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EP0571849A1 - Coating device for moving webs - Google Patents

Coating device for moving webs Download PDF

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Publication number
EP0571849A1
EP0571849A1 EP93107949A EP93107949A EP0571849A1 EP 0571849 A1 EP0571849 A1 EP 0571849A1 EP 93107949 A EP93107949 A EP 93107949A EP 93107949 A EP93107949 A EP 93107949A EP 0571849 A1 EP0571849 A1 EP 0571849A1
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EP
European Patent Office
Prior art keywords
roller
strip
scraper
throttle
barrier wall
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.)
Withdrawn
Application number
EP93107949A
Other languages
German (de)
French (fr)
Inventor
Rudolf Beisswanger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0571849A1 publication Critical patent/EP0571849A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • D21H23/36—Knife or blade forming part of the fluid reservoir, e.g. puddle-type trailing blade or short-dwell coaters

Definitions

  • the invention relates to a coating device according to the preamble of claim 1.
  • a coating device is known from US Pat. No. 4,848,268.
  • the web is preferably coated on both sides in a press nip formed by a pair of rollers after the coating composition has been applied beforehand the surface of the rollers has been applied.
  • So-called nozzle chamber applicators are used for the application, which form order spaces on the material web or here the roller shells which are at least slightly overpressured.
  • the coating slip is supplied to the application areas via a nozzle orifice or a nozzle orifice channel from a receiving chamber for the coating compound.
  • the pressure in the application area is generally at least 1.01 bar (about 0.01-0.5 bar gauge pressure) and can be significantly higher, especially if a coating slip, i.e. pigment coating slip, is applied. Both types of coating are therefore possible and only for the sake of brevity the term coating device is used for the purposes of this application.
  • the inlet-side gap of the application space which is formed by a barrier wall, must be adjustable, but the exact adjustment of this gap is somewhat difficult in the prior art.
  • the object of the invention is to regulate the existing excess amount of coating slip, the so-called Circulation quantity to create an exact control possibility.
  • FIG. 1 shows a cross section through the coating device according to the invention in a first embodiment
  • FIG. 2 shows a corresponding representation of a second embodiment
  • FIG. 3 shows a detail relating to FIGS. 1 and 2
  • FIGS. 4 and 5 shows a detail relating to FIG. 2 relating to the scraper bar
  • FIG. 6 a further detail relating to FIG. 2 also relating to the scraper bar
  • FIG. 7 representing a detail relating to FIGS. 1 and 6.
  • FIG. 1 there is a carrier 1 of the coating device which carries a metering device 2 which carries a doctor blade 4 held by an elastic doctor bed 5 via a leaf spring-like holder 3.
  • Roller doctor 4 is pressed against the outer surface of the roller W indicated by the dash-dotted line with the radius R via a pneumatic pressure hose 9 which is fastened to a holder 8 which is also located on the carrier 1.
  • the leaf spring 3 is clamped to the carrier 1 via a slide plate 15.
  • the running direction of the shell of the roller W is indicated by the arrow, and there is a barrier wall 10 in the direction of rotation in front of the metering element 2, which forms a throttled outlet gap on the lateral surface of the roller and limits an application space 7 formed on the metering element 2 on the inlet side.
  • This order room has one more or less high overpressure to the atmosphere between 0.01 and 0.5 bar.
  • An excess quantity Q1 flows out of the order space 7 along a guide bar 16 through the throttle gap of the barrier wall 10.
  • a further outlet 11 is provided, which consists of individual openings 12 of the barrier wall 10 and openings (openings) 13 of a throttle slide 14, which extends parallel to the roller axis.
  • a narrow, constant throttle gap of the barrier wall 10 (the smallest distance 3 of this bar from the roller - at the beginning - see also FIG. 6) - or the corresponding smallest drainage width (gap width) is preferably 1 to about 5 mm and for this purpose the support wall 19 for the barrier wall 10 and the slide 14 can be adjusted.
  • This wall is fastened to a front wall 18 of an outlet channel 6, which supplies the coating slip (coating compound in general) to the application space 7 from a receiving chamber, not shown here.
  • This receiving chamber receives the coating compound from a pump via a line system, which is also not shown in detail here.
  • the amount Q1 is relatively small and is at most 30%, preferably at most 20% of the total amount and can be guided towards zero by the leaf spring 40 indicated by dash-dotted lines.
  • a locking bar 21 which also forms a relatively narrow gap on the roller in order to largely keep the air entrained by the outer surface away from the application device.
  • This locking bar is held on the wall 19 via a bracket 24 and support rods 22.
  • a scraper strip 35 - preferably made of rubber or rubber-elastic plastic - is provided on the roller jacket on the inlet side in front of the coating device 50, which edge causes the roller surface to be cleaned with an edge 38.
  • this scraper bar also keeps the air away from the coating device.
  • the scraper strip 35 is pressed against the roller jacket by a leaf spring 33, provided that the pressure hose 34 counteracting the leaf spring is depressurized.
  • the scraper bar 35 is pressed less and less - so that a controllable contact pressure can be obtained - and finally removed from the roll surface at a correspondingly high pressure. This is necessary when starting up the coating device if there is still no lubrication from the coating slip.
  • a holder 24 ' is provided for the scraper strip 35, and the pressure hose 34 is held in a strip 31 thereof. As in FIG. 1, the holder 24 'is also fastened to a corresponding wall of the coating device via holding rods 22'.
  • the components identified by the reference numerals provided with a comma correspond to similar components in other figures.
  • the Scraper bar 35 is preferably made of rubber or plastic, such as Teflon.
  • FIG. 3 shows a detailed illustration of a throttle strip 25, which is designed as a rotary slide valve and for this purpose has recesses 27 which, by means of openings 26 in the barrier wall 10, form drainage channels for excess coating slip. Because of the shape of the openings 26, the barrier wall 10 'is formed in two parts here.
  • FIG. 4 shows a detailed illustration of a scraper strip 35 'corresponding to FIG. 2, which has a scraper head 41 held by a thin rib 42 in the manner of a wiper. A compact part 40 then adjoins the rib 42.
  • the scraper strip 35 or 35 cleans the outer surface of the roller from adhering paint particles, fibers etc. and of course also scrapes off the air entrained by the outer surface.
  • FIG. 5 also shows a scraper bar 35 ′′ which is used for cleaning the roll shell.
  • a scraper bar 35 ′′ which is used for cleaning the roll shell.
  • an integrated component with an integrated pressure hose 46 is provided here, which is carried by the holding strip 24 ′′.
  • FIG. 6 shows a variant of FIG. 1, in which the drain channel 11 'is relatively long and at the end of which the throttle strip 14 'is arranged.
  • a channel support 29 fastened to an adjustable locking wall 27 is provided here, which has the openings 30 assigned to the openings of the locking bar 14 'and in this respect defining the free passage cross section.
  • the channel 11 ' is covered by a cover plate 28.
  • the advantage here is that the color flow going to the metering bar is not significantly influenced by the branched overflow stream going out through the channel 11 '- in particular viewed over the length of the metering bar 4 - and is not influenced irregularly.
  • the length of the channel 11 'to the throttle strip 14' is at least 80 mm.
  • the setting of the narrowest gap - on the wall 28 - can e.g. analogously as in the case of FIG. 1 by the height-adjustable support wall 27.
  • An adjustable bar 41 or such bars of different heights (widths) can also be provided.
  • FIG. 7 shows in view A the covering of the openings 30 by the corresponding window openings of the throttle slide 14 ', which in principle also applies to FIG. 1.

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  • Coating Apparatus (AREA)

Abstract

The invention relates to a device for coating moving material webs, especially of paper or cardboard, in which an applicator chamber, at least under slight overpressure, for coating mass is arranged on the bare surface of at least one roller of a pair of rollers forming a nip between them for coating the material web, the applicator space (7) being limited on the run-in side, in respect of the outer surface of this roller, by a stop wall (10) forming a throttled run-off gap and on the run-off side by a metering strip (4). The invention is characterised by a further run-off (11) consisting of a throttle strip (14, 14') forming the applicator chamber (7), the run-off (11, 11') being provided in the region of or at least partially in the stop wall (10, 27). <IMAGE>

Description

Die Erfindung betrifft eine Streicheinrichtung entsprechend dem Oberbegriff des Patentanspruchs 1. Eine solche Streicheinrichtung ist bekannt aus der US-PS 48 48 268. Bei dieser Einrichtung wird vorzugsweise die Bahn auf beiden Seiten in einem von einem Walzenpaar gebildeten Preßspalt beschichtet, nachdem die Beschichtungsmasse vorher auf die Mantelflächen der Walzen aufgetragen worden ist. Es werden zum Auftragen sogenannte Düsenkammerauftragswerke verwendet, die an der Warenbahn bzw. hier den Walzenmänteln unter zumindest leichtem Überdruck stehender Auftragsräume bilden. Dabei wird die Streichmasse den Auftragsräumen über eine Düsenmündung oder einen Düsenmündungskanal von einer Aufnahmekammer für die Beschichtungsmasse her zugeführt. Dabei beträgt der Druck im Auftragsraum im allgemeinen mindestens 1,01 bar (etwa 0,01-0,5 bar Überdruck) und kann wesentlich höher sein, vor allem, wenn Streichmasse, also Pigmentstreichfarbe aufgetragen wird. Es sind also beide Beschichtungsarten möglich und nur der Kürze halber wird für die Zwecke dieser Anmeldung der Begriff Streicheinrichtung gebraucht. Der von einer Sperrwand gebildete, einlaufseitige Spalt des Auftragsraumes muß einstellbar ausgebildet sein, aber die genaue Einregulierung dieses Spalts ist beim Stand der Technik etwas schwierig.The invention relates to a coating device according to the preamble of claim 1. Such a coating device is known from US Pat. No. 4,848,268. In this device, the web is preferably coated on both sides in a press nip formed by a pair of rollers after the coating composition has been applied beforehand the surface of the rollers has been applied. So-called nozzle chamber applicators are used for the application, which form order spaces on the material web or here the roller shells which are at least slightly overpressured. The coating slip is supplied to the application areas via a nozzle orifice or a nozzle orifice channel from a receiving chamber for the coating compound. The pressure in the application area is generally at least 1.01 bar (about 0.01-0.5 bar gauge pressure) and can be significantly higher, especially if a coating slip, i.e. pigment coating slip, is applied. Both types of coating are therefore possible and only for the sake of brevity the term coating device is used for the purposes of this application. The inlet-side gap of the application space, which is formed by a barrier wall, must be adjustable, but the exact adjustment of this gap is somewhat difficult in the prior art.

Die Aufgabe der Erfindung ist es, für die Regulierung der vorhandenen Überschußmenge an Streichmasse, die sogenannte Umlaufmenge, eine genaue Regelmöglichkeit zu schaffen.The object of the invention is to regulate the existing excess amount of coating slip, the so-called Circulation quantity to create an exact control possibility.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.This object is achieved by the features of the characterizing part of patent claim 1.

Nachfolgend wird die Erfindung anhand der in den Figuren der Zeichnung dargestellten Ausführungsbeispiele erläutert. Dabei stellt Figur 1 prinzipmäßig einen Querschnitt durch die erfindungsgemäße Streicheinrichtung in einer ersten Ausführungsform, Figur 2 eine entsprechende Darstellung einer zweiten Ausführungsform, Figur 3 eine Einzelheit zu Figur 1 und 2, Figur 4 und 5 eine Einzelheit zu Figur 2 betreffend die Schaberleiste, Figur 6 eine weitere Einzelheit zu Figur 2 ebenfalls die Schaberleiste betreffend und Figur 7 eine Einzelheit zu Figur 1 und 6 dar.The invention is explained below on the basis of the exemplary embodiments illustrated in the figures of the drawing. In principle, FIG. 1 shows a cross section through the coating device according to the invention in a first embodiment, FIG. 2 shows a corresponding representation of a second embodiment, FIG. 3 shows a detail relating to FIGS. 1 and 2, FIGS. 4 and 5 shows a detail relating to FIG. 2 relating to the scraper bar, FIG. 6 a further detail relating to FIG. 2 also relating to the scraper bar and FIG. 7 representing a detail relating to FIGS. 1 and 6.

In Figur 1 ist ein Träger 1 der Streicheinrichtung vorhanden, der eine Dosiereinrichtung 2 trägt, die einen von einem elastischen Rakelbett 5 gehaltene Rollrakel 4 über eine blattfederartige Halterung 3 trägt. Rollrakel 4 wird dabei an die Mantelfläche der durch die strichpunktierte Linie mit dem Radius R angedeuteten Walze W über einen pneumatischen Druckschlauch 9 angepreßt, der an einer Halterung 8 befestigt ist, die sich auch auf dem Träger 1 befindet. Über eine Schieberplatte 15 wird dabei die Blattfeder 3 an dem Träger 1 festgespannt. Die Laufrichtung des Mantels der Walze W ist durch den Pfeil gekennzeichnet, und es befindet sich in Laufrichtung vor dem Dosierelement 2 eine Sperrwand 10, die einen gedrosselten Ablaufspalt an der Mantelfläche der Walze bildet und einen an dem Dosierelement 2 gebildeten Auftragsraum 7 einlaufseitig begrenzt. Dieser Auftragsraum hat einen mehr oder weniger hohem Überdruck gegenüber der Atmosphäre zwischen 0,01 und 0,5 bar. Durch den Drosselspalt der Sperrwand 10 strömt eine Überschußmenge Q1 entlang einer Führungsleiste 16 aus dem Auftragsraum 7 ab.In FIG. 1 there is a carrier 1 of the coating device which carries a metering device 2 which carries a doctor blade 4 held by an elastic doctor bed 5 via a leaf spring-like holder 3. Roller doctor 4 is pressed against the outer surface of the roller W indicated by the dash-dotted line with the radius R via a pneumatic pressure hose 9 which is fastened to a holder 8 which is also located on the carrier 1. The leaf spring 3 is clamped to the carrier 1 via a slide plate 15. The running direction of the shell of the roller W is indicated by the arrow, and there is a barrier wall 10 in the direction of rotation in front of the metering element 2, which forms a throttled outlet gap on the lateral surface of the roller and limits an application space 7 formed on the metering element 2 on the inlet side. This order room has one more or less high overpressure to the atmosphere between 0.01 and 0.5 bar. An excess quantity Q1 flows out of the order space 7 along a guide bar 16 through the throttle gap of the barrier wall 10.

Es ist ein weiterer Ablauf 11 vorgesehen, der aus einzelnen Öffnungen 12 der Sperrwand 10 sowie Öffnungen (Durchbrüche) 13 eines Drosselschiebers 14 besteht, der sich parallel zur Walzenachse erstreckt. Durch Verschiebung des Schiebers 14 kann die Überdeckung der Öffnungen 12 und 13 und damit der freie Durchgangsquerschnitt für den Ablauf 11 verändert werden, so daß die ablaufende Menge Q2 und damit die gesamte Ablauf- bzw. Überlaufmenge leicht eingestellt werden kann. An der Walze W kann ein enger, konstanter Drosselspalt der Sperrwand 10 (der kleinste Abstand 3 dieser Leiste zur Walze - an ihrem Beginn also - siehe auch Figur 6) - bzw. die entsprechende kleinste Ablaufweite (Spaltweite) beträgt vorzugsweise 1 bis etwa 5 mm und man kann zu dem Zweck die Tragwand 19 für die Sperrwand 10 und den Schieber 14 verstellen. Diese Wand ist an einer Vorderwand 18 eines Mündungskanals 6 befestigt, der die Streichmasse (Beschichtungsmasse allgemein) dem Auftragsraum 7 von einer hier nicht dargestellten Aufnahmekammer zuführt. Diese Aufnahmekammer erhält die Beschichtungsmasse über ein Leitungssystem von einer Pumpe her, was hier im einzelnen auch nicht dargestellt ist.A further outlet 11 is provided, which consists of individual openings 12 of the barrier wall 10 and openings (openings) 13 of a throttle slide 14, which extends parallel to the roller axis. By moving the slide 14, the overlap of the openings 12 and 13 and thus the free passage cross-section for the outlet 11 can be changed, so that the amount Q2 and thus the total amount of discharge or overflow can be easily adjusted. At the roller W, a narrow, constant throttle gap of the barrier wall 10 (the smallest distance 3 of this bar from the roller - at the beginning - see also FIG. 6) - or the corresponding smallest drainage width (gap width) is preferably 1 to about 5 mm and for this purpose the support wall 19 for the barrier wall 10 and the slide 14 can be adjusted. This wall is fastened to a front wall 18 of an outlet channel 6, which supplies the coating slip (coating compound in general) to the application space 7 from a receiving chamber, not shown here. This receiving chamber receives the coating compound from a pump via a line system, which is also not shown in detail here.

Die Menge Q1 ist relativ klein und beträgt höchstens 30 %, vorzugsweise höchstens 20 % der Gesamtmenge und kann durch die strichpunktiert angedeutete Blattfeder 40 gegen Null geführt werden.The amount Q1 is relatively small and is at most 30%, preferably at most 20% of the total amount and can be guided towards zero by the leaf spring 40 indicated by dash-dotted lines.

In Laufrichtung vor der Sperrwand 10 befindet sich hier eine Sperrleiste 21, die auch einen relativ engen Spalt an der Walze bildet, um die von der Mantelfläche mitgerissene Luft weitgehend von der Auftragseinrichtung fernzuhalten. Diese Sperrleiste ist über eine Halterung 24 und Tragstäbe 22 an der Wand 19 gehalten.In the running direction in front of the barrier wall 10 there is a locking bar 21 which also forms a relatively narrow gap on the roller in order to largely keep the air entrained by the outer surface away from the application device. This locking bar is held on the wall 19 via a bracket 24 and support rods 22.

In Figur 2 ist der überwiegende Teil der Beschichtungseinrichtung 50 der Figur 1, der hier an sich auch vorgesehen ist, im einzelnen nicht weiter dargestellt. In Abwandlung zu Figur 1 ist hier einlaufseitig vor der Beschichtungseinrichtung 50 eine Schaberleiste 35 - vorzugsweise aus Gummi oder gummielastischem Kunststoff - an dem Walzenmantel vorgesehen, die mit einer Kante 38 eine Reinigung der Walzenoberfläche bewirkt. Natürlich wird durch diese Schaberleiste auch die Luft von der Beschichtungseinrichtung ferngehalten. Die Schaberleiste 35 wird von einer Blattfeder 33 gegen den Walzenmantel gedrückt, sofern der der Blattfeder entgegenwirkende Druckschlauch 34 drucklos ist. Wird dieser unter Druck gesetzt, wird die Schaberleiste 35 immer weniger angepreßt - so daß man einen regelbaren Anpreßdruck erhalten kann - und schließlich bei entsprechend hohem Druck von der Walzenoberfläche entfernt. Dies ist beim Anfahren der Beschichtungseinrichtung notwendig, wenn noch keine Schmierung durch Streichmasse vorliegt. Dabei ist für die Schaberleiste 35 eine Halterung 24' vorgesehen, und der Druckschlauch 34 ist in einer Leiste 31 derselben gehalten. Die Halterung 24' ist analog wie in Figur 1 auch über Haltestäbe 22' an einer entsprechenden Wand der Beschichtungseinrichtung befestigt. Die durch mit Beistrich versehenen Bezugszahlen gekennzeichneten Bauteile entsprechen ähnlichen Bauteilen in anderen Figuren. Die Schaberleiste 35 besteht vorzugsweise aus Gummi oder Kunststoff, z.B. Teflon.The majority of the coating device 50 of FIG. 1, which is also provided here per se, is not shown in detail in FIG. 2. In a modification of FIG. 1, a scraper strip 35 - preferably made of rubber or rubber-elastic plastic - is provided on the roller jacket on the inlet side in front of the coating device 50, which edge causes the roller surface to be cleaned with an edge 38. Of course, this scraper bar also keeps the air away from the coating device. The scraper strip 35 is pressed against the roller jacket by a leaf spring 33, provided that the pressure hose 34 counteracting the leaf spring is depressurized. If this is pressurized, the scraper bar 35 is pressed less and less - so that a controllable contact pressure can be obtained - and finally removed from the roll surface at a correspondingly high pressure. This is necessary when starting up the coating device if there is still no lubrication from the coating slip. A holder 24 'is provided for the scraper strip 35, and the pressure hose 34 is held in a strip 31 thereof. As in FIG. 1, the holder 24 'is also fastened to a corresponding wall of the coating device via holding rods 22'. The components identified by the reference numerals provided with a comma correspond to similar components in other figures. The Scraper bar 35 is preferably made of rubber or plastic, such as Teflon.

In Figur 3 ist eine Detaildarstellung einer Drosselleiste 25 dargestellt, welche als Drehschieber ausgebildet ist und zu dem Zweck Ausnehmungen 27 aufweist, welche mittels Öffnungen 26 in der Sperrwand 10 Ablaufkanäle für überschüssige Streichmasse bilden. Wegen der Form der Durchbrüche 26 ist hier die Sperrwand 10' zweiteilig ausgebildet.FIG. 3 shows a detailed illustration of a throttle strip 25, which is designed as a rotary slide valve and for this purpose has recesses 27 which, by means of openings 26 in the barrier wall 10, form drainage channels for excess coating slip. Because of the shape of the openings 26, the barrier wall 10 'is formed in two parts here.

In Figur 4 ist eine Detaildarstellung einer Schaberleiste 35' entsprechend Figur 2 dargestellt, die scheibenwischerartig einen von einer dünnen Rippe 42 gehaltenen Schaberkopf 41 aufweist. An die Rippe 42 schließt sich dann ein kompakter Teil 40 an.FIG. 4 shows a detailed illustration of a scraper strip 35 'corresponding to FIG. 2, which has a scraper head 41 held by a thin rib 42 in the manner of a wiper. A compact part 40 then adjoins the rib 42.

Die Schaberleiste 35 bzw. 35' reinigt die Mantelfläche der Walze von anhaftenden Farbteilchen, Fasern usw. und schabt natürlich auch die von der Mantelfläche mitgerissene Luft ab.The scraper strip 35 or 35 'cleans the outer surface of the roller from adhering paint particles, fibers etc. and of course also scrapes off the air entrained by the outer surface.

In Figur 5 ist ebenfalls eine zu Reinigungszwecken des Walzenmantels dienende Schaberleiste 35'' dargestellt. Um den von einem Steg 44 getragenen Schaberkopf 45 an die Mantelfläche der Walze anstellen zu können, ist hier ein integriertes Bauteil mit einem integrierten Druckschlauch 46 vorgesehen, der von der Halteleiste 24'' getragen ist. Wenn der Druck aus dem Druckschlauch 46 entfernt wird, bewegt sich der Schaberkopf 45 von dem Walzenmantel weg.FIG. 5 also shows a scraper bar 35 ″ which is used for cleaning the roll shell. In order to be able to position the scraper head 45 carried by a web 44 against the lateral surface of the roller, an integrated component with an integrated pressure hose 46 is provided here, which is carried by the holding strip 24 ″. When the pressure is removed from the pressure hose 46, the scraper head 45 moves away from the roll shell.

In Figur 6 ist eine Variante zu Figur 1 dargestellt, bei welcher der Ablaufkanal 11' relativ lang ausgebildet ist und an dessen Ende hier die Drosselleiste 14' angeordnet ist. Es ist hier ein an einer verstellbaren Sperrwand 27 befestigter Kanalträger 29 vorgesehen, der die den Öffnungen der Sperrleiste 14' zugeordneten, insoweit den freien Durchgangsquerschnitt festlegende Öffnungen 30 aufweist. In der Nahe des Walzenmantels ist der Kanal 11' durch eine Deckplatte 28 abgedeckt. Man hat hier den Vorteil, daß der zur Dosierleiste gehende Farbstrom durch den abgezweigten, durch den Kanal 11' abgehenden Überlaufstrom - insbesondere betrachtet über die Länge der Dosierleiste 4 - nicht wesentlich, und nicht unregelmäßig beeinflußt wird. Die Länge des Kanals 11' bis zur Drosselleiste 14' beträgt mindestens 80 mm.FIG. 6 shows a variant of FIG. 1, in which the drain channel 11 'is relatively long and at the end of which the throttle strip 14 'is arranged. A channel support 29 fastened to an adjustable locking wall 27 is provided here, which has the openings 30 assigned to the openings of the locking bar 14 'and in this respect defining the free passage cross section. In the vicinity of the roll shell, the channel 11 'is covered by a cover plate 28. The advantage here is that the color flow going to the metering bar is not significantly influenced by the branched overflow stream going out through the channel 11 '- in particular viewed over the length of the metering bar 4 - and is not influenced irregularly. The length of the channel 11 'to the throttle strip 14' is at least 80 mm.

Auf die Wand 28 kann auch das gummiartige Sperrelement 44 der Fig. 5, z.B. mittels einer entsprechenden Halterung für dessen Schlauchteil aufgesetzt werden (s. Fig. 8)The rubber-like locking element 44 of FIG. 5, e.g. by means of an appropriate holder for its hose part (see FIG. 8)

Die Einstellung des engsten Spalts - an der Wand 28 - kann z.b. analog wie im Fall der Figur 1 durch die höhenverstellbare Tragwand 27 bewirkt werden. Es kann auch eine verstellbare Leiste 41 oder solche Leisten verschiedener Höhe (Breite) vorgesehen werden.The setting of the narrowest gap - on the wall 28 - can e.g. analogously as in the case of FIG. 1 by the height-adjustable support wall 27. An adjustable bar 41 or such bars of different heights (widths) can also be provided.

Figur 7 zeigt in Ansicht A die Überdeckung der Öffnungen 30 durch die entsprechenden Fensteröffnungen des Drosselschiebers 14', was prinzipiell auch für Figur 1 gilt.FIG. 7 shows in view A the covering of the openings 30 by the corresponding window openings of the throttle slide 14 ', which in principle also applies to FIG. 1.

Claims (10)

Einrichtung zur Beschichtung laufender Warenbahnen, insbesondere aus Papier oder Karton, bei der eine mindestens unter leichtem Überdruck stehende Auftragskammer für Streichmasse insbesondere an der Mantelfläche mindestens einer Walze eines zur Beschichtung der Warenbahn einen Preßspalt zwischen sich bildenden Walzenpaares angeordnet ist, wobei der Auftragsraum (7) bahneinlaufseitig in Bezug auf die Mantelfläche dieser Walze durch eine einen vorzugsweise einstellbaren, gedrosselten Ablaufspalt bildende Sperrwand (10, 10' , 27) ) und bahnablaufseitig durch ein Rakelelement (4) begrenzt ist, gekennzeichnet durch eine einen weiteren Ablauf (11, 11') aus der Auftragskammer (7, 7') bildende Drosselleiste (14, 14', 25), wobei der weitere Ablauf (11, 11') im Bereich oder zumindest teilweise in der Sperrwand (10, 10', 27) vorgesehen ist.Device for coating running material webs, in particular made of paper or cardboard, in which an application chamber for coating slip, which is at least slightly overpressured, is arranged in particular on the lateral surface of at least one roller of a press nip between the pair of rollers forming the material web, the application space (7) on the web inlet side with respect to the lateral surface of this roller by a barrier wall (10, 10 ', 27) forming a preferably adjustable, throttled outlet gap and on the web outlet side by a doctor element (4), characterized by a further outlet (11, 11') throttle strip (14, 14 ', 25) forming from the application chamber (7, 7'), the further outlet (11, 11 ') being provided in the area or at least partially in the barrier wall (10, 10', 27). Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Drosselleiste (14') in einem Bereich des Ablaufs (11') angeordnet ist, der von dem Auftragsraum (7') entsprechend einem Strömungsweg im Ablaufkanal (11') von vorzugsweise mindestens 80 mm entfernt ist, um Störeinflüsse von der Auftragskammer (7, 7') fernzuhalten.Device according to Claim 1, characterized in that the throttle strip (14 ') is arranged in a region of the outlet (11') which is preferably at least 80 mm away from the application space (7 ') in accordance with a flow path in the outlet channel (11') is to keep interference from the application chamber (7, 7 '). Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine einen Luftspalt zur Walze bildende Sperrleiste (21) in Drehrichtung der Walze vor dem Drosselspalt der Sperrwand (10) angeordnet ist.Device according to claim 1 or 2, characterized in that one forming an air gap to the roller Locking bar (21) is arranged in the direction of rotation of the roller in front of the throttle gap of the locking wall (10). Einrichtung nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß die Drosselleiste (14) ein mit Durchbrüchen (13) versehener Schieber ist, der mit entsprechenden Durchbrüchen (12) der Sperrwand (10) zusammenarbeitet und parallel zur Achse der Walze angeordnet ist.Device according to one of claims 1-3, characterized in that the throttle strip (14) is a slide provided with openings (13) which cooperates with corresponding openings (12) in the barrier wall (10) and is arranged parallel to the axis of the roller. Einrichtung nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß die Drosselleiste mindestens ein Drehschieber (25) ist, der mit entsprechenden Durchbrüchen (26) der Sperrwand zusammenarbeitet.Device according to one of claims 1-3, characterized in that the throttle strip is at least one rotary slide valve (25) which cooperates with corresponding openings (26) in the barrier wall. Einrichtung nach einem der Ansprüche 1-5, dadurch gekennzeichnet, daß die Drosselleiste (14, 14', 25) wahrend des Betriebes einstellbar ist.Device according to one of claims 1-5, characterized in that the throttle strip (14, 14 ', 25) is adjustable during operation. Einrichtung nach einem der Ansprüche 1-6, dadurch gekennzeichnet, daß in Drehrichtung vor der Sperrwand (10) eine Schaberleiste (35) an der Mantelfläche der Walze vorgesehen ist.Device according to one of claims 1-6, characterized in that a scraper bar (35) is provided on the outer surface of the roller in the direction of rotation in front of the barrier wall (10). Einrichtung nach Anspruch 7, dadurch gekennzeichnet, daß eine Blattfeder (33) als Halter für die Schaberleiste (35) zum Anpressen derselben an die Mantelfläche der Walze sowie ein Druckschlauch (34) zum Aufbringen einer Gegenkraft gegen die Blattfeder (33) vorgesehen sind.Device according to claim 7, characterized in that a leaf spring (33) is provided as a holder for the scraper bar (35) for pressing it against the lateral surface of the roller and a pressure hose (34) for applying a counterforce against the leaf spring (33). Einrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Schaberleiste (35) einen scheibenwischerartig von einer dünnen Rippe (42) getragenen Schaberkopf (41) aufweist.Device according to claim 8, characterized in that the scraper strip (35) has a wiper-like shape has a scraper head (41) carried by a thin rib (42). Einrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die Schaberleiste (35') oder zumindest der Schaberkopf (41) aus Polyvinylchlorid, Polyamid, oder Polyaminamid besteht.Device according to claim 9, characterized in that the scraper strip (35 ') or at least the scraper head (41) consists of polyvinyl chloride, polyamide or polyaminamide.
EP93107949A 1992-05-27 1993-05-15 Coating device for moving webs Withdrawn EP0571849A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4217528 1992-05-27
DE19924217528 DE4217528C2 (en) 1992-05-27 1992-05-27 Coating device for running webs

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EP0571849A1 true EP0571849A1 (en) 1993-12-01

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WO1995004858A1 (en) * 1993-08-09 1995-02-16 Macmillan Bloedel Limited Coat weight profiling
US5599392A (en) * 1995-07-24 1997-02-04 Beloit Technologies, Inc. Rod holder with separate positionable contact elements for rod metering
EP0677613A3 (en) * 1994-04-15 1997-04-16 Voith Sulzer Papiermasch Gmbh Device for applying at least one liquid medium to a running web of material.
WO1997013034A3 (en) * 1995-10-02 1997-05-09 Beloit Technologies Inc Dual chamber film applicator with in-pond overflow
EP0773321A3 (en) * 1995-09-20 1997-07-02 Valmet Corp Assembly for preventing striping in a short dwell time applicator
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WO1995004858A1 (en) * 1993-08-09 1995-02-16 Macmillan Bloedel Limited Coat weight profiling
EP0677613A3 (en) * 1994-04-15 1997-04-16 Voith Sulzer Papiermasch Gmbh Device for applying at least one liquid medium to a running web of material.
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US5599392A (en) * 1995-07-24 1997-02-04 Beloit Technologies, Inc. Rod holder with separate positionable contact elements for rod metering
WO1997004172A1 (en) * 1995-07-24 1997-02-06 Beloit Technologies, Inc. Rod holder with separate positionable contact elements for rod metering
EP0773321A3 (en) * 1995-09-20 1997-07-02 Valmet Corp Assembly for preventing striping in a short dwell time applicator
US5735957A (en) * 1995-10-02 1998-04-07 Beloit Technologies, Inc. Dual chamber film applicator with in-pond overflow
WO1997013034A3 (en) * 1995-10-02 1997-05-09 Beloit Technologies Inc Dual chamber film applicator with in-pond overflow
WO2000025935A1 (en) * 1998-11-04 2000-05-11 Minnesota Mining And Manufacturing Company Floating coating die mounting system
US6231671B1 (en) 1998-11-04 2001-05-15 3M Innovative Properties Company Floating coating die mounting system
EP1496155A3 (en) * 2003-07-09 2007-01-03 PAMA Papiermaschinen GmbH Device for applying directly or indirectly a liquid or pasty suspension onto paper or board webs
EP1733802A1 (en) * 2005-06-15 2006-12-20 PAMA Papiermaschinen GmbH Device for applying a liquid or pasty suspension on paper or board webs
WO2008049592A1 (en) 2006-10-27 2008-05-02 Khs Ag Glue application device
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Also Published As

Publication number Publication date
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DE4217528A1 (en) 1993-12-02

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