EP2344688A1 - Apparatus for producing a spunbonded fabric - Google Patents

Apparatus for producing a spunbonded fabric

Info

Publication number
EP2344688A1
EP2344688A1 EP09748102A EP09748102A EP2344688A1 EP 2344688 A1 EP2344688 A1 EP 2344688A1 EP 09748102 A EP09748102 A EP 09748102A EP 09748102 A EP09748102 A EP 09748102A EP 2344688 A1 EP2344688 A1 EP 2344688A1
Authority
EP
European Patent Office
Prior art keywords
producing
spinning beam
filaments
spunbonded fabric
melt
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.)
Granted
Application number
EP09748102A
Other languages
German (de)
French (fr)
Other versions
EP2344688B1 (en
Inventor
Günter SCHÜTT
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
Oerlikon Textile 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 Oerlikon Textile GmbH and Co KG filed Critical Oerlikon Textile GmbH and Co KG
Publication of EP2344688A1 publication Critical patent/EP2344688A1/en
Application granted granted Critical
Publication of EP2344688B1 publication Critical patent/EP2344688B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D01D5/098—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
    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • 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
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random

Definitions

  • the invention relates to a device for producing a spunbonded nonwoven according to the preamble of claim 1.
  • nonwovens In the production of nonwovens according to the invention, a plurality of filaments are extruded from a polymer melt, formed into a sheet on an air-permeable screen belt and at the same time transported away from the screen belt.
  • a generic device is described in the patent DE 199 13 162 Cl.
  • molten polymer fed from an extruder is first spun into a plurality of strands in a spinning beam through one or more rows of nozzle bores and fiberized into fine filaments of finite length immediately after exiting the nozzle bores from an air stream fed through a nozzle.
  • the filaments exit the air nozzle at high speed and impinge on a screen belt provided at a certain distance, where the filaments form into a sheet. In the area between the air nozzle and the screen belt, a cooling of the filaments takes place.
  • the conveying direction of the filaments is vertical between the spinning beam, air nozzle and sieve belt.
  • the wire which is designed as a conveyor belt
  • the forming fleece is removed, the orientation and conveying direction of the wire is horizontal.
  • Below the screen belt suction is provided, which supports the formation of the web and in particular for the removal of the filaments accompanying air flow provides.
  • the vertical impact of the filaments on the wire belt at high speed usually produces a high-density web. Many process parameters are predetermined by the structure of the device and therefore allow a variation of the product within narrow limits.
  • DE 199 13 162 Cl provides a screen belt which is adjustable in height and inclination.
  • this solution leads to a high construction cost and also has the disadvantage that the downstream of the wire belt assemblies must also be adjusted.
  • the object is achieved by a device with the features of claim 1. Further developments of the invention are defined by the features and feature combinations of the subclaims.
  • the simple adaptability to different process parameters and thus to different products is achieved in that the spinning beam is pivotable together with the blowing device about a horizontal axis.
  • the axis is aligned perpendicular to the conveying direction of the wire, so that by pivoting about the axis of the point of impact of the filaments on the wire in the conveying direction is changeable.
  • the essential effect which causes a higher airiness of the nonwoven, comes from the angle at which the filaments strike the screen belt or the already partially formed web.
  • the angle has an influence on the three-dimensional constricting confusion of the filaments in the fleece.
  • the spinning beam is arranged together with the blowing device in a pivoting unit which is pivotable about a pivot axis.
  • the pivoting range between + 45 ° and - 45 ° relative to the vertical, since in this area the great effect on the airiness of the web is expected.
  • a further preferred embodiment variant is the suction, which is provided below the screen belt, in the pivoting direction and thus adjustable in the conveying direction.
  • this makes it possible to adapt the center of gravity of the vacuum profile forming below the sieve belt to the impact point of the filaments.
  • the pivot axis is identical or at least close to the center of gravity axis of the pivot unit or the spinning beam and the blowing device. As a result, low adjustment forces are required.
  • means are provided for changing the distance between the spinning beam and the wire belt.
  • this makes sense in order to compensate for the higher throwing distance of the filaments in the case of a pivoted pivoting unit; on the other hand, a further changeable process parameter is thus available.
  • the spinning beam and the blowing device are connected to the melt feed and the compressed air feed with flexible supply lines.
  • a flexible supply line is understood as meaning, for example, a flexible pipe or hose connection, but also a fixed pipe connection with rotary unions. This allows for easy adjustment during operation, so that the effect of changing the process parameters can be easily checked on the product.
  • the type and design of the flexible supply lines can be determined by a person skilled in the art.
  • the erfmdungssiee combination of spinning beam and B las device can be provided in an embodiment of the invention so that the filaments are prepared by the meltblown process in.
  • the blowing device is designed so that it serves as a take-off nozzle for filaments extruded from the spinning beam.
  • FIG. 1 the side view of the device according to the invention
  • FIG. 2 the front view of the device according to the invention
  • FIG. 3 shows, in section, an embodiment variant of spinning beam and blowing device
  • FIG. 1 shows the side view of the device according to the invention for the production of a spunbonded nonwoven.
  • a spinning beam (not shown here) and a blowing device are integrated in such a way that a filament curtain 8 is conveyed out on the underside of the pivoting unit 1.
  • the filaments 8 hit a screen belt 4, which is driven by a drive 10. Due to the high speed with which the filaments 8 impinge on the wire 4, a sheet is produced, which is transported away as a spun web 9 of wire 4 and a further processing, not shown here, is supplied.
  • a suction box 5 is provided below the point at which the filaments 8 impinge on the screen belt 4, which is displaceable in the transport direction of the wire 4.
  • the Absaugbox is applied to a support 14 which is connected to an exhaust 15.
  • the pivoting unit 1 is pivotably mounted about a pivot axis 6.
  • the pivot axis 6 is provided in or near the center axis of the pivot unit 1. Additional adaptations of the process parameters are possible in that the pivoting unit 1 is connected via a holder 12 to a carriage 7, which is movable on a rail 13 in the vertical direction.
  • FIG. 2 shows the front view of the device from FIG. 1.
  • the pivoting unit 1 extends across the width of the spunbonded web 9 to be produced.
  • the filaments 8 produced within the pivoting unit leave the pivoting unit 1 in the form of a curtain.
  • the pivoting unit 1 is pivotable in bearings 16 stored. The adjustment in the vertical direction is not shown for reasons of simplification.
  • the melt required for the production of the filaments 8 is supplied by a melt feed line 17 via a rotary feedthrough 18.1. This allows the pivoting unit to pivot during operation. It is not the continuous pivoting movement of the pivoting unit 1 during production in the foreground, but rather the adaptation to a required product when starting production.
  • the rotary feedthrough 18.1 illustrated here allows the pivoting unit to pivot about the pivot axis.
  • the melt feed line 17 has a further rotary leadthrough 18.
  • the blowing air for the blowing device is supplied via the Blas Kunststoffzu entry 21, an elastic connection 20 and the Blas Kunststofftechnisch 19.
  • an elastic connection 20 allows the degree of freedom of the pivoting unit 1.
  • the melt and the blowing air of the pivot unit 1 supply can also be supplied via rotary feedthroughs.
  • 3 shows, in section, the pivoting unit 1.
  • the pivoting unit 1 contains the spinning beam 2 and the blowing device 3.
  • the melt is distributed via the melt channel 22 and fed via a melt guide 23 to a nozzle 24.
  • the blowing air 3 which is supplied via the blown air chamber 25 under pressure, is passed from the blower 3 via the blower 26 at high speed on the exiting melt strands, so that the melt fiber to fine filaments. This process is known as the meltblown process.
  • the filaments leave the pivoting unit 1 at high speed, as shown in FIGS. 1 and 2.
  • FIG. 4 an alternative embodiment of the pivoting unit 1 is shown in FIG. 4, in which the filaments are formed directly by the spinning beam 2.
  • the melt is distributed through a melt channel 28 in the spinning beam and extruded from melt feeds 29 to filaments here.
  • the blowing device 3 is arranged at a distance below the spinning beam 2. This is done by air-permeable compounds 31.
  • the B las device 3 is constructed so that between two halves, a channel 35 is formed, in which flows through air nozzles 34 in a blast air chamber 33 under pressure provided compressed air at high speed in the conveying direction. As a result, a tensile force is exerted on the filaments, which convey them out of the pivoting unit 1.

Landscapes

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

Abstract

The invention relates to an apparatus for producing a spunbonded fabric. In order to achieve an improved airiness of the spunbonded fabric and ready adaptability to process parameters which are to be changed, the spinning beam together with the blowing apparatus is configured to be pivotable in a pivoting unit. A required high airiness is achieved by the filaments running obliquely onto the fabric belt below the spinning beam. Rotary leadthroughs or elastic feed lines to the spinning beam make the slight pivoting possible.

Description

Vorrichtung zum Herstellen eines Spinnvlieses Apparatus for producing a spunbonded nonwoven
Die Erfindung betrifft eine Vorrichtung zum Herstellen eines Spinnvlieses gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for producing a spunbonded nonwoven according to the preamble of claim 1.
Bei der Herstellung erfindungsgemäßer Vliese werden aus einer Polymerschmelze eine Mehrzahl von Filamenten extrudiert, auf einem luftdurchlässigen Siebband zu einem Flächengebilde geformt und zugleich von dem Siebband abtransportiert. Eine gattungsgemäße Vorrichtung ist in der Patentschrift DE 199 13 162 Cl beschrieben.In the production of nonwovens according to the invention, a plurality of filaments are extruded from a polymer melt, formed into a sheet on an air-permeable screen belt and at the same time transported away from the screen belt. A generic device is described in the patent DE 199 13 162 Cl.
Dabei wird von einem Extruder zugeführtes schmelzflüssiges Polymer in einem Spinnbalken durch ein- oder mehrreihig linienförmig angeordnete Düsenbohrungen zunächst zu einer Vielzahl von Strängen gesponnen und unmittelbar nach Austritt aus den Düsenbohrungen von einem durch einen Düse zugeführten Luftstrom zu feinen Filamenten endlicher Länge zerfasert.In this case, molten polymer fed from an extruder is first spun into a plurality of strands in a spinning beam through one or more rows of nozzle bores and fiberized into fine filaments of finite length immediately after exiting the nozzle bores from an air stream fed through a nozzle.
Die Filamente treten mit hoher Geschwindigkeit aus der Luftdüse aus und treffen auf ein in einer bestimmten Distanz vorgesehenes Siebband auf, wo sich die Filamente zu einem Flächengebilde formieren. In dem Bereich zwischen Luftdüse und Siebband findet eine Abkühlung der Filamente statt. Die Förderrichtung der Filamente ist zwischen Spinnbalken, Luftdüse und Siebband ist vertikal. Durch eine kontinuierliche Bewegung des Siebbandes, welches als Förderband ausgeführt ist, wird das sich bildenden Vlies abtransportiert, wobei die Ausrichtung und Förderrichtung des Siebbandes horizontal ist. Unterhalb des Siebbandes ist eine Absaugung vorgesehen, die die Formierung des Vlieses unterstützt und insbesondere für den Abtransport der die Filamente begleitenden Luftströmung sorgt. Durch das senkrechte Auftreffen der Filamente mit hoher Geschwindigkeit auf das Siebband wird zumeist ein Vlies hoher Dichte erzeugt. Viele Verfahrensparameter sind durch den Aufbau der Vorrichtung vorgegeben und lassen daher eine Variation des Produktes in nur engen Grenzen zu.The filaments exit the air nozzle at high speed and impinge on a screen belt provided at a certain distance, where the filaments form into a sheet. In the area between the air nozzle and the screen belt, a cooling of the filaments takes place. The conveying direction of the filaments is vertical between the spinning beam, air nozzle and sieve belt. By a continuous movement of the wire, which is designed as a conveyor belt, the forming fleece is removed, the orientation and conveying direction of the wire is horizontal. Below the screen belt suction is provided, which supports the formation of the web and in particular for the removal of the filaments accompanying air flow provides. The vertical impact of the filaments on the wire belt at high speed usually produces a high-density web. Many process parameters are predetermined by the structure of the device and therefore allow a variation of the product within narrow limits.
Vielfach werden jedoch auch Vliese mit hoher Luftigkeit gefordert. Um dieser Forderung zu genügen und zugleich eine hohe Flexibilität bezüglich der Vlieseigenschaften zu erreichen, sieht die DE 199 13 162 Cl ein in der Höhe und in der Neigung verstellbares Siebband vor. Diese Lösung führt jedoch zu einem hohen baulichen Aufwand und hat zudem den Nachteil, dass die dem Siebband nachgelagerten Baugruppen ebenfalls angepasst werden müssen.In many cases, however, nonwovens with high airiness are required. To meet this requirement and at the same time to achieve a high degree of flexibility with regard to the nonwoven properties, DE 199 13 162 Cl provides a screen belt which is adjustable in height and inclination. However, this solution leads to a high construction cost and also has the disadvantage that the downstream of the wire belt assemblies must also be adjusted.
Weiteren Lösungen zur Erhöhung der Flexibilität sind bekannt aus der DE 42 383 47 C2, wo zur Anpassung der Vorrichtung an die Prozessparameter verstellbare Blasluftlippen vorgeschlagen werden. Weiterhin ist es aus verschiedenen Veröffentlichungen bekannt, zwischen Filamentaustritt und Siebband passive Luftleitmittel oder aktive Blasvorrichtung und vorzusehen, die die Ablage der Filamente auf dem Siebband beeinflussten. Die letztgenannten Lösungen sind geeignet, mit wenig Aufwand die Ablage der Filamente in engen Grenzen zu be- einflussen. Sie sind jedoch nur eingeschränkt geeignet, Vliese mit hoher Luftigkeit herzustellen.Further solutions for increasing the flexibility are known from DE 42 383 47 C2, where adjustable blown air lips are proposed for adapting the device to the process parameters. Furthermore, it is known from various publications, between the filament outlet and the screen belt passive air conduction or active blowing device and provide, which influenced the filing of the filaments on the screen belt. The latter solutions are suitable, with little effort, to influence the deposition of the filaments within narrow limits. However, they are only limited suitable to produce nonwovens with high airiness.
Es ist daher Aufgabe der Erfindung, eine Vorrichtung bereitzustellen, mit der die Prozessparameter beim Erstellen von Spinnvlies in einem weiten Bereich variiert werden können und mit dem darüber hinaus Spinnvlies mit besonders hoher Luftigkeit hergestellt werden kann.It is therefore an object of the invention to provide a device with which the process parameters when creating spunbonded fabric can be varied within a wide range and with which moreover spunbonded fabric with particularly high airiness can be produced.
Die Aufgabe wird erfindungsgemäß durch eine Vorrichtung mit den Merkmalen nach Anspruch 1 gelöst. Weiterbildungen der Erfindung sind durch die Merkmale und Merkmalskombinationen der Unteransprüche definiert. Die einfache Anpassbarkeit an verschiedene Verfahrensparameter und damit an verschiedene Produkte wird dadurch erreicht, dass der Spinnbalken zusammen mit der Blasvorrichtung um eine horizontale Achse schwenkbar ist. Die Achse ist senkrecht zur Förderrichtung des Siebbandes ausgerichtet, so dass durch das Schwenken um die Achse der Auftreffpunkt der Filamente auf das Siebband in Förderrichtung veränderbar ist. Wie sich gezeigt hat, rührt der wesentliche Effekt, der eine höhere Luftigkeit des Vlieses bewirkt, aus dem Winkel, unter dem die Filamente auf das Siebband beziehungsweise auf das sich bereits teilweise gebildete Vlies auftreffen. Insbesondere ist es möglich, durch das schräge Auftreffen den sich bildenden Staudruck zu reduzieren, der auf die Filamente wirkt. Durch das Einstellen des Winkels lässt sich so die Luftigkeit feinfühlig anpassen. Weiterhin hat der Winkel einen Einfluss auf die sich dreidimensional ausbildende Wirr läge der Filamente im Vlies.The object is achieved by a device with the features of claim 1. Further developments of the invention are defined by the features and feature combinations of the subclaims. The simple adaptability to different process parameters and thus to different products is achieved in that the spinning beam is pivotable together with the blowing device about a horizontal axis. The axis is aligned perpendicular to the conveying direction of the wire, so that by pivoting about the axis of the point of impact of the filaments on the wire in the conveying direction is changeable. As has been shown, the essential effect, which causes a higher airiness of the nonwoven, comes from the angle at which the filaments strike the screen belt or the already partially formed web. In particular, it is possible to reduce by the oblique impact the forming dynamic pressure, which acts on the filaments. By adjusting the angle, the airiness can be sensitively adjusted. Furthermore, the angle has an influence on the three-dimensional constricting confusion of the filaments in the fleece.
In einer bevorzugten Ausführungsform ist der Spinnbalken zusammen mit der Blasvorrichtung in einer Schwenkeinheit angeordnet, die um eine Schwenkachse schwenkbar ist.In a preferred embodiment, the spinning beam is arranged together with the blowing device in a pivoting unit which is pivotable about a pivot axis.
Bevorzugt ist der Schwenkbereich zwischen + 45 ° und - 45 ° gegenüber der Ver- tikalen, da in diesem Bereich der große Effekt auf die Luftigkeit des Vlieses zu rechnen ist.Preferably, the pivoting range between + 45 ° and - 45 ° relative to the vertical, since in this area the great effect on the airiness of the web is expected.
Ein einer weiteren bevorzugten Ausführungsvariante ist die Absaugung, die unterhalb des Siebbandes vorgesehen ist, in Schwenkrichtung und damit in Förder- richtung verstellbar. Einerseits kann damit der Schwerpunkt des sich unterhalb des Siebbandes bildenden Unterdruckprofils an den Auftreffpunkt der Filamente angepasst werden. Andererseits kann durch bewusstes Verschieben dieses Unterdruckprofils ein weiterer Einfluss auf die Verfahrensparameter genommen werden. In einer vorteilhaften Weise ist die Schwenkachse identisch oder zumindest nahe der Schwerpunktachse der Schwenkeinheit beziehungsweise des Spinnbalkens und der Blasvorrichtung. Dadurch sind geringe Verstellkräfte erforderlich.A further preferred embodiment variant is the suction, which is provided below the screen belt, in the pivoting direction and thus adjustable in the conveying direction. On the one hand, this makes it possible to adapt the center of gravity of the vacuum profile forming below the sieve belt to the impact point of the filaments. On the other hand, by consciously shifting this vacuum profile, a further influence on the process parameters can be taken. In an advantageous manner, the pivot axis is identical or at least close to the center of gravity axis of the pivot unit or the spinning beam and the blowing device. As a result, low adjustment forces are required.
In einer weiteren, besonders bevorzugten Ausführungsvariante sind Mittel zum Verändern des Abstandes zwischen Spinnbalken und Siebband vorgesehen. Dies ist einerseits sinnvoll, um bei einer geschwenkten Schwenkeinheit die höhere Wurfweite der Filamente zu kompensieren, andererseits steht damit ein weiterer änderbarer Verfahrensparameter zur Verfügung.In a further, particularly preferred embodiment, means are provided for changing the distance between the spinning beam and the wire belt. On the one hand, this makes sense in order to compensate for the higher throwing distance of the filaments in the case of a pivoted pivoting unit; on the other hand, a further changeable process parameter is thus available.
In einer ebenfalls vorteilhaften Ausführungsvariante sind der Spinnbalken und die Blasvorrichtung mit flexiblen Versorgungsleitungen mit der Schmelzezuführung und der Druckluftzuführung verbunden. Hierbei wird unter flexibler Versorgungsleitung beispielsweise eine biegeelastische Rohr- beziehungsweise Schlauchver- bindung, aber auch eine feste Rohrverbindung mit Drehdurchführungen verstanden. Dies ermöglicht eine leichte Verstellung im laufenden Betrieb, so dass die Auswirkung einer Veränderung der Verfahrensparameter leicht am Produkt überprüft werden kann. Die Art und Ausführung der flexiblen Versorgungsleitungen kann von einem Fachmann bestimmt werden.In a likewise advantageous embodiment variant, the spinning beam and the blowing device are connected to the melt feed and the compressed air feed with flexible supply lines. In this case, a flexible supply line is understood as meaning, for example, a flexible pipe or hose connection, but also a fixed pipe connection with rotary unions. This allows for easy adjustment during operation, so that the effect of changing the process parameters can be easily checked on the product. The type and design of the flexible supply lines can be determined by a person skilled in the art.
Die erfmdungsgemäße Kombination von Spinnbalken und B las Vorrichtung kann in einer Ausführungsvariante der Erfindung so vorgesehen werden, dass die Filamente nach dem Meltblown- Verfahren in hergestellt werden.The erfmdungsgemäße combination of spinning beam and B las device can be provided in an embodiment of the invention so that the filaments are prepared by the meltblown process in.
In einer anderen Ausführungsvariante ist die Blasvorrichtung so ausgebildet, dass sie als Abzugsdüse für vom Spinnbalken extrudierte Filamente dient.In another embodiment, the blowing device is designed so that it serves as a take-off nozzle for filaments extruded from the spinning beam.
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.
- A - Es stellen dar:- A - They show:
Figur 1 : Die Seitenansicht der erfindungsgemäßen Vorrichtung,FIG. 1: the side view of the device according to the invention,
Figur 2: die Vorderansicht der erfindungsgemäßen Vorrichtung,FIG. 2: the front view of the device according to the invention,
Figur 3: im Schnitt eine Ausfuhrungsvariante von Spinnbalken und Blasvorrichtung,FIG. 3 shows, in section, an embodiment variant of spinning beam and blowing device,
Figur 4: im Schnitt eine weitere Ausfuhrungsvariante von Spinnbalken undFigure 4: in section a further embodiment variant of spinning beam and
B lasvorrichtung .B lasvorrichtung.
In Figur 1 ist die Seitenansicht der erfindungsgemäßen Vorrichtung zur Herstel- lung eines Spinnvlieses dargestellt.FIG. 1 shows the side view of the device according to the invention for the production of a spunbonded nonwoven.
In einer Schwenkeinheit 1 ist ein hier nicht dargestellter Spinnbalken und eine Blasvorrichtung in der Weise integriert, dass an der Unterseite der Schwenkeinheit 1 ein Filamentvorhang 8 heraus gefördert wird. Die Filamente 8 treffen auf ein Siebband 4, das von einem Antrieb 10 angetrieben wird. Durch die hohe Geschwindigkeit, mit der die Filamente 8 auf das Siebband 4 auftreffen, wird ein Flächengebilde erzeugt, das als Spinnvlies 9 von Siebband 4 abtransportiert und einer weiteren hier nicht dargestellten Bearbeitung zugeführt wird. Unterhalb des Punktes, an dem die Filamente 8 auf das Siebband 4 auftreffen, ist eine Absaug- box 5 vorgesehen, die in Transportrichtung des Siebbandes 4 verschiebbar ist. Dazu ist die Absaugbox auf einem Träger 14 aufgebracht, der mit einer Absaugung 15 verbunden ist. Damit kann einerseits der Unterdruckbereich, der durch die Absaugbox 5 dem Siebband 4 aufgeprägt wird, an den Auftreffpunkt der Filamente 8 auf das Siebband 4 angepasst werden. Zusätzlich kann durch das Ver- schieben vor oder hinter den Auftreffpunkt Einfluss auf die Bildung des Spinnvlieses 9 genommen werden. Um die erfϊndungsgemäße Vorrichtung leicht an unterschiedliche Prozessparameter anzupassen, ist die Schwenkeinheit 1 um eine Schwenkachse 6 schwenkbar gelagert. Bevorzugt ist die Schwenkachse 6 in oder in der Nähe der Schwerpunktachse der Schwenkeinheit 1 vorgesehen. Zusätzliche Anpassungen der Prozesspa- rameter sind dadurch möglich, dass die Schwenkeinheit 1 über einen Halter 12 mit einem Schlitten 7 verbunden ist, der in vertikaler Richtung auf einer Schiene 13 bewegbar ist.In a pivoting unit 1, a spinning beam (not shown here) and a blowing device are integrated in such a way that a filament curtain 8 is conveyed out on the underside of the pivoting unit 1. The filaments 8 hit a screen belt 4, which is driven by a drive 10. Due to the high speed with which the filaments 8 impinge on the wire 4, a sheet is produced, which is transported away as a spun web 9 of wire 4 and a further processing, not shown here, is supplied. Below the point at which the filaments 8 impinge on the screen belt 4, a suction box 5 is provided, which is displaceable in the transport direction of the wire 4. For this purpose, the Absaugbox is applied to a support 14 which is connected to an exhaust 15. Thus, on the one hand, the negative pressure region, which is impressed by the suction box 5 on the wire 4, can be adapted to the point of impact of the filaments 8 on the wire 4. In addition, it is possible to influence the formation of the spunbonded fabric 9 by displacing before or after the point of impact. In order to easily adapt the device according to the invention to different process parameters, the pivoting unit 1 is pivotably mounted about a pivot axis 6. Preferably, the pivot axis 6 is provided in or near the center axis of the pivot unit 1. Additional adaptations of the process parameters are possible in that the pivoting unit 1 is connected via a holder 12 to a carriage 7, which is movable on a rail 13 in the vertical direction.
Figur 2 zeigt die Vorderansicht der Vorrichtung aus Figur 1. Die Schwenkeinheit 1 erstreckt sich über die Breite des zu erzeugenden Spinnvlieses 9. Unterseitig verlassen die innerhalb der Schwenkeinheit erzeugten Filamente 8 in Form eines Vorhangs die Schwenkeinheit 1. Die Schwenkeinheit 1 ist in Lagerungen 16 schwenkbar gelagert. Die Verstellung in vertikaler Richtung ist aus Vereinfachungsgründen nicht mit dargestellt. Die für die Erzeugung der Filamente 8 erfor- derlichen Schmelze wird von einer Schmelzezuleitung 17 über eine Drehdurchführung 18.1 zugeführt. Dies ermöglicht das Schwenken der Schwenkeinheit im Betrieb. Dabei steht nicht die kontinuierliche Schwenkbewegung der Schwenkeinheit 1 während der Produktion im Vordergrund, sondern vielmehr die Anpassung an ein gefordertes Produkt beim Anfahren der Produktion. Die hier darge- stellte Drehdurchführung 18.1 ermöglicht das Schwenken der Schwenkeinheit um die Schwenkachse. Um die in Figur 1 dargestellte in einer Weiterbildung der Erfindung vorgesehene vertikale Einstellung zu ermöglichen, weist die Schmelzezuleitung 17 eine weitere Drehdurchführung 18.2 auf. Die Blasluft für die Blasvorrichtung wird über die Blasluftzuführung 21, eine elastische Verbindung 20 und die Blasluftleitung 19 zugeführt. Alternativ zu den Drehdurchführungen 18.1 und 18.2 erlaubt hier eine elastische Verbindung 20 den Freiheitsgrad der Schwenkeinheit 1. Abweichend und alternativ zu den dargestellten Ausführungen sind auch andere Möglichkeiten bekannt und von der Erfindung mit eingeschlossen, die Schmelze und die Blasluft der Schwenkeinheit 1 zuzuführen. Beispielsweise kann die Blasluft auf der der Schmelzezuführung gegenüberliegenden Seite ebenfalls über Drehdurchführungen zugeführt werden. Figur 3 stellt im Schnitt die Schwenkeinheit 1 dar. Die Schwenkeinheit 1 enthält den Spinnbalken 2 sowie die Blasvorrichtung 3. Innerhalb des Spinnbalkens 2 wird die Schmelze über den Schmelzekanal 22 verteilt und über eine Schmelzeführung 23 einer Düse 24 zugeführt. Unterhalb und seitlich der Düse 24 wird von der Blasvorrichtung 3 über die Blasluftdüse 26 die Blasluft, welche über die Blasluftkammer 25 unter Druck bereitgestellt wird, mit hoher Geschwindigkeit auf die austretenden Schmelzestränge geleitet, so dass die Schmelze zu feinen Filamenten zerfasert. Dieses Verfahren ist als Meltblown- Verfahren bekannt. Durch den Austritt 27 verlassen die Filamente mit hoher Geschwindigkeit die Schwenkeinheit 1, wie in den Figuren 1 und 2 dargestellt.FIG. 2 shows the front view of the device from FIG. 1. The pivoting unit 1 extends across the width of the spunbonded web 9 to be produced. On the underside, the filaments 8 produced within the pivoting unit leave the pivoting unit 1 in the form of a curtain. The pivoting unit 1 is pivotable in bearings 16 stored. The adjustment in the vertical direction is not shown for reasons of simplification. The melt required for the production of the filaments 8 is supplied by a melt feed line 17 via a rotary feedthrough 18.1. This allows the pivoting unit to pivot during operation. It is not the continuous pivoting movement of the pivoting unit 1 during production in the foreground, but rather the adaptation to a required product when starting production. The rotary feedthrough 18.1 illustrated here allows the pivoting unit to pivot about the pivot axis. In order to enable the vertical adjustment provided in a development of the invention shown in FIG. 1, the melt feed line 17 has a further rotary leadthrough 18. The blowing air for the blowing device is supplied via the Blasluftzuführung 21, an elastic connection 20 and the Blasluftleitung 19. As an alternative to the rotary feedthroughs 18.1 and 18.2, an elastic connection 20 allows the degree of freedom of the pivoting unit 1. Deviating from and alternative to the illustrated embodiments, other possibilities are known and included by the invention, the melt and the blowing air of the pivot unit 1 supply. For example, the blown air on the opposite side of the melt supply can also be supplied via rotary feedthroughs. 3 shows, in section, the pivoting unit 1. The pivoting unit 1 contains the spinning beam 2 and the blowing device 3. Within the spinning beam 2, the melt is distributed via the melt channel 22 and fed via a melt guide 23 to a nozzle 24. Below and to the side of the nozzle 24, the blowing air 3, which is supplied via the blown air chamber 25 under pressure, is passed from the blower 3 via the blower 26 at high speed on the exiting melt strands, so that the melt fiber to fine filaments. This process is known as the meltblown process. Through the exit 27, the filaments leave the pivoting unit 1 at high speed, as shown in FIGS. 1 and 2.
Alternativ zu der Variante in Figur 3 wird in Figur 4 eine alternative Ausführungsform der Schwenkeinheit 1 dargestellt, bei der die Filamente direkt vom Spinnbalken 2 gebildet werden. Dazu wird auch hier die Schmelze durch einen Schmelzekanal 28 im Spinnbalken verteilt und von Schmelzezuführungen 29 zu Filamenten extrudiert. In einem Abstand unterhalb des Spinnbalkens 2 ist die Blasvorrichtung 3 angeordnet. Dies erfolgt durch luftdurchlässige Verbindungen 31. Die B las Vorrichtung 3 ist so aufgebaut, dass zwischen zwei Hälften ein Kanal 35 gebildet wird, in den über Luftdüsen 34 die in einer Blasluftkammer 33 unter Druck bereitgestellte Druckluft unter hoher Geschwindigkeit in Förderrichtung einströmt. Dadurch wird auf die Filamente eine Zugkraft ausgeübt, die diese aus der Schwenkeinheit 1 heraus fördern. As an alternative to the variant in FIG. 3, an alternative embodiment of the pivoting unit 1 is shown in FIG. 4, in which the filaments are formed directly by the spinning beam 2. For this purpose, the melt is distributed through a melt channel 28 in the spinning beam and extruded from melt feeds 29 to filaments here. At a distance below the spinning beam 2, the blowing device 3 is arranged. This is done by air-permeable compounds 31. The B las device 3 is constructed so that between two halves, a channel 35 is formed, in which flows through air nozzles 34 in a blast air chamber 33 under pressure provided compressed air at high speed in the conveying direction. As a result, a tensile force is exerted on the filaments, which convey them out of the pivoting unit 1.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Schwenkeinheit1 swivel unit
2 Spinnbalken2 spinning beams
3 B lasvorrichtung3 B lasvorrichtung
4 Siebband4 screen belt
5 Absaugbox5 suction box
6 Schwenkachse6 pivot axis
7 Schlitten7 sleds
8 Filamentvorhang8 filament curtain
9 Spinnvlies9 spunbonded fabric
10 Antrieb10 drive
11 Schwenkbereich11 swivel range
12 Halter12 holders
13 Schiene13 rail
14 Träger14 carriers
15 Absaugung15 suction
16 Lagerung16 storage
17 Schmelzezuleitung17 melt feed line
18.1, 18.2 Drehdurchführung18.1, 18.2 Rotary feedthrough
19 Blasluftleitung19 blown air line
20 Elastische Verbindung20 Elastic connection
21 B lasluftzuführung21 B air supply
22 Schmelzekanal22 melt channel
23 S chmelzezuführung23 melt feed
24 Düse24 nozzle
25 B lasluftkammer25 B exhaust air chamber
26 Blasluftdüse26 Blown air nozzle
27 Austritt Schmelzekanal27 exit melt channel
S chmelzezuführungMelt feed
Düsenjet
Verbindungconnection
Abzugsdüsenavel
B lasluftkammerB air vent
Luftdüseair nozzle
Kanal channel

Claims

Patentansprüche claims
1. Vorrichtung zur Herstellung eines Spinnvlieses, mit einem Spinnbalken (2) zum Extrudieren von Schmelzesträngen, mit einer hinter dem Austritt angeordneten Blasvorrichtung (3), sowie mit einer vertikal unterhalb des Spinnbalkens angeordneten Siebbandvorrichtung mit einem in einer Förderrichtung bewegbaren Siebband (4), dadurch gekennzeichnet, dass der Spinnbalken (2) und die Blasvorrichtung (3) um eine horizontale und im Wesentlichen senkrecht zur Förderrichtung ausgerichtete Schwenkachse (6) verstellbar ist.1. A device for producing a spunbonded web, comprising a spinning bar (2) for extruding melt strands, having a blowing device (3) arranged behind the outlet, and a screen belt device arranged vertically below the spinning bar with a screen belt (4) which can be moved in a conveying direction, characterized in that the spinning beam (2) and the blowing device (3) about a horizontal and substantially aligned perpendicular to the conveying direction pivot axis (6) is adjustable.
2. Vorrichtung zur Herstellung eines Spinnvlieses nach Anspruch 1, dadurch gekennzeichnet, dass der Spinnbalken (2) und die Blasvorrichtung (3) in einer um eine Schwenkachse (6) schwenkbare Schwenkeinheit (1) angeordnet sind.2. An apparatus for producing a spunbonded fabric according to claim 1, characterized in that the spinning beam (2) and the blowing device (3) in a pivotable about a pivot axis (6) pivoting unit (1) are arranged.
3. Vorrichtung zur Herstellung eines Spinnvlieses nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Schwenkbereich (11) zwischen +45 ° und -45 ° gegenüber der Vertikalen ist.3. A device for producing a spunbonded fabric according to claim 1 or 2, characterized in that the pivoting range (11) is between +45 ° and -45 ° relative to the vertical.
4. Vorrichtung zur Herstellung eines Spinnvlieses nach einem der Ansprüche4. An apparatus for producing a spunbonded fabric according to any one of claims
1 bis 3, dadurch gekennzeichnet, dass unterhalb des Siebbandes (4) eine Absaugung (5) vorgesehen ist und dass die Absaugung in Schwenkrichtung verschiebbar ist. 1 to 3, characterized in that below the screen belt (4) an extraction (5) is provided and that the suction in the pivoting direction is displaceable.
5. Vorrichtung zur Herstellung eines Spinnvlieses nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schwenkachse (6) im Wesentlichen der Schwerpunktachse der zu schwenkenden Schwenkeinheit (1) entspricht.5. An apparatus for producing a spunbonded nonwoven according to one of the preceding claims, characterized in that the pivot axis (6) substantially corresponds to the axis of gravity of the pivoting unit (1) to be pivoted.
6. Vorrichtung zur Herstellung eines Spinnvlieses nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Mittel (7) zum Verändern des Abstandes zwischen Spinnbalken (2) und6. An apparatus for producing a spunbonded fabric according to one of the preceding claims, characterized in that means (7) for changing the distance between the spinning beam (2) and
Siebband (4) vorgesehen sind.Sieve strip (4) are provided.
7. Vorrichtung zur Herstellung eines Spinnvlieses nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Spinnbalken (2) und die Blasvorrichtung (3) mit flexiblen Versorgungsleitungen mit der Schmelzezuleitung (17) und der Blasluftzuführung (21) verbunden ist.7. An apparatus for producing a spunbonded fabric according to one of the preceding claims, characterized in that the spinning beam (2) and the blowing device (3) with flexible supply lines to the melt supply line (17) and the Blasluftzuführung (21) is connected.
8. Vorrichtung zur Herstellung eines Spinnvlieses nach einem der Ansprüche8. An apparatus for producing a spunbonded fabric according to any one of claims
1 bis 7, dadurch gekennzeichnet, dass die Blasvorrichtung (3) unmittelbar hinter dem Austritt der Schmelze aus dem Spinnbalken (2) in der Form vorgesehen ist, dass die Blasluft mit ho- her Geschwindigkeit auf die Schmelzestränge geleitet wird und die1 to 7, characterized in that the blowing device (3) is provided directly behind the outlet of the melt from the spinning beam (2) in the form that the blowing air is passed at high speed on the melt strands and the
Schmelze zerfasert.Melted fiber.
9. Vorrichtung zur Herstellung eines Spinnvlieses nach einem der Ansprüche9. An apparatus for producing a spunbonded fabric according to any one of claims
1 bis 7, dadurch gekennzeichnet, dass die B las Vorrichtung (3) mit einem so großen Abstand hinter dem Austritt der Schmelze aus dem Spinnbalken (2) vorgesehen ist und dass die Blasluft in der Form auf die Filamente geleitet wird, dass die Filamente bereits teilweise abgekühlt sind und die Blasluft eine Zugkraft auf die Filamente bewirkt. 1 to 7, characterized in that the B las device (3) with such a large distance behind the outlet of the melt from the spinning beam (2) is provided and that the blowing air is passed in the form of the filaments, that the filaments are already partially cooled and the blowing air is a tensile force on the filaments causes.
EP09748102A 2008-11-13 2009-11-02 Apparatus for producing a spunbonded fabric Active EP2344688B1 (en)

Applications Claiming Priority (2)

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DE102008057172 2008-11-13
PCT/EP2009/064414 WO2010054943A1 (en) 2008-11-13 2009-11-02 Apparatus for producing a spunbonded fabric

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EP2344688A1 true EP2344688A1 (en) 2011-07-20
EP2344688B1 EP2344688B1 (en) 2013-01-09

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EP (1) EP2344688B1 (en)
JP (1) JP5586620B2 (en)
KR (1) KR20110086562A (en)
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EP2344688B1 (en) 2013-01-09
JP5586620B2 (en) 2014-09-10
US8496459B2 (en) 2013-07-30
JP2012508832A (en) 2012-04-12
WO2010054943A1 (en) 2010-05-20
CN102216501B (en) 2014-05-21
US20110244066A1 (en) 2011-10-06
CN102216501A (en) 2011-10-12

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