EP0777785B1 - Procede et dispositif d'enduction de bandes de materiau, notamment des bandes de papier ou de carton - Google Patents

Procede et dispositif d'enduction de bandes de materiau, notamment des bandes de papier ou de carton Download PDF

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Publication number
EP0777785B1
EP0777785B1 EP95924322A EP95924322A EP0777785B1 EP 0777785 B1 EP0777785 B1 EP 0777785B1 EP 95924322 A EP95924322 A EP 95924322A EP 95924322 A EP95924322 A EP 95924322A EP 0777785 B1 EP0777785 B1 EP 0777785B1
Authority
EP
European Patent Office
Prior art keywords
strip
path
disclosed
concave
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.)
Expired - Lifetime
Application number
EP95924322A
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German (de)
English (en)
Other versions
EP0777785A1 (fr
Inventor
Ingo Becker
Reinhard Knop
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 Paper Jagenberg GmbH
Original Assignee
Jagenberg Papiertechnik 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 Jagenberg Papiertechnik GmbH filed Critical Jagenberg Papiertechnik GmbH
Publication of EP0777785A1 publication Critical patent/EP0777785A1/fr
Application granted granted Critical
Publication of EP0777785B1 publication Critical patent/EP0777785B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/0012—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours
    • 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

Definitions

  • Application rollers (DE-C 36 23 402) and application chambers open to the material web (EP-C 0 051 698) are known as application systems for the excess application.
  • mechanical doctor elements such as doctor blades (DE-C 36 23 402), doctor rods (DE-C 30 22 955), doctor blades (EP-C 0 109 520) and so-called air knives, which strip off the excess with compressed air from a slot nozzle (DE-A 40 14 463).
  • the material web is usually guided in excess when applying the coating material and by scraping off the excess around a counter roller and is thus supported by the latter over its entire width during the coating process.
  • the invention is based, a generic method and a task Generic device to improve so that at very high web speeds a coating with a uniform line pattern is achieved.
  • the invention is based on the knowledge that errors in the line drawing after Scraping off the excess due to unevenness of the excess film that are no longer compensated for during dosing.
  • Coating at high web speeds work due to the convex, i.e. H. web guide curved towards the uncoated side between application and scraping the excess of significant centrifugal forces onto the coating material a, which are directed away from the web.
  • the centrifugal forces lead to Spraying of coating material and / or to an irregularity, e.g. B. to form tension lines of the film reaching the dosing element Coating material.
  • the track is concave, that is to say coated Curved side.
  • the centrifugal forces thus act in the direction of the path, so that not only the negative effects listed above are avoided, but even by the centrifugal forces an equalization of the film Coating material is effected before dosing.
  • Another advantage is that the negative effects of in the coating material air trapped or entrained by the web is reduced will. Air in the coating material or on the web can lead to errors in the line drawing lead to uncovered places on the end product. The one to the train Executed centrifugal forces force the air off the web before dosing away, so that it escapes or at least accumulates on the side facing away from the train Side of the excess film, which is then doctored off. The complete wetting of the web with coating material is even with air pockets guaranteed.
  • FIGS 1 to 7 show in principle the invention with various orders and Dosing systems.
  • FIG. 8 shows a concrete embodiment in a side view.
  • All coating devices shown in the figures have an application system 1 and in the running direction of the paper or cardboard web 2 arranged behind a metering system 3 with a dosing element.
  • Application system 1 uses coating color as Coating material applied in excess to the paper or cardboard web 2 and then from the dosing element of the dosing system 3 to the desired one Line weight scraped off again.
  • Embodiments according to Figures 1, 2, 5, 6, 7 and 8 are roller applicators with an applicator roller 6 scooping from an ink pan 4, the roller or driven in the opposite direction to the web 2, the excess film 7 is applied thereon.
  • the embodiment according to FIG. 3 shows a so-called short dwell coater a nozzle chamber 8 open towards the web 2, the coating color in excess and with increased pressure is supplied.
  • the application chamber 8 is on its outlet side of the dosing element, e.g. B. a doctor knife 9, completed.
  • metering systems 3 To strip off the excess film 7 to the desired coating weight also known metering systems used: In the embodiments according to Figures 1, 2, 4, 6, 7 and 8 contain the metering systems 3 a scraper 9 as Dosing element.
  • the scraper knife 9 is in one with the foot to the web 2 movable back in a scraper beam 10 clamp beam 11 attached.
  • the scraper knife 9 of a support bar 12 supported, which is adjustable on the top of the doctor bar 10 is attached.
  • the contact pressure of the doctor knife 9 can be the web 2 by moving the scraper knife base with the clamping bar 11 set without the one set by pivoting the scraper bar 10 To change the angle between the scraper knife tip and the web 2.
  • a short dwell applicator is used with a Scraper knife 9 is used to place a pre-metered excess film 7 on the web 2 to apply.
  • the final dosing is done with a blade dosing system that also has a scraper knife 9 as a final metering element.
  • the embodiment according to figure 5 contains a roller applicator 1 and a metering system 3 with an air knife as Dosing element.
  • the air knife consists of an over the width of the web 2nd extending slot nozzle 13 which is connected to a compressed air supply. Out a jet of compressed air is directed against the excess film 7 to the slot nozzle 13 to strip off the excess to the desired coat weight.
  • the path 2 up to dosing straight or only slightly convex, i. e. for the uncoated Curved side, guided, so that the positive effects of the concave web guide cannot be undone or only to a non-disturbing extent.
  • a slight convex curvature can have the advantage that the Metering element 9 does not spray scraped material against the web 2. Because the concave curved section compensates for irregularities in the excess film 7, it is possible under certain circumstances, the web 2 in front of the concavely curved Leg, e.g. when applying the excess film 7, convexly curved lead without errors in the line diagram after dosing.
  • FIGS 6 and 7 show two ways of realizing the concave path:
  • the paper or cardboard web 2 is two guide rollers 14, 15 arranged parallel to one another at a distance. Between the Application system 1 and the metering system 3, the web 2 by means of an air guide nozzle 16 concavely curved. Compressed air from the air guide nozzle 16 is coated against Side of the web 2 passed, the web tension is set so that the sets the desired curvature.
  • the outlet-side guide roller 15 also supports the Lane 2 when dosing against the contact pressure of the doctor knife 9.
  • the curvature can be due to or instead of an overpressure on the coated web side the web 2 also causes a vacuum on the uncoated side will.
  • Figure 7 shows the principle of a preferred embodiment, in which the coated and thus sensitive web 2 during the concave guidance of a corresponding curved guide surface is supported on the uncoated side, preferred with a circumferential support band 17. That preferably from an elastic Support belt 17 made of material is also deflected by the two deflecting the web 2 Guide rollers 14, 15 deflected. One or both idlers 14, 15 are preferred only the inlet-side idler 14 are driven. The drive only on the inlet side Guide roller 14 has the advantage that the strand 2 supporting the strand 18 under is less voltage and can therefore be curved more easily concave.
  • the curvature of the strand 18 is caused by a vacuum between the two Runs and / or by an overpressure acting from the outside against the coated side causes, e.g. to that described in the embodiment according to FIG Wise.
  • a circumferential support band 17 concavely curved ones can also be used mechanical guide surfaces are used against which the web 2, z. B. with compressed air, is pressed.
  • FIG. 8 The coating device shown in principle in FIG. 7 is shown in FIG. 8 shown in more detail:
  • the coating device has 2 frame parts on both long sides of the web 5 19, in which the two are formed as backup rollers at a distance from one another Guide rollers 14, 15, the application system 1 and the metering system 3 are suspended. Both support rollers 14, 15 are of the endless, over the working width of the Circumferential device extending support band 17 made of an elastic material.
  • the support belt 17 is at the web speed of the web 2 from the support roller 14 driven, which is connected to a rotary drive, not shown.
  • the application system 1 contains an application roller 6, which is wrapped around the web 2 Area against the support roller 14 is adjustable.
  • the preferably co-moving to Counter roller 14, that is to say in the opposite direction of rotation, driven application roller 6 draws from a paint tray 5 and is together with this on a swivel lever 20 can be raised and lowered.
  • the dispensing system 3 arranged in 15 is in principle in the explanation of FIG. 1 described.
  • the scraper bar 10 with the scraper knife 9 carrying Clamping bar 11 is between two side parts 21 around the doctor knife tip hung pivotably.
  • the side parts 21 themselves are with the scraper bar 10 pivoted, e.g. B. to perform a change of the doctor knife 9 to be able to.
  • the of the circumference of the support rollers 14, 15 and the free strand 18 the support band 17 limited space 22 is sealed and can be subjected to negative pressure, around the desired concave curvature of the web 2 supporting To be able to adjust trums 18.
  • the coated one Side of the web 2 between the applicator roller 6 and the metering element 9 with Compressed air can be applied.
  • the space 23 between the application roller 6 and the metering element (scraper knife 9) with sealing elements with the exception of the Lane 2 open side sealed and connected to a compressed air supply. The Lane 2 is thus pressed without contact against the guide surface formed by the strand 18.
  • the web 2 When coating, the web 2 is first of all from the inlet-side support roller 14 deflected, it lies on the outside on the support belt 17. From the application roller 6 coating color is applied in excess to the web 2, which then, from supported the strand 18 of the support band 17, concavely curved to the second Back-up roller 15 is guided.
  • the scraper knife 9 is in the run-up area of the web 2 arranged on the support roller 15 so that the support roller 15 the web 2 against the Pressure of the doctor blade tip is supported before this from the support roller 15 in such a way largely convex that negative effects such as paint splashing, Stress ring formation etc. occur.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Claims (12)

  1. Procédé d'enduction de bandes de matériau (2), en particulier des bandes de papier ou de carton, dans lequel une matière d'enduction est déposée en excès sur la bande de matériau (2) en défilement et l'excès est ensuite raclé pour atteindre le poids d'enduction souhaité, caractérisé en ce qu'entre le dépôt et le raclage, la bande de matériau (2) est guidée, au moins sur un trajet partiel, avec une courbe concave telle que l'axe de la courbure s'étende parallèlement à la bande de matériau (2) et transversalement à la direction du défilement de la bande, sur le côté de l'enduction, à distance de celle-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que la bande de matériau (2) est guidée en courbe concave depuis le dosage jusqu'au raclage.
  3. Procédé selon la revendication 1, caractérisé en ce qu'à la suite du trajet partiel courbé concave et jusqu'au dosage, la bande de matériau (2) est guidée en ligne droite ou selon une courbe seulement légèrement convexe, à savoir en direction du côté non enduit.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que la bande de matériau (2) est soutenue, sur le trajet courbé concave, sur son côté non enduit, par une surface guide courbée de façon correspondante, en particulier par une bande de soutien (17) qui circule en circuit fermé.
  5. Procédé selon la revendication 4, caractérisé en ce que la bande de matériau (2) est pressée contre la surface guide au moyen d'air comprimé.
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que la courbure concave de la bande de matériau (2) est obtenue au moyen d'une dépression sur le côté non enduit et/ou au moyen d'une surpression sur le côté enduit.
  7. Dispositif d'enduction de bandes de matériau (2), en particulier des bandes de papier ou de carton, comprenant un système de dépôt (1) qui dépose de la matière d'enduction en excès sur la bande de matériau (2) et un système de dosage (3) comprenant un élément de dosage (9, 13) qui racle la matière d'enduction en excès, caractérisé en ce que, entre le dépôt et le raclage, la bande de matériau (2) est guidée, au moins sur un trajet partiel, avec une courbure concave, dans laquelle l'axe de la courbure s'étend parallèlement à la bande de matériau (2) et transversalement à la direction du défilement de la bande, sur le côté de l'enduction, à distance de celle-ci.
  8. Dispositif selon la revendication 7, caractérisé en ce que la bande de matériau (2) est courbée concave sur tout le trajet entre le système de dépôt (1) et l'élément de dosage (9, 13).
  9. Dispositif selon la revendication 7, caractérisé en ce qu'à la suite du trajet partiel courbé concave et jusqu'à l'élément de dosage (9, 13), la bande de matériau (2) est guidée en ligne droite ou selon une courbe seulement légèrement convexe, à savoir en direction du côté non enduit.
  10. Dispositif selon une des revendications 7 à 9, caractérisé en ce que la bande de matériau (2) est soutenue, sur le trajet partiel guidé concave, sur son côté non enduit, par une surface guide courbée de façon correspondante, en particulier par une bande de soutien (17) qui circule en circuit fermé.
  11. Dispositif selon la revendication 10, caractérisé en ce que, dans la région du trajet partiel courbé concave, des moyens (16, 23) sont agencés sur le côté enduit pour presser la bande de matériau (2) contre la surface guide sans contact.
  12. Dispositif selon une des revendications 7 à 11, caractérisé en ce que, dans la région du trajet partiel courbé concave, sont prévus des moyens servant à produire une dépression agencés sur le côté non enduit et/ou des moyens servant à produire une surpression agencés sur le côté enduit.
EP95924322A 1994-08-24 1995-06-24 Procede et dispositif d'enduction de bandes de materiau, notamment des bandes de papier ou de carton Expired - Lifetime EP0777785B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4429964 1994-08-24
DE4429964A DE4429964A1 (de) 1994-08-24 1994-08-24 Verfahren und Vorrichtung zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen
PCT/EP1995/002464 WO1996006226A1 (fr) 1994-08-24 1995-06-24 Procede et dispositif d'enduction de bandes de materiau, notamment des bandes de papier ou de carton

Publications (2)

Publication Number Publication Date
EP0777785A1 EP0777785A1 (fr) 1997-06-11
EP0777785B1 true EP0777785B1 (fr) 1998-08-12

Family

ID=6526409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95924322A Expired - Lifetime EP0777785B1 (fr) 1994-08-24 1995-06-24 Procede et dispositif d'enduction de bandes de materiau, notamment des bandes de papier ou de carton

Country Status (10)

Country Link
US (1) US5869143A (fr)
EP (1) EP0777785B1 (fr)
JP (1) JP2818304B2 (fr)
KR (1) KR100197308B1 (fr)
AT (1) ATE169701T1 (fr)
AU (1) AU2887895A (fr)
CA (1) CA2198264A1 (fr)
DE (2) DE4429964A1 (fr)
FI (1) FI107279B (fr)
WO (1) WO1996006226A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1285785B1 (it) * 1996-08-09 1998-06-18 Cartiere Burgo Spa Perfezionamenti a dispositivi per l'appicazione di patina su carta.
DE19732138A1 (de) * 1996-08-26 1999-01-28 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
DE19634448C2 (de) * 1996-08-26 1999-06-24 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
DE19822505A1 (de) 1998-05-19 1999-11-25 Voith Sulzer Papiertech Patent Beschichtungsverfahren
DE69923745T2 (de) * 1998-10-27 2005-07-07 Fuji Photo Film Co., Ltd., Minami-Ashigara Beschichtungsverfahren
KR101931647B1 (ko) 2017-04-27 2018-12-24 임봉학 골판지 코팅 장치

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030168B (de) * 1951-09-07 1958-05-14 John Waldron Corp Vorrichtung zum Anblasen von Werkstoff-, insbesondere von mit Farbmasse ueberzogenenPapierbahnen
DE2012598A1 (de) * 1970-03-17 1971-10-21 Voith Gmbh J M Glättschaber-Streicheinrichtung
JPS49130940A (fr) * 1973-04-20 1974-12-16
JPS58205561A (ja) * 1982-05-25 1983-11-30 Fuji Photo Film Co Ltd 塗布方法及び装置
DE3423251A1 (de) * 1983-06-30 1985-01-10 Mathias 4815 Schloss Holte Mitter Vorrichtung zum auftragen stroemungsfaehiger, schaumiger, pastoeser oder fluessiger medien auf substrate
JPH0640990B2 (ja) * 1985-11-15 1994-06-01 富士写真フイルム株式会社 塗布方法
DE3609383C2 (de) * 1986-03-20 1995-04-06 Voith Gmbh J M Einrichtung zur Beschichtung von laufenden Warenbahnen
DE3633833C1 (de) * 1986-10-04 1993-05-06 Vits Maschinenbau Gmbh Verfahren und Vorrichtung zum Auftragen einer fluessigen oder pastoesen Substanz auf eine Materialbahn
JPH07114997B2 (ja) * 1988-03-11 1995-12-13 富士写真フイルム株式会社 塗布方法
JPH0824872B2 (ja) * 1988-06-07 1996-03-13 松下電器産業株式会社 塗布装置
JP2601367B2 (ja) * 1990-04-20 1997-04-16 富士写真フイルム株式会社 塗布方法
DE4014463A1 (de) * 1990-05-07 1991-11-14 Jagenberg Ag Vorrichtung zum beschichten einer materialbahn, insbesondere einer papier- oder kartonbahn
DE4022577C2 (de) * 1990-07-16 1995-11-23 Fibron Gmbh Rakelvorrichtung
JP2942938B2 (ja) * 1992-10-20 1999-08-30 富士写真フイルム株式会社 塗布方法
FI93665C (fi) * 1992-11-13 1995-05-10 Valmet Paper Machinery Inc Menetelmä ja laitteisto paperirainan päällystämiseksi
DE4243518C2 (de) * 1992-12-22 1996-03-28 Feldmuehle Ag Stora Vorrichtungen zum Auftrag von Flüssigkeit auf beide Seiten einer Materialbahn und Verfahren zum Auftrag einer Flüssigkeit auf eine Materialbahn mit diesen Vorrichtungen
JP3224113B2 (ja) * 1993-10-20 2001-10-29 富士写真フイルム株式会社 塗布方法

Also Published As

Publication number Publication date
KR100197308B1 (ko) 1999-06-15
US5869143A (en) 1999-02-09
FI107279B (fi) 2001-06-29
JP2818304B2 (ja) 1998-10-30
DE4429964A1 (de) 1996-02-29
ATE169701T1 (de) 1998-08-15
DE59503187D1 (de) 1998-09-17
EP0777785A1 (fr) 1997-06-11
FI970734A (fi) 1997-02-21
FI970734A0 (fi) 1997-02-21
CA2198264A1 (fr) 1996-02-29
KR970704943A (ko) 1997-09-06
JPH10500358A (ja) 1998-01-13
WO1996006226A1 (fr) 1996-02-29
AU2887895A (en) 1996-03-14

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