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EP0571849A1 - Dispositif d'enduction pour des bandes en mouvement - Google Patents

Dispositif d'enduction pour des bandes en mouvement 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
Authority
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Withdrawn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)
English (en)
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/fr
Withdrawn legal-status Critical Current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.

Landscapes

  • Coating Apparatus (AREA)
EP93107949A 1992-05-27 1993-05-15 Dispositif d'enduction pour des bandes en mouvement Withdrawn EP0571849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924217528 DE4217528C2 (de) 1992-05-27 1992-05-27 Streicheinrichtung für laufende Warenbahnen
DE4217528 1992-05-27

Publications (1)

Publication Number Publication Date
EP0571849A1 true EP0571849A1 (fr) 1993-12-01

Family

ID=6459833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107949A Withdrawn EP0571849A1 (fr) 1992-05-27 1993-05-15 Dispositif d'enduction pour des bandes en mouvement

Country Status (2)

Country Link
EP (1) EP0571849A1 (fr)
DE (1) DE4217528C2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004858A1 (fr) * 1993-08-09 1995-02-16 Macmillan Bloedel Limited Profilage du poids de couche
US5599392A (en) * 1995-07-24 1997-02-04 Beloit Technologies, Inc. Rod holder with separate positionable contact elements for rod metering
EP0677613A3 (fr) * 1994-04-15 1997-04-16 Voith Sulzer Papiermasch Gmbh Dispositif pour déposer au moins un matériau fluide sur une bande en mouvement.
WO1997013034A3 (fr) * 1995-10-02 1997-05-09 Beloit Technologies Inc Applicateur de film a deux chambres avec trop-plein en cuve
EP0773321A3 (fr) * 1995-09-20 1997-07-02 Valmet Corp Assemblage pour éviter la formation de bandes dans un applicateur à courte durée
US5858090A (en) * 1994-12-15 1999-01-12 Voith Sulzer Papiermaschinen Gmbh Apparatus for the application of a liquid or pasty medium onto a moving material web, in particular of paper or board
WO2000025935A1 (fr) * 1998-11-04 2000-05-11 Minnesota Mining And Manufacturing Company Systeme de montage de matrices de revetement flottant
EP1733802A1 (fr) * 2005-06-15 2006-12-20 PAMA Papiermaschinen GmbH Dispositif pour appliquer une suspension liquide ou pateuse sur une bande de papier ou carton
EP1496155A3 (fr) * 2003-07-09 2007-01-03 PAMA Papiermaschinen GmbH Dispositif pour appliquer directement ou indirectement une suspension liquide ou pateuse sur une bande de papier ou carton
WO2008049592A1 (fr) 2006-10-27 2008-05-02 Khs Ag Dispositif d'encollage

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4308302A1 (en) * 1993-03-16 1993-08-05 Voith Gmbh J M Coating scraper assembly - has bed exchange action without discarding holding blades and without dismantling
DE4309002A1 (de) * 1993-03-20 1994-09-22 Voith Gmbh J M Dosiereinrichtung zur Beschichtung laufender Bahnen, vorzugsweise aus Papier oder Karton
DE19723458A1 (de) 1997-06-04 1998-12-10 Voith Sulzer Papiermasch Gmbh Vorrichtung und Verfahren zum Auftragen eines flüssigen oder pastösen Mediums auf einen sich vorbeibewegenden Untergrund

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369731A (en) * 1981-09-02 1983-01-25 Consolidated Papers, Inc. Coating apparatus having an internal leveling blade
GB2133322A (en) * 1983-01-17 1984-07-25 Cons Paper Inc Web coasting apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3417487A1 (de) * 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum auftragen einer fluessigkeit auf eine laufende bahn
DE3942590C2 (de) * 1989-06-22 1996-02-01 Voith Gmbh J M Streicheinrichtung
DE9106311U1 (de) * 1991-05-23 1991-07-25 J.M. Voith Gmbh, 7920 Heidenheim Düsenartige Streicheinrichtung zum Auftragen von Streichmasse auf eine Papierbahn

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369731A (en) * 1981-09-02 1983-01-25 Consolidated Papers, Inc. Coating apparatus having an internal leveling blade
GB2133322A (en) * 1983-01-17 1984-07-25 Cons Paper Inc Web coasting apparatus

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004858A1 (fr) * 1993-08-09 1995-02-16 Macmillan Bloedel Limited Profilage du poids de couche
EP0677613A3 (fr) * 1994-04-15 1997-04-16 Voith Sulzer Papiermasch Gmbh Dispositif pour déposer au moins un matériau fluide sur une bande en mouvement.
US5858090A (en) * 1994-12-15 1999-01-12 Voith Sulzer Papiermaschinen Gmbh Apparatus for the application of a liquid or pasty medium onto a moving material web, in particular of paper or board
US5599392A (en) * 1995-07-24 1997-02-04 Beloit Technologies, Inc. Rod holder with separate positionable contact elements for rod metering
WO1997004172A1 (fr) * 1995-07-24 1997-02-06 Beloit Technologies, Inc. Dispositif de retenue d'une tige pourvu d'elements de contact positionnables, separes, servant a mesurer la tige
EP0773321A3 (fr) * 1995-09-20 1997-07-02 Valmet Corp Assemblage pour éviter la formation de bandes dans un applicateur à courte durée
US5735957A (en) * 1995-10-02 1998-04-07 Beloit Technologies, Inc. Dual chamber film applicator with in-pond overflow
WO1997013034A3 (fr) * 1995-10-02 1997-05-09 Beloit Technologies Inc Applicateur de film a deux chambres avec trop-plein en cuve
WO2000025935A1 (fr) * 1998-11-04 2000-05-11 Minnesota Mining And Manufacturing Company Systeme de montage de matrices de revetement flottant
US6231671B1 (en) 1998-11-04 2001-05-15 3M Innovative Properties Company Floating coating die mounting system
EP1496155A3 (fr) * 2003-07-09 2007-01-03 PAMA Papiermaschinen GmbH Dispositif pour appliquer directement ou indirectement une suspension liquide ou pateuse sur une bande de papier ou carton
EP1733802A1 (fr) * 2005-06-15 2006-12-20 PAMA Papiermaschinen GmbH Dispositif pour appliquer une suspension liquide ou pateuse sur une bande de papier ou carton
WO2008049592A1 (fr) 2006-10-27 2008-05-02 Khs Ag Dispositif d'encollage
RU2423187C2 (ru) * 2006-10-27 2011-07-10 Кхс Аг Устройство для нанесения клея
US8402721B2 (en) 2006-10-27 2013-03-26 Khs Gmbh Beverage bottling or container filling plant having a beverage bottle or container labeling machine, and a beverage bottle or container labeling machine

Also Published As

Publication number Publication date
DE4217528A1 (de) 1993-12-02
DE4217528C2 (de) 1996-05-30

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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