EP1797230B1 - Device for stacking synthetic fibres to form a nonwoven - Google Patents

Device for stacking synthetic fibres to form a nonwoven Download PDF

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Publication number
EP1797230B1
EP1797230B1 EP05797780A EP05797780A EP1797230B1 EP 1797230 B1 EP1797230 B1 EP 1797230B1 EP 05797780 A EP05797780 A EP 05797780A EP 05797780 A EP05797780 A EP 05797780A EP 1797230 B1 EP1797230 B1 EP 1797230B1
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EP
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Prior art keywords
belt
depositing
storage
fibers
depositing belt
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EP05797780A
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German (de)
French (fr)
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EP1797230A1 (en
Inventor
Gianni Boscolo
Hans-Holger Heesch
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Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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    • 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
    • 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 depositing synthetic fibers into a nonwoven according to the preamble of claim 1.
  • the guide shaft at the end facing the storage tape ends each have a pivotally held damper flap, which can be held relative to the storage belt with different angles of attack.
  • the known device has the disadvantage that gaps are formed between the ends of the guide shaft and the storage belt. Such gaps cause the suction device in addition to the supplied air flow with a significant proportion of the ambient air with sucks. Thus, in addition to a higher air consumption, in particular a direct influence of the fiber deposit to form the fleece. There is a risk of getting so-called drifts in the fleece.
  • Another object of the invention is to provide a device for depositing synthetic fibers to a nonwoven, with which nonwovens can be produced with reproducible nonwoven qualities.
  • the storage flap of the guide shaft is formed by a support and an elastic sealing lip, which sealing lip is in sliding contact with the storage belt.
  • the invention is characterized in that on the longitudinal side of the guide shaft between the storage belt and the end of the guide shaft sealing takes place, which shields the storage area to the environment.
  • the elasticity of the sealing lip causes a bias that prevents lifting or separating the sealing lip with sliding contact.
  • unevennesses on the depositing belt can advantageously be compensated by the sealing lip.
  • a suction of external air can be avoided.
  • the guide shaft on the opposite longitudinal side on a second movably held damper which is formed by a second carrier and a second elastic sealing lip, which sealing lip during operation held in sliding contact with the fleece deposited on the storage belt.
  • This can be advantageously on the longitudinal side of the guide shaft, on which the fleece is guided from the storage area to achieve a high sealing effect against outside air intake.
  • the deposition of the fibers is thus carried out substantially without the action of sucked ambient air.
  • the adjustability of the stowage flap is completely preserved relative to the storage belt.
  • the carrier will lead with the held elastic sealing lip in different positions relative to the storage belt. Due to the adjustability of the carrier and sealing lips, it is possible to influence the storage angle and the entire storage image of the fibers. So wide or narrow storage areas can be set on the storage belt.
  • sealing lips are interchangeably connected according to an advantageous embodiment of the invention with the carriers, so that with worn sealing lips corresponding maintenance can be performed quickly.
  • the sealing lips are preferably formed from a thin sheet steel, which rests with its free end on the storage belt or the fleece.
  • sealing lips at least in the contact area with a wear protection.
  • these could be formed by a special coating in the contact area.
  • the carrier are pivotally mounted and each of the carrier is associated with an actuator, by which an enclosed between the storage belt and the sealing lip angle of attack is changeable and adjustable. This allows arbitrary and reproducible angle set on the guide shaft.
  • the flexibility of adjustability for depositing the fibers can be advantageously further increased by the guide shaft is held by means of a holder below the exhaust nozzle, wherein the opposite in the longitudinal sides holding elements allow a shift and adjustment of the associated shaft elements.
  • the influence of the tray can already be done directly on leaving the fibers from the drawing-off nozzle.
  • an adjustable suction opening is formed, through which the suction device is connected to the underside of the storage belt.
  • the suction opening can advantageously be formed between two cover plates which are held so as to be displaceable relative to one another, so that the fiber deposit can e.g. can be made very compact at a narrow suction opening or fanned with a corresponding wide suction opening.
  • the suction gap formed between the cover plates and the storage belt is preferably designed to be adjustable, so that the amount of the sucked-in external air can be adapted individually to the process parameters.
  • the adjustability can be realized by a height adjustment of the cover plates.
  • a plurality of spacers are arranged between the cover plates and the storage belt, which have a semi-circular cross-section to the top of the depositing tape facing a rounding, so that a support and guidance of the storage belt is guaranteed.
  • the suction gap is formed, through which only a defined amount of external air can enter the suction area.
  • the suction gap is preferably set in the range of 1 to 1.5 mm.
  • the ability to change a storage height between the discharge nozzle and the storage belt and set.
  • the height differences can be realized by replacing the sealing lips or by changing the angle of attack of the jam flaps.
  • the device according to the invention is thus characterized by a maximum of flexibility for nonwoven storage.
  • the desired setting parameters for producing a specific fleece can be set. It is possible to perform the settings by controllable actuators, which are automatically controlled, for example by means of a control device according to the specification of process parameters.
  • Fig. 1 a first embodiment of the device according to the invention for depositing synthetic fibers to a nonwoven fabric is shown schematically.
  • Fig. 1 shows a rectangular discharge nozzle 1 with a central fiber channel 12.
  • a plurality of fibers 13 are guided in rows.
  • the fibers 13 are previously spun by means of a spinning device, not shown here, from a synthetic polymer melt.
  • a compressed air is supplied in the fiber channel 12 so that the fibers 13 are continuously withdrawn from the spinning device and conveyed on an outlet side of the draw-off nozzle 1.
  • a guide shaft 2 and a storage belt 3 arranged at the end of the guide shaft 2 are provided on the outlet side of the haul-off nozzle 1.
  • the guide shaft 2 has two opposite shaft walls 10.1 and 10.2, which are arranged substantially parallel to the fiber channel 12 of the discharge nozzle 1.
  • the shaft walls 10.1 and 10.2 are in this case preferably held sealingly on the outlet side of the draw-off nozzle 1.
  • the storage flaps 5.1 and 5.2 are each formed by a support 6.1 and 6.2 and a 6.1 and 6.2 interchangeably connected to the support sealing lip 7.1 and 7.2.
  • the carriers 6.1 and 6.2 are each variable via pivot axes 8.1 and 8.2 in an angle.
  • the angle of attack between the storage belt 3 and the damper 5.1 to 5.2 included angle.
  • the sealing lips 7.1 and 7.2 are elastically configured so that a lower end of the sealing lips 7.1 and 7.2 in sliding contact with the storage belt 3 and the storage belt 3 guided fleece 14 is.
  • the area of the storage belt 3 within the guide shaft 2 between the sealing lips 7.1 and 7.2 is referred to here as a storage area.
  • the storage belt 3 is connected to a drive device, not shown here, through which the storage belt 3 can be guided in a direction indicated by arrow conveying direction.
  • the storage belt 3 is formed permeable to air, so that the air flow of the discharge nozzle 1 penetrates the deposit belt 3.
  • a suction device 4 is arranged on the underside of the storage belt 3.
  • the suction effect of the suction device 4 is limited to the storage area within the guide shaft 2.
  • FIG. 1 illustrated embodiment is shown in an operating situation in which the fibers 13 are continuously guided through the discharge nozzle 1 in the fiber channel 12 and conveyed to the storage belt 3.
  • the fibers 13 pass through the guide shaft 2.
  • stowage valves 5.1 and 5.2 on the one hand the storage area of the storage belt 3 sealed to the environment of the longitudinal sides and on the other hand determines the location of the storage area on the storage belt 3.
  • the sealing lips 7.1 and 7.2 held on the supports 6.1 and 6.2 lie elastically against the surface of the deposition belt 3 or of the nonwoven 14 conveyed by the deposition belt 3.
  • the end faces of the guide shaft 2 are not closed. However, in principle it is also possible to close the end faces of the guide shaft 2 sealingly against the environment.
  • the stoppers are 5.1 and 5.2 respectively associated with adjusting means 11, by which the angle of attack at the end of the guide shaft 2 are adjustable and changeable.
  • adjusting means 11 by which the angle of attack at the end of the guide shaft 2 are adjustable and changeable.
  • the sealing lips 7.1 and 7.2 held on the carriers 6.1 and 6.2 are used exclusively for sealing engagement with the depositing belt 3 or the fleece 14.
  • a further embodiment of the device according to the invention for depositing synthetic fibers to a nonwoven fabric is shown schematically in a cross-sectional view.
  • the embodiment according to Fig. 2 is substantially identical to the previous embodiment, so that in the following description, only the differences will be explained.
  • a lower storage height is set between the draw-off nozzle 1 and the storage belt 3 in relation to the preceding embodiment.
  • the deduction nozzle 1 is designed to be adjustable in height.
  • the arranged between the discharge nozzle 1 and the storage belt 3 guide shaft 2 is formed in this embodiment by two oppositely arranged storage flaps 5.1 and 5.2.
  • the storage flap 5.1 has a carrier 6.1, which is pivotally mounted on the pivot axis 8.1.
  • the pivot axis 8.1 is arranged on a holding element 15.1 of the holder 9.
  • the bracket 9 is mounted on the outlet side of the exhaust nozzle 1.
  • a sealing lip 7.1 is interchangeably fixed, for example in the form of a steel sheet.
  • the length of the sealing lip 7.1 is dimensioned such that the lower end of the sealing lip 7.1 in sliding contact with the storage belt 3 is.
  • On the support 6.1 engages an actuating means 11.1, through which the carrier 6.1 is pivotable about the pivot axis 8.1.
  • the storage flap 5.2 is arranged by the carrier 6.2 and the sealing lip 7.2.
  • the carrier 6.2 is guided on the pivot axis 8.2, wherein the pivot axis 8.2 is arranged on the holding element 15.2.
  • a sealing lip 7.2 is interchangeably attached, which stands with its free end in sliding contact with a guided on the storage belt 3 fleece 14.
  • the sealing lip 7.2 could also be formed as a steel sheet, for example, with a thickness of 0.2 mm.
  • On the support 6.2 engages an actuating means 11.2, through which the carrier is pivotable about the pivot axis 8.2 and positionable.
  • the holder 9 is formed by the opposing holding elements 15.1 and 15.2.
  • the holding elements 15.1 and 15.2 are designed to be horizontally displaceable, so that the guide shaft 2 is adjustable in its width transversely to the conveying direction of the fibers.
  • the length compensation in the guide shaft 2 can be compensated either by replacing the sealing lips 7.1 and 7.2 by correspondingly shorter or longer sealing lips or by changing the angle of attack of the carrier 6.1 and 6.2.
  • the suction device 4 has an adjustable suction opening 16, which is assigned directly to the storage area on the storage belt 3.
  • the suction opening 16 is in this case formed between two slidably arranged cover plates 17.1 and 17.2.
  • Each of the cover plates 17.1 and 17.2 can be horizontal relative to each other move.
  • a minimum suction gap 18 is formed between the cover plates 17.1. and 17.2 and the storage belt 3.
  • the suction gap 18 is dimensioned such that a foreign air outside of the storage area on the storage belt 3 can be sucked. In particular in the area of the nonwoven guide, it is thus possible to avoid lifting off the nonwoven 14 from the depositing belt 3. An additional suction in the conveying direction of the web 14 can thus be omitted.
  • the suction gap 18 is formed adjustable, for example by a height adjustment of the cover plates 17.1 and 17.2.
  • Fig. 2 illustrated embodiment The function of in Fig. 2 illustrated embodiment is identical to the previous embodiment, so that reference can be made to the preceding description. Due to the flexible design of the guide shaft 2, however, a variety of setting options are executable to obtain a special fiber deposit and thus a specific fleece. In this case, the adjusting movements of the holding elements 15.1 and 15.2, the withdrawal nozzle 1, the cover plates 17.1 and 17.2 could be performed automatically by actuators, which are controllable for example via a central control device. Thus, it is possible to perform an automatic adjustment of the various actuators depending on predetermined product and process parameters.
  • Fig. 3 to 5 are some variants of operational settings of the Fig. 2 shown device shown.
  • a relatively wide storage area can be realized by the fact that as in Fig. 3 shown the storage flaps 5.1 and 5.2 are each pivoted outwardly. A correspondingly large suction opening 16 on the underside of the storage belt 3 thus leads to a spreading of the fiber during storage, so that a relatively loose fleece is formed.
  • Fig. 4 is an operational setting of the device Fig. 2 illustrated, in which the storage flaps 5.1 and 5.2 define a relatively narrow storage area on the storage belt 3, so that with a correspondingly small suction opening 16, a relatively narrow storage area on the storage belt 3 is generated.
  • the fibers 13 are deposited almost perpendicularly on the depositing belt 3, so that in particular compact and strong nonwovens can be produced.
  • Fig. 5 is another way of ceasing operations in Fig. 2 shown device shown schematically.
  • a relatively wide storage area is produced on the storage belt, which is arranged laterally offset from the outlet side of the discharge nozzle.
  • the fibers are deposited on the depositing belt 3 at a relatively shallow angle.
  • the in the Fig. 3 to 5 shown operating settings show only a small bandwidth of the possible adjustment variants of the device according to the invention. All operating settings of the device according to the invention have in common that the influence of outside air during the deposition of the fibers is reduced to a minimum. Due to the sliding contact between the sealing lips 7.1 and 7.2 to the storage belt 3 and the web 14 a sealing effect is generated, which prevents the intake of foreign air. Thus, the longitudinal sides of the guide shaft 2 are closed to the environment substantially.
  • FIG. 6 a further embodiment is shown schematically in a cross-sectional view.
  • the embodiment is shown only in a section of the storage belt.
  • the components not shown here are identical to the aforementioned embodiments, so that further explanation is unnecessary at this point.
  • a plurality of spacers 19 are arranged at a distance from each other.
  • the spacers 19 have a rounded to the top of the storage tape 3 facing.
  • the spacers 19 are preferably formed with a crescent-shaped cross-section and extend as webs substantially over the entire width of the storage belt 3.
  • the suction gap 18 is in this case formed by the distance between the underside of the spacers 19 and the top of the cover plates 17.1 and 17.2.
  • the suction gap 18 is marked by the gap height with the reference symbol S.
  • the gap height is preferably set to max. 1 mm to 1.5 mm.
  • the distance between the spacer 19 is selected below the storage belt 3 such that on both sides of the suction opening 16 at least one spacer 19 is arranged in each case.
  • the spacers 19 arranged on both sides of the suction opening 16 are located within the storage area formed by the sealing lips 7.1 and 7.2 lying above the depositing belt 3.
  • the spacers 19 could also be made exchangeable to adjust different gap heights of the suction gap 18 can.
  • the embodiment of the device according to the invention Fig. 6 is thus characterized in particular by the fact that a small amount of external air from the environment passes into the suction device. Especially on the storage side the suction gaps are chosen such that the external air intake is sufficient to ensure a firm contact of the fleece to the storage belt.
  • Fig. 1 to 6 illustrated embodiments are exemplary in construction and design of the components.
  • the invention thus extends to all similar devices in which the movable shaft walls of a guide shaft to the storage belt out through sealing lips in sliding contact with the storage belt are held.
  • Fig. 1 . 2 and 6 could still be modified such that by shielding additional shielding of the end faces takes place. Such shielding could thus affect the fleece storage, especially at the edges of the storage belt. In addition, additional external air effects can be achieved.
  • Another variant of the device according to the invention could also be realized by an automated actuator control of the stoppers or the cover plates.
  • an automated actuator control of the stoppers or the cover plates can also be realized by an automated actuator control of the stoppers or the cover plates.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for depositing synthetic fibers into a nonwoven according to the preamble of claim 1.

Bei der Herstellung von Spinnvliesen werden in der Regel frisch gesponnene synthetische Fasern mittels einer Abzugsdüse zu einer Spinneinrichtung abgezogen und zur Ablage auf ein Ablageband gefördert. Die Führung und Förderung der Fasern wird durch einen Luftstrom der Abzugsdüse bewirkt, der durch eine unterhalb des Ablagebands angeordnete Absaugeinrichtung aufgenommen und abgeführt wird. Die sich auf der Bandoberfläche des Ablagebandes ansammelnden Fasern führen zu einem Vlies, das kontinuierlich durch das Ablageband gefördert wird. Die Vliesbildung ist abhängig vom Auftreffen der Fasern auf das Ablageband sowie der Bandgeschwindigkeit. Insbesondere das Auftreffen der Fasern kann durch Veränderung der Luftströmung beeinflusst werden.In the production of spunbonds, as a rule, freshly spun synthetic fibers are drawn off by means of a draw-off nozzle to a spinning device and conveyed onto a storage belt for depositing. The guiding and conveying of the fibers is effected by an air flow of the draw-off nozzle, which is taken up and removed by a suction device arranged below the storage belt. The accumulating on the strip surface of the storage belt fibers lead to a nonwoven, which is continuously conveyed through the storage belt. The web formation is dependent on the impact of the fibers on the storage belt and the belt speed. In particular, the impact of the fibers can be influenced by changing the air flow.

So ist beispielsweise aus der DE 37 40 893 A1 eine Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies bekannt, bei welcher in einem dem Ablageband vorgeordneten Führungsschacht mehrere bewegliche Stauklappen angeordnet sind, um einerseits die Luftströmung der Abzugsdüse und andererseits die Luftströmung bei Auftreffen auf das Ablageband zu beeinflussen. So weist der Führungsschacht an den zum Ablageband hingewandten Enden jeweils eine schwenkbar gehaltene Stauklappe, auf die relativ zum Ablageband mit unterschiedlichen Anstellwinkeln gehalten werden können.For example, from the DE 37 40 893 A1 a device for depositing synthetic fibers to a nonwoven known in which a plurality of movable stowage flaps are arranged in a storage belt upstream of the depositing belt, on the one hand to influence the air flow of the Abzugsdüse and on the other hand the air flow upon impact with the depositing belt. Thus, the guide shaft at the end facing the storage tape ends each have a pivotally held damper flap, which can be held relative to the storage belt with different angles of attack.

Die bekannte Vorrichtung besitzt jedoch den Nachteil, dass zwischen den Enden des Führungsschachtes und dem Ablageband Spalte gebildet sind. Derartige Spalten führen dazu, dass die Absaugeinrichtung neben dem zugeführten Luftstrom einen wesentlichen Anteil an der Umgebungsluft mit einsaugt. Damit tritt neben einem höheren Luftverbrauch insbesondere eine direkte Beeinflussung der Faserablage zur Bildung des Vlieses ein. Es besteht die Gefahr, sogenannte Verwehungen im Vlies zu erhalten.However, the known device has the disadvantage that gaps are formed between the ends of the guide shaft and the storage belt. Such gaps cause the suction device in addition to the supplied air flow with a significant proportion of the ambient air with sucks. Thus, in addition to a higher air consumption, in particular a direct influence of the fiber deposit to form the fleece. There is a risk of getting so-called drifts in the fleece.

Aus der US 6,379,136 ist eine Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies bekannt, bei welcher am Ende des Führungsschachtes der Ablagebereich der Fasern durch Dichtungswalzen gegenüber der Umgebung abgedichtet ist. Diese Vorrichtung besitzt jedoch den Nachteil, dass die Fasern in einem konstant gehaltenen Ablagebereich ablegbar sind. Eine Veränderung des Ablagebereiches am Ablageband ist nicht möglich.From the US 6,379,136 a device for depositing synthetic fibers to a nonwoven is known, in which at the end of the guide shaft, the storage area of the fibers is sealed by sealing rollers against the environment. However, this device has the disadvantage that the fibers can be stored in a storage area kept constant. A change of the storage area on the storage belt is not possible.

Es ist nun Aufgabe der Erfindung eine Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies der gattungsgemäßen Art derart weiterzubilden, dass die Ablage der Fasern mit einer möglichst großen Flexibilität ohne wesentliche Fremdeinwirkung steuerbar ist.It is an object of the invention to develop a device for storing synthetic fibers to a nonwoven of the generic type such that the filing of the fibers with the greatest possible flexibility is controlled without significant external influence.

Ein weiteres Ziel der Erfindung liegt darin, eine Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies bereitzustellen, mit welcher Vliese mit reproduzierbaren Vliesqualitäten herstellbar sind.Another object of the invention is to provide a device for depositing synthetic fibers to a nonwoven, with which nonwovens can be produced with reproducible nonwoven qualities.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Stauklappe des Führungsschachtes durch einen Träger und eine elastische Dichtlippe gebildet ist, welche Dichtlippe im schleifenden Kontakt mit dem Ablageband steht.This object is achieved in that the storage flap of the guide shaft is formed by a support and an elastic sealing lip, which sealing lip is in sliding contact with the storage belt.

Die Erfindung zeichnet sich dadurch aus, dass an der Längsseite des Führungsschachtes zwischen dem Ablageband und dem Ende des Führungsschachtes eine Abdichtung erfolgt, die den Ablagebereich zur Umgebung hin abschirmt. Die Elastizität der Dichtlippe bewirkt eine Vorspannung, die bei schleifendem Kontakt ein Abheben oder Trennen der Dichtlippe verhindert. Andererseits lassen sich Unebenheiten an dem Ablageband vorteilhaft durch die Dichtlippe ausgleichen. Somit lässt sich ein Ansaugen von Fremdluft vermeiden.The invention is characterized in that on the longitudinal side of the guide shaft between the storage belt and the end of the guide shaft sealing takes place, which shields the storage area to the environment. The elasticity of the sealing lip causes a bias that prevents lifting or separating the sealing lip with sliding contact. On the other hand, unevennesses on the depositing belt can advantageously be compensated by the sealing lip. Thus, a suction of external air can be avoided.

Um eine möglichst komplette Abschirmung des Ablagebereiches auf dem Ablageband zu erhalten, weist gemäß einer vorteilhaften Weiterbildung der Erfindung der Führungsschacht an der gegenüberliegenden Längsseite eine zweite beweglich gehaltene Stauklappe auf, die durch einen zweiten Träger und eine zweite elastische Dichtlippe gebildet ist, welche Dichtlippe bei Betrieb in schleifenden Kontakt mit dem auf dem Ablageband abgelegen Vlies gehalten ist. Damit lässt sich vorteilhaft an der Längsseite des Führungsschachtes, an welcher der Vlies aus dem Ablagebereich geführt wird eine hohe Dichtwirkung gegenüber Fremdlufteinzug erzielen. Die Ablage der Fasern erfolgt somit im wesentlichen ohne Einwirkung von angesaugter Umgebungsluft. Zudem bleibt die Einstellbarkeit der Stauklappen relativ zu dem Ablageband vollständig erhalten. Hierzu wird der Träger mit der gehaltenen elastischen Dichtlippe in unterschiedliche Positionen relativ zum Ablageband führen. Durch die Einstellbarkeit der Träger und Dichtlippen ist die Möglichkeit gegeben, den Ablagewinkel sowie das gesamte Ablagebild der Fasern zu beeinflussen. So können breite oder schmale Ablagebereiche an dem Ablageband eingestellt werden.In order to obtain as complete a shielding of the storage area on the storage belt, according to an advantageous development of the invention, the guide shaft on the opposite longitudinal side on a second movably held damper, which is formed by a second carrier and a second elastic sealing lip, which sealing lip during operation held in sliding contact with the fleece deposited on the storage belt. This can be advantageously on the longitudinal side of the guide shaft, on which the fleece is guided from the storage area to achieve a high sealing effect against outside air intake. The deposition of the fibers is thus carried out substantially without the action of sucked ambient air. In addition, the adjustability of the stowage flap is completely preserved relative to the storage belt. For this purpose, the carrier will lead with the held elastic sealing lip in different positions relative to the storage belt. Due to the adjustability of the carrier and sealing lips, it is possible to influence the storage angle and the entire storage image of the fibers. So wide or narrow storage areas can be set on the storage belt.

Die Dichtlippen sind gemäß einer vorteilhaften Weiterbildung der Erfindung auswechselbar mit den Trägern verbunden, so dass bei verschlissenen Dichtlippen entsprechende Wartungsarbeiten schnell ausgeführt werden können.The sealing lips are interchangeably connected according to an advantageous embodiment of the invention with the carriers, so that with worn sealing lips corresponding maintenance can be performed quickly.

Um möglichst hohe Standzeiten zu erhalten, werden die Dichtlippen bevorzugt aus einem dünnen Stahlblech gebildet, welches mit seinem freien Ende an dem Ablageband bzw. dem Vlies aufliegt.In order to obtain the longest possible service life, the sealing lips are preferably formed from a thin sheet steel, which rests with its free end on the storage belt or the fleece.

Zur weiteren Verbesserung besteht auch die Möglichkeit, die Dichtlippen zumindest im Kontaktbereich mit einem Verschleißschutz auszubilden. Bei Verwendung eines Stahlbleches könnten diese durch eine besondere Beschichtung im Kontaktbereich ausgebildet sein.To further improve it is also possible to form the sealing lips at least in the contact area with a wear protection. When using a steel sheet, these could be formed by a special coating in the contact area.

Zur Verstellung des Ablagebereiches an dem Ablageband hat sich insbesondere bewährt, dass die Träger schwenkbar gelagert sind und jedem der Träger jeweils ein Stellantrieb zugeordnet ist, durch welche ein sich zwischen dem Ablageband und der Dichtlippe eingeschlossener Anstellwinkel änderbar und einstellbar ist. Damit lassen sich beliebige und reproduzierbare Anstellwinkel an dem Führungsschacht vorgeben.To adjust the storage area on the storage tape has proven particularly useful that the carrier are pivotally mounted and each of the carrier is associated with an actuator, by which an enclosed between the storage belt and the sealing lip angle of attack is changeable and adjustable. This allows arbitrary and reproducible angle set on the guide shaft.

Die Flexibilität der Einstellbarkeit zur Ablage der Fasern lässt sich vorteilhaft noch dadurch erhöhen, dass der Führungsschacht mittels einer Halterung unterhalb der Abzugsdüse gehalten ist, wobei die sich in den Längsseiten gegenüberliegenden Halteelemente eine Verschiebung und Einstellung der zugeordneten Schachtelemente ermöglichen. Damit kann die Beeinflussung der Ablage bereits unmittelbar bei Verlassen der Fasern aus der Abzugsdüse erfolgen.The flexibility of adjustability for depositing the fibers can be advantageously further increased by the guide shaft is held by means of a holder below the exhaust nozzle, wherein the opposite in the longitudinal sides holding elements allow a shift and adjustment of the associated shaft elements. Thus, the influence of the tray can already be done directly on leaving the fibers from the drawing-off nozzle.

Um neben dem Ablagebereich möglichst die Form der Faserablage zu beeinflussen, ist weiter vorgesehen, dass unterhalb des Ablegebandes eine verstellbare Saugöffnung ausgebildet ist, durch welche die Absaugeinrichtung mit der Unterseite des Ablagebandes verbunden ist.In order to influence the shape of the fiber deposit as possible in addition to the storage area, it is further provided that below the deposit belt an adjustable suction opening is formed, through which the suction device is connected to the underside of the storage belt.

Hierbei lässt sich die Saugöffnung vorteilhaft zwischen zwei relativ zueinander verschiebbar gehaltenen Abdeckblechen bilden, so dass die Faserablage z.B. bei enger Saugöffnung sehr kompakt oder bei entsprechender breiter Saugöffnung aufgefächerter erfolgen kann.In this case, the suction opening can advantageously be formed between two cover plates which are held so as to be displaceable relative to one another, so that the fiber deposit can e.g. can be made very compact at a narrow suction opening or fanned with a corresponding wide suction opening.

Um ein Abheben des Vlieses von dem Ablageband außerhalb des Ablagebereiches zu verhindern, hat sich insbesondere ein zwischen dem Abdeckblechen und dem Ablageband gebildeter Saugspalt bewährt, der zu einem definierten Einsaugen von Fremdluft aus den Bereichen außerhalb des Ablagebereiches ermöglicht.In order to prevent lifting of the web from the storage tape outside the storage area, in particular a formed between the cover plate and the storage belt suction gap has proven, which allows for a defined suction of outside air from the areas outside the storage area.

Der zwischen den Abdeckblechen und dem Ablageband gebildete Saugspalt ist dabei vorzugsweise einstellbar ausgebildet, so dass die Menge der angesaugten Fremdluft individuell an die Prozessparameter angepasst werden kann. Die Einstellbarkeit lässt sich dabei durch eine Höhenverstellung der Abdeckbleche realisieren.The suction gap formed between the cover plates and the storage belt is preferably designed to be adjustable, so that the amount of the sucked-in external air can be adapted individually to the process parameters. The adjustability can be realized by a height adjustment of the cover plates.

Bei einer besonders bewährten Weiterbildung der Erfindung sind zwischen den Abdeckblechen und dem Ablageband mehrere Abstandshalter angeordnet, die zu der dem Ablageband zugewandten Oberseite eine Verrundung vorzugsweise einen halbförmigen Querschnitt aufweisen, so dass eine Abstützung und Führung des Ablagebandes gewährleistet ist. Zwischen den Unterseiten der Abstandshalter und den Abdeckblechen ist jeweils der Saugspalt gebildet, durch welchen nur eine definierte Menge an Fremdluft in den Absaugbereich eintreten kann. Der Saugspalt wird dabei vorzugsweise im Bereich von 1 bis 1,5 mm eingestellt.In a particularly well-proven embodiment of the invention, a plurality of spacers are arranged between the cover plates and the storage belt, which have a semi-circular cross-section to the top of the depositing tape facing a rounding, so that a support and guidance of the storage belt is guaranteed. Between the bottoms of the spacers and the cover plates, the suction gap is formed, through which only a defined amount of external air can enter the suction area. The suction gap is preferably set in the range of 1 to 1.5 mm.

Zur weiteren Verbesserung der Flexibilität der Einstellbarkeit besteht bei einer weiteren bevorzugten Weiterbildung der Erfindung die Möglichkeit, eine Ablagehöhe zwischen der Abzugsdüse und dem Ablageband zu ändern und einzustellen.To further improve the flexibility of adjustability is in a further preferred embodiment of the invention, the ability to change a storage height between the discharge nozzle and the storage belt and set.

Hierbei können die Höhenunterschiede durch Austausch der Dichtlippen oder durch Veränderung der Anstellwinkel der Stauklappen realisiert werden.Here, the height differences can be realized by replacing the sealing lips or by changing the angle of attack of the jam flaps.

Die erfindungsgemäße Vorrichtung zeichnet sich somit durch ein Höchstmaß an Flexibilität zur Vliesablage aus. Hierbei kann in Abhängigkeit vom Fasertyp, Fasermaterial und Vliesanforderung die gewünschten Einstellparameter zur Herstellung eines bestimmten Vlieses eingestellt werden. Dabei besteht die Möglichkeit, die Einstellungen durch steuerbare Aktoren auszuführen, die beispielsweise mittels einer Steuereinrichtung nach Vorgabe von Prozessparametern automatisiert angesteuert werden.The device according to the invention is thus characterized by a maximum of flexibility for nonwoven storage. In this case, depending on the type of fiber, fiber material and fleece requirement, the desired setting parameters for producing a specific fleece can be set. It is possible to perform the settings by controllable actuators, which are automatically controlled, for example by means of a control device according to the specification of process parameters.

Die erfindungsgemäße Vorrichtung ist nachfolgend unter Hinweis auf die beigefügten Figuren anhand einiger Ausführungsbeispiele nähe erläutert.The device of the invention is explained below with reference to the accompanying figures with reference to some embodiments near.

Es stellen dar:

Fig. 1
schematisch eine Ansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Vorrichtung
Fig. 2
schematisch eine Querschnittsansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung
Fig. 3 bis Fig. 5
das Ausführungsbeispiel aus Fig. 2 in verschiedenen Betriebseinstellungen
Fig. 6
schematisch eine Querschnittsansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung
They show:
Fig. 1
schematically a view of a first embodiment of the device according to the invention
Fig. 2
schematically a cross-sectional view of another embodiment of the device according to the invention
FIG. 3 to FIG. 5
the embodiment Fig. 2 in different operating settings
Fig. 6
schematically a cross-sectional view of another embodiment of the device according to the invention

In Fig 1 ist ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies schematisch gezeigt.In Fig. 1 a first embodiment of the device according to the invention for depositing synthetic fibers to a nonwoven fabric is shown schematically.

Das Ausführungsbeispiel nach Fig. 1 zeigt eine quaderförmige Abzugsdüse 1 mit einem mittleren Faserkanal 12. In dem Faserkanal 12 werden eine Mehrzahl von Fasern 13 reihenförmig geführt. Die Fasern 13 werden zuvor mittels einer hier nicht dargestellten Spinneinrichtung aus einer synthetischen Polymerschmelze gesponnen.The embodiment according to Fig. 1 shows a rectangular discharge nozzle 1 with a central fiber channel 12. In the fiber channel 12, a plurality of fibers 13 are guided in rows. The fibers 13 are previously spun by means of a spinning device, not shown here, from a synthetic polymer melt.

In der Abzugsdüse 1 wird in dem Faserkanal 12 eine Druckluft zugeführt, so dass die Fasern 13 kontinuierlich aus der Spinneinrichtung abgezogen und auf einer Auslassseite der Abzugsdüse 1 gefördert. Auf der Auslassseite der Abzugsdüse 1 ist ein Führungsschacht 2 und ein am Ende des Führungsschachtes 2 angeordnetes Ablageband 3 vorgesehen. Der Führungsschacht 2 weist zwei sich gegenüberliegende Schachtwände 10.1 und 10.2 auf, die im wesentlichen parallel zu dem Faserkanal 12 der Abzugsdüse 1 angeordnet sind. Die Schachtwände 10.1 und 10.2 werden hierbei vorzugsweise dichtend an der Auslassseite der Abzugsdüse 1 gehalten.In the draw-off nozzle 1, a compressed air is supplied in the fiber channel 12 so that the fibers 13 are continuously withdrawn from the spinning device and conveyed on an outlet side of the draw-off nozzle 1. On the outlet side of the haul-off nozzle 1, a guide shaft 2 and a storage belt 3 arranged at the end of the guide shaft 2 are provided. The guide shaft 2 has two opposite shaft walls 10.1 and 10.2, which are arranged substantially parallel to the fiber channel 12 of the discharge nozzle 1. The shaft walls 10.1 and 10.2 are in this case preferably held sealingly on the outlet side of the draw-off nozzle 1.

An den Längsseiten des Führungsschachtes 2 sind in Verlängerung der Schachtwände 10.1 und 10.2 jeweils zwei Stauklappen 5.1 und 5.2 angeordnet. Die Stauklappen 5.1 und 5.2 werden hierbei jeweils durch einen Träger 6.1 und 6.2 und einer mit dem Träger 6.1 und 6.2 auswechselbar verbundenen Dichtlippe 7.1 und 7.2 gebildet. Die Träger 6.1 und 6.2 sind jeweils über Schwenkachsen 8.1 und 8.2 in einem Anstellwinkel veränderbar. Hierbei stellt der Anstellwinkel den zwischen dem Ablageband 3 und der Stauklappe 5.1 bis 5.2 eingeschlossenen Winkel dar. Die Dichtlippen 7.1 und 7.2 sind elastisch derart ausgebildet, so dass ein unteres Ende der Dichtlippen 7.1 und 7.2 im schleifenden Kontakt zu dem Ablageband 3 bzw. dem auf dem Ablageband 3 geführten Vlies 14 steht. Der Bereich des Ablagebandes 3 innerhalb des Führungsschachtes 2 zwischen den Dichtlippen 7.1 und 7.2 wird hier als Ablagebereich bezeichnet.On the longitudinal sides of the guide shaft 2, two stowage flaps 5.1 and 5.2 are arranged in extension of the shaft walls 10.1 and 10.2. The storage flaps 5.1 and 5.2 are each formed by a support 6.1 and 6.2 and a 6.1 and 6.2 interchangeably connected to the support sealing lip 7.1 and 7.2. The carriers 6.1 and 6.2 are each variable via pivot axes 8.1 and 8.2 in an angle. Here, the angle of attack between the storage belt 3 and the damper 5.1 to 5.2 included angle. The sealing lips 7.1 and 7.2 are elastically configured so that a lower end of the sealing lips 7.1 and 7.2 in sliding contact with the storage belt 3 and the storage belt 3 guided fleece 14 is. The area of the storage belt 3 within the guide shaft 2 between the sealing lips 7.1 and 7.2 is referred to here as a storage area.

Das Ablageband 3 ist mit einer hier nicht dargestellten Antriebseinrichtung verbunden, durch welches das Ablageband 3 in einer durch Pfeil gekennzeichneten Förderrichtung führbar ist. Das Ablageband 3 ist luftdurchlässig ausgebildet, so dass der Luftstrom der Abzugsdüse 1 das Ablegeband 3 durchdringt. Zur Abführung und zur Unterstützung der Faserablage zur Vliesbildung ist auf der Unterseite des Ablagebandes 3 eine Absaugeinrichtung 4 angeordnet. Hierbei ist die Absaugwirkung der Absaugeinrichtung 4 auf den Ablagebereich innerhalb des Führungsschachtes 2 eingegrenzt.The storage belt 3 is connected to a drive device, not shown here, through which the storage belt 3 can be guided in a direction indicated by arrow conveying direction. The storage belt 3 is formed permeable to air, so that the air flow of the discharge nozzle 1 penetrates the deposit belt 3. For discharging and supporting the fiber tray for web formation, a suction device 4 is arranged on the underside of the storage belt 3. Here, the suction effect of the suction device 4 is limited to the storage area within the guide shaft 2.

Das in Fig. 1 dargestellte Ausführungsbeispiel ist in Betriebssituation gezeigt, in welcher die Fasern 13 kontinuierlich durch die Abzugsdüse 1 in den Faserkanal 12 geführt und zu dem Ablageband 3 gefördert werden. Hierbei durchlaufen die Fasern 13 den Führungsschacht 2. Durch die an den Längsseiten des Führungsschachtes 2 verstellbaren Stauklappen 5.1 und 5.2 wird einerseits der Ablagebereich des Ablagebandes 3 zur Umgebung der Längsseiten hin abgedichtet und andererseits die Lage des Ablagebereiches am Ablageband 3 bestimmt. Hierzu liegen die an den Trägern 6.1 und 6.2 gehaltenen Dichtlippen 7.1 und 7.2 elastisch an der Oberfläche des Ablagebandes 3 bzw. des durch das Ablageband 3 geförderten Vlieses 14 an. Durch den schleifenden Kontakt zwischen den Dichtlippen 7.1 und 7.2 und dem Ablageband 3 bzw. dem Vlies 14 wird das Einsaugen von Fremdluft in dem Ablagebereich über die gesamt Breite des Vlieses 14 verhindert. Die Fasern 13 werden ausschließlich unter Wirkung der Luftströmung und der Absaugung innerhalb des Führungsschachtes 2 abgelegt.This in Fig. 1 illustrated embodiment is shown in an operating situation in which the fibers 13 are continuously guided through the discharge nozzle 1 in the fiber channel 12 and conveyed to the storage belt 3. In this case, the fibers 13 pass through the guide shaft 2. By means of adjustable on the longitudinal sides of the guide shaft 2 stowage valves 5.1 and 5.2 on the one hand the storage area of the storage belt 3 sealed to the environment of the longitudinal sides and on the other hand determines the location of the storage area on the storage belt 3. For this purpose, the sealing lips 7.1 and 7.2 held on the supports 6.1 and 6.2 lie elastically against the surface of the deposition belt 3 or of the nonwoven 14 conveyed by the deposition belt 3. By the abrasive contact between the sealing lips 7.1 and 7.2 and the storage belt 3 and the web 14, the suction of foreign air in the storage area over the entire width of the web 14 is prevented. The fibers 13 are deposited exclusively under the action of the air flow and the suction within the guide shaft 2.

Bei dem in Fig. 1 dargestellten Ausführungsbeispiel sind die Stirnseiten des Führungsschachtes 2 nicht verschlossen. Es besteht jedoch grundsätzlich auch die Möglichkeit, die Stirnseiten des Führungsschachtes 2 dichtend gegenüber der Umgebung zu schließen.At the in Fig. 1 illustrated embodiment, the end faces of the guide shaft 2 are not closed. However, in principle it is also possible to close the end faces of the guide shaft 2 sealingly against the environment.

In dem Ausführungsbeispiel nach Fig. 1 sind den Stauklappen 5.1 und 5.2 jeweils Stellmittel 11 zugeordnet, durch welche die Anstellwinkel am Ende des Führungsschachtes 2 einstellbar und änderbar sind. Grundsätzlich besteht jedoch auch die Möglichkeit, derartig beweglich angeordnete Stauklappen 5.1 und 5.2 mit manuellen Stelleinrichtungen zu positionieren. Hierbei ist wesentlich, dass die Einstellung über die Träger 6.1 und 6.2 erfolgt. Die an den Trägern 6.1 und 6.2 gehaltenen Dichtlippen 7.1 und 7.2 dienen ausschließlich zur dichtenden Anlage an dem Ablageband 3 bzw. dem Vlies 14.In the embodiment according to Fig. 1 the stoppers are 5.1 and 5.2 respectively associated with adjusting means 11, by which the angle of attack at the end of the guide shaft 2 are adjustable and changeable. In principle, however, it is also possible to position such movably arranged stowage flaps 5.1 and 5.2 with manual adjusting devices. It is essential that the setting on the carrier 6.1 and 6.2 takes place. The sealing lips 7.1 and 7.2 held on the carriers 6.1 and 6.2 are used exclusively for sealing engagement with the depositing belt 3 or the fleece 14.

In Fig. 2 ist ein weiteres Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zur Ablage von synthetischen Fasern zu einem Vlies schematisch in einer Querschnittsansicht dargestellt. Das Ausführungsbeispiel nach Fig. 2 ist im wesentlichen identisch zu dem vorhergehenden Ausführungsbeispiel, so dass in der nachfolgenden Beschreibung nur die Unterschiede erläutert werden. Zur Ablage der Fasern 12 ist zwischen der Abzugsdüse 1 und dem Ablageband 3 eine im Verhältnis zu dem vorhergehenden Ausführungsbeispiel geringere Ablagehöhe eingestellt. Die Abzugsdüse 1 ist hierzu in ihrer Höhe verstellbar ausgebildet.In Fig. 2 a further embodiment of the device according to the invention for depositing synthetic fibers to a nonwoven fabric is shown schematically in a cross-sectional view. The embodiment according to Fig. 2 is substantially identical to the previous embodiment, so that in the following description, only the differences will be explained. For depositing the fibers 12, a lower storage height is set between the draw-off nozzle 1 and the storage belt 3 in relation to the preceding embodiment. The deduction nozzle 1 is designed to be adjustable in height.

Der zwischen der Abzugsdüse 1 und dem Ablageband 3 angeordnete Führungsschacht 2 wird in diesem Ausführungsbeispiel durch zwei sich gegenüberliegend angeordnete Stauklappen 5.1 und 5.2 gebildet. Die Stauklappe 5.1 weist einen Träger 6.1 auf, der an der Schwenkachse 8.1 schwenkbar gelagert ist. Die Schwenkachse 8.1 ist an einem Halteelement 15.1 der Halterung 9 angeordnet. Die Halterung 9 ist auf der Auslassseite der Abzugsdüse 1 angebracht. An dem freien Ende des Träger 6.1 ist eine Dichtlippe 7.1 beispielsweise in Form eines Stahlbleches auswechselbar befestigt. Die Länge der Dichtlippe 7.1 ist dabei derart bemessen, dass das untere Ende der Dichtlippe 7.1 im schleifenden Kontakt zu dem Ablageband 3 steht. An dem Träger 6.1 greift ein Stellmittel 11.1 an, durch welche der Träger 6.1 um die Schwenkachse 8.1 verschwenkbar ist.The arranged between the discharge nozzle 1 and the storage belt 3 guide shaft 2 is formed in this embodiment by two oppositely arranged storage flaps 5.1 and 5.2. The storage flap 5.1 has a carrier 6.1, which is pivotally mounted on the pivot axis 8.1. The pivot axis 8.1 is arranged on a holding element 15.1 of the holder 9. The bracket 9 is mounted on the outlet side of the exhaust nozzle 1. At the free end of the carrier 6.1, a sealing lip 7.1 is interchangeably fixed, for example in the form of a steel sheet. The length of the sealing lip 7.1 is dimensioned such that the lower end of the sealing lip 7.1 in sliding contact with the storage belt 3 is. On the support 6.1 engages an actuating means 11.1, through which the carrier 6.1 is pivotable about the pivot axis 8.1.

Auf der gegenüber liegenden Längsseite des Führungsschachtes 2 ist die Stauklappe 5.2 durch den Träger 6.2 und der Dichtlippe 7.2 angeordnet. Der Träger 6.2 wird an der Schwenkachse 8.2 geführt, wobei die Schwenkachse 8.2 an dem Halteelement 15.2 angeordnet ist. Am freien Ende des Trägers 6.2 ist eine Dichtlippe 7.2 auswechselbar befestigt, die mit ihrem freien Ende im schleifenden Kontakt zu einem auf dem Ablageband 3 geführten Vlies 14 steht. Die Dichtlippe 7.2 könnte ebenfalls als ein Stahlblech beispielsweise mit einer Dicke von 0,2 mm ausgebildet sein. An dem Träger 6.2 greift ein Stellmittel 11.2 an, durch welches der Träger um die Schwenkachse 8.2 verschwenkbar und positionierbar ist.On the opposite longitudinal side of the guide shaft 2, the storage flap 5.2 is arranged by the carrier 6.2 and the sealing lip 7.2. The carrier 6.2 is guided on the pivot axis 8.2, wherein the pivot axis 8.2 is arranged on the holding element 15.2. At the free end of the support 6.2, a sealing lip 7.2 is interchangeably attached, which stands with its free end in sliding contact with a guided on the storage belt 3 fleece 14. The sealing lip 7.2 could also be formed as a steel sheet, for example, with a thickness of 0.2 mm. On the support 6.2 engages an actuating means 11.2, through which the carrier is pivotable about the pivot axis 8.2 and positionable.

Die Halterung 9 wird durch die sich gegenüberliegenden Halteelemente 15.1 und 15.2 gebildet. Dabei sind die Halteelemente 15.1 und 15.2 horizontal verschiebbar ausgebildet, so dass der Führungsschacht 2 in seiner Breite quer zur Förderrichtung der Fasern einstellbar ist.The holder 9 is formed by the opposing holding elements 15.1 and 15.2. The holding elements 15.1 and 15.2 are designed to be horizontally displaceable, so that the guide shaft 2 is adjustable in its width transversely to the conveying direction of the fibers.

Bei Veränderung der Ablagehöhe zwischen der Abzugsdüse 1 und dem Ablageband 3 läßt sich der Längenausgleich in dem Führungsschacht 2 entweder durch Auswechslung der Dichtlippen 7.1 und 7.2 durch entsprechend kürzere oder längere Dichtlippen oder durch Veränderung der Anstellwinkel der Träger 6.1 und 6.2 kompensieren.When changing the storage height between the discharge nozzle 1 and the storage belt 3, the length compensation in the guide shaft 2 can be compensated either by replacing the sealing lips 7.1 and 7.2 by correspondingly shorter or longer sealing lips or by changing the angle of attack of the carrier 6.1 and 6.2.

Unterhalb des Ablagebandes 3 ist die Absaugeinrichtung 4 ausgebildet. Die Absaugeinrichtung 4 weist eine verstellbare Saugöffnung 16 auf, die unmittelbar dem Ablagebereich an dem Ablageband 3 zugeordnet ist. Die Saugöffnung 16 ist hierbei zwischen zwei verschiebbar angeordneten Abdeckblechen 17.1 und 17.2 gebildet. Jedes der Abdeckbleche 17.1 und 17.2 läßt sich relativ zueinander horizontal verschieben. Zwischen den Abdeckblechen 17.1. und 17.2 und dem Ablageband 3 ist ein minimaler Saugspalt 18 gebildet. Der Saugspalt 18 ist derart bemessen, dass eine Fremdluft außerhalb des Ablagebereiches über das Ablageband 3 ansaugbar ist. Insbesondere im Bereich der Vliesführung lässt sich damit ein Abheben des Vlieses 14 von dem Ablageband 3 vermeiden. Eine zusätzliche Absaugung in Förderrichtung des Vlieses 14 kann damit entfallen. Um möglichst eine geringe und definierte Menge Fremdluft einzusaugen, ist der Saugspalt 18 einstellbar ausgebildet, beispielsweise durch eine Höhenverstellung der Abdeckbleche 17.1 und 17.2.Below the storage belt 3, the suction device 4 is formed. The suction device 4 has an adjustable suction opening 16, which is assigned directly to the storage area on the storage belt 3. The suction opening 16 is in this case formed between two slidably arranged cover plates 17.1 and 17.2. Each of the cover plates 17.1 and 17.2 can be horizontal relative to each other move. Between the cover plates 17.1. and 17.2 and the storage belt 3, a minimum suction gap 18 is formed. The suction gap 18 is dimensioned such that a foreign air outside of the storage area on the storage belt 3 can be sucked. In particular in the area of the nonwoven guide, it is thus possible to avoid lifting off the nonwoven 14 from the depositing belt 3. An additional suction in the conveying direction of the web 14 can thus be omitted. To suck as possible a small and defined amount of external air, the suction gap 18 is formed adjustable, for example by a height adjustment of the cover plates 17.1 and 17.2.

Die Funktion des in Fig. 2 dargestellten Ausführungsbeispiels ist identisch zu dem vorhergehenden Ausführungsbeispiel, so dass auf die vorhergehende Beschreibung Bezug genommen werden kann. Aufgrund der flexiblen Ausbildung des Führungsschachtes 2 sind jedoch eine Vielzahl von Einstellungsmöglichkeiten ausführbar, um eine besondere Faserablage und damit ein bestimmtes Vlies zu erhalten. Hierbei könnten die Verstellbewegungen der Haltelemente 15.1 und 15.2, der Abzugsdüse 1, der Abdeckbleche 17.1 und 17.2 automatisiert durch Aktoren ausgeführt werden, die beispielsweise über eine zentrale Steuereinrichtung steuerbar sind. So besteht die Möglichkeit, in Abhängigkeit von vorgegebenen Produkt- und Prozessparametern eine automatische Einstellung der verschiedenen Stellglieder aufzuführen.The function of in Fig. 2 illustrated embodiment is identical to the previous embodiment, so that reference can be made to the preceding description. Due to the flexible design of the guide shaft 2, however, a variety of setting options are executable to obtain a special fiber deposit and thus a specific fleece. In this case, the adjusting movements of the holding elements 15.1 and 15.2, the withdrawal nozzle 1, the cover plates 17.1 and 17.2 could be performed automatically by actuators, which are controllable for example via a central control device. Thus, it is possible to perform an automatic adjustment of the various actuators depending on predetermined product and process parameters.

In den Fig. 3 bis 5 sind einige Varianten von Betriebseinstellungen der in Fig. 2 dargestellten Vorrichtung gezeigt.In the Fig. 3 to 5 are some variants of operational settings of the Fig. 2 shown device shown.

So lässt sich beispielsweise ein relativ breiter Ablagebereich dadurch realisieren, dass wie in Fig. 3 gezeigt die Stauklappen 5.1 und 5.2 jeweils nach außen verschwenkt gehalten sind. Eine entsprechend große Saugöffnung 16 auf der Unterseite des Ablagebandes 3 führt somit zu einer Aufspreizung der Faser bei Ablage, so dass ein relativ lockerer Vlies entsteht.Thus, for example, a relatively wide storage area can be realized by the fact that as in Fig. 3 shown the storage flaps 5.1 and 5.2 are each pivoted outwardly. A correspondingly large suction opening 16 on the underside of the storage belt 3 thus leads to a spreading of the fiber during storage, so that a relatively loose fleece is formed.

In Fig. 4 ist eine Betriebseinstellung der Vorrichtung aus Fig. 2 dargestellt, bei welcher die Stauklappen 5.1 und 5.2 einen relativ schmalen Ablagebereich auf dem Ablageband 3 definieren, so dass mit entsprechend kleiner Saugöffnung 16 ein relativ schmaler Ablagebereich auf dem Ablageband 3 erzeugt wird. Hierbei werden die Fasern 13 nahezu senkrecht auf das Ablageband 3 abgelegt, so dass damit insbesondere kompakte und feste Vliese erzeugbar sind.In Fig. 4 is an operational setting of the device Fig. 2 illustrated, in which the storage flaps 5.1 and 5.2 define a relatively narrow storage area on the storage belt 3, so that with a correspondingly small suction opening 16, a relatively narrow storage area on the storage belt 3 is generated. In this case, the fibers 13 are deposited almost perpendicularly on the depositing belt 3, so that in particular compact and strong nonwovens can be produced.

In Fig. 5 ist eine weitere Möglichkeit einer Betriebseinstellung der in Fig. 2 dargestellten Vorrichtung schematisch gezeigt. Hierbei wird ein relativ breiter Ablagebereich auf dem Ablageband erzeugt, der seitlich versetzt zu der Auslassseite der Abzugsdüse angeordnet ist. Somit werden die Fasern unter einem relativ flachen Winkel auf das Ablageband 3 abgelegt.In Fig. 5 is another way of ceasing operations in Fig. 2 shown device shown schematically. In this case, a relatively wide storage area is produced on the storage belt, which is arranged laterally offset from the outlet side of the discharge nozzle. Thus, the fibers are deposited on the depositing belt 3 at a relatively shallow angle.

Die in den Fig. 3 bis 5 dargestellten Betriebseinstellungen zeigen nur eine kleine Bandbreite der möglichen Einstellvarianten der erfindungsgemäßen Vorrichtung. Alle Betriebseinstellungen der erfindungsgemäßen Vorrichtung haben gemein, dass der Fremdlufteinfluß bei der Ablage der Fasern auf ein Minimum reduziert wird. Durch den schleifenden Kontakt zwischen den Dichtlippen 7.1 und 7.2 zu dem Ablageband 3 und dem Vlies 14 wird eine Dichtwirkung erzeugt, die das Einsaugen von Fremdluft verhindert. Damit sind die Längsseiten des Führungsschachtes 2 zur Umgebung hin im wesentlichen verschlossen.The in the Fig. 3 to 5 shown operating settings show only a small bandwidth of the possible adjustment variants of the device according to the invention. All operating settings of the device according to the invention have in common that the influence of outside air during the deposition of the fibers is reduced to a minimum. Due to the sliding contact between the sealing lips 7.1 and 7.2 to the storage belt 3 and the web 14 a sealing effect is generated, which prevents the intake of foreign air. Thus, the longitudinal sides of the guide shaft 2 are closed to the environment substantially.

In Fig. 6 ist ein weiteres Ausführungsbeispiel in einer Querschnittsansicht schematisch dargestellt. Hierbei ist das Ausführungsbeispiel nur in einem Ausschnitt des Ablagebandes gezeigt. Die hier nicht dargestellten Bauteile sind identisch zu den vorgenannten Ausführungsbeispielen, so dass eine weitere Erläuterung an dieser Stelle entbehrlich ist.In Fig. 6 a further embodiment is shown schematically in a cross-sectional view. Here, the embodiment is shown only in a section of the storage belt. The components not shown here are identical to the aforementioned embodiments, so that further explanation is unnecessary at this point.

Um einerseits den Einfluss der Fremdluft gezielt zu beeinflussen und andererseits eine stabile Führung des Ablagebandes zu erhalten, sind bei dem dargestellten Ausführungsbeispiel zwischen dem Ablageband 3 und dem unterhalb des Ablagebandes 3 angeordneten Abdeckblechen 17.1 und 17.2 mehrere Abstandshalter 19 in Abstand zueinander angeordnet. Die Abstandshalter 19 weisen zu der an das Ablageband 3 gewandten Oberseite eine Verrundung auf. Hierzu sind die Abstandshalter 19 vorzugsweise mit einem halbmondförmigen Querschnitt ausgebildet und erstrecken sich als Stege im wesentlichen über die gesamte Breite des Ablagebandes 3. Somit ist eine Abstützung und Führung des Ablagebandes 3 gegenüber dem gebildeten Saugspalt 18 gewährleistet. Der Saugspalt 18 ist hierbei durch den Abstand zwischen der Unterseite der Abstandshalter 19 und der Oberseite der Abdeckbleche 17.1 und 17.2 gebildet. In Fig. 6 ist der Saugspalt 18 durch die Spalthöhe mit dem Bezugszeichen S gekennzeichnet. Die Spalthöhe wird vorzugsweise auf max. 1 mm bis 1,5 mm eingestellt.On the one hand to influence the influence of the outside air on the one hand and on the other hand to obtain a stable guidance of the storage belt, in the illustrated embodiment between the storage belt 3 and arranged below the storage belt 3 cover plates 17.1 and 17.2 a plurality of spacers 19 are arranged at a distance from each other. The spacers 19 have a rounded to the top of the storage tape 3 facing. For this purpose, the spacers 19 are preferably formed with a crescent-shaped cross-section and extend as webs substantially over the entire width of the storage belt 3. Thus, a support and guidance of the storage belt 3 with respect to the suction gap 18 is ensured. The suction gap 18 is in this case formed by the distance between the underside of the spacers 19 and the top of the cover plates 17.1 and 17.2. In Fig. 6 the suction gap 18 is marked by the gap height with the reference symbol S. The gap height is preferably set to max. 1 mm to 1.5 mm.

Der Abstand zwischen dem Abstandshalter 19 ist unterhalb des Ablagebandes 3 derart gewählt, dass zu beiden Seiten der Saugöffnung 16 zumindest jeweils ein Abstandshalter 19 angeordnet ist. Dabei befinden sich die zu beiden Seiten der Saugöffnung 16 angeordneten Abstandshalter 19 innerhalb des durch die oberhalb des Ablagebandes 3 anliegenden Dichtlippen 7.1 und 7.2 gebildeten Ablagebereiches. Die Abstandshalter 19 könnten zudem auswechselbar ausgebildet sein, um unterschiedliche Spalthöhen des Saugspaltes 18 einstellen zu können.The distance between the spacer 19 is selected below the storage belt 3 such that on both sides of the suction opening 16 at least one spacer 19 is arranged in each case. In this case, the spacers 19 arranged on both sides of the suction opening 16 are located within the storage area formed by the sealing lips 7.1 and 7.2 lying above the depositing belt 3. The spacers 19 could also be made exchangeable to adjust different gap heights of the suction gap 18 can.

Das Ausführungsbeispiel der erfindungsgemäßen Vorrichtung nach Fig. 6 zeichnet sich somit besonders dadurch aus, dass eine geringe Menge Fremdluft aus der Umgebung in die Absaugeinrichtung gelangt. Insbesondere auf der Ablageseite werden die Saugspalte derart gewählt, dass die Fremdluftansaugung ausreicht, um eine feste Anlage des Vlieses an dem Ablageband zu gewährleisten.The embodiment of the device according to the invention Fig. 6 is thus characterized in particular by the fact that a small amount of external air from the environment passes into the suction device. Especially on the storage side the suction gaps are chosen such that the external air intake is sufficient to ensure a firm contact of the fleece to the storage belt.

Die in den Fig. 1 bis 6 dargestellten Ausführungsbeispiele sind im Aufbau und Ausbildung der Bauteile beispielhaft. Die Erfindung erstreckt sich somit auf alle ähnlichen Vorrichtungen, bei welchen die beweglichen Schachtwände eines Führungsschachtes zum Ablageband hin durch Dichtlippen im schleifenden Kontakt mit dem Ablageband gehalten sind.The in the Fig. 1 to 6 illustrated embodiments are exemplary in construction and design of the components. The invention thus extends to all similar devices in which the movable shaft walls of a guide shaft to the storage belt out through sealing lips in sliding contact with the storage belt are held.

Die Ausführungsbeispiele nach Fig. 1, 2 und 6 könnten noch derart modifiziert werden, dass durch zusätzliche Abschirmmittel auch eine Abschirmung der Stirnseiten erfolgt. Derartige Abschirmmittel könnten somit insbesondere an den Rändern des Ablagebandes die Vliesablage beeinflussen. Zudem lassen sich zusätzliche Fremdlufteffekte erzielen.The embodiments according to Fig. 1 . 2 and 6 could still be modified such that by shielding additional shielding of the end faces takes place. Such shielding could thus affect the fleece storage, especially at the edges of the storage belt. In addition, additional external air effects can be achieved.

Eine weitere Variante der erfindungsgemäßen Vorrichtung ließe sich auch durch eine automatisierte Aktorensteuerung der Stauklappen oder der Abdeckbleche realisieren. Somit lassen sich eine Vielzahl von Prozesseinstellungen schnell und reproduzierbar wählen, um jeweils in Abhängigkeit vom Faser- und Vliestyp optimale Betriebsbedingungen zu erhalten.Another variant of the device according to the invention could also be realized by an automated actuator control of the stoppers or the cover plates. Thus, a variety of process settings can be selected quickly and reproducibly, in order to obtain optimal operating conditions depending on the fiber and nonwoven type.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Abzugsdüsenavel
22
Führungsschachtguide shaft
33
Ablagebanddepositing belt
44
Absaugeinrichtungsuction
5.1,5.25.1,5.2
Stauklappejam door
6.1,6.26.1,6.2
Trägercarrier
7.1, 7.27.1, 7.2
Dichtlippesealing lip
8.1,8.28.1,8.2
Schwenkachseswivel axis
99
Halterungbracket
10.1, 10.210.1, 10.2
Schachtwandshaft wall
11.1, 11.211.1, 11.2
Stellmittelactuating means
1212
Faserkanalfiber channel
1313
Fasernfibers
1414
Vliesfleece
15.1, 15.215.1, 15.2
Halteelementretaining element
1616
Saugöffnungsuction opening
17.1, 17.217.1, 17.2
AbdeckblechCover plate
1818
Saugspaltsuction gap
1919
Abstandshalterspacer

Claims (12)

  1. Device for depositing synthetic fibers (13) to form a non-woven (14), said device comprising a take-off nozzle (1), through which the fibers (13) are conveyed by means of an air stream, with a depositing belt (3), exhaust equipment (4), assigned to the depositing belt (3) and with a guide duct (2) disposed between the take-off nozzle (1) and the depositing belt (3), the guide duct (2) comprising a movable maintained retaining flap (5.2) at least on that end of a longitudinal side that faces the depositing belt (3), which mobile retaining flap (5.2) can be adjusted for depositing the fibers (13), said device being characterized in that the retaining flap (5.2) is formed by a support (6.2) and an elastic sealing lip (7.2), which is held in frictional contact with the depositing belt (3).
  2. Device according to claim 1, characterized in that the guide duct (2) comprises on its opposite longitudinal side a second movably maintained retaining flap (5.1), which is formed by a second support (6.1) and a second elastic sealing lip (7.1), which is held in frictional contact with the non-woven (14) deposited on the depositing belt (3) during operation.
  3. Device according to claim 1 or 2, characterized in that the sealing lips (7.1, 7.2) are connected replaceable to the supports (6.1, 6.2).
  4. Device according to one of the claims 1 to 3, characterized in that the sealing lips (7.1, 7.2) are each formed by a thin steel sheet.
  5. Device according to one of the claims 1 to 4, characterized in that the sealing lips (7.1, 7.2) have wear protection at least in the area of contact.
  6. Device according to one of the claims 1 to 5, characterized in that the supports (6.1, 6.2) are pivoted and that an actuator (11.1, 11.2) is assigned to each of the supports (6.1, 6.2), by means of which actuators it is possible to change and adjust an angle of incidence formed between the depositing belt (3) and the sealing lip (7.1, 7.2).
  7. Device according to one of the claims 1 to 6, characterized in that the guide duct (2) is held by means of a bracket (9) below the take-off nozzle (1), the holding elements (15.1, 15.2) located opposite to one another in the longitudinal sides enabling a displacement and adjustment of the assigned duct elements (5.1, 5.2).
  8. Device according to one of the preceding claims, characterized in that below the depositing belt (3) an adjustable suction opening (16) is designed, by means of which the exhaust equipment (4) is connected to the lower side of the depositing belt (3).
  9. Device according to claim 8, characterized in that the suction opening (16) is formed between two cover sheets (17.1, 17.2), which are held such that they can be displaced relative to one another.
  10. Device according to claim 9, characterized in that a minimum suction slot (18) is formed and can be adjusted between the cover sheets (17.1, 17.2) and the depositing belt (3).
  11. Device according to claim 9 or 10, characterized in that between the dipositing belt (3) and the cover sheets (17.1, 17.2) a plurality of spacers (19) is inserted, which form the suction slot (18) and comprise a crescent shaped cross-section.
  12. Device according to one of the claims 1 to 11, characterized in that a depositing height can be changed and adjusted between the take-off nozzle (1) and the depositing belt (3).
EP05797780A 2004-09-24 2005-09-23 Device for stacking synthetic fibres to form a nonwoven Active EP1797230B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004046309 2004-09-24
PCT/EP2005/010308 WO2006032517A1 (en) 2004-09-24 2005-09-23 Device for stacking synthetic fibres to form a nonwoven

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EP1797230A1 EP1797230A1 (en) 2007-06-20
EP1797230B1 true EP1797230B1 (en) 2009-03-04

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EP (1) EP1797230B1 (en)
CN (1) CN101027442B (en)
DE (1) DE502005006763D1 (en)
WO (1) WO2006032517A1 (en)

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CN102216501B (en) * 2008-11-13 2014-05-21 欧瑞康纺织有限及两合公司 Apparatus for producing a spunbonded fabric
MX2013001672A (en) 2010-08-12 2013-06-07 Boma Engineerig Srl Process and apparatus for spinning fibres and in particular for producing a fibrous-containing nonwoven.
ES2645105T3 (en) * 2014-02-17 2017-12-04 Reifenhäuser GmbH & Co. KG Maschinenfabrik Continuous manufacturing installation of a spinning veil band
TR201808524T4 (en) 2014-04-07 2018-07-23 Boma Eng S P A Process and apparatus for producing fiber-containing and / or particle-containing nonwoven.
EP3346037B1 (en) * 2015-09-03 2020-04-08 Toray Industries, Inc. Spunbond nonwoven fabric manufacturing method and manufacturing device
KR102259649B1 (en) * 2016-03-30 2021-06-01 미쓰이 가가쿠 가부시키가이샤 Non-woven fabric manufacturing apparatus and non-woven fabric manufacturing method
EP3600876A4 (en) 2017-03-27 2021-04-21 Sellars Absorbent Materials, Inc. Absorbent laminated material
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DE4312419C2 (en) * 1993-04-16 1996-02-22 Reifenhaeuser Masch Plant for the production of a spunbonded nonwoven web from aerodynamically stretched plastic filaments
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ATE386831T1 (en) * 2002-02-28 2008-03-15 Reifenhaeuser Gmbh & Co Kg SYSTEM FOR THE CONTINUOUS PRODUCTION OF A SPUNNOVED WEB

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DE502005006763D1 (en) 2009-04-16
EP1797230A1 (en) 2007-06-20
WO2006032517A1 (en) 2006-03-30
US8137088B2 (en) 2012-03-20
CN101027442B (en) 2010-06-16
US20080317895A1 (en) 2008-12-25
CN101027442A (en) 2007-08-29

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