EP3993974A1 - Device and method for transporting a nonwoven - Google Patents

Abstract

The invention relates to a device and a method for transporting a nonwoven, having two endlessly circulating belts, preferably during the production of composite boards from a spread pressed-material mat, wherein, in the device for transporting a nonwoven (1), a first belt (3) and a second belt (4) are arranged such that the underside (12) of the nonwoven (1) is transported in a transporting direction (10) in a manner resting on the belts (3, 4), and wherein a transfer gap (9) is formed between the first and the second belt, characterized in that a transfer device (2) for transporting the nonwoven (1) is arranged in the region of the transfer gap (9). The invention also relates to a method for starting up or shutting down such a device.

Description

Device and method for transporting a fleece

The invention relates to a device for transporting a fleece with two endlessly rotating belts, preferably in the course of the production of

Material plates made from a sprinkled mat of pressed material according to the preamble of claim 1.

The invention further relates to a method for transporting a fleece with two endlessly rotating belts, preferably in the course of the production of

Material plates made from a sprinkled mat of pressed material according to the preamble of claim 14.

The invention also relates to a method which is particularly suitable for special cases, such as starting up and shutting down a production line, after

Claim 31.

In the production of material panels from scatterable materials, a material, usually a mixture of particles or fibrous substances and a binding agent, is scattered to form a grit mat on a molding or conveyor belt, the grit mat then possibly requiring one

Pretreatment and finally a compression is fed.

The compression can be carried out continuously or discontinuously by means of pressure and heat. As a rule, these are chipboard, fiber or chipboard panels. The scattering takes place in one or more layers, as required, the need for several layers usually occurring in the production of thicker panels. Almost all types of production have in common that, for technological reasons, at least one transition between two belts transporting the fleece is necessary before the fleece can be introduced into a press. Examples would be transitions from a forming belt to a pre-pressing or a

Preheating tape. Forming belts are usually very long and connect several spreading machines until the structure of the fleece is created. Pre-press or preheating belts require different properties such as

- high strength during pre-compression or

- Permeability with pneumatic preheating or

- Microwave permeability.

It is therefore technologically sensible and cheaper to separate expensive special areas from the molding area with regard to the belts.

From EP 1 782 933 B1 a method and a device for producing material panels from a fleece are known, in which defective

Fleece areas are disposed of in a chute and, if necessary, recycled. For this purpose, a transfer gap is provided between two transporting belts, which is enlarged by a reversing belt nose in the event that a defective mat is dropped. In normal operation, the

Transfer gap kept as small as possible.

From EP 2 247 418 B1 is a method and a device for

Preheating of a pressed material mat has become known, which also provides a transition between two transporting belts for a fleece. This is arranged here between a forming area for creating the fleece and a microwave preheating.

It is therefore disadvantageous in the known systems or transport areas that the fleece has to pass at least one transition between two endlessly circulating forming belts. The risk for production is that parts of the fleece could break off or fall off and in the transfer gap disappear. In addition, the lower or the surface can be damaged during the transition if the mat is deformed too much or sags. Usually the radii of the pulleys are kept as small as possible. But this is a balance between two disadvantages. If the radius of the pulley is too small for the belt, it wears out faster. If the radius is too large, the transition is too wide and the fleece is damaged.

The object of the present invention is to provide a device and a method with which it is possible to minimize or avoid the above-mentioned disadvantages. In particular, it should be possible to overcome not only small transitions but also larger transitions with little effort and as little risk as possible for the fleece.

In an extension of the task it should be possible in the

Transfer device to integrate at least one further technologically meaningful or necessary process step in the production of nonwovens or their pressing into material panels.

Apart from these possibilities, it is also possible with the newly created device and the method to create a passage switch that is capable of between the further transport of usable fleece and the discharge of unusable fleece into a waste chute

to switch.

The invention is based on a device for transporting a fleece with two endlessly revolving belts, which is preferably used in the course of the production of material panels from a scattered pressed material mat, a first belt and a second belt being arranged in this way in the device for transporting a fleece that the underside of the fleece is transported lying on the belts in the transport direction and a transfer gap is formed between the first and the second belt. The object is achieved for the device in that a transfer device for transporting the fleece in the area of the

Transfer gap is arranged.

It is particularly preferred that the transfer device is arranged on one surface side of the fleece and the two belts for

Transport on the other surface side of the fleece.

The invention understands the device essentially as a flat or horizontal transport in one plane, the fleece changing from one belt to the next and the transporting surfaces of the belts preferably being arranged in the same plane. Since the fleece is sensitive to kinks or bending, only a small difference in height can be overcome if the second belt is arranged higher or lower.

This difference in height is preferably not greater than the height of the

corresponding fleece.

The following possible alternative design features can be used together, separately or in any combination according to the invention.

An endlessly revolving and permeable transfer belt with an associated vacuum device for sucking the top of the fleece through the transfer belt can preferably be arranged as the transfer device on the top side of the fleece.

Alternatively or cumulatively, the transfer belt can be arranged to cover the transfer gap and at least partially the first belt and / or the second belt. Under covering is understood here according to the teaching as such that at least partially both surface sides of the

Transfer device and a belt are accompanied or guided or In terms of the system, one or both belts overlap with the transfer device.

The first belt and the second belt could be arranged for transport in the same or in a different transport plane.

The drives for the belts and the transfer belt could preferably be arranged in a synchronized manner for a uniform speed in the transport direction, preferably via a control device. Such a one

Control device may be provided in the overall system control or even in the device itself as a direct control device for the device and / or for implementing the method or a program sequence.

In a further alternative, a spray device for wetting the underside and / or the upper side of the fleece, preferably with water, can be arranged before, after and / or in the transfer gap.

A heating device, preferably a pneumatic heating device with steam and / or hot air, for the fleece can also be arranged in the transfer gap or within one of the endlessly circulating transporting belts.

In a further possible embodiment, in the transport direction before the transfer gap on the first belt, after the transfer gap on the

Transfer belt and / or means for separating the fleece from the corresponding belt are arranged in the transfer gap itself, these means preferably being vibration and / or compressed air devices.

Alternatively or cumulatively, the following features can be used: - A cleaning device for the transfer belt;

- In or in the transport device in front of the transfer gap a device for determining foreign bodies;

- Below the transfer gap a collecting device for the fleece, in particular for disposal and / or return at the beginning of the process;

- A prepress to compress the fleece, preferably before

Transfer gap;

- A control device for processing a signal from the

Device for the detection of foreign bodies, which is suitable for switching off or switching over the

To effect transfer device for diverting the fleece into the collecting device.

The transfer device and / or the vacuum device can be arranged so as to be movable in their distance from the belts and / or in or against the transport direction.

- The vacuum device can be divided transversely and / or longitudinally to the transport direction into differentially adjustable vacuum zones, these

Vacuum zones are preferably movable in and / or against the transport direction. Most preferably these can be moved independently of one another.

- The contact surface of the vacuum device with the transfer belt can be arranged flat, arched and / or concave in or across the transport direction.

- A monitoring device for monitoring the occupancy of the

The transfer belt with the fleece or the fleece quality can be arranged, preferably before and / or after the transfer device or in the transfer gap. On the procedural side, too, the solution to the problem for a method contains a multitude of features worth combining, which alone or in any combination with one another can improve the device and the method according to the teaching of the invention.

The solution for the method for transporting a fleece with two endlessly revolving belts, preferably in the course of the production of material panels from a scattered pressed material mat, consists in the fact that one

Transfer device transports the fleece in the area of the transfer gap.

Alternatively or cumulatively, the following procedural features can be used in a possible embodiment:

- In the transfer device, the top of the fleece is through a

Vacuum device held on an endlessly revolving and permeable transfer belt at least in the area of the transfer gap;

the fleece is preferably sucked while lying on the first belt and / or over the second belt;

- The fleece is transferred from the first belt to the second belt in the same or a different transport plane;

- The belts and the transfer belt are moved at the same speed in the transport direction;

- Before, after and / or in the transfer gap, the bottom and / or the top of the fleece are wetted, preferably with water;

- In the transfer gap and / or through the belts, steam and / or hot air are applied to the fleece:

- before the transfer gap on the first band, after the transfer gap on the

Transfer belt and / or in the transfer gap, the fleece is actively separated from the corresponding belt, preferably vibration and / or

Compressed air devices are used for active separation;

- the transfer belt is cleaned in the return;

- In or in the transport device in front of the transfer gap, the fleece is on Foreign bodies checked;

- In exceptional cases, the fleece is transferred to a

Hand over the collecting device and reused if necessary;

the fleece is compressed, preferably in front of the transfer area;

- After determining foreign bodies, the transfer device

is switched off and the fleece is diverted into the collecting device, preferably until no foreign bodies can be detected for a predetermined time.

- the transfer device and / or the vacuum device can be moved in their distance from the belts and / or in or against the transport direction depending on the operating state.

- The vacuum device can be divided transversely and / or longitudinally to the transport direction into differentially adjustable vacuum zones, these

Vacuum zones can preferably be moved in and / or against the transport direction, most preferably independently of one another.

- The contact surface of the vacuum device can guide the transfer belt flat, curved and / or concave in or across the transport direction.

- Using a monitoring device, the occupancy of the

Transfer belt with the fleece or the fleece quality, preferably before and / or after the transfer device or in the transfer gap, monitored.

In a particularly preferred and created method, the task for starting and stopping a production is achieved as follows:

For the transport of a fleece with two endlessly revolving belts, preferably in the course of the positioning of material panels from a spread

Press material mat or a fleece, the underside of the fleece being transported in the transport direction resting on the first belt and the second belt and a transfer gap being passed between the first and the second belt and the transfer device in the

Top of the fleece by a regulated or unregulated Vacuum device is held on an endlessly revolving and permeable transfer belt at least in the area of the transfer gap, the method is characterized by the following method steps:

the fleece lying with its lower surface side on the first belt (3) is on the upper surface side in the transport direction (10) with the

Brought into contact with the transfer belt,

after reaching the vacuum device (6) on the fleece (1)

on the opposite side of the transfer belt (5), a negative pressure is applied to the fleece,

the fleece leaves the first belt, is affected by the negative pressure

The transfer belt is held and transported over the second belt and after reaching the second belt, the vacuum on the fleece is reduced until the fleece comes to rest on the second belt and the transfer belt can lift off the surface of the fleece.

To improve the process when starting up, the distance to build up the negative pressure on the first belt can be extended

Transfer device and / or the vacuum device are moved against the transport direction and / or to reinforce the

Vacuum build-up, the transfer device and / or the first belt are moved towards each other, with the transfer device and / or the vacuum device being moved again in the transport direction once the fleece has sufficiently adhered to the transfer belt,

preferably until the fleece can be properly deposited on the second belt.

To improve the process during shutdown, the negative pressure in the transfer device can be switched off and at the same time the transfer device and / or the negative pressure device can be moved against the transport direction. Alternatively or cumulatively, the vacuum device can be switched on or off in and / or transversely to the transport direction in sections depending on the occupancy of the transfer belt with fleece.

Other advantages and general benefits are:

In an advantageous manner, it is now possible in the production of thin sheets of less than 12 mm, preferably thinner than 7 mm and most preferably in the production of thin sheets of less than 4 mm thickness, a transition of the not yet pressed fleece, also called pressed material mat, from One conveyor belt to another conveyor belt to ensure that production is not essentially affected by the transition. Surface defects, cracks or other damage can almost be ruled out. Essentially all technologically-related transitions in the production of fleeces or pressed material mats come into question, especially when using lignocellulosic materials in MDF, TFIDF, HDF, PB manufacturing. But even when using OSB residues, recycling materials, plastics, straw, rice, textiles, cellulose and mixtures thereof, there are advantages in the application of the invention.

In a further advantageous embodiment, it is now even possible

Compensate for fleas differences between a first and a second band. This may be particularly useful if the entire molding strand for the lowering position of the pressed material mat is arranged on one level and a change in the transport level appears to be necessary for certain applications. This may be necessary if the transfer belt for transferring the fleece to a press reaches its limits with regard to its height adjustability or if the center of the fleece is to be adjusted by its transport plane when it is preheated with a microwave. It is now advantageously possible in an inventive

Transfer device to integrate at least one further technologically meaningful or necessary process step or a corresponding device in the production of nonwovens or their pressing to form material panels. A possible process step or device could be:

- Preheating with steam

- Detection of foreign material

- Separation of defective fleece areas

- Moistening of the lower and / or upper surface

- Pre-compression before and / or after the transfer gap

The following features are also suitable for further developing the teaching of the invention individually and / or in combination with the other features listed above.

It is irrelevant whether these are used for process engineering or vice versa for plant engineering:

- The transfer device and / or the vacuum device are designed to be movable in height or parallel to the fleece.

The transfer device and / or the vacuum device are adjustable in height, preferably different heights can be set on the inlet / outlet side. Different geometries can preferably be set, e.g. a narrowing gap or an opening gap.

- The vacuum device can be across the width in height

can be set differently.

- The transfer belt is reversible, or forwards and backwards

mobile.

The vacuum zone of the negative pressure device can be divided into several zones, which can be switched on / off individually as well as switched to atmosphere and / or subjected to overpressure. - The vacuum zone of the vacuum device can consist of two or more units which can be moved independently of one another.

- In the inlet and outlet area of the vacuum unit

Monitoring devices for the detection of product breaks can be arranged. This is used to detect missing fleece in the inlet or a doubling of the fleece because the fleece has only partially detached from the transfer belt.

- The transfer device and / or the vacuum device can

(one-sided) moved sideways (e.g. adjusting the product flow) or inclined in the production direction.

- The vacuum device or its effectiveness can be varied in width and length by devices (e.g. metal sheets).

- The vacuum box can be designed to be infinitely variable in width and length (adjust dimensions).

- The running surface of the vacuum box can be longitudinal and / or

Transverse direction be flat and / or arched and / or concave (sealing effect or compensation for loss of density in the edge area).

- The speed of the vacuum belt can be independent of the

rest of the molding strand can be adjusted in speed

(provoke a material tear in the event of an emergency stop.

- Sequential activation and deactivation of vacuum zones.

- Execution of the "band nose" as a perforated body to

To improve vacuum application.

- Execution of the "band nose" as a profiled body to

To improve vacuum application. (e.g. diamond pattern)

- Belt nose with a larger diameter to prevent belt wear

minimize.

- Tape guidance possible at an obtuse angle (no classic tape nose).

- The vacuum belt unit can rest on the product both without pressure and with active pressure. - At the end of the vacuum unit there can be a device for removing the product and / or cleaning the belt, for example

- - Blow molding

- - Swing bar

- - ionization bar

- Under the vacuum zone (flat belt & press lower belt) there can be a mechanical unit for forced removal of the product, e.g. B. a scraper.

- Use of a scraping edge to produce a defined product edge of the fleece for further transport towards the press.

- At the end of the molding belt, the same devices can be used for

Detachment of the product and / or cleaning of the belt, e.g. a blow table to remove products from the belts or the

To release transfer belt.

- In the inlet area of the vacuum belt there can be a release agent application device to minimize buildup on the vacuum belt or to apply release agent for the pressing.

- The previous transfer roller or belt nose can be designed to be rigid or movable. (e.g. protection of the molding belt in the event of a molding strand stop)

- The pulleys of the belts can be moved in height at the transfer gap.

- A cleaning unit (e.g. suction funnel and / or cleaning brush) can be present in the inlet area as a reject or

Miscarriage.

- Edge cleaning of the belts or the transfer belt can

preferably be arranged in the area of the vacuum zone.

- The transfer belt can be equipped in the edge area with additional static and / or concurrent sealing devices, eg a circumferential sealing collar. Further advantageous measures and embodiments of the subject matter of the invention emerge from the dependent claims and the following description with the drawing.

Show it:

Figure 1 is a schematic side view of the invention

Device idling,

FIG. 2 shows the view according to FIG. 1 with the transport of a fleece in FIG

Transport direction and

3 shows the view according to FIG. 1 or 2 while the fleece is being thrown into the collecting device.

The drawing shows a device according to the invention for transporting a fleece 1 along a transport direction 10. The same reference numerals designate the same device features, each figure corresponds to a different possible embodiment and show separate operating states such as idle (Figure 1), normal operation (Figure 2) and exceptional operation (Figure 3).

In Figure 1, a device for transporting a fleece with two endlessly revolving belts 3, 4 without the fleece to be transported is shown in a schematic side view. The belts 3 and 4 are essentially in one plane and form a transfer gap 9 between them, through which the fleece must be transported. The transfer gap 9 can be made as small as possible and the illustrated collecting device 8 is only an optional possibility of incorporating a further method step into the transfer area. The invention is preferably used in order to overcome short transitions gently for the fleece 1.

In the embodiment shown, there is a possibility of ejection if, for example, the fleece 1 is not transported further with the belt 4 shall be. As a transfer device 2, for overcoming the transfer gap 9, a transfer belt 5 endlessly revolving around pulleys 16 is arranged above the bands 3 and 4, which also endlessly revolve over

Deflection rollers 16 are guided. The transfer belt is at least in

Transfer area 9 parallel to the surface of the fleece 1 and the

opposite belts 3, 4 and their transport plane out. The transport plane is preferably understood to mean the plane in which the underside 12 of the fleece 1 is guided.

There are also various optional devices in the

Transfer device 2 or for the belts 3 and 4. These could

Spray devices 14 for spraying the top side 11 or the bottom side 12 of the fleece 1. A heating device 15 can be arranged, which is preferably arranged inside the first belt 3. The belt 3 can be made permeable for the injection of thermal elements such as steam or hot air. Means for separating 7 the fleece 1 from the belts 3, 4 or the transfer belt 5 can also be arranged. These would be vibration devices or compressed air nozzles, for example. These can act not only passively but also actively, for example, be arranged in the transfer gap 9 itself. Instead of or with the

Wetting nozzles 14.

In FIG. 2, a fleece with its upper side 11 and lower side 12 is passed through the device and is lifted off the belt 3 by means of the vacuum device 6, which can act through the permeable transfer belt 5, and is transported floating over the transfer gap 9.

Then the fleece 1 is transferred from the transfer belt 5 to the second belt 4 and, if necessary, detached from the transfer belt 5 with the means for separating 7. In the return, the transfer belt 5 is then in a

Cleaning device 13 cleaned before it comes into contact again with the next area of the fleece 1 via the deflection rollers 16. In an advantageous manner, various process aspects can now also be accommodated in this area, as a result of which a corresponding system can be made shorter or improved if necessary.

In FIG. 3, for example, a prepress 17 is arranged which compresses the fleece 1 before it is lifted off the belt 3 so that it can be transported more gently.

In the figure 3 is also shown that when switching off the

Transfer device 2, the fleece can be thrown into a collecting device 8 in order to either be disposed of or used again later.

Claims

Claims 1. Device for transporting a fleece with two endlessly rotating belts, preferably in the course of the production of material panels from a scattered pressed material mat, wherein in the device for Transport of a fleece (1) a first belt (3) and a second belt (4) are arranged in such a way that the underside (12) of the fleece (1) is transported in the transport direction (10) resting on the belts (3, 4) and wherein a transfer gap (9) is formed between the first and second belt, characterized in that a transfer device (2) for transporting the fleece (1) is arranged in the area of the transfer gap (9). 2. Device according to claim 1, characterized in that in the transfer device (2) on the top (11) of the fleece (1) an endlessly revolving and permeable transfer belt (5) with an associated regulated or unregulated vacuum device (6) for suction of the Top (12) of the fleece (1) through the Transfer belt (5) is arranged. 3. Device at least according to one of the preceding claims, characterized in that the transfer belt (5) the Transfer gap (9) and at least partially the first band (3) and / or the second band (4) is arranged covering. 4. Device at least according to one of the preceding claims, characterized in that the first belt (3) and the second belt (4) are arranged for transport in the same or in a different transport plane. 5. The device at least according to one of the preceding claims, characterized in that the drives of the belts (3, 4) and the transfer belt (5) for a uniform speed in the transport direction (10), preferably via a control device, synchronized and / or independent of one another are controllably arranged. 6. Device at least according to one of the preceding claims, characterized in that before, after and / or in the transfer gap (9) a spray device (14) for wetting the underside (12) and / or the upper side (11) of the fleece (1) , preferably with water, is arranged and / or that in the transfer gap (9) or within one of the endless A heating device (15), preferably a pneumatic heating device with steam and / or hot air, for the fleece (1) is arranged around the circulating transporting belts (3, 4). 7. Device at least according to one of the preceding claims, characterized in that in the transport direction (10) in front of the transfer gap (9) on the first belt (3), after the transfer gap (9) on the transfer belt (5) and / or in the transfer gap (9 ) even means for separating (7) the fleece from the corresponding band are arranged, these means preferably vibration and / or Compressed air facilities are. 8. Device at least according to one of the preceding claims, characterized in that a cleaning device (13) for the transfer belt (5) and / or that a device for determining foreign bodies is arranged in or in the transport device (10) in front of the transfer gap (9). 9. The device at least according to one of the preceding claims, characterized in that a collecting device (8) for the fleece is arranged below the transfer gap (9). 10. The device at least according to one of the preceding claims, characterized in that a pre-press (17) is arranged. 11. The device at least according to one of the preceding claims, characterized in that a control device for processing a signal from the device for determining foreign bodies is arranged, which is suitable for a corresponding signal to switch off or switch Transfer device (2) for diverting the fleece (1) into the To effect catching device (8). 12. The device at least according to one of the preceding claims, characterized in that the transfer device (2) and / or the vacuum device (6) can be moved in their distance from the belts (3, 4) and / or in or against the transport direction (10) is arranged. 13. Device at least according to one of the preceding claims, characterized in that the negative pressure device (6) is divided transversely and / or longitudinally to the transport direction (10) into differentially adjustable negative pressure zones, these negative pressure zones preferably in and / or against the transport direction (10) movable, highest are preferably arranged to be movable independently of one another. 14. The device at least according to one of the preceding claims, characterized in that the contact surface of the The vacuum device (6) with the transfer belt (5) is arranged flat, curved and / or concave in or transverse to the transport direction (10). 15. The device at least according to one of the preceding claims, characterized in that a monitoring device for monitoring the occupancy of the transfer belt (5) with the fleece (1) or the fleece quality, preferably before and / or after Transfer device or in the transfer gap, is arranged. 16. A method for transporting a fleece with two endless belts, preferably in the course of the production of material panels from a scattered pressed material mat, the underside (12) of the fleece (1) on the first belt (3) and the second belt (4) supported in the transport direction (10) and a transfer gap (9) is passed between the first and the second belt, characterized in that a transfer device (2) transfers the fleece (1) in the area of the transfer gap (9) over the transfer gap (9) ) transported. 17. The method according to claim 14, characterized in that in the transfer device (2) the top (11) of the fleece (1) by a regulated or unregulated vacuum device on an endlessly revolving and permeable transfer belt (5) at least in the area of the transfer gap (9 ) is held. 18. The method according to at least one of the preceding Method claims, characterized in that the fleece (1) is sucked in lying on the first belt (3) and / or above the second belt (4). 19. The method according to at least one of the preceding Method claims, characterized in that the fleece (1) is transferred from the first belt (3) to the second belt (4) in the same or a different transport plane. 20. Method according to at least one of the preceding Method claims, characterized in that the belts (3, 4) and the transfer belt (5) with the same and / or independently of one another with differentiated or opposite Speeds parallel or in the transport direction (10) are moved. 21. The method according to at least one of the preceding Method claims, characterized in that before, after and / or in the transfer gap (9) the underside (12) and / or the upper side (11) of the fleece (1) are wetted, preferably with water, and / or that in the transfer gap (9) and / or through the belts (3, 4), steam and / or hot air is applied to the fleece. 22. The method according to at least one of the preceding Method claims, characterized in that before the transfer gap (9) on the first belt (3), after the transfer gap (9) on the transfer belt (5) and / or in the transfer gap (9) the fleece is actively separated from the corresponding belt, preferably Vibration and / or compressed air devices are used for active separation. 23. The method according to at least one of the preceding Method claims, characterized in that the Transfer belt (13) cleaned and / or in the return that the fleece is checked for foreign bodies in or in the transport device (10) in front of the transfer gap (9). 24. The method according to at least one of the preceding Method claims, characterized in that in In exceptional cases, the fleece in the transfer gap (9) to a Collecting device (8) is passed. 25. The method according to at least one of the preceding Method claims, characterized in that the fleece is compressed, preferably before the transfer area (9). 26. Method according to at least one of the preceding Method claims, characterized in that according to Determination of foreign bodies the transfer device (2) is switched off and the fleece (1) is diverted into the collecting device (8), preferably until a predetermined time Foreign bodies can be determined more. 27. The method according to at least one of the preceding Method claims, characterized in that the Transfer device (2) and / or the vacuum device (6) can be moved in their distance from the belts (3, 4) and / or in or against the transport direction (10) depending on the operating state. 28. Method according to at least one of the preceding Method claims, characterized in that the The vacuum device (6) is divided transversely and / or longitudinally to the transport direction (10) into differentially adjustable vacuum zones, these vacuum zones preferably in and / or against the Transport direction (10), most preferably be moved independently of one another. 29. V Method according to at least one of the preceding Method claims, characterized in that the transfer belt (5) is guided flat, arched and / or concave in or across the transport direction (10) through the contact surface of the vacuum device (6). 30. The method according to at least one of the preceding Method claims, characterized in that the occupancy of the transfer belt (5) with the fleece (1) or the fleece quality, preferably before and / or after the transfer device or in the transfer gap, is monitored by means of a monitoring device. 31. A method for transporting a fleece with two endlessly revolving belts, preferably in the course of the production of material panels from a scattered pressed material mat, the underside (12) of the fleece (1) lying on the first belt (3) and the second belt (4) is transported in the transport direction (10) and a transfer gap (9) is passed between the first and the second belt wherein in the transfer device (2) the upper side (11) of the fleece (1) is held by a regulated or unregulated vacuum device on an endlessly revolving and permeable transfer belt (5) at least in the area of the transfer gap (9), characterized by the following process steps: - the fleece (1) lying with its lower surface side on the first band (3) is on the upper surface side in Transport direction (10) brought into contact with the transfer belt (5), - After reaching the vacuum device (6) on the side of the transfer belt (5) facing away from the fleece (1), a vacuum is applied to the fleece (1), - The fleece (1) leaves the first belt (3), is held by the negative pressure on the transfer belt (5) and transported over the second belt (4), - After reaching the second belt (4) the vacuum on the fleece is reduced until the fleece (1) comes to rest on the second belt (4) and the transfer belt (5) can lift off the surface of the fleece. 32. The method according to claim 31, characterized in that when starting to extend the path to build up the negative pressure in the first belt (3), the transfer device (2) and / or the The vacuum device (6) is moved against the transport direction and / or that the transfer device (2) and / or the first belt (3) are moved towards one another to increase the vacuum build-up, whereby after the web (1) adheres sufficiently to the transfer belt ( 5) the transfer device (2) and / or the vacuum device (6) is moved again in the transport direction, preferably until the fleece (1) can be properly deposited on the second belt (4). 33. The method according to claim 31, characterized in that when Shutting down the negative pressure in the transfer device (2) is switched off and at the same time the transfer device (2) and / or the negative pressure device (6) is moved against the transport direction. 34. The method according to claim 31, characterized in that the Vacuum device (6) in and / or transverse to the transport direction (10) in sections depending on the occupancy of the Transfer belt (5) with fleece (1) is switched on or off.