EP0848106B1 - Press section - Google Patents
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- Publication number
- EP0848106B1 EP0848106B1 EP97119260A EP97119260A EP0848106B1 EP 0848106 B1 EP0848106 B1 EP 0848106B1 EP 97119260 A EP97119260 A EP 97119260A EP 97119260 A EP97119260 A EP 97119260A EP 0848106 B1 EP0848106 B1 EP 0848106B1
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- EP
- European Patent Office
- Prior art keywords
- press
- shoe
- running direction
- nip
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
- D21F3/045—Arrangements thereof including at least one extended press nip
Definitions
- the invention relates to a press section of a machine for producing a Fibrous web, in particular paper and / or cardboard web, with at least two in Web running direction extended press nips, each between a rotating flexible press belt of a shoe press unit and a counter surface are formed, against which the flexible press belt by at least one of the respective Shoe press unit associated press shoe is pressable, the respective Press nip length at least essentially by the measured in the web running direction Press shoe length of the assigned shoe press unit is determined and the Shoe press units to form press gaps of different lengths at least sometimes have different press shoe lengths.
- the aim of the invention is to create a press section of the type mentioned at the beginning, which are kept as simple and compact as possible Shoe press units ensure optimal treatment of the fibrous web.
- the object is achieved according to the invention in that the in The web running direction considers the first press nip generated line force smaller than that in the line pressure generated in the web running direction viewed last is or that that assigned to the first press nip viewed in the direction of web travel Shoe press unit has a press shoe length that is about two to five times as large like that of the shoe press unit, the last one viewed in the direction of web travel Press nip is assigned or that the first viewed in the direction of web travel Press nip associated shoe press unit has a smaller press shoe length than that assigned to the last press nip viewed in the direction of web travel Shoe press unit and a preferably double-felted first shoe press Roller press and a second shoe press follows the roller press.
- this has in the direction of web travel considered the first press nip associated shoe press unit a larger one Press shoe length as the shoe press unit that is viewed in the web travel direction last press nip is assigned.
- a particularly advantageous embodiment of the press section according to the invention is characterized in that three shoe press units are provided that the the shoe press unit associated with the first press nip viewed in the web running direction has a larger press shoe length than the middle shoe press unit and that the Press shoe length of the middle shoe press unit is greater than that of Shoe press unit, the last press nip viewed in the direction of web travel assigned.
- press shoe lengths are in the direction of web travel considers the first press nip associated with the shoe press unit, the middle one Shoe press unit and the last press nip viewed in the direction of web travel assigned shoe press unit in a ratio of 3: 2: 1 to each other.
- these press shoe lengths can also be in a ratio of 3.5: 1.5: 1 to each other.
- the line forces generated in the different press nips can be according to a alternative embodiment variant preferably also at least essentially be the same size.
- a relatively low line force in the first press nip viewed in the web running direction brings the decisive advantage that compact shoe press units and in the case of shoe press rolls, press rolls of smaller diameter are used can be.
- the diameter are less than one meter.
- lubrication of the various shoe press units by oil, water and / or the like can at least partially be different.
- the invention is also applicable to the cases where one respective counter surface is formed by a counter roller and this counter roll several, for example two Shoe press units are assigned.
- Figure 1 shows a purely schematic partial representation Press section 10 of a machine for producing a fibrous web such as in particular a paper and / or cardboard web.
- the press section 10 comprises two elongated in the web running direction L. Press nips 12, 14, each between a rotating flexible press belt 16, 18 of a shoe press unit 20, 22 and a counter surface 24 are formed, against which the flexible Press belt 16, 18 by at least one of the respective Shoe press unit 20, 22 associated press shoe 26, 28 can be pressed is.
- the counter surface 24 is by a common, So-called central counter-roller 30 is formed, the are assigned to two shoe press units 20, 22.
- the respective press nip length is at least essentially by the length of the press shoe measured in the web running direction L. at least one press shoe 26, 28 of the associated Shoe press unit 20, 22 determined.
- the press nips 12, 14 are felted on one side in the present case, why a common, guided over deflection rollers 32, 34 Screen or felt belt 36 is used.
- the shoe press units 20, 22 each formed by a shoe press roll, the all-round flexible press jacket as press belt 16 or 18 serves.
- the shoe press units have 20, 22 different press shoe lengths, so that accordingly Press gaps 12, 14 of different lengths also result.
- the direction of web travel L looks at front press nip 12 associated shoe press unit 20 a larger press shoe length than that in the web running direction L considered rear press nip 22 associated Shoe press unit 22.
- the press shoe length of Shoe press unit 20 for example, two to five times as large like that of the shoe press unit 22.
- the shoe press units 40, 42, 44 are each in turn as Shoe press roll formed, the flexible roll shell as Press belt 16, 18 and 62 is used.
- the resulting three press nips 12, 14, 52 can be felted on one or both sides, whereby in the present If the press nips 12, 52 each have an upper sieve or Felt belt 54 or 58, the press nip 14 a lower wire or Felt belt 56 and the press nip 12 also a lower one Sieve or felt belt 64 is assigned.
- the shoe press units 40, 42, 44 press shoes 26, 28, 60 of different lengths.
- the embodiment has that in the direction of web travel L considers the first press nip 12 associated shoe press unit 40 a larger press shoe length than the middle Shoe press unit 42, while the shoe press length of this middle Shoe press unit 42 is in turn larger than that of the Shoe press unit 44, which is viewed in the web running direction L. last press nip 52 is assigned.
- the line forces generated in the different press nips can either be the same size or at least partially different his. This is advantageously in the direction of web travel considers the first nip generated line force smaller than the last one viewed in the direction of web travel Press nip generated line force, the line forces in The web running direction is preferably viewed from the press nip Press nip can be larger. In addition, the at least the pressure profiles resulting from the various press nips sometimes be different. After all, it is conceivable, at least for the different shoe press units to provide different lubrication in some cases.
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- Paper (AREA)
Description
Die Erfindung betrifft eine Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papier- und/oder Kartonbahn, mit wenigstens zwei in Bahnlaufrichtung verlängerten Preßspalten, die jeweils zwischen einem umlaufenden flexiblen Preßband einer Schuhpreßeinheit und einer Gegenfläche gebildet sind, gegen die das flexible Preßband durch wenigstens einen der jeweiligen Schuhpreßeinheit zugeordneten Preßschuh preßbar ist, wobei die jeweilige Preßspaltlänge zumindest im wesentlichen durch die in Bahnlaufrichtung gemessene Preßschuhlänge der zugeordneten Schuhpreßeinheit bestimmt ist und die Schuhpreßeinheiten zur Bildung unterschiedlich langer Preßspalte zumindest teilweise unterschiedliche Preßschuhlängen besitzen.The invention relates to a press section of a machine for producing a Fibrous web, in particular paper and / or cardboard web, with at least two in Web running direction extended press nips, each between a rotating flexible press belt of a shoe press unit and a counter surface are formed, against which the flexible press belt by at least one of the respective Shoe press unit associated press shoe is pressable, the respective Press nip length at least essentially by the measured in the web running direction Press shoe length of the assigned shoe press unit is determined and the Shoe press units to form press gaps of different lengths at least sometimes have different press shoe lengths.
Die Vorzüge der an sich bekannten Langspaltpressen bestehen u. a. darin, daß der Preßspalt nicht mehr im wesentlichen linienförmig, sondern flächenförmig ist, so daß die noch nasse Faserstoffbahn im Preßspalt über eine längere Strecke dem Preßdruck ausgesetzt ist und damit intensiver entwässert wird. Zudem setzt der Druck im Preßspalt nicht mehr schlagartig ein, dieser kann vielmehr von einem niedrigen Wert beispielsweise kontinuierlich auf einen hohen Wert gebracht werden, wodurch der Gefahr begegnet wird, daß die Faserstoffbahn im Preßspalt verdrückt wird.The advantages of the long-nip presses known per se exist u. a. in that the Press nip is no longer essentially linear, but is flat, so that the still wet fibrous web in the press nip over a longer distance Pressing pressure is exposed and is therefore drained more intensively. In addition, the Pressure in the press nip no longer suddenly, this can be from one low value, for example, continuously brought to a high value, which counteracts the risk that the fibrous web will squeeze in the press nip becomes.
Bei den bisher üblichen Pressenpartien der eingangs genannten Art besitzen die unterschiedlichen Preßspalten zugeordneten Schuhpreßeinheiten gleiche Preßschuhe oder Preßschuhe gleicher Länge, so daß sich in der Pressenpartie Preßspalte gleicher Länge ergeben.In the previously common press sections of the type mentioned have the different shoe press units assigned to different press nips Press shoes or press shoes of the same length, so that in the press section Press gaps of the same length result.
In der EP 0 496 965 und der DE 296 13 944 werden jedoch auch bereits Preßanordnungen mit unterschiedlichen Preßschuhlängen beschrieben. Diese haben allerdings nicht eine Optimierung des Entwässerungsvorganges zum Ziel.In EP 0 496 965 and DE 296 13 944, however, are also already Press arrangements with different press shoe lengths described. Have this but not an optimization of the drainage process to the goal.
Ziel der Erfindung ist es, eine Pressenpartie der eingangs genannten Art zu schaffen, die bei möglichst einfach und kompakt gehaltenem Aufbau der jeweiligen Schuhpreßeinheiten eine optimale Behandlung der Faserstoffbahn gewährleistet.The aim of the invention is to create a press section of the type mentioned at the beginning, which are kept as simple and compact as possible Shoe press units ensure optimal treatment of the fibrous web.
Die Aufgabe wird nach der Erfindung dadurch gelöst, daß die in dem in Bahnlaufrichtung betrachtet ersten Preßspalt erzeugte Linienkraft kleiner als die in dem in Bahnlaufrichtung betrachtet letzten Preßspalt erzeugte Linienkraft ist oder daß die dem in Bahnlaufrichtung betrachtet ersten Preßspalt zugeordnete Schuhpreßeinheit eine Preßschuhlänge besitzt, die etwa zwei- bis fünfmal so groß wie die der Schuhpreßeinheit ist, die dem in Bahnlaufrichtung betrachtet letzten Preßspalt zugeordnet ist oder daß die dem in Bahnlaufrichtung betrachtet ersten Preßspalt zugeordnete Schuhpreßeinheit eine kleinere Preßschuhlänge besitzt als die dem in Bahnlaufrichtung betrachtet letzten Preßspalt zugeordnete Schuhpreßeinheit und auf eine vorzugsweise doppelt befiltzte erste Schuhpresse eine Walzenpresse und auf die Walzenpresse eine zweite Schuhpresse folgt.The object is achieved according to the invention in that the in The web running direction considers the first press nip generated line force smaller than that in the line pressure generated in the web running direction viewed last is or that that assigned to the first press nip viewed in the direction of web travel Shoe press unit has a press shoe length that is about two to five times as large like that of the shoe press unit, the last one viewed in the direction of web travel Press nip is assigned or that the first viewed in the direction of web travel Press nip associated shoe press unit has a smaller press shoe length than that assigned to the last press nip viewed in the direction of web travel Shoe press unit and a preferably double-felted first shoe press Roller press and a second shoe press follows the roller press.
Bei einer alternativen Ausführungsvariante besitzt die dem in Bahnlaufrichtung betrachtet ersten Preßspalt zugeordnete Schuhpreßeinheit eine größere Preßschuhlänge als die Schuhpreßeinheit, die dem in Bahnlaufrichtung betrachtet letzten Preßspalt zugeordnet ist.In the case of an alternative embodiment variant, this has in the direction of web travel considered the first press nip associated shoe press unit a larger one Press shoe length as the shoe press unit that is viewed in the web travel direction last press nip is assigned.
Eine besonders vorteilhafte Ausführungsform der erfindungsgemäßen Pressenpartie zeichnet sich dadurch aus, daß drei Schuhpreßeinheiten vorgesehen sind, daß die dem in Bahnlaufrichtung betrachtet ersten Preßspalt zugeordnete Schuhpreßeinheit eine größere Preßschuhlänge besitzt als die mittlere Schuhpreßeinheit und daß die Preßschuhlänge der mittleren Schuhpreßeinheit größer ist als die der Schuhpreßeinheit, die dem in Bahnlaufrichtung betrachtet letzten Preßspalt zugeordnet ist.A particularly advantageous embodiment of the press section according to the invention is characterized in that three shoe press units are provided that the the shoe press unit associated with the first press nip viewed in the web running direction has a larger press shoe length than the middle shoe press unit and that the Press shoe length of the middle shoe press unit is greater than that of Shoe press unit, the last press nip viewed in the direction of web travel assigned.
Von besonderem Vorteil ist, wenn die Preßschuhlängen der dem in Bahnlaufrichtung betrachtet ersten Preßspalt zugeordneten Schuhpreßeinheit, der mittleren Schuhpreßeinheit und der dem in Bahnlaufrichtung betrachtet letzten Preßspalt zugeordneten Schuhpreßeinheit im Verhältnis 3 : 2 : 1 zueinander stehen. Alternativ können diese Preßschuhlängen auch im Verhältnis 3,5 : 1,5 : 1 zueinander stehen.It is particularly advantageous if the press shoe lengths are in the direction of web travel considers the first press nip associated with the shoe press unit, the middle one Shoe press unit and the last press nip viewed in the direction of web travel assigned shoe press unit in a ratio of 3: 2: 1 to each other. alternative these press shoe lengths can also be in a ratio of 3.5: 1.5: 1 to each other.
Die in den verschiedene Preßspalten erzeugten Linienkräfte können gemäß einer alternativen Ausführungsvariante vorzugsweise zumindest im wesentlichen auch gleich groß sein.The line forces generated in the different press nips can be according to a alternative embodiment variant preferably also at least essentially be the same size.
Sind die in den verschiedenen Preßspalten erzeugten Linienkräfte zumindest teilweise auch unterschiedlich, so sollten die Linienkräfte in Bahnlaufrichtung betrachtet vorzugsweise von Preßspalt zu Preßspalt größer werden.Are the line forces generated in the different press nips at least sometimes also different, so the line forces in the direction of web travel considered preferably to increase from press nip to press nip.
Eine relativ geringe Linienkraft im in Bahnlaufrichtung betrachtet ersten Preßspalt bringt den entscheidenden Vorteil mit sich, daß kompaktere Schuhpreßeinheiten und im Fall von Schuhpreßwalzen Preßwalzen geringeren Durchmessers eingesetzt werden können. Im Fall einer Schuhpreßwalze kann der Durchmesser beispielsweise unter einem Meter liegen.A relatively low line force in the first press nip viewed in the web running direction brings the decisive advantage that compact shoe press units and in the case of shoe press rolls, press rolls of smaller diameter are used can be. In the case of a shoe press roll, for example, the diameter are less than one meter.
Von besonderem Vorteil ist auch, wenn die sich in den verschiedenen Preßspalten ergebenden Druckprofile zumindest teilweise unterschiedlich sind. Hierbei kann es sich sowohl um die sich quer zur Bahnlaufrichtung ergebenden als auch um die sich in Bahnlaufrichtung ergebenden Druckprofile handeln.It is also particularly advantageous if they are in the different press nips resulting pressure profiles are at least partially different. Here it can yourself both around the resulting transverse to the web running direction as well the pressure profiles resulting in the direction of web travel.
Auch die Schmierung der verschiedenen Schuhpreßeinheiten durch Öl, Wasser und/oder dergleichen kann zumindest teilweise unterschiedlich sein.Also the lubrication of the various shoe press units by oil, water and / or the like can at least partially be different.
In den Unteransprüchen sind weitere vorteilhafte Ausführungsvarianten der erfindungsgemäßen Pressenpartie angegeben.Further advantageous design variants are in the subclaims specified the press section according to the invention.
Die Erfindung ist auch auf die Fälle anwendbar, bei denen eine jeweilige Gegenfläche durch eine Gegenwalze gebildet ist und dieser Gegenwalze mehrere, beispielsweise zwei Schuhpreßeinheiten zugeordnet sind.The invention is also applicable to the cases where one respective counter surface is formed by a counter roller and this counter roll several, for example two Shoe press units are assigned.
Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigen:
- Figur 1
- eine schematische Seitenansicht einer Ausführungsform einer Pressenpartie und
- Figur 2
- eine schematische Seitenansicht einer weiteren Ausführungsform einer Pressenpartie.
- Figure 1
- is a schematic side view of an embodiment of a press section and
- Figure 2
- is a schematic side view of another embodiment of a press section.
Figur 1 zeigt in rein schematischer Teildarstellung eine
Pressenpartie 10 einer Maschine zur Herstellung einer Faserstoffbahn
wie insbesondere einer Papier- und/oder Kartonbahn.Figure 1 shows a purely schematic partial
Die Pressenpartie 10 umfaßt zwei in Bahnlaufrichtung L verlängerte
Preßspalte 12, 14, die jeweils zwischen einem umlaufenden
flexiblen Preßband 16, 18 einer Schuhpreßeinheit 20,
22 und einer Gegenfläche 24 gebildet sind, gegen die das flexible
Preßband 16, 18 durch wenigstens einen der jeweiligen
Schuhpreßeinheit 20, 22 zugeordneten Preßschuh 26, 28 preßbar
ist.The
Im vorliegenden Fall ist die Gegenfläche 24 durch eine gemeinsame,
sogenannte zentrale Gegenwalze 30 gebildet, der die
beiden Schuhpreßeinheiten 20, 22 zugeordnet sind.In the present case, the counter surface 24 is by a common,
So-called
Die jeweilige Preßspaltlänge ist zumindest im wesentlichen
durch die in Bahnlaufrichtung L gemessene Preßschuhlänge des
wenigstens einen Preßschuhes 26, 28 der zugeordneten
Schuhpreßeinheit 20, 22 bestimmt.The respective press nip length is at least essentially
by the length of the press shoe measured in the web running direction L.
at least one
Die Preßspalte 12, 14 sind im vorliegenden Fall einseitig befilzt,
wozu ein gemeinsames, über Umlenkwalzen 32, 34 geführtes
Sieb- oder Filzband 36 dient.The
Beim dargestellten Ausführungsbeispiel sind die Schuhpreßeinheiten
20, 22 jeweils durch eine Schuhpreßwalze gebildet, deren
umlaufender flexibler Preßmantel als Preßband 16 bzw. 18
dient.In the illustrated embodiment, the
Wie in Figur 1 zu erkennen ist, besitzen die Schuhpreßeinheiten
20, 22 unterschiedliche Preßschuhlängen, so daß sich entsprechend
auch unterschiedlich lange Preßspalte 12, 14 ergeben.As can be seen in Figure 1, the shoe press units have
20, 22 different press shoe lengths, so that accordingly
Im vorliegenden Fall besitzt die dem in Bahnlaufrichtung L
betrachtet vorderen Preßspalt 12 zugeordnete Schuhpreßeinheit
20 eine größere Preßschuhlänge als die dem in Bahnlaufrichtung
L betrachtet hinteren Preßspalt 22 zugeordnete
Schuhpreßeinheit 22. Hierbei kann die Preßschuhlänge der
Schuhpreßeinheit 20 beispielsweise zwei- bis fünfmal so groß
wie die der Schuhpreßeinheit 22 sein. In the present case, it has the direction of web travel L
looks at
Beim in Figur 2 dargestellten Ausführungsbeispiel sind drei
Schuhpreßeinheiten 40, 42, 44 vorgesehen, denen jeweils eine
die betreffende Gegenfläche 24 bildende Gegenwalze 46, 48, 50
zugeordnet ist.In the embodiment shown in Figure 2 are three
Die Schuhpreßeinheiten 40, 42, 44 sind jeweils wiederum als
Schuhpreßwalze ausgebildet, deren flexibler Walzenmantel als
Preßband 16, 18 bzw. 62 dient.The
Die sich hierbei ergebenden drei Preßspalte 12, 14, 52 können
jeweils einseitig oder doppelt befilzt sein, wobei im vorliegenden
Fall den Preßspalten 12, 52 jeweils ein oberes Sieboder
Filzband 54 bzw. 58, dem Preßspalt 14 ein unteres Sieboder
Filzband 56 und dem Preßspalt 12 zusätzlich ein unteres
Sieb- oder Filzband 64 zugeordnet ist.The resulting three
Während in Bahnlaufrichtung L betrachtet die erste und die
zweite Schuhpreßeinheit 40, 42 jeweils unter der zugeordneten
Gegenwalze 46 bzw. 48 angeordnet ist, ist die dritte
Schuhpreßeinheit 44 oberhalb der zugeordneten Gegenwalze 50
vorgesehen.While looking in the web running direction L the first and the
second
Auch in diesem Fall besitzen die Schuhpreßeinheiten 40, 42,
44 Preßschuhe 26, 28, 60 unterschiedlicher Länge. Beim dargestellten
Ausführungsbeispiel besitzt die dem in Bahnlaufrichtung
L betrachtet ersten Preßspalt 12 zugeordnete Schuhpreßeinheit
40 eine größere Preßschuhlänge als die mittlere
Schuhpreßeinheit 42, während die Schuhpreßlänge dieser mittleren
Schuhpreßeinheit 42 wiederum größer ist als die der
Schuhpreßeinheit 44, die dem in Bahnlaufrichtung L betrachtet
letzten Preßspalt 52 zugeordnet ist. In this case too, the
Die in den verschiedenen Preßspalten erzeugten Linienkräfte können entweder gleich groß oder zumindest teilweise unterschiedlich sein. Vorteilhafterweise ist die in dem in Bahnlaufrichtung betrachtet ersten Preßspalt erzeugte Linienkraft kleiner als die in dem in Bahnlaufrichtung betrachtet letzten Preßspalt erzeugte Linienkraft, wobei die Linienkräfte in Bahnlaufrichtung betrachtet vorzugsweise von Preßspalt zu Preßspalt größer werden können. Zudem können auch die sich in den verschiedenen Preßspalten ergebenden Druckprofile zumindest teilweise unterschiedlich sein. Schließlich ist es auch denkbar, für die verschiedenen Schuhpreßeinheiten eine zumindest teilweise unterschiedliche Schmierung vorzusehen. The line forces generated in the different press nips can either be the same size or at least partially different his. This is advantageously in the direction of web travel considers the first nip generated line force smaller than the last one viewed in the direction of web travel Press nip generated line force, the line forces in The web running direction is preferably viewed from the press nip Press nip can be larger. In addition, the at least the pressure profiles resulting from the various press nips sometimes be different. After all, it is conceivable, at least for the different shoe press units to provide different lubrication in some cases.
- 1010
- Pressenpartiepress section
- 1212
- Preßspaltnip
- 1414
- Preßspaltnip
- 1616
- Preßbandpress belt
- 1818
- Preßbandpress belt
- 2020
- Schuhpreßeinheitshoe press
- 2222
- Schuhpreßeinheitshoe press
- 2424
- Gegenflächecounter surface
- 2626
- Preßschuhpress shoe
- 2828
- Preßschuhpress shoe
- 3030
- Gegenwalzebacking roll
- 3232
- Umlenkwalzedeflecting
- 3434
- Umlenkwalzedeflecting
- 3636
- Sieb- oder FilzbandSieve or felt belt
- 3838
- Preßspaltnip
- 4040
- Schuhpreßeinheitshoe press
- 4242
- Schuhpreßeinheitshoe press
- 4444
- Schuhpreßeinheitshoe press
- 4646
- Gegenwalzebacking roll
- 4848
- Gegenwalzebacking roll
- 5050
- Gegenwalzebacking roll
- 5252
- Preßspaltnip
- 5454
- Sieb- oder FilzbandSieve or felt belt
- 5656
- Sieb- oder FilzbandSieve or felt belt
- 5858
- Sieb- oder FilzbandSieve or felt belt
- 6060
- Preßschuhpress shoe
- 6262
- Preßbandpress belt
- 6464
- Sieb- oder FilzbandSieve or felt belt
- LL
- BahnlaufrichtungWeb direction
Claims (14)
- A press section (10) for a machine for producing a fibrous web, in particular a paper and/or board web, having at least two press nips (12, 14, 52) which are extended in the web running direction (L) and in each case are formed between a circulating flexible press belt (16, 18, 62) belonging to a shoe press unit (20, 22, 40, 42, 44) and a mating surface (24), against which the flexible press belt (16, 18, 62) can be pressed by means of at least one press shoe (26, 28, 60) that is associated with the respective shoe press unit (20, 22, 40, 42, 44), the respective press nip length being at least substantially determined by the press shoe length, measured in the web running direction (L), of the associated shoe press unit (20, 22, 40, 42, 44), and the shoe press units (20, 22, 40, 42, 44) at least partly having different press shoe lengths in order to form press nips (12, 14, 52) of different lengths, characterized in that the line force produced in the first press nip (12), as considered in the web running direction (L), is lower than the line force produced in the last press nips (52), as considered in the web running direction (L).
- A press section (10) for a machine for producing a fibrous web, in particular a paper and/or board web, having at least two press nips (12, 14, 52) which are extended in the web running direction (L) and in each case are formed between a circulating flexible press belt (16, 18, 62) belonging to a shoe press unit (20, 22, 40, 42, 44) and a mating surface (24), against which the flexible press belt (16, 18, 62) can be pressed by means of at least one press shoe (26, 28, 60) that is associated with the respective shoe press unit (20, 22, 40, 42, 44), the respective press nip length being at least substantially determined by the press shoe length, measured in the web running direction (L), of the associated shoe press unit (20, 22, 40, 42, 44), and the shoe press units (20, 22, 40, 42, 44) at least partly having different press shoe lengths in order to form press nips (12, 14, 52) of different lengths, characterized in that the shoe press unit (20, 40) associated with the first press nip (12), as considered in the web running direction (L), has a press shoe length which is about two to five times as great as that of the shoe press unit (22, 44) which is associated with the last press nip (14, 52), as considered in the web running direction (L).
- A press section (10) for a machine for producing a fibrous web, in particular a paper and/or board web, having at least two press nips (12, 14, 52) which are extended in the web running direction (L) and in each case are formed between a circulating flexible press belt (16, 18, 62) belonging to a shoe press unit (20, 22, 40, 42, 44) and a mating surface (24), against which the flexible press belt (16, 18, 62) can be pressed by means of at least one press shoe (26, 28, 60) that is associated with the respective shoe press unit (20, 22, 40, 42, 44), the respective press nip length being at least substantially determined by the press shoe length, measured in the web running direction (L), of the associated shoe press unit (20, 22, 40, 42, 44), and the shoe press units (20, 22, 40, 42, 44) at least partly having different press shoe lengths in order to form press nips (12, 14, 52) of different lengths, characterized in that the shoe press unit (20, 40) associated with the first press nip (12), as considered in the web running direction (L), has a smaller press shoe length than the shoe press unit (22, 44) which is associated with the last press nip (14, 52), as considered in the web running direction (L), and a preferably double-felted first shoe press is followed by a roll press, and the roll press is followed by a second shoe press.
- Press section according to one of the preceding claims, characterized in that in order to form at least three press nips (12, 14, 52) that are extended in the web running direction (L), at least three shoe press units (40, 42, 44) are provided.
- Press section according to Claim 1 or 2 and Claim 4, characterized in that three shoe press units (40, 42, 44) are provided, in that the shoe press unit (40) associated with the first press nip (12), as considered in the web running direction (L), has a greater press shoe length than the middle shoe press unit (42), and in that the press shoe length of the middle shoe press unit (42) is greater than that of the shoe press unit (44) which is associated with the last press nip (52), as considered in the press running direction (L).
- Press section according to Claim 5, characterized in that the press shoe lengths of the shoe press unit (40) associated with the first press nip (12), as considered in the web running direction (L), of the middle shoe press unit (42) and of the shoe press unit associated with the last press nip (52), as considered in the web running direction (L), are in the ratio 3 : 2 : 1 to one another.
- Press section according to Claim 5, characterized in that the press shoe lengths of the shoe press unit (40) associated with the first press nip (12), as considered in the web running direction (L), of the middle shoe press unit (42) and of the shoe press unit (44) associated with the last press nip (52), as considered in the web running direction (L), are in the ratio 3.5 : 1.5 : 1 to one another.
- Press section according to one of Claims 2 to 7, characterized in that the line forces produced in the various press nips (12, 14, 52) are at least substantially equal.
- Press section according to one of Claims 1 to 7, characterized in that the line forces produced in the various press nips (12, 14, 52) are at least partly different.
- Press section according to Claim 9, characterized in that the line force produced in the first press nip (12), as considered in the web running direction (L), is less than the line force produced in the last press nip (52), as considered in the web running direction (L), the line forces preferably becoming greater from press nip to press nip, as considered in the web running direction (L).
- Press section according to one of the preceding claims, characterized in that the pressure profiles resulting in the various press nips (12, 14, 52) are at least partly different.
- Press section according to one of the preceding claims, characterized in that the lubrication of the various shoe press units (40, 42, 44) is at least partly different.
- Press section according to one of Claims 1 or 2 and 5-7, characterized in that a preferably double-felted first shoe press is followed by a roll press, and the roll press is followed by a second shoe press.
- Press section according to Claim 13, characterized in that the first and the second shoe press each possess a press nip that is extended in the web running direction, and the press nip of the second shoe press is shorter than that of the first.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19652018A DE19652018A1 (en) | 1996-12-13 | 1996-12-13 | Press section |
| DE19652018 | 1996-12-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0848106A1 EP0848106A1 (en) | 1998-06-17 |
| EP0848106B1 true EP0848106B1 (en) | 2002-06-19 |
Family
ID=7814692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97119260A Expired - Lifetime EP0848106B1 (en) | 1996-12-13 | 1997-11-04 | Press section |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6210530B1 (en) |
| EP (1) | EP0848106B1 (en) |
| JP (1) | JPH10168776A (en) |
| DE (2) | DE19652018A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW562831B (en) * | 1997-12-12 | 2003-11-21 | Denki Kagaku Kogyo Kk | Curable resin composition, adhesive composition, bonded product, and bonding method |
| EP0950759A3 (en) | 1998-04-15 | 2000-11-29 | Voith Sulzer Papiertechnik Patent GmbH | Pressing arrangement |
| DE19827483A1 (en) * | 1998-06-19 | 1999-12-23 | Voith Sulzer Papiertech Patent | Press assembly for water extraction from a wet fiber web |
| DE19816759A1 (en) * | 1998-04-16 | 1999-10-21 | Voith Sulzer Papiertech Patent | Press assembly |
| DE19840023A1 (en) * | 1998-09-02 | 2000-03-09 | Voith Sulzer Papiertech Patent | Press arrangement |
| DE19962706A1 (en) * | 1999-12-23 | 2001-06-28 | Voith Paper Patent Gmbh | Press section |
| DE10137527A1 (en) * | 2001-08-01 | 2003-02-13 | Voith Paper Patent Gmbh | Rotogravure paper manufacturing assembly has additional press slits |
| DE10157694B4 (en) * | 2001-11-24 | 2007-04-12 | Voith Patent Gmbh | Glättzylinderanordnung |
| FI116400B (en) * | 2002-11-19 | 2005-11-15 | Metso Paper Inc | Press section in a paper or cardboard machine |
| FI117981B (en) * | 2002-12-20 | 2007-05-15 | Upm Kymmene Corp | Pinching arrangement for a paper machine or the like |
| BR0318220A (en) * | 2003-03-31 | 2006-03-21 | Pmt Italia Spa | press-type device for removing water from a screen |
| DE102010031320A1 (en) * | 2010-07-14 | 2012-01-19 | Voith Patent Gmbh | Machine with a press section and method for producing a fibrous web |
| US9523173B1 (en) * | 2013-04-09 | 2016-12-20 | Pmt Italia S.L.A. | Press apparatus |
| TWI699060B (en) * | 2017-02-03 | 2020-07-11 | 日商新川股份有限公司 | Wiring structure |
| DE102018119383A1 (en) * | 2018-08-09 | 2020-02-13 | Voith Patent Gmbh | Machine and method for producing a corrugated base paper web |
| DE102019116602A1 (en) * | 2019-06-19 | 2020-12-24 | Voith Patent Gmbh | MACHINE FOR THE MANUFACTURE OF A FIBER WEB |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI842115A (en) * | 1984-05-25 | 1985-11-26 | Valmet Oy | PRESS SPEAKER PRESS NYP I EN PAPPERSMASKIN. |
| DE4042480C2 (en) * | 1990-08-17 | 2000-02-10 | Voith Gmbh J M | Press section of a paper machine |
| DE4102356C1 (en) | 1991-01-26 | 1992-01-23 | J.M. Voith Gmbh, 7920 Heidenheim, De | |
| DE4301750C2 (en) * | 1993-01-23 | 1996-10-10 | Voith Gmbh J M | Method and device for dewatering a web using presses |
| DE4340041A1 (en) * | 1993-11-24 | 1994-04-07 | Voith Gmbh J M | Paper-making machine press section - has two sections with a web transport roller between the shoe presses for consistent character on both sides of the web |
| FI95610C (en) * | 1994-10-06 | 1996-02-26 | Valmet Paper Machinery Inc | Press section of a paper machine equipped with a compensating press |
| DE29613944U1 (en) * | 1996-04-03 | 1996-10-24 | Voith Sulzer Papiermasch Gmbh | Roller press |
-
1996
- 1996-12-13 DE DE19652018A patent/DE19652018A1/en not_active Withdrawn
-
1997
- 1997-11-04 EP EP97119260A patent/EP0848106B1/en not_active Expired - Lifetime
- 1997-11-04 DE DE59707554T patent/DE59707554D1/en not_active Expired - Lifetime
- 1997-12-11 JP JP9341488A patent/JPH10168776A/en active Pending
- 1997-12-12 US US08/989,916 patent/US6210530B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0848106A1 (en) | 1998-06-17 |
| JPH10168776A (en) | 1998-06-23 |
| DE19652018A1 (en) | 1998-06-18 |
| DE59707554D1 (en) | 2002-07-25 |
| US6210530B1 (en) | 2001-04-03 |
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