EP2479330B1 - Fibrous web laying device - Google Patents

Fibrous web laying device Download PDF

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Publication number
EP2479330B1
EP2479330B1 EP11151390.9A EP11151390A EP2479330B1 EP 2479330 B1 EP2479330 B1 EP 2479330B1 EP 11151390 A EP11151390 A EP 11151390A EP 2479330 B1 EP2479330 B1 EP 2479330B1
Authority
EP
European Patent Office
Prior art keywords
card web
contact pressure
web
card
carriage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11151390.9A
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German (de)
French (fr)
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EP2479330A1 (en
Inventor
Johann Philipp Dilo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oskar Dilo Maschinenfabrik KG
Original Assignee
Oskar Dilo Maschinenfabrik KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oskar Dilo Maschinenfabrik KG filed Critical Oskar Dilo Maschinenfabrik KG
Priority to EP11151390.9A priority Critical patent/EP2479330B1/en
Priority to CN201210012966.8A priority patent/CN102605485B/en
Priority to US13/353,679 priority patent/US8458999B2/en
Publication of EP2479330A1 publication Critical patent/EP2479330A1/en
Application granted granted Critical
Publication of EP2479330B1 publication Critical patent/EP2479330B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above

Definitions

  • the present invention relates to a nonwoven layer for laying a nonwoven fabric from a card web.
  • Nonwovens serve to deposit the card web produced by a carding machine as evenly as possible on a delivery conveyor belt in multilayered layers to form a nonwoven.
  • the card web is usually first passed through a superstructure and from there to a laying carriage, through the Ablegespalt the card web is placed on the delivery conveyor belt.
  • At least two pile conveyor belts serve to guide the card web through the nonwoven layer. The movements of the pile conveyor belts, the superstructure and the laying carriage are controlled in a coordinated manner.
  • EP 1 816 243 A1 describes a generic fleece layer.
  • Fleece layerers are often preceded by means for changing the pile speed, which are used primarily to control the pile density of the pile sheet in order to be able to produce a profiling of the laid nonwoven fabric or to perform an edge thickness compensation of the laid nonwoven web.
  • Such means for changing the Florlauf für include, for example, different speed driven driven rollers on the carding machine upstream carding, as for example WO 99/24650 A1 is known, or the provision of a separate drafting between carding and nonwoven, see for example EP 1 532 302 B1 ,
  • WO 2010/073221 A2 describes a pile store, in which the pile is sandwiched between two moving pile conveyor belts.
  • a vertically adjustable pressure roller presses the overhead pile conveyor belt on the underlying pile conveyor belt and is thus responsible for the size adjustment of the storage tank.
  • the present invention has for its object to provide a nonwoven fabric, which has an integrated pile memory, which provides in a simple manner compensation fluctuating Floreinlauf füren already before the entry of the card web in the superstructure of the web laying.
  • the nonwoven laying for laying a fleece from a card web on a transversely movable superstructure through which the card web is guided, also a transversely movable carriage, through which the coming from the superstructure card is guided and the delivery of the card web on a delivery conveyor belt serves.
  • the nonwoven depositor has at least two pile conveyor belts for guiding the pile web to the uppercarriage and further to the laying carriage, wherein the upper run of a first rotating rough pile conveyor belt extends from an inlet region of the web laying machine to the uppercarriage.
  • a positionally variable pressure means is provided, which is operable to produce a variable pile storage in the upper run of the first Flortransportbandes.
  • an integrated buffer is provided in a nonwoven, which does not require additional control of the superstructure and easily compensates for fluctuating Floreinlauf füren during operation of the web laying on the card web before the card web enters the superstructure.
  • the pressing means is a pressure roller, which is preferably vertically adjustable.
  • the formation and control of a variable memory storage can be done only by movement of a single element.
  • a smooth cover tape is arranged between the upper run of the first pile conveyor belt and the pressure roller, while the first pile conveyor belt is rough. In this way, it is ensured that the card web is merely advanced due to friction through the first pile conveyor belt while sliding along the smooth cover tape. At the same time a decoupling of the pressure roller is achieved by the card web through the intermediate masking tape.
  • the pressing means is a sword.
  • the sword has a smooth surface while the first pile conveyor belt is rough.
  • the card web can in turn be moved forward due to friction of the first Flortransportband and slide along the sword in this area.
  • the pressure roller is preferably movable so that it presses from above on the cover and thus also the upper run of the first pile conveyor belt. It is advantageous if the pressure roller presses on an oblique inlet portion of the cover strip and the first Flortransportbandes. Such a solution for the formation of the storage memory is mechanically preferred.
  • two deflecting rollers of the first pile conveyor belt form lateral boundaries of the pile store and thereby serve as clamping aids in the formation of the pile store initiated by the pressure roll. This allows a defined change in the size of the memory without the use of additional resources.
  • the sword is obliquely displaceable and is surrounded at least in a partial section of the first pile conveyor belt in forming the variable pile memory.
  • the first pile conveyor belt preferably runs along a first side surface of the sword, then over the blunt, relatively broad tip of the sword and then along the second side surface of the sword. In this way, can be extended or shortened around the sword only by shifting the sword of the existing from the beginning loop-shaped course of the card.
  • two deflection rollers of the first pile conveyor belt form lateral boundaries of the pile store and serve as clamping aids in the formation of the pile store initiated by the sword.
  • a moveable tensioning carriage is preferably provided, through which the first pile conveyor belt runs.
  • This tensioning carriage can be controlled or regulated according to the required additional length of the first pile conveyor belt and thus provide a balance, so that the first pile conveyor belt remains unaffected in terms of its overall length.
  • Fig. 1 shows a schematic cross-sectional view of a nonwoven layer 2, to which the present invention can be applied.
  • the nonwoven layer 2 with an endless circulating delivery conveyor belt 4, which is intended, one from a card web 6 (see Fig. 2 ) Fleece laid in a direction perpendicular to the drawing plane transport direction. From guide devices of the delivery conveyor belt 4, an upper guide roller 8 is shown.
  • the card web 6 is for clarity only in Fig. 2 shown.
  • the delivery conveyor belt 4 is a laying carriage 10 on rails or tubes (not shown) moved back and forth.
  • two guide rollers 12 and 14 are freely rotatably mounted.
  • the first guide roller 12 is partially wrapped by a pile conveyor belt 16, hereinafter also called second pile conveyor belt 16.
  • the second pile conveyor belt 16 is fixedly secured at its first end 18 in the machine frame, not shown, of the webbing 2 and runs from there at a close distance above the delivery conveyor belt 4 to laying carriage 10, where it is deflected by 180 ° and then four stationary guide rollers 20, 22, 24, 26 is returned to the second guide roller 14 in the laying carriage.
  • the deflecting roller 14, which is also rotatably mounted in the laying carriage 10, is partially wrapped by the second web conveyor belt 16, so that the web conveyor belt 16 is deflected by 180 ° and from the lower exit region of the laying carriage 10 in dense distance above the delivery conveyor belt 4 runs until it is in turn connected at its second end 28 fixedly connected to the machine frame of the web layer 2.
  • a chain or a toothed belt is mounted, which runs for example via a drive gear connected to a motor and a deflection wheel (all elements not shown). With the aid of these drive devices, the laying carriage 10 can be moved back and forth across the delivery conveyor belt 4 transversely to its transport direction.
  • an upper carriage 30 transversely to the transport direction of the delivery conveyor belt 4 on rails or tubes (not shown) movably mounted.
  • the rails or tubes may be the same rails or tubes on which the laying carriage 10 is movably mounted.
  • the uppercarriage 30 has an upper deflecting roller 32 and a lower deflecting roller 34, which are laterally offset from one another.
  • About these two guide rollers 32, 34 runs another Flortransportband 36, which is subsequently called first Flortransportband 36.
  • the first pile conveyor belt 36 slopes inclined downwards.
  • the first Flortransportband 36 runs parallel to the right upper strand of the second Flortransportbandes 16.
  • the first Flortransportband 36 runs straight through the laying carriage 10 and is after the laying carriage 10 via a stationary mounted, motor-driven guide rollers 38 and from there via a guide roller 42 mounted in a tensioning carriage 40, in order to then run over a plurality of guide rollers 44, 46, 48, 50 fixedly mounted in the machine frame of the webbing 2 before it reaches the superstructure 30 again.
  • the superstructure 30 and the tensioning carriage 40 may be connected to each other via a chain or a toothed belt (not shown) which runs via a drive gearwheel (not shown) and a deflection wheel, which are mounted in the machine frame (not shown).
  • the clamping carriage 40 is also on rails or tubes (not shown) movably mounted. It may also be advantageous if the movements of superstructure 30 and clamping carriage 40 are decoupled from each other.
  • Fig. 1 One recognizes in Fig. 1 in that, during operation, the superstructure 30 and its associated tensioning carriage 40 execute a mutually opposite movement.
  • the tensioning carriage 40 serves to keep the loop length of the first pile conveyor belt 36 constant.
  • the movements of laying carriage 10 and superstructure 30 are coordinated so that when feeding the card web 6 at a uniform speed in the nonwoven 2 a controlled storage of the card web 6 without stretching or compression within the batt 2 on the delivery conveyor belt 4 can take place.
  • the superstructure 30 moves in each case in the same direction, on average only half as fast as the laying carriage 10. It is also taken into account that the laying carriage 10 has to be decelerated in the region of its movement reversal position to a standstill and accelerated again.
  • a gap is formed, which is referred to as a discharge gap.
  • both pile conveyor belts 16, 36 are driven so that they run at the same speed.
  • the card web 6 is supplied at a variable speed, for example because a cyclically operating drafting arrangement (not shown) is arranged in front of the nonwoven layer 2 which produces an alternating thickness in the card web 6 for the purpose of achieving a transverse profiling of the laid nonwoven fabric Buffer memory in the nonwoven layer 2 a Florbahnpuff ceremonies be made within the batt 2.
  • a cyclically operating drafting arrangement (not shown) is arranged in front of the nonwoven layer 2 which produces an alternating thickness in the card web 6 for the purpose of achieving a transverse profiling of the laid nonwoven fabric Buffer memory in the nonwoven layer 2 a Florbahnpuff ceremonies be made within the batt 2.
  • this variable pile memory is formed in the inlet region of the web layer 2 without requiring change in the control of the uppercarriage 30 and the laying carriage 10.
  • the fleece layer 2 for this purpose has a cover strip 52 which extends from an inlet region of the fleece layer 2 up to at least the superstructure 30.
  • the cover strip 52 in this case runs directly above an upper run 54 of the first pile transport belt 36, which serves as a support surface for the card web 6 in this area and is moved in the direction of the arrow A.
  • the card web 6 is thus enclosed between the upper run 54 of the first pile transport belt 36 and the cover 52.
  • the first Flortransportband 36 is formed rough, preferably as an air-permeable screen belt
  • the cover 52 is formed smooth and arranged substantially stationary in the nonwoven layer 2.
  • the cover strip 52 is preferably impermeable to air and formed, for example, from Teflon or PVC coated fabric.
  • first pile transport belt 36 is impermeable to air, e.g. has a cubed PVC surface while the stationary cover tape 52 has pores to allow air leakage without becoming rough. It is also conceivable for some applications that both the cover band 52 and the first pile transport belt 36 are impermeable to air.
  • the circulating first Flortransportband 36 moves due to frictional forces on the lying thereon card web 6, and the cover 52, which is not moved with the card web 6, serves as a stationary cover, thus preventing unwanted turbulence or blowing of fibers of the card web 6.
  • the card web 6 remains largely free of turbulence, which higher Florlauf Oberen can be realized.
  • the card web 6 is guided as a sandwich between the upper strand 54 of the first pile transport belt 36 and the cover 52, wherein it is moved only by the movement of the first Flortransportbandes 36 forward and the smooth cover belt 52 is not a hindrance to the movement of the card web 6 ,
  • the masking tape 52 does not necessarily cover the entire upper run 54 of the first pile transport belt 36, but preferably extends from the entrance area of the batt 2 through the uppercarriage 30.
  • the substantially stationary cover band 52 is preferably fixed at its two ends to the machine frame of the fleece layer 2.
  • the cover strip 52 then extends from a first attachment point 56 in the inlet region of the webbing 2 of the web of the first Flortransportbandes 36 to the superstructure 30, through the latter and from the superstructure 30 horizontally to the second attachment point 58 at the rear end of the web layer 2.
  • the cover band 52 is preferably mounted by means of stretchable means 60 in the machine frame of the web layer 2.
  • the expandable means 60 may comprise either springs or pneumatic cylinders or other suitable elements.
  • the fleece layer 2 also has a pressing means in its inlet area, in this case a vertically adjustable pressure roller 62.
  • the pressure roller 62 is positionally variable and preferably movable such that it presses from above onto the cover strip 52 and thus simultaneously onto the upper run 54 of the first pile transport belt 36. This movement can be assisted by a support roller 64, which is likewise arranged in the inlet region of the fleece layer 2 and presses on the cover strip 52 from above.
  • a support roller 64 which is likewise arranged in the inlet region of the fleece layer 2 and presses on the cover strip 52 from above.
  • the guide roller 48 in cooperation with the guide roller 46.
  • the extended path of the card web 6 then runs between the extended pressure roller 62 and the guide roller 48 substantially perpendicular, as shown in dashed lines of memory formation in Fig. 2 evident.
  • the pressure roller 62 presses on an oblique inlet section 66 of the cover strip 52 and thus also of the first pile transport belt 36.
  • the expandable means 60 are provided, by means of which the suspension of the cover strip 52 can be extended at its two ends.
  • the situation is different for the moving first pile conveyor belt 36.
  • the tensioning carriage 40 can be actuated correspondingly changed.
  • the tensioning carriage 40 can deliver additional length of the first pile conveyor belt 36 required by movement to the left in the pile store and at the same time leave the total length of the first pile conveyor belt 36 unchanged.
  • Fig. 3 is shown a possibility of guiding the cover strip 52 in the uppercar 30. Due to the back and forth of the upper carriage 30, the substantially stationary cover band 52 must experience a support both to the left and to the right, so that it can slide through the latter during the movement of the upper carriage 30 in a defined manner. For this purpose, one needs an additional guide element 68, in the illustrated example, a guide shoe, which must be as smooth as possible and the lower guide roller 34 of the upper carriage 30 is adjacent.
  • Fig. 4 an alternative possibility of guiding the cover band 52 in the uppercarriage 30 is shown.
  • the guide element 68 is designed as a co-moving with the superstructure 30 smooth roller, which is arranged above the lower guide roller 34 and the cover strip 52 is deflected.
  • an additional guide means 69 is provided for the guidance of the card web around the lower deflection roller 34, for example that EP 1 947 223 A1 known guiding means.
  • a total of two pile conveyor belts 16, 36 are contained in the fleece layer 2.
  • the invention can also be applied to other fleece layers with two pile conveyor belts, as well as to all other fleece layers, including those with three tapes.
  • An example of such a fleece layer with three pile conveyor belts is in Fig. 5 shown.
  • the illustrated nonwoven layer is the second pile conveyor belt 16 of the embodiment Fig. 1 replaced by a second pile conveyor belt 70 and a third pile conveyor belt 72, which are deflected in a common tensioning carriage 74.
  • the invention is also applicable to reverse web layers in which the uppercarriage 30 and the laying carriage 10 move in opposite directions, or to the low-arm leveler.
  • the positionally variable pressing means is designed as a displaceable sword 76.
  • the sword 76 is preferably oriented obliquely and extends between two guide rollers 47 and 48 of the first Flortransportbandes 36.
  • the sword 76 is provided with a smooth surface, so that the forward movement of the card web 6 is done exclusively by the first rough Flortransportband 36, while the card web along the smooth sword 76 slides along.
  • the sword 76 can be moved back and forth. For shifting all common to the expert drive means can be used.
  • the upper run 54 of the first pile conveyor belt 36 thus runs in the formed pile memory along a first side face 78 of the sword, after which it is guided over the tip 80 of the sword 76 and then along the second side face 82 of the sword 76.
  • the dimensions of the sword 76 are selectable depending on the application, but the tip 80 of the sword 76 should be relatively blunt and wide to allow easy sliding of the card web 6 over the tip 80.
  • the tip 80 could be modeled, for example, the shape of a semicircle.
  • the first side surface 78 and the second side surface 82 of the sword 76 are arranged parallel to each other.
  • the side surfaces 78, 82 of the sword 76 may also be curved and / or diverge from the tip 80 of the sword 76.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The fleece layer has a laying carriage that is movable back and forth in transverse directions. Two card web conveyor belts (36) are provided for guiding a card web (6) to an upper carriage. The card web is guided from upper carriage to laying carriage. An upper run (54) of endless card web conveyor belt is extended from an infeed area of main portion to upper carriage and is served as a support surface for card web. Positionally variable pressing unit is actuated to produce a variable card web buffer in the upper run of the card web conveyor belt.

Description

Die vorliegende Erfindung betrifft einen Vliesleger zum Legen eines Vlieses aus einer Florbahn.The present invention relates to a nonwoven layer for laying a nonwoven fabric from a card web.

Vliesleger dienen dazu, die von einer Krempel erzeugte Florbahn möglichst gleichmäßig auf einem Abliefertransportband in mehrlagigen Schichten zu einem Vlies abzulegen. Dabei wird die Florbahn üblicherweise zunächst durch einen Oberwagen und von dort zu einem Legewagen geführt, durch dessen Ablegespalt die Florbahn auf das Abliefertransportband abgelegt wird. Zur Führung der Florbahn durch den Vliesleger dienen mindestens zwei Flortransportbänder. Die Bewegungen der Flortransportbänder, des Oberwagens und des Legewagens werden aufeinander abgestimmt gesteuert. EP 1 816 243 A1 beschreibt einen gattungsgemäßen Vliesleger.Nonwovens serve to deposit the card web produced by a carding machine as evenly as possible on a delivery conveyor belt in multilayered layers to form a nonwoven. The card web is usually first passed through a superstructure and from there to a laying carriage, through the Ablegespalt the card web is placed on the delivery conveyor belt. At least two pile conveyor belts serve to guide the card web through the nonwoven layer. The movements of the pile conveyor belts, the superstructure and the laying carriage are controlled in a coordinated manner. EP 1 816 243 A1 describes a generic fleece layer.

Vlieslegern sind oftmals Einrichtungen zur Änderungen der Florlaufgeschwindigkeit vorgeschaltet, die in erster Linie dazu verwendet werden, die Flordichte der Florbahn zu regeln, um eine Profilierung des gelegten Vlieses erzeugen zu können bzw. um eine Randdickenkompensation der gelegten Vliesbahn durchzuführen. Derartige Einrichtungen zur Änderung der Florlaufgeschwindigkeit umfassen beispielsweise unterschiedlich schnell angetriebenen Abnehmerwalzen an der dem Vliesleger vorgeschalteten Krempel, wie es beispielsweise aus WO 99/24650 A1 bekannt ist, oder das Vorsehen eines gesonderten Streckwerks zwischen Krempel und Vliesleger, siehe beispielsweise EP 1 532 302 B1 .Fleece layerers are often preceded by means for changing the pile speed, which are used primarily to control the pile density of the pile sheet in order to be able to produce a profiling of the laid nonwoven fabric or to perform an edge thickness compensation of the laid nonwoven web. Such means for changing the Florlaufgeschwindigkeit include, for example, different speed driven driven rollers on the carding machine upstream carding, as for example WO 99/24650 A1 is known, or the provision of a separate drafting between carding and nonwoven, see for example EP 1 532 302 B1 ,

In beiden oben genannten Patentdokumenten werden die schwankenden Floreinlaufgeschwindigkeiten im Vliesleger durch einen integrierten Puffer kompensiert, der durch einen vergrößerten Fahrweg des Oberwagens und der dadurch erzielten längeren Schlaufe des ersten Flortransportbandes erzielt wird. Hierzu ist eine äußerst komplexe Steuerung des Oberwagens notwendig, um die Speicherbildung und Geschwindigkeitskompensation der einlaufenden Florbahn zu jedem Zeitpunkt des Legevorgangs exakt ausführen zu können.In both patent documents mentioned above, the fluctuating pile in speeds in the nonwoven layer are compensated by an integrated buffer, which is achieved by an increased travel of the upper carriage and the longer loop of the first pile conveyor belt achieved thereby. For this purpose, an extremely complex control of the superstructure is necessary in order to perform the storage formation and speed compensation of the incoming card web at each point in the laying process exactly.

WO 2010/073221 A2 beschreibt einen Florspeicher, bei dem der Flor im Sandwich zwischen zwei bewegten Flortransportbändern geführt ist. Eine senkrecht verstellbare Andrückwalze drückt dabei das oben liegende Flortransportband auf das unten liegende Flortransportband und ist somit für die Größenverstellung des Florspeichers verantwortlich. WO 2010/073221 A2 describes a pile store, in which the pile is sandwiched between two moving pile conveyor belts. A vertically adjustable pressure roller presses the overhead pile conveyor belt on the underlying pile conveyor belt and is thus responsible for the size adjustment of the storage tank.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Vliesleger zu schaffen, der einen integrierten Florspeicher aufweist, welcher auf einfache Weise eine Kompensation schwankender Floreinlaufgeschwindigkeiten bereits vor dem Eintritt der Florbahn in den Oberwagen des Vlieslegers liefert.The present invention has for its object to provide a nonwoven fabric, which has an integrated pile memory, which provides in a simple manner compensation fluctuating Floreinlaufgeschwindigkeiten already before the entry of the card web in the superstructure of the web laying.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Erfindungsgemäß weist der Vliesleger zum Legen eines Vlieses aus einer Florbahn einen im Querrichtung verfahrbaren Oberwagen auf, durch den die Florbahn geführt ist, außerdem einen in Querrichtung verfahrbaren Legewagen, durch den die vom Oberwagen kommende Florbahn geführt ist und der zur Abgabe der Florbahn auf ein Abliefertransportband dient. Weiterhin weist der Vliesleger mindestens zwei Flortransportbänder zur Führung der Florbahn zum Oberwagen und weiter zum Legewagen auf, wobei sich das obere Trum eines ersten umlaufenden rauen Flortransportbandes von einem Einlaufbereich des Vlieslegers hin zum Oberwagen erstreckt. Dabei ist ein positionsveränderliches Andrückmittel vorgesehen, das betätigbar ist, um im oberen Trum des ersten Flortransportbandes einen variablen Florspeicher zu erzeugen.According to the invention, the nonwoven laying for laying a fleece from a card web on a transversely movable superstructure through which the card web is guided, also a transversely movable carriage, through which the coming from the superstructure card is guided and the delivery of the card web on a delivery conveyor belt serves. Furthermore, the nonwoven depositor has at least two pile conveyor belts for guiding the pile web to the uppercarriage and further to the laying carriage, wherein the upper run of a first rotating rough pile conveyor belt extends from an inlet region of the web laying machine to the uppercarriage. In this case, a positionally variable pressure means is provided, which is operable to produce a variable pile storage in the upper run of the first Flortransportbandes.

Auf diese Weise wird ein integrierter Puffer in einem Vliesleger geschaffen, der ohne zusätzliche Ansteuerung des Oberwagens auskommt und auf einfache Weise eine Kompensation schwankender Floreinlaufgeschwindigkeiten während des Betriebs des Vlieslegers an der Florbahn durchführt, bevor die Florbahn in den Oberwagen eintritt.In this way, an integrated buffer is provided in a nonwoven, which does not require additional control of the superstructure and easily compensates for fluctuating Floreinlaufgeschwindigkeiten during operation of the web laying on the card web before the card web enters the superstructure.

In einer ersten alternativen Ausführungsform ist das Andrückmittel eine Andrückwalze, die vorzugsweise senkrecht verstellbar ist. So kann auf mechanisch einfache Weise die Ausbildung und Regelung eines variablen Florspeichers lediglich durch Bewegung eines einzigen Elementes erfolgen.In a first alternative embodiment, the pressing means is a pressure roller, which is preferably vertically adjustable. Thus, in a mechanically simple manner, the formation and control of a variable memory storage can be done only by movement of a single element.

Zur Sicherung der Florintegrität im Andrückbereich ist dabei zwischen dem oberen Trum des ersten Flortransportbandes und der Andrückwalze ein glattes Abdeckband angeordnet, während das erste Flortransportband rau ist. Auf diese Weise wird sichergestellt, dass die Florbahn lediglich aufgrund von Reibung durch das erste Flortransportband weiterbewegt wird, während sie am glatten Abdeckband entlanggleitet. Gleichzeitig wird eine Entkopplung der Andrückwalze von der Florbahn durch das zwischengeschaltete Abdeckband erzielt.To ensure the integrity of the pile in the pressure region, a smooth cover tape is arranged between the upper run of the first pile conveyor belt and the pressure roller, while the first pile conveyor belt is rough. In this way, it is ensured that the card web is merely advanced due to friction through the first pile conveyor belt while sliding along the smooth cover tape. At the same time a decoupling of the pressure roller is achieved by the card web through the intermediate masking tape.

In einer zweiten alternativen Ausführungsform ist das Andrückmittel ein Schwert. Vorzugsweise besitzt das Schwert eine glatte Oberfläche, während das erste Flortransportband rau ist. So kann die Florbahn wiederum aufgrund von Reibung vom ersten Flortransportband vorwärtsbewegt werden und im Bereich des Schwerts an diesem entlanggleiten.In a second alternative embodiment, the pressing means is a sword. Preferably, the sword has a smooth surface while the first pile conveyor belt is rough. Thus, the card web can in turn be moved forward due to friction of the first Flortransportband and slide along the sword in this area.

Bei Alternative 1 ist die Andrückwalze vorzugsweise derart bewegbar, dass sie von oben auf das Abdeckband und damit auch das obere Trum des ersten Flortransportbandes drückt. Vorteilhaft ist dabei, wenn die Andrückwalze auf einen schrägen Einlaufabschnitt des Abdeckbandes und des ersten Flortransportbandes drückt. Eine derartige Lösung für die Bildung des Florspeichers ist mechanisch bevorzugt.In alternative 1, the pressure roller is preferably movable so that it presses from above on the cover and thus also the upper run of the first pile conveyor belt. It is advantageous if the pressure roller presses on an oblique inlet portion of the cover strip and the first Flortransportbandes. Such a solution for the formation of the storage memory is mechanically preferred.

Vorzugsweise bilden zwei Umlenkwalzen des ersten Flortransportbandes seitliche Begrenzungen des Florspeichers und dienen dadurch als Spannhilfen beim durch die Andrückwalze initiierten Ausbilden des Florspeichers. Dies ermöglicht eine definierte Änderung der Größe des Florspeichers ohne Einsatz zusätzlicher Hilfsmittel.Preferably, two deflecting rollers of the first pile conveyor belt form lateral boundaries of the pile store and thereby serve as clamping aids in the formation of the pile store initiated by the pressure roll. This allows a defined change in the size of the memory without the use of additional resources.

In einer mechanisch bevorzugten Ausführungsform der Alternative 2 ist das Schwert schräg verschiebbar und ist bei Ausbildung des variablen Florspeichers zumindest in einem Teilabschnitt vom ersten Flortransportband umgeben.In a mechanically preferred embodiment of the alternative 2, the sword is obliquely displaceable and is surrounded at least in a partial section of the first pile conveyor belt in forming the variable pile memory.

Dabei verläuft das erste Flortransportband vorzugsweise entlang einer ersten Seitenfläche des Schwerts, dann über die stumpfe, relativ breite Spitze des Schwerts und anschließend entlang der zweiten Seitenfläche des Schwerts. Auf diese Weise kann lediglich durch Verschiebung des Schwerts der von Anfang an vorhandene schlaufenförmige Verlauf der Florbahn um das Schwert herum verlängert oder verkürzt werden.In this case, the first pile conveyor belt preferably runs along a first side surface of the sword, then over the blunt, relatively broad tip of the sword and then along the second side surface of the sword. In this way, can be extended or shortened around the sword only by shifting the sword of the existing from the beginning loop-shaped course of the card.

Zur definierten Speicherbildung bilden hierbei vorzugsweise zwei Umlenkwalzen des ersten Flortransportbandes seitliche Begrenzungen des Florspeichers und dienen als Spannhilfen beim durch das Schwert initiierten Ausbilden des Florspeichers.For defined memory formation, preferably two deflection rollers of the first pile conveyor belt form lateral boundaries of the pile store and serve as clamping aids in the formation of the pile store initiated by the sword.

Zum Ausgleich der bei der Bildung des Florspeichers benötigten zusätzlichen Länge des ersten Flortransportbandes ist vorzugsweise ein verfahrbarer Spannwagen vorgesehen, durch den das erste Flortransportband verläuft. Dieser Spannwagen kann entsprechend der benötigten zusätzlichen Länge des ersten Flortransportbandes gesteuert oder geregelt werden und somit für einen Ausgleich sorgen, damit das erste Flortransportband bezüglich seiner Gesamtlänge unbeeinflusst bleibt.In order to compensate for the additional length of the first pile transport belt required in the formation of the pile store, a moveable tensioning carriage is preferably provided, through which the first pile conveyor belt runs. This tensioning carriage can be controlled or regulated according to the required additional length of the first pile conveyor belt and thus provide a balance, so that the first pile conveyor belt remains unaffected in terms of its overall length.

Weitere Merkmale und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung unter Bezugnahme auf die Zeichnungen.

Fig. 1
ist eine schematische Querschnittsansicht einer Ausführungsform eines Vlieslegers, in dem die Erfindung angewendet werden kann;
Fig. 2
ist eine schematische Querschnittsansicht einer bevorzugten erfindungsgemäßen Florspeicherbildung im Einlaufbereich des Vlieslegers;
Fig. 3
ist eine schematische Querschnittsansicht einer bevorzugten Führung des Abdeckbandes im Bereich des Oberwagens;
Fig. 4
ist eine schematische Querschnittsansicht einer anderen bevorzugten Führung des Abdeckbandes im Bereich des Oberwagens; und
Fig. 5
ist eine schematische Querschnittsansicht einer alternativen Ausführungsform eines Vlieslegers mit alternativer erfindungsgemäßer Florspeicherbildung.
Further features and advantages of the present invention will become apparent from the following description with reference to the drawings.
Fig. 1
Fig. 3 is a schematic cross-sectional view of one embodiment of a nonwoven layer to which the invention can be applied;
Fig. 2
FIG. 4 is a schematic cross-sectional view of a preferred storage layer according to the invention in the inlet region of the nonwoven layer; FIG.
Fig. 3
is a schematic cross-sectional view of a preferred guide of the cover strip in the region of the upper carriage;
Fig. 4
is a schematic cross-sectional view of another preferred guide of the cover strip in the region of the upper carriage; and
Fig. 5
Figure 3 is a schematic cross-sectional view of an alternative embodiment of a nonwoven layerer with alternative pile memory formation according to the invention.

Fig. 1 zeigt eine schematische Querschnittsansicht eines Vlieslegers 2, bei dem die vorliegende Erfindung Anwendung finden kann. Man erkennt in Fig. 1 den Vliesleger 2 mit einem endlos umlaufenden Abliefertransportband 4, das dazu bestimmt ist, ein aus einer Florbahn 6 (siehe Fig. 2) gelegtes Vlies in einer senkrecht zur Zeichnungsebene verlaufenden Transportrichtung abzutransportieren. Von Führungseinrichtungen des Abliefertransportbandes 4 ist eine obere Umlenkwalze 8 dargestellt. Die Florbahn 6 ist aus Übersichtlichkeitsgründen nur in Fig. 2 dargestellt. Fig. 1 shows a schematic cross-sectional view of a nonwoven layer 2, to which the present invention can be applied. One recognizes in Fig. 1 the nonwoven layer 2 with an endless circulating delivery conveyor belt 4, which is intended, one from a card web 6 (see Fig. 2 ) Fleece laid in a direction perpendicular to the drawing plane transport direction. From guide devices of the delivery conveyor belt 4, an upper guide roller 8 is shown. The card web 6 is for clarity only in Fig. 2 shown.

Über dem Abliefertransportband 4 ist ein Legewagen 10 auf Schienen oder Rohren (nicht dargestellt) hin und her verfahrbar. In dem Legewagen 10 sind zwei Umlenkwalzen 12 und 14 frei drehbar gelagert. Die erste Umlenkwalze 12 ist von einem Flortransportband 16, im Folgenden auch zweites Flortransportband 16 genannt, teilumschlungen. Das zweite Flortransportband 16 ist an seinem ersten Ende 18 fest im nicht dargestellten Maschinengestell des Vlieslegers 2 befestigt und verläuft von dort aus in dichtem Abstand über dem Abliefertransportband 4 zum Legewagen 10, wo es um 180° umgelenkt wird und anschließend über vier ortsfeste Umlenkwalzen 20, 22, 24, 26 zur zweiten Umlenkwalze 14 im Legewagen zurückgeführt wird. Die Umlenkwalze 14, die ebenfalls im Legewagen 10 drehbar gelagert ist, ist von dem zweiten Flortransportband 16 teilumschlungen, so dass das Flortransportband 16 um 180° umgelenkt wird und vom unteren Austrittsbereich des Legewagens 10 in dichtem Abstand über dem Abliefertransportband 4 verläuft, bis es an seinem zweiten Ende 28 wiederum fest mit dem Maschinengestell des Vlieslegers 2 verbunden ist.About the delivery conveyor belt 4 is a laying carriage 10 on rails or tubes (not shown) moved back and forth. In the laying carriage 10, two guide rollers 12 and 14 are freely rotatably mounted. The first guide roller 12 is partially wrapped by a pile conveyor belt 16, hereinafter also called second pile conveyor belt 16. The second pile conveyor belt 16 is fixedly secured at its first end 18 in the machine frame, not shown, of the webbing 2 and runs from there at a close distance above the delivery conveyor belt 4 to laying carriage 10, where it is deflected by 180 ° and then four stationary guide rollers 20, 22, 24, 26 is returned to the second guide roller 14 in the laying carriage. The deflecting roller 14, which is also rotatably mounted in the laying carriage 10, is partially wrapped by the second web conveyor belt 16, so that the web conveyor belt 16 is deflected by 180 ° and from the lower exit region of the laying carriage 10 in dense distance above the delivery conveyor belt 4 runs until it is in turn connected at its second end 28 fixedly connected to the machine frame of the web layer 2.

Am Legewagen 10 ist eine Kette oder ein Zahnriemen angebracht, der beispielsweise über ein mit einem Motor verbundenes Antriebszahnrad und ein Umlenkrad läuft (alle Elemente nicht dargestellt). Mit Hilfe dieser Antriebseinrichtungen lässt sich der Legewagen 10 oberhalb des Abliefertransportbandes 4 quer zu dessen Transportrichtung hin und her verfahren.At the carriage 10, a chain or a toothed belt is mounted, which runs for example via a drive gear connected to a motor and a deflection wheel (all elements not shown). With the aid of these drive devices, the laying carriage 10 can be moved back and forth across the delivery conveyor belt 4 transversely to its transport direction.

In etwa auf selber Höhe wie der Legewagen 10 ist in dem Maschinengestell des Vlieslegers 2 ein Oberwagen 30 quer zur Transportrichtung des Abliefertransportbandes 4 auf Schienen oder Rohren (nicht dargestellt) verfahrbar gelagert. Die Schienen oder Rohre können dieselben Schienen oder Rohre sein, an denen auch der Legewagen 10 verfahrbar gelagert ist. Der Oberwagen 30 hat eine obere Umlenkwalze 32 und eine untere Umlenkwalze 34, die seitlich gegeneinander versetzt sind. Über diese beiden Umlenkwalzen 32, 34 läuft ein weiteres Flortransportband 36, das nachfolgend erstes Flortransportband 36 genannt wird. In dem Bereich, der von den beiden Umlenkwalzen 32, 34 im Oberwagen 30 begrenzt wird, verläuft das erste Flortransportband 36 schräg abwärts geneigt.In about the same height as the laying carriage 10 is in the machine frame of the webbing 2 an upper carriage 30 transversely to the transport direction of the delivery conveyor belt 4 on rails or tubes (not shown) movably mounted. The rails or tubes may be the same rails or tubes on which the laying carriage 10 is movably mounted. The uppercarriage 30 has an upper deflecting roller 32 and a lower deflecting roller 34, which are laterally offset from one another. About these two guide rollers 32, 34 runs another Flortransportband 36, which is subsequently called first Flortransportband 36. In the area bounded by the two deflection rollers 32, 34 in the uppercarriage 30, the first pile conveyor belt 36 slopes inclined downwards.

Von der unteren Umlenkwalze 34 im Oberwagen 30 ausgehend verläuft das erste Flortransportband 36 parallel zum rechten oberen Trum des zweiten Flortransportbandes 16. Das erste Flortransportband 36 verläuft geradlinig durch den Legewagen 10 und wird nach dem Legewagen 10 über eine ortsfest gelagerte, motorisch angetriebene Umlenkwalze 38 und von dort über eine in einem Spannwagen 40 gelagerte Umlenkwalze 42 geführt, um dann über mehrere im Maschinengestell des Vlieslegers 2 ortsfest gelagerte Umlenkwalzen 44, 46, 48, 50 zu laufen, bevor es den Oberwagen 30 wieder erreicht. Der Oberwagen 30 und der Spannwagen 40 können dabei über eine Kette oder einen Zahnriemen (nicht dargestellt) miteinander verbunden sein, der über ein mit einem Motor (nicht dargestellt) verbundenes Antriebszahnrad und ein Umlenkrad, die im Maschinengestell gelagert sind, läuft (nicht dargestellt). Der Spannwagen 40 ist dabei ebenfalls an Schienen oder Rohren (nicht dargestellt) verfahrbar gelagert. Ebenso kann es vorteilhaft sein, wenn die Bewegungen von Oberwagen 30 und Spannwagen 40 voneinander entkoppelt sind.Starting from the lower deflection roller 34 in the uppercarriage 30, the first Flortransportband 36 runs parallel to the right upper strand of the second Flortransportbandes 16. The first Flortransportband 36 runs straight through the laying carriage 10 and is after the laying carriage 10 via a stationary mounted, motor-driven guide rollers 38 and from there via a guide roller 42 mounted in a tensioning carriage 40, in order to then run over a plurality of guide rollers 44, 46, 48, 50 fixedly mounted in the machine frame of the webbing 2 before it reaches the superstructure 30 again. The superstructure 30 and the tensioning carriage 40 may be connected to each other via a chain or a toothed belt (not shown) which runs via a drive gearwheel (not shown) and a deflection wheel, which are mounted in the machine frame (not shown). , The clamping carriage 40 is also on rails or tubes (not shown) movably mounted. It may also be advantageous if the movements of superstructure 30 and clamping carriage 40 are decoupled from each other.

In dem Bereich zwischen der unteren Umlenkwalze 34 des Oberwagens 30 und der zweiten Umlenkwalze 14 des Legewagens 10 sind Abschnitte des ersten Flortransportbandes 36 und des zweiten Flortransportbandes 16 parallel zueinander in engem Abstand geführt, so dass eine vom ersten Flortransportband 36 herangeführte Florbahn 6 in dem genannten Bereich zwischen dem Oberwagen 30 und dem Legewagen 10 von dem ersten Flortransportband 36 und dem zweiten Flortransportband 16 sandwichartig eingeschlossen ist. Dabei ist die Florbahn 6 vom zweiten Flortransportband 16 abgestützt. Außerdem übernehmen die beiden sich zwischen Legewagen 10 und Maschinengestell des Vlieslegers 2 erstreckenden Abschnitte des zweiten Flortransportbandes 16 gleichzeitig auch die Funktion eines Abdeckbandes für das gelegte Vlies.In the area between the lower deflecting roller 34 of the upper carriage 30 and the second deflecting roller 14 of the laying carriage 10 are sections of the first pile conveyor belt 36 and the second Flortransportbandes 16 parallel to each other at a close distance, so that a zoom guided from the first Flortransportband 36 card web 6 is sandwiched in the said area between the superstructure 30 and the laying carriage 10 of the first Flortransportband 36 and the second Flortransportband 16. In this case, the card web 6 is supported by the second web transport belt 16. In addition, the two take over between carriage 10 and machine frame of the webbing 2 extending portions of the second Flortransportbandes 16 at the same time take over the function of a cover strip for the laid nonwoven.

Man erkennt in Fig. 1, dass im Betrieb der Oberwagen 30 und sein zugehöriger Spannwagen 40 eine zueinander gegenläufige Bewegung ausführen. Der Spannwagen 40 dient dazu, um die Schleifenlänge des ersten Flortransportbandes 36 konstant zu halten.One recognizes in Fig. 1 in that, during operation, the superstructure 30 and its associated tensioning carriage 40 execute a mutually opposite movement. The tensioning carriage 40 serves to keep the loop length of the first pile conveyor belt 36 constant.

Die Bewegungen von Legewagen 10 und Oberwagen 30 sind so aufeinander abgestimmt, dass bei Zuführung der Florbahn 6 mit gleichförmiger Geschwindigkeit in den Vliesleger 2 eine gesteuerte Ablage der Florbahn 6 ohne Streckungen oder Stauchungen innerhalb des Vlieslegers 2 auf dem Abliefertransportband 4 stattfinden kann. Dabei bewegt sich der Oberwagen 30 jeweils in dieselbe Richtung, im Mittel jedoch nur halb so schnell wie der Legewagen 10. Es wird auch der Tatsache Rechnung getragen, dass der Legewagen 10 im Bereich seiner Bewegungsumkehrstellung bis zum Stillstand abgebremst und wieder beschleunigt werden muss.The movements of laying carriage 10 and superstructure 30 are coordinated so that when feeding the card web 6 at a uniform speed in the nonwoven 2 a controlled storage of the card web 6 without stretching or compression within the batt 2 on the delivery conveyor belt 4 can take place. In this case, the superstructure 30 moves in each case in the same direction, on average only half as fast as the laying carriage 10. It is also taken into account that the laying carriage 10 has to be decelerated in the region of its movement reversal position to a standstill and accelerated again.

Zwischen den beiden Umlenkwalzen 12 und 14 im Legewagen 10 wird ein Spalt gebildet, der als Abgabespalt bezeichnet wird. Im Betrieb des Vlieslegers 2 sind beide Flortransportbänder 16, 36 so angetrieben, dass sie mit derselben Geschwindigkeit laufen.Between the two guide rollers 12 and 14 in the laying carriage 10, a gap is formed, which is referred to as a discharge gap. During operation of the fleece layer 2 both pile conveyor belts 16, 36 are driven so that they run at the same speed.

Wird die Florbahn 6 mit schwankender Geschwindigkeit zugeführt, etwa weil vor dem Vliesleger 2 ein zyklisch arbeitendes Streckwerk (nicht dargestellt) angeordnet ist, das eine wechselnde Dicke in der Florbahn 6 zum Zwecke der Erzielung einer Querprofilierung des gelegten Vlieses erzeugt, kann mit Hilfe eines variablen Florspeichers im Vliesleger 2 eine Florbahnpufferung innerhalb des Vlieslegers 2 vorgenommen werden.If the card web 6 is supplied at a variable speed, for example because a cyclically operating drafting arrangement (not shown) is arranged in front of the nonwoven layer 2 which produces an alternating thickness in the card web 6 for the purpose of achieving a transverse profiling of the laid nonwoven fabric Buffer memory in the nonwoven layer 2 a Florbahnpufferung be made within the batt 2.

Erfindungsgemäß wird dieser variable Florspeicher im Einlaufbereich des Vlieslegers 2 gebildet, ohne Änderung der Ansteuerung von Oberwagen 30 und Legewagen 10 zu erfordern.According to the invention, this variable pile memory is formed in the inlet region of the web layer 2 without requiring change in the control of the uppercarriage 30 and the laying carriage 10.

In einer ersten Ausführungsform des variablen Florspeichers weist der Vliesleger 2 hierzu ein Abdeckband 52 auf, das sich von einem Einlaufbereich des Vlieslegers 2 bis mindestens hin zum Oberwagen 30 erstreckt. Das Abdeckband 52 verläuft dabei unmittelbar oberhalb eines oberen Trums 54 des ersten Flortransportbandes 36, das in diesem Bereich als Auflagefläche für die Florbahn 6 dient und in Richtung des Pfeils A bewegt wird. Die Florbahn 6 ist somit zwischen dem oberen Trum 54 des ersten Flortransportbandes 36 und dem Abdeckband 52 eingeschlossen. Während das erste Flortransportband 36 rau ausgebildet ist, vorzugsweise als luftdurchlässiges Siebband, ist das Abdeckband 52 glatt ausgebildet und im Wesentlichen stationär im Vliesleger 2 angeordnet. Das Abdeckband 52 ist dabei vorzugsweise luftundurchlässig und beispielsweise aus teflon- oder PVCbeschichtetem Gewebe gebildet. Ebenso ist es möglich, dass das erste Flortransportband 36 luftundurchlässig ist, z.B. eine gewürfelte PVC-Oberfläche aufweist, während das stationäre Abdeckband 52 Poren hat, um den Luftaustritt zu erlauben, ohne dadurch rau zu werden. Es ist für manche Anwendungen auch denkbar, dass sowohl das Abdeckband 52 als auch das erste Flortransportband 36 luftundurchlässig sind.In a first embodiment of the variable pile memory, the fleece layer 2 for this purpose has a cover strip 52 which extends from an inlet region of the fleece layer 2 up to at least the superstructure 30. The cover strip 52 in this case runs directly above an upper run 54 of the first pile transport belt 36, which serves as a support surface for the card web 6 in this area and is moved in the direction of the arrow A. The card web 6 is thus enclosed between the upper run 54 of the first pile transport belt 36 and the cover 52. While the first Flortransportband 36 is formed rough, preferably as an air-permeable screen belt, the cover 52 is formed smooth and arranged substantially stationary in the nonwoven layer 2. The cover strip 52 is preferably impermeable to air and formed, for example, from Teflon or PVC coated fabric. It is also possible that the first pile transport belt 36 is impermeable to air, e.g. has a cubed PVC surface while the stationary cover tape 52 has pores to allow air leakage without becoming rough. It is also conceivable for some applications that both the cover band 52 and the first pile transport belt 36 are impermeable to air.

Das umlaufende erste Flortransportband 36 bewegt aufgrund von Reibkräften die darauf liegende Florbahn 6 mit, und das Abdeckband 52, welches nicht mit der Florbahn 6 mitbewegt wird, dient als stationäre Abdeckung und verhindert so eine ungewünschte Verwirbelung oder Verblasung von Fasern der Florbahn 6. Die Florbahn 6 bleibt damit größtenteils frei von Turbulenzen, womit höhere Florlaufgeschwindigkeiten realisiert werden können. Mit anderen Worten ist die Florbahn 6 als Sandwich zwischen dem oberen Trum 54 des ersten Flortransportbandes 36 und dem Abdeckband 52 geführt, wobei sie ausschließlich durch die Bewegung des ersten Flortransportbandes 36 vorwärts bewegt wird und das glatte Abdeckband 52 keine Behinderung der Bewegung der Florbahn 6 darstellt.The circulating first Flortransportband 36 moves due to frictional forces on the lying thereon card web 6, and the cover 52, which is not moved with the card web 6, serves as a stationary cover, thus preventing unwanted turbulence or blowing of fibers of the card web 6. The card web 6 remains largely free of turbulence, which higher Florlaufgeschwindigkeiten can be realized. In other words, the card web 6 is guided as a sandwich between the upper strand 54 of the first pile transport belt 36 and the cover 52, wherein it is moved only by the movement of the first Flortransportbandes 36 forward and the smooth cover belt 52 is not a hindrance to the movement of the card web 6 ,

Das Abdeckband 52 muss nicht notwendigerweise das gesamte obere Trum 54 des ersten Flortransportbandes 36 überdecken, verläuft aber vorzugsweise vom Einlaufbereich des Vlieslegers 2 durch den Oberwagen 30 hindurch. Das im Wesentlichen stationäre Abdeckband 52 ist an seinen beiden Enden vorzugsweise am Maschinengestell des Vlieslegers 2 fixiert. Das Abdeckband 52 verläuft dann von einem ersten Befestigungspunkt 56 im Einlaufbereich des Vlieslegers 2 der Bahn des ersten Flortransportbandes 36 folgend bis zum Oberwagen 30, durch diesen hindurch und vom Oberwagen 30 aus horizontal bis zum zweiten Befestigungspunkt 58 am rückwärtigen Ende des Vlieslegers 2. Im Bereich der Befestigungspunkte 56, 58 ist das Abdeckband 52 vorzugsweise mittels dehnbarer Mittel 60 im Maschinengestell des Vlieslegers 2 gelagert. Die dehnbaren Mittel 60 können entweder Federn oder Pneumatikzylinder oder andere geeignete Elemente umfassen.The masking tape 52 does not necessarily cover the entire upper run 54 of the first pile transport belt 36, but preferably extends from the entrance area of the batt 2 through the uppercarriage 30. The substantially stationary cover band 52 is preferably fixed at its two ends to the machine frame of the fleece layer 2. The cover strip 52 then extends from a first attachment point 56 in the inlet region of the webbing 2 of the web of the first Flortransportbandes 36 to the superstructure 30, through the latter and from the superstructure 30 horizontally to the second attachment point 58 at the rear end of the web layer 2. In the area the attachment points 56, 58, the cover band 52 is preferably mounted by means of stretchable means 60 in the machine frame of the web layer 2. The expandable means 60 may comprise either springs or pneumatic cylinders or other suitable elements.

Zur Bildung des Florspeichers weist der Vliesleger 2 außerdem in seinem Einlaufbereich ein Andrückmittel, hier eine senkrecht verstellbare Andrückwalze 62 auf. Die Andrückwalze 62 ist positionsveränderlich und vorzugsweise derart bewegbar, dass sie von oben auf das Abdeckband 52 und damit gleichzeitig auf das obere Trum 54 des ersten Flortransportbandes 36 drückt. Unterstützt werden kann diese Bewegung durch eine Unterstützungswalze 64, die ebenfalls im Einlaufbereich des Vlieslegers 2 angeordnet ist und von oben auf das Abdeckband 52 drückt. Um eine definierte Längung des Florlaufweges beim Absenken der Andrückwalze 62 zu gewährleisten, kann als Gegenspannmittel beispielsweise die Umlenkwalze 48 in Zusammenwirken mit der Umlenkwalze 46 eingesetzt werden. Der verlängerte Laufweg der Florbahn 6 verläuft dann zwischen der ausgefahrenen Andrückwalze 62 und der Umlenkwalze 48 im Wesentlichen senkrecht, wie aus der gestrichelten Darstellung der Speicherbildung in Fig. 2 hervorgeht. In der hier dargestellten besonders bevorzugten Ausführungsform drückt die Andrückwalze 62 dabei auf einen schrägen Einlaufabschnitt 66 des Abdeckbandes 52 und damit auch des ersten Flortransportbandes 36.In order to form the pile memory, the fleece layer 2 also has a pressing means in its inlet area, in this case a vertically adjustable pressure roller 62. The pressure roller 62 is positionally variable and preferably movable such that it presses from above onto the cover strip 52 and thus simultaneously onto the upper run 54 of the first pile transport belt 36. This movement can be assisted by a support roller 64, which is likewise arranged in the inlet region of the fleece layer 2 and presses on the cover strip 52 from above. In order to ensure a defined elongation of the Florlaufweges when lowering the pressure roller 62, can be used as a counter-clamping means, for example, the guide roller 48 in cooperation with the guide roller 46. The extended path of the card web 6 then runs between the extended pressure roller 62 and the guide roller 48 substantially perpendicular, as shown in dashed lines of memory formation in Fig. 2 evident. In the particularly preferred embodiment shown here, the pressure roller 62 presses on an oblique inlet section 66 of the cover strip 52 and thus also of the first pile transport belt 36.

Zum Ausgleich der im Florspeicher benötigten zusätzlichen Länge des Abdeckbandes 52 sind die dehnbaren Mittel 60 vorgesehen, durch welche die Aufhängung des Abdeckbandes 52 an seinen beiden Enden verlängert werden kann. Anders ist die Sachlage beim bewegten ersten Flortransportband 36. Zum Ausgleich der im Florspeicher benötigten zusätzlichen Länge des ersten Flortransportbandes 36 kann beispielsweise der Spannwagen 40 entsprechend geändert angesteuert werden. Im dargestellten Beispielsfall kann der Spannwagen 40 durch eine Bewegung nach links im Florspeicher benötigte zusätzliche Länge des ersten Flortransportbandes 36 liefern und gleichzeitig die Gesamtlänge des ersten Flortransportbandes 36 unverändert lassen. Es sind auch andere Ausgleichsmöglichkeiten innerhalb der geschlossenen Schlaufe des ersten Flortransportbandes 36 denkbar.In order to compensate for the additional length of the cover strip 52 required in the pile memory, the expandable means 60 are provided, by means of which the suspension of the cover strip 52 can be extended at its two ends. The situation is different for the moving first pile conveyor belt 36. To compensate for the additional length of the first pile conveyor belt 36 required in the pile store, for example, the tensioning carriage 40 can be actuated correspondingly changed. In the illustrated example case, the tensioning carriage 40 can deliver additional length of the first pile conveyor belt 36 required by movement to the left in the pile store and at the same time leave the total length of the first pile conveyor belt 36 unchanged. There are also other compensation options within the closed loop of the first Flortransportbandes 36 conceivable.

Durch diesen Florspeicher können die oben bereits erwähnten Geschwindigkeitsunterschiede der einlaufenden Florbahn 6 kompensiert werden, ohne dass die Bewegung von Oberwagen 30 oder Legewagen 10 im Vergleich zum Normalbetrieb geändert werden müsste.Through this pile memory, the above-mentioned speed differences of the incoming card web 6 can be compensated without the movement of superstructure 30 or laying carriage 10 would have to be changed compared to normal operation.

In Fig. 3 ist eine Möglichkeit der Führung des Abdeckbandes 52 im Oberwagen 30 dargestellt. Aufgrund der Hin- und Herfahrt des Oberwagens 30 muss das im Wesentlichen stationäre Abdeckband 52 eine Abstützung sowohl nach links als auch nach rechts erfahren, damit es bei der Bewegung des Oberwagens 30 jeweils auf definierte Weise durch diesen hindurchgleiten kann. Hierzu benötigt man ein zusätzliches Führungselement 68, im dargestellten Beispielsfall einen Führungsschuh, der möglichst glatt ausgebildet sein muss und der unteren Umlenkwalze 34 des Oberwagens 30 angrenzend gegenüberliegt.In Fig. 3 is shown a possibility of guiding the cover strip 52 in the uppercar 30. Due to the back and forth of the upper carriage 30, the substantially stationary cover band 52 must experience a support both to the left and to the right, so that it can slide through the latter during the movement of the upper carriage 30 in a defined manner. For this purpose, one needs an additional guide element 68, in the illustrated example, a guide shoe, which must be as smooth as possible and the lower guide roller 34 of the upper carriage 30 is adjacent.

In Fig. 4 ist eine alternative Möglichkeit der Führung des Abdeckbandes 52 im Oberwagen 30 dargestellt. Hierbei ist das Führungselement 68 als mit dem Oberwagen 30 mitbewegte glatte Walze ausgebildet, die oberhalb der unteren Umlenkwalze 34 angeordnet ist und um die das Abdeckband 52 umgelenkt wird. In einem solchen Fall ist es vorteilhaft, wenn für die Führung der Florbahn um die untere Umlenkwalze 34 ein zusätzliches Führungsmittel 69 vorgesehen ist, etwa das aus EP 1 947 223 A1 bekannte Führungsmittel.In Fig. 4 an alternative possibility of guiding the cover band 52 in the uppercarriage 30 is shown. In this case, the guide element 68 is designed as a co-moving with the superstructure 30 smooth roller, which is arranged above the lower guide roller 34 and the cover strip 52 is deflected. In such a case, it is advantageous if an additional guide means 69 is provided for the guidance of the card web around the lower deflection roller 34, for example that EP 1 947 223 A1 known guiding means.

Gemäß den bisherigen Ausführungen sind insgesamt zwei Flortransportbänder 16, 36 im Vliesleger 2 enthalten. Die Erfindung lässt sich auch auf andere Vliesleger mit zwei Flortransportbändern anwenden, ebenso auf alle anderen Vliesleger, u.a. solche mit drei Bändern anwenden. Ein Beispiel eines solchen Vlieslegers mit drei Flortransportbändern ist in Fig. 5 dargestellt. Bei dem in Fig. 5 dargestellten Vliesleger ist das zweite Flortransportband 16 der Ausführungsform aus Fig. 1 ersetzt durch ein zweites Flortransportband 70 und ein drittes Flortransportband 72, die in einem gemeinsamen Spannwagen 74 umgelenkt werden.According to the previous embodiments, a total of two pile conveyor belts 16, 36 are contained in the fleece layer 2. The invention can also be applied to other fleece layers with two pile conveyor belts, as well as to all other fleece layers, including those with three tapes. An example of such a fleece layer with three pile conveyor belts is in Fig. 5 shown. At the in Fig. 5 The illustrated nonwoven layer is the second pile conveyor belt 16 of the embodiment Fig. 1 replaced by a second pile conveyor belt 70 and a third pile conveyor belt 72, which are deflected in a common tensioning carriage 74.

Die Erfindung ist ebenfalls auf gegenläufige Vliesleger anzuwenden, bei denen sich der Oberwagen 30 und der Legewagen 10 entgegengesetzt bewegen, oder auf Steilarm-Vliesleger.The invention is also applicable to reverse web layers in which the uppercarriage 30 and the laying carriage 10 move in opposite directions, or to the low-arm leveler.

In Fig. 5 ist außerdem eine alternative Ausführungsform des Andrückmittels und der Florspeicherbildung gezeigt. In dieser Ausführungsform ist das positionsveränderliche Andrückmittel als verschiebbares Schwert 76 ausgebildet. Das Schwert 76 ist vorzugsweise schräg ausgerichtet und verläuft zwischen zwei Umlenkwalzen 47 und 48 des ersten Flortransportbandes 36. Dabei ist das Schwert 76 mit einer glatten Oberfläche ausgestattet, so dass die Vorwärtsbewegung der Florbahn 6 ausschließlich durch das erste raue Flortransportband 36 erfolgt, während die Florbahn am glatten Schwert 76 entlanggleitet. Zur Variation des Florspeichers kann das Schwert 76 hin- und herverschoben werden. Zur Verschiebung können alle dem Fachmann geläufigen Antriebsmittel eingesetzt werden.In Fig. 5 In addition, an alternative embodiment of the pressing means and the Florspeicherbildung is shown. In this embodiment, the positionally variable pressing means is designed as a displaceable sword 76. The sword 76 is preferably oriented obliquely and extends between two guide rollers 47 and 48 of the first Flortransportbandes 36. In this case, the sword 76 is provided with a smooth surface, so that the forward movement of the card web 6 is done exclusively by the first rough Flortransportband 36, while the card web along the smooth sword 76 slides along. To vary the storage capacity, the sword 76 can be moved back and forth. For shifting all common to the expert drive means can be used.

Das obere Trum 54 des ersten Flortransportbandes 36 verläuft somit im gebildeten Florspeicher entlang einer ersten Seitenfläche 78 des Schwerts, woraufhin es über die Spitze 80 des Schwerts 76 und daraufhin entlang der zweiten Seitenfläche 82 des Schwerts 76 geführt ist. Die Dimensionen des Schwerts 76 sind je nach Anwendungszweck wählbar, allerdings sollte die Spitze 80 des Schwerts 76 relativ stumpf und breit sein, um ein einfaches Gleiten der Florbahn 6 über die Spitze 80 zu ermöglichen. Die Spitze 80 könnte beispielsweise der Form eines Halbkreises nachempfunden sein. Im dargestellten Ausführungsbeispiel sind die erste Seitenfläche 78 und die zweite Seitenfläche 82 des Schwerts 76 parallel zueinander angeordnet. Beispielsweise können die Seitenflächen 78, 82 des Schwerts 76 auch gekrümmt sein und/oder von der Spitze 80 des Schwerts 76 aus auseinander laufen.The upper run 54 of the first pile conveyor belt 36 thus runs in the formed pile memory along a first side face 78 of the sword, after which it is guided over the tip 80 of the sword 76 and then along the second side face 82 of the sword 76. The dimensions of the sword 76 are selectable depending on the application, but the tip 80 of the sword 76 should be relatively blunt and wide to allow easy sliding of the card web 6 over the tip 80. The tip 80 could be modeled, for example, the shape of a semicircle. In the illustrated embodiment, the first side surface 78 and the second side surface 82 of the sword 76 are arranged parallel to each other. For example, the side surfaces 78, 82 of the sword 76 may also be curved and / or diverge from the tip 80 of the sword 76.

Neben den beiden dargestellten Varianten des Andrückmittels sind noch weitere äquivalente Ausführungsformen denkbar, mit denen der Fachmann einen variablen Florspeicher zur Verlängerung des Laufwegs der Florbahn 6 im oberen Trum 54 des ersten Flortransportbandes 36 erzeugen kann.In addition to the two illustrated variants of the pressing means, further equivalent embodiments are conceivable with which the person skilled in the art can produce a variable pile store for lengthening the travel path of the card web 6 in the upper run 54 of the first pile transport belt 36.

Claims (10)

  1. Fibrous web laying device for laying a fibrous web from a card web (6) with an upper carriage (30) which is movable in the transverse direction and through which the card web (6) is guided, a laying carriage (10) which is movable in the transverse direction and through which the card web (6) coming from the upper carriage (30) is guided and which serves for delivering the card web (6) onto an output conveyor belt (4),
    and at least two card web transport belts (16, 36, 70, 72) for guiding the card web (6) to the upper carriage (30) and further to the laying carriage (10), wherein an upper strand (54) of a first revolving rough card web transport belt (36) extends from an inlet area of the fibrous web laying device (2) up to the upper carriage (30) and serves as a bearing support face for the card web (6),
    characterised in that a position-variable contact pressure means (62, 76) is provided which can be actuated to create a variable card web store in the upper strand (54) of the first card web transport belt (36),
    wherein the contact pressure means (62, 76) is a contact pressure roller (62) and a smooth cover band (52) is arranged between the upper strand (54) of the first card web transport belt (36) and the contact pressure roller (62), or wherein the contact pressure means is a blade (76) which has a smooth surface.
  2. Fibrous web laying device according to claim 1, with regard to the contact pressure roller (62) as the contact pressure means, characterised in that the contact pressure roller (62) is perpendicularly adjustable.
  3. Fibrous web laying device according to claim 1, with regard to the contact pressure roller (62) as contact pressure means, or according to claim 2, characterised in that the contact pressure roller (62) is movable so that it presses from above onto the cover band (52) and thus also onto the upper strand (54) of the first card web transport belt (36).
  4. Fibrous web laying device according to claim 3, characterised in that the contact pressure roller (62) presses onto an inclined inlet section (66) of the cover band (52) and of the first card web transport belt (36).
  5. Fibrous web laying device according to claim 4, characterised in that two deflection rollers (46, 48) of the first card web transport belt (36) form lateral boundaries of the card web store and serve as tension aids during the formation of the card web store initiated by the contact pressure roller (62).
  6. Fibrous web laying device according to claim 1, with regard to the blade (76) as contact pressure means, characterised in that the blade (76) is obliquely displaceable.
  7. Fibrous web laying device according to claim 1, with regard to the blade (76) as contact pressure means, or according to claim 6, characterised in that during formation of the variable card web store the blade (76) is surrounded at least in one partial section by the first card web transport belt (36).
  8. Fibrous web laying device according to claim 7 characterised in that the first card web transport belt (36) runs along a first side face (78) of the blade (76), then over the obtuse relatively wide tip (80) of the blade (76) and then along the second side face (82) of the blade (76).
  9. Fibrous web laying device according to claim 1, with regard to the blade (76) as contact pressure means, or according to one of claims 6 to 8 characterised in that two guide rollers (47, 48) of the first card web transport belt (36) form lateral boundaries of the card web store and serve as tension aids during the formation of the card store initiated by the blade (76).
  10. Fibrous web laying device according to one of the preceding claims characterised in that a movable tension carriage (40) is provided through which the first card web transport belt (36) runs and whose movement for compensating the additional length of the first card web transport belt (36) required in the card web store can be controlled or regulated.
EP11151390.9A 2011-01-19 2011-01-19 Fibrous web laying device Not-in-force EP2479330B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP11151390.9A EP2479330B1 (en) 2011-01-19 2011-01-19 Fibrous web laying device
CN201210012966.8A CN102605485B (en) 2011-01-19 2012-01-16 Fleece layer
US13/353,679 US8458999B2 (en) 2011-01-19 2012-01-19 Fleece layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11151390.9A EP2479330B1 (en) 2011-01-19 2011-01-19 Fibrous web laying device

Publications (2)

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EP2479330A1 EP2479330A1 (en) 2012-07-25
EP2479330B1 true EP2479330B1 (en) 2013-12-18

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EP11151390.9A Not-in-force EP2479330B1 (en) 2011-01-19 2011-01-19 Fibrous web laying device

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EP (1) EP2479330B1 (en)
CN (1) CN102605485B (en)

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CN102605485A (en) 2012-07-25
US8458999B2 (en) 2013-06-11
CN102605485B (en) 2014-08-20
US20120180265A1 (en) 2012-07-19
EP2479330A1 (en) 2012-07-25

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