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WO2019008295A1 - Main body of doctor blade chamber, doctor blade chamber thereof and methods of manufacturing same - Google Patents

Main body of doctor blade chamber, doctor blade chamber thereof and methods of manufacturing same Download PDF

Info

Publication number
WO2019008295A1
WO2019008295A1 PCT/FR2018/051702 FR2018051702W WO2019008295A1 WO 2019008295 A1 WO2019008295 A1 WO 2019008295A1 FR 2018051702 W FR2018051702 W FR 2018051702W WO 2019008295 A1 WO2019008295 A1 WO 2019008295A1
Authority
WO
WIPO (PCT)
Prior art keywords
main body
doctor blade
water channel
chamber
doctor
Prior art date
Application number
PCT/FR2018/051702
Other languages
French (fr)
Inventor
René Bazin
Philippe Fleury
Julien MATTRAND
Steve Peter Daniel WILLEMS
Original Assignee
Bobst Lyon
Epsilon Composite
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR1756404A external-priority patent/FR3068642A1/en
Application filed by Bobst Lyon, Epsilon Composite filed Critical Bobst Lyon
Priority to JP2020500063A priority Critical patent/JP7084980B2/en
Priority to KR1020207002205A priority patent/KR20200026907A/en
Priority to EP18752560.5A priority patent/EP3648976A1/en
Priority to CN201880045426.5A priority patent/CN110891791B/en
Priority to US16/629,126 priority patent/US11110701B2/en
Publication of WO2019008295A1 publication Critical patent/WO2019008295A1/en

Links

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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die

Definitions

  • the present invention relates to the technical field of doctor's rooms for flexographic rotary printing units and more particularly to the method of manufacturing such a doctor blade chamber and the main body of the doctor blade chamber.
  • Flexography is a rotary printing process that can be used on many supports, for example of the sheet or web type, made of cardboard or plastic material, and requiring the use of plates, or forms of printing, flexible and in relief.
  • a printing unit comprises a forme cylinder, configured to carry the printing form, an anilox roll or cylinder, having on its surface a plurality of cells for collecting ink in a quantity controlled by the cell volume, the screen cylinder being configured to transfer the ink to the plate, a doctor blade chamber, configured to fill the cells of the screened cylinder, a pump, ensuring the delivery of ink from the ink tank to the scraped chamber, and a counterpressure cylinder holding the support being printed against the platen roller.
  • FIG. 1 is illustrated this structure of printer groups schematically.
  • a printing machine comprises several printer groups placed one after the other and each dedicated to a specific color.
  • flexography means a rotary printing method that can be used on many supports and that requires the use of relatively flexible, raised plates or printing forms.
  • a doctor blade chamber is made of metal, preferably aluminum, for manufacturing purposes, the metals can be processed by extrusion.
  • a doctor blade chamber is an element that can reach several meters long and is, by its volume and the material used to make it, heavy and difficult to handle and transport especially during maintenance: cleaning, replacement a room or other.
  • these are often designed in several parts including the main body as described in WO2016192735 Al. Nevertheless, the cost of production increases to the extent that the number of pieces has increased to to achieve this main body and the handling of parts remains difficult, especially since at least a mounting operation is necessary.
  • the bonding and assembly elements come to weigh down the assembled part, which increases the risks associated with non-maintenance and fatigue of the joined joints.
  • the additional assembly / bonding operations reduce productivity in the process of making the doctor chamber.
  • these parts are often made by liquid resin injection molding (RTM), which has the disadvantages of obtaining parts whose thickness of the section is variable and whose fiber compaction is heterogeneous.
  • the object of the invention is to remedy all or some of the aforementioned drawbacks.
  • the invention relates to a main body of doctor blade comprising a first portion configured to maintain a first doctor blade, a second portion configured to maintain a second doctor blade, a third portion connecting the first portion and the second portion, a cavity for receiving ink and delimited at least by the first portion, the second portion and the third portion, characterized in that the main body is a single hollow closed profile extending along a longitudinal main axis XX, the main body being realized made of pultruded composite material.
  • the doctor blade chamber Due to the configuration of the main body the doctor blade chamber according to the invention, the doctor blade chamber is lighter, more robust and resistant due to the use of a pultruded composite material, and the configuration in a single profile avoids the complex assembly operations and time consuming and therefore expensive.
  • the pultrusion makes it possible to obtain stable mechanical properties and a constant and uniform thickness in all points of the section and over the entire length of the profile.
  • the pultrusion allows to have a room, in this case the main body having a porosity of less than 2% and preferably less than 1%.
  • pultrusion means a process for the continuous production of tubes and profiles made of composite materials.
  • the main body has a section of constant thickness. This characteristic is inherent in the pultrusion process used to make the main body.
  • the pultruded composite material comprises thermoplastic fibers and / or aramid fibers and / or glass fibers and / or high modulus carbon fibers and / or high strength carbon fibers.
  • the pultruded composite material is a pultruded composite carbon material.
  • the composite material in which the main body is made comprises a fiber volume strictly greater than 60% of the volume of the composite.
  • the volume of fiber is between 61% and 70% of the volume of the composite.
  • the pultruded composite material has a specific modulus corresponding to a ratio between the longitudinal modulus of elasticity or Young's modulus of the composite and the density of the composite, much greater than the specific modulus of a molded composite material. prepreg, that of a pultruded composite material comprising 60% or less of fibers relative to the volume of the composite, and also that of a low pressure resin injection molded composite material.
  • the pultruded composite material comprises between 61% and 70% of high strength carbon fibers relative to the volume of the composite material. volume of
  • Table 1 Example of specific module results for a composite material with high strength carbon fibers as a function of its volume of fibers in the material and the manufacturing method used.
  • the pultruded composite material comprising more than 60% of fibers has a much greater specific modulus than the specific modulus of a prepreg molded composite material. than that of a pultruded composite material comprising 60% or less of fibers relative to the volume of the composite, and also that of a low pressure resin injection molded composite material.
  • the composite material in which the main body is made by pultrusion with a fiber content strictly greater than 60% has a performance ratio greater than 112% compared to the performance ratio of the same. composite material in low pressure resin injection molding.
  • the main body comprises a nonwoven fabric integrated in the mass of the main body and arranged flush with the outer surface of the main body.
  • the integration of a non-woven fabric on the surface of the main body has the advantage of facilitating the cleaning of the doctor blade chamber to avoid a mixture of an ink with residues of the color of the previously used ink.
  • the nonwoven fabric reduces the surface tension of fluids and develop the qualities of the profile of the main body including machining and delamination.
  • the integration of the textile is performed at the same time as the production of the main body of the doctor chamber.
  • the nonwoven fabric is a veil with a thickness of between 0.05 mm and 1 mm.
  • the nonwoven fabric at least partially covers a portion of the surface of the main body.
  • the nonwoven fabric covers at least the surface of the first portion and / or the second portion and / or the third portion of the main body. Even more preferentially, the nonwoven fabric covers the entire surface of the main body.
  • the nonwoven fabric is a textile comprising at least fibers, for example organic, inorganic or thermoplastic fibers.
  • the doctor blade chamber comprises at least one pressurized water channel, arranged in the main body.
  • the purpose of the water channel is to wash the doctor chamber and remove residual inks.
  • the water channel extends over at least a part of the length of the main body, preferably over the entire length of the main body.
  • the water channel is housed in the hollow of the main body at the third portion.
  • the water channel comprises at least one washing nozzle opening into the cavity of the main body and projecting from the water channel through the third portion of the main body.
  • the water channel comprises a plurality of washing nozzles.
  • the plurality of wash nozzles are evenly spaced all along the water channel.
  • the third portion is set back relative to the first portion and to the second portion of the main body, so that between the first portion and the second portion a cavity is formed.
  • the washing nozzles open into the cavity formed by the first, second and third portions of the main body.
  • the first scrape and the second scrape partially close the cavity formed by the first, second and third portions of the main body.
  • the first squeegee and the second squeegee have the function of scraping the screen cylinder intended to come partially in the chamber with squeegees.
  • the main body comprises a first face intended to face the screened cylinder, and a second face opposite to the first face.
  • the water channel is positioned in a hollow of the profile of the main body, a first side of the water channel being arranged against a first inner face of the main body and a second side of the channel of water, opposite the first side of the water channel being arranged against a second inner face of the main body.
  • the water channel is bonded to the main body.
  • the water channel is bonded with an expansive adhesive for sealing.
  • the glue used to glue the water channel is for example a thermosetting glue.
  • the water channel is made of a composite material comprising, for example, carbon. According to one characteristic of the invention, the water channel is a profile.
  • the water channel is of substantially rectangular cross section.
  • the doctor blade chamber further comprises an ink channel, extending at least partially along the main body, preferably all along the main body.
  • the function of the ink channel is to ink the printing unit by flexography.
  • the ink channel is arranged in the hollow of the profile of the main body, and has at least one ink outlet opening into the ink channel and projecting from the ink channel through the third channel. portion of the main body.
  • the ink channel is made of a composite material comprising for example carbon.
  • the ink channel is a profile.
  • the ink channel is of substantially circular cross section.
  • the doctor blade chamber comprises a first end piece and a second end piece, each end piece being arranged at one end of the main body of the doctor blade chamber.
  • a portion of the first end piece is inserted into a first end of the profile of the main body.
  • a portion of the second end piece is inserted into a second end of the profile of the main body.
  • each end piece is inserted and then glued into the main body.
  • the first end piece has at least one orifice shaped to house a pipe connecting the water channel to a water tank.
  • the first end piece has a second orifice shaped to house a pipe connecting the ink channel to an ink tank.
  • the invention also relates to a method for manufacturing a main body of doctor blade chambers, the manufacturing method being characterized in that it comprises at least one pultrusion step of a main body according to the invention.
  • the invention also relates to a method of manufacturing a doctor blade chamber according to the invention, the manufacturing method comprising at least one step of obtaining a main body according to the invention by pultrusion.
  • the manufacturing method comprises at least one additional step of insertion and assembly, preferably by gluing a shaped water channel to form a water network in the main body of the chamber with squeegees.
  • the water channel is assembled preferably bonded in the cavity of the profile of the main body and particularly against the first face and the second face of the profile of the main body.
  • the adhesive used to glue the water channel is an expandable adhesive for sealing the assembly.
  • the manufacturing method comprises a step of drilling at least one orifice in the main body and in the water channel, the drilling step for the subsequent positioning of washing nozzles.
  • the manufacturing method further comprises a step of inserting an ink channel within the doctor chamber.
  • the manufacturing method comprises a step of insertion and assembly, preferably by gluing, of a first end piece at one end of the main body of the doctor chamber and a second end piece at the other end of the main body, while connecting the first end piece to the water channel and the ink channel.
  • FIG. 1 is a schematic illustration of a flexographic printing unit comprising a conventional doctor blade chamber
  • FIG. 2 is a perspective view of the doctor chamber according to the invention
  • FIG. 3 is a perspective view of the main body of the doctor chamber according to the invention and as illustrated in FIG. 2,
  • FIG. 4 is a partial perspective view of the doctor chamber according to the invention and as illustrated in FIGS. 2 and 3,
  • FIG. 5 is a detail view according to box A of FIG. 4,
  • FIG. 6 is a partial detail view of the doctor chamber according to the invention and as illustrated in FIGS. 2 to 5,
  • FIG. 7 is a side view of the main body of the doctor chamber according to the invention. DETAILED DESCRIPTION OF THE FIGURES
  • a printing unit 100 comprises:
  • a forme cylinder 104 configured to support a photograph or printing form 108
  • an anilox roll or cylinder 103 having on its surface a plurality of cells for collecting ink in an amount controlled by the volume of the cells, the screened cylinder 103 being configured to transfer the ink to the plate 10x,
  • a chamber with doctor blades 101 configured to fill the cells of the screened cylinder 103,
  • a pump 102 for conveying ink from the ink tank 107 to the doctor chamber 101, and
  • a counter-pressure cylinder 105 holding the support being printed 106 against the forme cylinder 104, and thus against the plate 108.
  • the doctor blade chamber of the invention is designated by numeral 1 and is illustrated in detail with reference to FIGS. 2-7.
  • the doctor blade chamber 1 comprises a main body 2 made in one piece which is a closed hollow profile, as illustrated in particular in FIG. 3.
  • the main body 2 has a constant and uniform thickness in all points of the section and over the entire length of the profile, as illustrated in particular in Figures 3, 6 and 7.
  • the main body 2 extends along a longitudinal main axis XX as illustrated in particular in Figures 2 and 3.
  • the main body 2 is made of pultruded composite carbon.
  • the main body 2 has a first portion 2a, a second portion 2b and a third portion 2c.
  • the third portion is a first portion 2a, a second portion 2b and a third portion 2c.
  • the third portion 2c connects the first portion 2a and the second portion 2b, the third portion 2c being shaped and intended to partially receive a screened cylinder within it.
  • the third portion 2c is set back relative to the first portion 2a and to the second portion 2b of the main body 2, so that between the first portion and the second portion a cavity 2e is formed.
  • the main body 2 has a first face 2.1 intended to be facing the screen cylinder and a second face 2.2 opposite to the first face
  • the doctor blade chamber 1 further comprises a first doctor blade 3, the first doctor blade 3 being mounted on the first portion 2a of the main body 2 by means of a first doctor blade flange 5 as shown in FIGS. 2 and 7.
  • Each flange is held by a fastening system 7 consisting of the cooperation of a screw or a pin, visible in FIG. 2 with an insert 7a and visible in Figures 4 and 7 for example.
  • the doctor blade chamber 1 comprises a second doctor blade 4, the second doctor blade 4 being mounted on the second portion 2b of the main body 2, facing the first doctor blade 3, by means of a second doctor blade flange 6 as shown.
  • the first doctor blade 3 and the second doctor blade 4 partly close the cavity 2e formed by the first 2a, second 2b and third 2c portions of the main body 2.
  • the main body 2 comprises a nonwoven fabric 16 arranged on the surface of the main body 2 as shown in solid line in FIG. 7.
  • the nonwoven fabric 16 is represented as covering the entire surface of the main body 2 but, in variants not shown, the nonwoven fabric could cover only part of the main body 2 for example only the first face 2.1 or only the second face 2.2 or only one of the portions 2a, 2b, 2c of the main body 2.
  • the scraper chamber 1 comprises a water channel 11 under pressure, arranged in the main body 2 and more precisely in the hollow 2d of the profile of the main body 2 at the level of the third portion 2c.
  • the water channel 11 advantageously extends over the entire length of the main body 2.
  • the water channel 11 is a profile of substantially rectangular cross section.
  • a first side 2.3 of the water channel 11 is arranged against the first internal face 2.1 of the main body 2 and a second side 2.4 of the water channel 11, opposite the first side of the channel of water 11 is arranged against the second internal face 2.2 of the main body 2.
  • the water channel 11 comprises at least a plurality of washing nozzles 10 opening into the water channel 11 and projecting from the water channel 11 through the third portion 2c of the body main 2 as illustrated in Figures 2 and 7.
  • the water channel 11 is bonded in the main body 2 by means of an expansive adhesive 17 for sealing.
  • the plurality of washing nozzles 10 are evenly spaced along the water channel 11.
  • the washing nozzles 10 open into the cavity 2e formed by the first, second and third portions 2a, 2b, 2c of the main body 2.
  • the doctor chamber 1 according to the invention comprises an ink channel 12, extending all along the main body 2 and arranged in the hollow 2d of the profile of the main body 2.
  • the ink channel 12 comprises at least one ink outlet 13 shown in FIG. 6 opening into the ink channel 12 and protruding from the ink channel 12 through the third portion 2c of the main body 2.
  • the channel ink 12 is a substantially circular cross-sectional profile.
  • the doctor blade chamber comprises a first end piece 8a and a second end piece 8b, each end piece 8a, 8b being arranged at one end of the main body 2 of the doctor blade chamber 1.
  • a portion of the first end piece 8a is inserted into a first end of the profile of the main body 2 and a portion of the second end piece 8b is inserted into a second end on main body profile 2.
  • the first end piece 8a has at least one orifice shaped to house a pipe 9a connecting the water channel 11 to a water tank and a second hole shaped to house a pipe 9b connecting the ink channel 12 to an ink tank as shown in Figures 7 and 2.
  • the blade chamber 1 comprises a support 14 illustrated in Figures 2 to 5 and 7 arranged on the second face 2.2 of the main body 2 and configured to strengthen the doctor blade chamber 1.
  • the doctor blade chamber 1 comprises a hook 15 intended to allow attachment of the doctor chamber system 1.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)

Abstract

The invention relates to a main body (2) of doctor blade chambers (1) comprising a first portion (2a) configured to hold a first doctor blade (3), a second portion (2b) configured to hold a second doctor blade (4), a third portion (2c) connecting the first portion (2a) and the second portion (2b), a cavity (2e) intended to receive ink and defined at least by the first portion (2a), the second portion (2b) and the third portion (2c), characterised in that the main body (2) is a single closed hollow profile extending along a longitudinal main axis X-X, the main body (2) being made of pultruded composite material.

Description

Corps principal de chambre à racles, chambre à racles associée  Scraper chamber main body, associated scraper chamber
et procédés de fabrication associés.  and associated manufacturing methods.
DOMAINE TECHNIQUE DE L'INVENTION  TECHNICAL FIELD OF THE INVENTION
La présente invention concerne le domaine technique des chambres à racles pour des groupes imprimeurs rotatifs par flexographie et plus particulièrement du procédé de fabrication d'une telle chambre à racles et du corps principal de la chambre à racle.  The present invention relates to the technical field of doctor's rooms for flexographic rotary printing units and more particularly to the method of manufacturing such a doctor blade chamber and the main body of the doctor blade chamber.
La flexographie est un procédé d'impression rotatif utilisable sur de nombreux supports, par exemple de type feuille ou web, en carton ou matériau plastique, et nécessitant l'utilisation de clichés, ou formes d'impression, souples et en relief.  Flexography is a rotary printing process that can be used on many supports, for example of the sheet or web type, made of cardboard or plastic material, and requiring the use of plates, or forms of printing, flexible and in relief.
En flexographie, un groupe imprimeur comprend un cylindre porte- cliché, configuré pour porter la forme d'impression, un cylindre tramé ou cylindre anilox, présentant sur sa surface une pluralité d'alvéoles destinées à recueillir de l'encre en quantité contrôlée par le volume des alvéoles, le cylindre tramé étant configuré pour transférer l'encre sur le cliché, une chambre à racles, configurée pour remplir les alvéoles du cylindre tramé, une pompe, assurant l'acheminement de l'encre du réservoir d'encre vers la chambre à racles, et un cylindre de contre-pression maintenant le support en cours d'impression contre le cylindre porte-cliché.  In flexography, a printing unit comprises a forme cylinder, configured to carry the printing form, an anilox roll or cylinder, having on its surface a plurality of cells for collecting ink in a quantity controlled by the cell volume, the screen cylinder being configured to transfer the ink to the plate, a doctor blade chamber, configured to fill the cells of the screened cylinder, a pump, ensuring the delivery of ink from the ink tank to the scraped chamber, and a counterpressure cylinder holding the support being printed against the platen roller.
En figure 1 est illustrée cette structure de groupes imprimeurs de manière schématique. Une machine d'impression comprend plusieurs groupes imprimeurs placés les uns à la suite des autres et dédiés chacun à une couleur spécifique.  In Figure 1 is illustrated this structure of printer groups schematically. A printing machine comprises several printer groups placed one after the other and each dedicated to a specific color.
Dans la présente invention, on entend par flexographie, un procédé d'impression rotatif utilisable sur de nombreux supports et nécessitant l'utilisation de clichés, ou formes d'impression, relativement souples et en relief.  In the present invention, the term flexography means a rotary printing method that can be used on many supports and that requires the use of relatively flexible, raised plates or printing forms.
ETAT DE LA TECHNIQUE STATE OF THE ART
Classiquement, une chambre à racles est réalisée en métal, préférentiellement en aluminium, pour des questions de fabrication, les métaux pouvant être transformés par extrusion.  Conventionally, a doctor blade chamber is made of metal, preferably aluminum, for manufacturing purposes, the metals can be processed by extrusion.
Cependant, une chambre à racles est un élément qui peut atteindre plusieurs mètres de long et qui est, de par son volume et le matériau utilisé pour le réaliser, lourd et difficile à manipuler et à transporter notamment lors de la maintenance : nettoyage, remplacement d'une pièce ou autre. Pour faciliter la conception et alléger la chambre à racles, ces dernières sont souvent conçues en plusieurs pièces notamment le corps principal comme décrit dans le document WO2016192735 Al. Néanmoins, le coût de production augmente dans la mesure où le nom bre de pièces a ugmente pour réa liser ce corps principa l et la manipulation des pièces reste difficile, d'autant plus qu'au moins une opération de montage est nécessaire. En outre, les éléments de collage et d'assemblage viennent alourdir la pièce assemblée, ce qui augmente les risques liés la non-tenue et à la fatigue des jonctions assem blées. De plus, les opérations supplémentaires d'assemblage/collage baissent la productivité da ns le processus de réalisation de la chambre à racles. Par ailleurs, ces pièces sont souvent réalisées en moulage par injection de résine liquide (RTM), ce qui présente les inconvénients d'obtenir des pièces dont l'épaisseur de la section est variable et dont le compactage des fibres est hétérogène. OBJET DE L'INVENTION However, a doctor blade chamber is an element that can reach several meters long and is, by its volume and the material used to make it, heavy and difficult to handle and transport especially during maintenance: cleaning, replacement a room or other. To facilitate the design and lighten the chamber scrapers, these are often designed in several parts including the main body as described in WO2016192735 Al. Nevertheless, the cost of production increases to the extent that the number of pieces has increased to to achieve this main body and the handling of parts remains difficult, especially since at least a mounting operation is necessary. In addition, the bonding and assembly elements come to weigh down the assembled part, which increases the risks associated with non-maintenance and fatigue of the joined joints. In addition, the additional assembly / bonding operations reduce productivity in the process of making the doctor chamber. Furthermore, these parts are often made by liquid resin injection molding (RTM), which has the disadvantages of obtaining parts whose thickness of the section is variable and whose fiber compaction is heterogeneous. OBJECT OF THE INVENTION
L'invention a pour but de remédier à tout ou partie des inconvénients précités.  The object of the invention is to remedy all or some of the aforementioned drawbacks.
L'invention a pour objet un corps principal de chambres à racles comprenant une première portion configurée pour maintenir une première racle, une deuxième portion configurée pour maintenir une deuxième racle, une troisième portion reliant la première portion et la deuxième portion, une cavité destinée à recevoir de l'encre et délimitée au moins par la première portion, la deuxième portion et la troisième portion, caractérisé en ce que le corps principal est un unique profilé fermé creux s'étendant selon un axe principal longitudinal X-X, le corps principal étant réalisé en matériau composite pultrudé.  The invention relates to a main body of doctor blade comprising a first portion configured to maintain a first doctor blade, a second portion configured to maintain a second doctor blade, a third portion connecting the first portion and the second portion, a cavity for receiving ink and delimited at least by the first portion, the second portion and the third portion, characterized in that the main body is a single hollow closed profile extending along a longitudinal main axis XX, the main body being realized made of pultruded composite material.
Grâce à la configuration du corps principal la chambre à racles selon l'invention, la chambre à racles est plus légère, plus robuste et résistante du fait de l'utilisation d'un matériau composite pultrudé, et la configuration en un seul profilé évite les opérations de montage/assemblage complexes et chronophages et donc coûteuses. En outre, la pultrusion permet d'obtenir des propriétés mécaniques stables et une épaisseur constante et uniforme en tous points de la section et sur toute la longueur du profilé. De plus, la pultrusion permet d'avoir une pièce, en l'espèce le corps principal présentant un taux de porosité inférieur à 2% et préférentiellement inférieur à 1%.  Due to the configuration of the main body the doctor blade chamber according to the invention, the doctor blade chamber is lighter, more robust and resistant due to the use of a pultruded composite material, and the configuration in a single profile avoids the complex assembly operations and time consuming and therefore expensive. In addition, the pultrusion makes it possible to obtain stable mechanical properties and a constant and uniform thickness in all points of the section and over the entire length of the profile. In addition, the pultrusion allows to have a room, in this case the main body having a porosity of less than 2% and preferably less than 1%.
Dans la présente invention on entend par pultrusion, un procédé de fabrication en continu de tubes et profilés en matériaux composites. Selon une forme de réalisation de l'invention, le corps principal présente une section d'épaisseur constante. Cette caractéristique est inhérente au procédé de pultrusion utilisé pour réaliser le corps principal. In the present invention, pultrusion means a process for the continuous production of tubes and profiles made of composite materials. According to one embodiment of the invention, the main body has a section of constant thickness. This characteristic is inherent in the pultrusion process used to make the main body.
Selon une caractéristique de l'invention, le matériau composite pultrudé comprend des fibres thermoplastiques et/ou des fibres d'aramide et/ou des fibres de verre et/ou des fibres de carbone haut module et/ou des fibres de carbone haute résistance. Préférentiellement, le matériau composite pultrudé est un matériau carbone composite pultrudé.  According to one characteristic of the invention, the pultruded composite material comprises thermoplastic fibers and / or aramid fibers and / or glass fibers and / or high modulus carbon fibers and / or high strength carbon fibers. Preferably, the pultruded composite material is a pultruded composite carbon material.
Selon une caractéristique de l'invention, le matériau composite dans lequel est réalisé le corps principal comprend un volume de fibre strictement supérieur à 60% du volume du composite. Préférentiellement, le volume de fibre est compris entre 61% et 70% du volume du composite.  According to one characteristic of the invention, the composite material in which the main body is made comprises a fiber volume strictly greater than 60% of the volume of the composite. Preferably, the volume of fiber is between 61% and 70% of the volume of the composite.
Grâce à cette composition, le matériau composite pultrudé présente un module spécifique correspondant à un ratio entre le module d'élasticité longitudinal ou module d'Young du composite et la densité du composite, bien plus important que le module spécifique d'un matériau composite moulé pré-imprégné, que celui d'un matériau composite pultrudé comprenant 60% ou moins de fibres par rapport au volume du composite, et également que celui d'un matériau composite moulé par injection basse pression de résine.  With this composition, the pultruded composite material has a specific modulus corresponding to a ratio between the longitudinal modulus of elasticity or Young's modulus of the composite and the density of the composite, much greater than the specific modulus of a molded composite material. prepreg, that of a pultruded composite material comprising 60% or less of fibers relative to the volume of the composite, and also that of a low pressure resin injection molded composite material.
Préférentiellement, le matériau composite pultrudé comprend entre 61% et 70% de fibres de carbone haute résistance par rapport au volume du matériau composite. volume de  Preferably, the pultruded composite material comprises between 61% and 70% of high strength carbon fibers relative to the volume of the composite material. volume of
Module  Module
fibre dans le densité Module de Young ratio de fiber in the density Young's modulus ratio
Procédés utilisés spécifique Specific processes used
composite (Kg/m3) (KN/m2) performance*  composite (Kg / m3) (KN / m2) performance *
KNm/Kg  KNm / Kg
(%)  (%)
Moulage par injection  Injection molding
basse pression de 50 1524 120 000 000 78740 100% résine  Low pressure of 50 1524 120 000 000 78740 100% resin
Moulage de pré83440  Molding of pre83440
56 1558 130 000 000 106% imprégné  56 1558 130 000 000 106% impregnated
Pultrusion ≤60% 1581 140 000 000 88552 112% Pultrusion ≤60% 1581 140,000,000 88552 112%
Pultrusion 65 1605 149 000 000 92835 117%Pultrusion 65 1605 149 000 000 92835 117%
Pultrusion ≥70% 1632 160 000 000 98039 124% * par rapport au moulage par injection basse pression de résine Pultrusion ≥70% 1632 160,000,000 98039 124% * compared to low pressure resin injection molding
Tableau 1 : exemple de résultats de module spécifique pour un matériau composite avec des fibres de carbone haute résistance en fonction de son volume de fibres dans le matériau et du procédé de fabrication utilisé. Table 1: Example of specific module results for a composite material with high strength carbon fibers as a function of its volume of fibers in the material and the manufacturing method used.
Figure imgf000006_0001
Figure imgf000006_0001
*par rapport au moulage par injection basse pression de résine d'un matériau composite comprenant 50% de fibres carbone haute résistance  * Compared with low-pressure resin injection molding of a composite material comprising 50% high strength carbon fibers
Tableau 2 : exemple de résultats de module spécifique pour différents matériaux utilisés. Table 2: Example of specific module results for different materials used.
Comme on peut le voir dans l'exemple illustré au Tableau 1 ci-dessus, le matériau composite pultrudé comprenant plus de 60% de fibres, présente un module spécifique bien plus important que le module spécifique d'un matériau composite moulé pré-imprégné, que celui d'un matériau composite pultrudé comprenant 60% ou moins de fibres par rapport au volume du composite, et également que celui d'un matériau composite moulé par injection basse pression de résine. As can be seen in the example illustrated in Table 1 above, the pultruded composite material comprising more than 60% of fibers has a much greater specific modulus than the specific modulus of a prepreg molded composite material. than that of a pultruded composite material comprising 60% or less of fibers relative to the volume of the composite, and also that of a low pressure resin injection molded composite material.
Selon une caractéristique de l'invention, le matériau composite dans lequel le corps principal est réalisé par pultrusion avec un taux de fibre strictement supérieur à 60%, présente un ratio de performance supérieur à 112% par rapport au ratio de performance d'un même matériau composite en moulage par injection basse pression de résine. Selon une caractéristique de l'invention, le corps principal comprend un textile non-tissé intégré dans la masse du corps principal et agencé affleurant à la surface extérieure du corps principal. L'intégration d'un textile non-tissé en surface du corps principal présente l'avantage de faciliter le nettoyage de la chambre à racles afin d'éviter un mélange d'une encre avec des résidus de la couleur de l'encre précédemment utilisée. En outre, le textile non-tissé permet de réduire la tension de surface des fluides et de développer les qualités du profilé du corps principal notamment en usinage et en délaminage. According to one characteristic of the invention, the composite material in which the main body is made by pultrusion with a fiber content strictly greater than 60%, has a performance ratio greater than 112% compared to the performance ratio of the same. composite material in low pressure resin injection molding. According to a feature of the invention, the main body comprises a nonwoven fabric integrated in the mass of the main body and arranged flush with the outer surface of the main body. The integration of a non-woven fabric on the surface of the main body has the advantage of facilitating the cleaning of the doctor blade chamber to avoid a mixture of an ink with residues of the color of the previously used ink. . In addition, the nonwoven fabric reduces the surface tension of fluids and develop the qualities of the profile of the main body including machining and delamination.
Avantageusement, l'intégration du textile est réalisée en même temps que la réalisation du corps principal de la chambre à racles.  Advantageously, the integration of the textile is performed at the same time as the production of the main body of the doctor chamber.
Selon une caractéristique de l'invention, le textile non-tissé est un voile d'une épaisseur comprise entre 0,05mm et 1mm.  According to one characteristic of the invention, the nonwoven fabric is a veil with a thickness of between 0.05 mm and 1 mm.
Selon une caractéristique de l'invention, le textile non-tissé couvre au moins partiellement une partie de la surface du corps principal. Préférentiellement, le textile non-tissé couvre au moins la surface de la première portion et/ou la deuxième portion et/ou la troisième portion du corps principal. Encore plus préférentiellement, le textile non-tissé couvre toute la surface du corps principal.  According to a feature of the invention, the nonwoven fabric at least partially covers a portion of the surface of the main body. Preferably, the nonwoven fabric covers at least the surface of the first portion and / or the second portion and / or the third portion of the main body. Even more preferentially, the nonwoven fabric covers the entire surface of the main body.
Selon une caractéristique de l'invention, le textile non-tissé est un textile comprenant au moins des fibres par exemples organiques, inorganiques, thermoplastiques.  According to one characteristic of the invention, the nonwoven fabric is a textile comprising at least fibers, for example organic, inorganic or thermoplastic fibers.
Selon une caractéristique de l'invention, la chambre à racles comprend au moins un canal d'eau sous pression, agencé dans le corps principal. Le canal d'eau a pour fonction de servir au lavage de la chambre à racles et d'éliminer les encres résiduelles.  According to one characteristic of the invention, the doctor blade chamber comprises at least one pressurized water channel, arranged in the main body. The purpose of the water channel is to wash the doctor chamber and remove residual inks.
Selon une caractéristique de l'invention, le canal d'eau s'étend sur au moins une partie de la longueur du corps principal, préférentiellement sur toute la longueur du corps principal. Le canal d'eau est logé dans le creux du corps principal au niveau de la troisième portion.  According to one characteristic of the invention, the water channel extends over at least a part of the length of the main body, preferably over the entire length of the main body. The water channel is housed in the hollow of the main body at the third portion.
Selon une caractéristique de l'invention, le canal d'eau comprend au moins une buse de lavage débouchant dans la cavité du corps principal et s'étendant en saillie depuis le canal d'eau à travers la troisième portion du corps principal.  According to one characteristic of the invention, the water channel comprises at least one washing nozzle opening into the cavity of the main body and projecting from the water channel through the third portion of the main body.
Préférentiellement, le canal d'eau comprend une pluralité de buses de lavage. Avantageusement, les buses de lavage de la pluralité sont espacées régulièrement tout le long du canal d'eau. Selon une caractéristique de l'invention, la troisième portion est en retrait par rapport à la première portion et à la deuxième portion du corps principal, de sorte qu'entre la première portion et la deuxième portion une cavité est formée. Preferably, the water channel comprises a plurality of washing nozzles. Advantageously, the plurality of wash nozzles are evenly spaced all along the water channel. According to one characteristic of the invention, the third portion is set back relative to the first portion and to the second portion of the main body, so that between the first portion and the second portion a cavity is formed.
Selon une caractéristique de l'invention, les buses de lavage débouchent dans la cavité formée par les première, deuxième et troisième portions du corps principal.  According to one characteristic of the invention, the washing nozzles open into the cavity formed by the first, second and third portions of the main body.
Selon une caractéristique de l'invention, la première racle et la deuxième racle ferment partiellement la cavité formée par les première, deuxième et troisième portions du corps principal. La première racle et la deuxième racle ont pour fonction de racler le cylindre tramé destiné à venir partiellement dans la chambre à racles.  According to one characteristic of the invention, the first scrape and the second scrape partially close the cavity formed by the first, second and third portions of the main body. The first squeegee and the second squeegee have the function of scraping the screen cylinder intended to come partially in the chamber with squeegees.
Selon une caractéristique de l'invention, le corps principal comprend une première face destinée à être en regard au cylindre tramé, et une deuxième face opposée à la première face.  According to a characteristic of the invention, the main body comprises a first face intended to face the screened cylinder, and a second face opposite to the first face.
Selon une caractéristique de l'invention, le canal d'eau est positionné dans un creux du profilé du corps principal, un premier côté du canal d'eau étant agencé contre une première face intérieure du corps principal et un deuxième côté du canal d'eau, opposé au premier côté du canal d'eau étant agencé contre une deuxième face intérieure du corps principal.  According to one characteristic of the invention, the water channel is positioned in a hollow of the profile of the main body, a first side of the water channel being arranged against a first inner face of the main body and a second side of the channel of water, opposite the first side of the water channel being arranged against a second inner face of the main body.
Selon une caractéristique de l'invention, le canal d'eau est collé sur le corps principal. Avantageusement, le collage du canal d'eau est réalisé avec une colle expansive permettant de faire l'étanchéité. La colle utilisée pour coller le canal d'eau est par exemple une colle thermodurcissable.  According to one characteristic of the invention, the water channel is bonded to the main body. Advantageously, the water channel is bonded with an expansive adhesive for sealing. The glue used to glue the water channel is for example a thermosetting glue.
Selon une caractéristique de l'invention, le canal d'eau est réalisé en matériau composite comprenant par exemple du carbone. Selon une caractéristique de l'invention, le canal d'eau est un profilé.  According to one characteristic of the invention, the water channel is made of a composite material comprising, for example, carbon. According to one characteristic of the invention, the water channel is a profile.
Selon une caractéristique de l'invention, le canal d'eau est de section transversale sensiblement rectangulaire.  According to one characteristic of the invention, the water channel is of substantially rectangular cross section.
Selon une caractéristique de l'invention, la chambre à racles comprend en outre un canal d'encre, s'étendant au moins partiellement le long du corps principal, préférentiellement tout le long du corps principal. Le canal d'encre a pour fonction de réaliser l'encrage du groupe imprimeur par flexographie.  According to a feature of the invention, the doctor blade chamber further comprises an ink channel, extending at least partially along the main body, preferably all along the main body. The function of the ink channel is to ink the printing unit by flexography.
Avantageusement, le canal d'encre est agencé dans le creux du profilé du corps principal, et présente au moins une sortie d'encre débouchant dans le canal d'encre et s'étendant en saillie depuis le canal d'encre à travers la troisième portion du corps principal. Selon une caractéristique de l'invention, le canal d'encre est réalisé en matériau composite comprenant par exemple du carbone. Selon une caractéristique de l'invention, le canal d'encre est un profilé. Advantageously, the ink channel is arranged in the hollow of the profile of the main body, and has at least one ink outlet opening into the ink channel and projecting from the ink channel through the third channel. portion of the main body. According to one characteristic of the invention, the ink channel is made of a composite material comprising for example carbon. According to one characteristic of the invention, the ink channel is a profile.
Selon une caractéristique de l'invention, le canal d'encre est de section transversale sensiblement circulaire.  According to one characteristic of the invention, the ink channel is of substantially circular cross section.
Selon une caractéristique de l'invention, la chambre à racles comprend une première pièce d'extrémité et une deuxième pièce d'extrémité, chaque pièce d'extrémité étant agencée à une extrémité du corps principal de la chambre à racles.  According to a feature of the invention, the doctor blade chamber comprises a first end piece and a second end piece, each end piece being arranged at one end of the main body of the doctor blade chamber.
Selon une caractéristique de l'invention, une portion de la première pièce d'extrémité est insérée dans une première extrémité du profilé du corps principal.  According to a feature of the invention, a portion of the first end piece is inserted into a first end of the profile of the main body.
Selon une caractéristique de l'invention, une portion de la deuxième pièce d'extrémité est insérée dans une deuxième extrémité du profilé du corps principal.  According to a feature of the invention, a portion of the second end piece is inserted into a second end of the profile of the main body.
Avantageusement, chaque pièce d'extrémité est insérée puis collée dans le corps principal.  Advantageously, each end piece is inserted and then glued into the main body.
Selon une caractéristique de l'invention, la première pièce d'extrémité présente au moins un orifice conformé pour loger une canalisation reliant le canal d'eau à un réservoir d'eau.  According to a feature of the invention, the first end piece has at least one orifice shaped to house a pipe connecting the water channel to a water tank.
Selon une caractéristique de l'invention, la première pièce d'extrémité présente un deuxième orifice conformé pour loger une canalisation reliant le canal d'encre à un réservoir d'encre.  According to a feature of the invention, the first end piece has a second orifice shaped to house a pipe connecting the ink channel to an ink tank.
L'invention a également pour objet un procédé de fabrication d'un corps principal de chambres à racles, le procédé de fabrication étant caractérisé en ce qu'il comprend au moins une étape de pultrusion d'un corps principal selon l'invention.  The invention also relates to a method for manufacturing a main body of doctor blade chambers, the manufacturing method being characterized in that it comprises at least one pultrusion step of a main body according to the invention.
L'invention a également pour objet un procédé de fabrication d'une chambre à racles selon l'invention, le procédé de fabrication comprenant au moins une étape d'obtention d'un corps principal selon l'invention par pultrusion.  The invention also relates to a method of manufacturing a doctor blade chamber according to the invention, the manufacturing method comprising at least one step of obtaining a main body according to the invention by pultrusion.
Selon une caractéristique de l'invention, le procédé de fabrication comprend au moins une étape supplémentaire d'insertion et d'assemblage, préférentiellement par collage d'un canal d'eau conformé pour former un réseau d'eau dans le corps principal de la chambre à racles.  According to one characteristic of the invention, the manufacturing method comprises at least one additional step of insertion and assembly, preferably by gluing a shaped water channel to form a water network in the main body of the chamber with squeegees.
Selon une caractéristique de l'invention, le canal d'eau est assemblé préférentiellement collé dans la cavité du profilé du corps principal et particulièrement contre la première face et la deuxième face du profilé du corps principal. Avantageusement, la colle utilisée pour coller le canal d'eau est une colle expansible permettant de faire l'étanchéité de l'assemblage. According to a feature of the invention, the water channel is assembled preferably bonded in the cavity of the profile of the main body and particularly against the first face and the second face of the profile of the main body. Advantageously, the adhesive used to glue the water channel is an expandable adhesive for sealing the assembly.
Selon une caractéristique de l'invention, le procédé de fabrication comprend une étape de perçage d'au moins un orifice dans le corps principal et dans le canal d'eau, l'étape de perçage permettant le positionnement ultérieur de buses de lavage.  According to a feature of the invention, the manufacturing method comprises a step of drilling at least one orifice in the main body and in the water channel, the drilling step for the subsequent positioning of washing nozzles.
Selon une caractéristique de l'invention, le procédé de fabrication comprend en outre une étape d'insertion d'un canal d'encre au sein de la chambre à racles.  According to a feature of the invention, the manufacturing method further comprises a step of inserting an ink channel within the doctor chamber.
Selon une caractéristique de l'invention, le procédé de fabrication comprend une étape d'insertion et d'assemblage, préférentiellement par collage, d'une première pièce d'extrémité à une extrémité du corps principal de la chambre à racles et d'une deuxième pièce d'extrémité à l'autre extrémité du corps principal, tout en connectant la première pièce d'extrémité au canal d'eau et au canal d'encre.  According to one characteristic of the invention, the manufacturing method comprises a step of insertion and assembly, preferably by gluing, of a first end piece at one end of the main body of the doctor chamber and a second end piece at the other end of the main body, while connecting the first end piece to the water channel and the ink channel.
BREVE DESCRIPTION DES FIGURES BRIEF DESCRIPTION OF THE FIGURES
L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à un mode de réalisation selon la présente invention, donné à titre d'exemple non limitatif et expliqué avec référence aux figures schématiques annexées, dans lesquelles les signes de références numériques identiques correspondent à des éléments structurellement et/ou fonctionnellement identiques ou similaires. Les figures schématiques annexées sont listées ci-dessous :  The invention will be better understood, thanks to the following description, which relates to an embodiment according to the present invention, given by way of non-limiting example and explained with reference to the appended diagrammatic figures, in which the signs of Like reference numerals correspond to structurally and / or functionally identical or similar elements. The attached schematic figures are listed below:
- la figure 1 est une illustration schématique d'un groupe imprimeur de flexographie comprenant une chambre à racles classique,  FIG. 1 is a schematic illustration of a flexographic printing unit comprising a conventional doctor blade chamber,
- la figure 2 est une vue en perspective de la chambre à racles selon l'invention,  FIG. 2 is a perspective view of the doctor chamber according to the invention,
- la figure 3 est une vue en perspective du corps principal de la chambre à racles selon l'invention et comme illustré en figure 2,  FIG. 3 is a perspective view of the main body of the doctor chamber according to the invention and as illustrated in FIG. 2,
- la figure 4 est une vue en perspective partielle de la chambre à racles selon l'invention et comme illustré aux figures 2 et 3,  FIG. 4 is a partial perspective view of the doctor chamber according to the invention and as illustrated in FIGS. 2 and 3,
- la figure 5 est une vue de détail selon l'encadré A de la figure 4,  FIG. 5 is a detail view according to box A of FIG. 4,
- la figure 6 est une vue de détail partielle de la chambre à racles selon l'invention et comme illustré aux figures 2 à 5,  FIG. 6 is a partial detail view of the doctor chamber according to the invention and as illustrated in FIGS. 2 to 5,
- la figure 7 est une vue de côté du corps principal de la chambre à racles selon l'invention. DESCRIPTION DETAILLEE DES FIGURES - Figure 7 is a side view of the main body of the doctor chamber according to the invention. DETAILED DESCRIPTION OF THE FIGURES
Comme décrit plus haut pour illustrer le contexte de l'invention, un groupe imprimeur 100 comprend :  As described above to illustrate the context of the invention, a printing unit 100 comprises:
un cylindre porte-cliché 104 configuré pour supporter un cliché ou forme d'impression 108,  a forme cylinder 104 configured to support a photograph or printing form 108,
un cylindre tramé ou cylindre anilox 103, présentant sur sa surface une pluralité d'alvéoles destinées à recueillir de l'encre en quantité contrôlée par le volume des alvéoles, le cylindre tramé 103 étant configuré pour transférer l'encre sur le cliché lOx,  an anilox roll or cylinder 103, having on its surface a plurality of cells for collecting ink in an amount controlled by the volume of the cells, the screened cylinder 103 being configured to transfer the ink to the plate 10x,
- une chambre à racles 101, configurée pour remplir les alvéoles du cylindre tramé 103,  a chamber with doctor blades 101, configured to fill the cells of the screened cylinder 103,
une pompe 102 assurant l'acheminement de l'encre du réservoir d'encre 107 vers la chambre à racles 101, et  a pump 102 for conveying ink from the ink tank 107 to the doctor chamber 101, and
un cylindre de contre-pression 105 maintenant le support en cours d'impression 106 contre le cylindre porte-cliché 104, et ainsi contre le cliché 108.  a counter-pressure cylinder 105 holding the support being printed 106 against the forme cylinder 104, and thus against the plate 108.
La chambre à racles de l'invention est désignée par la référence numérique 1 et est illustrée en détails en référence aux figures 2 à 7.  The doctor blade chamber of the invention is designated by numeral 1 and is illustrated in detail with reference to FIGS. 2-7.
La chambre à racles 1 selon l'invention comprend un corps principal 2 réalisé en une seule pièce qui est un profilé creux fermé, comme illustré notamment en figure 3. Le corps principal 2 présente une épaisseur constante et uniforme en tous points de la section et sur toute la longueur du profilé, comme illustré notamment aux figures 3, 6 et 7. Le corps principal 2 s'étend selon un axe principal longitudinal X-X comme illustré notamment aux figures 2 et 3. En outre, le corps principal 2 est réalisé en carbone composite pultrudé.  The doctor blade chamber 1 according to the invention comprises a main body 2 made in one piece which is a closed hollow profile, as illustrated in particular in FIG. 3. The main body 2 has a constant and uniform thickness in all points of the section and over the entire length of the profile, as illustrated in particular in Figures 3, 6 and 7. The main body 2 extends along a longitudinal main axis XX as illustrated in particular in Figures 2 and 3. In addition, the main body 2 is made of pultruded composite carbon.
Comme visible en figure 3, le corps principal 2 présente une première portion 2a, une deuxième portion 2b et une troisième portion 2c. La troisième portion As visible in Figure 3, the main body 2 has a first portion 2a, a second portion 2b and a third portion 2c. The third portion
2c relie la première portion 2a et la deuxième portion 2b, la troisième portion 2c étant conformée et destinée à recevoir partiellement un cylindre tramé en son sein. Comme on peut le voir en figure 3, la troisième portion 2c est en retrait par rapport à la première portion 2a et à la deuxième portion 2b du corps principal 2, de sorte qu'entre la première portion et la deuxième portion une cavité 2e est formée. 2c connects the first portion 2a and the second portion 2b, the third portion 2c being shaped and intended to partially receive a screened cylinder within it. As can be seen in FIG. 3, the third portion 2c is set back relative to the first portion 2a and to the second portion 2b of the main body 2, so that between the first portion and the second portion a cavity 2e is formed.
En outre, le corps principal 2 présente une première face 2.1 destinée à être en regard au cylindre tramé et une deuxième face 2.2 opposée à la première face In addition, the main body 2 has a first face 2.1 intended to be facing the screen cylinder and a second face 2.2 opposite to the first face
2.1 comme illustré en figure 3. 2.1 as illustrated in Figure 3.
Selon l'invention, la chambre à racles 1 comprend en outre une première racle 3, la première racle 3 étant montée sur la première portion 2a du corps principal 2 au moyen d'une bride de première racle 5 comme représenté aux figures 2 et 7. Chaque bride est maintenue par un système de fixation 7 consistant en la coopération d'une vis ou un pion, visible en figure 2 avec un insert 7a et visible aux figures 4 et 7 par exemple. De plus, la chambre à racles 1 comprend une deuxième racle 4, la deuxième racle 4 étant montée sur la deuxième portion 2b du corps principal 2, en regard de la première racle 3, au moyen d'une bride de deuxième racle 6 comme représenté aux figures 2 et 7. Dans l'exemple illustré aux figures 2 et 7, la première racle 3 et la deuxième racle 4 ferment partiellement la cavité 2e formée par les première 2a, deuxième 2b et troisième 2c portions du corps principal 2. According to the invention, the doctor blade chamber 1 further comprises a first doctor blade 3, the first doctor blade 3 being mounted on the first portion 2a of the main body 2 by means of a first doctor blade flange 5 as shown in FIGS. 2 and 7. Each flange is held by a fastening system 7 consisting of the cooperation of a screw or a pin, visible in FIG. 2 with an insert 7a and visible in Figures 4 and 7 for example. In addition, the doctor blade chamber 1 comprises a second doctor blade 4, the second doctor blade 4 being mounted on the second portion 2b of the main body 2, facing the first doctor blade 3, by means of a second doctor blade flange 6 as shown. In the example illustrated in FIGS. 2 and 7, the first doctor blade 3 and the second doctor blade 4 partly close the cavity 2e formed by the first 2a, second 2b and third 2c portions of the main body 2.
Selon l'invention, le corps principal 2 comprend un textile non-tissé 16 agencé en surface du corps principal 2 comme représenté en trait continu sur la figure 7. Dans l'exemple illustré en figure 7, le textile non-tissé 16 est représenté comme couvrant la totalité de la surface du corps principal 2 mais, dans des variantes non représentées, le textile non-tissé pourrait ne couvrir qu'une partie du corps principal 2 par exemple uniquement la première face 2.1 ou uniquement la deuxième face 2.2 ou seulement une des portions 2a, 2b, 2c du corps principal 2.  According to the invention, the main body 2 comprises a nonwoven fabric 16 arranged on the surface of the main body 2 as shown in solid line in FIG. 7. In the example illustrated in FIG. 7, the nonwoven fabric 16 is represented as covering the entire surface of the main body 2 but, in variants not shown, the nonwoven fabric could cover only part of the main body 2 for example only the first face 2.1 or only the second face 2.2 or only one of the portions 2a, 2b, 2c of the main body 2.
Selon l'invention, et comme représenté notamment en figure 7, la chambre à racles 1 comprend un canal d'eau 11 sous pression, agencé dans le corps principal 2 et plus précisément dans le creux 2d du profilé du corps principal 2 au niveau de la troisième portion 2c. Le canal d'eau 11 s'étend avantageusement sur toute la longueur du corps principal 2. Avantageusement, le canal d'eau 11 est un profilé de section transversale sensiblement rectangulaire.  According to the invention, and as represented in particular in FIG. 7, the scraper chamber 1 comprises a water channel 11 under pressure, arranged in the main body 2 and more precisely in the hollow 2d of the profile of the main body 2 at the level of the third portion 2c. The water channel 11 advantageously extends over the entire length of the main body 2. Advantageously, the water channel 11 is a profile of substantially rectangular cross section.
Comme on peut le voir en figure 7, un premier côté 2.3 partie du canal d'eau 11 est agencée contre la première face 2.1 intérieure du corps principal 2 et un deuxième côté 2.4 du canal d'eau 11, opposé au premier côté du canal d'eau 11 est agencée contre la deuxième face 2.2 intérieure du corps principal 2.  As can be seen in FIG. 7, a first side 2.3 of the water channel 11 is arranged against the first internal face 2.1 of the main body 2 and a second side 2.4 of the water channel 11, opposite the first side of the channel of water 11 is arranged against the second internal face 2.2 of the main body 2.
Selon l'invention, le canal d'eau 11 comprend au moins une pluralité de buses de lavage 10 débouchant dans le canal d'eau 11 et s'étendant en saillie depuis le canal d'eau 11 à travers la troisième portion 2c du corps principal 2 comme illustré aux figures 2 et 7. Dans l'exemple illustré en figure 7, le canal d'eau 11 est collé dans le corps principal 2 au moyen d'une colle 17 expansive permettant de faire l'étanchéité. Avantageusement, les buses de lavage 10 de la pluralité sont espacées régulièrement tout le long du canal d'eau 11. Comme on peut le voir en figure 7, les buses de lavage 10 débouchent dans la cavité 2e formée par les première, deuxième et troisième portions 2a, 2b ,2c du corps principal 2. Par ailleurs, la chambre à racles 1 selon l'invention comprend un canal d'encre 12, s'étendant tout le long du corps principal 2 et agencé dans le creux 2d du profilé du corps principal 2. Le canal d'encre 12 comprend au moins une sortie d'encre 13 illustrée en figure 6 débouchant dans le canal d'encre 12 et s'étendant en saillie depuis le canal d'encre 12 à travers la troisième portion 2c du corps principal 2. Avantageusement, le canal d'encre 12 est un profilé de section transversale sensiblement circulaire. According to the invention, the water channel 11 comprises at least a plurality of washing nozzles 10 opening into the water channel 11 and projecting from the water channel 11 through the third portion 2c of the body main 2 as illustrated in Figures 2 and 7. In the example illustrated in Figure 7, the water channel 11 is bonded in the main body 2 by means of an expansive adhesive 17 for sealing. Advantageously, the plurality of washing nozzles 10 are evenly spaced along the water channel 11. As can be seen in FIG. 7, the washing nozzles 10 open into the cavity 2e formed by the first, second and third portions 2a, 2b, 2c of the main body 2. Furthermore, the doctor chamber 1 according to the invention comprises an ink channel 12, extending all along the main body 2 and arranged in the hollow 2d of the profile of the main body 2. The ink channel 12 comprises at least one ink outlet 13 shown in FIG. 6 opening into the ink channel 12 and protruding from the ink channel 12 through the third portion 2c of the main body 2. Advantageously, the channel ink 12 is a substantially circular cross-sectional profile.
Selon l'invention, la chambre à racles comprend une première pièce d'extrémité 8a et une deuxième pièce d'extrémité 8b, chaque pièce d'extrémité 8a, 8b étant agencée à une extrémité du corps principal 2 de la chambre à racles 1. Comme on peut le voir notamment en figure 4, une portion de la première pièce d'extrémité 8a est insérée dans une première extrémité le profilé du corps principal 2 et une portion de la deuxième pièce d'extrémité 8b est insérée dans une deuxième extrémité le profilé du corps principal 2.  According to the invention, the doctor blade chamber comprises a first end piece 8a and a second end piece 8b, each end piece 8a, 8b being arranged at one end of the main body 2 of the doctor blade chamber 1. As can be seen in particular in Figure 4, a portion of the first end piece 8a is inserted into a first end of the profile of the main body 2 and a portion of the second end piece 8b is inserted into a second end on main body profile 2.
Avantageusement, la première pièce d'extrémité 8a présente au moins un orifice conformé pour loger une canalisation 9a reliant le canal d'eau 11 à un réservoir d'eau et un deuxième orifice conformé pour loger une canalisation 9b reliant le canal d'encre 12 à un réservoir d'encre comme illustré aux figures 7 et 2.  Advantageously, the first end piece 8a has at least one orifice shaped to house a pipe 9a connecting the water channel 11 to a water tank and a second hole shaped to house a pipe 9b connecting the ink channel 12 to an ink tank as shown in Figures 7 and 2.
Par ailleurs, la chambre à racles 1 comprend un support 14 illustré sur les figures 2 à 5 et 7 agencé sur la deuxième face 2.2 du corps principal 2 et configuré pour renforcer la chambre à racles 1. De plus, la chambre à racles 1 comprend un crochet 15 destiné à permettre l'accrochage du système de chambre à racles 1.  Furthermore, the blade chamber 1 comprises a support 14 illustrated in Figures 2 to 5 and 7 arranged on the second face 2.2 of the main body 2 and configured to strengthen the doctor blade chamber 1. In addition, the doctor blade chamber 1 comprises a hook 15 intended to allow attachment of the doctor chamber system 1.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté aux figures annexées. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.  Of course, the invention is not limited to the embodiment described and shown in the accompanying figures. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

REVENDICATIONS
1. Corps principal (2) de chambres à racles (1) comprenant une première portion (2a) configurée pour maintenir une première racle (3), une deuxième portion (2b) configurée pour maintenir une deuxième racle (4), une troisième portion (2c) reliant la première portion (2a) et la deuxième portion (2b), une cavité (2e) destinée à recevoir de l'encre et délimitée au moins par la première portion (2a), la deuxième portion (2b) et la troisième portion (2c), caractérisé en ce que le corps principal (2) est un unique profilé fermé creux s'étendant selon un axe principal longitudinal X-X, le corps principal (2) étant réalisé en matériau composite pultrudé. 1. Main body (2) of doctor blade chambers (1) comprising a first portion (2a) configured to hold a first doctor blade (3), a second portion (2b) configured to hold a second doctor blade (4), a third portion (2c) connecting the first portion (2a) and the second portion (2b), a cavity (2e) intended to receive ink and bounded at least by the first portion (2a), the second portion (2b) and the third portion (2c), characterized in that the main body (2) is a single hollow closed profile extending along a longitudinal main axis XX, the main body (2) being made of pultruded composite material.
2. Corps principal selon la revendication 1, dans lequel le matériau composite est un carbone composite pultrudé. The main body of claim 1, wherein the composite material is a pultruded composite carbon.
3. Corps principal selon l'une quelconque des revendications 1 ou 2, dans lequel le matériau composite dans lequel est réalisé le corps principal comprend un volume de fibre strictement supérieur à 60% du volume du composite. 3. Main body according to any one of claims 1 or 2, wherein the composite material in which the main body is formed comprises a fiber volume strictly greater than 60% of the volume of the composite.
4. Corps principal selon la revendication 3, dans lequel le volume de fibre est compris entre 61% et 70% du volume du composite. The main body of claim 3, wherein the fiber volume is between 61% and 70% of the volume of the composite.
5. Corps principal selon l'une quelconque des revendications 1 à 4, comprenant un textile non-tissé (16) agencé en surface du corps principal (2), le textile non-tissé (16) étant intégré dans la masse du corps principal (2). 5. Main body according to any one of claims 1 to 4, comprising a nonwoven fabric (16) arranged on the surface of the main body (2), the nonwoven fabric (16) being integrated into the mass of the main body (2).
6. Corps principal selon l'une quelconque des revendications 1 à 5, dans lequel le matériau composite dans lequel le corps principal est réalisé par pultrusion avec un taux de fibre strictement supérieur à 60%, présente un ratio de performance supérieur à 112% par rapport au ratio de performance d'un même matériau composite en moulage par injection basse pression de résine. 6. Main body according to any one of claims 1 to 5, wherein the composite material in which the main body is made by pultrusion with a fiber ratio strictly greater than 60%, has a performance ratio greater than 112% by ratio to the performance ratio of the same composite material in low-pressure resin injection molding.
7. Chambre à racles (1) comprenant : 7. Chamber with doctor blades (1) comprising:
- un corps principal (2) selon l'une quelconque des revendications 1 à 6, - une première racle (3) montée sur une première portion (2a) du corps principal (2), - une deuxième racle (4) montée sur une deuxième portion (2b) du corps principal (2), en regard de la première racle (3). - a main body (2) according to any one of claims 1 to 6, - a first doctor blade (3) mounted on a first portion (2a) of the main body (2), - A second squeegee (4) mounted on a second portion (2b) of the main body (2), facing the first squeegee (3).
8. Chambre à racles selon la revendication 7, comprenant un canal d'eau (11) sous pression, agencé dans le corps principal (2). 8. doctor chamber according to claim 7, comprising a water channel (11) under pressure, arranged in the main body (2).
9. Chambre à racles selon la revendication 8, dans laquelle le canal d'eau (11) comprend au moins une buse de lavage (10) débouchant dans le canal d'eau (11) et s'étendant en saillie depuis le canal d'eau (11) à travers la troisième portion (2c) du corps principal (2). 9. doctor chamber according to claim 8, wherein the water channel (11) comprises at least one washing nozzle (10) opening into the water channel (11) and projecting from the water channel (11). water (11) through the third portion (2c) of the main body (2).
10. Chambre à racles selon l'une quelconque des revendications 8 ou 9, dans laquelle le canal d'eau (11) est positionné dans un creux (2d) du profilé du corps principal (2), un premier côté (2.3) du canal d'eau (11) étant agencé contre une première face (2.1) intérieure du corps principal (2) et un deuxième côté (2.4) du canal d'eau (11), opposé au premier côté (2.3) du canal d'eau (11) étant agencé contre une deuxième face (2.2) intérieure du corps principal (2). 10. Chamber with doctor blade according to any one of claims 8 or 9, wherein the water channel (11) is positioned in a recess (2d) of the profile of the main body (2), a first side (2.3) of water channel (11) being arranged against a first inner face (2.1) of the main body (2) and a second side (2.4) of the water channel (11) opposite the first side (2.3) of the water channel (11). water (11) being arranged against a second inner face (2.2) of the main body (2).
11. Chambre à racles selon l'une quelconque des revendications 8 à 10, dans laquelle le canal d'eau (11) est un profilé en matériau composite comprenant du carbone. 11. Chamber with doctor blades according to any one of claims 8 to 10, wherein the water channel (11) is a profile of composite material comprising carbon.
12. Procédé de fabrication d'un corps principal (2) de chambres à racles (1), le procédé de fabrication étant caractérisé en ce qu'il comprend au moins une étape de pultrusion d'un corps principal selon l'une quelconque des revendications 1 à 6. 12. A method of manufacturing a main body (2) of doctor blade chambers (1), the manufacturing method being characterized in that it comprises at least one pultrusion step of a main body according to any one of Claims 1 to 6.
13. Procédé de fabrication d'une chambre à racles selon l'une quelconque des revendications 7 à 11, le procédé de fabrication étant caractérisé en ce qu'il comprend au moins une étape d'obtention d'un corps principal selon le procédé selon la revendication 12. 13. A method of manufacturing a doctor blade chamber according to any one of claims 7 to 11, the manufacturing method being characterized in that it comprises at least one step of obtaining a main body according to the method according to claim 12.
14. Procédé de fabrication selon la revendication 13, comprenant au moins une étape supplémentaire d'insertion et d'assemblage, préférentiellement par collage d'un canal d'eau (11) conformé pour former un réseau d'eau dans le corps principal (2) de la chambre à racles (1). 14. Manufacturing method according to claim 13, comprising at least one additional step of insertion and assembly, preferably by gluing a water channel (11) shaped to form a water network in the main body ( 2) the doctor chamber (1).
PCT/FR2018/051702 2017-07-07 2018-07-06 Main body of doctor blade chamber, doctor blade chamber thereof and methods of manufacturing same WO2019008295A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2020500063A JP7084980B2 (en) 2017-07-07 2018-07-06 Doctor blade chamber and its manufacturing method
KR1020207002205A KR20200026907A (en) 2017-07-07 2018-07-06 Body of doctor blade chamber, doctor blade chamber and method of manufacturing same
EP18752560.5A EP3648976A1 (en) 2017-07-07 2018-07-06 Main body of doctor blade chamber, doctor blade chamber thereof and methods of manufacturing same
CN201880045426.5A CN110891791B (en) 2017-07-07 2018-07-06 Doctor blade chamber body, doctor blade chamber and method of manufacturing doctor blade chamber
US16/629,126 US11110701B2 (en) 2017-07-07 2018-07-06 Main body of a doctor blade chamber, doctor blade chamber thereof and methods of manufacturing same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR17/56404 2017-07-07
FR1756404A FR3068642A1 (en) 2017-07-07 2017-07-07 MAIN BODY OF RACLE CHAMBER, ASSOCIATED RACLE CHAMBER AND METHODS OF MANUFACTURING THE SAME.
FR17/57253 2017-07-28
FR1757253A FR3068643B1 (en) 2017-07-07 2017-07-28 MAIN BODY OF RACLE CHAMBER, ASSOCIATED RACLE CHAMBER AND METHODS OF MANUFACTURING THE SAME.

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IT201900006649A1 (en) * 2019-05-09 2019-08-09 Packaging Plast S R L Process for making carbon fiber chamber doctor blade profiles, equipment for carrying out this process and chamber doctor blade made using this process and equipment

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WO2005090080A1 (en) 2004-03-19 2005-09-29 Tresu Anlaeg A/S Cleaning an ink chamber of a printing unit
FR2881370A1 (en) * 2005-01-31 2006-08-04 Epsilon Composite Sarl Sarl Production of a lined roller for printing and shaping, comprises solidarizing the vented end pieces to a tube to form a roller, coating an elastomer on the roller, heat polymerizing and treating the surface of the coating
EP1805016A1 (en) * 2004-09-28 2007-07-11 Absolute Engineering Limited Ink recovery system
US20090266256A1 (en) * 2008-04-28 2009-10-29 Ewald Rothlein Doctor blade system
EP2233391A1 (en) * 2009-03-25 2010-09-29 Bolidt Maatschappij tot Exploitatie van Kunststoffen en Bouwwerken B.V. Railing element and method for the making thereof
WO2016192735A1 (en) 2015-06-04 2016-12-08 Tresu A/S Composite doctor blade chamber

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Publication number Priority date Publication date Assignee Title
WO2005090080A1 (en) 2004-03-19 2005-09-29 Tresu Anlaeg A/S Cleaning an ink chamber of a printing unit
EP1805016A1 (en) * 2004-09-28 2007-07-11 Absolute Engineering Limited Ink recovery system
FR2881370A1 (en) * 2005-01-31 2006-08-04 Epsilon Composite Sarl Sarl Production of a lined roller for printing and shaping, comprises solidarizing the vented end pieces to a tube to form a roller, coating an elastomer on the roller, heat polymerizing and treating the surface of the coating
US20090266256A1 (en) * 2008-04-28 2009-10-29 Ewald Rothlein Doctor blade system
EP2233391A1 (en) * 2009-03-25 2010-09-29 Bolidt Maatschappij tot Exploitatie van Kunststoffen en Bouwwerken B.V. Railing element and method for the making thereof
WO2016192735A1 (en) 2015-06-04 2016-12-08 Tresu A/S Composite doctor blade chamber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900006649A1 (en) * 2019-05-09 2019-08-09 Packaging Plast S R L Process for making carbon fiber chamber doctor blade profiles, equipment for carrying out this process and chamber doctor blade made using this process and equipment

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