EP0965684A2 - Dispositif d'application de materiau fluide ou pâteux sur un bande en mouvement - Google Patents

Dispositif d'application de materiau fluide ou pâteux sur un bande en mouvement Download PDF

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Publication number
EP0965684A2
EP0965684A2 EP99108734A EP99108734A EP0965684A2 EP 0965684 A2 EP0965684 A2 EP 0965684A2 EP 99108734 A EP99108734 A EP 99108734A EP 99108734 A EP99108734 A EP 99108734A EP 0965684 A2 EP0965684 A2 EP 0965684A2
Authority
EP
European Patent Office
Prior art keywords
counter
material web
counter element
around
leveling
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Withdrawn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
EP99108734A
Other languages
German (de)
English (en)
Other versions
EP0965684A3 (fr
Inventor
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
Voith Paper Patent GmbH
Voith Sulzer Papiertechnik Patent 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 Voith Paper Patent GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0965684A2 publication Critical patent/EP0965684A2/fr
Publication of EP0965684A3 publication Critical patent/EP0965684A3/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Withdrawn legal-status Critical Current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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • 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
    • 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

Definitions

  • the invention relates to a device for applying a liquid or pasty application medium on a running material web, in particular made of paper or cardboard, which includes a commissioned work, as well as a First counter element assigned to the work, around which the material web is led around at least over part of its circumference, and further comprises a leveling and / or metering device, and one of the Equalizing and / or dosing device assigned second counter element, around which the material web extends at least over part of its circumference is led around.
  • the generic DE 43 38 776 A1 deals with the risk of wrinkles forming in the web in the section between application unit and leveling / dosing device, if these two work against one and the same counter roller.
  • DE 43 38 776 A1 was proposed to solve this problem, on the one hand the commissioned work and the leveling / dosing device each a separate one Assign the counter roller and the speed of the two counter rollers to control such that a desired tension in the web is ensured.
  • This object is achieved by a device of the beginning mentioned type solved, in which the surface properties of the first Counter element and the second counter element matched to each other are that the material web at least with respect to the first counter element can perform a relative movement.
  • the invention is based on the knowledge that it is possible by deliberately influencing the surface properties of the two counter elements is possible to ensure that only the surface of the leveling or / and metering device assigned counter roll represents a "fixed point" for the material web, i.e. with the material web in essentially non-slip and slip-free Engagement occurs while at least between that assigned to the commissioned work Counter roller and the material web the possibility of a relative movement in the direction of travel of the material web, i.e. at least that Possibility of a predetermined minimum displacement of these two relative to each other. So it is also without coordinated Control of the speeds of the two counter rolls possible, always one Tendency to reduce, if not prevent, tensile stress in the material web.
  • one of the counter elements or even both counter elements can comprise an endless belt, preferably an endless belt, which in the area of the application work or the leveling and / or dosing device is guided around a support shoe is.
  • this can be achieved, for example, by designing at least the surface of the first counter element to be soft, a soft surface being understood to mean a surface which satisfies the following condition: 4 mm ⁇ t ⁇ h B ⁇ C ⁇ 13 mm where t is the thickness of the surface layer, for example the roll cover, in millimeters, h B is the hardness of the surface material in P&J, and c is a constant with the value (1 mm) / (25.4 P&J).
  • the effect of this first variant is based on the fact that the surface at least the first counter roll is so elastic that slight Fluctuations in tension due to the "spring action" at least soft surface of the first counter roll at least partially, preferably can be fully balanced.
  • the hardness of the surface of the first counter element can have a value of at least 40 P&J (hardness test according to Pusey & Jones).
  • the surface of the first mating member is thus much softer formed as, for example, the surface of applicator rollers at LDTA-applicator units (LDTA - L ong D well T ime A pplicator).
  • the hardness of the surface of the second counter element can, for example, have a value of between approximately 50 P&J and approximately 100 P&J, preferably between approximately 60 P&J and approximately 80 P&J. It is also conceivable that the first counter element has a softer surface than the second counter element.
  • the surface of the first counter element is designed with less friction than the surface of the second counter element. It is also proposed that the surface of the first counter element has a coefficient of friction ⁇ of at most 0.45, preferably at most 0.15. So low Coefficients of friction can then be provided, for example, if the surface of the first counter element made of chrome, "chrome slick", Ceramics and the like low-friction materials are formed. In this The material web can fall in the event of variations in tension by sliding movement with respect to the surface of the first counter roll react.
  • a third variant is that the surface of the first Counter element is defined rougher than the surface of the second Counter element.
  • the surface of the first counter element can an average roughness depth, i.e. an arithmetic mean roughness (after DIN 4768), from between 1.5 ⁇ m and 63 ⁇ m, preferably from between 6.3 ⁇ m and 30 ⁇ m.
  • the roughness of the first counter roll has with the result that when the counter-roller rotates a Air boundary layer forms, which rotates with it. In that of the material web extensive area, this air boundary layer forms an air cushion, on which the material web "floats", which is a relative movement of Counter roll and material web enables. Due to the rough training of the Roll surface can thus be achieved that this has a small, dynamic friction coefficients depending on the respective operating conditions having.
  • the three design variants discussed above can be on one and the same counter roll also realized simultaneously and in any combination become.
  • the roughness according to the third Design variant provided in a surface covering of the counter roller be made of a soft material, for example by Embedding fibers in the soft material ("suede effect").
  • the "floating effect" of the roughness of the roller surface dominate at high speeds of the material web, during the "spring effect” of the soft roller surface material low running speeds a relative mobility of material web and first counter roll ensures.
  • the object according to the invention is achieved by a device of the type mentioned at the outset, in which both counter elements are formed by counter rolls, the distance a between the axes of the two counter rolls advantageously fulfilling the condition: 555 mm ⁇ a ⁇ 0.5 ⁇ ((v Max + v min ) / v Max ) ⁇ (W / D) ⁇ 1500 mm
  • v max is the maximum intended running speed of the material web
  • v min is the minimum intended running speed of the material web
  • W is the width of the material web
  • D is the diameter of the second counter roller.
  • the operation of this embodiment is mainly based on that the free length of the material web between the two counter-rollers so large that fluctuations in tensile stress due solely to the inherent elasticity of the material web can be compensated.
  • the free length of the material web should not have a certain limit exceed that of the minimum running speed or the maximum Running speed of the material web, the width of the material web and the diameter of the metering counter roller.
  • the inventor has recognized that with the same running speed of the material web a safe and crease-free web guidance with material webs of different widths achieved by choosing a correspondingly different center distance can be.
  • the counter roll diameter is used as a correction factor because wider machines usually have larger counter-rollers.
  • an application device is generally at 10 designated.
  • a material web 12 is initially in the running direction L by one first counter roll 14 and then passed around a second counter roll 16.
  • the counter rolls 14 and 16 are about their axes A and B in the direction the arrows P or P 'rotatably. Only the second is Counter roller 16 driven in rotation, while the first counter roller 14 under the influence of the entrainment effect runs along with the material web 12.
  • an application unit for the first counter-roller 14 18 assigned For applying liquid or pasty application medium 21 to the Surface 12a of the material web 12 is an application unit for the first counter-roller 14 18 assigned, which in the embodiment according to FIG. 1 is only shown by way of example as an application work with scoop roller 20. However, it should be noted that in principle any suitable type of commissioned work can be used in an application device according to the invention can.
  • the second counter-roller 16 is assigned in an analogous manner Leveling or / and dosing device 22 in the illustrated embodiment shown schematically as a doctor blade.
  • the leveling and / or dosing device could just as easily be a smooth or grooved doctor bar, an air knife, or the like.
  • the surface 14a of the first Counter roll 14 is designed softer according to a first embodiment is as 40 P&J or / and according to a second variant is designed with less friction than the surface 16a of the second counter roll 16 or / and according to a third embodiment variant a predetermined one Has surface roughness. It goes without saying that this Surface properties of either the material of the counter rolls 14 or 16 itself or the material of a surface covering of this Rollers can be provided.
  • the mode of operation of the first embodiment variant is based on a "Spring effect" of the soft surface material of the first counter roll, the at least some compensation for fluctuations in the material web applied tension allows. In the second variant these fluctuations can be caused by slipping of the material web be balanced on the counter roll surface.
  • the mode of action the third embodiment is ultimately based on "floating" the material web on a forming on the roll surface Air layer, with tension fluctuations in the end compensated by slipping of the material web relative to the counter roller can be.
  • the axes of rotation A and B of the two counter-rollers 14, 16 have a distance a which satisfies the following condition: 555 mm ⁇ a ⁇ 0.5 ⁇ ((v Max + v min ) / v Max ) ⁇ (W / D) ⁇ 1500 mm
  • v max is the maximum envisaged running speed of the material web
  • v min is the minimal envisaged running speed of the material web
  • W is the width of the material web 12 in the transverse direction Q
  • D is the diameter of the second counter roller 16.
  • the counter roll diameter goes as a correction factor, since wider machines usually have larger counter rolls exhibit.
  • FIG. 2 shows a further embodiment, which is essentially corresponds to that according to FIG. 1. Analog parts are therefore shown in FIG the same reference numerals as in Fig. 1, but increased by the number 100. Furthermore, the embodiment according to FIG. 2 is only described to this extent than it differs from the embodiment according to FIG. 1, otherwise, reference is expressly made to the description thereof.
  • the application unit 110 according to FIG. 2 differs from the application unit 10 only in that instead of the counter roller 14 a Counter device 114 is provided, which comprises an endless belt 124, which around a pressure shoe 126 and two deflection rollers 128 and 130 revolves in the direction of arrow R.
  • the coating of surface 112a the material web 112 with application medium 121 is again carried out by means of an application unit 118 with scoop roller 120.
  • the scoop roller 120 facing surface of the pressure shoe 126 is formed concave, that between the scoop roller 120 and the pressure shoe 126 there is a longer action gap (nip) than between the scoop roller 20 and the counter roller 14 in the embodiment according to FIG. 1.
  • the length d of the between the counter device 114 and the counter roller 116 not guided section 112b of the material web 112 must be dimensioned such that fluctuations the tensile stress solely through the inherent elasticity of the material web 112 can be compensated.
  • chrome slick is a surface is referred to by etching a chrome surface and embedding of Teflon in the depressions created by the etching. Such surfaces have advantageous non-stick and wear properties.

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  • Coating Apparatus (AREA)
  • Paper (AREA)
EP99108734A 1998-06-17 1999-05-03 Dispositif d'application de materiau fluide ou pâteux sur un bande en mouvement Withdrawn EP0965684A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19827030 1998-06-17
DE19827030A DE19827030A1 (de) 1998-06-17 1998-06-17 Auftragsvorrichtung

Publications (2)

Publication Number Publication Date
EP0965684A2 true EP0965684A2 (fr) 1999-12-22
EP0965684A3 EP0965684A3 (fr) 2000-07-05

Family

ID=7871193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99108734A Withdrawn EP0965684A3 (fr) 1998-06-17 1999-05-03 Dispositif d'application de materiau fluide ou pâteux sur un bande en mouvement

Country Status (4)

Country Link
US (1) US6322627B1 (fr)
EP (1) EP0965684A3 (fr)
JP (1) JP2000024567A (fr)
DE (1) DE19827030A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003026868A1 (fr) * 2001-09-26 2003-04-03 Federal-Mogul Wiesbaden Gmbh & Co. Kg Procede de production de materiaux de palier, ces materiaux de palier et leur utilisation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE463620T1 (de) * 2001-05-23 2010-04-15 Voith Patent Gmbh Auftragsvorrichtung
DE10147302B4 (de) * 2001-09-26 2007-02-22 Federal-Mogul Wiesbaden Gmbh & Co. Kg Verfahren zur Herstellung von Lagermaterialien und Verwendung der Lagermaterialien
JP4863004B2 (ja) * 2006-12-27 2012-01-25 富士ゼロックス株式会社 搬送装置及び画像形成装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982056A (en) * 1974-10-15 1976-09-21 International Paper Company Method for improving the printability characteristics of gloss calendered paper
DE3715307C2 (de) * 1987-05-08 1995-07-20 Voith Gmbh J M Auftragswerk zur Beschichtung laufender Warenbahnen
DE3840610A1 (de) * 1988-12-02 1990-06-07 Jagenberg Ag Vorrichtung zum beidseitigen beschichten von materialbahnen, insbesondere von papierbahnen
US5340611A (en) * 1989-07-25 1994-08-23 J. M. Voith Gmbh Process for coating travelling webs
DE4002256A1 (de) * 1990-01-26 1991-08-01 Voith Gmbh J M Beschichtungsverfahren und auftragseinrichtung zur beschichtung laufender warenbahnen aus papier oder karton
DE4211401A1 (de) * 1992-04-04 1993-10-07 Voith Gmbh J M Beschichtungseinrichtung für Bahnen aus Papier oder Karton
DE4218596C2 (de) * 1992-06-05 1996-05-02 Voith Gmbh J M Streicheinrichtung zum indirekten Auftragen von Streichfarbe auf eine Papier- oder Kartonbahn
FI93665C (fi) * 1992-11-13 1995-05-10 Valmet Paper Machinery Inc Menetelmä ja laitteisto paperirainan päällystämiseksi
FI97817C (fi) * 1993-10-27 1997-02-25 Valmet Paper Machinery Inc Menetelmä ja sovitelma liikkuvan radan päällystämiseksi
DE9421631U1 (de) * 1994-09-28 1996-04-18 Jagenberg Papiertechnik GmbH, 41468 Neuss Vorrichtung zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003026868A1 (fr) * 2001-09-26 2003-04-03 Federal-Mogul Wiesbaden Gmbh & Co. Kg Procede de production de materiaux de palier, ces materiaux de palier et leur utilisation

Also Published As

Publication number Publication date
US6322627B1 (en) 2001-11-27
DE19827030A1 (de) 1999-12-23
EP0965684A3 (fr) 2000-07-05
JP2000024567A (ja) 2000-01-25

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