DE102008008549A1 - Apparatus for producing and solidifying a pure spunbonded nonwoven - Google Patents

Abstract

The invention relates to a device for solidifying staple fibers, microfibers or meltblown fibers or a spunbonded nonwoven fabric formed from filaments, to which at least one first endless belt (5) guided via deflecting rollers (2) belongs, on which filaments (1.1) are deposited by means of a depositing device (1). are stored and to the at least one further or second on the guide rollers (2) out in the same direction, the first endless belt (5) driven endless belt (6) is heard, which is arranged at a distance from the first endless belt (5) and in the Dispensing and receiving or transition region (22) at least a third conveying member (endless belt 4, sieve drum 19) with a suction device (7, 7.1) is provided. According to the invention, at least the fiber webs of the first and second endless belts (5, 6) guided on an outer side of a run (2.1) are guided in one plane or approximately in a same plane (14) or the guide rollers in the transfer region (22). of the first and second endless belts (5, 6) lie in one plane or in approximately the same plane (14) or are arranged at approximately the same height.

Description

The The invention relates to a device for solidifying Staple fibers, microfibers or meltblown fibers or one of filaments formed spunbonded to the at least one over deflection rollers owned first endless belt belongs on the filaments be stored with the help of a storage device and to the at least another or second guided over the guide rollers, in the same direction as the first endless belt powered endless belt heard, arranged at a distance from the first endless belt is and in their delivery and admission or transition area at least one third conveyor (endless belt, screen drum) with a suction device is provided.

A device is known ( EP-A-0 418 493 ) with a spinning tower, which serves to deposit a meltblown fleece on the first filament fleece. Both together obviously have such a high strength that the transfer of the Kompositvlieses on the separate circumferential, arranged at the same height, water needling endless belt is possible. Advantageously, this construction alone insofar, because the filing endless belt is not wetted by the necessary water needling. The filing endless belt remains dry and does not hinder the further order filing of filaments. This can be seen in contrast to the method according to WO 02/084006 A1 , after which the first needling already takes place on the filing endless belt. Thus, the endless belt is at least damp by the water needling with suction and must be additionally dried to ensure a trouble filament storage process. The procedure with the known arrangement of a pure water-needling endless belt with light filament nonwovens is not possible. The transfer to the second endless belt is not faultless, the filaments stick to the filing endless belt and run into the unavoidable gap between the successive endless belts. Transfer endless belts of this type are by the WO-A-02/50354 or 02/50356 or in connection with a subsequent needling drum through the WO-A-2006/000282 known. An under suction pullover transfer drum is also by the US-A-5 141 833 or the EP-A-1 223 135 known. In all cases, it is not about the transport of a spunbonded fabric, but about the transport of a pulp or Stapelfaservlieses. In the production of spunbonded non-woven fabric, the transfer of the finest filament fibers takes place on a multi-layer coarse endless belt with connecting seam, while in the water needling for uniform structureless needling a fine sieve belt without seam is required.

Furthermore, a device of this type is known ( US 2006/02866887 ), which serves to solidify a spunbonded web formed of filaments, to which at least one first endless belt guided by deflection rollers is deposited, on which filaments are deposited with the aid of a depositing device and to which at least one further or second guided over the deflecting rollers, in the same direction belongs to the first endless belt driven endless belt, which is arranged at a distance from the first endless belt, wherein in the dispensing and receiving or transition region at least a third conveying member is provided as a screening drum with a suction device. The screen drum touches the guide roller in the discharge area so unfavorably that especially at the contact point between the drum and guide roller or conveying member fleece can not be completely lifted, especially since the suction air from the screen drum must flow laterally past the guide roller or the conveying member. In this way, fleece residues remain hanging on the surface of the first endless belt.

at the plant of the screen roller against the surface in the area the deflection roller can, in particular in this area, the fleece clamp on the surface of the screen roller or in the screen openings penetration. With continuous use of the endless belt pile up therefore nonwoven remnants on a larger scale at the surface of the endless belt, which significantly affects the production process becomes. When planting the screen rollers against the guide roller may be especially in this area the fleece on the surface clamp the screen roller. Furthermore, the filaments can move in the fleece, if the fleece is deflected too much.

Of the Invention has for its object to develop a device with the deposited on a filing endless belt spunbond without Impairment or diversion and different tensile stress can be given to a subsequent second endless belt, without leaving nonwovens on the surface of the endless belt or stick to the sieve drum.

to Solution of the problem is provided that at least on an outside of a run led fiber webs the first and second endless belt in a plane or about in are guided in a same plane or the guide rollers in dm transfer area of the first and second endless belt lie in a plane or in approximately the same plane or are arranged at about the same height.

For this purpose, it is advantageous that the strand further transporting the strand of the first and second endless belt and the strand of the other or third endless belt parallel or approximately par Allel are aligned to the plane or horizontally extending plane. In this way, the web can be conveyed in a straight line without diversion with uniform tensile stress on the two endless belts. It is also advantageous that the first and second endless belt and / or the third endless belt are formed as separate, separate bands. Such bands can be replaced much easier in case of need.

It is also advantageous that the delivery area of the first endless belt from the front portion of the third endless belt and the receiving portion of the second endless belt from the rear portion of the third endless belt is at least partially overlapped. Since only part of the transfer band or third endless belt overlaps the underlying endless belts, you can also without further on the further transport of the web one greater distance or clearance between the dispensing and bridging the receiving side of the two endless belts. The space between the endless belts also creates easy way to service access to the upper third endless belt or the sieve drum.

Further it is advantageous that the further transporting the fiber web Trum of the first and second endless belt parallel to the horizontally or approximately horizontally or inclined Level and to the downward strand of the third endless band are arranged.

Also it is advantageous that within the third endless belt and in the transfer area of the first and second endless belt the suction device is arranged and the endless belts are each formed as a screen belt. This will be on easy Way in the area of the transition point between the two Endless tapes the fleece at the bottom of the strand of the held third or upper endless belt.

It is also advantageous that between a guide roller in the delivery area the third endless belt and a receiving area of the second endless belt a gap is formed in which within the third endless belt a nozzle bar and within the second endless belt a suction device is provided. This gives you for easy maintenance access to the top Endless belt and the further transport of the fleece can from this point from being observed and corrected.

Further It is advantageous that in the area of the outside of the second endless belt between the first from the nozzle bar and the suction device formed a Vernadelungseinrichtung a or several needling devices (nozzle bar, suction device) are provided. Will the endless belt after the suction device from top to bottom, d. H. pressurized with pressurized water, so the web is readily repelled from the upper endless belt and delivered to the subsequent second volume. For this it is advantageous that below the upper endless belt of the nozzle bar and including the suction device is provided. This prevents that the fleece sticks to the upper endless belt and again with revolves. For this it is advantageous that nozzle bars and suction device, in particular in the delivery area of the upper and are provided in the receiving area of the lower band and thus prevents the fleece in the upper belt or endless belt hooked and dragged on. Through the straightforward leadership The fleece is also a displacement of the filaments prevented. Furthermore, the web is not claimed differently on train.

To another embodiment, it is advantageous that at least the run on the outside of the run Fiber web of the first and second endless band in about the same Level, wherein the delivery area of the first endless belt and the receiving area of the second endless belt per a strand section have, which lie on a sloping plane and so on form a funnel-shaped or V-shaped space in which at least a part of the screen drum is added. With the help of the sieve drum, which is easier to install due to space constraints, is also a perfect transport of the web of the first ensured and ensured on the second endless belt that the fleece in particular in the delivery area of endless belt and Sieve drum not on the surface of the conveying organs sticks. For this purpose, in the field of sieve drum suction and Blowing devices provided.

From The advantage is that the funnel or V-shaped space between the first and second endless bands include an angle, between 20 ° and 160 ° or between 40 ° and 120 ° or between 80 ° and 100 ° and that in the V-shaped bulge between 10% and 60% or between 20% and 50% or between 25% and 35% of the outside Volume volume of the screening drum are added. This preserves in a simple way, a wrap angle for the Screening drum, which adjusted to the appropriate nonwoven structure can be.

It is also advantageous that the runner sections, each lying on a sloping plane, extend tangentially to the outside of the screening drum and the runner sections of the first and second endless belts, which lie on the inclined plane in this area over two or more spaced apart orderly guide rollers are guided, wherein in a space formed by a distance of the two adjacent guide rollers intermediate space of the second endless belt, a suction device is provided on the inside of the corresponding run. Further, even in the straight section, the air can be sucked from the screen drum or discharged to the suction device, the straight section promoting the air supply through the screen belt.

From Another advantage is that the sieve drum the suction with a large Intake opening or with numerous intake openings in the angular range α, which are aligned or formed, that they are essentially in a delivery area of the strand section and in the transition region of the first endless belt and / or also partially in the receiving area of the second endless belt their suction effect unfold.

It It is also advantageous that the sieve drum the cover or inner covering device arranged in such a way that only in the delivery area or in the area of the strand section of the first Endless band lying on the inclined plane, one Suction occurs.

Further it is advantageous that the screening drum, the cover or Inner covering having its suction opening or Suction section in the direction of the delivery area or in the area the strand portion of the first endless band, which is inclined on the extending plane is adjustable. Between the two guide rollers in the distance range of the two adjacent deflection rollers can advantageously the screen drum with its suction part the Remove fleece in a very targeted manner from the first endless belt. By the with spaced guide rollers is between the Both deflection rollers created a free space, allowing air from the rear of the endless belt and thereby the fleece without Residues from the top of the first endless belt can be removed. The sieve drum touches the guide roller in the delivery area in such a way that in particular at the landing place between the screen drum and guide roller or conveyor organ the Fleece can now be completely lifted, especially the Extraction air from the drum no longer on the side of the guide roller or must flow past the funding agency, but directly from the back of the endless band over one Gap can flow. That way, stay on the Surface of the first endless belt no fleece residues hang. With continuous use of the endless belt piling up therefore also no fleece residues on the surface of the endless belt, whereby the production process is significantly favored.

• a) dem Spinnturm zur Erzeugung der Filamente mit einer Kühlkammer, einer Verstreckeinheit und einer Filamentablageeinheit, wobei die Filamentablageeinheit aus dem die Spinnvliesbahn transportierenden, siebförmigen Ablage-Endlosband besteht, das zwischen mindestens zwei Walzen gespannt geführt und umgelenkt ist, und im Ablagebereich unterhalb des Endiosbandes eine Saugvorrichtung vorgesehen ist;
• b) der dem Endlosband folgenden, gesondert umlaufenden, durchlässigen Einrichtung (Endlosband) zur Vorvernadelung und/oder Vernadelung der Spinnvliesbahn, wozu dem Arbeitstrum der Einrichtung über die Arbeitsbreite zum Netzen und/oder Vernadeln zumindest einen Düsenbalken mit der Absaugvorrichtung zugeordnet ist, wobei sich die Absaugvorrichtung unterhalb des Trums befindet;
• c) der siebförmigen Übergabeeinheit, die die beiden Endlosbänder überlappt oder zumindest teilweise überlappt und die Spinnvliesbahn verzugsfrei weiter transportiert, wobei die Spinnvliesbahn bei der Abnahme vom vorlaufenden Endlosband und bei der Übergabe auf das folgende Endlosband allein auf der unteren Außenseite des Endlosbandes gehalten ist.

Also advantageous is an apparatus for producing a pure spunbonded nonwoven from endless filaments and for solidifying this spunbonded nonwoven by means of hydrodynamic needling consisting of

• a) the spinning tower for producing the filaments with a cooling chamber, a drawing unit and a Filamentablageeinheit, the Filamentablageeinheit from the spunbond web transporting, sieve-shaped endless storage belt, which is guided and deflected stretched between at least two rollers, and in the storage area below the Endiosbandes a suction device is provided;
• b) the following the endless belt, separately encircling, permeable device (endless belt) for pre-needling and / or needling of spunbonded web, including the Arbeitstrum the device on the working width for nets and / or needling at least one nozzle beam is associated with the suction, wherein the Suction device is located below the strand;
• c) the sieve-shaped transfer unit which overlaps or at least partially overlaps the two endless belts and further transports the spunbonded nonwoven web, wherein the spunbonded web is held on the lower outer side of the endless belt during removal from the leading endless belt and when transferring to the following endless belt.

Further it is advantageous that the suction device for holding the spunbonded web on the outside of the third endless belt on the inside provided in the transfer area of the two endless belts is and unfolds a suction pressure.

From Another advantage is that the screen drum is driven in the same direction Like the strands of endless ribbons that are on the horizontal and / or sloping plane are arranged.

It is also advantageous that the spunbonded web at the transfer on the endless belt, which is designed as Vernadelungsendlosband with the help of one or more suction devices under induced draft is and with the help of one or more overpressure devices (Nozzle bar) is acted upon.

Also it is advantageous that the pressure device as blowing device or water needling nozzle bar is formed, the the Flüssigkeitsabsaugvorrichtung is assigned.

The transfer unit between the two storage and Vernadelungs-endless belts can as a third, but counter-rotating, standing at the bottom Arbeitsstrum under suction train Überga Be endless belt or as a standing under suction, counter-rotating transfer screen drum to be formed.

It is also advantageous that at least two guide rollers of the two Endless tapes in the transition area on the same Height or same level lie, with the two levels of strands of the first and / or second endless band each on one inclined plane or only the run of the second endless belt arranged on a sloping or partially extending plane can be.

Advantageous It is this that the lower strands of the two adjacent Endless belts in the direction of the endless belt or transfer endless belt be moved up so that the two strands between the Deflection rollers in the delivery area on a straight line before and after the Deflection rollers run on a sloping plane.

Advantageous It is also that in the area of the strand section between the outer circumference the screening drum and the run-end section is provided with a gap, so that air can flow into this area and that a blower is provided in the area of the run-end section.

It is also advantageous that a final part of the suction box with a distance before or after a narrowest point between the outer circumference the screening drum and the straight strand section ends.

Further it is advantageous that the final part of the suction box with a Distance before or after the narrowest point between the outer circumference the screening drum and the straight Trum section ends, the Distance between the narrowest point and the final part between 0 and 20 mm advantageously between 0 to 10 mm or between 0 and 5 or between 5 to 10 mm.

Further Advantages and details of the invention are in the claims and explained in the description and illustrated in the figures.

there demonstrate:

1 1 a schematic representation of a part of an overall system of a spun-bonded production plant with three endless belts and a hydrodynamic solidification unit associated with the second endless belt, in a side view,

1a and 1b two further embodiments of the tape guide of the endless belts,

2 a second embodiment of a spunbond fabricating plant with two endless belts, which is also associated with a hydrodynamic solidification unit, wherein in the transition region of the two endless belts a screen drum is provided.

2a a section of the screen drum and the straight run section of the first endless belt according to 2 .

In 1 and 2 is a storage device 1 schematically illustrated, with their help staple fibers, in particular filaments 1.1 , on a first endless band 5 can be stored.

The storage device 1 can be used as a spinning tower for the production of artificial filaments, such. As polyamide filaments of molten plastic granules, be formed, to which a cooling chamber, not shown in the drawing, an adjoining drawing unit and an adjoining filament dispensing unit belongs. With the help of the spinning tower endless filaments on the storage belt or endless belt 5 stored. With the help of further storage devices, not shown in the drawing, S = staple fibers or microfibers or M. = meltblown for fiber spunbonded nonwovens can be deposited on the endless belt. The filing of the fibers can be done in the order SMS or SSS or SS or SSM.

To the apparatus for solidifying a spunbonded web formed from staple fibers, microfibers or filaments that includes at least two deflection rollers 2 Guided first endless belt 5 , In the embodiment, the first endless belt 5 over four guide rollers 2 guided tense, it can be provided depending on the work process, three or more guide rollers.

The first endless band 5 is according to a in 1 . 1a . 1b and 2 illustrated arrow 17 . 30 with his upper strand 2.1 driven in the same direction as the upper run of an endless belt 6 , The fiber web further transporting Trum 2.1 the first and second endless belt 5 . 6 and a strand 4.1 another or third endless belt or transfer endless belt 4 are parallel or approximately parallel to a plane or horizontally extending plane 14 aligned.

It is particularly advantageous if at least two deflection rollers 2.3 and 2.4 the two endless belts 5 . 6 in a transition area 22 at the same height or same level 14 lie, the level 14 but can also be inclined or only partially inclined running arranged. In this way it is avoided that the filaments during further transport, especially in the transfer area the two endless belts 5 . 6 move.

According to a third embodiment according to 1a can the lower strands 5.2 and 6.2 the two adjacent endless bands 5 . 6 and the strand 4.2 in the direction of the upper endless belt or transfer endless belt 4 around the distance 31 be moved so that the two strands 5.2 . 6.2 between the guide rollers 2.3 . 2.4 in the delivery area before and after the guide rollers 2.3 . 2.4 on the inclined plane 14.1 run. This gives a better compaction of the fleece and a better tape guide. It can either be the two levels 14 the run 5.2 and 6.2 the first and / or second endless belt 5 . 6 each on the inclined plane or just the strand 6.2 of the second endless belt 6 be arranged on a tilted or only partially inclined plane. By the displacement of the guide rollers 2.3 . 2.4 also runs up a strand 4.5 of the endless belt on inclined planes and thereby forms approximately a downwardly open V.

The dream 2.1 the first and second endless belt 5 . 6 as well as the strand 4.1 of the third endless belt 4 are according to 1 over the four guide rollers 2 tense led. The endless ribbons 4 . 5 . 6 can be designed as screen belts with different sized screen openings.

The first endless band 5 is below the storage device 1 for receiving the filaments 1.1 intended. In the area of the deposit of the endless belt 5 there is a suction device 29 , which puts the endless belt in this area under induced draft, so that a controlled filing of the filaments on the endless belt 5 can be done.

Viewed in the conveying direction is located after the receiving point of the filaments 1.1 on the endless belt or the suction device 29 a press roll pair 3 , with which the spunbonded fabric is precompressed in a dry state. Furthermore, the press rolls serve 3 for sealing, so that the air is led straight through the plant and already at this point the fleece can be compacted without it merges.

The first and second endless belt 5 . 6 and / or the third upper endless belt 4 , Also referred to as transfer belt, are designed as independent, separately operating bands and are driven via a respective drive device not shown in the drawing. The third upper endless band 4 is symmetrical to a midline 15 aligned. This gives a dry and a wet area, so that in the dry area of the left endless belt, the material is not prone to corrosion and thus the left part of the device can be produced more cheaply than the device part, which operates in the wet area.

The second endless band 6 is in accordance with 1 and 2 with his upper strand 2.1 at the same level 14 like the dream 2.1 of the first endless belt 5 , In this way, an advantageous transfer of the spunbonded to the subsequent endless belt 6 possible without deflection or change in direction of the spunbonded fabric. The second endless band 6 can with a distance 16 from about a meter or less to the first endless belt 5 be arranged. In this way you get a good access to the third endless belt 4 for maintenance work to make any corrections to the position or the leadership of the spunbonded fabric. Furthermore, the dry area is effectively protected from the wet area.

A delivery area 20 of the first endless belt 5 is from the front of the third, above the first endless belt 5 lying endless belt 4 and a recording area 21 of the second endless belt 6 from the rear of the third endless belt 4 overlapped or at least partially drowned.

Within the third endless belt 4 or on the inside of the lower run of the third endless belt 4 as well as in a transfer area 22 the first and second endless belt 5 . 6 is a suction device 7 arranged, which ensures that the spunbonded by means of the negative pressure in the suction device 7 on the outside of the lower run of the third endless belt 4 is held. This also ensures that the fleece without too much tension on the endless belts 5 . 6 is transported further.

Between a guide roller 2.2 in the delivery area of the third endless belt 4 and a recording area 21 of the second endless belt 6 is a gap 23 formed in which within the third endless belt 4 a nozzle bar 8th and within the second endless belt 6 a suction device 9 is provided, so that thereby the spunbond easily from the third endless belt 4 , which is used as a transfer belt, can be removed. By far this is on the inside of the run of the third endless belt 4 another suction device 12 and with a further distance on the outside of the strand a third suction device 13 provided the remaining liquid coming out of the nozzle bar 8th leaked, sucks. A good transfer of the fleece from the upper strand 4.5 of the endless belt 4 on the following volume 6 is improved depending on the product to be conveyed when the upper strand 6.2 ( 1 ) of the endless belt 6 on a sloping plane 14.1 runs (FIG. 1c ). Once the suction effect the suction device 7 wears off, the fleece can due to its own weight down on the endless belt 6 fall.

In the area of a Trum section 25 can be between the outer circumference of a sieve drum 19 and the Trum section 25 a gap S1 be provided so that the air can flow into this area, if at this point the suction device 12 should be effective. The gap S1 can be between 1 and 5 mm in size.

The Trum section 25 and 26 closes between itself and the vertically running strand 2.1 an acute angle γ1 or γ2, which may be between 5 ° and 60 °, preferably between 30 ° and 50 ° or between 38 ° and 48 °. The two angles γ1 and γ2 can be equal or different in size.

In the area of a Trumabschnitts 24 and in a gap 18 can be a fan 32 be provided that the detachment process of the web from the endless belt 5 accelerated. The fan 32 can work with a pressure between 3 and 100 bar in an advantageous manner between 5 and 80 bar or between 5 and 30 bar.

In 2 a second embodiment of the apparatus for solidifying a non-woven fabric formed from staple fibers or spunbonded nonwoven fabric is shown. The two in 2 illustrated endless belts 5 . 6 correspond to the in 1 illustrated endless belts 5 . 6 , In 2 is only part of the two endless belts 5 . 6 shown. Instead of the endless band 4 , which, as already mentioned, works as a transfer belt, is the screen drum 19 intended. The sieve drum or below as a suction drum 19 denotes a suction tube 7.1 auf, which is open in a range according to angle α.

At least on the outside of the run 2.1 Guided fiber web of the first and second endless belt 5 . 6 is also approximately in the same horizontal or inclined plane 14 guided, wherein the delivery area of the first endless belt 5 and the receiving area of the second endless belt 6 one strand section each 24 . 25 have, which lie on an inclined plane and thus form a funnel-shaped or V-shaped space in which at least a portion of the screen drum 19 is included.

The funnel-shaped or V-shaped space between the first and second endless belt 5 . 6 includes an angle β that is between 10 ° and 160 ° or between 40 ° and 120 ° or between 80 ° and 100 ° and in the V-shaped bulge are between 10% and 60% or between 20% and 50% or between 25% and 35% of the external volume of the screen drum 19 added.

The Trum sections 24 . 25 which lie on a respective inclined plane extending tangentially to the outside of the screen drum 19 , The Trum sections 24 . 25 the first and second endless belt 6 lying on the inclined plane are in this area over two or more spaced-apart guide rollers 26 . 27 guided, in which by the distance 18 of two adjacent guide rollers 26 . 27 formed gap of the second endless belt 6 the suction device 12 on the inside of the run 2.1 is provided. In the space 18 of the first endless belt, a nozzle bar can be provided.

In the area of the outside of the second endless belt 6 are located as in the embodiment according to 1 shown after the first out of the nozzle bar 8th and the suction device 9 formed needling device one or more needling devices, each consisting of one or more on the outside of the strand 2.1 provided nozzle beam 10 and one or more on the inside of the upper run 2.1 provided suction devices 11 consist. In the embodiment according to 2 two needling devices are shown.

The sieve drum 19 has the suction hood 7.1 with a large suction opening or with numerous suction openings in the angular range α, which are aligned or formed so that they are substantially in the delivery area 20 of the Trum section 24 and in the transition area 22 of the first endless belt 5 which lies on the inclined plane and / or partly also in the receiving area 21 of the second endless belt 6 unfold their suction.

The covering device or inner covering device of the screening drum 19 or the suction tube 7.1 can be arranged adjustable, so that the suction holes exactly on the run-piece section 24 , the transition area 22 and partly still on the area of the Trum section 25 can be aligned. This ensures that, especially in the transition area 22 the fleece adheres to the sieve drum. After this suction area α, the suction closes 12 on, the the detachment process of the web from the screen drum 19 supported.

The final part 7.8 of the suction box 7.1 ends according to 2a with a distance 31 in front of a narrowest point 3.3 between the outer circumference of the sieve drum 19 and the straight strand section 24 , The distance of the narrowest point 3.3 to the Ab circuit part 7.8 may be between 0 and 20 mm advantageously between 0 to 10 mm or between 0 and 5 mm or between 5 and 10 mm in size. The suction effect of the sieve drum 19 should use in this area, so that a perfect transfer between the endless belt 5 and the sieve drum 19 is guaranteed. Depending on the product, which is transported by the endless belt, the suction effect can also only behind the narrowest point 3.3 deploy. For this purpose, the suction pipe 7.1 also be designed adjustable.

The solidification of the spunbonded web by means of the hydrodynamic needling device takes place at the same height on the water-jet solidifying belt or endless belt 6 , The endless band 6 becomes like the endless band 5 over four or more guide rollers 2 tense led.

The endless band 6 is an endless fabric with an open surface of about 20%. It has no weld seam, so that no marks are formed on the spunbonded during solidification by means of water jets. The network of the spunbonded with water is done with low water pressure between 2 to 90 bar. These are on the outside of the strand 2.1 one or more nozzle bars 10 and one or more suction boxes opposite the nozzle bar 11 intended.

The needling of the filaments to entangle the spunbonded fabric takes place with the aid of the nozzle bars 10 with high energy between 10 to 250 bar. This first Wasservernadelungseinheit, which may also consist of several water-beam suction devices, may be followed by other units not shown in the drawing, which may also have needling drums.

For the transfer of the substantially unconsolidated spunbonded from the first designated as filing tape endless belt 5 to the downstream second endless belt 6 , which is referred to herein as a water-jet solidification belt, is carried out according to 1 with the help of the transfer endless belt 4 , The third endless band 4 is above the two endless belts 5 . 6 arranged.

The two endless ribbons 5 and 6 are with their lower strands 2.1 in the same direction as the lower run of the third endless belt 4 driven and also four guide rollers 2 tense led.

The lower workstring of the endless belt 4 is over the suction box 7 placed under suction at the top, so that the spunbonded fabric can be held at the bottom of the strand.

The guide rollers 2 are arranged so that the lower Arbeitstrum the transfer endless belt 4 at least partially over both the running area of the filing endless belt 5 and the receiving area of the hydroentangling belt 6 extends. The induced draft of the suction device 7 can also partly in the area of the filing endless belt 6 Act.

For the careful solution of the spunbonded fabric from the endless belt 4 is in the reception area 21 on the inside of the run 2.1 of the endless belt 6 , here also referred to as water needling tape, the water bar 8th and on the opposite side, on the inside of the run 2.1 of the second endless belt 6 , the suction device or the suction box 9 , so that a proper transfer of the spunbonded from the third endless belt 4 on the following endless band 6 or needling tape can be done.

It is advantageous if the water curtain formed by the nozzle bar and the resulting liquid from the transfer endless belt 4 with the help of the suction boxes 12 . 13 is sucked off. This will prevent liquid from entering the filing endless belt 5 is transmitted. This has the advantage that the sieve drum 19 over a larger angle α is covered by the spunbonded nonwoven.

The sieve drum 19 can also be stretched in the straight or on the level 14 guided endless belts 5 . 6 to be slightly pushed in to the induced draft in the transfer of the spunbonded from the receiving endless belt 5 on the delivery tape 6 to improve.

As in the area of the contact point of the sieve drum 19 with the straight Trumabschitt 24 . 25 the first and second endless belt 5 and 6 an open screen fabric is created, not through the screen drum 19 is covered, the suction air of the sieve drum 19 or the suction box 12 circulate freely, so that a proper transfer of the web from the first endless belt 5 to the sieve drum 19 or from the sieve drum 19 to the second endless belt 6 is possible without leaving nonwovens on the surface of the discharge side of the endless belt 5 or the surface of the sieve drum 19 remain. This also pinching in the region of the contact point between the discharge side of the endless belt 5 or the surface of the sieve drum 19 prevented in an advantageous manner.

1

Storage device Spinning tower for producing the filaments with a cooling chamber and a stretching unit

1.1

filament

2

deflecting

2.1

Trum

2.2

Deflection roller of the third endless belt 4

2.3

deflecting in the delivery area

2.4

deflecting in the delivery area

3

Pair of press rolls

3.3

tightest Job

4

third Endless belt, transfer endless belt, transfer element

4.1

Trum

4.2

lower Trum

4.5

Trum

5

first Endless belt, storage belt

5.2

Trum

6

second endless belt

6.2

Trum

7

suction device suction box

7.1

covering, Suction device, suction box, suction tube

7.8

final part the suction device

8th

Water bar, nozzle beam

9

suction, suction box

10

Water bar, Nozzle bar, water needling device with suction device

11

suction device Suction box, liquid suction device

12

suction, suction box

13

suction, suction box

14

Level, horizontal or inclined plane

14.1

inclined running plane

15

center line

16

distance

17

arrow

18

Distance, gap

19

screen drum

20

delivery area of the first endless belt

21

reception area of the second endless belt

22

dispensing, Recording, transition, transfer area

23

gap

24

Trum section

25

Trum section

26

deflecting

27

deflecting

28

Flüssigkeitsabsaugvorrichtung

29

suction device

30

arrow

31

distance

32

fan

32.1

Distance, gap

S1

gap

α

Angle, suction area of the sieve drum 19

β

Angle, inclined Trumabschnitte 24 . 25

γ1

Angle, between Trum section 24 and dream 2.1

γ2

Angle between Trum section 25 and dream 2.1

S

Fiber spunbond

M

meltblown

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 0418493 A [0002]
• WO 02/084006 A1 [0002]
• WO 02/50354 A [0002]
• WO 02/50356 [0002]
• WO 2006/000282 A [0002]
• - US 5141833 A [0002]
• - EP 1223135 A [0002]
• US 2006/02866887 [0003]

Claims (29)

Apparatus for consolidating staple fibers, microfibers or meltblown fibers or a spunbonded non-woven fabric formed from filaments, to which at least one deflection roller ( 2 ) guided first endless belt ( 5 ), on the filaments ( 1.1 ) by means of a storage device ( 1 ) and to the at least one further or second via the guide rollers ( 2 ), in the same direction as the first endless belt ( 5 ) driven endless belt ( 6 ), which is by far the first endless belt ( 5 ) and in their delivery and reception or transition area ( 22 ) at least a third conveying member (endless belt 4 , Sieve drum 19 ) with a suction device ( 7 . 7.1 ) is provided, characterized in that at least on an outside of a strand ( 2.1 ) guided fiber webs of the first and second endless belt ( 5 . 6 ) in one plane or in about the same plane ( 14 ) are guided or the guide rollers in the transfer area ( 22 ) of the first and second endless belts ( 5 . 6 ) in one plane or in approximately the same plane ( 14 ) or are arranged at approximately the same height. Apparatus for consolidating staple fibers, microfibers or meltblown fibers or a spunbonded non-woven fabric formed from filaments, to which at least one of the deflection rollers ( 2 ) guided first endless belt ( 5 ), on the filaments ( 1.1 ) by means of a storage device ( 1 ) and to the at least one further or second via the guide rollers ( 2 ), in the same direction as the first endless belt ( 5 ) driven endless belt ( 6 ), which is by far the first endless belt ( 5 ) and in their delivery and reception or transition area ( 22 ) at least a third conveying member (endless belt 4 , Sieve drum 19 ) with a suction device ( 7 . 7.1 ), characterized in that the strand further transporting the fibrous web ( 2.1 ) of the first and second endless belts ( 5 . 6 ) and the strand ( 4.1 ) of the further or third endless belt ( 4 ) parallel or approximately parallel to the plane or horizontally extending plane ( 14 ) are aligned. Apparatus according to claim 1, characterized in that the first and second endless belt ( 5 . 6 ) and / or the third endless belt ( 4 ) are formed as separate, separate bands. Apparatus according to claim 1, characterized in that the delivery area of the first endless belt ( 5 ) from the front portion of the third endless belt ( 4 ) and the receiving area of the second endless belt ( 6 ) from the rear portion of the third endless belt ( 4 ) is at least partially overlapped. Apparatus according to claim 1, characterized in that the strand further transporting the fibrous web ( 2.1 ) of the first and second endless belts ( 5 . 6 ) parallel to the horizontal or approximately horizontal or inclined plane ( 14 ) and to the down-facing strand ( 4.1 ) of the third endless belt ( 4 ) are arranged. Apparatus according to claim 1, characterized in that within the third endless belt ( 4 ) and in the transfer area ( 22 ) of the first and second endless belts ( 5 . 6 ) the suction device ( 7 ) is arranged. Device according to claim 1, characterized in that the endless belts ( 4 . 5 . 6 ) are each formed as a screen belt. Apparatus according to claim 1, characterized in that between a deflection roller ( 2.2 ) in the delivery area of the third endless belt ( 4 ) and a recording area ( 21 ) of the second endless belt ( 6 ) a gap ( 23 ) within which within the third endless belt ( 4 ) a nozzle bar ( 8th ) and within the second endless belt ( 6 ) a suction device ( 9 ) is provided. Apparatus according to claim 1, characterized in that in the region of the outside of the second endless belt ( 6 ) between the first one from the nozzle bar ( 8th ) and the suction device ( 9 ) needling device one or more needling devices (nozzle bar 10 , Suction device ( 11 ) are provided. Apparatus for consolidating staple fibers or a spunbonded non-woven fabric formed from filaments, to which at least one over the deflecting rollers ( 2 ) guided first endless belt ( 5 ), on which the filaments ( 1.1 ) with the help of the storage device ( 1 ) and to the at least one further or second via the guide rollers ( 2 ), in the same direction as the first endless belt ( 5 ) driven endless belt ( 6 ), which is by far the first endless belt ( 5 ) and in their delivery and reception or transition area ( 22 ) at least a third conveying member in the form of a sieve drum ( 19 ) with a suction device ( 7 ), wherein the following or second endless belt ( 6 ) at least one of the nozzle bars ( 10 ) and the suction device ( 11 ) associated with water needling device, characterized in that at least on the outside of the strand ( 2.1 ) guided fiber web of the first and second endless belt ( 5 . 6 ) in about the same level ( 14 ), wherein the delivery area of the first endless belt ( 5 ) and the receiving area of the second endless belt ( 6 ) each a Trum section ( 24 . 25 ), which are on a sloping plane lie and thus form a funnel-shaped or V-shaped space in which at least a part of the sieve drum ( 19 ) is recorded. Apparatus according to claim 10, characterized in that the funnel or V-shaped space between the first and second endless belt ( 5 . 6 ) includes an angle β which is between 20 ° and 160 ° or between 40 ° and 120 ° or between 80 ° and 100 ° and that in the V-shaped recess between 10% and 60% or between 20% and 50% or between 25% and 35% of the external volume of the screening drum ( 19 ) are included. Apparatus according to claim 10, characterized in that the strand sections ( 24 . 25 ) lying on a respective inclined plane, tangent to the outside of the screen drum ( 19 ). Apparatus according to claim 10, characterized in that the strand sections ( 24 . 25 ) of the first and second endless belts ( 6 ) lying on the inclined plane, in this area over two or more spaced-apart guide rollers ( 26 . 27 ) are guided, wherein in a by the distance of the two adjacent guide rollers ( 26 . 27 ) formed intermediate space ( 18 ) of the second endless belt, a suction device ( 12 ) on the inside of the strand ( 2.1 ) is provided. Apparatus according to claim 10, characterized in that the sieve drum ( 19 ) the suction hood ( 7.1 ) with a large suction opening or with numerous suction openings in the angular range (α), which are aligned or formed so that they are substantially in a delivery area ( 20 ) of the Trum section ( 24 ) and in the transitional area ( 22 ) of the first endless belt ( 5 ) and / or partially in the reception area ( 21 ) of the second endless belt ( 6 ) unfold their suction. Device according to claim 10 or 14, characterized in that the sieve drum ( 19 ) the cover device or inner cover device ( 7.1 ), which is arranged such that only in the delivery area ( 20 ) or in the area of the Trum section ( 24 ) of the first endless belt ( 5 ), which lies on the inclined plane, creates a suction effect. Device according to claim 10 or 14, characterized in that the sieve drum ( 19 ) the cover device or inner cover device ( 7.1 ) whose suction opening or suction section in the direction of the delivery area ( 20 ) or in the area of the Trum section ( 24 ) of the first endless belt ( 5 ), which lies on the inclined plane, is adjustable. Apparatus for producing a pure spunbonded nonwoven of endless filaments and for consolidating this spunbonded nonwoven by means of hydrodynamic needling, consisting of a) a spinning tower for producing the filaments with a cooling chamber, a drawing unit and a filament depositing unit, the filament depositing unit being made of the sieve-shaped tray transporting the spunbonded nonwoven web Endless Tape ( 5 ) between at least two rollers ( 2 ) is tightly guided and deflected, and in the storage area ( 20 ) below the endless belt ( 5 ) a suction device ( 29 ) is provided; b) the endless belt ( 5 ) following, separate circumferential, permeable device (endless belt 6 ) for pre-needling and / or needling of the spunbonded web, including the working strand ( 2.1 ) of the device over the working width for meshing and / or needling at least one nozzle bar ( 10 ) with the suction device ( 11 ), wherein the suction device ( 11 ) below the track ( 2.1 ) is located; c) the sieve-shaped transfer unit ( 4 . 19 ), the two endless belts ( 5 . 6 ) overlaps or at least partially overlaps and further transports the spunbonded nonwoven web, wherein the nonwoven spunbonded web is removed from the leading endless belt ( 5 ) and when transferring to the following endless volume ( 6 ) alone on the lower outside of the endless belt ( 4 ) is held. Device according to claim 2, characterized in that the suction device ( 7 ) for holding the spunbonded web on the outside of the third endiosband ( 4 ) on the inside thereof in the transfer area ( 22 ) of the two endless belts ( 5 . 6 ) is provided and this unfolds a suction pressure. Device according to claim 1 or 2, characterized in that the sieve drum ( 19 ) is driven in the same direction as the runs of the endless belts ( 4 . 5 . 6 ), which are on the horizontal plane 14 are arranged. Device according to one of the preceding claims, characterized in that the spunbonded nonwoven web in the transfer to the endless belt, which as Vernadelungsendlosband ( 6 ) is formed, with the aid of one or more suction devices ( 9 . 11 ) is set under induced draft. Device according to one of the preceding claims, characterized in that the spunbonded nonwoven web during transfer to the Vernadelungsendlosband ( 5 ) with the help of one or more overpressure devices (nozzle bars 10 ) is applied. Device according to Claim 21, characterized in that the overpressure device is in the form of a blowing device or a water needling jet ( 10 ) is trained. Apparatus according to claim 21, characterized in that the water needle jet bar ( 10 ) the liquid suction device ( 11 ) assigned. Apparatus for consolidating staple fibers, microfibers or meltblown fibers or a spunbonded nonwoven fabric formed from filaments, to which at least one deflection roller ( 2 ) guided first endless belt ( 5 ), on the filaments ( 1.1 ) by means of a storage device ( 1 ) and to the at least one further or second via the guide rollers ( 2 ), in the same direction as the first endless belt ( 5 ) driven endless belt ( 6 ), which is by far the first endless belt ( 5 ) and in their delivery and reception or transition area ( 22 ) at least a third conveying member (endless belt 4 , Sieve drum 19 ) with a suction device ( 7 . 7.1 ) is provided, characterized in that at least two guide rollers ( 2.3 and 2.4 ) of the two endless belts ( 5 . 6 ) in the transition area ( 22 ) at the same height or level ( 14 ), the two levels ( 14 ) of Trums ( 5.2 . 6.2 ) of the first and / or second endless belt ( 5 . 6 ) each on an inclined plane or only the run of the second endless belt ( 6 ) may be arranged on an inclined or only partially extending plane. Device according to claim 1 or 24, characterized in that the lower strands 5.2 and 6.2 the two adjacent endless bands 5 . 6 in the direction of the endless belt or transfer endless belt 4 be moved up so that the two strands 5.2 . 6.2 between the guide rollers 2.3 . 2.4 in the delivery area on a straight line before and after the guide rollers 2.3 . 2.4 on a sloping plane 14.1 run. Apparatus according to claim 1 or 24, characterized in that in the region of the strand section 24 between the outer circumference of the sieve drum 19 and the Trum section 24 a gap S1 is provided, so that air can flow into this area. Apparatus according to claim 1 or 24, characterized in that in the region of the strand section ( 25 ) a blower ( 32 ) is provided. Apparatus according to claim 1 or 24, characterized in that a final part ( 7.8 ) of the suction box ( 7.1 ) with a distance ( 32.1 ) before or after a narrowest point ( 3.3 ) between the outer circumference of the screening drum ( 19 ) and the straight strand section ( 24 ) ends. Device according to claim 1 or 28, characterized in that the end part ( 7.8 ) of the suction box ( 7.1 ) with the distance ( 32.1 ) before or after the narrowest point ( 3.3 ) between the outer circumference of the screening drum ( 19 ) and the straight strand section ( 24 ), whereby the distance of the narrowest point ( 3.3 ) to the final part 7.8 between 0 and 20 mm may advantageously be between 0 to 10 mm or even between 0 and 5 or between 5 to 10 mm.