EP1479821A2 - Web guiding and/or sealing device - Google Patents

Abstract

A papermaking assembly has an airturn guide rod (10) also operating as a seal. The rod emitts compressed air through its porous surface to form an air cushion between the rod and a wet moving paper or carton web. The airturn rod guide is located after a machine press, press arrangement or press section, and/or prior to an air drier e.g. an impingement drier. The rod-shaped guide has an outer air-porous surface (12) supported by an air-porous tubular supporting rod (24) with an internal feed of compressed air. Separation between the web and rod is maintained by an air cushion. The air pressure is maintained above 1 bar in the pressure chamber. The specific volume flow in the porous material is in the range 10 to 5000 Nm/h m. The intervals between adjacent pores is less than 1 mm. The average pore diameter is less than 0.1 mm. The drop in pressure between the pressure chamber and pore outer surface is greater than 0.8 bar. The air cushion between the pore outer surface and moving web is less than 3 mm. The rod rotates about its longitudinal axis. The rod diameter is 500 to 1500 mm.

Description

The invention relates to a web guiding and / or sealing device with at least one guide and / or sealing element for contactless Web guide or to the side or inlet and / or outlet side Sealing a humidification and / or application zone in one of the Production and / or treatment of a material web, in particular Paper or cardboard web, serving machine. It also affects one Application unit for the treatment of a material web, in particular paper or cardboard web, with at least one application device and at least one corresponding to them Web guiding and / or sealing device. Finally, the invention also relates a machine for producing and / or treating a material web, in particular paper or cardboard web, with at least one corresponding Web guiding and / or sealing device and / or at least a corresponding order unit.

So far, the material web has been guided by means of guide rollers, in which a Contact to the surface and a drive are absolutely necessary. A such web guidance is now relatively complex and expensive. The train must be peeled off the surface of such guide rollers, for what appropriate pulling forces are to be applied.

The invention has for its object an improved web guiding and / or sealing device, an improved application unit and to create an improved machine of the type mentioned at the outset, in which the aforementioned disadvantages are eliminated. In particular, it should stable wrinkle-free and reliable, non-contact web guidance can be achieved. In particular, the use of Web guiding and / or sealing device or the application unit in paper machines, Coating machines, calenders, slitting machines etc. to be possible. The number of drives should also be reduced in particular become.

With regard to the web guiding and / or sealing device, this is Problem solved according to the invention in that the web-side surface of the Guide or sealing element at least partially made of air-permeable porous Material exists, which can be acted upon with compressed air in order to air flowing through this porous material between the an air cushion to the web-side surface and the moving material web form.

The high pressure loss on the porous material creates a very uniform Air cushion, so the web of material in a relatively small Distance to the surface reliably guided or an optimal seal is achieved. The even air cushion brings in particular a wrinkle-free run with it. The relatively high internal pressure prevents any rail contact to the surface. In particular, there are fewer Drives required.

The web guiding and / or sealing device can therefore in particular comprise at least one guide and / or sealing element, which with Compressed air is supplied and has an open surface through which with high pressure loss, air is pushed through from the inside. So that will a stable, even air cushion both in terms of time and space generated that the web for example in a paper machine, one Coating machine, a calender, a slitter winder, etc. leads to the guide or sealing element without contact. The porous material does not pollute. The lifting device for the relevant order or Humidification device can be omitted. Resulting from the web tension stable web run over the spray nozzles.

In the humidification or application zone, e.g. Steam, Glue, coating colors or chemicals applied, especially sprayed on become.

The guide or sealing element preferably comprises at least one pressure chamber, via which the porous material can be pressurized with compressed air. The porous material can, for example, at least partially one containing the pressure chamber, at least one air passage opening provided carrier be applied. However, for example in particular also conceivable designs in which the porous material at least part of the pressure chamber wall forms.

The pressure in the pressure chamber can in particular be greater than 0.5 bar be, wherein it is preferably greater than 1 bar.

The specific volume flow in the porous material is expediently in a range from about 10 to about 5000 Nm ³ / h · m ² .

The hole or pore spacing or the distance between the outlet openings of the air-permeable porous material is preferably less than 1 mm.

The porous material is created in particular so that no single rays, but instead creates a very even air cushion is, which ensures a very good web guidance, in particular contact-free even in the case of holes, tears or strings remains. In a preferred practical embodiment of the invention The web guiding and / or sealing device is the average size of the outlet openings, pores and / or holes of the porous Material less than 0.2 mm and preferably less than 0.1 mm. The porous material is preferably created so that a high Pressure loss from the inside to the environment results in a very even Air cushion is ensured. With a practical practical Embodiment of the web guide and / or The sealing device is the pressure loss from the moving material web side facing away from the material web side of the porous Material greater than 0.2 bar and preferably greater than 0.8 bar.

The thickness of the surface between the web side and the moving material web Air cushion formed is advantageously less than 5 mm and preferably less than 3 mm.

The guide or sealing element can in particular be tubular or cylindrical be executed. The guide or sealing element can, for example as a standing or non-rotating roller or as a rotating, preferably be driven roller.

Especially in the case that the guide or sealing element as a standing or non-rotating roller, the air cushion is advantageously only produced on part of the circumference of the roller.

For example, the roller may have a diameter in a range of have about 50 mm to about 1500 mm.

In an expedient practical embodiment, the guide or Sealing element only wrapped around the material web. Are basically however, also conceivable designs in which the control or Sealing element in addition to the material web and at least one moving belt, in particular a mesh belt, is wrapped. in the the latter case, the moving belt, in particular screen belt, between the guide or sealing element and the material web or on the or sealing element facing away from the material web, i.e. outside.

The material web or the moving belt can be the guide or sealing element according to a wrap angle that is in is in a range from about 5 to about 260 °.

In certain cases it is also advantageous if the guide or sealing element is designed as an arc segment. It can be in the machine direction constant radius of curvature or in the machine direction have changing radius of curvature. In the latter In this case, the guide or sealing element can move in the machine direction continuously changing radius of curvature or a Machine radius of curvature changing in discrete steps have.

To create a spreading effect, the guide or sealing element or its surface on the web side in particular also in the transverse direction have a curved course. The radius of curvature of the Guide or sealing element or the surface on the web over which in Change width across width.

If the guide or sealing element is designed as an arc segment, it has it is expedient to have a segment height in a range of approximately 30 up to about 500 mm.

The radius of curvature of the surface on the web side is expediently in a range from about 5 to 3000 mm.

In a preferred practical embodiment of the invention The web guiding and / or sealing device is the guiding or Sealing element in the transverse direction and / or in the machine direction composed of several individual segments.

At least some of the segments can have a common compressed air supply be assigned. However, the segments can at least are partly supplied by separate compressed air supplies.

In a preferred practical embodiment of the invention Web guiding and / or sealing device is about individual separate segments and / or segment groups in the machine direction and / or in the transverse direction, a compressed air supply separated in zones intended. In the machine direction or cross direction So there is a special zone-wise pressure gradation.

In a further advantageous embodiment of the invention The web guiding and / or sealing device is the surface on the web side of the guide or sealing element by at least two each at least layers consisting partly of air-permeable porous material formed with preferably different properties.

For example, the pressure loss on the material web facing inner layer be smaller than on the outer layer. Alternatively or additionally, the porosity of the material web facing inner layer higher or their hole spacing larger than the outer layer. Alternatively or additionally, the hole diameter can on the inner layer facing away from the material web be larger than on the outer layer. It is also particularly advantageous if the layers are at least partially made of different materials consist.

Another preferred embodiment of the web guide according to the invention and / or sealing device is characterized by that the inner layer facing away from the material web only in a section consists of air-permeable porous material or is provided with air passage openings and is otherwise impermeable to air is, so that only in a partial area of the guide or sealing element an air cushion is created.

The inner layer facing away from the material web can at least partially made of metal, GRP and / or CFRP.

The inner layer facing away from the material web preferably provides the mechanical load-bearing capacity of the guide element or of the rail side Area.

The outermost surface of the guide or The sealing element advantageously consists of fine-porous material. she can therefore in particular have a finer degree of porosity than that inner layer.

It is particularly advantageous if the one facing the material web outermost surface of the guide or sealing element is sintered.

This outermost surface of the guide or However, the sealing element can also be made of ceramic material, for example consist.

It is particularly advantageous if the one facing the material web outermost surface of the guide or sealing element is easy to clean, for example, consists of an easy-to-clean material.

The surface of the guide or sealing element on the web side is advantageous with preferably generated directly when producing the outermost surface Provide air outlet openings. The relevant air outlet openings no longer have to go through a subsequent Machining can be introduced into the outermost surface.

According to a further aspect, the invention relates to an application unit for the treatment of a material web, in particular paper or cardboard web.

So far, application devices such as nozzle dampers or the like arranged between two guide rollers.

The application unit according to the invention is now characterized in that that there is at least one order facility and at least one of these assigned web guiding and / or sealing device according to the invention includes.

With such an application unit according to the invention prevents spray from the humidification or application zone emerges, and on the other hand at least one guide roller replaced. As a result of the synergy effect in view of a respective both the The guiding function and the element fulfilling the sealing function result a considerable cost reduction with regard to the web guiding device at the order facility. Firstly, it prevents spray mist exits while at the same time fulfilling a respective guiding function, whereby guide rollers are replaced.

Another advantage is that the porous material does not become dirty. In addition, the lifting device for the application device omitted. The web tension results in a stable web run over the spray nozzles.

The application device can, for example, at least one nozzle moistener, Steam box and / or the like include.

In a preferred practical embodiment, the application device assigned at least one guide and sealing element that both fulfills a guiding function as well as a sealing function. The air cushion created serves here among others as an air bearing.

For the lateral sealing of a moistening or application zone, in which the material web can be acted upon by the application device is, in the web running direction before and after the moistening or. Application zone each provided at least one guide or sealing element, that lies opposite the moving material web and is transverse to the web running direction extends.

It is particularly advantageous if at least one guide or sealing element is provided for deflecting the material web. It can for example, only one guide or sealing element for deflecting the material web be provided. In principle, however, such designs are also conceivable in which at least two guide or sealing elements for Deflection of the material web are provided.

In an expedient practical embodiment, the application device at least three consecutive guidance or sealing elements assigned, the material web, for example each of these guide or sealing elements can also be deflected. The guide or sealing elements can be on the same web side or be arranged on different web sides. In the latter case is particular such an embodiment is conceivable in the case of three successive ones Guiding or sealing elements the front and the rear guiding or Sealing element on one side of the web and the intermediate guide or Sealing element are arranged on the opposite side of the web.

In the case of a respective tubular or roller-like guide or sealing element this can in particular also be rotatably mounted, which is good Emergency running properties result after it also fails Pressure supply does not lead to friction between the material web or a moving belt, for example screen belt, and the rotating roller can come.

The web train is expediently dependent on the loop the order facility selected.

In a preferred practical embodiment of the invention Order aggregate is on the side facing away from the order facility At least one stabilizing element is provided on the side of the material web. This stabilizing element can at least essentially again be executed the same as a respective one according to the invention Guide or sealing element. The stabilizing element is expedient adjustable to the material web.

In a further expedient embodiment of the invention Order aggregate are the order facility at least three control or sealing elements, with at least one of them in one Distance from the humidification or application zone is arranged and practically fulfills only one guiding function.

In certain cases it can also be beneficial if on both Sides of the material web each have at least one application device is provided. In this case, the two order facilities in The web running direction may be offset, for example, from each other however, their humidification or order zones overlap. However, it is for example, such an embodiment is also conceivable in which the moistening or application zone of an application device in the direction of web travel considered within the humidification or application zone the other order facility.

In an expedient practical embodiment, the material web runs between the two application devices generally in the vertical direction. A corresponding web guide can also be in the area only one order facility would be advantageous.

As already mentioned, the web guiding or Sealing device and the application unit according to the invention in particular in a machine for producing and / or treating a Material web, in particular paper or cardboard web, are used. A corresponding machine according to the invention is thus characterized from that they have at least one invention Web guiding and / or sealing device and / or at least one according to the invention Order aggregate includes.

At least one corresponding, i.e. web guide according to the invention or sealing device and / or at least one corresponding, i.e. Application unit according to the invention in particular in one Machine section can be provided in which one is already largely dry material web is present. A web guide according to the invention or sealing device or an application unit according to the invention can be used as a replacement for a conventional paper guide roller a section of dry web may be provided. This also brings again the advantage that no drive is required, i.e. no more all guide rollers have to be driven, but only those which are essential for web tension.

Advantageously after, preferably immediately after the last Drying cylinder at least one corresponding web guiding or Sealing device and / or at least one corresponding application unit intended. Under an appropriate web guide or sealing device or a corresponding application unit is again a web guiding or sealing device according to the invention or to understand an application unit according to the invention.

In particular, it can in each case at least in front of and / or in a calender a corresponding web guiding or sealing device and / or at least one corresponding application unit is provided his. A respective web guiding or sealing device can be used or a respective order aggregate, in particular also directly be arranged before or immediately after the calender. As before mentioned, use of such devices or units is also within of the calender conceivable.

Basically, for example, in a coating machine and / or at least one corresponding one in a slitter Web guiding or sealing device and / or at least one corresponding application unit may be provided.

In an advantageous practical embodiment of the invention The machine is at least one corresponding web guiding device intended as a replacement for a respective spreader roller.

One of the advantages is also if directly before and / or after an air dryer at least one corresponding web guiding or sealing device and / or at least one corresponding application unit is provided. For example, directly before and / or after one Impingement dryer in a dryer section and / or in a coating machine or dryer section each have at least one corresponding one Web guiding or sealing device and / or at least one corresponding application unit may be provided.

In the case of a multi-layer construction of the surface on the web side, a the respective guide or sealing element, the pressure loss of the layers increase from the inside out. The porosity can change from the inside out remove outside. The hole spacing can also be from the inside, for example remove to the outside. The hole diameter can also be used, for example Remove from the inside out.

Figur 1

eine schematische Querschnittsdarstellung eines Leit-bzw. Dichtelements mit einer aus porösem Material bestehenden bahnseitigen Fläche,

Figur 2

eine schematische Querschnittsdarstellung einer weiteren Ausführungsform des Leit- bzw. Dichtelements, das hier beispielsweise in Form eines Bogen-Segments ausgeführt ist,

Figur 3

eine schematische Längsschnittdarstellung einer weiteren Ausführungsform des Leit- bzw. Dichtelements, das in Querrichtung in zumindest zwei Zonen oder Segmente unerteilt ist, wobei im vorliegenden Fall die verschiedenen Segmente mit gleichem Druck beaufschlagt sind,

Figur 4

eine mit der Ausführung gemäß Figur 3 vergleichbare Ausführungsform des Leit- bzw. Dichtelements, wobei im vorliegenden Fall die verschiedenen Segmente jedoch mit unterschiedlichem Druck beaufschlagt sind,

Figur 5

eine schematische Darstellung eines in Querrichtung durchgebogenen, beispielsweise zum Breitstrecken einsetzbaren Leitelements,

Figur 6

eine schematische Darstellung einer weiteren Ausführungsform, bei der ein Leitelement unmittelbar nach dem letzten Trockenzylinder einer einreihigen Trockengruppe einer Trockenpartie angeordnet ist,

Figur 7

eine schematische Darstellung einer weiteren Ausführungsform, bei der ein Leitelement unmittelbar nach dem letzten Trockenzylinder einer zweireihigen Trockengruppe einer Trockenpartie angeordnet ist,

Figur 8

eine schematische Darstellung einer weiteren Ausführungsform, bei der ein Leitelement nach der Trockenpartie und vor einer Auftragseinrichtung, ein Leitelement zwischen der Auftragseinrichtung und einem Impingement-Trockner und ein Leitelement nach dem Impingement-Trockner angeordnet ist,

Figur 9

eine schematische Darstellung einer weiteren Ausführungsform mit vor, im und nach einem Kalander vorgesehenen Leitelementen,

Figur 10

eine schematische Darstellung eines Auftragsaggregats mit einer Auftragseinrichtung und zwei dieser zugeordneten Leit- und Dichtelementen,

Figur 11

eine schematische Darstellung einer weiteren Ausgestaltung eines Bahnführungsabschnitts mit einem eine Auftragseinrichtung und zwei zugeordnete Leit- und Dichtelemente umfassenden Auftragsaggregats,

Figur 12

eine schematische Darstellung einer weiteren Ausgestaltung eines Bahnführungsabschnitts mit zwei jeweils eine Auftragseinrichtung und zwei zugeordnete Leit- und Dichtelemente umfassenden Auftragsaggregaten, die hier beispielsweise auf verschiedenen Bahnseiten angeordnet sind,

Figur 13

eine schematische Darstellung einer weiteren Ausgestaltung eines Bahnführungsabschnitts mit einem eine Auftragseinrichtung und zwei zugeordnete Leit- und Dichtelemente umfassenden Auftragsaggregats,

Figur 14

eine schematische perspektivische Darstellung eines Leit- bzw. Dichtelements, das in Form eines Rohres vorgesehen ist, das auf seiner der bewegten Bahn zugewandten Seite mit Luftdurchtrittslöchern versehen und mit porösem Material beschichtet ist,

Figur 15

eine schematische perspektivische Darstellung eines Dichtelements, das in Form eine Kanals mit einer ebenen Bodenwand, zwei ebenen Seitenwänden und einer gewölbten oberen Wand vorgesehen ist, dessen der bewegten Bahn zugewandte gewölbte obere Wand mit Luftdurchtrittslöchern versehen und mit porösem Material beschichtet ist,

Figur 16

eine schematische perspektivische Darstellung einer weiteren Ausführungsform eines kanalartigen Dichtelements, dessen der bewegten Bahn zugewandter gewölbte obere Wandungsteil durch poröses Material gebildet ist, das in die restliche Kanalwandung eingesetzt ist,

Figur 17

eine schematische Schnittdarstellung eines rohrartigen Leit- bzw. Dichtelements, das vollständig aus porösem Material besteht,

Figur 18

eine schematische perspektivische Teildarstellung einer weiteren Ausführungsform eines vollständig aus porösem Material bestehenden Leit- bzw. Dichtelements, das auf seiner von der bewegten Bahn abgewandten Seite jedoch mit einer Abdichtung versehen ist, die auf dieser Seite einen Luftdurchtritt verhindert,

Figur 19

eine schematische Darstellung einer weiteren Ausführungsform der Bahnführungs- bzw. Dichtungseinrichtung, bei der sowohl das vordere als auch das hintere Leit- bzw. Dichtelement jeweils rohr- oder walzenartig ausgeführt ist und jeweils wenigstens einen luftführenden Kanal umfasst, dessen Wandung aus porösem Material besteht, durch das Luft hindurchströmt,

Figur 20

eine schematische Darstellung eines aus porösem Material bestehenden gekrümmten Abschnitts eines Leit- bzw. Dichtelements, in dessen Bereich die Bahn entsprechend einem bestimmten Winkel umgelenkt wird,

Figur 21

eine schematische Darstellung eines Auftragsaggregats mit einer Auftragseinrichtung, der drei in Bahnlaufrichtung aufeinanderfolgende Leit- bzw. Dichtelemente zugeordnet sind, wobei im vorliegenden Fall alle drei Leit- bzw. Dichtelemente auf derselben Bahnseite angeordnet sind,

Figur 22

eine schematische Darstellung einer weiteren Ausführungsform eines Auftragsaggregats mit einer Auftragseinrichtung, der drei in Bahnlaufrichtung aufeinanderfolgende Lauf- bzw. Dichtelemente zugeordnet sind, wobei im vorliegenden Fall jedoch zwei Leit- bzw. Dichtelemente auf der Seite der Auftragseinrichtung und ein dazwischen liegendes Leitelement auf der gegenüberliegenden Bahnseite angeordnet sind,

Figur 23

eine schematische Darstellung einer weiteren Ausführungsform, bei der auf der von der Auftragseinrichtung abgewandten Seite der Materialbahn zwei Stabilisierungselemente vorgesehen sind,

Figur 24

eine schematische Darstellung einer Ausführungsform mit zwei Auftragsaggregaten, deren Auftragseinrichtungen jeweils zwei Leit- und Dichtelemente und ein Leitelement zugeordnet sind,

Figur 25

eine schematische Darstellung einer Ausführungsform bei der auf beiden Seiten der Materialbahn jeweils eine Auftragseinrichtung mit zwei zugeordneten Leit- bzw. Dichtelementen angeordnet sind, wobei die beiden Auftragseinrichtungen in Bahnlaufrichtung versetzt sind und sich deren Befeuchtungs- bzw. Auftragszonen überlappen,

Figur 26

eine schematische Darstellung einer weiteren Ausführungsform, bei der auf beiden Seiten der Materialbahn jeweils eine Auftragseinrichtung mit zwei zugeordneten Leit- bzw. Dichtelementen angeordnet sind, wobei im vorliegenden Fall jedoch die Befeuchtungs- bzw. Auftragszone der einen Auftragseinrichtung in Bahnlaufrichtung betrachtet innerhalb der Befeuchtungs- bzw. Auftragszone der anderen Auftragseinrichtung liegt, und

Figur 27

eine schematische Darstellung einer insbesondere für einen Kalander geeigneten Konfiguration mit mehreren jeweils eine Auftragseinrichtung mit zwei zugeordneten Leit- und Dichtelementen umfassenden Auftragsaggregaten.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawing; in this show:

Figure 1

a schematic cross-sectional view of a guidance or. Sealing element with a surface made of porous material on the web side,

Figure 2

2 shows a schematic cross-sectional representation of a further embodiment of the guide or sealing element, which is designed here, for example, in the form of an arc segment

Figure 3

2 shows a schematic longitudinal sectional illustration of a further embodiment of the guide or sealing element, which is undivided in the transverse direction in at least two zones or segments, the different segments being acted upon with the same pressure in the present case,

Figure 4

3 shows an embodiment of the guide or sealing element which is comparable to the embodiment according to FIG. 3, but in the present case the different segments are subjected to different pressures,

Figure 5

1 shows a schematic illustration of a guide element which is bent in the transverse direction and can be used, for example, for wide stretching,

Figure 6

1 shows a schematic representation of a further embodiment, in which a guide element is arranged immediately after the last drying cylinder of a single-row dryer group of a dryer section,

Figure 7

1 shows a schematic representation of a further embodiment, in which a guide element is arranged immediately after the last drying cylinder of a two-row dryer group of a dryer section,

Figure 8

1 shows a schematic representation of a further embodiment, in which a guide element is arranged after the dryer section and in front of an application device, a guide element between the application device and an impingement dryer and a guide element after the impingement dryer,

Figure 9

1 shows a schematic representation of a further embodiment with guide elements provided before, in and after a calender,

Figure 10

1 shows a schematic representation of an application unit with an application device and two guide and sealing elements assigned to it,

Figure 11

1 shows a schematic illustration of a further embodiment of a web guide section with an application unit comprising an application device and two associated guide and sealing elements,

Figure 12

1 shows a schematic representation of a further embodiment of a web guide section with two application units each comprising an application device and two assigned guide and sealing elements, which are arranged here, for example, on different web sides,

Figure 13

1 shows a schematic illustration of a further embodiment of a web guide section with an application unit comprising an application device and two associated guide and sealing elements,

Figure 14

2 shows a schematic perspective illustration of a guide or sealing element which is provided in the form of a tube which is provided with air passage holes on its side facing the moving web and is coated with porous material,

Figure 15

1 shows a schematic perspective illustration of a sealing element which is provided in the form of a channel with a flat bottom wall, two flat side walls and a curved upper wall, the curved upper wall facing the moving web being provided with air passage holes and coated with porous material,

Figure 16

1 shows a schematic perspective illustration of a further embodiment of a channel-like sealing element, the curved upper wall part of which, facing the moving web, is formed by porous material which is inserted into the remaining channel wall,

Figure 17

2 shows a schematic sectional illustration of a tubular guide or sealing element which consists entirely of porous material,

Figure 18

2 shows a schematic perspective partial representation of a further embodiment of a guide or sealing element consisting entirely of porous material, but which is provided on its side facing away from the moving web with a seal which prevents air passage on this side,

Figure 19

is a schematic representation of a further embodiment of the web guiding or sealing device, in which both the front and the rear guiding or sealing element are each tubular or cylindrical and each comprise at least one air-guiding channel, the wall of which is made of porous material the air flows through

Figure 20

1 shows a schematic illustration of a curved section of a guide or sealing element made of porous material, in the area of which the web is deflected according to a certain angle,

Figure 21

2 shows a schematic representation of an application unit with an application device, to which three guide or sealing elements which are consecutive in the web running direction are assigned, all three guide or sealing elements being arranged on the same web side in the present case,

Figure 22

is a schematic representation of a further embodiment of an application unit with an application device, the three successive running or sealing elements are assigned in the web running direction, but in the present case, two guide or sealing elements on the side of the application device and an intermediate guide element on the opposite side of the web are arranged

Figure 23

1 shows a schematic representation of a further embodiment, in which two stabilizing elements are provided on the side of the material web facing away from the application device,

Figure 24

1 shows a schematic representation of an embodiment with two application units, the application devices of which are each assigned two guide and sealing elements and one guide element,

Figure 25

1 shows a schematic representation of an embodiment in which an application device with two associated guide or sealing elements is arranged on each side of the material web, the two application devices being offset in the direction of web travel and their moistening or application zones overlapping,

Figure 26

is a schematic representation of a further embodiment, in each of which an application device with two associated guide or sealing elements are arranged on both sides of the material web, but in the present case, however, the moistening or application zone of the one application device viewed in the direction of web travel within the moistening or Order zone of the other order facility lies, and

Figure 27

a schematic representation of a configuration suitable in particular for a calender with a plurality of application units each comprising an application device with two assigned guide and sealing elements.

Figure 1 shows a schematic representation of a first embodiment a guiding and / or sealing element 10 of a web guiding and / or Sealing device, in particular in one of the manufacture and / or Treatment of a material web, in particular paper or cardboard web, serving machine can be used.

In the present case, for example, in the form of a tube or a The roller or guide element 10 has a web side Surface 12, which consists of air-permeable porous material 14, the from Compressed air can be applied to the inside through the porous Air 14 flowing through air 16 between the porous material 14 and the moving material web to form an air cushion 18.

The guide or sealing element 10 comprises at least one pressure chamber 20, via which the porous material 14 can be acted upon by compressed air.

The guide or sealing element 10 can, as shown, for example one containing the pressure chamber 20, with at least one and preferably comprise a plurality of air passage openings 22 provided carrier 24, on which the porous material 14 is applied. In the present case this, for example, roller-shaped carrier 24 in the circumferential direction completely surrounded by porous material 14. The wall of the pressure chamber 20, however, is only over part of its circumference with air passage openings 22 provided so that the air cushion 18 only over a part of the circumference of the guide or sealing element 10 is generated. The air cushion 18 is expediently at least in the region generated in which the material web wraps around the guide or sealing element 10.

Due to the roller-shaped design, the guide or sealing element has 10 in particular also in the wrapping area in the machine running direction L a radius of curvature.

FIG. 2 shows a further embodiment in a schematic cross-sectional illustration of the guide or sealing element 10, which here, for example, in Form of an arc segment is executed. Via a pressure chamber 20 the segment in question is pressurized again so that Air 16 flows through the porous material 14 from the inside out. Also in the present case, the porous material 14 is again on the outside the carrier 24 containing the pressure chamber 20 is applied. The wall of the carrier 24 or the pressure chamber 20 is again with air passage openings 22 provided, through which the porous material 14 from the inside Comes with compressed air.

As can be seen from FIG. 2, the guide or sealing element 10 or its surface 12 on the web side is also curved again in the machine running direction L in the present case. As in the embodiment according to FIG. 1, the radius of curvature is constant, for example, over the wrapping area.
Figure 3 shows a schematic longitudinal sectional view of a further embodiment of the guide or sealing element 10. In this case, the guide or sealing element 10 or its pressure chamber is divided in the transverse direction into at least two zones or segments 20 ', 20 ", via which the Compressed air can optionally be applied separately to porous material 14 in the transverse direction. In the phase shown in FIG. 3, zones 20 ', 20 "are at least temporarily subjected to the same pressure. In contrast, FIG. 4 shows a corresponding guide or sealing element 10 in a phase in which the zones or segments 20 ', 20 "are acted upon with different pressures.

Depending on the respective requirements, the pressure can therefore vary across the width, i.e. can be varied in the transverse direction in the desired manner.

Otherwise, the guide or sealing element 10 can at least essentially in particular have such a structure again, as e.g. in the Context has been described with the other versions. Corresponding parts are assigned the same reference numerals.

FIG. 5 shows a schematic illustration of a cross-bent, for example, guide element 10 that can be used for wide-area stretching. The guide element 10 again has at least one pressure chamber 20 having carrier 24 on which the porous material 14 is attached and via the pressure chamber 20 of the porous material 14 from the inside is pressurized with compressed air.

With a corresponding rotation of the guide element 10 can, for example the effective deflection radius can be changed.

Otherwise, this embodiment can, for example, at least in Essentially the same structure as that previously described Own designs. Corresponding parts are the same Assigned reference numerals.

While in the previously described embodiments, the porous Material 14 each on one provided with air passage openings 22 Carrier 24 is attached, in principle, at least a part a support wall or at least part of the wall of the pressure chamber 20 be formed by the porous material 14.

Figure 6 shows a schematic representation of a guide element 10 that immediately behind the last drying cylinder 30 of a single-row dryer group a drying section 32 is arranged. The dry group shown can be provided in particular at the end of the dryer section 32 so that the guide element 10 here e.g. immediately after the dryer section 30 can be provided.

The guide element 10 is only of the material web in the present case 28 entwined.

The guide element 10 can again have such a structure, for example, like this before described in connection with Figures 1 to 5 has been. Basically, however, here are any Embodiments of the invention, provided with porous material Guide element 10 conceivable.

FIG. 7 shows a schematic representation of one provided with porous material Guide element 10, which is immediately after the last drying cylinder 30 arranged a two-tier dryer group of a dryer section 32 is. In the present case it can also be the case of the dry group shown especially around the last dryer section of the dryer section 32 act, so that the guide element 10 again directly here is arranged after the dryer section 32.

In the present case too, the guide element 10 is only from the material web 28 entwined.

The guiding element 10 can in particular be designed again as this was previously described, for example, with reference to FIGS. 1 to 5, however, here again, basically any embodiments of the guide element according to the invention, provided with porous material 10 are conceivable.

In the illustration according to FIG. 8, a guide element 10 _{1 is arranged} after the drying section 32 and in front of an application device 34, a guide element 10 ₂ between the application device 34 and, for example, an impingement dryer 36 and a guide element 10 ₃ after the impingement dryer 36. The guide elements 10 can, in particular, be designed again as described above, for example, with reference to FIGS. 1 to 5. They are also each provided with porous material.

FIG. 9 shows a further embodiment in a schematic representation with guide elements 10 provided before, in and after a calender 44, which, for example, again have a cylindrical structure. These guide elements 10 are each again made of porous material provided or made of such.

Figure 10 shows a schematic representation of an application unit with a Application device 44, here for example a nozzle moistener, and two associated guide and sealing elements 10, via which the material web 28, i.e. especially paper or cardboard web, contactless is led. The guide and sealing elements 10 therefore both meet here a leading function as well as a sealing function.

In the present case, one is for lateral sealing Moistening or application zone 46, in which the material web 28 through the application device 44 can be acted upon in the web running direction L before and after the Humidification or application zone 46 each have at least one guide and Sealing element 10 is provided, which lies opposite the moving material web 28 and extends across the web direction. It is in In the present case, at least the front guide and sealing element 10 also provided for deflecting the material web 28.

The one forming an edge seal, here e.g. tubular or cylindrical Guide and sealing elements 10 can also be rotatable.

The air cushion in question results in two air bearings.

FIG. 11 shows a further embodiment in a schematic representation a web guide section with an application device 44, here e.g. a nozzle moistener, and two associated guide and sealing elements 10 comprehensive order aggregate.

Through the two guiding and sealing elements, each serving as an edge seal 10 ensures that the material web 28 the seals not touched.

For example, in the web running direction L in front of the application unit 10, 44 a guide roller 48 and an spreader roller 50 are provided. Behind the Application unit 10, 44, the material web 28 via a further guide roller 52 led. Just as the guide and sealing elements 10 can for example, the elements 48 to 52 each with porous material be provided, which is pressurized accordingly to a To generate air cushions. These elements 48 to 52 can however, they are also conventional elements.

FIG. 12 shows a further embodiment in a schematic representation a web guide section with two application devices each 44, here for example nozzle humidifier, and two assigned guide and Sealing elements 10 comprehensive application unit. As with everyone other exemplary embodiments are also the guiding principles in the present case. or sealing elements 10 each again provided with porous material.

A guide roller 54 is located between the two application units 10, 44 intended. This guide roller 54 can, for example, again be used accordingly be provided with porous material. Basically, however a conventional guide roller 54 may also be provided.

The train is from the wrapping of the respective order aggregates 10, 44 dependent.

FIG. 13 shows a further embodiment in a schematic representation a web guide section with an application device 44, here, for example, nozzle humidifier, and two assigned guide and Sealing elements 10 comprehensive application unit.

Just as for example in the embodiments according to the figures 11 and 12 causes the application unit 10, 44 also here again Deflection of the material web 28, so that ultimately the application unit as a whole also serves as a replacement for a guide roller.

In the web running direction L in front of the application unit 10, 44 are a guide roller 48 and an spreader roller 50 are provided. After the order aggregate 10, 44, the material web 28 is guided over a further guide roller 48.

FIG. 14 shows a guide or Sealing element 10, which is provided in the form of a tube 10 'on its side facing the moving web with air passage openings 22 is provided and coated with porous material 14.

FIG. 15 shows a guide or Sealing element 10, which in the form of an air supply channel 20 'with a flat bottom wall 56, two flat side walls 58 and an arched Upper wall 60 is provided, the one facing the moving path curved upper wall 60 provided with air passage openings 22 and is coated with porous material 14. The air duct 20 ' here again serves as a carrier for the porous material 14, via which the Web is guided.

A further embodiment of a channel-like guide or sealing element 10 is shown in FIG. 16 in a schematic perspective illustration. In this case, the curved upper wall part of the guiding or sealing element 10 facing the moving web is formed by porous material 14 which is inserted into the remaining wall of the channel 20 '.
FIG. 17 shows a schematic sectional illustration of a tubular sealing element 10 which consists entirely of porous material 14.

There is no pressure zone, especially with small and medium air flows or sealing of a sector is required because the porous material 14 has a sufficiently high pressure drop and the air flow reduced a measure that is sufficient to form the air cushion.

Figure 18 shows a schematic perspective partial representation of a Another embodiment of a completely made of porous material 14 tubular guide or sealing element 10, which on its from the However, moving side facing away from the web is provided with a seal 62 which prevents air from passing through on this side. Such Seal 62 is particularly useful for larger air flows, to keep the leakage small.

FIG. 19 shows a further embodiment in a schematic representation an application device 44, e.g. Nozzle dampener, with two assigned Guide and sealing elements 10 comprehensive application unit, wherein the two guide and sealing elements 10, made of porous material as a cylinder or rollers are formed. The rollers can be rotated on the box of the Application device 44 may be arranged or stored, which among other things. also brings good emergency running properties again.

In the present case, too, the two are before or after the moistening or order zone 46 arranged, each transverse to the web running direction L extending guide and sealing elements 10 back to the side Sealing of the moistening or application zone 46 is provided.

Figure 20 shows a schematic representation of a porous material 14 existing curved section of a guide or sealing element 10, in the area of which the material web 28 corresponds to an angle α is deflected, for example greater than 0 ° and less than 180 °, in particular greater than 0 ° and less than 100 °, in particular greater than 2 ° and less than 90 °, in particular greater than 0 ° and less than 40 ° and can preferably be greater than 2 ° and less than 20 °. With one Execution will include a more stable web run is achieved.

The moving material web 28 is under a tensile stress Z. Here can that between a respective guide or sealing element 10 and the moving material web 28 adjusting air cushion and accordingly also the barrier effect against the escape of spray mist over the Tension Z can be set, especially at higher speeds is appropriate.

The web tension P _z results from the relationship P _z = Z / R, with P _z = web tension, Z = tension and R = outer radius of the sealing element area opposite the material web. During operation, an equilibrium state P _z = P (P = pressure in the pressure zone) is established, which results in a kind of self-regulating effect.

Furthermore, the extent of the sealing effect can be determined by the extent of the wrap of the respective guide or sealing element 10 or the relevant one porous material 14 through the moving material web 28 and / or the tensile stress Z of the moving web 28 is influenced or set in a targeted manner become. The larger the wrap is chosen, the better the blocking effect with constant web tension. Or the train Z can be reduced without impairing the blocking effect.

The moving path 28 can in particular be along a curved path Web are guided over the porous material 14 (cf. in particular FIG 15).

The following are some variants of the web guide on the box of the Order facility shown itself. Such a special path the box is based on the considerations that the expansion the application device, for example nozzle dampers or the like in Machine direction due to large quantities of water being applied can be very large, e.g. larger than 900 mm. Especially in such Cases, for example, the following variants can be one enable stable web running over the application device.

Figure 21 shows a schematic representation of an application unit with a Application device 44, here e.g. a nozzle humidifier that has three in Web running direction L successive guide or sealing elements 10 assigned. In the present case, all three guide and sealing elements are located 10 on the same side of the track. As can be seen from FIG. 21 in the present case, the material web 28 is thus deflected outwards.

FIG. 22 shows a further embodiment in a schematic representation an application unit with an application device 44, here for example a nozzle moistener, the three successive in the web running direction L. Guide or sealing elements 10 are assigned. In the present The only cases, however, are the two at the inlet and the outlet of the Application device 44 provided guide and sealing elements 10 on the same web side provided, while the middle guide element 10 on the opposite side of the web is arranged. As with the figure 22 can be seen, the material web 28 is in the present case by the middle guide element 10 is thus deflected inwards.

FIG. 23 shows a further embodiment in a schematic representation, in which on the by the application device 44, e.g. Nozzle unit, opposite side of the material web 28 two stabilizing elements 64 are provided. The application device arranged on the other side of the belt 44 are again the humidification or application zone 46 laterally sealing and the material web 28 leading or deflecting Guide and sealing elements 10 are provided.

The stabilizing elements 64 can at least essentially as the guide and sealing elements 10 executed and made of porous material exist or be provided with such a porous material.

As can be seen from FIG. 23, the material web 28 becomes the Application unit 10, 44 from a drying cylinder 30 via a guide roller 48 fed. In the area of the drying cylinder 30 there is also a dryer fabric 66 to recognize that in the region of a deflecting roller 68 from the drying cylinder and the material web 28 is removed.

Figure 24 shows a schematic representation of an embodiment with two application units 10, 44, the application device 44 each two Guide and sealing elements 10 and a guide element 10 'are assigned to the continuously provided with porous material or made of porous Material can exist. While the two guide and sealing elements 10 of a respective application device again the edge seal serve, the guiding element 10 'fulfills only one guiding function.

In the present case, the order devices 44 are therefore three each Associated guide or sealing elements 10, 10 ', one of which in one Distance from the humidification or application zone 46 is arranged and practically fulfills only one guiding function.

The material web follows the two application devices 44 in the present case via a guide roller 48 and an spreader roller 50 fed to a calender 70.

FIG. 25 shows an embodiment in a schematic representation an application device on each side of the material web 28 44, e.g. Nozzle dampener, with two assigned, the edge seal serving guide and sealing elements 10 is arranged. Here are the two application devices 44 offset in the web running direction L, wherein their humidification or application zones 46 overlap.

The material web follows the two application devices 44 28 again fed to a calender 70 via guide rollers 48.

As can be seen from FIG. 25, the material web 28 is in the present case, for example, generally vertically by the between led to the two application facilities 44 area.

FIG. 26 shows a further embodiment in a schematic representation, with one application device on each side of the material web 28 44, e.g. Nozzle humidifier, with two assigned guide and Sealing elements 10 are arranged. In the present case, however, Moistening or application zone of the one application device 44 in Direction of web travel L considered within the moistening or application zone 46 of the other application device 44. Here, too Material web 28 again generally vertically through the between the two Order facilities 44 lying area led. Following the In both application devices 44, the material web 28 is guided over guide rollers 48 fed back to a calender 70.

FIG. 27 shows a schematic illustration of one in particular for one Calender suitable configuration with several one application device each 44 comprising two associated guide and sealing elements 10 Applicators.

For example, in the present configuration, the upper roller 72 be plastic-related. The second roller 74 viewed from above can for example, a heated steel roller. The second last roller 76 can especially be heated again.

At least in the case of the application devices 44 partially in each case in particular a steam blower box. As can be seen from FIG. 27, these are each from the Web 28 wrapped. For example, the one shown at the top right Steam box 44 replaces a conventional baffle. Also the Steam blower box 44 shown at the bottom right is of the material web 28 still entwined. Also with the order facility shown below left 44 a guide element is ultimately replaced.

LIST OF REFERENCE NUMBERS

10

Guide and / or sealing element

10 '

vane

12

web side surface

14

porous material

16

air flowing through

18

bubble

20

pressure chamber

20 '

channel

22

Air passage opening

24

carrier

26

Press, press section

28

web

30

drying cylinders

32

drying section

34

applicator

36

Impingement dryer

38

Impingement dryer

42

double-tier dryer group

44

Application device, nozzle moistener, steam blower box

46

Humidification or application zone

48

guide roll

50

Spreader roll

52

guide roll

54

guide roll

56

bottom wall

58

Side wall

60

top wall

62

seal

64

stabilizing element

66

dryer

68

deflecting

70

calender

72

roller

74

roller

76

roller

Claims (79)

Web guiding and / or sealing device with at least one guiding and / or sealing element (10) for contactless web guiding or for lateral or inlet and / or outlet-side sealing of a moistening and / or application zone (46) in one of the manufacturing and / or Treatment of a material web (28), in particular a machine serving paper or cardboard,
characterized in that the web-side surface (12) of the guide or sealing element (10) consists at least partially of air-permeable porous material (14) which can be pressurized with compressed air to pass through the air (16) flowing through this porous material (14) ) to form an air cushion (18) between the web-side surface (12) and the moving material web (28). Web guiding and / or sealing device according to claim 1,
characterized in that water, steam, glue, coating color and / or chemicals can be applied, in particular sprayed, in the moistening or application zone (46). Web guiding and / or sealing device according to claim 1 or 2,
characterized in that the guide or sealing element (10) comprises at least one pressure chamber (20) via which the porous material (14) can be acted upon by compressed air. Web guiding and / or sealing device according to claim 3,
characterized in that the porous material (14) is at least partially applied to a support (24) containing the pressure chamber (20) and provided with at least one air passage opening (22). Web guiding and / or sealing device according to claim 3 or 4,
characterized in that the porous material (14) forms at least part of the pressure chamber wall. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the pressure in the pressure chamber (20) is greater than 0.5 bar and preferably greater than 1 bar. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the specific volume flow in the porous material is in a range from about 10 to about 5000 N · m ³ / hm ² . Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the hole or pore spacing or the spacing of the outlet openings of the air-permeable porous material (14) is less than 1 mm. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the average size of the outlet openings, pores and / or holes of the porous material (14) is less than 0.2 mm and preferably less than 0.1 mm. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the pressure loss from the side facing away from the moving material web (28) to the side of the porous material (14) facing the material web (28) is greater than 0.2 bar and preferably greater than 0.8 bar. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the thickness of the air cushion (18) formed between the web-side surface (12) and the moving material web (28) is less than 5 mm and preferably less than 3 mm. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the guide or sealing element (10) is designed as a roller. Web guiding and / or sealing device according to claim 12,
characterized in that the guide or sealing element (10) is designed as a standing or non-rotating roller. Web guiding and / or sealing device according to claim 13,
characterized in that the air cushion (18) is produced only on part of the circumference of the roller. Web guiding and / or sealing device according to claim 12,
characterized in that the guide or sealing element (10) is designed as a rotating, preferably driven roller. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the roller has a diameter in a range from about 50 mm to about 1500 mm. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the guide or sealing element (10) is wrapped only by the material web (28). Web guiding and / or sealing device according to one of claims 1 to 16,
characterized in that the guide or sealing element (10) is wrapped not only by the material web (28) but also by at least one moving belt (33, 40), in particular a wire belt. Web guiding and / or sealing device according to claim 18,
characterized in that the moving belt, in particular screen belt, is guided between the guide or sealing element (10) and the material web (28). Web guiding and / or sealing device according to claim 18,
characterized in that the moving belt, in particular screen belt, is guided on the side of the material web (28) facing away from the guide or sealing element (10). Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the material web (28) or the moving belt wraps around the guide or sealing element (10) in accordance with a wrap angle which is in the range from approximately 5 to approximately 260 °. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the guide or sealing element (10) is designed as an arc segment. Web guiding and / or sealing device according to claim 22,
characterized in that the guide or sealing element (10) has a constant radius of curvature in the machine direction (L). Web guiding and / or sealing device according to claim 22,
characterized in that the guide or sealing element (10) has a radius of curvature which changes in the machine direction (L). Web guiding and / or sealing device according to claim 23,
characterized in that the guide or sealing element (10) has a radius of curvature which changes continuously in the machine direction (L). Web guiding and / or sealing device according to claim 23,
characterized in that the guide or sealing element (10) has a radius of curvature which changes in discrete steps in the machine direction (L). Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the guide or sealing element (10) or its web-side surface (12) has a curvature in the transverse direction. Web guiding and / or sealing device according to claim 27,
characterized in that the radius of curvature of the guide or sealing element (10) or the web-side surface (12) changes over the width extending in the transverse direction. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the guiding or sealing element (10) designed as a curved segment has a segment height in a range from approximately 30 to approximately 500 mm. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the radius of curvature of the surface (12) on the web side is in a range from approximately 5 to approximately 3000 mm. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the guide or sealing element (10) in the transverse direction and / or in the machine direction (L) is composed of several individual segments (20 ', 20 "). Web guiding and / or sealing device according to claim 31,
characterized in that at least some of the segments (20 ', 20 ") are assigned a common compressed air supply. Web guiding and / or sealing device according to claim 31 or 32,
characterized in that at least partially separate compressed air supplies are assigned to the segments (20 ', 20 "). Web guiding and / or sealing device according to one of the preceding claims,
characterized in that compressed zones of compressed air are provided zone by zone by means of individual separate segments (20 ', 20 ") and / or segment groups in the machine direction (L) and / or in the transverse direction. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the web-side surface (12) of the guide or sealing element (10) is formed by at least two layers, each consisting at least partially of air-permeable porous material (14) with preferably different properties. Web guiding and / or sealing device according to claim 35,
characterized in that the pressure loss on the inner layer facing away from the material web (28) is smaller than on the outer layer. Web guiding and / or sealing device according to claim 35 or 36,
characterized in that the porosity of the inner layer facing away from the material web (28) is higher or its hole spacing is greater than in the outer layer. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the hole diameter on the inner layer facing away from the material web (28) is larger than on the outer layer. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the layers consist at least partially of different material. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the inner layer facing away from the material web (28) consists only in a partial area of air-permeable porous material (14) or is provided with air passage openings (22) and is otherwise air-impermeable, so that only in a partial area of the guide or sealing element (10) an air cushion (18) is formed. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the inner layer facing away from the material web (28) consists at least partially of metal, GRP and / or CFRP. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the inner layer facing away from the material web (28) provides the mechanical load-bearing capacity of the guide or sealing element (10) or the surface (12) on the web side. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the outermost surface of the guide or sealing element (10) facing the material web (28) consists of fine-porous material. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the outermost surface of the guide or sealing element (10) facing the material web (28) is sintered. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the outermost surface of the guide or sealing element (10) facing the material web (28) consists of ceramic material. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the outermost surface of the guide or sealing element (10) facing the material web (28) consists of an easy-to-clean material. Web guiding and / or sealing device according to one of the preceding claims,
characterized in that the surface (12) of the guide or sealing element (10) on the web side is provided with air outlet openings (22) which are preferably produced directly when the outermost surface is produced. Application unit for the treatment of a material web, in particular Paper or cardboard web, with at least one application device (44) and at least one of them Web guiding and / or sealing device according to one of the preceding Expectations. Application unit according to claim 48,
characterized in that the application device (44) comprises at least one nozzle humidifier, steam blower box and / or the like. Applicator unit according to one of the preceding claims,
characterized in that the application device (44) is assigned at least one guiding and sealing element (10) which fulfills both a guiding function and a sealing function. Applicator unit according to one of the preceding claims,
characterized in that for lateral sealing of a moistening or application zone (46), in which the material web (28) can be acted upon by the application device (44), in the web running direction (L) before and after the moistening or application zone (46) In each case at least one guide or sealing element (10) is provided, which is opposite the moving material web (28) and extends transversely to the web running direction (L). Applicator unit according to one of the preceding claims,
characterized in that at least one guide or sealing element (10) is provided for deflecting the material web (28). Application unit according to claim 52,
characterized in that only one guide or sealing element (10) is provided for deflecting the material web (28). Application unit according to claim 52,
characterized in that at least two guide or sealing elements (10) are provided for deflecting the material web (28). Application unit according to claim 54,
characterized in that the application device (44) is assigned at least three guide or sealing elements (10) which follow one another in the web running direction and the material web (28) is preferably also deflected on each of these guide or sealing elements (10). Application unit according to claim 55,
characterized in that the guide or sealing elements (10) are arranged on the same web side. Application unit according to claim 55,
characterized in that of three successive guide or sealing elements (10) the front and the rear guide or sealing element (10) are arranged on one side of the web and the intermediate guide or sealing element (10) is arranged on the opposite side of the web are. Applicator unit according to one of the preceding claims,
characterized in that at least one tubular or roller-like, preferably rotatably mounted guide or sealing element (10) is provided. Applicator unit according to one of the preceding claims,
characterized in that the web train is selected as a function of the wrapping of the application device (44). Applicator unit according to one of the preceding claims,
characterized in that at least one stabilizing element (64) is provided on the side of the material web (28) facing away from the application device (44). Application unit according to claim 60,
characterized in that the stabilizing element (64) is at least substantially the same as a respective guide or sealing element (10). Application unit according to claim 60 or 61,
characterized in that the stabilizing element (64) can be adjusted to the material web (28). Applicator unit according to one of the preceding claims,
characterized in that the application device (44) is assigned at least three guide or sealing elements (10, 10 '), at least one (10') of which is arranged at a distance from the moistening or application zone (46) and thus practically fulfills only one guiding function. Applicator unit according to one of the preceding claims,
characterized in that at least one application device (44) is provided on each side of the material web (28). Application unit according to claim 64,
characterized in that the two application devices (44) are offset from one another in the direction of web travel (L), but their moistening or application zones (46) overlap. Application unit according to claim 64,
characterized in that the moistening or application zone (46) of the one application device (44), viewed in the web running direction (L), lies within the moistening or application zone (46) of the other application device (44). Applicator unit according to one of claims 64 to 66,
characterized in that the material web (28) between the two application devices (44) runs generally in the vertical direction. Machine for the production and / or treatment of a material web (28), in particular paper or cardboard web, with at least one Web guiding and / or sealing device and / or at least an application unit according to one of the preceding claims. Machine according to claim 68,
characterized in that the guide or sealing element (10) is wrapped only by the material web (28). Machine according to claim 68,
characterized in that the guide or sealing element (10) is wrapped not only by the material web (28) but also by at least one sieve belt. Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided in a machine section in which there is already a largely dry material web (28). A machine according to claim 71,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided after, preferably immediately after the last drying cylinder (30). Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided in front of and / or in a calender (70). Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided in each case before a roll-up and / or before a roll-off. Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided in a coating machine. Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided in a winder. Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding device is provided as a replacement for a respective spreader roll (50). Machine according to one of the preceding claims,
characterized in that at least one corresponding web guiding or sealing device and / or at least one corresponding application unit (44) is provided directly before and / or after an air dryer. 78. The machine of claim 78.
characterized in that immediately before and / or after an impingement dryer (36, 38) in a dryer section (32) and / or in a coating machine or after-dryer section in each case at least one corresponding web guide or sealing device and / or at least one corresponding application unit (44) is provided.

Images