EP0643168A1 - Dispositif de l'enduction d'une bande de papier - Google Patents

Dispositif de l'enduction d'une bande de papier Download PDF

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Publication number
EP0643168A1
EP0643168A1 EP94111844A EP94111844A EP0643168A1 EP 0643168 A1 EP0643168 A1 EP 0643168A1 EP 94111844 A EP94111844 A EP 94111844A EP 94111844 A EP94111844 A EP 94111844A EP 0643168 A1 EP0643168 A1 EP 0643168A1
Authority
EP
European Patent Office
Prior art keywords
air
paper web
nip
rollers
web
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.)
Granted
Application number
EP94111844A
Other languages
German (de)
English (en)
Other versions
EP0643168B1 (fr
Inventor
Rudolf Beisswanger
Martin Dr. Kustermann
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.)
Voith Patent 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27205968&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0643168(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from EP93112695A external-priority patent/EP0643167A1/fr
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to EP19940111844 priority Critical patent/EP0643168B1/fr
Publication of EP0643168A1 publication Critical patent/EP0643168A1/fr
Application granted granted Critical
Publication of EP0643168B1 publication Critical patent/EP0643168B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/001—Drying webs by radiant heating
    • D21F5/002—Drying webs by radiant heating from infrared-emitting elements
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/185—Supporting webs in hot air dryers
    • D21F5/187—Supporting webs in hot air dryers by air jets

Definitions

  • the invention relates to a device for coating a paper web. Reference is made to the preamble of claim 1.
  • both sides of the paper web need not be deleted.
  • the invention has for its object to design a coating device according to the preamble of claim 1 such that the orange peel effect is reduced in an even better manner or completely eliminated without any significant additional effort.
  • one parameter is the trigger angle, i.e. the angle at which the paper web leaves the nip after the coating has been applied
  • the other parameter is the web tension which prevails in the paper web after the nip. Both must be precisely adjustable.
  • the second parameter poses particular difficulties, since the coated paper web, which is still moist, cannot be passed through a pair of draw rollers, i.e. a pair of driven rollers that clamp the web between them and thus transmit a certain tensile force to the web.
  • the inventor's further finding consists in the fact that a drying section, which has very specific features, must be connected directly to the air-air beams. These features include, above all, precisely measured parameters with regard to the air outlet speed from the air-jet beams and in the air-float dryers, furthermore a certain arrangement of the infrared dryers in relation to the air-float dryers and finally a certain length fraction of the two types of dryer, seen in the direction of travel of the web.
  • connection of the infrared path is particularly favorable because the infrared rays penetrate deeply into the paper web, have a high energy density and heat up the water contained in the paper web, so that the evaporation can be carried out relatively easily in the downstream floating drying path.
  • first infrared dryer of the drying devices following the roller gap.
  • this first infrared dryer is arranged directly behind the (at least) one air beam.
  • a special infrared dryer is provided which can itself generate an air cushion between itself and the coated paper web.
  • Figure 1 shows a coating system with two coating stations and with drying devices located between them.
  • Figures 2 to 5 show coating stations, the guiding organs are connected in different embodiments and in different arrangements.
  • a coating unit 1.1 is assigned to one of these two rollers.
  • the coating station is followed by a traction device, comprising two air girders 2 and 3. This is followed by an infrared drying section 4, a short dryer section 5 with three drying cylinders 5.1, 5.2 and 5.3, a suction guide roller 5.4 and a series of guide rollers.
  • a second coating station 6 in turn has two rollers.
  • An application unit 6.1 is assigned to one roller.
  • An infrared drying section 7 and an end drying group 8 then follow.
  • the system shown in Figure 2 comprises a two-row cylinder dryer section 1, from which one can still see the end, a smoothing unit 3, a first coating station 5, one of these downstream dryer 6, a dryer section 7 with drying cylinders, a second coating station 8, a further dryer 9, a dryer section 9.1 with drying cylinders and a reeling station 10.
  • the two coating stations 5 and 8 each have two nozzle applicators 5.1, 5.2 or 8.1 and 8.2. This means that the paper web can be coated on both sides in each coating station.
  • the dryers 6 and 9 are floating dryers, which carry the web freely and bring them to such a dry content (at least 70% dry) that the line in the subsequent cylinder dry groups 7 and 9.1 is touchable.
  • FIGS. 3-6 each show schematically application stations, downstream control elements and drying facilities downstream of these.
  • the application station according to FIG. 3 comprises two rollers 10, 20.
  • One of these two application rollers, namely the roller 10, is assigned a nozzle application unit 10.1.
  • the other roller 20 is free of such an application.
  • the paper web 11 is passed in the direction of the arrow through a nip which is formed from the lateral surfaces of the two rollers 10 and 20.
  • a guide element in the form of an air bar 12 follows the roll nip.
  • the air bar is only shown schematically. It consists of a hollow profile bar which has a plurality of bores 12.1 on its side facing the paper web 11. The bores 1 extend over the entire length of the air bar 12, and thus over the entire width of the paper web 11.
  • An infrared drying section 13 is connected to the supporting air bar 12, followed by a floating drying section 14. This also has supporting air bars 14.1, 14.2, 14.3, which are only indicated in outline.
  • the paper web 11 is guided as follows: after the apex of the two rollers, the paper web 11 first wraps around the roller 10 by a specific wrap angle x. It then wraps around the air bar 12, which in turn undergoes a slight deflection. Further redirections take place within the floating dry section as it passes through the supporting air beams 14.1, 14.2, 14.3.
  • the floating drying section 14 is followed by a further infrared drying section 15.
  • the first drying after the air bar 12 is an infrared drying.
  • the infrared drying section 13 immediately follows the application station with the rollers 10, 20, see one from the air beam 12. It is also important that the entire drying device comprises more than just two drying sections, but at least three drying sections, and that the infrared drying sections on the one hand and the floating drying sections on the other alternate.
  • FIG. 4 again shows a coating device with two application rollers 10 and 20.
  • a nozzle application unit 10.1 or 10.2 is assigned to both application rollers.
  • the paper web 11 thus receives a line on both sides.
  • the nozzle 10.1 can also be omitted, so that only a single side of the paper web 11 receives a line.
  • Two air carrier bars 22 and 23 follow the application gap. These are arranged on opposite sides. This is followed by an infrared section 24, a floating drying section 25 and again an infrared section 26. In this case, the three drying sections mentioned - in the direction of travel of the paper web 11 - have the same length.
  • the paper web 11 leaves the nip, whereby it wraps around the roller 10 only very slightly.
  • the wrap angle x is thus so small that it cannot be seen in the illustration.
  • the wrapping of the supporting air beams 22 and 23 is only a very slight one, so that they are also not recognized.
  • only one of the two application rollers namely the roller 10, is assigned an application unit 10.1. It is followed by a bank of three supporting air beams 30, 31, 32, followed by an infrared section 34, a floating drying section 35, a further infrared section 36 and a further floating drying section 37. It can be seen that the two floating drying sections - in the running direction of the Paper web 11 seen - each have the same length, but that the floating drying section 37 is longer than the floating drying section 35.
  • the paper web 11 is again coated on both sides.
  • the roll nip is first followed by a supporting air bar 40 arranged on one side of the web, followed by a bench of supporting air bars 41 and 42 arranged on the other side of the paper web 11.
  • An infrared path 42 and a floating drying path 43 follow.
  • roller 10 see in particular the very small distance E in FIG. 6 - ensures a clearly defined separation point of the web 11 from the roller 10. The separation point thus does not oscillate back and forth. If coating color is applied to only one side, and if roller 10 is used as an application roller with a relatively small wrap x (see FIG. 3), roller 10 can have a softer surface than back-up roller 20. This is quite unusual, because this usually follows Web of the harder roller, so that the harder roller is wrapped.
  • FIG. 7 shows an inventive device of special construction.
  • the two rollers 10, 20 are arranged such that the paper web 11 runs through the nip at an angle of approximately 20 ° to the vertical.
  • This is followed by the supporting air bars 50.
  • the drying device the elements of which are not identified in detail, but are easily recognizable are.
  • the paper web thus takes a V-shaped course.
  • the two legs of this V can run at different angles, each at an angle of between 10 and 60 ° to the horizontal.
  • the special feature of the arrangement according to FIG. 8 is that two types of drying sections - namely an infrared section on the one hand and a floating drying section on the other - are arranged opposite each other on both sides of the web.
  • This also means that one type of drying section alternates with the other. In the present case, however, this only applies to the first leg of the V.
  • the second leg - and also in the region of the deflection - similar dry sections are arranged opposite each other. Note that it could be different. So it would be entirely possible to design the assembly of the first leg of the V in the same way as that of the second leg, or to interchange the assembly of the two legs.
  • drying legs of the same type lie opposite each other in both legs.
  • the paper web 11 runs essentially in a straight line through the entire device, starting with the two rollers 10, 20 to last drying section, which in turn is an IR drying section.
  • the embodiment according to FIG. 11 again has a straight paper web guide. Different drying sections face each other.
  • FIG. 12 shows a system similar to that according to FIG. 9.
  • the special thing here, however, is that support air beams are integrated in the elements of the drying section.
  • the individual infrared dryer elements are designed in such a way that they can create an air cushion between them and the coated paper web.
  • FIG. 13 shows an embodiment in which the web runs through the nip from bottom to top.
  • the path need not necessarily be vertical; it can also be inclined against the vertical.
  • one-sided or two-sided application of coating color is possible.
  • FIGS. 14a to 14d show embodiments of air bar beams.
  • the airfoil of the airbar according to FIG. 14a has a single row of bores from which the air flows out.
  • the holes are arranged along a straight line.
  • the bores are offset from one another.
  • two rows of air bores are arranged transversely to the direction of web travel, again in each case along a straight line.
  • the direction of web travel is indicated by an arrow A.
  • the two supporting air beams 50, 60 have slots. These can extend over the entire width of the web (ie over the entire length of the individual bar); however, several such slots can also be arranged one behind the other per bar. As can be seen, the slot in each bar is located upstream in relation to the incoming paper web 11. An air curtain emerges from the slots - see arrows B.
  • an air bar 60 can be seen.
  • This in turn has air slots in its two edge regions, which extend over the entire width of the paper web and thus over the entire length of the air bar.
  • Arrows B are again shown here, each of which is intended to illustrate an "air curtain”.
  • This box is provided with a row of holes 60.2. The air that was brought in from the slots is sucked in again through these bores and then discharged laterally — not shown here — from box 60.1.
  • This arrangement is used to produce a stable air cushion.
  • a perforated plate 60.2 is provided in the hollow air beam 60.
EP19940111844 1993-08-07 1994-07-29 Dispositif de l'enduction d'une bande de papier Revoked EP0643168B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19940111844 EP0643168B1 (fr) 1993-08-07 1994-07-29 Dispositif de l'enduction d'une bande de papier

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP93112695A EP0643167A1 (fr) 1993-08-07 1993-08-07 Dispositif d'enduction d'un bande de papier
EP93112695 1993-08-07
DE4400158 1994-01-05
DE4400158 1994-01-05
EP19940111844 EP0643168B1 (fr) 1993-08-07 1994-07-29 Dispositif de l'enduction d'une bande de papier

Publications (2)

Publication Number Publication Date
EP0643168A1 true EP0643168A1 (fr) 1995-03-15
EP0643168B1 EP0643168B1 (fr) 1998-01-14

Family

ID=27205968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940111844 Revoked EP0643168B1 (fr) 1993-08-07 1994-07-29 Dispositif de l'enduction d'une bande de papier

Country Status (1)

Country Link
EP (1) EP0643168B1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29511088U1 (de) * 1995-07-08 1995-09-14 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Herstellen einer gestrichenen Materialbahn
US5855672A (en) * 1995-05-20 1999-01-05 Voith Sulzer Papiermaschinen Gmbh Stationary sliding bar
EP0928845A3 (fr) * 1998-01-13 2000-04-19 Voith Sulzer Papiertechnik Patent GmbH Dispositif pour appliquer un liquide ou un produit pâteux sur une bande en mouvement, particulièrement de papier ou de carton
EP1505200A1 (fr) * 2003-07-31 2005-02-09 Voith Paper Patent GmbH Dispositif pour guider une bande fibreuse en mouvement
EP1564329A1 (fr) * 2004-02-14 2005-08-17 Voith Paper Patent GmbH Section de post-séchage
CN109894327A (zh) * 2019-03-21 2019-06-18 武汉金华腾科技有限公司 一种加工热升华数码转印印花纸的涂布机及其加工方法
CN111570200A (zh) * 2020-05-25 2020-08-25 杨炳军 一种二极管上胶设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989004890A1 (fr) * 1987-11-26 1989-06-01 Valmet Oy Procede et dispositif de sechage d'un bande de papier ou similaire lors de l'appret de sa surface par voie automatique
DE4029487A1 (de) * 1989-09-25 1991-04-04 Valmet Paper Machinery Inc Verfahren und vorrichtung zum fuehren einer papierbahn in der streichmaschine
EP0507218A1 (fr) * 1991-04-04 1992-10-07 J.M. Voith GmbH Section de séchage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989004890A1 (fr) * 1987-11-26 1989-06-01 Valmet Oy Procede et dispositif de sechage d'un bande de papier ou similaire lors de l'appret de sa surface par voie automatique
DE4029487A1 (de) * 1989-09-25 1991-04-04 Valmet Paper Machinery Inc Verfahren und vorrichtung zum fuehren einer papierbahn in der streichmaschine
EP0507218A1 (fr) * 1991-04-04 1992-10-07 J.M. Voith GmbH Section de séchage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BUCKLEY,E.L.: "Different Technologies and Applications of Drying and Spooner-Tec Air-Support.", BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, vol. 59, no. 4, October 1988 (1988-10-01), APPLETON US, pages 3919, XP000028285 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5855672A (en) * 1995-05-20 1999-01-05 Voith Sulzer Papiermaschinen Gmbh Stationary sliding bar
US6174368B1 (en) 1995-05-20 2001-01-16 Voith Sulzer Papiermaschinen Gmbh Stationary sliding bar
US6402842B1 (en) 1995-05-20 2002-06-11 Voith Sulzer Papiermaschinen Gmbh Stationary sliding bar
DE29511088U1 (de) * 1995-07-08 1995-09-14 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Herstellen einer gestrichenen Materialbahn
EP0928845A3 (fr) * 1998-01-13 2000-04-19 Voith Sulzer Papiertechnik Patent GmbH Dispositif pour appliquer un liquide ou un produit pâteux sur une bande en mouvement, particulièrement de papier ou de carton
EP1505200A1 (fr) * 2003-07-31 2005-02-09 Voith Paper Patent GmbH Dispositif pour guider une bande fibreuse en mouvement
EP1564329A1 (fr) * 2004-02-14 2005-08-17 Voith Paper Patent GmbH Section de post-séchage
CN109894327A (zh) * 2019-03-21 2019-06-18 武汉金华腾科技有限公司 一种加工热升华数码转印印花纸的涂布机及其加工方法
CN111570200A (zh) * 2020-05-25 2020-08-25 杨炳军 一种二极管上胶设备
CN111570200B (zh) * 2020-05-25 2021-05-25 江西兰丰科技有限公司 一种二极管上胶设备

Also Published As

Publication number Publication date
EP0643168B1 (fr) 1998-01-14

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