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EP0406529B1 - Dispositif d'enduction - Google Patents

Dispositif d'enduction Download PDF

Info

Publication number
EP0406529B1
EP0406529B1 EP90107009A EP90107009A EP0406529B1 EP 0406529 B1 EP0406529 B1 EP 0406529B1 EP 90107009 A EP90107009 A EP 90107009A EP 90107009 A EP90107009 A EP 90107009A EP 0406529 B1 EP0406529 B1 EP 0406529B1
Authority
EP
European Patent Office
Prior art keywords
coating
roller
doctor blade
blade
throttle
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
EP90107009A
Other languages
German (de)
English (en)
Other versions
EP0406529A2 (fr
EP0406529A3 (en
Inventor
Martin Dr.-Ing. 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.)
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
Priority claimed from DE3942590A external-priority patent/DE3942590C2/de
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0406529A2 publication Critical patent/EP0406529A2/fr
Publication of EP0406529A3 publication Critical patent/EP0406529A3/de
Application granted granted Critical
Publication of EP0406529B1 publication Critical patent/EP0406529B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades

Definitions

  • the invention relates to a coating device according to the preamble of claim 1.
  • a coating device is known from FR-A 2 606 673.
  • an outlet channel is provided which first discharges the excess coating material from the application chamber along the doctor element.
  • the coating slip is fed along the web and not along the doctor element. Interruptions of the feed and discharge channels must be provided in a certain area of the same so that this flow guidance is possible.
  • a flow body is provided which separates the coating slip flowing along the web to the doctor element from the excess amount of the coating slip leaving the application space.
  • an application unit in which the coating slip is also supplied to the doctor element or its metering edge lying against the web through a cover body along the web.
  • an excess of coating slip is removed from the application area at the end of the cover body on the web entry side.
  • a hydrodynamic pressure is to be generated in the area of the cover body and the web.
  • the purpose is pursued, by means of a precisely defined discharge point of the coating slip at the end of the application unit at the web entry end, to prevent air being carried along by the web into the order area.
  • the object of the invention is to improve the quality of the applied stroke with regard to uniformity. Because of the high web speeds, it seems to be difficult with the previously known application devices of the generic type to prevent turbulence occurring in the coating slip.
  • the material web is guided by the counter roller 2 in the area of the coating blade 4.
  • the coating slip passes from the chamber 10 via the mouth channel 11 'to the mouth 11 and from there to the coating blade 4.
  • the coating slip is supplied with a certain excess, which in this case, however, can be considerably smaller than in the previously known coating devices.
  • An upper plate 1 as a cover body forms the throttle gap 8 with a width (width) of between 3 and 15 mm, preferably between 5 and 8 mm, relative to the coating blade 4.
  • the length of this channel is between 5 and 25 mm, preferably between 5 and 15 mm.
  • the tip 16 of the plate 1 (that is to say the edge which is rounded at most with a radius of 1 mm and is close to the counter roller 2) is approximately 3 to 10 mm away from the counter roller 2.
  • the plate 1 forms with another plate 5 as a base cover body from the application space 9 on the doctor blade 4, where the coating compound flows from the mouth 11 to the scraper edge of the doctor blade, leading further throttle channel (drain channel) 7, which is essentially here Area between the mouth 11 and the front boundary wall 13 of the mouth 11 or the mouth channel 11 'and the chamber 10 extends. Its height is approximately between 3 and 6 mm and its length is essentially between ten and twenty times the specified height.
  • the throttle ducts are practically slit-shaped in sections parallel to the central longitudinal axis of the counter-roller 2, because in this direction they have an overall length corresponding to the length of the counter-roller, for example at 8 m length of the counter-roller 2 and a channel (slot) height of 5 or 8 mm (see for example "e") exceeds the latter by orders of magnitude (see for example also FIG. 5).
  • the application chamber prefferably feed the coating slip directly to the roller 2, which is then wrapped or touched by the web in another area, in which the coating slip is then transferred to the web.
  • FIG. 2 shows yet another possible embodiment of the base body and cover body.
  • the reference symbols are each provided with an additional apostrophe.
  • the throttle channels each meet the conditions.
  • the feature of claim 2 is also fulfilled.
  • a doctor blade 30 can also be used as a doctor blade element, which is rotatably guided in a doctor blade bed 31, which is fastened to a support spring 32 designed as a leaf spring in the doctor blade clamping bracket 33, 34.
  • the second throttle channel 8 ′′′ is formed by the cover body 1 ′′′ opposite the doctor holder 31 of the roller doctor 30.
  • the throttle channel 7 ′′′ can be controlled by a throttle slide 21 with throttle windows 22 in its throttle strength.
  • a throttle strip 24 with corresponding windows 25 is assigned to each slide.
  • the throttling action of the throttle channel can also be based essentially solely on the action of this slide 21.
  • This embodiment can, of course, be adapted in a very comprehensive manner to the most varied conditions of the coating process, for example also the parameters of the coating composition, such as, for example, their consistency.
  • FIG. 6 shows a further variant of the arrangement according to the invention, the cover body 36 forming the first throttle duct 37 directly with a very thick front wall 43 of the mouth 41 of the chamber 50 for the coating slip.
  • this front wall 43 forms an essentially load-bearing component of the coating device or of the support beam for the coating blade 4.
  • Dash-dotted lines show how a constriction point at the outlet of the outlet channel 41 can be formed by a nose-shaped projection 44 of the front wall 43.
  • doctor blade 4 It is customary to adjust the doctor blade 4 by means of a pressure piece engaging in its free area, which can also be divided along the axis of the counter roller or the width of the paper web in order to exert different pressures on the doctor blade 4. This leads to a deflection of the same, so that the second throttle channel 8, 8 ', 8 ⁇ etc. could be changed quite greatly in its dimension.
  • a coating device is used in which the contact angle of the coating blade 4 on the counter roller or paper web is kept constant by appropriate swivel conditions. Such a device has become known, inter alia, from US-A-46 37 338. Various other design options in this regard are known.

Landscapes

  • Coating Apparatus (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Seal Device For Vehicle (AREA)
  • Glass Compositions (AREA)
  • Finger-Pressure Massage (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Claims (10)

  1. Dispositif d'application de couches, en particulier dispositif d'enduction au déroulé sur des bandes de papier ou de carton, dans lequel :
    - il est prévu au guidage, une racle d'application de couche (4, 30) au contact de la bande près d'un rouleau de celle bande ou directement au niveau de ce rouleau par son bord ou le long d'une ligne d'enduction, ainsi qu'une chambre (10) dans laquelle le produit d'enduction est soumis à une surpression par rapport à l'atmosphère.
    - le produit d'enduction peut être amené de la chambre par l'intermédiaire d'une embouchure parallèle à la bande c'est-à-dire au rouleau d'appui, à l'embouchure occupant toute la largeur de la bande ou du rouleau, associée à une racle d'application à lame ou à rouleau,
    - le produit en excès se trouvant au moins à proximité de la racle peut être évacué par au moins un ou plusieurs canaux parallèles (7, 7', 7'', 7'''; 22, 25, 27) répartis selon la direction de l'axe de rotation du rouleau, dans une zone éloignée de celui-ci.
    - un élément de recouvrement (1, 1', 1''; 35, 36) est disposé près du rouleau, au moins dans sa partie proche de la racle (9, 30) tandis que les canaux d'évacuation (7, 7', 7'', 7'''; 22, 25, 37) sont placés le long de sa paroi opposée éloignée du rouleau.
       Ce dispositif étant caractérisé en ce que l'élément de recouvrement (1, 1', 1''; 35, 36) forme, le long de la racle d'enduction (4, 30), jusqu'à proximité du bord de la racle ou d'une ligne d'enduction de cette racle (4, 30), une fente ou un canal d'étranglement (8, 8', 8'') conduisant le produit jusqu'au bord ou à la ligne d'enduction, tandis que le canal d'évacuation (7, 7', 7'', 7''', 37), disposé en coupe parallèlement à l'axe du rouleau, à la forme d'une fente présentant un effet élevé d'étranglement sur toute la longueur du rouleau, ou encore les canaux, répartis sur toute la largeur de la bande, sont équipés d'un dispositif réglable d'étranglement (21, 25).
  2. Dispositif d'enduction selon la revendication 1, caractérisé en ce que le second canal d'étranglement ((8) a une longueur (F), dans la direction d'ecoulement le long de la lame ou du support de racle, comprise entre 5 et 25 mm, de préférence 5 et 25 mm, tandis que sa largeur (e) est comprise entre 3 et 15, de préférence 5 et 8 mm.
  3. Dispositif d'enduction selon la revendication 1 ou 2, caractérisé en ce qu'il comporte, outre l'embouchure (11) de la chambre de dépôt (10) ou son canal de sortie (11') et l'élément de recouvrement (1, 1', 1'', 1'''), une embase (5, 5', 5'') qui forme avec cet élément, par leurs faces en regard, le canal d'évacuation (7, 7', 7'', 7'''; 22, 37).
  4. Dispositif selon une des revendications 1 à 3, caractérisé en ce que l'élément de recouvrement (1) à l'extrémité du second canal (8) qu'il forme avec la lame (4) ou le support de racle et à proximité du bord d'enduction de l'élément racleur, se termine essentiellement par un bord de rayon de courbure ne dépassant pas 2 mm, de préférence égal à 1 mm environ, ce bord se trouvant, par rapport au rouleau d'appui (2), à une distance (s) comprise entre 3 et 15 mm, de préférence 5 à 10 mm.
  5. Dispositif selon une des revendication 3 ou 4, caractérisé en ce que l'embase (5) est disposée, par rapport à la lame (4) ou au support de racle, à une distance ne dépassant pas plus de 10 mm la distance séparant l'élément de recouvrement (1) de la lame (4) ou du support de racle, mais qui est au moins égale à la largeur (e) du second canal d'étranglement (8) formé le long de la racle (4, 30).
  6. Dispositif selon une des revendications 3 à 5, caractérisé en ce que l'embase (5) le long de son bord proche de la lame (4) ou du support de racle, dans la zone du premier canal de l'évacuation (7), présente un arrondi ayant un rayon d'au moins 5 mm.
  7. Dispositif selon une des revendications 1 à 6, caractérisé en ce que la hauteur (largeur) du premier canal d'évacuation (7) est comprise entre 3 et 6 mm.
  8. Dispositif selon la revendication 7, caractérisé en ce que la longueur du premier canal d'évacuation (7) est de dix à vingt fois sa hauteur.
  9. Dispositif selon une des revendications 1 à 7, caractérisé en ce que le premier canal d'évacuation (7''') peut être modulé dans son action de dosage, au moyen d'un tiroir (21) percé d'orifices de dosage (22).
  10. Dispositif d'enduction selon une des revendications 1 à 9, caractérisé en ce que l'élément de recouvrement (1), le canal d'évacuation (7) et le second canal (R) occupent sensiblement toute la longueur de la lame d'enduction (4) ou du support de racle (31), l'élément de recouvrement (1) étant constitué essentiellement d'une bande ou d'une plaque, à profil plat ou courbé, dont la distance, par rapport au bord d'application de la lame (4) ou du rouleau d'enduction (30) comme par rapport au rouleau d'appui, s'accroît constamment, à partir d'un minimum de 1 mm (distance par rapport au rouleau) et de 10 mm (distance par rapport au bord d'application).
EP90107009A 1989-06-22 1990-04-11 Dispositif d'enduction Expired - Lifetime EP0406529B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3920381 1989-06-22
DE3920381 1989-06-22
DE3942590 1989-12-22
DE3942590A DE3942590C2 (de) 1989-06-22 1989-12-22 Streicheinrichtung

Publications (3)

Publication Number Publication Date
EP0406529A2 EP0406529A2 (fr) 1991-01-09
EP0406529A3 EP0406529A3 (en) 1991-10-23
EP0406529B1 true EP0406529B1 (fr) 1994-06-29

Family

ID=25882200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107009A Expired - Lifetime EP0406529B1 (fr) 1989-06-22 1990-04-11 Dispositif d'enduction

Country Status (9)

Country Link
US (1) US5078081A (fr)
EP (1) EP0406529B1 (fr)
JP (1) JPH0330862A (fr)
AT (1) ATE107981T1 (fr)
BR (1) BR9002989A (fr)
CA (1) CA2019703A1 (fr)
ES (1) ES2055823T3 (fr)
FI (1) FI902995A7 (fr)
NO (1) NO902079L (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133996A (en) * 1991-10-29 1992-07-28 Beloit Corporation Method and apparatus for coating a web
US5376177A (en) * 1993-08-09 1994-12-27 Macmillan Bloedel Limited Coat weight profiling
US5599369A (en) * 1994-04-29 1997-02-04 Owens-Brockway Glass Container Inc. Hood for metal-oxide vapor coating glass containers
DE4444779B4 (de) * 1994-12-15 2005-08-04 Voith Sulzer Papiermaschinen Gmbh Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
US5599393A (en) * 1995-04-25 1997-02-04 Macmillan Bloedel Limited Metering rod coaters
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
US5902401A (en) * 1997-07-09 1999-05-11 Pevifibe Papers Inc. Coater head
USRE40961E1 (en) * 1999-01-14 2009-11-10 Nok Kluber Co., Ltd. Coating layer forming machine and method of forming it
JP4830843B2 (ja) * 2006-12-21 2011-12-07 東洋紡績株式会社 反応カップ収納器、及び反応測定器具セット
EP2353736A1 (fr) * 2010-01-29 2011-08-10 3M Innovative Properties Company Procédé continu pour la formation d'un film multicouche et film multicouche préparé selon un tel procédé
CN103890112B (zh) * 2011-10-19 2018-02-23 3M创新有限公司 具有薄熔融涂层的制品及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3612248A1 (de) * 1985-05-09 1986-11-27 Consolidated Papers Inc., Wisconsin Rapids, Wis. Streicheinrichtung
DE3513063C2 (fr) * 1985-04-12 1988-12-29 Jagenberg Ag, 4000 Duesseldorf, De

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE360408B (fr) * 1968-12-30 1973-09-24 Waertsilae Oy Ab
US4405661A (en) * 1981-09-10 1983-09-20 Beloit Corporation Blade type fountain coater and method
DE3338095A1 (de) * 1983-10-20 1985-05-09 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung
CH663362A5 (de) * 1984-01-07 1987-12-15 Jagenberg Ag Vorrichtung zum beschichten von ueber eine stuetzwalze laufenden materialbahnen mit regelbarer auftragsstaerke.
FI71081C (fi) * 1984-05-11 1986-11-24 Waertsilae Oy Ab Bestrykningsanordning
DE3438380A1 (de) * 1984-10-19 1986-04-24 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung zur beschichtung laufender warenbahnen
DE3505769A1 (de) * 1985-02-20 1986-08-21 J.M. Voith Gmbh, 7920 Heidenheim Streicheinrichtung
DE3616645A1 (de) * 1986-05-16 1987-11-19 Voith Gmbh J M Streicheinrichtung
FI81640C (fi) * 1986-11-14 1990-11-12 Valmet Paper Machinery Inc Short-dwell-bestrykningsanordning foer bestrykning av en materialbana med bestrykningsmassa.
DE3734900A1 (de) * 1987-05-07 1988-12-01 Voith Gmbh J M Einrichtung zum beschichten einer laufenden papier- oder kartonbahn

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3513063C2 (fr) * 1985-04-12 1988-12-29 Jagenberg Ag, 4000 Duesseldorf, De
DE3612248A1 (de) * 1985-05-09 1986-11-27 Consolidated Papers Inc., Wisconsin Rapids, Wis. Streicheinrichtung

Also Published As

Publication number Publication date
JPH0330862A (ja) 1991-02-08
NO902079D0 (no) 1990-05-10
ES2055823T3 (es) 1994-09-01
FI902995A7 (fi) 1990-12-23
NO902079L (no) 1990-12-27
BR9002989A (pt) 1991-08-20
EP0406529A2 (fr) 1991-01-09
CA2019703A1 (fr) 1990-12-22
ATE107981T1 (de) 1994-07-15
FI902995A0 (fi) 1990-06-14
US5078081A (en) 1992-01-07
EP0406529A3 (en) 1991-10-23

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