EP1927476A1 - Chambered doctor blade with at least two compartments containing different fluids - Google Patents

Chambered doctor blade with at least two compartments containing different fluids Download PDF

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Publication number
EP1927476A1
EP1927476A1 EP07291389A EP07291389A EP1927476A1 EP 1927476 A1 EP1927476 A1 EP 1927476A1 EP 07291389 A EP07291389 A EP 07291389A EP 07291389 A EP07291389 A EP 07291389A EP 1927476 A1 EP1927476 A1 EP 1927476A1
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EP
European Patent Office
Prior art keywords
cylinder
vis
housing
partition
chamber
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.)
Ceased
Application number
EP07291389A
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German (de)
French (fr)
Inventor
Hervé Walgenwitz
Gilles Cattacin
Yoann Denis
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.)
Essity Operations France SAS
Original Assignee
Georgia Pacific France SAS
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Filing date
Publication date
Application filed by Georgia Pacific France SAS filed Critical Georgia Pacific France SAS
Publication of EP1927476A1 publication Critical patent/EP1927476A1/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink 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
    • 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
    • B05C1/0813—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 characterised by means for supplying liquid or other fluent material to the roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/18—Inking arrangements or devices for inking selected parts of printing formes

Definitions

  • the present invention relates to a doctor blade chamber for a machine for printing or application of liquid or viscous fluids in which the doctor blade chamber cooperates with a screen cylinder (also called "anilox") which cooperates itself with a complementary cylinder , transferring, printing or applying fluids to a surface.
  • a screen cylinder also called "anilox”
  • the invention is particularly applicable in the field of the application and / or coating of essentially liquid substrates on absorbent products, in particular based on cellulose wadding.
  • Examples of embodiments of multi-compartment doctor blade chambers are known, particularly in the field of printing according to the technique known as "flexography" and in the field of sizing.
  • the presence of the intermediate partition has practically no influence on the deposit on the final product of the two different adjacent fluids contained in the two compartments separated by the partition and in particular so that there is no separation or overlap between the two adjacent coating areas.
  • a doctor blade chamber 10 which is essentially constituted by a housing, 12 which is of generally parallelepipedal rectangle and longitudinal orientation, having a front vertical face open.
  • the housing 12 is delimited by a vertical and longitudinal rear wall 14, as well as by two horizontal and longitudinal upper walls 16 and lower 18 respectively.
  • the doctor blade chamber 10 is able to cooperate sealingly with a complementary cylinder 20 delimited by a outer convex cylindrical surface 22, which is for example a screened cylinder or "anilox".
  • the outer surface of such a cylinder usually has an array of cells for transferring a fluid from one cavity to another cylinder or to the surface to be treated.
  • the axis A of the cylinder 20 is of horizontal orientation.
  • the housing 12 delimits an internal cavity 13 which is able to contain a liquid or viscous fluid, in cooperation with the outer surface 22 of the cylinder 20.
  • the sealing of the housing 20 is ensured by means of two end devices axial sealing 24 each of which comprises in particular a concave sealing surface 26 adapted to cooperate with a portion vis-à-vis the surface 22 of the cylinder 20.
  • the housing 12 is also equipped, in known manner, an upper squeegee 28 and a lower squeegee 30. In practice, only the lower squeegee is necessary.
  • Each squeegee 28, 30, also called doctor blade or doctor blade is, in known manner, made for example of metal or elastically deformable synthetic material.
  • Each doctor blade 28, 30 cooperates with its free end longitudinal edge before sealingly with a longitudinal portion vis-à-vis the surface 22 of the cylinder 20.
  • the housing 12 of the doctor blade chamber 10 comprises a single cavity or internal compartment 13 which is therefore able to contain only one liquid or viscous fluid which is introduced into the housing for example by a supply line 32; the housing 12 is also provided for example with two pipes 34 discharge.
  • the level of the fluid contained in the cavity 13 is provided by any suitable means, and for example by positioning the discharge pipe 34 at the top so that the excess full evacuates permanently by this pipe whose position determines the upper level of the fluid contained in the cavity 13 of the housing 12.
  • the cavity 13 is here divided longitudinally into two separate compartments 13A and 13B by a vertical intermediate sealing partition 40, providing a bi-directional seal function.
  • the intermediate dividing partition 40 is here made in the form of a constant thickness plate, which is for example made by cutting into a plate of suitable material which will be defined further.
  • the peripheral contour of the partition 40 essentially consists of a rear portion 42 whose geometric profile is complementary to the inner profile of the housing 12 and the doctor blades 28 and 30, and a front portion 44 which is able to cooperate sealingly with a convex surface portion 22 of the cylinder 20 facing it.
  • the front portion 44 is thus in the form of a concave cylinder arc of generally vertical orientation whose concave surface 46 is here smooth.
  • the surface 46 is able to cooperate with the convex surface 22 of a cylinder 20, for example anilox cylinder, without any modification of such a standard cylinder.
  • the partition 40 which is here of thickness "e", constant is delimited by two opposite lateral faces of vertical orientation 48A and 48B.
  • the partition 40 is made by cutting into a plate of resiliently deformable cellular material so as to give it both sufficient rigidity and elasticity, in particular for its sealing engagement with the surface 22 of the cylinder 20 and also so as to allow mounting of the plate slightly compressed in its vertical plane, inside the housing 12 of the doctor chamber 10.
  • the intermediate partition 40 is preferably made of a closed-cell polyolefin foam plate.
  • the material constituting the partition, or at least the portion (or leading edge) 46 is for example the reference material XA 1000 ALVEOLUX sold by the company SEKISUI ALVEO.
  • the physical characteristics of this material are as follows: Physical characteristics ISO Unit XA 1000 Density 845 Kg / m 3 100 Tensile strength 1926 kpa 1350 Elongation 1926 % 175 Compressive strength 844 10% compression kpa 125 compression 25% kpa 165 50% compression kpa 275 Resistance to compression 1856-C 22 h load at 23 ° C compression 25% 1 ⁇ 2 h after discharge % 5 24 hours after discharge % 2 Thermal conductivity 2581 at 10 ° C W / mK 0053 at 40 ° C W / mK 0054 Operating temperature Internal ° C -80 / + 80 Water absorption (7 days) Internal Flight.% ⁇ 1.5 Permeability to water vapor 1663 g / m 2 x24h - ⁇ value (23 ° C, 0-85% rh) 1663 -
  • the rear portion 42 of the contour of the partition 40 must perfectly match the inner surface of the housing 12 and the surface portions vis-à-vis the squeegees 28 and 30, as well as the portion before 46 must conform to the portion facing the convex cylinder arc surface 22 of the cylinder 20.
  • the dimensions of the contour 42, 44 of the partition are such that they are oversized (for example by 4%) so that the partition 40 is mounted and cooperates with the cylinder 20, in permanent compression in its vertical plane.
  • the oversizing may be different from the aforementioned value.
  • the axial thickness "e" of the front portion 44, and therefore here of the entire partition 40 is less than 7 mm and is preferably between 3 and 7 mm . A satisfactory seal is possible if the thickness "e" is greater than 3 mm.
  • each compartment 13A, 13B of course includes its own conduits 32A, 34A 32B, 34B supplying the associated compartment and discharging the liquid or viscous fluid that it contains.
  • the intermediate partition 40 is fixed and held longitudinally inside the housing 12 in the cavity 13 by fasteners 50A, 50B which constitute a "clamp" which cooperates with the portions vis-à-vis the opposite side faces 48A and 48B of the partition 40.
  • the teachings of the invention are applicable irrespective of the nature and composition of the fluids, also called substrates, contained in each compartment, whether it be for example a glue, an ink, an a lotion, etc ...
  • the partition 40 can in particular be made by superposition of several layers or plates of suitable materials.
  • a chamber with doctor blades can of course also be equipped with several intermediate partitions, or bi-directional joints, according to the invention in order to delimit a plurality of longitudinally adjacent and longitudinally separated compartments, each compartment being fed and drained by a specific circuit. associated supply and discharge fluid.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

The blade (10) has an intermediate wall i.e. plate (40), with vertical orientation cooperating with a lower surface of a casing (12) and a portion of a convex cylindrical surface (22) of a screened concave cylinder (20) in face to face and sealed manner for longitudinally dividing the casing into two distinct compartments containing liquid fluid. A rear portion cooperates in sealed manner with a portion of lower surface of the casing. An arc shaped front portion of the plate cooperates with a portion of the convex surface of the cylinder in face to face and sealed manner.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

La présente invention concerne une chambre à racles pour une machine d'impression ou d'application de fluides liquides ou visqueux dans laquelle la chambre à racles coopère avec un cylindre tramé (aussi appelé "anilox") qui coopère lui-même avec un cylindre complémentaire, de transfert, d'impression ou d'application des fluides sur une surface.The present invention relates to a doctor blade chamber for a machine for printing or application of liquid or viscous fluids in which the doctor blade chamber cooperates with a screen cylinder (also called "anilox") which cooperates itself with a complementary cylinder , transferring, printing or applying fluids to a surface.

L'invention trouve notamment à s'appliquer dans le domaine de l'application et/ou de l'enduction de substrats essentiellement liquides sur des produits absorbants, notamment à base d'ouate de cellulose.The invention is particularly applicable in the field of the application and / or coating of essentially liquid substrates on absorbent products, in particular based on cellulose wadding.

On connaît de nombreux exemples d'une telle chambre à racles qui coopère avec un cylindre, par exemple de transfert, qui est d'axe longitudinal horizontal, la chambre étant du type comportant :

  • un boîtier, ou cuve, qui s'étend longitudinalement et qui est délimité à chacune de ses deux extrémités longitudinales opposées par un dispositif d'étanchéité qui est apte à coopérer avec une portion de surface convexe du cylindre en vis-à-vis et qui est délimité, au moins le long de son bord longitudinal inférieur, par un racle, ou barre de racle, qui est apte à coopérer avec une portion de surface en vis-à-vis du cylindre en délimitant ainsi une face avant ouverte du boîtier qui est apte à être fermée de manière étanche par la surface convexe du cylindre ;
  • au moins une cloison intermédiaire d'orientation verticale qui coopère de manière étanche avec la face intérieure du boîtier et avec une portion de surface convexe du cylindre en vis-à-vis pour diviser longitudinalement le boîtier en au moins deux compartiments distincts du dont chacun est apte à contenir un fluide.
Numerous examples are known of such a doctor blade chamber which cooperates with a cylinder, for example a transfer cylinder, which has a horizontal longitudinal axis, the chamber being of the type comprising:
  • a housing, or tank, which extends longitudinally and which is delimited at each of its two opposite longitudinal ends by a sealing device which is adapted to cooperate with a convex surface portion of the cylinder opposite and which is delimited, at least along its lower longitudinal edge, by a squeegee, or doctor blade, which is adapted to cooperate with a surface portion vis-à-vis the cylinder thereby delimiting an open front face of the housing which is able to be closed in a sealed manner by the convex surface of the cylinder;
  • at least one vertically oriented intermediate partition which cooperates sealingly with the inner face of the housing and with a convex surface portion of the facing cylinder for longitudinally dividing the housing into at least two separate compartments of which each is able to contain a fluid.

ETAT DE LA TECHNIQUESTATE OF THE ART

On connaît des exemples de réalisation de chambres à racles à compartiments multiples, notamment dans le domaine de l'impression selon la technique dite de "flexographie" et dans le domaine de l'encollage.Examples of embodiments of multi-compartment doctor blade chambers are known, particularly in the field of printing according to the technique known as "flexography" and in the field of sizing.

Les documents EP-A-1.493.552 , US-A-5.012.736 , US-A-5.150.651 , ou encore EP-A-0.293.686 décrivent et représentent des exemples de conception et de réalisation de cloisons intermédiaires qui sont de structures particulièrement complexes et qui ne permettent pas d'obtenir les qualités requises d'enduction ou d'impression et/ou qui nécessitent d'être associées avec un cylindre complémentaire spécifique, notamment pour assurer l'étanchéité dans la zone de coopération de la surface cylindrique convexe externe du cylindre avec la portion concave complémentaire en vis-à-vis de la cloison intermédiaire.The documents EP-A-1493552 , US Patent 5,012,736 , US Patent 5,150,651 , or EP-A-0293686 describe and represent examples of the design and production of intermediate partitions which are particularly complex structures and which do not make it possible to obtain the required qualities of coating or printing and / or which need to be associated with a complementary cylinder specific, in particular to ensure sealing in the cooperation zone of the outer convex cylindrical surface of the cylinder with the complementary concave portion vis-à-vis the intermediate partition.

Parmi les problèmes à résoudre, il est notamment souhaitable que la présence de la cloison intermédiaire n'ait pratiquement aucune influence sur le dépôt sur le produit final des deux fluides différents adjacents contenus dans les deux compartiments séparés par la cloison et notamment de manière qu'il n'y ait pas de séparation ni de recouvrement entre les deux zones d'enduction adjacentes.Among the problems to be solved, it is particularly desirable that the presence of the intermediate partition has practically no influence on the deposit on the final product of the two different adjacent fluids contained in the two compartments separated by the partition and in particular so that there is no separation or overlap between the two adjacent coating areas.

A cet effet, sur le cylindre tramé, on peut tolérer une zone étroite non recouverte, mais en aucun cas un recouvrement.For this purpose, on the screen cylinder, it is possible to tolerate a narrow area not covered, but in no case a covering.

BREF RESUME DE L'INVENTIONBRIEF SUMMARY OF THE INVENTION

Dans ce but, l'invention propose une chambre à racles du type mentionnée précédemment, caractérisée en ce que la cloison intermédiaire est une plaque qui est réalisée en matériau déformable élastiquement et dont le contour comporte :

  • une portion arrière qui coopère de manière étanche avec une portion en vis-à-vis de la face intérieure du boîtier ;
  • et une portion avant en arc de cylindre concave qui est apte à coopérer de manière étanche avec une portion de surface convexe du cylindre tramé en vis-à-vis.
For this purpose, the invention provides a doctor blade chamber of the type mentioned above, characterized in that the intermediate partition is a plate which is made of elastically deformable material and whose contour comprises:
  • a rear portion which cooperates sealingly with a portion vis-à-vis the inner face of the housing;
  • and an arcuate front portion of a concave cylinder which is adapted to cooperate sealingly with a convex surface portion of the screened cylinder vis-à-vis.

Selon d'autres caractéristiques de l'invention :

  • ladite portion avant du contour de la cloison intermédiaire qui est apte à coopérer avec une portion de surface convexe du cylindre tramé en vis-à-vis et avec les racles est réalisée en matériau déformable élastiquement ;
  • toute la plaque est réalisée en matériau alvéolaire déformable élastiquement ;
  • ledit matériau alvéolaire déformable élastiquement est une mousse de polyoléfines à base d'éthylène et d'acétate de vinyle ;
  • la surface concave de ladite portion active du contour de la plaque est lisse ;
  • l'épaisseur selon la direction longitudinale de ladite portion du contour de la plaque est inférieure à 7 mm, et est de préférence comprise entre 3 et 7 mm.
  • la plaque est d'épaisseur constante ou variable entre la face arrière et la face avant concave en contact avec la portion de surface convexe du cylindre tramé en vis-à-vis ;
  • la cloison est montée comprimée élastiquement dans le boîtier ;
  • la chambre comporte des moyens de fixation amovible de la cloison ;
  • lesdits moyens de fixation coopèrent avec des parties en vis-à-vis des faces latérales opposées de la cloison.
According to other features of the invention:
  • said front portion of the contour of the intermediate partition which is adapted to cooperate with a convex surface portion of the screened cylinder vis-à-vis and with the doctor blades is made of elastically deformable material;
  • the entire plate is made of elastically deformable honeycomb material;
  • said elastically deformable cellular material is a polyolefin foam based on ethylene and vinyl acetate;
  • the concave surface of said active portion of the contour of the plate is smooth;
  • the thickness in the longitudinal direction of said portion of the contour of the plate is less than 7 mm, and is preferably between 3 and 7 mm.
  • the plate is of constant thickness or variable between the rear face and the concave front face in contact with the convex surface portion of the screened cylinder vis-à-vis;
  • the partition is mounted resiliently compressed in the housing;
  • the chamber comprises means for removable attachment of the partition;
  • said securing means cooperate with portions facing opposite side faces of the partition.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en section par un plan transversal vertical d'une chambre à racles selon l'état de la technique ;
  • la figure 2 est une vue schématique en section par un plan longitudinal horizontal de la chambre à racles de la figure 1 ;
  • la figure 3 est une vue analogue à celle de la figure 2 qui illustre schématiquement l'agencement d'une cloison intermédiaire selon l'invention ;
  • la figure 4 est une vue schématique en perspective d'un exemple de réalisation selon l'invention de la cloison intermédiaire représentée à la figure 3 ;
  • la figure 5 est une vue de détail en perspective illustrant l'agencement de la cloison intermédiaire de la figure 4 à l'intérieur de la chambre à racles.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 is a schematic sectional view through a vertical transverse plane of a doctor blade chamber according to the state of the art;
  • the figure 2 is a schematic sectional view through a horizontal longitudinal plane of the doctor blade chamber of the figure 1 ;
  • the figure 3 is a view similar to that of the figure 2 which schematically illustrates the arrangement of an intermediate partition according to the invention;
  • the figure 4 is a schematic perspective view of an exemplary embodiment according to the invention of the intermediate partition shown in FIG. figure 3 ;
  • the figure 5 is a detailed perspective view illustrating the arrangement of the intermediate partition of the figure 4 inside the doctor's chamber.

DESCRIPTION DETAILLEE DES FIGURESDETAILED DESCRIPTION OF THE FIGURES

Dans la description détaillée qui va suivre, notamment d'un exemple de réalisation de l'invention, des composants identiques, analogues, ou similaires seront désignés par les mêmes références.In the following detailed description, in particular of an exemplary embodiment of the invention, identical, analogous or similar components will be designated by the same references.

Pour clarifier la description et les revendications, on adoptera à titre non limitatif la terminologie vertical, longitudinal, transversal, supérieur, inférieur, etc ... en référence au trièdre L, V, T indiqué aux figures.To clarify the description and the claims, the vertical, longitudinal, transverse, upper, lower, etc. terminology will be adopted in a nonlimiting manner with reference to the L, V, T trihedron indicated in the figures.

On a représenté aux figures 1 et 2, une chambre à racles 10 qui est essentiellement constituée par un boîtier, 12 qui est de forme générale parallélépipédique rectangle et d'orientation longitudinale, comportant une face verticale avant ouverte.Representatives Figures 1 and 2 , a doctor blade chamber 10 which is essentially constituted by a housing, 12 which is of generally parallelepipedal rectangle and longitudinal orientation, having a front vertical face open.

Le boîtier 12 est délimité par une paroi arrière verticale et longitudinale 14, ainsi que par deux parois horizontales et longitudinales supérieure 16 et inférieure 18 respectivement.The housing 12 is delimited by a vertical and longitudinal rear wall 14, as well as by two horizontal and longitudinal upper walls 16 and lower 18 respectively.

La chambre à racles 10 est apte à coopérer de manière étanche avec un cylindre complémentaire 20 délimité par une surface cylindrique externe convexe 22, qui est par exemple un cylindre tramé ou "anilox".The doctor blade chamber 10 is able to cooperate sealingly with a complementary cylinder 20 delimited by a outer convex cylindrical surface 22, which is for example a screened cylinder or "anilox".

Comme connu dans le domaine technique concerné, la surface extérieure d'un tel cylindre présente habituellement un réseau de cellules destinées à transférer un fluide d'une cavité soit vers un autre cylindre soit vers la surface à traiterAs known in the relevant technical field, the outer surface of such a cylinder usually has an array of cells for transferring a fluid from one cavity to another cylinder or to the surface to be treated.

Par ailleurs, l'axe A du cylindre 20 est d'orientation horizontale.Moreover, the axis A of the cylinder 20 is of horizontal orientation.

Le boîtier 12 délimite une cavité interne 13 qui est apte à contenir un fluide liquide ou visqueux, en coopération avec la surface externe 22 du cylindre 20. De manière connue, l' étanchéité du boîtier 20 est assurée au moyen de deux dispositifs d'extrémités axiales d'étanchéité 24 dont chacun comporte notamment une surface concave d'étanchéité 26 apte à coopérer avec une portion en vis-à-vis de la surface 22 du cylindre 20.The housing 12 delimits an internal cavity 13 which is able to contain a liquid or viscous fluid, in cooperation with the outer surface 22 of the cylinder 20. In known manner, the sealing of the housing 20 is ensured by means of two end devices axial sealing 24 each of which comprises in particular a concave sealing surface 26 adapted to cooperate with a portion vis-à-vis the surface 22 of the cylinder 20.

Le boîtier 12 est aussi équipé, de manière connue, d'un racle supérieur 28 et d'un racle inférieur 30. En pratique, seul le racle inférieur est nécessaire.The housing 12 is also equipped, in known manner, an upper squeegee 28 and a lower squeegee 30. In practice, only the lower squeegee is necessary.

Chaque racle 28, 30, aussi appelé barre de racle ou encore lame de racle est, de manière connue, réalisé par exemple en métal ou en matériau synthétique déformable élastiquement.Each squeegee 28, 30, also called doctor blade or doctor blade is, in known manner, made for example of metal or elastically deformable synthetic material.

Chaque racle 28, 30 coopère par son bord longitudinal d'extrémité libre avant de manière étanche avec une portion longitudinale en vis-à-vis de la surface 22 du cylindre 20.Each doctor blade 28, 30 cooperates with its free end longitudinal edge before sealingly with a longitudinal portion vis-à-vis the surface 22 of the cylinder 20.

Selon le mode de réalisation de l'état de la technique illustré aux figures 1 et 2, le boîtier 12 de la chambre à racles 10 comporte une cavité ou compartiment interne unique 13 qui n'est donc apte à contenir qu'un seul fluide liquide ou visqueux qui est introduit dans le boîtier par exemple par une conduite d'alimentation 32 ; le boîtier 12 étant aussi muni par exemple de deux conduites 34 d'évacuation.According to the embodiment of the state of the art illustrated in Figures 1 and 2 , the housing 12 of the doctor blade chamber 10 comprises a single cavity or internal compartment 13 which is therefore able to contain only one liquid or viscous fluid which is introduced into the housing for example by a supply line 32; the housing 12 is also provided for example with two pipes 34 discharge.

Le niveau du fluide contenu dans la cavité 13 est assuré par tout moyen convenable, et par exemple en positionnant la conduite d'évacuation 34 en partie haute de manière que le trop plein s'évacue en permanence par cette conduite dont la position détermine le niveau supérieur du fluide contenu dans la cavité 13 du boîtier 12.The level of the fluid contained in the cavity 13 is provided by any suitable means, and for example by positioning the discharge pipe 34 at the top so that the excess full evacuates permanently by this pipe whose position determines the upper level of the fluid contained in the cavity 13 of the housing 12.

Comme on peut le voir à la figure 3, et conformément à l'invention, la cavité 13 est ici divisée longitudinalement en deux compartiments distincts 13A et 13B par une cloison intermédiaire verticale d'étanchéité 40, assurant une fonction de joint bidirectionnel d'étanchéité.As can be seen at figure 3 and according to the invention, the cavity 13 is here divided longitudinally into two separate compartments 13A and 13B by a vertical intermediate sealing partition 40, providing a bi-directional seal function.

Dans la description qui va suivre du mode de réalisation selon l'invention, des parties analogues à celles décrites précédemment situées de part et d'autre de la cloison intermédiaire de division 40 seront désignées par les mêmes chiffres de référence indicés A ou B.In the following description of the embodiment according to the invention, parts similar to those previously described located on either side of the intermediate division partition 40 will be designated by the same reference numerals indexed A or B.

Comme on peut le voir aux figures 4 et 5, la cloison intermédiaire de division 40 est ici réalisée sous la forme d'une plaque d'épaisseur constante, qui est par exemple réalisée par découpe dans une plaque de matériau adapté qui sera défini plus avant.As can be seen at Figures 4 and 5 , the intermediate dividing partition 40 is here made in the form of a constant thickness plate, which is for example made by cutting into a plate of suitable material which will be defined further.

Le contour périphérique de la cloison 40 est essentiellement constitué par une portion arrière 42 dont le profil géométrique est complémentaire du profil intérieur du boîtier 12 et des racles 28 et 30, et d'une portion avant 44 qui est apte à coopérer de manière étanche avec une portion de surface convexe 22 du cylindre 20 en vis à vis.The peripheral contour of the partition 40 essentially consists of a rear portion 42 whose geometric profile is complementary to the inner profile of the housing 12 and the doctor blades 28 and 30, and a front portion 44 which is able to cooperate sealingly with a convex surface portion 22 of the cylinder 20 facing it.

La portion avant 44 se présente ainsi sous la forme d'un arc de cylindre concave d'orientation générale verticale dont la surface concave 46 est ici lisse.The front portion 44 is thus in the form of a concave cylinder arc of generally vertical orientation whose concave surface 46 is here smooth.

Grâce à cette conception et au matériau constitutif de la cloison 40, la surface 46 est apte à coopérer avec la surface convexe 22 d'un cylindre 20, par exemple d'un cylindre anilox, sans aucune modification d'un tel cylindre standard.With this design and the material constituting the partition 40, the surface 46 is able to cooperate with the convex surface 22 of a cylinder 20, for example anilox cylinder, without any modification of such a standard cylinder.

La cloison 40, qui est ici d'épaisseur "e", constante est délimitée par deux faces latérales opposées d'orientation verticale 48A et 48B.The partition 40, which is here of thickness "e", constant is delimited by two opposite lateral faces of vertical orientation 48A and 48B.

La cloison 40 est réalisée par découpe dans une plaque de matériau alvéolaire déformable élastiquement de manière à lui conférer à la fois une rigidité et une élasticité suffisantes, notamment pour sa coopération étanche avec la surface 22 du cylindre 20 et aussi de manière à permettre un montage de la plaque légèrement comprimée dans son plan vertical, à l'intérieur du boîtier 12 de la chambre à racles 10.The partition 40 is made by cutting into a plate of resiliently deformable cellular material so as to give it both sufficient rigidity and elasticity, in particular for its sealing engagement with the surface 22 of the cylinder 20 and also so as to allow mounting of the plate slightly compressed in its vertical plane, inside the housing 12 of the doctor chamber 10.

La cloison intermédiaire 40 est réalisée de préférence dans une plaque en mousse de polyoléfines à cellules fermées.The intermediate partition 40 is preferably made of a closed-cell polyolefin foam plate.

Le matériau constitutif de la cloison, ou au moins de la portion (ou bord avant) 46 est par exemple le matériau de référence XA 1000 ALVEOLUX commercialisé par la Société SEKISUI ALVEO.The material constituting the partition, or at least the portion (or leading edge) 46 is for example the reference material XA 1000 ALVEOLUX sold by the company SEKISUI ALVEO.

Les caractéristiques physiques de ce matériau sont les suivantes : Caractéristiques Physiques ISO Unité XA 1000 Densité 845 Kg/m3 100 Résistance à la traction 1926 Kpa 1350 Allongement 1926 % 175 Résistance à la compression 844 compression 10% Kpa 125 compression 25% Kpa 165 compression 50% Kpa 275 Rémanence à la compression 1856-C 22 h charge à 23°C compression 25% ½ h après décharge % 5 24 h après décharge % 2 Conductivité thermique 2581 à 10°C W/mK 0.053 à 40°C W/mK 0.054 Température d'utilisation Interne °C -80/+80 Absorption d'eau (7 jours) Interne Vol.% <1,5 Perméabilité à la vapeur d'eau 1663 g/m2x24h - Valeur µ (23°C, 0-85%r.h.) 1663 - The physical characteristics of this material are as follows: Physical characteristics ISO Unit XA 1000 Density 845 Kg / m 3 100 Tensile strength 1926 kpa 1350 Elongation 1926 % 175 Compressive strength 844 10% compression kpa 125 compression 25% kpa 165 50% compression kpa 275 Resistance to compression 1856-C 22 h load at 23 ° C compression 25% ½ h after discharge % 5 24 hours after discharge % 2 Thermal conductivity 2581 at 10 ° C W / mK 0053 at 40 ° C W / mK 0054 Operating temperature Internal ° C -80 / + 80 Water absorption (7 days) Internal Flight.% <1.5 Permeability to water vapor 1663 g / m 2 x24h - Μ value (23 ° C, 0-85% rh) 1663 -

Pour assurer une étanchéité parfaite des deux compartiments, la portion arrière 42 du contour de la cloison 40 doit épouser parfaitement la surface interne du boîtier 12 et les portions de surfaces en vis-à-vis des racles 28 et 30, de même que la portion avant 46 doit épouser de manière étanche la portion en vis-à-vis de la surface en arc de cylindre convexe 22 du cylindre 20.To ensure perfect sealing of the two compartments, the rear portion 42 of the contour of the partition 40 must perfectly match the inner surface of the housing 12 and the surface portions vis-à-vis the squeegees 28 and 30, as well as the portion before 46 must conform to the portion facing the convex cylinder arc surface 22 of the cylinder 20.

A cet effet, les dimensions du contour 42, 44 de la cloison sont telles qu'elles sont surdimensionnées (par exemple de 4%) afin que la cloison 40 soit montée et coopère avec le cylindre 20, en compression permanente dans son plan vertical. En fonction du matériau choisi pour la cloison intermédiaire, le surdimensionnement pourra être différent de la valeur précitée.For this purpose, the dimensions of the contour 42, 44 of the partition are such that they are oversized (for example by 4%) so that the partition 40 is mounted and cooperates with the cylinder 20, in permanent compression in its vertical plane. Depending on the material chosen for the intermediate partition, the oversizing may be different from the aforementioned value.

Par ailleurs, afin d'assurer une enduction totale sur le produit final, l'épaisseur axiale "e" de la portion avant 44, et donc ici de toute la cloison 40, est inférieure à 7mm et est de préférence comprise entre 3 et 7mm. Une étanchéité satisfaisante est possible si l'épaisseur "e" est supérieure à 3 mm.Moreover, in order to ensure total coating on the final product, the axial thickness "e" of the front portion 44, and therefore here of the entire partition 40, is less than 7 mm and is preferably between 3 and 7 mm . A satisfactory seal is possible if the thickness "e" is greater than 3 mm.

Comme on peut le voir illustré schématiquement à la figure 3, chaque compartiment 13A, 13B comporte bien entendu ses propres conduites 32A, 34A 32B, 34B d'alimentation du compartiment associé et d'évacuation du fluide liquide ou visqueux qu'il contient.As can be seen schematically illustrated in the figure 3 each compartment 13A, 13B of course includes its own conduits 32A, 34A 32B, 34B supplying the associated compartment and discharging the liquid or viscous fluid that it contains.

Afin de permettre un montage et un démontage, notamment en vue de son remplacement, la cloison intermédiaire 40 est fixée et maintenue longitudinalement à l'intérieur du boîtier 12 dans la cavité 13 par des pièces de fixation 50A, 50B qui constituent une "pince" qui coopère avec les portions en vis-à-vis des faces latérales opposées 48A et 48B de la cloison 40.In order to allow assembly and disassembly, in particular with a view to its replacement, the intermediate partition 40 is fixed and held longitudinally inside the housing 12 in the cavity 13 by fasteners 50A, 50B which constitute a "clamp" which cooperates with the portions vis-à-vis the opposite side faces 48A and 48B of the partition 40.

Les enseignements de l'invention trouvent à s'appliquer quelles que soient la nature et la composition des fluides, aussi appelés substrats, contenus dans chaque compartiment, qu'il s'agisse par exemple d'une colle, d'une encre, d'une lotion, etc ...The teachings of the invention are applicable irrespective of the nature and composition of the fluids, also called substrates, contained in each compartment, whether it be for example a glue, an ink, an a lotion, etc ...

L'invention n'est pas limitée au mode de réalisation qui vient d'être décrit.The invention is not limited to the embodiment which has just been described.

La cloison 40 peut notamment être réalisée par superposition de plusieurs couches ou plaques de matériaux adaptés.The partition 40 can in particular be made by superposition of several layers or plates of suitable materials.

Une chambre à racles peut bien entendu aussi être équipée de plusieurs cloisons intermédiaires, ou joints bidirectionnels, selon l'invention afin d'y délimiter une pluralité de compartiments adjacents longitudinalement et séparés de manière étanche, chaque compartiment étant alimenté et vidangé par un circuit spécifique associé d'alimentation et d'évacuation du fluide.A chamber with doctor blades can of course also be equipped with several intermediate partitions, or bi-directional joints, according to the invention in order to delimit a plurality of longitudinally adjacent and longitudinally separated compartments, each compartment being fed and drained by a specific circuit. associated supply and discharge fluid.

Il est possible de modifier une chambre à racles selon l'état de la technique illustré aux figures 1 et 2 pour l'équiper d'une cloison intermédiaire 40 selon l'invention simplement en prévoyant les pièces de fixation permettant la fixation amovible et démontable d'une ou plusieurs cloisons 40, et en y aménageant les orifices et conduites nécessaires pour l'alimentation et la vidange des différents compartiments ainsi formés.It is possible to modify a doctor blade chamber according to the state of the art illustrated in Figures 1 and 2 to equip it with an intermediate partition 40 according to the invention simply by providing the fasteners for removable and removable attachment of one or more partitions 40, and arranging the orifices and conduits necessary for the supply and the emptying of the different compartments thus formed.

Après utilisation pour une impression ou enduction déterminée, il est ainsi possible très aisément de modifier l'agencement longitudinal et le nombre des cloisons intermédiaires, puis de réaménager les circuits correspondants en perçant et/ou en obturant les orifices d'alimentation et d'évacuation dans le boîtier 12.After use for a specific printing or coating, it is thus very easily possible to modify the longitudinal arrangement and the number of intermediate partitions, then to rearrange the corresponding circuits by piercing and / or closing the supply and discharge ports. in the housing 12.

Claims (10)

Chambre à racles (10) pour une machine d'impression ou d'application de fluides liquides ou visqueux dans laquelle la chambre à racles coopère avec un cylindre (20), d'axe (A) longitudinal horizontal, la chambre (10) étant du type comportant: - un boîtier (12) qui s'étend longitudinalement et qui est délimité à chacune de ses deux extrémités longitudinales opposées par un dispositif d'étanchéité (24) qui est apte à coopérer avec une portion de surface convexe (22) du cylindre (20) en vis-à-vis et qui est délimité, au moins le long de son bord longitudinal inférieur, par un racle (30) qui est apte à coopérer avec une portion de surface en vis-à-vis du cylindre en délimitant ainsi une face avant ouverte du boîtier (12) qui est apte à être fermée par la surface convexe (22) du cylindre (20) ; - au moins une cloison intermédiaire (40) d'orientation verticale qui coopère de manière étanche avec la face intérieure du boîtier (12) et avec une portion de surface convexe (22) du cylindre en vis-à-vis pour diviser longitudinalement le boîtier en au moins deux compartiments distincts (13A, 13B) dont chacun est apte à contenir un fluide, ladite la cloison intermédiaire (40) étant une plaque et dont le contour comporte : - une portion arrière (42) qui coopère de manière étanche avec une portion en vis-à-vis de la face intérieure du boîtier (12) ; - et une portion avant (44) en arc de cylindre concave apte à coopérer de manière étanche avec une portion de la surface cylindrique convexe (22) du cylindre (20) en vis-à-vis, caractérisée en ce que ladite portion (44) du contour de la cloison intermédiaire (40) est réalisée en matériau alvéolaire déformable élastiquement. Squeegee chamber (10) for a machine for printing or applying liquid or viscous fluids in which the doctor blade chamber cooperates with a cylinder (20) of horizontal longitudinal axis (A), the chamber (10) being of the type comprising: - a housing (12) which extends longitudinally and which is delimited at each of its two opposite longitudinal ends by a sealing device (24) which is adapted to cooperate with a convex surface portion (22) of the cylinder (20). ) vis-à-vis and which is delimited, at least along its lower longitudinal edge, by a doctor blade (30) which is adapted to cooperate with a surface portion vis-à-vis the cylinder thereby delimiting a open front face of the housing (12) which is adapted to be closed by the convex surface (22) of the cylinder (20); at least one vertically oriented intermediate partition (40) which cooperates sealingly with the inner face of the housing (12) and with a convex surface portion (22) of the facing cylinder for longitudinally dividing the housing in at least two separate compartments (13A, 13B) each of which is adapted to contain a fluid, said intermediate partition (40) being a plate and whose contour comprises: - A rear portion (42) which cooperates sealingly with a portion vis-à-vis the inner face of the housing (12); and a front portion (44) in the form of a concave cylinder arc adapted to cooperate sealingly with a portion of the convex cylindrical surface (22) of the cylinder (20) facing each other, characterized in that said portion (44) ) of the contour of the intermediate partition (40) is made of elastically deformable cellular material. Chambre à racles selon la revendication 1, caractérisée en ce que toute la cloison intermédiaire (40) est réalisée en matériau déformable élastiquement.Chamber with doctor blades according to claim 1, characterized in that the entire intermediate partition (40) is made of elastically deformable material. Chambre à racles selon la revendication précédente, caractérisée en ce que toute la plaque (40) est réalisée en matériau alvéolaire déformable élastiquement.Chamber with doctor blades according to the preceding claim, characterized in that the entire plate (40) is made of elastically deformable cellular material. Chambre à racles selon l'une des revendications 2 ou 3, caractérisée en ce que ledit matériau alvéolaire déformable élastiquement est une mousse de polyoléfines à base d'éthylène et d'acétate de vinyle.Spray chamber according to one of claims 2 or 3, characterized in that said elastically deformable cellular material is a polyolefin foam based on ethylene and vinyl acetate. Chambre à racles selon l'une quelconque des revendications précédentes, caractérisée en ce que la surface concave (46) de ladite portion (44) du contour de la plaque (40) est lisse.Spray chamber according to any one of the preceding claims, characterized in that the concave surface (46) of said portion (44) of the contour of the plate (40) is smooth. Chambre à racles selon l'une quelconque des revendications précédentes, caractérisée ce que l'épaisseur (e) selon la direction longitudinale de ladite portion (44) du contour de la plaque (40) est inférieur à 7 mm et est de préférence comprise entre 3 mm et 7 mm.Spray chamber according to any one of the preceding claims, characterized in that the thickness (e) in the longitudinal direction of said portion (44) of the contour of the plate (40) is less than 7 mm and is preferably between 3 mm and 7 mm. Chambre selon la revendication précédente, caractérisée en ce que la plaque (40) est d'épaisseur (e) constante.Chamber according to the preceding claim, characterized in that the plate (40) is of constant thickness (e). Chambre à racles selon l'une quelconque des revendications précédentes, caractérisée en ce que la cloison (40) est montée comprimée élastiquement dans le boîtier (12).Spray chamber according to any one of the preceding claims, characterized in that the partition (40) is mounted resiliently compressed in the housing (12). Chambre à racles selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte des moyens (50A, 50B) de fixation amovible de la cloison (40).Spray chamber according to any one of the preceding claims, characterized in that it comprises means (50A, 50B) for removably fixing the partition (40). Chambre à racles selon la revendication précédente, caractérisée en ce que lesdits moyens de fixation coopèrent avec des parties en vis-à-vis des faces latérales opposées (48A, 48B) de la cloison (40).Chamber with doctor blades according to the preceding claim, characterized in that said fixing means cooperate with portions facing opposite side faces (48A, 48B) of the partition (40).
EP07291389A 2006-11-27 2007-11-23 Chambered doctor blade with at least two compartments containing different fluids Ceased EP1927476A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0655116A FR2909032B1 (en) 2006-11-27 2006-11-27 RACLE CHAMBER HAS AT LEAST TWO COMPARTMENTS CONTAINING DIFFERENT FLUIDS.

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EP1927476A1 true EP1927476A1 (en) 2008-06-04

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293686A1 (en) 1987-06-03 1988-12-07 Dpu Deutsche Projekt Union Gmbh Method for backfilling underground excavations and device for carrying out such a method
WO1989007047A1 (en) * 1988-02-01 1989-08-10 Tresu A/S Doctor blade chamber device
US5012736A (en) 1987-09-21 1991-05-07 Paper Converting Machine Company Sealing assembly for liquid fountain
US5150651A (en) 1991-06-10 1992-09-29 Flores Carlos R Doctor-blade assembly for flexographic press
GB2263438A (en) * 1992-01-22 1993-07-28 Langston Corp Printing apparatus.
US5662042A (en) * 1996-06-10 1997-09-02 Paper Converting Machine Co. Method of operating ink unit for printing press
FR2792249A1 (en) * 1999-04-19 2000-10-20 Fort James France Printing machine scraper chamber end seal comprises mounting frame with seal element of elastically-deformable cellular material
EP1493552A1 (en) 2003-07-01 2005-01-05 Delicarta SPA Apparatus and method for embossing a sheet material and engraved cylinder used therefore

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293686A1 (en) 1987-06-03 1988-12-07 Dpu Deutsche Projekt Union Gmbh Method for backfilling underground excavations and device for carrying out such a method
US5012736A (en) 1987-09-21 1991-05-07 Paper Converting Machine Company Sealing assembly for liquid fountain
WO1989007047A1 (en) * 1988-02-01 1989-08-10 Tresu A/S Doctor blade chamber device
US5150651A (en) 1991-06-10 1992-09-29 Flores Carlos R Doctor-blade assembly for flexographic press
GB2263438A (en) * 1992-01-22 1993-07-28 Langston Corp Printing apparatus.
US5662042A (en) * 1996-06-10 1997-09-02 Paper Converting Machine Co. Method of operating ink unit for printing press
FR2792249A1 (en) * 1999-04-19 2000-10-20 Fort James France Printing machine scraper chamber end seal comprises mounting frame with seal element of elastically-deformable cellular material
EP1493552A1 (en) 2003-07-01 2005-01-05 Delicarta SPA Apparatus and method for embossing a sheet material and engraved cylinder used therefore

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FR2909032A1 (en) 2008-05-30
FR2909032B1 (en) 2011-04-29

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