EP0899370A2 - Calender rolls for fleece - Google Patents

Calender rolls for fleece Download PDF

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Publication number
EP0899370A2
EP0899370A2 EP98110606A EP98110606A EP0899370A2 EP 0899370 A2 EP0899370 A2 EP 0899370A2 EP 98110606 A EP98110606 A EP 98110606A EP 98110606 A EP98110606 A EP 98110606A EP 0899370 A2 EP0899370 A2 EP 0899370A2
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EP
European Patent Office
Prior art keywords
conveyor belt
roller
calender
nonwoven
deflection
Prior art date
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Granted
Application number
EP98110606A
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German (de)
French (fr)
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EP0899370B1 (en
EP0899370A3 (en
Inventor
Siegfried Bernhardt
Heinz-Werner Naumann-Burghardt
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Spinnbau GmbH
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Spinnbau GmbH
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Publication of EP0899370A2 publication Critical patent/EP0899370A2/en
Publication of EP0899370A3 publication Critical patent/EP0899370A3/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
    • D06C15/02—Calendering, pressing, ironing, glossing or glazing textile fabrics between co-operating press or calender rolls

Definitions

  • the invention relates to a nonwoven calender according to the preamble of claim 1.
  • Such a fleece calender is known from DE 94 08 597 U known.
  • nonwovens are used high production output.
  • high production speeds exists especially with light fleeces the problem that the nonwoven web due to the high Speeds in their structure is changed so that the uniformity of the fleece is impaired.
  • Plants with production speeds of 150 m / min and more is the entry of the nonwoven web into the nip problematic because the structure of the nonwoven web alone due to the resulting air currents and from the Nonwoven web changed to displaced air or destroyed can be. This is usually done by increasing the speed of the subsequent installation and thus by default.
  • the invention is therefore based on the object Nonwoven calender to create that at significantly increased Maintaining a production speeds ensures high fleece uniformity.
  • the conveyor belt is permeable to air and in the area of the calender rolls Deflection rollers is deflected at least twice such that the nonwoven web in the conveyor belt section between two Deflection rolls are brought tangentially to one of the calender rolls is.
  • the invention makes it possible in an advantageous manner Way, the nonwoven web in front of the nip to a of the two calender rolls so that the nonwoven web permanently supported in the nip. Due to the constant management of the nonwoven web, this is due at no time in the area between the conveyor belt and Nip free. The carried along with the nonwoven web and in the air it contains does not suddenly appear in the nip squeezed out, but can over a longer stretch be pushed out continuously.
  • the fleece speed corresponds to the running-in speed into the calender, creating a warp-free transition reached by the conveyor belt in the fleece calender can be.
  • the tangent to the one calender roll Conveyor belt section is preferably vacuumed, so that on the one hand the nonwoven web before transfer to the calender roll is firmly held on the conveyor belt and at the same time excess air is removed from the nonwoven web.
  • the conveyor belt section between the deflecting rollers completely in line with the contour of the calender roll or partially curved.
  • the Nonwoven web to the calender roll under a given Transfer contact pressure.
  • the calender roll to which the nonwoven web is brought tangentially a larger one Has a diameter than the calender roll opposite it.
  • the use of a large calender roll is helpful, the deflection angle for the nonwoven web is too small hold.
  • a development of the invention provides that the Roll gap closer, second deflection roller of the conveyor belt section has a smaller diameter than that first deflection roller of the conveyor belt section.
  • the bigger one Diameter of the first deflecting roller leads to the fact that the nonwoven web is deflected more gently while the second Deflecting roller may have a smaller diameter can, because it no longer deflects the nonwoven web and because the nonwoven web has a smaller diameter this deflecting roller brought closer to the nip can be.
  • the angle of inclination of the tangential to a calender roll brought in conveyor belt section is relative to the horizontal approx. 30 - 50 °. This measure also serves to reduce the deflection angle for the nonwoven web.
  • first and / or second Deflection roller of the conveyor belt section from a screen roller consists.
  • screen rollers as deflection rollers prevents wedges of air between the deflecting roller and the conveyor belt that can form the nonwoven web structure could interfere on the conveyor belt.
  • the first deflecting roller of the conveyor belt section can as a screen roller at least in the deflection area of the conveyor belt are under vacuum so that the deflection of the Nonwoven web on the conveyor belt permanently under negative pressure can be done.
  • the second deflection roller of the conveyor belt section can also consist of a screen roller, at least can sometimes also be under positive pressure. To this This can detach the nonwoven web from the conveyor belt and support the transfer to the calender roll.
  • the Nonwoven web on the upper or middle calender roll be brought tangentially. If the nonwoven web to the the middle of the calender roll is the direction of rotation the calender rolls opposite and the nonwoven web is running in the lower nip between the middle and the lower calender roll.
  • a rotating perforated roller lie on it, which is transverse to extends the conveyor belt and the to compress the Nonwoven web serves.
  • the peripheral speed of the perforated roller corresponds to this preferably the fleece speed on the conveyor belt.
  • the perforated roller can also be vacuumed to remove the To facilitate air from the nonwoven web.
  • the perforated roller extends from one to the length of the perforated roller extending suction hood surrounding the predominant Encloses part of the peripheral surface of the perforated roller, and only leaves the contact area of the nonwoven web free. A perforated roller so sucked enables a particularly effective Compact the nonwoven web without air turbulence produce.
  • Fig. 1 shows schematically the inlet on a nonwoven calender with two calender rolls 4.6.
  • the calender rolls 4,6 are vertically superimposed and form between a nip 8.
  • a nonwoven web 12 is fed from a carding system to the clanding rollers 4, 6 via a circulating air-permeable conveyor belt 10.
  • the upper calender roll 4 has a larger diameter than the lower calender roll 6, which can be designed as an embossing roll.
  • the nonwoven web is fed at a high transport speed of approximately 150 m / min and more, even nonwovens with a weight per unit area of 12 g / m 2 Can have a thickness of up to approx. 6 mm.
  • nip 8 Since the nip 8 has only a fraction of the thickness of the nonwoven web in relation to the thickness of the nonwoven web, a large volume of air must be removed from the nonwoven web, particularly at the high transport speed, in order to avoid destruction of the nonwoven web structure when it enters the nonwoven calender.
  • the fleece web guide is designed so that the Conveyor belt 10 brought up to one of the calender rolls 4 is, the conveyor belt 10 using two Deflection rollers 14, 16 are deflected twice.
  • the between the two deflection rollers 14, 16 extending conveyor belt section 18 leads the nonwoven web 12 tangentially to the upper calender roll 4, whereby by vacuuming the Conveyor belt section 18 with the help of a suction box 24 the excess air prior to contact with the Calender roll 4 can be removed.
  • the second deflection roller 16 is the Most of the unwanted air comes out of the nonwoven web 12 removed so that they easily in the nip 8th can break in.
  • a slight nip between the deflecting roller 16 and the calender roll 4 can be adjusted.
  • another suction box 22 is in one Conveyor belt section 20 upstream of the first deflection roller 14, whereby on the one hand the liability of the nonwoven web 12 on the conveyor belt 10 in the run-up to the first deflection is increased and on the other hand already a part of the excess Air in the nonwoven web 12 is removed.
  • the first deflecting roller 14 can also be designed as a screen roller be and additionally at least in the area of the deflection of the Conveyor belt 10 are under negative pressure. To this Way, the entire lead-in area, starting before the first deflection until the transfer of the nonwoven web 12 to the Calender roll 4 for sucking off the excess air and to increase the adhesion of the nonwoven web 12 on the conveyor belt be used.
  • the second deflection roller 16 can also act as a screen roller be designed, the area behind the suction box 24 could be under pressure to detach the Support nonwoven web 12 from the conveyor belt 10.
  • the first deflection roller 14 can be compared to the second Deflection roller 16 have a considerably larger diameter, to be larger at the high belt speed To provide deflection radius.
  • the conveyor belt section 18 can also under a defined Contact pressure pressed against the calender roll 4 to be removing the excess in this way To support air.
  • Fig. 2 shows another embodiment of a nonwoven calender with three calender rolls 4,5,6.
  • the calender rolls 4,5,6 are arranged vertically one above the other, the middle calender roll 6 has a smaller diameter than the other calender rolls 4.5.
  • Fig. 2 shows two alternative ways for that Bring the conveyor belt 10 to the calender rolls 4,5,6.
  • the nonwoven web 12 becomes tangential to the calender roll 6 brought up, the conveyor belt 10 under an angle of inclination to the horizontal of approx. 10 to 20 ° can run.
  • the direction of rotation of the calender rolls 4,5,6 is opposite to the previously explained alternative, in which the nonwoven web 12 is fed to the nip 8. In this way, the nonwoven web 12 is in the nip 9 out between the calender rolls 4 and 6.
  • FIGS. 1 and 2 can be in Area of the conveyor belt section 20 or as in Fig. 2, a perforated roller in front of this transport section 25 may be arranged on the conveyor belt overlying nonwoven web 12 is compacted by the portion that is also transported To reduce air in the nonwoven web 12.
  • the perforated roller 25 is preferably provided with a suction hood 26 surrounded, which sucks the perforated roller 25 circumferentially.
  • the sealing of the hood 26 against the perforated roller 25 in the transverse direction to the conveyor belt 10 can be done with the help of sealing lips.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The calender assembly, for carded webs, has a conveyor belt (10) which is permeable to air. At the calender rollers (4-6), the belt (10) passes round deflection rollers (14,16) to form a section (18) of the belt path between them at a tangent to the calender rollers (4-6), with at least a double belt path deflection. The speed of web (12) travel on the conveyor belt (10) is equal to the take-in speed at the gap (8) between the calender rollers (4-6). The leading section of the conveyor belt is subjected to suction where it passes between the deflection rollers (14,16) on a path matching the calender roller curvature, and the belt section (20) in front of the deflection roller (14) is under suction. The calender roller (4) which takes in the carded web (12) has a larger dia. than its facing roller (6). The second belt deflection roller (16), in the direction of belt (10) movement, has a smaller dia. than the preceding deflection roller (14). Between the deflection rollers (14,16), the path of the conveyor belt (10) is pitched downwards at an angle of 30-50 degrees to the horizontal. The first and/or second belt deflection roller (14,16) is a mesh roller, with an inner underpressure. The second mesh deflection roller (16) can be at least partially with an inner overpressure. The three calender rollers (4-6) are in a vertical stack, with the end section of the conveyor belt (10) directed at a tangent to the upper roller (4) or the center roller (6). A lateral perforated roller (25) compresses the carded web (12) on the conveyor belt (10), rotating at a speed matching the speed of belt travel. The perforated roller (25) is under suction, and has a suction hood (26) shrouding it apart from the roller surface in contact with the carded web (12).

Description

Die Erfindung betrifft einen Vlieskalander nach dem Oberbegriff des Anspruchs 1.The invention relates to a nonwoven calender according to the preamble of claim 1.

Ein derartiger Vlieskalander ist aus der DE 94 08 597 U bekannt. Mit derartigen Anlagen werden Vliesbahnen mit hoher Produktionsleistung hergestellt. Bei hohen Produktionsgeschwindigkeiten besteht insbesondere bei Leichtvliesen das Problem, daß die Vliesbahn aufgrund der hohen Geschwindigkeiten in ihrer Struktur verändert wird, so daß die Gleichmäßigkeit des Vlieses beeinträchtigt wird. Bei Anlagen mit Produktionsgeschwindigkeiten von 150 m/min und mehr ist der Einlauf der Vliesbahn in den Walzenspalt problematisch, weil die Struktur der Vliesbahn allein aufgrund der entstehenden Luftströmungen und der aus der Vliesbahn zu verdrängenden Luft verändert oder zerstört werden kann. Dieses geschieht in der Regel durch Erhöhung der Geschwindigkeit der nachfolgenden Einrichtung und somit durch Verzug.Such a fleece calender is known from DE 94 08 597 U known. With such systems, nonwovens are used high production output. At high production speeds exists especially with light fleeces the problem that the nonwoven web due to the high Speeds in their structure is changed so that the uniformity of the fleece is impaired. At Plants with production speeds of 150 m / min and more is the entry of the nonwoven web into the nip problematic because the structure of the nonwoven web alone due to the resulting air currents and from the Nonwoven web changed to displaced air or destroyed can be. This is usually done by increasing the speed of the subsequent installation and thus by default.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Vlieskalander zu schaffen, der bei erheblich gesteigerten Produktionsgeschwindigkeiten die Aufrechterhaltung einer hohen Vliesgleichmäßigkeit gewährleistet.The invention is therefore based on the object Nonwoven calender to create that at significantly increased Maintaining a production speeds ensures high fleece uniformity.

Zur Lösung dieser Aufgabe dienen die Merkmale des Anspruchs 1.The features of the claim serve to solve this problem 1.

Erfindungsgemäß ist vorgesehen, daß das Transportband luftdurchlässig ist und im Bereich der Kalanderwalzen über Umlenkwalzen mindestens zweifach derart umgelenkt ist, daß die Vliesbahn in dem Transportbandabschnitt zwischen zwei Umlenkwalzen an eine der Kalanderwalzen tangential herangeführt ist. Die Erfindung ermöglicht es in vorteilhafter Weise, die Vliesbahn bereits vor dem Walzenspalt an eine der beiden Kalanderwalzen zu übergeben, so daß die Vliesbahn permanent gestützt in den Walzenspalt einlaufen kann. Durch die ständige Führung der Vliesbahn liegt diese zu keinem Zeitpunkt in dem Bereich zwischen Transportband und Walzenspalt frei. Die mit der Vliesbahn mitgeführte und in ihr enthaltene Luft wird nicht plötzlich im Walzenspalt herausgequetscht, sondern kann über einen längeren Streckenabschnitt kontinuierlich herausgedrückt werden.According to the invention it is provided that the conveyor belt is permeable to air and in the area of the calender rolls Deflection rollers is deflected at least twice such that the nonwoven web in the conveyor belt section between two Deflection rolls are brought tangentially to one of the calender rolls is. The invention makes it possible in an advantageous manner Way, the nonwoven web in front of the nip to a of the two calender rolls so that the nonwoven web permanently supported in the nip. Due to the constant management of the nonwoven web, this is due at no time in the area between the conveyor belt and Nip free. The carried along with the nonwoven web and in the air it contains does not suddenly appear in the nip squeezed out, but can over a longer stretch be pushed out continuously.

Die Vliesgeschwindigkeit entspricht der Einlaufgeschwindigkeit in den Kalander, wodurch ein verzugsfreier Übergang von dem Transportband in den Vlieskalander erreicht werden kann.The fleece speed corresponds to the running-in speed into the calender, creating a warp-free transition reached by the conveyor belt in the fleece calender can be.

Der sich tangential an die eine Kalanderwalze annähernde Transportbandabschnitt ist vorzugsweise besaugt, so daß einerseits die Vliesbahn vor der Übergabe an die Kalanderwalze fest auf dem Transportband gehalten wird und gleichzeitig überschüssige Luft aus der Vliesbahn entfernt wird. The tangent to the one calender roll Conveyor belt section is preferably vacuumed, so that on the one hand the nonwoven web before transfer to the calender roll is firmly held on the conveyor belt and at the same time excess air is removed from the nonwoven web.

Zusätzlich kann vorgesehen sein, daß vor jeder Umlenkwalze ein Transportbandabschnitt besaugt ist. Auf diese Weise ist die Haftung der Vliesbahn auf dem Transportband an den Umlenkstellen erhöht, um bei hohen Produktionsgeschwindigkeiten Fliehkräften entgegenzuwirken. Dadurch wird die Führung der Vliesbahn verbessert und gleichzeitig kann über einen verlängerten Streckenabschnitt des Transportbandes Luft aus der Vliesbahn entfernt werden.In addition, it can be provided that before each deflecting roller a conveyor belt section is vacuumed. In this way is the liability of the nonwoven web on the conveyor belt to the Deflection points increased to at high production speeds Counteracting centrifugal forces. This will make the Guidance of the nonwoven web improved and at the same time can over an extended section of the conveyor belt Air is removed from the nonwoven web.

Bei einem alternativen Ausführungsbeispiel kann vorgesehen sein, daß der Tranportbandabschnitt zwischen den Umlenkwalzen in Anpassung an die Kontur der Kalanderwalze ganz oder teilweise gekrümmt verläuft. In diesem Fall wird die Vliesbahn an die Kalanderwalze unter einem vorgegebenen Anpreßdruck übergeben.In an alternative embodiment, can be provided be that the conveyor belt section between the deflecting rollers completely in line with the contour of the calender roll or partially curved. In this case the Nonwoven web to the calender roll under a given Transfer contact pressure.

Vorzugsweise ist vorgesehen, daß die Kalanderwalze, an die die Vliesbahn tangential herangeführt ist, einen größeren Durchmesser aufweist als die ihr gegenüberliegende Kalanderwalze. Die Verwendung einer großen Kalanderwalze ist behilflich, die Umlenkwinkel für die Vliesbahn gering zu halten.It is preferably provided that the calender roll to which the nonwoven web is brought tangentially, a larger one Has a diameter than the calender roll opposite it. The use of a large calender roll is helpful, the deflection angle for the nonwoven web is too small hold.

Eine Weiterbildung der Erfindung sieht vor, daß die dem Walzenspalt nähere, zweite Umlenkwalze des Transportbandabschnittes einen kleineren Durchmesser aufweist als die erste Umlenkwalze des Transportbandabschnittes. Der größere Durchmesser der ersten Umlenkwalze führt dazu, daß die Vliesbahn sanfter umgelenkt wird, während die zweite Umlenkwalze durchaus einen kleineren Durchmesser aufweisen kann, weil die Vliesbahn von ihr nicht mehr umgelenkt wird und weil die Vliesbahn bei einem kleineren Durchmesser dieser Umlenkwalze näher an den Walzenspalt herangeführt werden kann. A development of the invention provides that the Roll gap closer, second deflection roller of the conveyor belt section has a smaller diameter than that first deflection roller of the conveyor belt section. The bigger one Diameter of the first deflecting roller leads to the fact that the nonwoven web is deflected more gently while the second Deflecting roller may have a smaller diameter can, because it no longer deflects the nonwoven web and because the nonwoven web has a smaller diameter this deflecting roller brought closer to the nip can be.

Der Neigungswinkel des tangential an eine Kalanderwalze herangeführten Transportbandabschnittes beträgt relativ zur Horizontalen ca. 30 - 50°. Auch diese Maßnahme dient dazu, den Umlenkwinkel für die Vliesbahn zu verringern.The angle of inclination of the tangential to a calender roll brought in conveyor belt section is relative to the horizontal approx. 30 - 50 °. This measure also serves to reduce the deflection angle for the nonwoven web.

Es kann vorgesehen sein, daß die erste und/oder zweite Umlenkwalze des Transportbandabschnittes aus einer Siebwalze besteht. Die Verwendung von Siebwalzen als Umlenkwalzen verhindert, daß sich Luftkeile zwischen der Umlenkwalze und dem Transportband bilden können, die die Vliesbahnstruktur auf dem Transportband stören könnten.It can be provided that the first and / or second Deflection roller of the conveyor belt section from a screen roller consists. The use of screen rollers as deflection rollers prevents wedges of air between the deflecting roller and the conveyor belt that can form the nonwoven web structure could interfere on the conveyor belt.

Die erste Umlenkwalze des Transportbandabschnittes kann als Siebwalze zumindest im Umlenkbereich des Transportbandes unter Unterdruck stehen, so daß die Umlenkung der Vliesbahn auf dem Transportband permanent unter Unterdruck erfolgen kann.The first deflecting roller of the conveyor belt section can as a screen roller at least in the deflection area of the conveyor belt are under vacuum so that the deflection of the Nonwoven web on the conveyor belt permanently under negative pressure can be done.

Die zweite Umlenkwalze des Transportbandabschnittes kann ebenfalls aus einer Siebwalze bestehen, die zumindest teilweise ggf. auch unter Überdruck stehen kann. Auf diese Weise kann das Ablösen der Vliesbahn von dem Transportband und das Übertragen auf die Kalanderwalze unterstützt werden.The second deflection roller of the conveyor belt section can also consist of a screen roller, at least can sometimes also be under positive pressure. To this This can detach the nonwoven web from the conveyor belt and support the transfer to the calender roll.

Bei einem Vlieskalander mit drei Kalanderwalzen kann die Vliesbahn an die obere oder an die mittlere Kalanderwalze tangential herangeführt sein. Wird die Vliesbahn an die mittlere Kalanderwalze herangeführt, ist die Drehrichtung der Kalanderwalzen entgegengesetzt und die Vliesbahn läuft in den unteren Walzenspalt zwischen der mittleren und der unteren Kalanderwalze ein.With a non-woven calender with three calender rolls, the Nonwoven web on the upper or middle calender roll be brought tangentially. If the nonwoven web to the the middle of the calender roll is the direction of rotation the calender rolls opposite and the nonwoven web is running in the lower nip between the middle and the lower calender roll.

Vor dem Einlauf in den Walzenspalt kann auf der Vliesbahn eine sich drehende Lochwalze aufliegen, die sich quer zu dem Transportband erstreckt und die zum Verdichten der Vliesbahn dient.Before entering the nip, you can use the nonwoven web a rotating perforated roller lie on it, which is transverse to extends the conveyor belt and the to compress the Nonwoven web serves.

Die Umfangsgeschwindigkeit der Lochwalze entspricht dabei vorzugsweise der Vliesgeschwindigkeit auf dem Transportband.The peripheral speed of the perforated roller corresponds to this preferably the fleece speed on the conveyor belt.

Die Lochwalze kann auch besaugt sein, um das Entfernen der Luft aus der Vliesbahn zu erleichtern.The perforated roller can also be vacuumed to remove the To facilitate air from the nonwoven web.

Bei einem besonders bevorzugten Ausführungsbeispiel ist die Lochwalze von einer sich über die Länge der Lochwalze erstreckenden Absaughaube umgeben, die den überwiegenden Teil des Umfangsfläche der Lochwalze umschließt, und lediglich den Kontaktbereich der Vliesbahn freiläßt. Eine derart besaugte Lochwalze ermöglicht ein besonders effektives Verdichten der Vliesbahn, ohne Luftverwirbelungen zu erzeugen.In a particularly preferred embodiment the perforated roller extends from one to the length of the perforated roller extending suction hood surrounding the predominant Encloses part of the peripheral surface of the perforated roller, and only leaves the contact area of the nonwoven web free. A perforated roller so sucked enables a particularly effective Compact the nonwoven web without air turbulence produce.

Im folgenden werden unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert.The following are with reference to the drawings Embodiments of the invention explained in more detail.

Es zeigen:

Fig. 1
den Einlaufbereich an einem Vlieskalander, und
Fig. 2
den Einlaufbereich an einem Vlieskalander mit drei Kalanderwalzen.
Show it:
Fig. 1
the inlet area on a fleece calender, and
Fig. 2
the inlet area on a fleece calender with three calender rolls.

Fig. 1 zeigt schematisch den Einlauf an einem Vlieskalander mit zwei Kalanderwalzen 4,6. Die Kalanderwalzen 4,6 sind vertikal übereinander gelagert und bilden zwischen sich einen Walzenspalt 8. Fig. 1 shows schematically the inlet on a nonwoven calender with two calender rolls 4.6. The calender rolls 4,6 are vertically superimposed and form between a nip 8.

Eine Vliesbahn 12 wird über ein umlaufendes luftdurchlässiges Transportband 10 von einer Krempelanlage den Klanderwalzen 4,6 zugeführt. Die obere Kalanderwalze 4 weist einen größeren Durchmesser auf als die untere, als Prägewalze ausführbare Kalanderwalze 6. Die Vliesbahn wird mit einer hohen Transportgeschwindigkeit von ca. 150 m/min und mehr herangeführt, wobei selbst Vliese mit einem Flächengewicht von 12 g/m2 eine Dicke von bis zu ca. 6 mm haben können. Da der Walzenspalt 8 im Verhältnis zur Dicke der Vliesbahn nur einen Bruchteil der Vliesbahndicke aufweist, muß aus der Vliesbahn, insbesondere bei der hohen Transportgeschwindigkeit, ein großes Luftvolumen abgeführt werden, um eine Zerstörung der Vliesbahnstruktur beim Einlauf in den Vlieskalander zu vermeiden.A nonwoven web 12 is fed from a carding system to the clanding rollers 4, 6 via a circulating air-permeable conveyor belt 10. The upper calender roll 4 has a larger diameter than the lower calender roll 6, which can be designed as an embossing roll. The nonwoven web is fed at a high transport speed of approximately 150 m / min and more, even nonwovens with a weight per unit area of 12 g / m 2 Can have a thickness of up to approx. 6 mm. Since the nip 8 has only a fraction of the thickness of the nonwoven web in relation to the thickness of the nonwoven web, a large volume of air must be removed from the nonwoven web, particularly at the high transport speed, in order to avoid destruction of the nonwoven web structure when it enters the nonwoven calender.

Insbesondere erscheint es wesentlich, den Streckenabschnitt des Transportbandes in dem die überschüssige Luft vor dem Walzenspalt 8 entfernt werden kann, zu vergrößern, um eine ausreichende Luftabfuhr zu gewährleisten.In particular, it appears essential, the route section of the conveyor belt in which the excess air before the nip 8 can be removed to enlarge, to ensure sufficient air removal.

Die Vliesbahnführung ist dabei so gestaltet, daß das Transportband 10 bis an eine der Kalanderwalzen 4 herangeführt wird, wobei das Transportband 10 mit Hilfe von zwei Umlenkwalzen 14,16 zweifach umgelenkt wird. Der zwischen den beiden Umlenkwalzen 14,16 verlaufende Transportbandabschnitt 18 führt die Vliesbahn 12 tangential an die obere Kalanderwalze 4 heran, wobei durch ein Besaugen des Transportbandabschnittes 18 mit Hilfe eines Absaugkastens 24 die überschüssige Luft im Vorfeld des Kontaktes mit der Kalanderwalze 4 entfernt werden kann. Nachdem die Vliesbahn 12 die zweite Umlenkwalze 16 passiert hat, ist die unerwünschte Luft weitestgehend bereits aus der Vliesbahn 12 entfernt, so daß diese problemlos in den Walzenspalt 8 einlaufen kann. Je nach Zustellung der Umlenkwalze 16 kann dabei ein leichter Klemmpunkt zwischen der Umlenkwalze 16 und der Kalanderwalze 4 eingestellt werden.The fleece web guide is designed so that the Conveyor belt 10 brought up to one of the calender rolls 4 is, the conveyor belt 10 using two Deflection rollers 14, 16 are deflected twice. The between the two deflection rollers 14, 16 extending conveyor belt section 18 leads the nonwoven web 12 tangentially to the upper calender roll 4, whereby by vacuuming the Conveyor belt section 18 with the help of a suction box 24 the excess air prior to contact with the Calender roll 4 can be removed. After the nonwoven web 12 has passed the second deflection roller 16 is the Most of the unwanted air comes out of the nonwoven web 12 removed so that they easily in the nip 8th can break in. Depending on the delivery of the deflection roller 16 can a slight nip between the deflecting roller 16 and the calender roll 4 can be adjusted.

Desweiteren ist ein weiterer Absaugkasten 22 in einem Transportbandabschnitt 20 der ersten Umlenkwalze 14 vorgelagert, wodurch einerseits die Haftung der Vliesbahn 12 auf dem Transportband 10 im Vorfeld der ersten Umlenkung erhöht wird und andererseits bereits ein Teil der überschüssigen Luft in der Vliesbahn 12 entfernt wird.Furthermore, another suction box 22 is in one Conveyor belt section 20 upstream of the first deflection roller 14, whereby on the one hand the liability of the nonwoven web 12 on the conveyor belt 10 in the run-up to the first deflection is increased and on the other hand already a part of the excess Air in the nonwoven web 12 is removed.

Die erste Umlenkwalze 14 kann auch als Siebwalze gestaltet sein und zusätzlich zumindest im Bereich der Umlenkung des Transportbandes 10 unter Unterdruck stehen. Auf diese Weise könnte der gesamte Einlaufbereich, beginnend vor der ersten Umlenkung, bis zur Übergabe der Vliesbahn 12 an die Kalanderwalze 4 zum Absaugen der überflüssigen Luft und zur Erhöhung der Haftung der Vliesbahn 12 auf dem Transportband verwendet werden.The first deflecting roller 14 can also be designed as a screen roller be and additionally at least in the area of the deflection of the Conveyor belt 10 are under negative pressure. To this Way, the entire lead-in area, starting before the first deflection until the transfer of the nonwoven web 12 to the Calender roll 4 for sucking off the excess air and to increase the adhesion of the nonwoven web 12 on the conveyor belt be used.

Die zweite Umlenkwalze 16 kann ebenfalls als Siebwalze gestaltet sein, wobei der Bereich hinter dem Absaugkasten 24 unter Überdruck stehen könnte, um das Ablösen der Vliesbahn 12 von dem Transportband 10 zu unterstützen.The second deflection roller 16 can also act as a screen roller be designed, the area behind the suction box 24 could be under pressure to detach the Support nonwoven web 12 from the conveyor belt 10.

Die erste Umlenkwalze 14 kann im Vergleich zur zweiten Umlenkwalze 16 einen erheblich größeren Durchmesser aufweisen, um bei der hohen Bandgeschwindigkeit einen größeren Umlenkradius vorzusehen.The first deflection roller 14 can be compared to the second Deflection roller 16 have a considerably larger diameter, to be larger at the high belt speed To provide deflection radius.

Der Transportbandabschnitt 18 kann auch unter einem definierten Anpreßdruck gegen die Kalanderwalze 4 gedrückt sein, um auf diese Weise das Entfernen der überschüssigen Luft zu unterstützen. The conveyor belt section 18 can also under a defined Contact pressure pressed against the calender roll 4 to be removing the excess in this way To support air.

Fig. 2 zeigt ein weiteres Ausführungsbeispiel eines Vlieskalanders mit drei Kalanderwalzen 4,5,6. Die Kalanderwalzen 4,5,6 sind vertikal übereinander angeordnet, wobei die mittlere Kalanderwalze 6 einen kleineren Durchmesser aufweist als die weiteren Kalanderwalzen 4,5.Fig. 2 shows another embodiment of a nonwoven calender with three calender rolls 4,5,6. The calender rolls 4,5,6 are arranged vertically one above the other, the middle calender roll 6 has a smaller diameter than the other calender rolls 4.5.

In der Fig. 2 ist zur Verfachung der Zeichnung kein Gehäuse dargestellt.In Fig. 2 there is no housing to simplify the drawing shown.

Die Fig. 2 zeigt zwei alternative Möglichkeiten, für das Heranführen des Transportbandes 10 an die Kalanderwalzen 4,5,6.Fig. 2 shows two alternative ways for that Bring the conveyor belt 10 to the calender rolls 4,5,6.

In der mit ausgezogenen Linien dargestellten Position des Transportbandes 10 entspricht die Drehrichtung der Walzen 4 und 6 dem Ausführungsbeispiel der Fig. 1. Die Vliesbahn 12 wird dabei in gleicher Weise wie in Fig. 1 dem Walzenspalt 8 zugeführt.In the position of the Conveyor belt 10 corresponds to the direction of rotation of the rollers 4 and 6 the embodiment of Fig. 1. The nonwoven web 12 becomes the nip in the same way as in FIG. 1 8 fed.

In der gestrichelten Darstellung des Transportbandes 10 wird die Vliesbahn 12 dagegen tangential an die Kalanderwalze 6 herangeführt, wobei das Transportband 10 unter einem Neigungswinkel zur Horizontalen von ca. 10 bis 20° verlaufen kann. Die Drehrichtung der Kalanderwalzen 4,5,6 ist entgegengesetzt zu der zuvor erläuterten Alternative, bei der die Vliesbahn 12 dem Walzenspalt 8 zugeführt wird. Auf diese Weise wird die Vliesbahn 12 in den Walzenspalt 9 zwischen die Kalanderwalzen 4 und 6 geführt.In the broken line of the conveyor belt 10 on the other hand, the nonwoven web 12 becomes tangential to the calender roll 6 brought up, the conveyor belt 10 under an angle of inclination to the horizontal of approx. 10 to 20 ° can run. The direction of rotation of the calender rolls 4,5,6 is opposite to the previously explained alternative, in which the nonwoven web 12 is fed to the nip 8. In this way, the nonwoven web 12 is in the nip 9 out between the calender rolls 4 and 6.

Bei den Ausführungsbeispielen der Fign. 1 und 2 kann im Bereich des Transportbandabschnittes 20 oder wie in Fig. 2 dargestellt, vor diesem Transportabschnitt eine Lochwalze 25 angeordnet sein, die die auf dem Transportband aufliegende Vliesbahn 12 verdichtet, um den Anteil mittransportierter Luft in der Vliesbahn 12 zu reduzieren. Vorzugsweise ist die Lochwalze 25 mit einer Absaughaube 26 umgeben, die die Lochwalze 25 umfangsmäßig absaugt. Dabei ist lediglich der Kontaktbereich mit der Vliesbahn 12 von der Haube 26 nicht erfaßt. Die Abdichtung der Haube 26 gegen die Lochwalze 25 in Querrichtung zu dem Transportband 10 kann dabei mit Hilfe von Dichtlippen erfolgen.In the embodiments of FIGS. 1 and 2 can be in Area of the conveyor belt section 20 or as in Fig. 2, a perforated roller in front of this transport section 25 may be arranged on the conveyor belt overlying nonwoven web 12 is compacted by the portion that is also transported To reduce air in the nonwoven web 12. The perforated roller 25 is preferably provided with a suction hood 26 surrounded, which sucks the perforated roller 25 circumferentially. Here is only the contact area with the nonwoven web 12 of the hood 26 is not detected. The sealing of the hood 26 against the perforated roller 25 in the transverse direction to the conveyor belt 10 can be done with the help of sealing lips.

Claims (17)

Vlieskalander mit mindestens zwei übereinander angeordneten Kalanderwalzen (4,5,6), die einen Walzenspalt (8) bilden, mit einem endlos umlaufenden Transportband (10), auf dem eine aus mindestens einem Flor bestehende Vliesbahn (12) dem Walzenspalt (8,9) zuführbar ist,
dadurch gekennzeichnet, daß das Transportband (10) luftdurchlässig ist, und im Bereich der Kalanderwalzen (4,5,6) über Umlenkwalzen (14,16) unter Bildung eines Transportbandabschnittes (18), der zwischen den Umlenkwalzen (14,16) an eine der Kalanderwalzen (4,5,6) tangential herangeführt ist, mindestens zweifach umgelenkt ist. Fleece calender with at least two calender rolls (4, 5, 6) arranged one above the other, which form a roll gap (8), with an endless conveyor belt (10) on which a fleece web (12) consisting of at least one pile passes the roll gap (8,9 ) can be fed,
characterized, that the conveyor belt (10) is permeable to air, and in the area of the calender rollers (4,5,6) via deflection rollers (14,16) to form a conveyor belt section (18) which is connected between the deflection rollers (14,16) to one of the calender rollers ( 4,5,6) is brought tangentially, is deflected at least twice. Vlieskalander nach Anspruch 1, dadurch gekennzeichnet, daß die Vliesgeschwindigkeit der Vliesbahn (12) auf dem Transportband (10) gleich der Einzugsgeschwindigkeit der Kalanderwalzen (4,5,6) im Walzenspalt (8) ist.Nonwoven calender according to claim 1, characterized in that the fleece speed of the fleece web (12) on the conveyor belt (10) equal to the feed speed the calender rolls (4,5,6) in the nip (8) is. Vlieskalander nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der erste Transportbandabschnitt (18) besaugt ist.Nonwoven calender according to claim 1 or 2, characterized in that the first conveyor belt section (18) is sucked. Vlieskalander nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß vor jeder Umlenkwalze (14) ein Transportbandabschnitt (20) besaugt ist.Nonwoven calender according to one of claims 1 to 3, characterized characterized in that in front of each deflecting roller (14) a conveyor belt section (20) is vacuumed. Vlieskalander nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß der Transportbandabschnitt (18) zwischen der Umlenkwalze in Anpassung an die Kontur der Kalanderwalze (4) ganz oder teilweise gekrümmt verläuft.Nonwoven calender according to claim 1 to 4, characterized in that the conveyor belt section (18) between the deflection roller in adaptation to the contour of the Calender roller (4) runs completely or partially curved. Vlieskalander nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die die Vliesbahn (12) übernehmende Kalanderwalze (4) einen größeren Durchmesser als die ihr gegenüberliegende Kalanderwalze (6) aufweist.Nonwoven calender according to one of claims 1 to 5, characterized characterized in that the nonwoven web (12) adopting calender roll (4) a larger diameter than the calender roll opposite it (6). Vlieskalander nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die in Transportrichtung des Transportbandes (10) zweite Umlenkwalze (16) des Transportbandabschnittes (18) einen kleineren Durchmesser aufweist als die erste Umlenkwalze (14).Nonwoven calender according to one of claims 1 to 6, characterized characterized in that in the direction of transport of the conveyor belt (10) second deflection roller (16) of the Conveyor belt section (18) a smaller diameter has as the first deflecting roller (14). Vlieskalander nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Neigungswinkel des tangential an die eine Kalanderwalze (4) herangeführten Transportbandabschnittes (18) relativ zur Horizontalen ca. 30 bis 50° beträgt.Nonwoven calender according to one of claims 1 to 7, characterized in that the angle of inclination of the tangentially brought up to a calender roll (4) Conveyor belt section (18) relative to the horizontal is approximately 30 to 50 °. Vlieskalander nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die erste und/oder zweite Umlenkwalze (14,16) des Transportbandabschnittes (18) aus einer Siebwalze besteht.Nonwoven calender according to one of claims 1 to 8, characterized characterized in that the first and / or second Deflection roller (14, 16) of the conveyor belt section (18) consists of a screen roller. Vlieskalander nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die erste Umlenkwalze (14) des Transportbandabschnittes (18) aus einer Siebwalze besteht, die zumindest im Umlenkbereich des Transportbandes (10) unter Unterdruck steht.Nonwoven calender according to one of claims 1 to 9, characterized characterized in that the first deflecting roller (14) of the conveyor belt section (18) from a screen roller exists, at least in the deflection area of the conveyor belt (10) is under vacuum. Vlieskalander nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die zweite Umlenkwalze (16) des Transportbandabschnittes (18) aus einer Siebwalze besteht, die zumindest teilweise unter Überdruck steht.Nonwoven calender according to one of claims 1 to 10, characterized characterized in that the second deflecting roller (16) of the conveyor belt section (18) from a screen roller exists, which is at least partially under pressure stands. Vlieskalander nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß drei Kalanderwalzen (4,5,6) übereinander angeordnet sind und daß der Transportbandabschnitt (18) an die obere Kalanderwalze (4) tangential herangeführt ist.Nonwoven calender according to one of claims 1 to 11, characterized in that three calender rolls (4,5,6) are arranged one above the other and that the Conveyor belt section (18) to the upper calender roll (4) is brought tangentially. Vlieskalander nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß drei Kalanderwalzen (4,5,6) übereinander angeordnet sind und daß der Transportbandabschnitt (18) an die mittlere Kalanderwalze (6) tangential herangeführt ist.Nonwoven calender according to one of claims 1 to 11, characterized in that three calender rolls (4,5,6) are arranged one above the other and that the Conveyor belt section (18) to the middle calender roll (6) is brought tangentially. Vlieskalander nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß auf der auf dem Transportband (10) aufliegenden Vliesbahn (12) eine quer zum Transportband (10) verlaufende drehbare Lochwalze (25) zum Verdichten der Vliesbahn (12) einwirkt.Nonwoven calender according to one of claims 1 to 13, characterized in that on the conveyor belt (10) a nonwoven web (12) lying across rotatable perforated roller running to the conveyor belt (10) (25) acts to compact the nonwoven web (12). Vlieskalander nach Anspruch 14, dadurch gekennzeichnet, daß die Umfangsgeschwindigkeit der Lochwalze (25) gleich der Vliesgeschwindigkeit auf dem Transportband (10) ist.Nonwoven calender according to claim 14, characterized in that the peripheral speed of the perforated roller (25) equal to the fleece speed on the conveyor belt (10) is. Vlieskalander nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß die Lochwalze (25) besaugt ist.Nonwoven calender according to claim 14 or 15, characterized characterized in that the perforated roller (25) is vacuumed. Vlieskalander nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, daß die Lochwalze (25) eine Absaughaube (26) aufweist, die die Lochwalze (25) umfangsmäßig außer im Kontaktbereich der Lochwalze (25) mit der Vliesbahn (12) umschließt.Nonwoven calender according to one of claims 14 to 16, characterized in that the perforated roller (25) a Has suction hood (26), the perforated roller (25) circumferentially except in the contact area of the perforated roller (25) with the nonwoven web (12).
EP98110606A 1997-08-28 1998-06-10 Calender rolls for fleece Expired - Lifetime EP0899370B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19737514 1997-08-28
DE19737514A DE19737514C2 (en) 1997-08-28 1997-08-28 Fleece calender

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EP0899370A3 EP0899370A3 (en) 1999-09-08
EP0899370B1 EP0899370B1 (en) 2003-09-24

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
EP1223135A1 (en) * 2001-01-16 2002-07-17 Fleissner GmbH & Co. Maschinenfabrik Method and device for transporting a nonwoven between two rolls with a distance therebetween
EP1225264A1 (en) * 2001-01-19 2002-07-24 F.O.R. ING. GRAZIANO S.p.A. Apparatus for the production of non-woven fabric thermally bonded by calendering
WO2006048437A2 (en) * 2004-11-05 2006-05-11 Concert Gmbh Roll arrangement for producing fleece
EP2085504A1 (en) * 2008-02-04 2009-08-05 ALBIS Spa Suction apparatus for transferring a nonwoven web
CN100545335C (en) * 2004-11-05 2009-09-30 康瑟特有限公司 The roller that is used for the producd fibers net is arranged
CN102433792A (en) * 2011-10-25 2012-05-02 天津科技大学 Draper-type calender heat-insulation shield
CN115012156A (en) * 2021-03-04 2022-09-06 昆山中天纺织有限公司 Fabric calender capable of adjusting pressure

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DE3414381A1 (en) * 1984-04-16 1985-10-17 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Device for transferring a fleece from a fleece carrier into a press
US4809404A (en) * 1987-03-28 1989-03-07 Hergeth Hollingsworth Gmbh Apparatus for compacting a nonwoven fabric, etc.
DE9408597U1 (en) * 1994-05-25 1995-09-28 Kuesters Eduard Maschf Fleece calender
EP0733729A1 (en) * 1995-03-22 1996-09-25 A. Thibeau Et Cie (S.A.) Suction cylinder enabling the transfer of a fibre web between a transport belt and two calendering rolls

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE3414381A1 (en) * 1984-04-16 1985-10-17 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Device for transferring a fleece from a fleece carrier into a press
US4809404A (en) * 1987-03-28 1989-03-07 Hergeth Hollingsworth Gmbh Apparatus for compacting a nonwoven fabric, etc.
DE9408597U1 (en) * 1994-05-25 1995-09-28 Kuesters Eduard Maschf Fleece calender
EP0733729A1 (en) * 1995-03-22 1996-09-25 A. Thibeau Et Cie (S.A.) Suction cylinder enabling the transfer of a fibre web between a transport belt and two calendering rolls

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1223135A1 (en) * 2001-01-16 2002-07-17 Fleissner GmbH & Co. Maschinenfabrik Method and device for transporting a nonwoven between two rolls with a distance therebetween
US6820786B2 (en) 2001-01-16 2004-11-23 Fleissner Gmbh & Co Maschinenfabrik Method and device for transporting a nonwoven material between two separated rollers
EP1225264A1 (en) * 2001-01-19 2002-07-24 F.O.R. ING. GRAZIANO S.p.A. Apparatus for the production of non-woven fabric thermally bonded by calendering
WO2006048437A2 (en) * 2004-11-05 2006-05-11 Concert Gmbh Roll arrangement for producing fleece
WO2006048437A3 (en) * 2004-11-05 2006-09-21 Concert Gmbh Roll arrangement for producing fleece
CN100545335C (en) * 2004-11-05 2009-09-30 康瑟特有限公司 The roller that is used for the producd fibers net is arranged
US7690093B2 (en) 2004-11-05 2010-04-06 Concert Gmbh Roller arrangement for producing fleece
EP2085504A1 (en) * 2008-02-04 2009-08-05 ALBIS Spa Suction apparatus for transferring a nonwoven web
CN102433792A (en) * 2011-10-25 2012-05-02 天津科技大学 Draper-type calender heat-insulation shield
CN115012156A (en) * 2021-03-04 2022-09-06 昆山中天纺织有限公司 Fabric calender capable of adjusting pressure

Also Published As

Publication number Publication date
EP0899370B1 (en) 2003-09-24
DE19737514A1 (en) 1999-03-04
EP0899370A3 (en) 1999-09-08
DE19737514C2 (en) 2000-05-11
DE59809701D1 (en) 2003-10-30

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