EP0778912B1 - Device for coating a material web on both sides - Google Patents
Device for coating a material web on both sides Download PDFInfo
- Publication number
- EP0778912B1 EP0778912B1 EP95925833A EP95925833A EP0778912B1 EP 0778912 B1 EP0778912 B1 EP 0778912B1 EP 95925833 A EP95925833 A EP 95925833A EP 95925833 A EP95925833 A EP 95925833A EP 0778912 B1 EP0778912 B1 EP 0778912B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- web
- roller
- nip
- rollers
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
Definitions
- the invention relates to a device for coating a material web on both sides, in particular a paper or cardboard web, according to the preamble of Claim 1.
- Pigment dispersions on paper or cardboard webs are devices with two axially parallel side by side in a frame rotatably mounted press rolls known between which a press nip is formed through which the paper or cardboard web to be led.
- An application and metering system is arranged on each of the press rolls, that first applies a metered film of coating material to its jacket, which is then transferred to the web in the press nip.
- one of the two press rollers can be moved circumferentially against the other stored in order to be able to open the press nip for drawing in a new web.
- From DE-A 37 01 670 is an applicator with an applicator roller and one Track leading counter roll known for single-sided coating or Humidification of running webs can be used.
- On the applicator roller is a pre-metering roller for transferring coating compound or dampening liquid arranged, each on the between the applicator roller and counter roller guided train will be handed over.
- the counter roller is on a swivel lever adjustable parallel to the web running direction, so that the wrap angle of the Application roller and the counter roller when coating differently than when moistening can be adjusted.
- the pulling behavior of the web from the press rolls is not only the above described features of the coating device, but also of process parameters such as the order quantity and the physical parameters of the web and of the coating material depends crucially in the known devices when changing raw materials (web and / or coating material) unstable conditions when withdrawing from the press rolls with the above described negative effects occur. So the path can be unstable if, after a grade change, with the unrolled press roller a coating material with considerably greater cohesive and adhesive forces is applied, due to which the web is local or completely untwisted Press roller is entrained.
- the invention has for its object a generic coating device to improve so that even coating changing web and / or coating materials can be achieved.
- the invention offers the possibility of using a wide variety of web and coating materials a stable web take-off from the press rolls by changing to be able to adjust the wrapping ratio on the press rolls.
- Figure 1 shows a side view of a coating device in which the press rolls are set so that the web one of the two press rollers on the discharge side slightly wraps around.
- Figure 2 shows the same device in a position in which by adjusting a Press roller is slightly wrapped around the other press roller on the discharge side.
- the coating device shown in the drawing is in a paper machine integrated. It consists of two axially parallel to each other in a frame 1 rotatable stored press rolls 2, 3, one of which (press roll 2) stationary, the other (Press roll 3) is mounted with its circumference movable against the circumference of the first press roll 2.
- press roll 2 stationary
- Press roll 3 is mounted with its circumference movable against the circumference of the first press roll 2.
- the present example is the press roller 3 between two lateral pivot levers 4 suspended by a piston-cylinder unit 5 about a pivot axis 6 in Direction to the press roller 2 and pivoted away from this in the frame 1 are.
- the press rolls 2, 3 are rubberized on their outer surface. When swiveling the press roll 3 against the press roll 2 forms a press nip 7, which the to be coated Paper web 8 is fed from above by a guide roller 9.
- Each application and metering system 10, 11 preferably has one respective press roller 2, 3 open application chamber, in the coating material is fed under pressure.
- Each order chamber of completed a metering element that applied to the press roll 2, 3 Strips the coating material down to the desired film thickness.
- a dosing element preference is given to a doctor rod with structured, ie elevations and depressions surface with which volumetric dosing can be used. Such doctor rods are known. You assign z. B. circumferential grooves on by Wrapping can be generated with a wire or by surface processing. Alternatively, doctor rods with a smooth surface, Scraper knives or scraper bars are used.
- the metered coating material applied to the outer surfaces of the press rolls 2, 3 is transferred to web 8 in press nip 7. After going through of the press nip 7, the web 8 coated on both sides becomes non-contact working guide element 12 fed to a dryer, not shown.
- the adjustability is effected in that the pivotable Press roll 3 is additionally mounted in a height-adjustable manner.
- access the in a linear guide swivel bearing 13 a piston-cylinder unit supported on the ground 14 with which the swivel lever 4 can be adjusted up and down leaves.
- the press roller 3 is on an adjustable path against the stationary Press roller 2 can be swiveled. Raising the pivot lever 4 causes the position of the press nip 7 moves upwards.
- the changed position of the Press nip leads to a wrapping of the press roll 2 on the outlet side of the Lane 8 ( Figure 2).
- lowering the pivot lever 4 leads to a Displacement of the press nip 7 downwards and therefore to the fact that the press roll 3 on the outlet side is partially wrapped in the web 8 ( Figure 1).
- the maximum stroke of the piston-cylinder unit 14 and the length of the pivot levers 4 are chosen so that when the piston is half extended, the path is straight without Wrapping a press roll 2, 3 passes through the press nip 7.
- the stroke length of the Piston-cylinder unit 14 is dimensioned so that when the piston is retracted Press roller 3 is lowered so far that the connecting line between the two Axes of rotation of the press rolls 2, 3 about the axis of rotation of the press roll 2 by 5 ° - 10 ° pivots ( Figure 1). In this position, the swivel-mounted press roll 3 slightly wrapped around by the web 8 on the outlet side of the press nip 7.
Landscapes
- Coating Apparatus (AREA)
- Paper (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum beidseitigen Beschichten einer Materialbahn,
insbesondere einer Papier- oder Kartonbahn, gemäß dem Oberbegriff des
Patentanspruchs 1.The invention relates to a device for coating a material web on both sides,
in particular a paper or cardboard web, according to the preamble of
Zum beidseitigen Auftragen von Leim, Stärke, CMC, synthetischem Leim oder Pigmentdispersionen auf Papier- oder Kartonbahnen sind Vorrichtungen mit zwei achsparallel nebeneinander in einem Gestell drehbar gelagerten Presswalzen bekannt, zwischen denen ein Preßspalt ausgebildet ist, durch den die Papier- oder Kartonbahn geführt wird. An jeder der Presswalzen ist ein Auftrag- und Dosiersystem angeordnet, das einen dosierten Film von Beschichtungsmaterial zunächst auf deren Mantel aufträgt, der anschließend in dem Preßspalt an die Bahn übergeben wird. Bekannterweise ist eine der beiden Presswalzen umfänglich gegen die andere bewegbar gelagert, um den Preßspalt zum Einziehen einer neuen Bahn öffnen zu können.For applying glue, starch, CMC, synthetic glue or on both sides Pigment dispersions on paper or cardboard webs are devices with two axially parallel side by side in a frame rotatably mounted press rolls known between which a press nip is formed through which the paper or cardboard web to be led. An application and metering system is arranged on each of the press rolls, that first applies a metered film of coating material to its jacket, which is then transferred to the web in the press nip. As is well known one of the two press rollers can be moved circumferentially against the other stored in order to be able to open the press nip for drawing in a new web.
Bei der gattungsgemäßen Vorrichtung nach der DE-C 34 40 634 ist eine der Presswalzen gegen die andere schwenkbar gelagert. Aus dem Preßspalt heraus wird die Bahn von Bahnführungselementen, z. B. Leitwalzen, den nachfolgenden Verarbeitungsstationen, z. B. einem Trockner, zugeführt. In the generic device according to DE-C 34 40 634 is one of the press rolls pivoted against the other. Out of the press nip Web of web guide elements, e.g. B. guide rollers, the subsequent processing stations, e.g. B. a dryer supplied.
Für ein optimales Beschichtungsergebnis hat es sich als sehr wichtig gezeigt, daß die beschichtete Papier- oder Kartonbahn von den Oberflächen der beiden Presswalzen mit einem stabilen, sich nicht ändernden Bahnverlauf abgezogen wird. Die von Kohäsions- und Adhäsionskräften an den Walzen gehaltene Bahn muß möglich gleichmäßig zunächst von der einen, dann von der zweiten Walze abgezogen werden, ohne daß ein unkontrollierter Bahnverlauf, d. h. ein Bahnflattern zwischen den beiden Presswalzen, entsteht. Ein unkontrollierter Bahnverlauf führt zu nachteilhaften Oberflächenmarkierungen.For an optimal coating result, it has proven to be very important that the coated paper or cardboard web from the surfaces of the two press rollers is subtracted with a stable, unchanging path. The of Cohesive and adhesive forces on the web held on the rollers must be possible are evenly drawn off from one roller, then from the second roller, without an uncontrolled path, i. H. a web flutter between the two Press rolls, arises. An uncontrolled course of the path leads to disadvantageous ones Surface markings.
Um die Bahn kontrolliert zunächst von der einen, dann von der anderen Presswalze abzuziehen, ist es bekannt, mit unterschiedlichen Materialien auf den Oberflächen der Presswalzen die beim Abziehen der Bahn wirkenden Adhäsionskräfte gezielt zu beeinflussen. Die Lösung hat jedoch den Nachteil, daß die unterschiedlichen Walzenoberflächen auch zu qualitativ unterschiedlichen Strichergebnissen auf beiden Bahnseiten führen können.Controlled around the web first by one, then by the other press roller subtract, it is known to use different materials on the surfaces of the Press rollers to specifically influence the adhesive forces when the web is pulled off. However, the solution has the disadvantage that the different roller surfaces also to qualitatively different stroke results on both sides of the web being able to lead.
Eine weitere bekannte Möglichkeit besteht darin, die Bahn nach dem Preßspalt auf einer der beiden Presswalzen unter einem bestimmten Umschlingungswinkel weiterzuführen (DE-C 34 40 634). Erfahrungsgemäß muß dabei eine bestimmte Bahnzugkraft bei einem nicht zu großen Umschlingungswinkel eingestellt werden.Another known possibility is to open the web after the press nip to continue one of the two press rolls at a certain wrap angle (DE-C 34 40 634). Experience has shown that there must be a certain web tension if the wrap angle is not too large.
Aus der DE-A 37 01 670 ist ein Auftragwerk mit einer Auftragwalze und einer die Bahn führenden Gegenwalze bekannt, das zum einseitigen Beschichten oder zum Befeuchten laufender Warenbahnen eingesetzt werden kann. An der Auftragwalze ist eine Vordosierwalze zur Übertragung von Beschichtungsmasse oder Befeuchtungsflüssigkeit angeordnet, die jeweils auf die zwischen der Auftragwalze und Gegenwalze geführte Bahn übergeben werden. Die Gegenwalze ist an einem Schwenkhebel parallel zur Bahnlaufrichtung verstellbar gelagert, damit der Umschlingswinkel der Auftragwalze und der Gegenwalze beim Beschichten anders als beim Befeuchten eingestellt werden kann. From DE-A 37 01 670 is an applicator with an applicator roller and one Track leading counter roll known for single-sided coating or Humidification of running webs can be used. On the applicator roller is a pre-metering roller for transferring coating compound or dampening liquid arranged, each on the between the applicator roller and counter roller guided train will be handed over. The counter roller is on a swivel lever adjustable parallel to the web running direction, so that the wrap angle of the Application roller and the counter roller when coating differently than when moistening can be adjusted.
Da das Abzugsverhalten der Bahn von den Presswalzen nicht nur von den vorstehend beschriebenen Merkmalen der Beschichtungsvorrichtung, sondern auch von Prozeßparametern wie der Auftragmenge und den physikalischen Parametern der Bahn und des Beschichtungsmaterials entscheidend abhängt, können bei den bekannten Vorrichtungen bei einem Wechsel von Rohstoffen (Bahn- und/oder Beschichtungsmaterial) instabile Verhältnisse beim Abzug von den Presswalzen mit den vorstehend beschriebenen negativen Auswirkungen auftreten. So kann der Bahnverlauf instabil werden, wenn nach einer Sortenumstellung mit der nicht umschlungenen Presswalze ein Beschichtungsmaterial mit erheblich größeren Kohäsions- und Adhäsionskräften aufgetragen wird, aufgrund derer die Bahn lokal oder komplett von der nicht umschlungenen Presswalze mitgerissen wird.Since the pulling behavior of the web from the press rolls is not only the above described features of the coating device, but also of process parameters such as the order quantity and the physical parameters of the web and of the coating material depends crucially in the known devices when changing raw materials (web and / or coating material) unstable conditions when withdrawing from the press rolls with the above described negative effects occur. So the path can be unstable if, after a grade change, with the unrolled press roller a coating material with considerably greater cohesive and adhesive forces is applied, due to which the web is local or completely untwisted Press roller is entrained.
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Beschichtungsvorrichtung so zu verbessern, daß sich eine gleichmäßige Beschichtung auch bei wechselnden Bahn- und/oder Beschichtungsmaterialien erzielen läßt.The invention has for its object a generic coating device to improve so that even coating changing web and / or coating materials can be achieved.
Diese Aufgabe wird mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with the features of
Die Erfindung bietet die Möglichkeit, bei unterschiedlichsten Bahn- und Beschichtungsmaterialien einen stabilen Bahnabzug von den Presswalzen durch Veränderung der Umschlingungsverhältnisse an den Presswalzen einstellen zu können.The invention offers the possibility of using a wide variety of web and coating materials a stable web take-off from the press rolls by changing to be able to adjust the wrapping ratio on the press rolls.
Die Unteransprüche enthalten bevorzugte, da besonders vorteilhafte Ausgestaltungen der Erfindung.The subclaims contain preferred, since particularly advantageous, configurations the invention.
Die Zeichnung dient zur Erläuterung der Erfindung anhand eines vereinfacht dargestellten Ausführungsbeispiels.The drawing serves to explain the invention using a simplified representation Embodiment.
Figur 1 zeigt in Seitenansicht eine Beschichtungsvorrichtung, bei der die Presswalzen so eingestellt sind, daß die Bahn eine der beiden Presswalzen an der Ablaufseite geringfügig umschlingt.Figure 1 shows a side view of a coating device in which the press rolls are set so that the web one of the two press rollers on the discharge side slightly wraps around.
Figur 2 zeigt dieselbe Vorrichtung in einer Position, bei der durch Verstellung einer Presswalze die andere Presswalze an der Ablaufseite geringfügig umschlungen wird.Figure 2 shows the same device in a position in which by adjusting a Press roller is slightly wrapped around the other press roller on the discharge side.
Die in der Zeichnung dargestellte Beschichtungsvorrichtung ist in eine Papiermaschine
integriert. Sie besteht aus zwei achsparallel nebeneinander in einem Gestell 1 drehbar
gelagerten Presswalzen 2, 3, von denen eine (Presswalze 2) ortsfest, die andere
(Presswalze 3) mit ihrem Umfang gegen dem Umfang der ersten gegen Presswalze 2 bewegbar gelagert ist. Im
vorliegenden Beispiel ist die Presswalze 3 zwischen zwei seitlichen Schwenkhebeln 4
aufgehängt, die mittels einer Kolben-Zylinder-Einheit 5 um eine Schwenkachse 6 in
Richtung zur Presswalze 2 und von dieser weg schwenkbar im Gestell 1 gelagert
sind. Die Presswalzen 2, 3 sind auf ihrer Mantelfläche gummiert. Beim Anschwenken
der Presswalze 3 gegen die Presswalze 2 bildet sich ein Preßspalt 7, dem die zu beschichtende
Papierbahn 8 von einer Leitrolle 9 von oben zugeführt wird.The coating device shown in the drawing is in a paper machine
integrated. It consists of two axially parallel to each other in a
Außerhalb des Bereichs des Preßspalts 7 ist an jeder Presswalze 2, 3 ein Auftragund
Dosiersystem 10, 11 angeordnet, das an die jeweilige Presswalze 2, 3 anschwenkbar
ist. Bevorzugt weist jedes Auftrag- und Dosiersystem 10, 11 eine zur
jeweiligen Presswalze 2, 3 hin offene Auftragkammer auf, in die Beschichtungsmaterial
unter Druck zugeführt wird. Auslaufseitig wird jede Auftragkammer von
einem Dosierelement abgeschlossen, das das auf die Presswalze 2, 3 aufgetragene
Beschichtungsmaterial bis auf die gewünschte Filmdicke abstreift. Als Dosierelement
wird bevorzugt eine Rakelstange mit strukturierter, also Erhebungen und Vertiefungen
aufweisender Oberfläche eingesetzt, mit der volumetrisch dosiert werden kann.
Derartige Rakelstangen sind bekannt. Sie weisen z. B. Umfangsrillen auf, die durch
Umwickeln mit einem Draht oder durch Oberflächenbearbeitung erzeugt werden.
Alternativ können als Dosierelemente auch Rakelstangen mit glatter Oberfläche,
Schabermesser oder Schaberleisten eingesetzt werden.Outside the area of the
Das dosiert auf die Mantelflächen der Presswalzen 2, 3 aufgetragene Beschichtungsmaterial
wird im Preßspalt 7 an die Bahn 8 übergeben. Nach dem Durchlaufen
des Preßspalts 7 wird die beidseitig beschichtete Bahn 8 von einem berührungslos
arbeitenden Leitelement 12 einem nicht dargestellten Trockner zugeführt.The metered coating material applied to the outer surfaces of the
Um verschiedene Umschlingungsverhältnisse der Bahn 8 an den Presswalzen 2, 3
ohne Veränderung des übrigen Bahnverlaufs einstellen zu können, ist eine der beiden
Presswalzen 2, 3, bevorzugt - wie beim Ausführungsbeispiel dargestellt - die
schwenkbar gelagerte Presswalze 3 um eine Komponente in Richtung der gemeinsamen
Tangente an die beiden Presswalzen 2, 3 im Preßspalt 7 verstellbar gelagert. To different wrapping conditions of the
Im Ausführungsbeispiel wird die Verstellbarkeit dadurch bewirkt, daß die schwenkbare
Presswalze 3 zusätzlich höhenverstellbar gelagert ist. Dazu greift an dem in
einer Linearführung geführten Schwenklager 13 eine am Boden abgestützte Kolben-Zylinder-Einheit
14 an, mit der sich der Schwenkhebel 4 nach oben und unten verstellen
läßt. Die Presswalze 3 ist so auf einer verstellbaren Bahn gegen die ortsfeste
Presswalze 2 anschwenkbar. Eine Anhebung des Schwenkhebels 4 bewirkt, daß sich
die Position des Preßspalts 7 nach oben verschiebt. Die veränderte Position des
Preßspalts führt zu einer Umschlingung der Presswalze 2 an der Auslaufseite der
Bahn 8 (Figur 2). Analog führt eine Absenkung des Schwenkhebels 4 zu einer
Verschiebung des Preßspalts 7 nach unten und somit dazu, daß die Presswalze 3 an
der Auslaufseite teilweise von der Bahn 8 umschlungen wird (Figur 1).In the exemplary embodiment, the adjustability is effected in that the
Der maximale Hub der Kolben-Zylinder-Einheit 14 und die Länge der Schwenkhebel 4
sind so gewählt, daß bei zur Hälfte ausgefahrenem Kolben die Bahn gradlinig ohne
Umschlingung einer Presswalze 2, 3 den Preßspalt 7 durchläuft. Die Hublänge der
Kolben-Zylinder-Einheit 14 ist so bemessen, daß beim Einfahren des Kolbens die
Presswalze 3 soweit abgesenkt wird, daß die Verbindungslinie zwischen den beiden
Drehachsen der Presswalzen 2, 3 um die Drehachse der Preßwalze 2 um 5° - 10°
abschwenkt (Figur 1). In dieser Position wird die schwenkbar gelagerte Preßwalze 3
an der Auslaufseite des Preßspalts 7 geringfügig von der Bahn 8 umschlungen. Bei
maximal ausgefahrenen Kolben der Kolben-Zylinder-Einheit 14 wird die Presswalze 3
soweit angehoben, daß die Verbindungslinie zwischen den beiden Drehachsen der
Presswalzen 2, 3 um 5° - 10° gegenüber der Position mit gradlinig durchlaufender
Bahn 8 nach oben geschwenkt ist (Figur 2). In dieser Position wird die ortsfest
gelagerte Presswalze 2 auf der Auslaufseite des Preßspalts 7 geringfügig von der
Bahn 8 umschlungen.The maximum stroke of the piston-
Bei der in Figur 1 gezeigten Position wird die Bahn zunächst von der Presswalze 2
und anschließend von der Presswalze 3 abgezogen. Wird nun nach einem Sortenwechsel
mit der Presswalze 2 ein Beschichtungsmaterial mit größerer Kohäsion und
Adhäsion aufgetragen als das von der Presswalze 3 aufgetragene Beschichtungsmaterial,
so würde dies zu einem instabilen Bahnverlauf führen: Die Kohäsions- und
Adhäsionskräfte halten die Bahn 8 länger an der Presswalze 2, die Bahnführung mit
der geringfügigen Umschlingung der Presswalze 3 hält die Bahn länger an der
Presswalze 3. Die Haltekräfte sind somit entgegengesetzt. Um in dieser Situation den
Bahnverlauf wieder zu stabilisieren, wird die Presswalze 3 in die in Figur 2 gezeigte
Stellung angehoben. Dabei ändert sich die Bahnführung so, daß nun die Presswalze 2
geringfügig auf der Auslaufseite des Preßspalts 7 umschlungen ist. Die aus der
Bahnführung resultierenden Kräfte wirken nun ebenso wie die Kohäsions- und
Adhäsionskräfte dahingehend, die Bahn länger auf der Presswalze 2 zu halten. Der
Bahnverlauf ist stabil, da die Bahn 8 eindeutig zunächst von der Presswalze 3, dann
von der Presswalze 2 abgezogen wird.In the position shown in FIG. 1, the web is first of all pressed by the
Claims (4)
- Device for coating a material web (8), in particular a paper or cardboard web, on both sides, with two press rollers (2, 3) which are rotatably mounted axially parallel next to one another in a stand (1) and of which one press roller (3) is mounted so as to be capable of being moved with its circumference against the circumference of the other press roller (2), so as to form a press nip (7), through which the material web (8) is guided, and with an applicator and metering system (10, 11) for each press roller (2, 3), the said systems being arranged in each case outside the region of the press nip (7), one of the two press rollers (3) being mounted so as to be capable of being adjusted with one component in the direction of the common tangent to the two press rollers (2, 3) in the press nip (7), so as to displace the position of the press nip (7).
- Device according to Claim 1, characterized in that one of the two press rollers (3) is mounted so as to be capable of being vertically adjusted linearly
- Device according to Claim 1 or 2, characterized in that one press roller (2) is mounted fixedly, and the other press roller (3) is mounted so as to be capable of being circumferentially pivoted with its circumference, on adjustable paths, against the circumference of the fixedly mounted press roller (2).
- Device according to one of Claims 1 to 3, characterized in that the adjustment travel of the adjusting movement is designed in such a way that the connecting line between the two axes of rotation of the press rollers (2, 3) is capable of being pivoted through 5°-10° in both directions about one of the axes of rotation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4431202 | 1994-09-02 | ||
| DE4431202A DE4431202A1 (en) | 1994-09-02 | 1994-09-02 | Device for coating a material web on both sides |
| PCT/EP1995/002602 WO1996007791A1 (en) | 1994-09-02 | 1995-07-05 | Device for coating a material web on both sides |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0778912A1 EP0778912A1 (en) | 1997-06-18 |
| EP0778912B1 true EP0778912B1 (en) | 2000-02-09 |
Family
ID=6527203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95925833A Expired - Lifetime EP0778912B1 (en) | 1994-09-02 | 1995-07-05 | Device for coating a material web on both sides |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5803969A (en) |
| EP (1) | EP0778912B1 (en) |
| AT (1) | ATE189724T1 (en) |
| DE (2) | DE4431202A1 (en) |
| ES (1) | ES2143639T3 (en) |
| FI (1) | FI111399B (en) |
| WO (1) | WO1996007791A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI111134B (en) * | 1997-03-13 | 2003-06-13 | Metso Paper Inc | Method and apparatus for preventing vibration of rollers in a film press |
| DE10012465A1 (en) | 2000-03-15 | 2001-10-11 | Jagenberg Papiertech Gmbh | Assembly for coating the surfaces of a paper/cardboard web at the papermaking machine has a setting unit to act on the press rollers against their springs to give a low linear pressure in the press gap |
| ATE464430T1 (en) * | 2001-05-23 | 2010-04-15 | Voith Patent Gmbh | ARRANGEMENT FOR PRESSING TWO AXIS-PARALLEL ROLLERS THAT CAN BE APPROACHED TO EACH OTHER IN A DEVICE FOR PRODUCING AND/AND TREATING A MATERIAL WEB |
| DE102004039162B4 (en) * | 2004-08-11 | 2013-03-14 | Horst Sprenger Gmbh | Apparatus for coating paper and board webs |
| CA2648454C (en) * | 2008-01-02 | 2016-06-28 | Dunkirk Metal Products, Inc. | High efficiency wood or biomass boiler |
| TW201446474A (en) * | 2013-06-07 | 2014-12-16 | Hon Hai Prec Ind Co Ltd | Apparatus for manufacturing light guide plate |
| DE202014104981U1 (en) | 2014-10-20 | 2014-11-05 | Valmet Technologies, Inc. | Arrangement for retrofitting a fiber web machine with an application for a treatment medium |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1282265A (en) * | 1970-01-19 | 1972-07-19 | Gaf Corp | Production of liquid films |
| DE3540402C2 (en) * | 1984-11-07 | 1995-05-11 | Voith Gmbh J M | Device for coating running webs |
| DE3440634C2 (en) * | 1984-11-07 | 1986-09-11 | J.M. Voith Gmbh, 7920 Heidenheim | Device for double-sided coating of moving webs |
| DE3701670A1 (en) * | 1987-01-22 | 1988-08-04 | Voith Gmbh J M | Applicator mechanism for coating and moistening travelling material webs |
| DE9100291U1 (en) * | 1991-01-11 | 1991-04-04 | Jagenberg AG, 40476 Düsseldorf | Device for coating a material web on both sides |
| FI93884C (en) * | 1992-04-10 | 1995-06-12 | Valmet Paper Machinery Inc | Application beam in a glue press |
| DE4218596C2 (en) * | 1992-06-05 | 1996-05-02 | Voith Gmbh J M | Coating device for indirect application of coating color on a paper or cardboard web |
| CH690764A5 (en) * | 1993-01-19 | 2001-01-15 | Hans Brunner | Supporting structure for the manipulation of sacks for agricultural products, particularly for seed potatoes |
| FI93044C (en) * | 1993-01-22 | 1995-02-10 | Valmet Paper Machinery Inc | The size press |
| DE4312877A1 (en) * | 1993-04-20 | 1994-10-27 | Heidelberger Druckmasch Ag | Switchable coating supply on finishing units in rotary printing machines |
-
1994
- 1994-09-02 DE DE4431202A patent/DE4431202A1/en not_active Withdrawn
-
1995
- 1995-07-05 ES ES95925833T patent/ES2143639T3/en not_active Expired - Lifetime
- 1995-07-05 AT AT95925833T patent/ATE189724T1/en not_active IP Right Cessation
- 1995-07-05 EP EP95925833A patent/EP0778912B1/en not_active Expired - Lifetime
- 1995-07-05 DE DE59507794T patent/DE59507794D1/en not_active Expired - Fee Related
- 1995-07-05 WO PCT/EP1995/002602 patent/WO1996007791A1/en active IP Right Grant
- 1995-07-05 US US08/809,002 patent/US5803969A/en not_active Expired - Fee Related
-
1997
- 1997-02-28 FI FI970860A patent/FI111399B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ATE189724T1 (en) | 2000-02-15 |
| FI111399B (en) | 2003-07-15 |
| DE59507794D1 (en) | 2000-03-16 |
| ES2143639T3 (en) | 2000-05-16 |
| WO1996007791A1 (en) | 1996-03-14 |
| US5803969A (en) | 1998-09-08 |
| FI970860A (en) | 1997-02-28 |
| DE4431202A1 (en) | 1996-03-07 |
| FI970860A0 (en) | 1997-02-28 |
| EP0778912A1 (en) | 1997-06-18 |
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