a modification of the air supply device 34 as it is for example, could be used in the spinning device of FIG. 2.
  • the part of the opening 39, that is not covered by the housing sleeve 43 is in with the ambient air Connection. Due to the negative pressure atmosphere in the cooling pipe 8 will thus form an additional cooling air flow that over the free Flow cross-section of the opening 39 flows into the interior of the cooling tube 8.
  • the filaments 5 with the air flow drawn in on the inlet side of the cooling tube 8 applied, which delays the cooling of the filaments.
  • FIG. 4 is another embodiment of an air agitator 34 shown.
  • the spinning device is with the exemplary embodiment according to FIG. 2 identical. In this respect, reference is made to the description of FIG. 2.
  • the air supply device 34 is in the embodiment of FIG 4 is formed on the outlet side of the cooling tube 8.
  • the outlet cone 10 is formed with a gas-permeable wall.
  • the Opening 39 in the jacket of the cooling tube 8 thus extends from the end of the cylindrical portion 32 to the outlet 33.
  • the gas permeable wall of the The outlet cone 10 is within an air chamber enclosing the cooling tube 8 42 arranged.
  • the air chamber 42 has an inlet 41, which at the end with the Ambient air is connected. With an adjustable throttle 44 the free Flow cross section controlled by the inlet 41.
  • the Ambient air through the inlet 41 into the air chamber 42.
  • the Air chamber 42 gets the lust for the environment due to the negative pressure atmosphere inside the cooling tube through the air-permeable wall of the outlet cone 10. Due to the widening cross-section in the thread running direction there is a intensive mixing between the air flow accompanying the filaments and the cooling air flow entering from the side. There is an intense Cooling the filaments.
  • the cooling air flow and the air flow are over the Outlet chamber 11 and the suction nozzle 14 from the suction device 15 dissipated.
  • FIG. 5 shows a further exemplary embodiment of a cooling system Spinning device shown.
  • the air supply device is below the Inlets 9 in the area of the cylindrical section 32 from the cooling pipe 8 arranged.
  • the embodiment shown in FIG. 5 is identical to that in FIG. 2 shown execution. Thus, reference is made to the description Fig. 2.
  • the air supply device 34 from FIG. 5 has an opening 39 in the jacket of the Cooling tube 8, which is executed in the form of a bore. Furthermore there is the air supply device from an injector 45 and a compressed air source 47.
  • the compressed air source 47 is connected to a nozzle bore 46 of the injector 45.
  • the injector 45 and the compressed air source 47 act as an air flow generator and conduct a cooling air flow through the opening 39 into the interior of the cooling tube 8.
  • the nozzle bore 46 of the injector 45 is designed such that between the Center axis of the cooling tube and the nozzle bore an angle in Thread running direction of ⁇ 90 ° is formed. So that the cooling air flow in Thread running direction introduced into the interior of the cooling tube 8.
  • the design of the air supply device 5 in particular for threading the filaments at the start of the process proven.
  • the cooling air flow is accelerated with high acceleration initiated the interior of the cooling tube, which is due to the suction of Suction device 15 essentially in the central region of the pipe cross section propagates. This flow entrains the filaments and guides the bundle of filaments safely through the cooling tube 8.
  • a second or more Air supply devices can be arranged with an injector.
  • the air supply devices shown in FIGS. 2 to 4 each have annular openings that extend over the entire circumference of the cooling tube extend. However, it is also possible to only partially open the opening limit certain peripheral portion of the cooling tube. It can too several openings side by side and / or one behind the other on the jacket of the Be designed cooling tube. By designing the openings or by Inserting pore-shaped walls, such as the perforated plate, can the flow of the cooling air flow substantially without major turbulence cause to flow into the interior of the cooling tube. With the one shown in Fig. 4 Embodiment of the air supply device is a particularly low turbulence Flow for cooling the filaments creates what the spinning security or Smooth running of the thread increased.
  • the invention is not based on a specific shape of the cooling tube limited.
  • the cylindrical shapes shown in the explanations are exemplary and can easily with an oval training or at Use of rectangular nozzles even through an angular formation of the Cooling tube to be replaced.
  • the cylindrical section of the cooling tube very short perform.
  • the cooling pipe consists of only one inlet cone, see above that the air supply device according to the embodiment of Figure 2 in Area of the outlet cone 10 would be attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Description

Die Erfindung betrifft eine Spinnvorrichtung zum Spinnen eines synthetischen Fadens gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Spinnen eines synthetischen Fadens gemäß dem Oberbegriff des Anspruchs 16.The invention relates to a spinning device for spinning a synthetic Thread according to the preamble of claim 1 and a method for Spinning a synthetic thread according to the preamble of claim 16.

Diese Spinnvorrichtung und das Verfahren sind aus der EP 0682720 bekannt.This spinning device and the method are known from EP 0682720.

Bei der bekannten Spinnvorrichtung werden die frisch extrudierten Filamente in ein Kühlrohr mit Unterdruckatmosphäre geführt. Das Kühlrohr ist mit Abstand zur Spinndüse angeordnet, so daß sich ein Luftstrom zur Kühlung der Filamente in Fadenlaufrichtung im Kühlrohr ausbildet. Hierbei ist die Strömungsgeschwindigkeit der Luft und die Spinngeschwindigkeit derart aufeinander abgestimmt, daß die Filamente in ihrer Fortbewegung im Kühlrohr durch den Luftstrom unterstützt werden. Damit wird erreicht, daß der Erstarrungspunkt der Filamente sich von der Spinndüse wegbewegt. Damit einher geht eine verzögerte Kristallisation des Polymers, die sich günstig auf die physikalischen Eigenschaften des Fadens auswirkt. So konnte beispielsweise bei der Herstellung eines POY-Gams die Abzugsgeschwindigkeit und damit die Verstreckung erhöht werden, ohne daß sich für das Garn die für die Weiterverarbeitung erforderlichen Dehnungswerte verändern.In the known spinning device, the freshly extruded filaments are in led a cooling tube with a vacuum atmosphere. The cooling tube is at a distance arranged to the spinneret so that there is an air flow for cooling the filaments in the cooling pipe in the direction of the thread. Here is the Air flow rate and spinning speed in such a way coordinated that the filaments in their movement in the cooling tube be supported by the air flow. This ensures that the The solidification point of the filaments moves away from the spinneret. Along with it there is a delayed crystallization of the polymer, which is beneficial to the physical properties of the thread affects. For example, at the production speed of a POY-Gams, and thus the Elongation can be increased without affecting the yarn Change the elongation values required for further processing.

Die bekannte Spinnvorrichtung besteht aus einem Kühlrohr und einer Saugeinrichtung, die unterhalb der Spinndüse angeordnet ist. Zwischen der Spinndüse und dem Kühlrohr ist ein Einlaßzylinder mit gasdurchlässiger Wandung angeordnet. Durch das Zusammenwirken des Einlaßzylinders und der Saugeinrichtung wird eine Luftmenge innerhalb des Spinnschachtes eingeleitet und innerhalb des Kühlrohres zu einem beschleunigten Luftstrom in Fadenlaufrichung geführt. Beim Durchlaufen des Einlaßzylinders werden die Filamente derart vorgekühlt, daß durch Viskositätserhöhung in den Randschichten die Festigkeit der Randschicht zunimmt. Im Kern sind die Filamente bei Eintritt in das Kühlrohr jedoch noch schmelzeflüssig, so daß die endgültige Erstarrung erst im Kühlrohr erfolgt. Hierzu besteht das Kühlrohr aus einem trichterförmigen Einlaß mit einem engsten Querschnitt im Kühlrohr und einem direkt anschließenden zylindrischen Teilstück. Durch den engsten Querschnitt und das zylindrische Teilstück wird der Luftstrom derart beschleunigt, daß die Filamente in ihrer Fortbewegung untestützt werden und erst im Kühlrohr verzögert verfestigen. Bei größeren Filamenttitern tritt jedoch nun das Problem auf, daß der im Kühlrohr eintretende Luftstrom zwar die Fortbewegung der Filamente unterstützt, jedoch nicht zu einer ausreichenden Kühlung der Filamente führt. Bei der bekannten Spinnvorrichtung ist zwar eine Luftzufuhreinrichtung am Einlaß des Kühlrohres zur Erzeugung eines zusätzlichen Kühlstroms vorgesehen, die jedoch bereits vor Beschleunigung des Luftstroms im Kühlrohr zu einer erheblichen Abkühlung der Filamente führt, so daß sich der positive Effekt von einer verzögerten Kristallisation des Polymers nicht oder nur unzureichend auswirkt.The known spinning device consists of a cooling tube and a Suction device, which is arranged below the spinneret. Between the Spinneret and the cooling tube is an inlet cylinder with gas permeable Wall arranged. By the interaction of the inlet cylinder and the An amount of air is introduced into the suction shaft of the suction device and within the cooling tube into an accelerated air flow in Thread running direction. When passing through the inlet cylinder, the Filaments pre-cooled in such a way that by increasing the viscosity in the outer layers the strength of the surface layer increases. The core of the filaments are when they enter the cooling tube, however, still molten, so that the final solidification only takes place in the cooling tube. For this purpose, the cooling tube consists of a funnel-shaped one Inlet with a narrowest cross section in the cooling pipe and one directly subsequent cylindrical section. Through the narrowest cross section and that cylindrical section, the air flow is accelerated such that the filaments are supported in their movement and only delayed in the cooling pipe solidify. With larger filament titles, however, the problem arises that the Airflow entering the cooling tube does indeed keep the filaments moving supports, but does not lead to sufficient cooling of the filaments. at the known spinning device is indeed an air supply device at the inlet the cooling tube is provided for generating an additional cooling flow, the however, before acceleration of the air flow in the cooling tube to a significant cooling of the filaments, so that the positive effect of delayed crystallization of the polymer is insufficient or insufficient effect.

Weiterhin ist aus der US 5,173,310 eine Spinnvorrichtung offenbart, die unterhalb einer Spinndüse eine Kühleinrichtung mit einer oberen Stufe und einer unteren Stufe aufweist. In jeder Stufe ist ein Kühlschacht mit einer inneren, die Filamente umschließenden, gasdurchlässigen Wand ausgebildet. Der obere und der untere Kühlschacht sind jeweils an ein Gebläse angeschlossen, so daß aus den gasdurchlässigen Wänden ein Kühlluftstrom austritt, der aber hauptsächlich quer zur Fadenlaufrichtung der Filamente strömt. Am Auslaß ist eine Saugeinrichtung angeordnet. Es wird jedoch nicht gezielt ein zusätzlicher Kühlluftstrom in Fadenlaufrichtung erzeugt, so dass der Kühlluftstrom zwangsläufig zu einer erheblichen Fadenreibung führt, wodurch die Fortbewegung der Filamente behindert wird.Furthermore, from US 5,173,310 a spinning device is disclosed, which below a spinneret a cooling device with an upper stage and a lower one Level. In each stage there is a cooling shaft with an inner one, the filaments enclosing, gas-permeable wall. The top and the bottom Cooling shafts are each connected to a blower, so that the gas-permeable A cooling air stream emerges from the walls, but this is mainly transverse to the direction of the thread the filaments flow. A suction device is arranged at the outlet. However, an additional cooling air flow in the thread running direction is not specifically targeted generated so that the cooling air flow inevitably leads to a significant Thread friction leads, which hinders the movement of the filaments.

Demgemäß ist es Aufgabe der Erfindung, die eingangs genannte Spinnvorrichtung und das eingangs genannte Verfahren derart weiterzubilden, daß Filamente mit größeren Titern auch bei verzögerter Kristallisation des Polymers und hohen Spinngeschwindigkeiten auf kurzer Strecke ausreichend gekühlt werden.Accordingly, it is an object of the invention, the spinning device mentioned and to further develop the aforementioned method in such a way that filaments with larger titers even with delayed crystallization of the polymer and high ones Adequate cooling of spinning speeds over a short distance.

Diese Aufgabe wird erfindungsgemäß durch eine Spinnvorrichtung mit den Merkmalen des Anspruchs 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 16 gelöst.This object is achieved by a spinning device with the Features of claim 1 and by a method with the features of Claim 16 solved.

Die Erfindung besitzt den Vorteil, daß der am Einlaß des Kühlrohres eintretende Luftstrom ausschließlich zur Verzögerung der Kristallisation des Polymers dient. Damit ist gewährleistet, daß der Erstarrungspunkt der Filamente sich innerhalb des Kühlrohres befindet. Zur weiteren Abkühlung der Filamente wird der durch die Luftzufuhreinrichtung eingebrachte Kühlluftstrom genutzt. Hierzu ist diese Luftzuführeinrichtung unterhalb des engsten Querschnittes des Einlasses am zylindrischen Teilstück oder unterhalb des Auslasses des Kühlrohres angeordnet. Damit wird erreicht, daß der Kühlluftstrom erst kurz vor oder nach Erstarrung der Filamente auf das Filamentbündel trifft. Dies wirkt sich insbesondere auf die Gleichmäßigkeit der Filamentquerschnitte aus und führt zu einer hohen Spinnsicherheit und zu Flusenfreiheit.The invention has the advantage that the entering at the inlet of the cooling tube Air flow is used only to delay the crystallization of the polymer. This ensures that the solidification point of the filaments is within of the cooling pipe. For further cooling of the filaments, the through the cooling air flow introduced into the air supply device is used. This is this Air supply device below the narrowest cross section of the inlet on cylindrical section or arranged below the outlet of the cooling tube. This ensures that the cooling air flow only shortly before or after the solidification Filaments meet the filament bundle. This affects in particular the Uniformity of the filament cross sections and leads to a high Spinning safety and lint-free.

Die besonders bevorzugte Weiterbildung der Spinnvorrichtung gemäß Anspruch 2 besitzt den Vorteil, daß der Kühlluftstrom im wesentlichen gleichmäßig in das Kühlrohr eintritt. Da der Luftstrom und der Kühlluftstrom gleichgerichtet sind, werden Turbulenzen im wesentlichen vermieden.The particularly preferred development of the spinning device according to claim 2 has the advantage that the cooling air flow is substantially uniform in the Cooling pipe enters. Since the air flow and the cooling air flow are rectified, turbulence is essentially avoided.

Hierbei läßt sich die Luftzufuhreinrichtung auf einfache Weise durch eine Öffnung im Mantel des Kühlrohres gemäß Anspruch 3 ausbilden. Der durch die Öffnung in das Kühlrohr eintretende Kühlstrom stellt sich aufgrund der Unterdruckatmosphäre im Kühlrohr selbstätig ein.Here, the air supply device can be easily by Form opening in the jacket of the cooling tube according to claim 3. The one through the Cooling flow entering the cooling tube arises due to the Vacuum atmosphere in the cooling tube automatically.

Die Weiterbildung der Erfindung gemäß Anspruch 4 zeichnet sich dadurch aus, daß der am Einlaß des Kühlrohres eintretende Luftstrom und der durch die Öffnung in das Kühlrohr eintretende Kühlluftstrom unabhängig voneinander einstellbar sind. Hierzu weist die Luftzufuhreinrichtung einen Luftstromerzeuger auf, welcher den Kühlluftstrom erzeugt. Als Luftstromerzeuger könnte beispielsweise ein Gebläse eingesetzt werden.The development of the invention according to claim 4 is characterized in that that the air stream entering at the inlet of the cooling tube and that through the Opening of cooling air flowing into the cooling pipe independently of each other are adjustable. For this purpose, the air supply device has an air flow generator on, which generates the cooling air flow. Could be as an airflow generator for example, a blower can be used.

Bei einer besonders vorteilhaften Weiterbildung der Spinnvorrichtung ist der Luftstromerzeuger als Injektor mit einer Düsenbohrung ausgeführt, welche mit einer Druckluftquelle in Verbindung steht. Die Düsenborhung des Injektors mündet hierbei direkt in der Öffnung im Mantel des Kühlrohres. Hierbei ist zwischen der Mittelachse des Kühlrohres und der Düsenbohrung ein spitzer Winkel in Fadenlaufrichtung ausgebildet, um den Kühlluftstrom gerichtet in Fadenlaufrichtung in das Kühlrohr einzuleiten. Eine derartige Ausbildung der Spinnvorrichtung ist insbesondere auch geeignet, um bei Prozeßbeginn die Filamente in das Kühlrohr einzufädeln. Bei einem Winkelbereich von 15 bis 30 ° wird zudem erreicht, daß das Filamentbündel im Bereich der Kühlluftströmung sicher von der Wandung des Kühlrohres abgehalten wird.In a particularly advantageous development of the spinning device Airflow generator designed as an injector with a nozzle bore, which with is connected to a compressed air source. The nozzle bore of the injector opens directly into the opening in the jacket of the cooling tube. Here is between the central axis of the cooling tube and the nozzle bore a sharp Angle formed in the thread running direction to the cooling air flow directed in Introduce the thread running direction into the cooling tube. Such training the Spinning device is also particularly suitable to the at the start of the process Thread filaments into the cooling tube. With an angular range of 15 to 30 ° it is also achieved that the filament bundle in the area of the cooling air flow is held securely from the wall of the cooling pipe.

Um den Kühlluftstrom in Abhängigkeit vom Filamenttyp und Filamenttiter einzustellen, ist die Ausbildung der Spinnvorrichtung gemäß Anspruch 6 besonders vorteilhaft. Als Verstellmittel zur Veränderung des freien Strömungsquerschnittes der Öffnung läßt sich hierbei eine am Kühlrohr angebrachte Gehäusemuffe verwenden, die zum teilweisen Verschließen der Öffnung am Kühlrohr bewegbar angeordnet ist.The cooling air flow depending on the filament type and filament titer adjust, the formation of the spinning device according to claim 6 particularly advantageous. As an adjusting device to change the free Flow cross section of the opening can be one on the cooling tube use attached housing sleeve, which to partial Closing the opening on the cooling tube is arranged movably.

Bei einer vorteilhaften Weiterbildung besteht das Verstellmittel aus einer die Öffnung im Kühlrohr von außen einschließenden Luftkammer, die einen Zulauf mit einer Drosselvorrichtung aufweist. Über die Drosselvorrichtung im Zulauf kann somit die Luftzufuhr zur Luftkammer gesteuert werden.In an advantageous development, the adjustment means consists of a Opening in the cooling tube from the outside enclosing air chamber that an inlet with a throttle device. Via the throttle device in the inlet the air supply to the air chamber can thus be controlled.

Um eine möglichst intensive Kühlung mit dem Kühlstrom zu erreichen, kann der Zulauf der Luftkammer gemäß Anspruch 9 mit dem Luftstromerzeuger verbunden sein.In order to achieve the most intensive possible cooling with the cooling stream, the Inlet of the air chamber according to claim 9 connected to the airflow generator his.

Die in dem Mantel des Kühlrohres eingebrachte Öffnung kann bei den Ausführungsbeispielen als Bohrung oder als radialer Ausschnitt ausgebildet sein. Bei einer besonders vorteilhaften Weiterbildung der Spinnvorrichtung wird die Öffnung durch ein ringförmiges Lochblech im Mantel des Kühlrohres gebildet. Hierbei erstreckt sich das Lochblech über den gesamten Umfang des Kühlrohres. Dadurch wird eine gleichmäßige Einströmung des Kühlluftstromes in das Kühlrohr gewährleistet. Durch die Vielzahl der Löcher wird eine mit wenig Turbulenz behaftete Strömung erzeugt.The opening made in the jacket of the cooling tube can at the Embodiments can be designed as a bore or as a radial cutout. In a particularly advantageous development of the spinning device, the Opening formed by an annular perforated plate in the jacket of the cooling tube. The perforated plate extends over the entire circumference of the cooling tube. This ensures a uniform inflow of cooling air into the Cooling pipe guaranteed. Due to the large number of holes, one with little Turbulent flow creates.

Bei einer besonders bevorzugten Weiterbildung der Erfindung ist das Lochblech kegelförmig mit in Fadenlaufrichtung zunehmendem Querschnitt geformt und in Verlängerung des Kühlrohres auf der Auslaßseite des Kühlrohres angeordnet. Damit wird die Kühlung der Filamente weiter intensiviert, da durch die Expansion des Luftstromes eine bessere Vermischung zwischen dem Kühlluftstrom und dem Luftstrom erfolgt.In a particularly preferred development of the invention, the perforated plate is cone-shaped with increasing cross-section in the thread running direction and in Extension of the cooling tube is arranged on the outlet side of the cooling tube. This further intensifies the cooling of the filaments because of the expansion the air flow a better mixing between the cooling air flow and the Airflow takes place.

Die besonders vorteilhafte Weiterbildung der Erfindung gemäß Anspruch 12 ermöglicht neben einer sehr intensiven Kühlung gleichzeitig ein Vorverstrecken der Filamente. Durch den entgegen der Fadenlaufrichtung gerichteten Kühlluftstrom wird an den Filamenten eine entgegen der Fadenlaufrichtung wirkende Reibkraft erzeugt, die ein Verstrecken der Filamente bewirkt.The particularly advantageous development of the invention according to claim 12 enables not only very intensive cooling but also pre-stretching of filaments. Due to the direction of the thread Cooling air flow on the filaments is opposite to the direction of the thread acting frictional force, which causes the filaments to stretch.

Bei der Ausbildung der Spinnvorrichtung gemäß Anspruch 13 ist die Luftzufuhreinrichtung dabei derart ausgeführt, daß der Kühlluftstrom mittels der Saugeinrichtung erzeugbar ist. Hierzu ist ein zweites Kühlrohr in Verlängerung zum ersten Kühlrohr unmittelbar an der Auslaßkammer der Saugeinrichtung angegeschlossen.In the formation of the spinning device according to claim 13 is the Air supply device executed such that the cooling air flow by means of Suction device can be generated. For this purpose, a second cooling pipe is an extension to the first cooling pipe directly at the outlet chamber of the suction device is closed.

Zur Vergleichmäßigung der Strömung ist das zweite Kühlrohr bevorzugt mit einem trichterförmigen Einlaß und mit einem zylinderförmigen Auslaß mit luftdurchlässiger Wandung ausgeführt.To make the flow more uniform, the second cooling tube is preferably included a funnel-shaped inlet and with a cylindrical outlet air-permeable wall.

Um die Verstreckwirkung bei einer derartigen Luftzufuhreinrichtung zu erhöhen, könnte das Kühlrohr eine Heizeinrichtung aufweisen.In order to increase the stretching effect in such an air supply device, the cooling pipe could have a heating device.

Das erfindungsgemäße Verfahren zeichnet sich besonders dadurch aus, daß textile Fäden oder technische Fäden aus Polyester, Polyamid oder Polypropylen mit dicken Titern und hohen Dehnungswerten hergestellt werden können. Das Verfahren kann hierbei mit unterschiedlichen Behandlungseinrichtungen gekoppelt sein, so daß beispielsweise vollverstreckte Fäden, vororientierte Fäden oder hochorientierte Fäden hergestellt werden können. The inventive method is particularly characterized in that textile Threads or technical threads made of polyester, polyamide or polypropylene with thick titers and high elongation values can be produced. The The process can be carried out with different treatment facilities be coupled so that, for example, fully stretched threads, pre-oriented threads or highly oriented threads can be produced.

Im folgenden werden unter Hinweis auf die beigefügten Zeichnungen einige Ausführungsbeispiele der erfindungsgemäßen Spinnvorrichtung näher beschrieben.The following are some with reference to the accompanying drawings Embodiments of the spinning device according to the invention closer described.

Es stellen dar:

Fig. 1:
ein erstes Ausführungsbeispiel einer erfindungsgemäßen Spinnvorrichtung mit nachgeschalteter Aufspuleinrichtung;
Fig.2:
ein weiteres Ausführungsbeispiel einer erfindungsgemäßen spinnvorrichtung mit Luftzufuhreinrichtung am Kühlrohr;
Fig. 3 :
ein weiteres Ausführungsbeispiel einer Luftzuführeinrichtung;
Fig. 4 und 5:
weitere Ausführungsbeispiele der erfindungsgemäßen Spinnvorrichtung mit Luftzuführeinrichtung.
They represent:
Fig. 1:
a first embodiment of a spinning device according to the invention with a downstream winding device;
Figure 2:
a further embodiment of a spinning device according to the invention with air supply device on the cooling tube;
Fig. 3:
a further embodiment of an air supply device;
4 and 5:
further embodiments of the spinning device according to the invention with air supply device.

In Fig. 1 ist ein erstes Ausführungsbeispiel einer erfindungsgemäßen Spinnvorrichtung zum Spinnen eines synthetischen Fadens gezeigt.In Fig. 1 is a first embodiment of an inventive Spinning device shown for spinning a synthetic thread.

Ein Faden 12 wird aus einem thermoplastischen Material gesponnen. Das thermoplastische Material wird hierzu in einem Extruder oder einer Pumpe aufgeschmolzen. Die Schmelze wird über eine Schmelzeleitung 3 mittels einer Spinnpumpe zu einem beheizten Spinnkopf 1 gefördert. An der Unterseite des Spinnkopfes 1 ist eine Spinndüse 2 angebracht. Aus der Spinndüse 2 tritt die Schmelze in Form von feinen Filamentsträngen 5 aus. Die Filamente 5 durchlaufen als Filamentbündel einen Spinnschacht 6, der durch einen Einlaßzylinder 4 gebildet wird. Der Einlaßzylinder 4 ist hierzu unmittelbar unterhalb des Spinnkopfes 1 angeordnet und umschließt die Filamente 5. Am freien Ende des Einlaßzylinders 4 schließt sich in Fadenlaufrichtung ein Kühlrohr 8 an. Das Kühlrohr 8 weist auf der Einlaufseite der Filamente einen Einlaß 9 auf Der Einlaß 9, der vorzugsweise trichterförmig ausgebildet ist, ist mit dem Einlaßzylinder 4 verbunden. Im engsten Querschnitt des Einlasses 9 weist das Kühlrohr 8 ein zylindrisches Teilstück 32 auf. Am Ende des zylindrischen Teilstücks 32 weist das Kühlrohr 8 einen den Auslaß 33 bildenden Auslaufkegel 10 auf Der Auslaufkegel 10 mündet in eine Auslaufkammer 11. Auf der Unterseite der Auslaufkammer 11 ist eine Luftzufuhreinrichtung 34 angeordnet. Die Luftzufuhreinrichtung 34 besteht aus einem weiteren Kühlrohr 35. Das zweite Kühlrohr 35 ist koaxial zum ersten Kühlrohr 8 auf der Unterseite der Auslaufkammer 11 angebracht. Das zweite Kühlrohr 35 besitzt auf der Einlaufseite einen trichterförmigen Einlaß 36, der mit der Saugkammer 11 verbunden ist. An dem freien Ende des zweiten Kühlrohres 35 ist ein zylinderförmiger Auslaß 37 mit gasdurchlässiger Wandung ausgebildet. Der Auslaß weist stirnseitig eine Auslaßöffnung 13 auf, durch welche die Filamente 5 austreten.A thread 12 is spun from a thermoplastic material. The Thermoplastic material is used in an extruder or a pump melted. The melt is via a melt line 3 by means of a Spinning pump conveyed to a heated spinning head 1. At the bottom of the Spinning head 1, a spinneret 2 is attached. The emerges from the spinneret 2 Melt in the form of fine filament strands 5. The filaments 5 pass through a spinning shaft 6 as a bundle of filaments through a Inlet cylinder 4 is formed. The inlet cylinder 4 is immediate for this arranged below the spinning head 1 and encloses the filaments 5. Am Free end of the inlet cylinder 4 closes a cooling tube in the thread running direction 8 on. The cooling tube 8 has an inlet 9 on the inlet side of the filaments The inlet 9, which is preferably funnel-shaped, is with the Inlet cylinder 4 connected. In the narrowest cross section of the inlet 9, this shows Cooling tube 8 has a cylindrical section 32. At the end of the cylindrical In part 32, the cooling tube 8 has an outlet cone forming the outlet 33 10 on The outlet cone 10 opens into an outlet chamber 11. On the An air supply device 34 is arranged on the underside of the outlet chamber 11. The air supply device 34 consists of a further cooling pipe 35. The second Cooling tube 35 is coaxial with the first cooling tube 8 on the underside of the Outlet chamber 11 attached. The second cooling tube 35 has on the Inlet side a funnel-shaped inlet 36, which with the suction chamber 11th connected is. At the free end of the second cooling tube 35 is a cylindrical outlet 37 formed with a gas-permeable wall. The The outlet has an outlet opening 13 through which the filaments 5 escape.

An einer Seite der Auslaßkammer 11 mündet ein Saugstutzen 14 in die Saugkammer 11. Über den Saugstutzen 14 ist eine am freien Ende des Saugstutzens 14 angeordnete Saugeinrichtung 15 mit der Auslaufkammer 11 verbunden. Die Saugeinrichtung 15 kann beispielsweise eine Unterdruckpumpe oder ein Gebläse aufweisen, welche einen Unterdruck in der Auslaufkammer 11 und somit im ersten Kühlrohr 8 und im zweiten Kühlrohr 35 erzeugt. In der Auslaufkammer 11 ist zwischen dem Auslaß 33 des ersten Kühlrohres 8 und dem Einlaß 36 des zweiten Kühlrohres 35 ein die Filamente 5 umschließender Siebzylinder 30 angeordnet. Der Siebzylinder 30 weist eine luftdurchlässige Wandung auf.On one side of the outlet chamber 11, a suction port 14 opens into the Suction chamber 11. About the suction nozzle 14 is at the free end of the Suction nozzle 14 arranged suction device 15 with the outlet chamber 11 connected. The suction device 15 can for example be a vacuum pump or have a blower which has a negative pressure in the outlet chamber 11 and thus generated in the first cooling tube 8 and in the second cooling tube 35. In the Outlet chamber 11 is between the outlet 33 of the first cooling tube 8 and the Inlet 36 of the second cooling tube 35 enclosing the filaments 5 Screen cylinder 30 arranged. The screen cylinder 30 has an air permeable Wall on.

In der Fadenlaufebene unterhalb der Luftzuführeinrichtung 34 sind eine Präparationseinrichtung 16 und eine Aufspulvorrichtung 20 angeordnet. Die Aufspulvorrichtung 20 besitzt einen Kopffadenführer 19. Der Kopffadenführer 19 zeigt im Beginn des Changierdreiecks an, welches durch die Hin- und Herbewegung eines Changierfadenführers einer Changiereinrichtung 21 entsteht. In the thread running plane below the air supply device 34 there are one Preparation device 16 and a winding device 20 are arranged. The Winding device 20 has a head thread guide 19. The head thread guide 19 shows in the beginning of the traversing triangle, which is characterized by the back and forth Movement of a traversing thread guide of a traversing device 21 arises.

Unterhalb der Changiereinrichtung 21 ist eine Andrückwalze 22 angeordnet. Die Andrückwalze 22 liegt am Umfang einer zu wickelnden Spule 23 an. Die Spule 23 wird auf einer rotierenden Spulspindel 24 erzeugt. Die Spulspindel 24 wird hierzu über den Spindelmotor 25 angetrieben. Der Antrieb der Sulspindel 25 wird hierbei in Abhängigkeit von der Drehzahl der Andrückwalze derart geregelt, daß die Umfangsgeschwindigkeit der Spule und damit die Aufwickelgeschwindigkeit während der Aufwicklung im wesentlichen konstant bleibt.A pressure roller 22 is arranged below the traversing device 21. The Pressure roller 22 lies against the circumference of a coil 23 to be wound. The sink 23 is generated on a rotating winding spindle 24. The winding spindle 24 will driven by the spindle motor 25. The drive of the Sulspindel 25 is regulated here in dependence on the speed of the pressure roller such that the peripheral speed of the bobbin and thus the winding speed remains essentially constant during winding.

Zwischen der Präparationseinrichtung 16 und der Aufspulvorrichtung 20 ist eine Behandlungseinrichtung 17 zur Behandlung des Fadens 12 zwischengeschaltet. Bei dem in Fig. 1 gezeigten Ausführungsbeispiel wird die Behandlungseirichtung 17 durch eine Verwirbelungsdüse 18 gebildet.There is a between the preparation device 16 and the winding device 20 Treatment device 17 for treating the thread 12 interposed. In the embodiment shown in Fig. 1, the treatment device 17 formed by a swirl nozzle 18.

In Abhängigkeit von dem Herstellungsprozeß können in der Behandlungseinrichtung eine oder mehrere unbeheizte oder beheizte Galetten angeordnet sein, so daß der Faden vor der Aufwicklung verstreckt wird. Ebenso besteht die Möglichkeit, zusätzliche Heizeinrichtungen zur Verstreckung oder zur Relaxation innerhalb der Behandlungseinrichtung 17 anzuordnen.Depending on the manufacturing process, Treatment facility one or more unheated or heated godets be arranged so that the thread is stretched before winding. As well there is the possibility of additional heating devices for stretching or To arrange relaxation within the treatment device 17.

Bei der in Fig. 1 gezeigten Spinnvorrichtung wird eine Polymerschmelze zum Spinnkopf 1 gefördert und über die Spinndüse 2 in eine Vielzahl von Filamenten 5 extrudiert. Das Filamentbündel wird von der Aufspulvorrichtung 20 abgezogen. Hierbei durchläuft das Filamentbündel mit zunehmender Geschwindigkeit den Spinnschacht 6 innerhalb des Einlaßzylinders 4. Anschließend tritt das Filamentbündel über den trichterförmigen Einlaß 9 in das Kühlrohr 8 ein. In dem Kühlrohr 8 wird über die Saugeinrichtung 15 ein Unterdruck erzeugt. Dadurch wird die außen am Einlaßzylinder 4 anstehende Umgebungsluft in den Spinnschacht 6 hineingesogen. Die in den Spinnschacht 6 eindringende Luftmenge ist hierbei proportional der Gasdurchlässigkeit der Wandung des Einlaßzylinders 4. Die einströmende Luft führt zu einer Vorkühlung der Filamente, so daß sich die Randschichten der Filamente verfestigen. Im Kern bleiben die Filamente jedoch schmelzeflüssig. Die Luftmenge wird sodann über den Einlaß 9 zusammen mit dem Filamentbündel in das Kühlrohr 8 eingesogen. Die Luftströmung wird aufgrund des am Ende des Einlasses 9 ausgebildeten engsten Querschnittes und unter Wirkung der Saugeinrichtung 15 derart beschleunigt, daß im Kühlrohr keine der Filamentbewegung entgegenwirkende Luftströmung mehr vorhanden ist. Der engste Querschnitt ist im gesamten Bereich des zylinderförmigen Teilstücks 32 ausgebildet. Damit ist die Beschleunigungsstrecke innerhalb des Kühlrohres 8 durch die Länge des zylindrischen Teilstücks 32 bestimmt. Das zylindrische Teilstück kann hierbei eine Länge von wenigen Millimetern bis zu 500 Millimetern oder darüber aufweisen. Durch die Luftströmung in Fadenlaufrichtung wird die Belastung an den Filamenten verringert. Der Erstarrungspunkt verlagert sich von der Spinndüse weg. Damit kann der Zusammenhang zwischen der Spinngeschwindigkeit und der Verstreckung bei der Herstellung des Fadens derart beeinflußt werden, daß trotz hoher Spinngeschwindigkeiten hohe Dehnungwerte erreicht werden. Innerhalb des Kühlrohres 8 kommt es zu einer Abkühlung der Filamente 5.In the spinning device shown in Fig. 1, a polymer melt is used for Spinning head 1 conveyed and through the spinneret 2 into a variety of filaments 5 extruded. The bundle of filaments is drawn off the winding device 20. Here, the filament bundle passes through the with increasing speed Spinning shaft 6 within the inlet cylinder 4. Then that occurs Filament bundles into the cooling tube 8 via the funnel-shaped inlet 9. By doing Cooling tube 8, a negative pressure is generated via the suction device 15. Thereby the ambient air present at the inlet cylinder 4 into the Spinning shaft 6 sucked in. The penetrating into the spinning shaft 6 The amount of air is proportional to the gas permeability of the wall of the Inlet cylinder 4. The inflowing air leads to a pre-cooling of the Filaments so that the outer layers of the filaments solidify. At its core however, the filaments remain molten. The amount of air is then over sucked the inlet 9 together with the filament bundle into the cooling tube 8. The air flow is formed due to that at the end of the inlet 9 narrowest cross section and under the action of the suction device 15 such accelerates that no counteracting the filament movement in the cooling tube Air flow is more there. The narrowest cross section is in the whole Area of the cylindrical portion 32 is formed. So that's it Acceleration distance within the cooling tube 8 by the length of the cylindrical portion 32 determined. The cylindrical section can a length of a few millimeters up to 500 millimeters or more exhibit. The air flow in the direction of the thread increases the load the filaments decreased. The solidification point shifts from the spinneret path. This allows the relationship between the spinning speed and the Drawing in the manufacture of the thread can be influenced in such a way that despite high spinning speeds high elongation values can be achieved. Within of the cooling tube 8, the filaments 5 are cooled.

Zur weiteren Abkühlung wird mittels der Luftzuführeinrichtung 34 ein zusätzlicher Kühlluftstrom erzeugt. Hierzu durchlaufen die Filamente ein zweites Kühlrohr 35, das unterhalb des ersten Kühlrohres 8 angeordnet ist. Der Auslaufkegel 10 des ersten Kühlrohres und der trichterförmige Einlaß 36 des zweiten Kühlrohres 35 münden beide in der Auslaufkammer 11. Der Luftstrom aus dem Kühlrohr 8 und der Kühlluftstrom aus dem Kühlrohr 35 werden aufgrund der Wirkung der Saugeinrichtung 15 in die Auslaufkammer 11 eingesogen und treten über den Siebzylinder 30 durch den Saugstutzen 14 aus der Auslaufkammer 11 aus. Sodann wird der gesamte Luftstrom durch die Saugeinrichtung 15 abgeführt.For further cooling, an air supply device 34 is used additional cooling air flow generated. For this purpose, the filaments pass through a second one Cooling tube 35, which is arranged below the first cooling tube 8. The Outlet cone 10 of the first cooling tube and the funnel-shaped inlet 36 of the second cooling tube 35 both open into the outlet chamber 11. The air flow from the cooling pipe 8 and the cooling air flow from the cooling pipe 35 are due the effect of the suction device 15 sucked into the outlet chamber 11 and pass through the screen cylinder 30 through the suction port 14 from the Outlet chamber 11 from. Then the entire air flow through the Suction device 15 removed.

Die Filamente 5 treten auf der Auslaßseite des Kühlrohres 35 durch die Ausslaßöffnung 13 aus und laufen in die Präparationseinrichtung 16 ein. Durch die Präparationseinrichtung 16 werden die Filamente zu einem Faden 12 zusammengeführt. Zur Erhöhung des Fadenschlusses wird der Faden 12 vor der Aufwicklung durch eine Verwirbelungsdüse 18 verwirbelt. In der Aufspulvorrichtung wird der Faden 12 zu der Spule 23 aufgewickelt.The filaments 5 pass through on the outlet side of the cooling tube 35 Outlet opening 13 and run into the preparation device 16. By the preparation device 16, the filaments become a thread 12 merged. To increase the thread closure, the thread 12 is in front of the Winding swirled through a swirl nozzle 18. In the Winding device, the thread 12 is wound into the bobbin 23.

Bei der in Fig. 1 gezeigten Anordnung kann beispielsweise ein Polyesterfaden erzeugt werden, der mit einer Aufwickelgeschwindigkeit von > 7.000 m/min aufgewickelt wird. Die in Fig. 1 gezeigte Spinnvorrichtung zeichnet sich dadurch aus, daß die in den Einlaßzylinder eintretende Luftmenge auf die verzögerte Wärmebehandlung der Filamente abgestimmt wird. Dabei kann vorteilhaft die Vorkühlung sowie die verzögerte Erstarrung der Filamente beeinfluß werden. Die Endkühlung der Filamente erfolgt in einer zweiten Zone, die durch das zweite Kühlrohr 35 gebildet wird. Zur Intensivierung der Kühlung könnte die Luftzufuhreinrichtung 34 durch einen Luftstromerzeuger ergänzt werden, der auf der Auslaßseite des zweiten Kühlrohres 35 angeschlossen sein könnte.In the arrangement shown in Fig. 1, for example, a polyester thread generated with a winding speed of> 7,000 m / min is wound up. The spinning device shown in Fig. 1 is characterized by this that the amount of air entering the intake cylinder is delayed to the Heat treatment of the filaments is matched. It can be advantageous Pre-cooling and the delayed solidification of the filaments can be influenced. The Final cooling of the filaments takes place in a second zone through the second Cooling tube 35 is formed. To intensify cooling, the Air supply device 34 are supplemented by an air flow generator, which is based on the outlet side of the second cooling tube 35 could be connected.

In Fig. 2 ist ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Spinnvorrichtung gezeigt, bei welcher eine Luftzuführeinrichtung 34 mit einem Luftstromerzeuger 38 vorgesehen ist.2 shows a further exemplary embodiment of an inventive device Spinning device shown, in which an air supply device 34 with a Air flow generator 38 is provided.

Die in Fig. 2 dargestellte Spinnvorrichtung unterscheidet sich von dem Ausführungsbeispiel aus Fig. 1 in der Ausbildung der Luftzuführeinrichtung 34. Daher wird zur Beschreibung der übrigen Bauteile, die identische Bezugszeichen erhalten haben, auf die Beschreibung zu dem Ausführungsbeispiel gemäß Fig. 1 Bezug genommen.The spinning device shown in Fig. 2 differs from that 1 in the configuration of the air supply device 34. Therefore, for the description of the other components, the identical reference numerals received on the description of the embodiment of FIG. 1st Referred.

Bei dem in Fig. 2 gezeigten Ausführungsbeispiel der erfindungsgemäßen Spinnvorrichtung ist die Luftzuführeinrichtung 34 im Bereich des zylindrischen Teilstücks 32 des Kühlrohres 8 ausgebildet. Hierzu weist das Kühlrohr 8 im Mantel des zylindrischen Teilstücks 32 eine Öffnung 39 auf. Die Öffnung 39 wird durch ein ringförmiges Lochblech 40 gebildet, das in dem Mantel des zylindrischen Teilstücks 32 eingefügt ist. Die Öffnung 39 im Mantel des zylindrischen Teilstückes 32 wird durch eine außen am Mantel des Teilstückes 32 anliegende Luftkammer 42 eingeschlossen. Die Luftkammer 42 weist einen Zulauf 41 auf Der Zulauf 41 ist an einem Luftstromerzeuger 38 angeschlossen. In dem Zulauf 41 ist zwischen dem Luftstromerzeuger 38 und der Luftkammer 42 eine verstellbare Drossel 44 angeordnet, durch welche der freie Strömungsquerschnitt des Zulaufes 41 steuerbar ist.In the embodiment of the invention shown in Fig. 2 Spinning device is the air supply device 34 in the region of the cylindrical Section 32 of the cooling tube 8 is formed. For this purpose, the cooling pipe 8 in Jacket of the cylindrical section 32 has an opening 39. The opening 39 is formed by an annular perforated plate 40, which is in the jacket of the cylindrical portion 32 is inserted. The opening 39 in the jacket of the cylindrical portion 32 is by an outside of the shell of the portion 32nd enclosed air chamber 42 included. The air chamber 42 has one Inlet 41 on The inlet 41 is connected to an air flow generator 38. In the inlet 41 is between the air flow generator 38 and the air chamber 42 an adjustable throttle 44 is arranged, through which the free Flow cross section of the inlet 41 is controllable.

Bei dem in Fig. 2 gezeigten Ausführungsbeispiel der erfindungsgemäßen Spinnvorrichtung wir der zusätzliche Kühlluftstrom durch das Zusammenwirken der Saugeinrichtung 15 und des Luftstromerzeugers 38 der Luftzuführeinrichtung 34 gebildet. Der Kühlluftstrom tritt hierbei durch die Öffnung 39 in die Beschleunigungsstrecke des Kühlrohres 8 ein. Zur Vermeidung von Turbulenzen innerhalb des Kühlrohres 8 tritt der Kühlluftstrom über eine Vielzahl von Lochungen des Lochbleches 40 in die Öffnung 39 ein. Der Kühlluftstrom und der Luftstrom vermengen sich und strömen in Fadenlaufrichtung bis zum Auslaß 33 des Kühlrohres 8. Hier treten der Kühlluftstrom und der Luftstrom in die Auslaufkammer 11 ein und werden über den Saugstutzen 14 durch die Saugeinrichtung 15 abgeführt. Das Filamentbündel wird innerhalb des Kühlrohres 8 abgekühlt. Auf der Unterseite der Auslaufkammer 11 verläßt das Filamentbündel 5 die Kühlstrecke durch eine Auslaßöffnung 13. Anschließend wird das Filamentbündel in der Präparationseinrichtung 16 zu dem Faden zusammengeführt.In the embodiment of the invention shown in Fig. 2 Spinning device we the additional cooling air flow through the interaction the suction device 15 and the air flow generator 38 of the air supply device 34 formed. The cooling air flow enters through the opening 39 in the Acceleration distance of the cooling tube 8. To avoid turbulence within the cooling tube 8, the cooling air flow occurs over a variety of Perforations in perforated plate 40 into opening 39. The cooling air flow and the Air flow mixes and flows in the thread running direction up to outlet 33 of the cooling tube 8. Here the cooling air flow and the air flow enter Outlet chamber 11 and are through the suction nozzle 14 through the Suction device 15 removed. The filament bundle is inside the cooling tube 8 cooled. That leaves on the underside of the outlet chamber 11 Filament bundle 5, the cooling section through an outlet opening 13. Then the filament bundle becomes the thread in the preparation device 16 merged.

Die in Fig. 2 gezeigte Ausführung der erfindungsgemäßen Spinnvorrichtung zeichnet sich dadurch aus, daß trotz der verzögerten Abkühlung und damit der Verlagerung des Erstarrungspunktes innerhalb des Kühlrohres eine intensive Kühlung innerhalb des Kühlrohres stattfinden kann.The embodiment of the spinning device according to the invention shown in FIG. 2 is characterized in that despite the delayed cooling and thus the Relocation of the solidification point within the cooling tube an intensive Cooling can take place within the cooling tube.

Der am Einlaß 9 des Kühlrohres 8 eintretende Luftstrom und die Position der Luftzuführeinrichtung 34 an dem Kühlrohr sind hierbei derart abgestimmt, daß der Kühlluftstrom kurz vor oder kurz nach dem Erstarrungspunkt der Filamente in das Kühlrohr 8 eintritt. Damit wird eine hihe Gleichmäßigkeit bei der Ausbildung der Filamente bzw. des Fadens erreicht.The air flow entering the inlet 9 of the cooling tube 8 and the position of the Air supply device 34 on the cooling tube are matched in such a way that the cooling air flow just before or just after the solidification point of the filaments in the cooling tube 8 enters. This ensures a high level of uniformity in training the filament or thread is reached.

Die Luftzuführeinrichtung 34 kann hierbei auch durch eine am Umfang örtlich begrenzte Öffnung gebildet werden. Ebenso besteht die Möglichkeit, die Luftzuführeinrichtung 34 ohne Luftstromerzeuger 38 auszuführen, so daß direkt die Umgebungsluft über den Zulauf 41 in die Luftkammer 42 aufgrund der Wirkung der Saugeinrichtung 15 eintreten kann.The air supply device 34 can also be local by a circumference limited opening can be formed. There is also the possibility of Air supply device 34 to run without air flow generator 38, so that directly the ambient air via the inlet 41 into the air chamber 42 due to the Effect of the suction device 15 can occur.

In Fig. 3 ist eine Modifikation der Luftzuführeinrichtung 34 gezeigt, wie sie beispielsweise in der Spinnvorrichtung aus Fig. 2 eingesetzt sein könnte. Hierbei wird die Öffnung 39 in dem zylindrischen Teisltück 32 des Kühlrohres 8 durch eine axial verschiebbare Gehäusemuffe 43 abgedeckt. Der Teil der Öffnung 39, der nicht von der Gehäusemuffe 43 abgedeckt ist, steht mit der Umgebungsluft in Verbindung. Aufgrund der Unterdruckatmosphäre in dem Kühlrohr 8 wird sich somit ein zusätzlicher Kühlluftstrom ausbilden, der über den freien Strömungsquerschnitt der Öffnung 39 in das Innere des Kühlrohres 8 einströmt. In Fadenlaufrichtung vor der Luftzuführeinrichtung 34 werden die Filamente 5 mit dem auf der Einlaßseite des Kühlrohres 8 eingesogenen Luftstroms beaufschlagt, der die Abkühlung der Filamente verzögert. Erst nachdem die Filamente 5 die Luftzuführeinrichtung 34 passiert haben, wird über den zusätzlich einströmenden Kühlluftstrom die Kühlung der Filamente intensiviert, so daß bei Austritt aus dem Kühlrohr 8 die Filamente abgekühlt sind. Durch Verstellung der Gehäusemuffe 43 kann hierbei in Abhängigkeit vom Fadentiter bzw. vom Polymertyp die Luftmenge zur Ausbildung des Kühlluftstroms reguliert werden.3 shows a modification of the air supply device 34 as it is for example, could be used in the spinning device of FIG. 2. in this connection the opening 39 in the cylindrical part 32 of the cooling tube 8 through an axially displaceable housing sleeve 43 covered. The part of the opening 39, that is not covered by the housing sleeve 43 is in with the ambient air Connection. Due to the negative pressure atmosphere in the cooling pipe 8 will thus form an additional cooling air flow that over the free Flow cross-section of the opening 39 flows into the interior of the cooling tube 8. In the thread running direction in front of the air supply device 34, the filaments 5 with the air flow drawn in on the inlet side of the cooling tube 8 applied, which delays the cooling of the filaments. Only after that Filaments 5 have passed the air supply device 34, in addition to the inflowing cooling air flow intensifies the cooling of the filaments, so that at Exit from the cooling tube 8, the filaments are cooled. By adjusting the Housing sleeve 43 can depend on the thread titer or Polymer type the amount of air to form the cooling air flow can be regulated.

In Fig. 4 ist ein weiteres Ausführungsbeispiel einer Luftzurühreinrichtnug 34 gezeigt. Die Spinnvorrichtung ist mit dem Ausführungsbeispiel gemäß Fig. 2 identisch. Insoweit wird auf die Beschreibung zu der Fig. 2 Bezug genommen. 4 is another embodiment of an air agitator 34 shown. The spinning device is with the exemplary embodiment according to FIG. 2 identical. In this respect, reference is made to the description of FIG. 2.

Die Luftzuführeinrichtung 34 ist bei dem Ausführungsbeispiel der Spinnvorrichtung gemäß Fig. 4 auf der Auslaßseite des Kühlrohres 8 ausgebildet. Hierzu ist der Auslaufkegel 10 mit einer gasdurchlässigen Wand ausgebildet. Die Öffnung 39 im Mantel des Kühlrohres 8 erstreckt sich somit vom Ende des zylindrischen Teilstücks 32 bis zum Auslaß 33. Die gasdurchlässige Wand des Auslaufkegels 10 ist innerhalb einer das Kühlrohr 8 einschließenden Luftkammer 42 angeordnet. Die Luftkammer 42 besitzt einen Zulauf 41, der am Ende mit der Umgebungsluft verbunden ist. Durch eine verstellbare Drossel 44 wird der freie Strömungsquerschnitt vom Zulauf 41 gesteuert.The air supply device 34 is in the embodiment of FIG 4 is formed on the outlet side of the cooling tube 8. For this purpose, the outlet cone 10 is formed with a gas-permeable wall. The Opening 39 in the jacket of the cooling tube 8 thus extends from the end of the cylindrical portion 32 to the outlet 33. The gas permeable wall of the The outlet cone 10 is within an air chamber enclosing the cooling tube 8 42 arranged. The air chamber 42 has an inlet 41, which at the end with the Ambient air is connected. With an adjustable throttle 44 the free Flow cross section controlled by the inlet 41.

Bei der in Fig. 4 dargestellten Spinnvorrichtung wird der zusätzliche Kühlluftstrom durch die Saugeinrichtung 15 erzeugt. Hierbei tritt die Umgebungsluft durch den Zulauf 41 in die Luftkammer 42 ein. Von der Luftkammer 42 gelangt die Umgebungslust aufgrund der Unterdruckatmosphäre innerhalb des Kühlrohres durch die luftdurchlässige Wandung des Auslaufkegels 10. Aufgrund des in Fadenlaufrichtung sich erweiternden Querschnitts erfolgt eine intensive Durchmischung zwischen dem die Filamente begleitenden Luftstrom und dem seitlich eintretenden Kühlluftstrom. Es kommt zu einer intensiven Kühlung der Filamente. Der Kühlluftstrom und der Luftstrom werden über die Auslaßkammer 11 und dem Saugstutzen 14 von der Saugeinrichtung 15 abgeführt.In the spinning device shown in Fig. 4, the additional Cooling air flow generated by the suction device 15. Here occurs the Ambient air through the inlet 41 into the air chamber 42. Of the Air chamber 42 gets the lust for the environment due to the negative pressure atmosphere inside the cooling tube through the air-permeable wall of the outlet cone 10. Due to the widening cross-section in the thread running direction there is a intensive mixing between the air flow accompanying the filaments and the cooling air flow entering from the side. There is an intense Cooling the filaments. The cooling air flow and the air flow are over the Outlet chamber 11 and the suction nozzle 14 from the suction device 15 dissipated.

In Fig. 5 ist ein weiteres Ausführungsbeispiel eines Kühlsystems einer Spinnvorrichtung gezeigt. Hierbei ist die Luftzuführeinrichtung unterhalb des Einlasses 9 im Bereich des zylindrischen Teilstückes 32 vom Kühlrohr 8 angeordnet. Insoweit ist die in Fig. 5 gezeigte Ausführung identisch zu der in Fig. 2 gezeigten Ausführung. Somit wird Bezug genommen auf die Beschreibung zu Fig. 2.5 shows a further exemplary embodiment of a cooling system Spinning device shown. Here, the air supply device is below the Inlets 9 in the area of the cylindrical section 32 from the cooling pipe 8 arranged. In this respect, the embodiment shown in FIG. 5 is identical to that in FIG. 2 shown execution. Thus, reference is made to the description Fig. 2.

Die Luftzuführeinrichtung 34 aus Fig. 5 weist eine Öffnung 39 im Mantel des Kühlrohres 8 auf, die in Form einer Bohrung ausgefüht ist. Des weiteren besteht die Luftzufuhreinrichtung aus einem Injektor 45 und einer Druckluftquelle 47. Die Druckluftquelle 47 ist mit einer Düsenbohrung 46 des Injektors 45 verbunden. Der Injektor 45 und die Druckluftquelle 47 wirken als Luftstromerzeuger und leiten einen Kühlluftstrom durch die Öffnung 39 in das Innere des Kühlrohres 8. Die Düsenbohrung 46 des Injektors 45 ist derart ausgebildet, daß zwischen der Mittelachse des Kühlrohres und der Düsenbohrung ein Winkel in Fadenlaufrichtung von < 90 ° gebildet ist. Damit wird der Kühlluftstrom in Fadenlaufrichtung gerichtet in das Innere des Kühlrohres 8 eingeleitet.The air supply device 34 from FIG. 5 has an opening 39 in the jacket of the Cooling tube 8, which is executed in the form of a bore. Furthermore there is the air supply device from an injector 45 and a compressed air source 47. The compressed air source 47 is connected to a nozzle bore 46 of the injector 45. The injector 45 and the compressed air source 47 act as an air flow generator and conduct a cooling air flow through the opening 39 into the interior of the cooling tube 8. The nozzle bore 46 of the injector 45 is designed such that between the Center axis of the cooling tube and the nozzle bore an angle in Thread running direction of <90 ° is formed. So that the cooling air flow in Thread running direction introduced into the interior of the cooling tube 8.

Neben der Kühlwirkung hat sich die Ausführung der Luftzufuhreinrichtung gemäß Fig. 5 insbesondere zum Einfädeln der Filamente bei Prozeßbeginn bewährt. Durch den Injektor wird der Kühlluftstrom mit hoher Beschleunigung in das Innere des Kühlrohres eingeleitet, der sich aufgrund der Saugwirkung der Saugeinrichtung 15 im wesentlichen im mittleren Bereich des Rohrquerschnittes fortpflanzt. Diese Strömung reißt die Filamente mit und führt das Filamentbündel sicher durch das Kühlrohr 8. Um den Effekt noch zu erhöhen, könnte auf der gegenüberliegenden Seite am Mantel eine zweite oder weitere Luftzuführeinrichtungen mit Injektor angeordnet sein.In addition to the cooling effect, the design of the air supply device 5 in particular for threading the filaments at the start of the process proven. Through the injector, the cooling air flow is accelerated with high acceleration initiated the interior of the cooling tube, which is due to the suction of Suction device 15 essentially in the central region of the pipe cross section propagates. This flow entrains the filaments and guides the bundle of filaments safely through the cooling tube 8. To increase the effect, could on the opposite side of the coat a second or more Air supply devices can be arranged with an injector.

Die in den Fig. 2 bis 4 gezeigten Luftzuführeinrichtungen weisen jeweils ringförmige Öffnungen auf, die sich über den gesamten Umfang des Kühlrohres erstrecken. Es ist jedoch auch möglich, die Öffnung nur partiell auf einem bestimmten Umfangsabschnitt des Kühlrohres zu begrenzen. Es können auch mehrere Öffnungen nebeneinander und/oder hintereinander am Mantel des Kühlrohres ausgebildet sein. Durch die Gestaltung der Öffnungen bzw. durch Einfügen von porenförmigen Wänden, wie beispielsweise dem Lochblech, kann die Strömung des Kühlluftstroms im wesentlichen ohne größere Turbulenzen zu verursachen in das Innere des Kühlrohres einströmen. Mit der in Fig. 4 gezeigten Ausführungsform der Luftzuführeinrichtung wird eine besonders turbulenzarme Strömung zur Kühlung der Filamente erzeugt, was die Spinnsicherheit bzw. die Laufruhe des Fadens erhöht. The air supply devices shown in FIGS. 2 to 4 each have annular openings that extend over the entire circumference of the cooling tube extend. However, it is also possible to only partially open the opening limit certain peripheral portion of the cooling tube. It can too several openings side by side and / or one behind the other on the jacket of the Be designed cooling tube. By designing the openings or by Inserting pore-shaped walls, such as the perforated plate, can the flow of the cooling air flow substantially without major turbulence cause to flow into the interior of the cooling tube. With the one shown in Fig. 4 Embodiment of the air supply device is a particularly low turbulence Flow for cooling the filaments creates what the spinning security or Smooth running of the thread increased.

Die Erfindung ist nicht auf eine bestimmte Formgebung des Kühlrohres beschränkt. Die in den Ausführungen dargestellten zylindrischen Formen sind beispielhaft und können ohne Schwierigkeit durch eine ovale Ausbildung oder bei Verwendung von Rechteckdüsen sogar durch eine eckige Ausbildung des Kühlrohres ersetzt werden.The invention is not based on a specific shape of the cooling tube limited. The cylindrical shapes shown in the explanations are exemplary and can easily with an oval training or at Use of rectangular nozzles even through an angular formation of the Cooling tube to be replaced.

Ebenso kann es von Vorteil sein - insbesondere bei der Herstellung von hochorientierten Fäden -, das zylindrische Teilstück des Kühlrohres sehr kurz auszuführen. Im Extremfall besteht das Kühlrohr nur aus einem Einlaufkegel, so daß die Luftzufuhreinrichtung gemäß dem Ausführungsbeispiel nach Fig.2 im Bereich des Auslaufkegels 10 angebracht wäre. It can also be an advantage - especially in the production of highly oriented threads -, the cylindrical section of the cooling tube very short perform. In extreme cases, the cooling pipe consists of only one inlet cone, see above that the air supply device according to the embodiment of Figure 2 in Area of the outlet cone 10 would be attached.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Spinnkopfspinning head
22
Spinndüsespinneret
33
Schmelzeleitungmelt line
44
Einlaßzylinderintake cylinder
55
Filamentefilaments
66
Spinnschachtspinning shaft
77
Wandungwall
88th
Kühlrohrcooling pipe
99
Einlaufkegelinlet cone
1010
Auslaufkegeldischarge cone
1111
Auslaufkammeroutlet chamber
1212
Fadenthread
1313
Auslaßöffnungoutlet
1414
Saugstutzensuction
1515
Luftstromerzeuger,SaugeinrichtungAir flow generator, suction device
1616
Präparationseinrichtungpreparation device
1717
Behandlungseinrichtungtreatment facility
1818
Verwirbelungsdüseswirl jet
1919
KopffadenführerYarn guide
2020
Aufspulvorrichtungspooling
2121
ChangiereinrichtungTraversing device
2222
Andrückwalzepressure roller
2323
SpuleKitchen sink
2424
Spulspindelwinding spindle
2525
Spindelantriebspindle drive
2626
Lochungperforation
2727
Strömungsprofilflow profile
2929
Lochungperforation
3030
Siebzylinder screen cylinder
3131
Heizeinrichtungheater
3232
Teilstücksection
3333
Auslaßoutlet
3434
LuftzufuhreinrichtungAir supply means
3535
Kühlrohrcooling pipe
3636
EinlaßInlet
3737
Auslaßoutlet
3838
LuftstromerzeugerAir flow generator
3939
Öffnungopening
4040
Lochblechperforated sheet
4141
ZulaufIntake
4242
Luftkammerair chamber
4343
Gehäusemuffehousing sleeve
4444
Drosselthrottle
4545
Injektorinjector
4646
Düsenbohrungnozzle bore
4747
DruckluftquelleCompressed air source

Claims (18)

  1. Apparatus for spinning a synthetic yarn (12), which is formed by combining a filament bundle consisting of a multiplicity of individual filaments (5) and which is wound to a package (23) by a takeup device (20) downstream of the spinning apparatus, the apparatus comprising a spinneret (2); a cooling tube (8) extending at a distance from spinneret (2) downstream thereof, the cooling tube comprising a funnel-shaped inlet (9) with a narrowest cross section in cooling tube (8), a cylindrical portion (32) connected to the inlet (9), and an outlet (33); a gas-permeable inlet cylinder (4) arranged between spinneret (2) and inlet (9) of cooling tube (8); a suction device (15) that connects to the outlet (33) of cooling tube (8) such that it generates an air stream in cooling tube (8) in direction of the advancing yarn; and an air supply device (34) for generating an additional cooling air stream in axial direction of the cooling tube (8) for cooling filaments (5), wherein the air supply device (34) is formed in direction of the advancing yam downstream of the inlet (9) in the region of the cooling tube (8) or downstream of the outlet (33) of the cooling tube (8).
  2. Spinning apparatus o according to f claim 1, characterized in that the air supply device (34) connects to the cooling tube (8) such that the cooling air stream and the air stream flow jointly in direction of the advancing yarn.
  3. Spinning apparatus according to claim 2, characterized in that the air supply device (34) is formed by at least one opening (39) in the envelope of cooling tube (8) between the inlet (9) and the outlet (33) of the cooling tube, wherein the cooling stream entering the cooling tube (8) through the opening is generated from the ambient air by means of the suction device (15).
  4. Spinning apparatus according to claim 2, characterized in that the air supply device (34) is formed by at least one opening (39) in the envelope of cooling tube (8) between the inlet (9) and the outlet (33) of cooling tube (8) and by an air stream generator (38) connecting to the opening (39), wherein the cooling stream entering the cooling tube (8) through the opening (39) is generated by means of the air stream generator (38).
  5. Spinning apparatus according to claim 4, characterized in that the air stream generator is an injector (45) with at least one nozzle bore (46) and a source of compressed air (47) connected to the injector (45), that the nozzle bore (46) of the injector (45) terminates directly in the opening (39), wherein between the center axis of the cooling tube (8) and the nozzle (46) an angle smaller than 90°, preferably 15° to 30° is formed in direction of the advancing yarn.
  6. Spinning apparatus according to claim 3 or 4, characterized in that the air supply device (34) comprises an adjustment means (43) for varying the free flow cross section of the opening (39).
  7. Spinning apparatus according to claim 6, characterized in that the adjustment means is a sleeve (43) arranged on the cooling tube (8), which is slidable for partially closing the opening (39).
  8. Spinning apparatus according to claim 6, characterized in that the adjustment means consists of an air chamber (42) having a supply line (41) and externally enclosing the opening (39) in cooling tube (8), and a throttling device (44), which controls in supply line (41) the air supply to air chamber (42).
  9. Spinning apparatus according to claim 8, characterized in that the supply line (41) of air chamber (42) connects with its free end to the air stream generator (38).
  10. Spinning apparatus according to one of claims 3-9, characterized in that the opening (39) is formed in the envelope of cooling tube (8) by an annular, perforated sheet element (40), which extends over the entire circumference of the cooling tube.
  11. Spinning apparatus according to claim 10, characterized in that the perforated sheet element (40) is conically shaped with its cross section increasing in direction of the advancing yarn and arranged in the extension of the cylindrical tube portion (32) at the outlet side of cooling tube (8).
  12. Spinning apparatus according to claim 1, characterized in that the air supply device (34) is arranged on the outlet side of cooling tube (8) such that the cooling air stream flows oppositely to the direction of the advancing yarn.
  13. Apparatus according to claim 12, characterized in that the air supply device (34) is a second cooling tube (35) through which the filament bundle advances, and that the second cooling tube (35) connects in the axial extension of the first cooling tube (8) to the outlet (33) of the first cooling (8) such that the cooling air stream in the second cooling tube (35) is generated by the suction device (15).
  14. Spinning apparatus according to claim 13, characterized in that the second cooling tube (35) comprises a funnel-shaped inlet (36) and a cylindrical outlet (37) with an air-permeable wall.
  15. Spinning apparatus according to claim 13 or 14, characterized in that the outlet (33) of the first cooling tube (8) and the inlet (36) of the second cooling tube (35) are interconnected by an outlet chamber (11), with the suction device being connected to the outlet chamber.
  16. Method of spinning a synthetic yarn (12), which is formed by combining a filament bundle consisting of a multiplicity of individual filaments (5), and which is wound to a package (23) by a takeup device (20) downstream of the spinning apparatus, wherein the filaments (5) are extruded from a polymer melt by means of a spinneret (2); wherein the filaments (5) are cooled by means of air in a precooling zone and a cooling zone; wherein the cooling zone comprises a funnel-shaped inlet (9) and a cooling tube with a vacuum which is generated by a suction device (15) being arranged in direction of the advancing yarn below and an outlet (33), so that in the cooling tube (8) an air stream is generated in direction of the advancing yarn for assisting the advance of the filaments (5), wherein the cooling and the spinning speed are adapted to each other such that the filaments (5) firm up only within the cooling tube (8), and wherein the filaments (5) are combined to the yarn (12) at the end of the cooling zone, wherein the filaments (5) are cooled for firming up before being combined to the yarn (12) by an additional axial cooling air stream generated in the cooling zone below the inlet (9) or below the outlet (33).
  17. Method according to claim 16, characterized in that the cooling air stream flows within the cooling zone in the same direction as the air stream.
  18. Method according to claim 16, characterized in that the cooling air stream flows within the cooling zone oppositely to the direction of the advancing yarn.
EP99938309A 1998-07-23 1999-07-21 Spinning device and method for spinning a synthetic thread Expired - Lifetime EP1102878B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19833188 1998-07-23
DE19833188 1998-07-23
PCT/EP1999/005203 WO2000005439A1 (en) 1998-07-23 1999-07-21 Spinning device and method for spinning a synthetic thread

Publications (2)

Publication Number Publication Date
EP1102878A1 EP1102878A1 (en) 2001-05-30
EP1102878B1 true EP1102878B1 (en) 2004-09-22

Family

ID=7875072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99938309A Expired - Lifetime EP1102878B1 (en) 1998-07-23 1999-07-21 Spinning device and method for spinning a synthetic thread

Country Status (8)

Country Link
US (1) US6716014B2 (en)
EP (1) EP1102878B1 (en)
JP (1) JP4357119B2 (en)
KR (1) KR100574180B1 (en)
CN (1) CN1117186C (en)
DE (1) DE59910596D1 (en)
TW (1) TW530101B (en)
WO (1) WO2000005439A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6444151B1 (en) * 1999-04-15 2002-09-03 E. I. Du Pont De Nemours And Company Apparatus and process for spinning polymeric filaments
EP1079008A1 (en) * 1999-08-26 2001-02-28 B a r m a g AG Process and apparatus for the spinning of a multifilament yarn
EP1228268B1 (en) * 1999-09-07 2004-02-18 Barmag Ag Method for fusion spinning
KR100673337B1 (en) 2000-04-18 2007-01-23 바마크 악티엔게젤샤프트 Spinning device
GB0011351D0 (en) * 2000-05-12 2000-06-28 British American Tobacco Co Tobacco reconstitution
KR20030058353A (en) * 2001-12-31 2003-07-07 백석기 Method of and apparatus for controlling quenching air in spinning machine for thermoplastic synthetic microfiber
CZ20056A3 (en) * 2002-07-05 2005-05-18 Diolen Industrial Fibers B.V. Process of spinning multifilament thread, fibrous yarn, polyester fibrous yarn and cord comprising the polyester fibrous yarn
US7037097B2 (en) 2003-05-20 2006-05-02 Hills, Inc. Methods and apparatus for controlling airflow in a fiber extrusion system
WO2006024435A1 (en) * 2004-08-27 2006-03-09 Diolen Industrial Fibers B.V. Spinning method and device for carrying out said method
DE112008002207T5 (en) 2007-08-17 2010-09-09 Reliance Industries Ltd., Mumbai Endless polymeric filament yarn with improved fiber uniformity and increased productivity
EP2550381A2 (en) * 2010-03-24 2013-01-30 Oerlikon Textile GmbH & Co. KG Method and device for melt spinning and cooling a plurality of synthetic threads
CN102206879B (en) * 2011-05-28 2012-12-05 东华大学 Negative-pressure melt spinning method
US9127457B2 (en) * 2012-07-10 2015-09-08 King Saud University Machine for deforming and cutting plastic strips for enhancing concrete
CN103866406A (en) * 2013-10-30 2014-06-18 苏州龙杰特种纤维股份有限公司 Monofilament stepped cooling method
DE102016112394A1 (en) * 2015-07-17 2017-01-19 Oerlikon Textile Gmbh & Co. Kg Device for melt spinning and cooling a filament bundle
JP7154808B2 (en) * 2018-04-20 2022-10-18 株式会社ダイセル Spinning device and spinning method
DE102020109250A1 (en) * 2019-04-10 2020-10-15 Oerlikon Textile Gmbh & Co. Kg Process for melt spinning and cooling a wide variety of synthetic filaments
CN111893588B (en) * 2020-07-07 2021-06-08 诸暨永新色纺有限公司 Method for manufacturing ice-cold antibacterial POY (pre-oriented yarn)
DE102021001308A1 (en) 2021-03-11 2022-09-15 Oerlikon Textile Gmbh & Co. Kg Device for cooling a freshly extruded bundle of filaments
DE102021002103A1 (en) 2021-04-21 2022-10-27 Oerlikon Textile Gmbh & Co. Kg Device for cooling a large number of synthetic filaments
CN113755956B (en) * 2021-08-31 2023-06-13 界首市三宝宏达制线有限公司 Polypropylene fiber short yarn spinning equipment and spinning method
KR102420624B1 (en) * 2022-01-21 2022-07-13 이승수 Air-Cooled Cooling Part For Manufacturing Hose, And Hose Outer Peripheral Surface Coating System Having The Same
DE102022004931A1 (en) 2022-12-24 2024-06-27 Oerlikon Textile Gmbh & Co. Kg Device for cooling a plurality of synthetic filaments
CN117026397B (en) * 2023-10-09 2023-12-26 南通摩瑞纺织有限公司 Spinning cooling device

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838365A (en) * 1955-12-21 1958-06-10 Eastman Kodak Co Dry spinning process
US3611485A (en) * 1968-12-30 1971-10-12 Monsanto Co Spinning chimney
DE2053918B2 (en) * 1970-11-03 1976-09-30 Basf Farben + Fasern Ag, 2000 Hamburg METHOD AND DEVICE FOR THE PRODUCTION OF CURLED FEDES FROM SYNTHETIC HIGH POLYMER
JPS5134018B1 (en) * 1970-12-07 1976-09-24
US3999909A (en) * 1974-08-09 1976-12-28 Barmag Barmer Maschinenfabrik Aktiengesellschaft Spinning apparatus with pneumatic filament conveyor tube
US4204828A (en) * 1978-08-01 1980-05-27 Allied Chemical Corporation Quench system for synthetic fibers using fog and flowing air
US4687610A (en) * 1986-04-30 1987-08-18 E. I. Du Pont De Neumours And Company Low crystallinity polyester yarn produced at ultra high spinning speeds
JP2674656B2 (en) * 1988-03-24 1997-11-12 三井石油化学工業株式会社 Method and apparatus for cooling molten filament in spinning device
US5173310A (en) * 1988-03-24 1992-12-22 Mitsui Petrochemical Industries, Ltd. Device for cooling molten filaments in spinning apparatus
US5234327A (en) * 1988-08-24 1993-08-10 Viscosuisse S.A. Apparatus for melt spinning with high pull-off speeds and filament produced by means of the apparatus
US4970038A (en) * 1988-11-29 1990-11-13 Basf Corporation Process of preparing polyester yarn
ATE131224T1 (en) * 1991-09-06 1995-12-15 Akzo Nobel Nv DEVICE FOR RAPID SPINNING OF MULTIFILENT THREADS AND THE USE THEREOF.
TW268054B (en) * 1993-12-03 1996-01-11 Rieter Automatik Gmbh
US5976431A (en) 1993-12-03 1999-11-02 Ronald Mears Melt spinning process to produce filaments
DE19521466C2 (en) * 1995-06-13 1999-01-14 Reifenhaeuser Masch Plant for the production of a spunbonded nonwoven web from thermoplastic continuous filaments
TW476818B (en) * 1998-02-21 2002-02-21 Barmag Barmer Maschf Method and apparatus for spinning a multifilament yarn

Also Published As

Publication number Publication date
US20010015508A1 (en) 2001-08-23
TW530101B (en) 2003-05-01
DE59910596D1 (en) 2004-10-28
KR20010072017A (en) 2001-07-31
EP1102878A1 (en) 2001-05-30
JP4357119B2 (en) 2009-11-04
US6716014B2 (en) 2004-04-06
KR100574180B1 (en) 2006-04-27
CN1117186C (en) 2003-08-06
WO2000005439A1 (en) 2000-02-03
CN1309730A (en) 2001-08-22
JP2002521578A (en) 2002-07-16

Similar Documents

Publication Publication Date Title
EP1102878B1 (en) Spinning device and method for spinning a synthetic thread
EP1090170B1 (en) Spinner for spinning a synthetic thread
EP0937791B1 (en) Process and apparatus for the spinning of a multifilament yarn
EP2283174B1 (en) Method for melt-spinning, drawing, and winding up a multifilament, and apparatus for carrying out said method
EP1079008A1 (en) Process and apparatus for the spinning of a multifilament yarn
EP0940485B1 (en) Process and apparatus for spinning, drawing and winding up of a yarn
DE19535143B4 (en) Apparatus and method for the thermal treatment of fibers
EP1045930B1 (en) Method and device for producing a high oriented yarn
EP1228268B1 (en) Method for fusion spinning
DE19958245A1 (en) Melt spinning assembly for synthetic yarns has a godet roller box containing godet take-off and drawing roller units with a smooth and quiet transfer between them in a compact drafting field
EP1583855B1 (en) Method and device for spinning and crimping a synthetic thread
DE10109838A1 (en) Cooling system for synthetic filaments, includes annular permeable ducts promoting transverse cooling flow immediately following spinneret
DE19506369A1 (en) Heated synthetic yarn draw frame stops detrimental internal reactions
DE4220915A1 (en) Cooling filaments in high speed melt spinning - with cooling air supplied by entrainment in perforated first section of cooling chimney
DE10116294A1 (en) Melt-spinning thermoplastic filament bundles from nozzles to form composite thread, employs separate cooling for each bundle to differentiate crystallization
EP0826802A1 (en) Process for spinning multifilament yarns
EP0586630B1 (en) Process and device for producing continuous synthetic filaments
DE10005664A1 (en) Melt spinning assembly has larger spinneret drillings for the outer filaments which shroud the inner filaments in the cooling station but with a constant flow throughput of the molten polymer
EP1456441B1 (en) Method and device for producing a low-shrinking smooth yarn
DE19909073B4 (en) Apparatus and method for drawing a synthetic thread
DE10102730A1 (en) Filament melt spinning assembly, has an air guide system within the cooling tube to deflect cooling air flows away from the wall of the cooling tube to give a short cooling path for high speed filaments
DE19920177A1 (en) Melt spinning of continuous polymer filaments
DE4306925A1 (en) Apparatus for the melt-spinning of multifilament threads and its use
DE10323532A1 (en) Melt spin unit for producing thermoplastic polymer fibres, comprises a fibre cooling unit between a spin head and a winding unit, with a blower chamber and fibre shaft
DE10107232A1 (en) Spinning thermoplastic multifilament, by extrusion and cooling, employs melt containing modifier reducing cooling rate to protract setting

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010216

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20020219

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SAURER GMBH & CO. KG

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 59910596

Country of ref document: DE

Date of ref document: 20041028

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050120

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20050623

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080722

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080723

Year of fee payment: 10

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090721

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090721

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20100722

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20100723

Year of fee payment: 12

Ref country code: DE

Payment date: 20100816

Year of fee payment: 12

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110731

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120201

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59910596

Country of ref document: DE

Effective date: 20120201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110721