EP2135980B1 - Filament drawing device - Google Patents

Filament drawing device Download PDF

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Publication number
EP2135980B1
EP2135980B1 EP09162198A EP09162198A EP2135980B1 EP 2135980 B1 EP2135980 B1 EP 2135980B1 EP 09162198 A EP09162198 A EP 09162198A EP 09162198 A EP09162198 A EP 09162198A EP 2135980 B1 EP2135980 B1 EP 2135980B1
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EP
European Patent Office
Prior art keywords
guide means
bores
slot
conveying direction
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.)
Not-in-force
Application number
EP09162198A
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German (de)
French (fr)
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EP2135980A3 (en
EP2135980A2 (en
Inventor
Holger SCHÖTTLER
Dimitrios Sapouridis
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
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Oerlikon Textile GmbH and Co KG
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Publication of EP2135980A2 publication Critical patent/EP2135980A2/en
Publication of EP2135980A3 publication Critical patent/EP2135980A3/en
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Publication of EP2135980B1 publication Critical patent/EP2135980B1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • the invention relates to a device for removing a plurality of filaments according to the preamble of claim 1.
  • a molten polymer supplied from an extruder is spun in a spinning beam through a plurality of nozzle bores arranged in one or more rows in a row to form a multiplicity of filaments and then cooled by means of a cooling device.
  • a pulling force is exerted by a device disposed at a distance thereunder, the draw-off nozzle in the form of a slot, which effects a drawing and conveying of the filaments.
  • compressed air flows in the conveying direction of the filaments from the inner wall of the draw-off nozzle, whereby the desired tensile force is exerted on the filaments.
  • the filaments settle on a conveyor belt arranged below the discharge nozzle in random position and form the fleece there.
  • a finger strip with a castellated cross-section extending over the width of the draw-off nozzle is provided on the outlet side of the draw-off nozzle.
  • a further object of the invention is to ensure the flexible adaptability of the draw-off nozzle to different process parameters, so that an optimal setting is more easily achieved.
  • the discharge nozzle on its underside on a conducting means which extends over the length of the slot on the outlet side.
  • This guide means is provided with a plurality of bores, which connect the exit area with the environment, thus allowing the passive exchange of air.
  • guide means with bores are provided on both sides of the slot.
  • the conducting means In a particularly advantageous embodiment of the invention is one of the conducting means or are both conducting means with respect to their angle to the conveying direction adjustable.
  • the effect of the conductive agent can be adjusted very sensitively and thus optimally adapted to the process.
  • a preferred embodiment of the invention includes a plurality of rows of holes in which the holes are introduced.
  • a part of the holes above and another part of the holes below the lower edge of the opposite guide means is arranged.
  • a likewise uniform flow is achieved when provided below the holes inside grooves without connection to the holes.
  • the holes are led out transversely to the conveying direction at an angle of 10 to 60 ° obliquely.
  • the lateral velocity component of the incoming air exerts a spin on the filaments, which favors the formation of the random orientation.
  • a further embodiment provides in the conveying direction obliquely arranged holes, which are provided in or against the conveying direction at an angle between 10 and 60 °. As a result, a targeted inflow or outflow of the air can be supported.
  • FIG. 1 the device according to the invention for melt-spinning and stripping filaments to a spunbonded fabric is shown.
  • a melt source 1 for example an extruder
  • molten polymer is fed via the melt line 2 to a spinning device 3.
  • the spinning device 3 does not include here a pump for increasing the pressure and metering of the melt.
  • spinnerets 4 are provided, through which the melt is extruded into thin filaments that leave the spinning device 3 in the form of a filament 5.
  • the spinnerets 4 can be introduced, for example, in several spinneret plates, which are arranged perpendicular to the plane one behind the other. They are perpendicular to the drawing plane order of magnitude more spinnerets 4 than in the plane and in FIG. 1 shown.
  • the filament bundle 5 thus has the form of a curtain which extends perpendicular to the plane of the drawing.
  • draw-off nozzle 6 which also extends perpendicular to the plane of the drawing across the width of the filament 5.
  • a cooling device Above the draw-off nozzle 6 may be a cooling device.
  • the task of the draw-off nozzle 6 is to exert a pulling force on the filament bundle 5 and to convey it.
  • the filament bundle 5 is guided through a funnel-shaped inlet region 7 into the take-off region 8.
  • a compressed air supply 9 is provided on both sides, is supplied via the compressed air, which is guided at an acute angle in the take-off area and there exerts a tensile force on the filament bundle.
  • the deduction area 8 forms a slot 10 which extends perpendicular to the plane of the drawing.
  • a conveyor belt 19 is provided, on which the filament bundle is deposited and transported to a fleece 18.
  • the guide means 13 and 15 by means of the receptacles 11 and 12 are attached.
  • the optional receptacles 11 and 12 thereby enable the fast and flexible mounting of the guide means 13 and 15.
  • the guide means 13 and 15 can be easily exchanged for other guide means with deviating geometry and adapted to changing process parameters.
  • the guide means 13 and 15 are positioned so that the slot 10 continues below the take-off area.
  • the guide means 13 has perpendicular to the plane of a plurality of grooves 14 which extend in the conveying direction of the discharge nozzle, wherein the groove depth in Conveying direction increased. As a result, a more uniform outflow of air is achieved from the discharge nozzle 6, so that the filaments are distributed more uniformly on the conveyor belt 19 and thus a more uniform web 18 is generated.
  • a further conducting means 15 in the form of a thin-walled strip with a plurality of bores 16 is provided opposite the conducting means 13.
  • the holes 16 connect the space below the take-off area 8 of the discharge nozzle 6 with the environment and thus allow an exchange of air with the environment. As a result, an aerodynamically particularly uniform transition from the take-off region 7 to the environment is achieved. Due to the double-row arrangement of the rows of holes 16 shown here, wherein the lower rows of holes are positioned below the lower edge 20 of the guide means 13, this air exchange can take place particularly uniformly.
  • 2 conducting means 15 with bores 16 can also be arranged on both sides of the slot 10.
  • FIG. 2 Once again, the two conducting means 13 and 15 are off FIG. 1 shown.
  • the arrangement of the holes 16 in the guide means 15 opposite to in FIG. 1 shown arrangement is a variant.
  • three rows of holes are provided, which are each arranged above the lower edge 20 of the guide means 14.
  • the guide means 13 has a plurality of grooves 14 and webs 27. Parallel to the increasing in the conveying direction depth of the grooves 14 widen the webs 27 in the form of a dovetail.
  • Threaded holes 28 in the guide means 15 and not visible here in the guide means 13 allow easy mounting of the conductive means.
  • FIG. 3 shows a variant of the receptacle 12 from FIG. 1 ,
  • the joint receptacle 21 shown here has a joint 22 which rotatably supports the guide means 15.
  • FIG. 4 shows a particularly advantageous arrangement of the rows of holes in a plan view. Experiments have shown that with this arrangement particularly uniform nonwovens can be produced when three rows of holes above and three rows of holes below the lower edge 20 of the guide 13 are arranged.
  • FIG. 5 shows an embodiment of the bores 16, which have a conical outlet opening 23. As a result, the air flowing through the holes 16 air is evenly distributed in the lower region of the slot 10.
  • FIG. 6 shows the view of an alternative embodiment of the guide means 15 in the conveying direction.
  • the holes 16 are arranged opposite to the orthogonal 26 of the guide means 15 rotated at an angle ⁇ .
  • a swirl effect can be exerted on the filaments.
  • FIG. 7 shows a further alternative embodiment of the guide means 15.
  • the upper row of holes is aligned in the conveying direction relative to the orthogonal 26 of the guide means 15 at an inflow angle ⁇ , the lower row of holes at an oppositely directed outflow angle ⁇ .
  • FIGS. 8 and 9 represent a further development of the guide means 15.
  • the lower row of holes is provided with grooves 24 which are directly connected to the lower holes 16.
  • the incoming air can be evenly distributed over the length of the slot 10.
  • the grooves 25 are arranged at a distance below the rows of holes.

Abstract

The device has a drawing nozzle (6) forming a slot (10). Filaments (5) provided by an upstream spinning device (3) are guided by the drawing nozzle. The drawing nozzle is formed such that a tractive force is applied for drawing the filaments using compressed air. A conducting unit (15) extending over the length of the slot is arranged at a lower side of the drawing nozzle at a side of the slot. The conducting unit is provided with a set of boreholes (16) that connect a region below the slot with environment in a passive manner.

Description

Die Erfindung betrifft eine Vorrichtung zum Abziehen einer Vielzahl von Filamenten gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for removing a plurality of filaments according to the preamble of claim 1.

Aus der US 2006/0172024 ist eine gattungsgemäße Vorrichtung zum Herstellen eines Spinnvlieses bekannt. Zum Herstellen eines Spinnvlieses wird ein von einem Extruder zugeführtes schmelzflüssiges Polymer in einem Spinnbalken durch ein- oder mehrreihig linienförmig angeordnete Düsenbohrungen zu einer Vielzahl von Filamenten gesponnen und anschließend mittels einer Abkühlvorrichtung abgekühlt. Auf die Filamente wird durch eine in einem Abstand darunter angeordnete Vorrichtung um Abziehen, der Abzugsdüse in der Form eines Schlitzes, eine Zugkraft ausgeübt, die eine Verstreckung und Förderung der Filamente bewirkt. Dazu strömt aus der Innenwand der Abzugsdüse Druckluft in Förderrichtung der Filamente, wodurch die gewünschte Zugkraft auf die Filamente ausgeübt wird. Die Filamente legen sich auf einem unterhalb der Abzugdüse angeordneten Förderband in Wirrlage ab und bilden dort das Vlies.From the US 2006/0172024 is a generic device for producing a spunbonded known. For producing a spunbonded nonwoven fabric, a molten polymer supplied from an extruder is spun in a spinning beam through a plurality of nozzle bores arranged in one or more rows in a row to form a multiplicity of filaments and then cooled by means of a cooling device. To the filaments, a pulling force is exerted by a device disposed at a distance thereunder, the draw-off nozzle in the form of a slot, which effects a drawing and conveying of the filaments. For this purpose, compressed air flows in the conveying direction of the filaments from the inner wall of the draw-off nozzle, whereby the desired tensile force is exerted on the filaments. The filaments settle on a conveyor belt arranged below the discharge nozzle in random position and form the fleece there.

Um die Luftströmung und die Filamente beim Austritt aus der Abzugsdüse so zu beeinflussen, dass die Ablage der Filamente besonders gleichmäßig erfolgt, ist an der Austrittsseite der Abzugsdüse eine sich über die Breite der Abzugsdüse erstreckende Fingerleiste mit einem zinnenförmigen Querschnitt vorgesehen.In order to influence the air flow and the filaments at the exit from the draw-off nozzle so that the deposition of the filaments takes place particularly uniformly, a finger strip with a castellated cross-section extending over the width of the draw-off nozzle is provided on the outlet side of the draw-off nozzle.

Trotz dieser Maßnahme besteht immer noch das Risiko, dass sich durch ungleichmäßige Ablage der Filamente im Spinnvlies Dünnstellen sowie die Bildung von Filamentbündeln im Spinnvlies ergeben.Despite this measure, there is still the risk that thin spots as well as the formation of filament bundles in the spunbonded fabric result from uneven deposition of the filaments in the spunbonded nonwoven.

Es ist daher Aufgabe der Erfindung, eine verbesserte Abzugsdüse zum Sicherstellen einer gleichmäßigen Fadenablage bereitzustellen. Eine weitere Aufgabe der Erfindung ist es, die flexible Anpassbarkeit der Abzugsdüse an verschiedene Prozessparameter zu gewährleisten, so dass leichter eine optimale Einstellung erreicht wird.It is therefore an object of the invention to provide an improved withdrawal nozzle for ensuring a uniform yarn deposit. A further object of the invention is to ensure the flexible adaptability of the draw-off nozzle to different process parameters, so that an optimal setting is more easily achieved.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung gemäß dem Anspruch 1 sowie den abhängigen Ansprüchen gelöst.This object is achieved by a device according to claim 1 and the dependent claims.

Dazu weist die Abzugsdüse an ihrer Unterseite ein Leitmittel auf, das sich über die Länge des Schlitzes an der Austrittsseite erstreckt. Dieses Leitmittel ist mit einer Vielzahl von Bohrungen versehen, die den Austrittsbereich mit der Umgebung verbinden und so den passiven Luftaustausch ermöglichen. Dadurch wird die schlagartige Expansion der Förderluft in der Umgebung abgemildert, da sich die Druckverhältnisse unmittelbar am Austritt der Abzugsdüse gleichmäßiger an die Druckverhältnisse der Umgebung anpassen können.For this purpose, the discharge nozzle on its underside on a conducting means which extends over the length of the slot on the outlet side. This guide means is provided with a plurality of bores, which connect the exit area with the environment, thus allowing the passive exchange of air. As a result, the sudden expansion of the conveying air in the environment is mitigated, since the pressure conditions directly at the outlet of the discharge nozzle can adapt more uniformly to the pressure conditions of the environment.

Es hat sich überraschenderweise gezeigt, dass gerade durch die Kombination eines Leitmittels mit Nuten in Förderrichtung an der Auslassseite der Abzugsdüse auf der einen Seite des Schlitzes und eines Leitmittels mit Bohrungen auf der anderen Seite im Vergleich zu nur einem Leitmittel besondere Vorteile erzielt werden.It has surprisingly been found that particular advantages are achieved in particular by the combination of a conductive agent with grooves in the conveying direction at the outlet side of the discharge nozzle on one side of the slot and a conductive agent with holes on the other side compared to only one guide.

In einer alternativen Ausführungsform sind auf beiden Seiten des Schlitzes Leitmittel mit Bohrungen vorgesehen.In an alternative embodiment, guide means with bores are provided on both sides of the slot.

In einer besonders vorteilhaften Weiterbildung der Erfindung ist eines der Leitmittel oder sind beide Leitmittel hinsichtlich ihres Winkels zur Förderrichtung einstellbar. Hierdurch kann die Wirkung des Leitmittels besonders feinfühlig eingestellt werden und so optimal an den Prozess angepasst werden.In a particularly advantageous embodiment of the invention is one of the conducting means or are both conducting means with respect to their angle to the conveying direction adjustable. As a result, the effect of the conductive agent can be adjusted very sensitively and thus optimally adapted to the process.

Eine bevorzugte Ausführungsvariante der Erfindung enthält mehrere Lochreihen, in denen die Bohrungen eingebracht sind.A preferred embodiment of the invention includes a plurality of rows of holes in which the holes are introduced.

In einer besonders bevorzugten Weiterbildung ist ein Teil der Bohrungen oberhalb und ein anderer Teil der Bohrungen unterhalb der Unterkante des gegenüberliegenden Leitmittels angeordnet. Hierdurch wird ein besonders gleichmäßiger Luftaustausch mit der Umgebung erreicht.In a particularly preferred embodiment, a part of the holes above and another part of the holes below the lower edge of the opposite guide means is arranged. As a result, a particularly uniform air exchange with the environment is achieved.

Durch eine Aufweitung der Bohrungen zur Innenseite der beiden Leitmittel wird ein sanftes Einströmen der Luft erreicht.By widening the holes to the inside of the two guide means, a gentle inflow of air is achieved.

Dieses Ziel wird auch erreicht durch in innenseitige Nuten, die sich in Förderrichtung von den Bohrungen aus erstrecken.This goal is also achieved by inside grooves that extend in the conveying direction of the holes.

Eine ebenfalls gleichmäßige Strömung wird erreicht, wenn unterhalb der Bohrungen innenseitige Nuten ohne Verbindung zu den Bohrungen vorgesehen sind.A likewise uniform flow is achieved when provided below the holes inside grooves without connection to the holes.

In einer Ausführungsvariante sind die Bohrungen quer zur Förderrichtung in einem Winkel von 10 bis 60 ° schräg herausgeführt. Die seitliche Geschwindigkeitskomponente der einströmenden Luft übt einen Drall auf die Filamente aus, was die Bildung der Wirrlage begünstigt.In one embodiment, the holes are led out transversely to the conveying direction at an angle of 10 to 60 ° obliquely. The lateral velocity component of the incoming air exerts a spin on the filaments, which favors the formation of the random orientation.

Eine weitere Ausführungsvariante sieht in Förderrichtung schräg angeordnete Bohrungen vor, die in oder entgegen der Förderrichtung unter einem Winkel zwischen 10 und 60 ° vorgesehen sind. Hierdurch kann gezielt ein Ein- oder Ausströmen der Luft unterstützt werden.A further embodiment provides in the conveying direction obliquely arranged holes, which are provided in or against the conveying direction at an angle between 10 and 60 °. As a result, a targeted inflow or outflow of the air can be supported.

Auch wenn erfindungsgemäß jeder Winkel größer 0 ° eingeschlossen ist, wird die untere Grenze von 10 ° gewählt, um damit eine Querkomponente zu erhalten. Winkel oberhalb 60 ° sind fertigungstechnisch nur mit hohem Aufwand herzustellen.Even if, according to the invention, every angle greater than 0 ° is included, the lower limit of 10 ° is chosen so as to obtain a transverse component. Angle above 60 ° are manufacturing technology to produce only with great effort.

Optimale Ergebnisse werden mit der erfindungsgemäßen Vorrichtung erreicht, wenn der Bohrungsdurchmesser im Bereich von 0,5 bis 10 mm liegt.Optimum results are achieved with the device according to the invention when the bore diameter is in the range of 0.5 to 10 mm.

Ein Ausführungsbeispiel wird im Folgenden unter Hinweis auf die beigefügten Zeichnungen näher beschrieben.An embodiment will be described in more detail below with reference to the accompanying drawings.

Es stellen dar:

  • Figur 1: eine erfindungsgemäße Vorrichtung zum Schmelzspinnen und Abziehen von Filamenten zu einem Spinnvlies,
  • Figur 2: die an der Unterseite der Abzugsdüse vorgesehenen Leitmittel,
  • Figur 3: eine Ausführungsvariante der Befestigung des Leitmittels,
  • Figuren 4 bis 9: Ausführungsvarianten des Leitmittels.
They show:
  • FIG. 1 a device according to the invention for melt-spinning and stripping filaments into a spunbonded non-woven fabric,
  • FIG. 2 the guiding means provided on the underside of the draw-off nozzle,
  • FIG. 3 a variant of the attachment of the conductive agent,
  • FIGS. 4 to 9 : Variants of the conductive agent.

In Figur 1 ist die erfindungsgemäße Vorrichtung zum Schmelzspinnen und Abziehen von Filamenten zu einem Spinnvlies dargestellt. Von einer Schmelzequelle 1, beispielsweise einem Extruder, wird schmelzflüssiges Polymer über die Schmelzeleitung 2 einer Spinneinrichtung 3 zugeführt. Die Spinneinrichtung 3 enthält hier nicht dargestellt eine Pumpe zum Druckerhöhen und Dosieren der Schmelze. An der Unterseite der Spinneinrichtung 3 sind Spinndüsen 4 vorgesehen, durch die die Schmelze zu dünnen Filamenten extrudiert wird, die die Spinneinrichtung 3 in Form einer Filamentschar 5 verlassen. Die Spinndüsen 4 können beispielsweise in mehreren Spinndüsenplatten eingebracht sein, die senkrecht zur Zeichenebene hintereinander angeordnet sind. Dabei sind senkrecht zur Zeichenebene um Größenordnungen mehr Spinndüsen 4 vorgesehen als in der Zeichenebene und in Figur 1 dargestellt. Die Filamentschar 5 weist somit die Form eines Vorhangs auf, der sich senkrecht zur Zeichenebene erstreckt.In FIG. 1 the device according to the invention for melt-spinning and stripping filaments to a spunbonded fabric is shown. From a melt source 1, for example an extruder, molten polymer is fed via the melt line 2 to a spinning device 3. The spinning device 3 does not include here a pump for increasing the pressure and metering of the melt. On the underside of the spinning device 3 spinnerets 4 are provided, through which the melt is extruded into thin filaments that leave the spinning device 3 in the form of a filament 5. The spinnerets 4 can be introduced, for example, in several spinneret plates, which are arranged perpendicular to the plane one behind the other. They are perpendicular to the drawing plane order of magnitude more spinnerets 4 than in the plane and in FIG. 1 shown. The filament bundle 5 thus has the form of a curtain which extends perpendicular to the plane of the drawing.

Unterhalb der Spinneinrichtung 3 befindet sich die Abzugsdüse 6, die sich ebenfalls senkrecht zur Zeichenebene über die Breite der Filamentschar 5 erstreckt. Oberhalb der Abzugsdüse 6 kann sich eine Abkühlvorrichtung befinden.Below the spinning device 3 is the draw-off nozzle 6, which also extends perpendicular to the plane of the drawing across the width of the filament 5. Above the draw-off nozzle 6 may be a cooling device.

Die Aufgabe der Abzugsdüse 6 ist es, eine Zugkraft auf die Filamentschar 5 auszuüben und sie zu fördern. Dazu wird die Filamentschar 5 durch einen trichterförmigen Einlaufbereich 7 in den Abzugsbereich 8 geführt. Im Abzugsbereich 8 ist beidseitig eine Druckluftzufuhr 9 vorgesehen, über die Druckluft zugeführt wird, welche unter spitzen Winkel in den Abzugsbereich geführt wird und dort eine Zugkraft auf die Filamentschar ausübt. Der Abzugsbereich 8 bildet einen Schlitz 10, der sich senkrecht zur Zeichenebene erstreckt.The task of the draw-off nozzle 6 is to exert a pulling force on the filament bundle 5 and to convey it. For this purpose, the filament bundle 5 is guided through a funnel-shaped inlet region 7 into the take-off region 8. In the exhaust area 8, a compressed air supply 9 is provided on both sides, is supplied via the compressed air, which is guided at an acute angle in the take-off area and there exerts a tensile force on the filament bundle. The deduction area 8 forms a slot 10 which extends perpendicular to the plane of the drawing.

Unterhalb der Abzugsdüse 6 ist ein Förderband 19 vorgesehen, auf welchem die Filamentschar zu einem Vlies 18 abgelegt und transportiert wird.Below the draw-off nozzle 6, a conveyor belt 19 is provided, on which the filament bundle is deposited and transported to a fleece 18.

Direkt unterhalb und verbunden mit der Abzugsdüse 6 sind die Leitmittel 13 und 15 mit Hilfe der Aufnahmen 11 und 12 angebracht. Die optionalen Aufnahmen 11 und 12 ermöglichen dabei die schnelle und flexible Montage der Leitmittel 13 und 15. Dadurch können die Leitmittel 13 und 15 leicht gegen andere Leitmittel mit abweichender Geometrie ausgetauscht und an veränderte Verfahrensparameter angepasst werden. Die Leitmittel 13 und 15 sind so positioniert, dass der Schlitz 10 unterhalb des Abzugsbereiches fortgesetzt wird.Directly below and connected to the discharge nozzle 6, the guide means 13 and 15 by means of the receptacles 11 and 12 are attached. The optional receptacles 11 and 12 thereby enable the fast and flexible mounting of the guide means 13 and 15. As a result, the guide means 13 and 15 can be easily exchanged for other guide means with deviating geometry and adapted to changing process parameters. The guide means 13 and 15 are positioned so that the slot 10 continues below the take-off area.

Das Leitmittel 13 weist senkrecht zur Zeichenebene eine Vielzahl von Nuten 14 auf, die in Förderrichtung der Abzugsdüse verlaufen, wobei sich die Nuttiefe in Förderrichtung vergrößert. Hierdurch wird ein gleichmäßigeres Abströmen der Luft aus der Abzugsdüse 6 erreicht, so dass die Filamente gleichmäßiger auf dem Förderband 19 verteilt werden und somit ein gleichmäßigeres Vlies 18 erzeugt wird. Zusätzlich ist gegenüber dem Leitmittel 13 ein weiteres Leitmittel 15 in Form eines dünnwandigen Streifens mit einer Vielzahl von Bohrungen 16 vorgesehen. Die Bohrungen 16 verbinden dabei den Raum unterhalb des Abzugsbereiches 8 der Abzugsdüse 6 mit der Umgebung und ermöglichen so ein Luftaustausch mit der Umgebung. Hierdurch wird ein aerodynamisch besonders gleichmäßiger Übergang aus dem Abzugsbereich 7 in die Umgebung erreicht. Aufgrund der hier dargestellten zweireihigen Anordnung der Lochreihen 16, wobei die untere Lochreihen unterhalb der Unterkante 20 des Leitmittels 13 positioniert ist, kann dieser Luftaustausch besonders gleichmäßig erfolgen.The guide means 13 has perpendicular to the plane of a plurality of grooves 14 which extend in the conveying direction of the discharge nozzle, wherein the groove depth in Conveying direction increased. As a result, a more uniform outflow of air is achieved from the discharge nozzle 6, so that the filaments are distributed more uniformly on the conveyor belt 19 and thus a more uniform web 18 is generated. In addition, a further conducting means 15 in the form of a thin-walled strip with a plurality of bores 16 is provided opposite the conducting means 13. The holes 16 connect the space below the take-off area 8 of the discharge nozzle 6 with the environment and thus allow an exchange of air with the environment. As a result, an aerodynamically particularly uniform transition from the take-off region 7 to the environment is achieved. Due to the double-row arrangement of the rows of holes 16 shown here, wherein the lower rows of holes are positioned below the lower edge 20 of the guide means 13, this air exchange can take place particularly uniformly.

Alternativ zu der hier dargestellten Anordnung können auch 2 Leitmittel 15 mit Bohrungen 16 auf beiden Seiten des Schlitzes 10 angeordnet werden.As an alternative to the arrangement shown here, 2 conducting means 15 with bores 16 can also be arranged on both sides of the slot 10.

In Figur 2 sind noch einmal die beiden Leitmittel 13 und 15 aus Figur 1 dargestellt. Die Anordnung der Löcher 16 im Leitmittel 15 stellen gegenüber der in Figur 1 gezeigten Anordnung eine Variante dar. Es sind hier drei Lochreihen vorgesehen, die jeweils oberhalb der Unterkante 20 des Leitmittels 14 angeordnet sind. Das Leitmittel 13 weist eine Vielzahl von Nuten 14 und Stegen 27 auf. Parallel zu der in Förderrichtung zunehmenden Tiefe der Nuten 14 verbreitern sich die Stege 27 in Form eines Schwalbenschwanzes.In FIG. 2 Once again, the two conducting means 13 and 15 are off FIG. 1 shown. The arrangement of the holes 16 in the guide means 15 opposite to in FIG. 1 shown arrangement is a variant. Here, three rows of holes are provided, which are each arranged above the lower edge 20 of the guide means 14. The guide means 13 has a plurality of grooves 14 and webs 27. Parallel to the increasing in the conveying direction depth of the grooves 14 widen the webs 27 in the form of a dovetail.

Gewindebohrungen 28 im Leitmittel 15 und hier nicht sichtbar im Leitmittel 13 ermöglichen die einfache Montage der Leitmittel.Threaded holes 28 in the guide means 15 and not visible here in the guide means 13 allow easy mounting of the conductive means.

Figur 3 zeigt eine Variante der Aufnahme 12 aus Figur 1. Die hier dargestellte Gelenkaufnahme 21 weist ein Gelenk 22 auf, das das Leitmittel 15 drehbar trägt. FIG. 3 shows a variant of the receptacle 12 from FIG. 1 , The joint receptacle 21 shown here has a joint 22 which rotatably supports the guide means 15.

Hierdurch ist eine besonders einfache Anpassung an Verfahrensparameter möglich, in dem das Leitmittel 15 um das Gelenk 22 geschwenkt wird.As a result, a particularly simple adaptation to process parameters is possible, in which the guide means 15 is pivoted about the joint 22.

Figur 4 stellt eine besonders vorteilhafte Anordnung der Lochreihen in einer Draufsicht dar. In Versuchen hat sich gezeigt, dass mit dieser Anordnung besonders gleichmäßige Vliese hergestellt werden können, wenn jeweils drei Lochreihen oberhalb und drei Lochreihen unterhalb der Unterkante 20 des Leitmittels 13 angeordnet sind. FIG. 4 shows a particularly advantageous arrangement of the rows of holes in a plan view. Experiments have shown that with this arrangement particularly uniform nonwovens can be produced when three rows of holes above and three rows of holes below the lower edge 20 of the guide 13 are arranged.

Figur 5 zeigt eine Ausführungsform der Bohrungen 16, die eine kegelförmige Austrittsöffnung 23 aufweisen. Hierdurch wird die durch die Bohrungen 16 abströmende Luft gleichmäßig im unteren Bereich des Schlitzes 10 verteilt. FIG. 5 shows an embodiment of the bores 16, which have a conical outlet opening 23. As a result, the air flowing through the holes 16 air is evenly distributed in the lower region of the slot 10.

Figur 6 zeigt die Ansicht einer alternativen Ausführungsform des Leitmittels 15 in Förderrichtung. Die Bohrungen 16 sind gegenüber der Orthogonalen 26 des Leitmittels 15 unter einem Anstellwinkel α verdreht angeordnet. Hierdurch kann zusätzlich ein Dralleffekt auf die Filamente ausgeübt werden. FIG. 6 shows the view of an alternative embodiment of the guide means 15 in the conveying direction. The holes 16 are arranged opposite to the orthogonal 26 of the guide means 15 rotated at an angle α. As a result, in addition, a swirl effect can be exerted on the filaments.

Figur 7 zeigt eine weitere alternative Ausführungsform des Leitmittels 15. Die obere Lochreihe ist in Förderrichtung gegenüber der Orthogonalen 26 des Leitmittels 15 unter einem Einströmwinkel β, die untere Lochreihe unter einem entgegengesetzt gerichteten Ausströmwinkel γ ausgerichtet. Hierdurch kann an das Ein- und Ausströmverhalten der Luft in den Schlitz 10 besonders begünstigt werden. FIG. 7 shows a further alternative embodiment of the guide means 15. The upper row of holes is aligned in the conveying direction relative to the orthogonal 26 of the guide means 15 at an inflow angle β, the lower row of holes at an oppositely directed outflow angle γ. As a result, the inflow and outflow behavior of the air into the slot 10 can be particularly favored.

Die Figuren 8 und 9 stellen eine Weiterentwicklung des Leitmittels 15 dar. In Figur 8 ist die untere Lochreihe mit Nuten 24 versehen, die direkt mit den unteren Bohrungen 16 verbunden sind. Hierdurch kann die einströmende Luft sich gleichmäßig über die Länge des Schlitzes 10 verteilen. Hingegen sind in Figur 9 die Nuten 25 mit einem Abstand unterhalb der Lochreihen angeordnet.The FIGS. 8 and 9 represent a further development of the guide means 15. In Figure 8, the lower row of holes is provided with grooves 24 which are directly connected to the lower holes 16. As a result, the incoming air can be evenly distributed over the length of the slot 10. On the other hand are in FIG. 9 the grooves 25 are arranged at a distance below the rows of holes.

Auch wenn die alternativen Ausführungsformen in den Figuren 5 und 7 bis 9 nur jeweils zwei Lochreihen zeigen, sind diese Ausführungsformen auch für jede andere beliebige Anzahl von Lochreihen und Anordnungen der Löcher 16 möglich.Although the alternative embodiments in the Figures 5 and 7 to 9 show only two rows of holes, these embodiments are also possible for any other arbitrary number of rows of holes and arrangements of the holes 16.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Schmelzequellemelt source
22
Schmelzeleitungmelt line
33
Spinneinrichtungspinner
44
Spinndüsenspinnerets
55
Filamentscharfilament bundle
66
Abzugsdüsenavel
77
Einlaufbereichintake area
88th
Abzugsbereichremoval area
99
DruckluftzufuhrCompressed air supply
1010
Schlitzslot
1111
Aufnahmeadmission
1212
Aufnahmeadmission
1313
Leitmittelguide means
1414
Nutgroove
1515
Leitmittelguide means
1616
Bohrungdrilling
1717
Schraubverbindungscrew
1818
Vliesfleece
1919
Förderbandconveyor belt
2020
Unterkante des LeitmittelsLower edge of the conductive agent
2121
Gelenkaufnahmejoint Taping
2222
Gelenkjoint
2323
Austrittsöffnungoutlet opening
2424
Nutgroove
2525
Nutgroove
2626
Orthogonale des LeitmittelsOrthogonal of the conductive agent
2727
Stegweb
2828
Gewindebohrungthreaded hole
αα
Anstellwinkelangle of attack
ββ
Einströmwinkelinflow
γγ
Ausströmwinkeloutflow

Claims (14)

  1. A device for drawing filaments (5) for the formation of a spun-bonded fabric,
    having a drawing nozzle (6) forming a slot (10), by means of which the filaments fed upstream of a spinning unit (3) can be fed,
    wherein the drawing nozzle (6) is embodied such that a tensile force can be exerted for drawing the filaments (5) via compressed air,
    and wherein a guide means (15) is arranged on the base of the drawing nozzle on a side of the slot (10), extending across the length of the slot (10),
    characterized in that
    the guide means (15) is equipped with a plurality of bores (16), and that the bores connect the space below the slot (10) to the environment such to enable a passive exchange of air.
  2. The device according to claim 1,
    characterized in that
    a further guide means (13) extending across the length of the slot (10) is arranged on the side of the guide means (15) on the opposite side of the slot, having a plurality of notches (14) aligned parallel to the conveying direction of the drawing nozzle.
  3. The device according to claim 1,
    characterized in that
    a guide means (15) having a plurality of bores (16) is provided on both sides of the slot.
  4. The device according to one of the claims 1 to 3,
    characterized in that
    the angular adjustment of at least one of the guide means (13, 15) can be adjusted as opposed to the conveying direction of the drawing nozzle.
  5. The device according to one of the previous claims,
    characterized in that
    the bores (16) in the guide means (15) are inserted in multiple rows.
  6. The device according to claim 5,
    characterized in that
    part of the bores (16) is above the lower edge (20) of the guide means on the opposite side of the slot as viewed in the conveying direction, and part is located beneath the lower edge (20).
  7. The device according to one of the previous claims,
    characterized in that
    at least part of the bores (16) expands toward the interior of the guide means (15).
  8. The device according to one of the previous claims,
    characterized in that
    at least part of the bores (16) each end on the interior of the guide means (15) in a notch (24) extending in the conveying direction of the filaments.
  9. The device according to one of the previous claims,
    characterized in that
    the guide means (15) has notches (25) beneath the bores (16).
  10. The device according to one of the previous claims,
    characterized in that
    at least part of the bores (16) of the guide means (15) has an angle (a) of greater than 0° to the orthogonal (26) of the guide means (15) transverse to the conveying direction.
  11. The device according to claim 10,
    characterized in that
    the angle (α) is 10° to 60° transverse to the conveying direction.
  12. The device according to one of the previous claims,
    characterized in that
    the at least one part of the bores (16) of the guide means (15) has an angle (β, γ) of greater than 0° to the orthogonal (26) of the guide means (15) in or against the conveying direction.
  13. The device according to claim 12,
    characterized in that
    the angle (β, γ) in or against the conveying direction is 10° to 60°.
  14. The device according to one of the previous claims,
    Characterized in that the diameter of the bores is 0.5 to 10 mm.
EP09162198A 2008-06-21 2009-06-08 Filament drawing device Not-in-force EP2135980B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008029550A DE102008029550A1 (en) 2008-06-21 2008-06-21 Apparatus for stripping filaments

Publications (3)

Publication Number Publication Date
EP2135980A2 EP2135980A2 (en) 2009-12-23
EP2135980A3 EP2135980A3 (en) 2010-07-07
EP2135980B1 true EP2135980B1 (en) 2011-08-17

Family

ID=41152050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09162198A Not-in-force EP2135980B1 (en) 2008-06-21 2009-06-08 Filament drawing device

Country Status (5)

Country Link
US (1) US8186986B2 (en)
EP (1) EP2135980B1 (en)
CN (1) CN101608380B (en)
AT (1) ATE520805T1 (en)
DE (1) DE102008029550A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8246898B2 (en) * 2007-03-19 2012-08-21 Conrad John H Method and apparatus for enhanced fiber bundle dispersion with a divergent fiber draw unit
EP2584076B1 (en) * 2011-10-22 2017-01-11 Oerlikon Textile GmbH & Co. KG Device and method for guiding and depositing synthetic filaments onto a non-woven fabric
CN103789927B (en) * 2014-01-24 2017-02-15 廊坊中纺新元无纺材料有限公司 Manufacturing method of spun-laid non-woven fabric
US20240025664A1 (en) * 2022-07-22 2024-01-25 Lawrence Equipment Inc. Continuous conveyor belt

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766606A (en) * 1972-04-19 1973-10-23 Du Pont Apparatus for forwarding tow
US6379136B1 (en) * 1999-06-09 2002-04-30 Gerald C. Najour Apparatus for production of sub-denier spunbond nonwovens
FR2815647B1 (en) * 2000-10-20 2003-02-14 Rieter Perfojet INSTALLATION FOR PRODUCING A NONWOVEN FABRIC WITH A DIFFUSER AND FOR SEPARATING FILAMENTS ELECTROSTATICALLY
FR2825381B1 (en) * 2001-05-31 2003-11-14 Rieter Perfojet INSTALLATION FOR PRODUCING A NON-WOVEN, VERY REGULAR WEIGHT TABLECLOTH
US20060145385A1 (en) * 2002-06-03 2006-07-06 Takashi Fujii Device and method for manufacturing thread line
US7320581B2 (en) * 2003-11-17 2008-01-22 Aktiengesellschaft Adolph Saurer Stabilized filament drawing device for a meltspinning apparatus
US7172398B2 (en) 2003-11-17 2007-02-06 Aktiengesellschaft Adolph Saurer Stabilized filament drawing device for a meltspinning apparatus and meltspinning apparatus including such stabilized filament drawing devices
JP4419685B2 (en) * 2004-05-31 2010-02-24 東レ株式会社 Nonwoven fabric manufacturing method and nonwoven fabric manufacturing apparatus

Also Published As

Publication number Publication date
EP2135980A3 (en) 2010-07-07
CN101608380A (en) 2009-12-23
US20090317505A1 (en) 2009-12-24
CN101608380B (en) 2012-04-11
US8186986B2 (en) 2012-05-29
ATE520805T1 (en) 2011-09-15
EP2135980A2 (en) 2009-12-23
DE102008029550A1 (en) 2009-12-24

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