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EP0583437B1 - Baguette d'appui pour un dispositif d'application de revetement - Google Patents

Baguette d'appui pour un dispositif d'application de revetement Download PDF

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Publication number
EP0583437B1
EP0583437B1 EP93902160A EP93902160A EP0583437B1 EP 0583437 B1 EP0583437 B1 EP 0583437B1 EP 93902160 A EP93902160 A EP 93902160A EP 93902160 A EP93902160 A EP 93902160A EP 0583437 B1 EP0583437 B1 EP 0583437B1
Authority
EP
European Patent Office
Prior art keywords
doctor blade
adjusting rod
screw
supporting strip
adjusting
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
EP93902160A
Other languages
German (de)
English (en)
Other versions
EP0583437A1 (fr
Inventor
Runald Meyer
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 EP0583437A1 publication Critical patent/EP0583437A1/fr
Application granted granted Critical
Publication of EP0583437B1 publication Critical patent/EP0583437B1/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
    • 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
    • B05C11/041—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 characterised by means for positioning, loading, or deforming the blades
    • B05C11/042—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 characterised by means for positioning, loading, or deforming the blades allowing local positioning, loading or deforming along the 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades

Definitions

  • the invention relates to a support bar for a scraper knife in devices for coating running material webs, in particular paper or cardboard webs, according to the preamble of patent claim 1 and a device for coating a running material web according to the preamble of patent claim 3.
  • devices which have an application unit (roller or nozzle application unit) with which the coating material, for. B. coating color, is applied in excess to the web.
  • a metering system arranged after the applicator with a scraper knife as metering element scrapes the excess off to the desired coat weight, the height of the coat weight being adjustable via the contact pressure of the scraper knife on the counter roller. Below its tip, the scraper knife is supported by an adjacent support bar, which means that the contact pressure can be varied by moving and / or pivoting the clamped scraper knife foot.
  • DE-A-39 27 329 describes a coating device in which piezo translators are used as adjusting elements for the support bar.
  • the piezo translators are mounted so as to be displaceable in the direction of the counter roller in order to set a basic position and, according to one embodiment, act indirectly on the scraper knife via a lever mechanism.
  • the lever mechanism contains a bolt which is arranged parallel to and offset from the piezo translators and which is attached at one end to the support bar.
  • a compression spring is pushed over the other end of the bolt guided by a holder, which is supported on the one hand on the holder and on the other hand is tensioned by an adjusting nut screwed onto the end of the bolt.
  • the spring has the task of pulling the support bar away from the counter roller when the voltage on the piezo translators is reduced, since the piezo translators are unable to apply sufficient tensile forces.
  • the invention has for its object to provide a generic support bar that allows a locally different setting of the contact pressure of the doctor blade, without disturbances in the uniformity of the coating occur at high web speeds due to the forces acting on the doctor blade.
  • the support bar is on the one hand so flexible that a sensitive adjustment of the contact pressure is possible, on the other hand it is stiff enough to absorb the forces acting on the scraper knife without disturbances in the coating weight.
  • Claim 3 contains a coating device with a support bar according to the invention, in which the contact pressure of the scraper knife can be set locally differently and very precisely over the working width.
  • the distance between the individual control points is selected so that the resilience of the support bar lies in an area which ensures both a sensitive adjustment of the contact pressure and sufficient stability.
  • Claim 5 contains a particularly advantageous embodiment of the adjusting elements with which the support bar can be bent locally differently.
  • the adjustment elements enable a play-free adjustment of the support bar without great design effort.
  • the particularly advantageous embodiment according to claim 6 enables a coarse and a fine adjustment, the latter according to the differential screw principle. Another advantage is that a coarse setting without a difference can be used to set a findable reference position, from which the position is then fine-tuned when the difference is switched on.
  • the coating device has a driven counter roller 1, from which the material web 2 - a paper or cardboard web with a width of 8 m and more - is deflected. Excess coating material was applied to the material web 1 by a coating unit (not shown), which is doctored down to the desired coat weight by a metering system with an elastically bendable doctor knife 3 as a metering element.
  • the scraper knife 3 is clamped with its foot in a clamping bar 4 which can be displaced in the direction of the counter roller 1 and is supported on its side facing away from the counter roller 1 below the scraper knife tip by an elastically flexible support bar 5 in the direction towards the counter roller.
  • the contact pressure of the scraper knife 3 against the counter-roller 1 can be adjusted by a relative displacement of the clamping bar 4 to the support bar 5 which extends over the entire web width.
  • the support bar 5 has a uniform cross-section over its entire length - this corresponds to the maximum web width and thus the axial length of the counter-roller 1. Its edge, which lies against the scraper knife 3, is pointed or rounded with a radius between 1 mm and 3 mm, in the example 2 mm.
  • the cross section of the support bar 5 is rectangular and is adapted to a groove 6 of its holder 7 which is open towards the scraper knife 3 and in which the support bar 5 is mounted so as to be movable radially to the counter-roller 1.
  • the height of the support bar 5 measured tangentially to the counter roller 1 is approximately 20 mm, and its radially measured width of the part which is rectangular in cross section is approximately 10 mm.
  • the support bar 5 is preferably made of chromium-nickel steel, alternatively it can e.g. B. made of carbon fiber reinforced plastics and / or coated wear-resistant.
  • the guide in the groove 6 of the holder 7 allows the support bar 5 to bend in a bending plane which extends approximately radially to the counter-roller 1.
  • the area moment of inertia I x measured perpendicular to the bending plane is Support bar 5 between 100 mm 4 and 5000 mm 4 , preferably between 800 mm 4 and 1200 mm 4 ; in the present example it is 1000 mm 4 .
  • the support bar 5 can be bent across the working width to set a desired transverse profile of the coating weight via a locally different contact pressure of the scraper knife 3, holes are made on the back of the entire working width at regular intervals - in the example, every 75 mm - in which the end of an adjusting rod 8 is screwed tight.
  • the adjusting rods 8 are axially freely movable in bores of the base plate 9 of the holder 7, which has a rectangular notch at its end facing the scraper knife 3, which is covered to form the groove 6 by a cover plate 10 screwed onto the base plate 9.
  • a sleeve 11 is drawn over the end of each adjusting rod 8 which extends from the bore of the base plate 9 and is supported on the base plate 9 with a bead-like widening.
  • At least one plate spring 12 is drawn over the sleeve 11, which is supported on one side on the bead and on the other side on an adjusting nut 13 which is screwed onto the end of the adjusting rod 8.
  • the adjusting nut 13 has a bore adapted to the diameter of the sleeve 11 so that it can be moved over the sleeve 11 in order to be able to adjust the pretension of the plate spring 12 by rotation.
  • the plate spring 12 presses the adjusting rod 8 with the preselected preload away from the counter roller 1, thus pulling on the support bar 5 in order to reduce the contact pressure on the scraper knife 3.
  • an adjusting screw 14 with an internal bore with thread and an additional external thread is used, with which it is screwed into a thread of a holder 15, which is fastened to the base plate 9.
  • a further screw 16 is fitted coaxially to the adjusting rod 8 and can be moved in the direction of the counter-roller 1 by rotation against the end of the adjusting rod 8.
  • a washer 17 with a polygonal cross-section - in the example a hexagon - is attached, which is attached centrally her attached ball cap presses against the end of the adjusting rod 8 in order to keep the friction when turning the screw 16 as low as possible.
  • a cover 18 which can be screwed onto the upper side of the holder 15 extends from the latter via the disk 17, the adjusting nut 13 and the plate spring 12 to the cover plate 10 in order to seal the adjusting elements on the upper side.
  • its underside is evenly adapted to the edges of the disk 17 and is in a form-fitting manner on its circumference in order to prevent the disk 17 and thus the screw 16 from turning when the adjusting screw 14 is turned.
  • each adjusting element has its own screw-on cover 18 in order to enable the screw 16 to be rotated for removal by removing a cover 18, as will be described in more detail below.
  • the external thread of the adjustment screw 14 has a smaller pitch than its internal thread, which corresponds to the external thread of the screw 16.
  • the screw 16 is slightly longer than the adjusting screw 14 in which it is mounted. Your outer end face can thus be brought into congruence with the outer end face of the adjusting screw 14 in order to establish a reference point.
  • the adjusting screws 13 on the adjusting rods 18 are rotated into an axial position in which the desired prestressing of the plate springs 12 is present.
  • the outer end faces of the screws 16 are congruent with the outer end faces of the adjusting screws 14.
  • the rough adjustment is now carried out in such a way that, when the covers 18 are unscrewed, the adjusting screws 14 are rotated until a reference position is reached.
  • the washers 17 with the ball caps press the adjusting rods 8 in the direction of the counter-roller 1 against the spring force of the plate springs 12.
  • the screw 16 also rotates with the adjusting screw 14, since the friction on the ball cap of the washer 17 is negligibly small compared to the friction in the common thread with the adjusting screw 14.
  • the covers 18 are placed and screwed on and prevent the screws 16 from now turning.
  • the adjustment screw 14 is rotated further, the associated screw 16 changes its axial position relative to the adjustment screw 14 depending on the pitch of the common thread.
  • the disk 17 only moves with the difference in the thread pitches on the outside and inside on the adjusting screw 14, as a result of which a very fine adjustment of the support bar 5 is possible in the respective areas.
  • the adjustment mechanism of the support bar 5 is free of play, since it is always adjusted with or against the spring force of the tensioned disc springs 12.
  • the reference point selected in the rough setting can be found again simply by turning the adjusting screw 14 until its end face is again congruent with the end face of the screw 16.
  • markings can be made on the end faces of both screws 14, 16, which are made to coincide.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Executing Machine-Instructions (AREA)

Claims (6)

  1. Baguette d'appui pour un grattoir dans des dispositifs d'application de revêtements sur des bandes de matière en défilement, en particulier des bandes de papier ou de carton, qui présente une arête arrondie ou vive à placer contre le grattoir et qui peut être courbée élastiquement pour le réglage d'une pression d'application localement différente sur sa longueur, caractérisée en ce que le moment d'inertie géométrique Ix de la baguette d'appui, mesuré perpendiculairement au plan de courbure, est compris entre 100 mm4 et 5000 mm4, de préférence entre 800 mm4 et 1200 mm4.
  2. Baguette d'appui selon la revendication 1, caractérisée en ce que l'arête placée contre le grattoir présente un rayon de courbure compris entre 1 mm et 3 mm.
  3. Dispositif pour le revêtement d'une bande de matière (2) en défilement, en particulier d'une bande de papier ou de carton, avec un contre-cylindre (1) déviant la bande de matière, avec un grattoir (3) applicable au contre-cylindre (1) et avec une baguette d'appui (5) flexible, placée contre le grattoir (3) en dessous de la pointe de celui-ci, qui supporte le grattoir (3), et avec une rangée d'éléments de réglage disposée sur la largeur de travail, qui agissent sur la baguette d'appui (5) par le côté situé à l'opposé du grattoir (3) pour le réglage d'une pression d'application localement différente du grattoir (3), caractérisé en ce que la baguette d'appui (5) présente les caractéristiques des revendications 1 ou 2.
  4. Dispositif suivant la revendication 3, caractérisé en ce que les éléments de réglage présentent l'un par rapport à l'autre une distance de 50 mm à 200 mm, en particulier de 70 mm à 120 mm.
  5. Dispositif suivant la revendication 3 ou 4, caractérisé par une rangée d'éléments de réglage ayant les caractéristiques suivantes :
    a) une tige de réglage (8) coulissant axialement, fixée au dos de la baguette d'appui (5), qui est guidée à travers un support (7),
    b) sur l'extrémité de la tige de réglage (8) est engagé un ressort de pression (12), qui d'une part prend appui sur le support (7) et peut d'autre part être comprimé par un écrou de réglage (13) vissé sur l'extrémité de la tige de réglage (8),
    c) une vis réglable (16), disposée coaxialement à la tige de réglage (8), qui pousse la tige de réglage (8) en direction du contre-cylindre (1) contre la force du ressort (12).
  6. Dispositif suivant la revendication 5, caractérisé en ce que la vis (16) est vissée dans un filet intérieur d'une autre vis de réglage coaxiale (14), le filet intérieur de la vis de réglage (14) ayant un autre pas que son filet extérieur et la vis intérieure (16) pouvant être empêchée d'accompagner la rotation par un couvercle amovible (18).
EP93902160A 1992-03-11 1993-01-09 Baguette d'appui pour un dispositif d'application de revetement Expired - Lifetime EP0583437B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4207731A DE4207731A1 (de) 1992-03-11 1992-03-11 Abstuetzleiste fuer eine beschichtungsvorrichtung
DE4207731 1992-03-11
PCT/EP1993/000031 WO1993017795A1 (fr) 1992-03-11 1993-01-09 Baguette d'appui pour un dispositif d'application de revetement

Publications (2)

Publication Number Publication Date
EP0583437A1 EP0583437A1 (fr) 1994-02-23
EP0583437B1 true EP0583437B1 (fr) 1997-05-28

Family

ID=6453789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93902160A Expired - Lifetime EP0583437B1 (fr) 1992-03-11 1993-01-09 Baguette d'appui pour un dispositif d'application de revetement

Country Status (8)

Country Link
EP (1) EP0583437B1 (fr)
JP (1) JPH06507576A (fr)
AT (1) ATE153569T1 (fr)
CA (1) CA2102287A1 (fr)
DE (2) DE4207731A1 (fr)
ES (1) ES2105216T3 (fr)
FI (1) FI108524B (fr)
WO (1) WO1993017795A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29716647U1 (de) * 1997-09-17 1997-10-30 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Anpreßleiste

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4334556A1 (de) * 1993-10-11 1995-04-13 Jagenberg Ag Vorrichtung zum Beschichten einer Materialbahn, insbesondere einer Papier- oder Kartonbahn
DE4334555C2 (de) * 1993-10-11 2003-06-26 Jagenberg Papiertech Gmbh Halterung für eine Rakelstange
US5480486A (en) * 1993-12-21 1996-01-02 Beloit Technologies, Inc. Continuous adjustable backing bar for profiling coater blade
US5597415A (en) * 1995-02-09 1997-01-28 Voith Sulzer Paper Technology North America, Inc. Profiling bar for a web coating device
GB2305873B (en) * 1995-10-07 1999-06-02 Crabtree Gateshead Ltd Roll cleaning assembly
DE19734718A1 (de) * 1997-08-11 1999-02-18 Voith Sulzer Papiermasch Gmbh Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn
NL1007246C2 (nl) * 1997-08-26 1999-03-01 Stork Brabant Bv Drukinrichting met kleefstofrakel.
DE19753899A1 (de) * 1997-12-05 1999-06-10 Jagenberg Papiertech Gmbh Pneumatisch betätigbares Stellelement, insbesondere zur Regulierung des Querprofils in einer Beschichtungsvorrichtung für Papier- oder Kartonbahnen
DE19755411A1 (de) 1997-12-12 1999-06-17 Voith Sulzer Papiertech Patent Rakelvorrichtung
DE19812929A1 (de) * 1998-03-24 1999-09-30 Voith Sulzer Papiertech Patent Vorrichtung zum Egalisieren oder/und Dosieren einer auf einen Untergrund aufgebrachten Schicht eines flüssigen oder pastösen Auftragsmediums
DE19827234A1 (de) * 1998-06-18 1999-12-23 Voith Sulzer Papiertech Patent Auftragsvorrichtung, Verwendung eines Stellglieds in einer Auftragsvorrichtung, Stellantriebsvorrichtung, Positions- oder/und Kraftregelung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2825907B2 (de) * 1978-06-13 1981-02-26 Jagenberg-Werke Ag, 4000 Duesseldorf Vorrichtung zum Aufbringen einer Beschichtung auf eine Materialbahn
DE3729621A1 (de) * 1987-09-04 1989-03-16 Jagenberg Ag Vorrichtung zum beschichten einer um eine gegenwalze gefuehrten materialbahn
DE3927329A1 (de) * 1989-08-18 1991-02-21 Jagenberg Ag Vorrichtung zum beschichten einer um eine gegenwalze gefuehrten materialbahn
DE3934986A1 (de) * 1989-10-20 1991-04-25 Jagenberg Ag Vorrichtung zum beschichten einer um eine gegenwalze gefuehrten materialbahn
DE9112595U1 (de) * 1991-06-15 1991-11-28 J.M. Voith Gmbh, 7920 Heidenheim Rakelmesser, insbesondere für Streicheinrichtungen der Papierindustrie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29716647U1 (de) * 1997-09-17 1997-10-30 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Anpreßleiste

Also Published As

Publication number Publication date
CA2102287A1 (fr) 1993-09-12
FI934967A7 (fi) 1993-11-10
ES2105216T3 (es) 1997-10-16
DE59306569D1 (de) 1997-07-03
FI934967A0 (fi) 1993-11-10
WO1993017795A1 (fr) 1993-09-16
DE4207731A1 (de) 1993-09-16
EP0583437A1 (fr) 1994-02-23
FI108524B (fi) 2002-02-15
ATE153569T1 (de) 1997-06-15
JPH06507576A (ja) 1994-09-01

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