EP2103358A1 - Dispositif à racle - Google Patents

Dispositif à racle Download PDF

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Publication number
EP2103358A1
EP2103358A1 EP09154692A EP09154692A EP2103358A1 EP 2103358 A1 EP2103358 A1 EP 2103358A1 EP 09154692 A EP09154692 A EP 09154692A EP 09154692 A EP09154692 A EP 09154692A EP 2103358 A1 EP2103358 A1 EP 2103358A1
Authority
EP
European Patent Office
Prior art keywords
doctor
head part
bed
foot part
substrate
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.)
Granted
Application number
EP09154692A
Other languages
German (de)
English (en)
Other versions
EP2103358B1 (fr
Inventor
Christoph Henninger
Horst Kaipf
Martin Schaubmaier
Michael Heitzinger
Rüdiger Keinberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2103358A1 publication Critical patent/EP2103358A1/fr
Application granted granted Critical
Publication of EP2103358B1 publication Critical patent/EP2103358B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/044—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for holding the blades

Definitions

  • a squeegee device contains wearing parts, which often have to be replaced.
  • the device is susceptible to contamination and requires frequent cleaning. Also for this purpose, individual components must be removed and replaced if necessary.
  • a generic doctor device is from the DE-A1 10 2004 029 565 known.
  • the clamping tube and also the pressure hose is received in a retaining strip.
  • the retaining strip is connected to the head part, ie the doctor bed.
  • the retaining strip at the same time forms the foot part of the exchangeable doctor unit, which is held in a holder or in Rakeltragbalken.
  • the clamping hose is received directly in the foot part. That is, it is an integral part of the foot part of the doctor unit.
  • This embodiment has the advantage that the doctor unit - ie head part or doctor bed together with the doctor bar, retaining strip or foot part together with clamping hose - can be removed from the doctor blade holder or the supporting doctor bar. The cleaning of the seat of the doctor unit can thereby go much faster.
  • clamping hose is always arranged on the side of the doctor unit which faces away from the medium (this is the same side on which the rear side of the head part or of the doctor bed is located and which faces away from the doctor bar pressed against the running substrate) he protected against contamination by the application medium when doctoring or leveling.
  • the contact pressure element is a non-integral part of the head part and is accommodated in an external pressure device and acts from the outside on the rear side of the head part or the doctor bed lying opposite the groove.
  • the advantage of this design is that the pressing element can remain in the device and not every time the doctor unit is removed with must be changed. The replacement takes place faster than before, which is why the downtime for the coating machines is lower than before and thus the productivity is increased.
  • At least one sealing tube is provided for the head part or the doctor bed.
  • a single sealing tube above or below the doctor rod receiving groove and also when using a second sealing tube (below and above the doctor rod receiving groove) can be acted upon by the sealing tube sealing lip so press against the metering rod, that the metering rod is performed better for a better and on the other hand, the seat of the metering rod is less susceptible to contamination.
  • the doctor bar can much faster and easier to remove from the doctor bed as without the presence of the or the sealing hoses. This helps to reduce service and maintenance times and, consequently, reduce coater downtime, which in turn increases productivity.
  • the invention also relates to a coating machine for the application of a liquid to pasty application medium, for example coating color to a running substrate, wherein the substrate is the surface of a running paper, board or other fibrous web and the surface of a transfer element in the case of indirect application, which dispenses the application medium to the fibrous web.
  • the coating machine according to the invention has a against the Ongoing underground doctor blade device with a replaceable doctor unit for metering and / or leveling of the applied application medium according to one or more of claims 1 to 26.
  • a per se known coating machine can be easily retrofitted with the inventive devices or a combined device.
  • a modular composite doctor blade device is shown in each case, which is arranged downstream of a coating machine not shown with applicator and the metering and / or leveling of a coating medium 1, for example, coating paint on a running surface 2 is used.
  • This ongoing background 2 is for clarity only in the FIG. 1 marked with.
  • Underground 2 should be in the examples given a running, to be refined paper or board web.
  • the doctor device comprises a replaceable doctor unit 3, which consists of a head part 4, a foot part 5 and a clamping tube 6.
  • the head part 4 serves as a doctor bed 7 for a rotatable circular-cylindrical doctor rod 8 as a doctor element (ie metering or leveling element) for the application medium 1.
  • the doctor bed 7 has a receptacle or a groove 9 for the doctor bar 8 rotatable therein.
  • the doctor bed 7 also has two sealing lips 7.1 and 7.2, which seal the doctor blade against contamination.
  • the foot part 5 carries the head part 4 and the doctor bed 7 and is also held in a support beam 10. This is done with the integrated in the foot part 5 terminal tube 6.
  • the foot part 5 has for this purpose a specially molded bracket 11th on, in which the clamping tube 6 is inserted.
  • the head part 4 and the metering rod 8 are for the purpose of metering or leveling of the applied application medium 1 with a pressing element 12 against the substrate to be coated 2 pressed.
  • Abgerakeltes medium flows along a front side 13 in a likewise only in this FIG. 1 illustrated gutter 14th
  • the doctor device for the contact pressure 12 has a pressing device 15.
  • This is an external assembly and consists of a holding body 16, a pressure bar 17 with bracket 18, which receives the contact pressure element 12, in particular a pressure hose 12.1 and an adjusting device 19 has.
  • the pressing element 12, ie the Anpressschlauch 12.1 shown here is thus a non-integral part of the head part 4 and acts from the outside on the groove 9 opposite the back 20 of the head part 4 and the doctor bed 7 a.
  • the support beam 10, also referred to as a doctor blade holder or doctor bar, is otherwise designed to be swingable away from the substrate 2 to be coated for the purpose of replacing the doctor unit 3.
  • FIG. 1 also shows that the foot part 5 is positioned on a contact surface 21 of the doctor beam 10. As a result, a reproducible position of the entire doctor unit 3 is created.
  • a flexible section 22 is present between the head part 4 and the foot part 5.
  • a bending point 22.1 has been selected.
  • the flexible portion 22 could also have an unillustrated pivot for the purpose of tilting or pivoting movement.
  • the bending point 22.1 shown here can be designed, for example, as a notch or as a constriction or in the form of a leaf spring.
  • the flexible section 22 is indicated only by a dashed circle.
  • FIG. 1 It can be seen that the head part 4 and the foot part 5 are separate components.
  • This embodiment offers the possibility to manufacture the head part 4 or doctor bed 7 and the foot part 5 from different hard and / or different thermal materials. But this also offers the possibility that they are decoupled from each other in terms of their thermal expansion.
  • FIG. 2 is a variation of FIG. 1 to see.
  • the doctor unit 3 has in this variant instead of the foot part 5 FIG. 1 a continuous, one-piece retaining strip 23, which in addition to the holder 11 for the clamping hose has an additional holder 24 for the head part 4 and the doctor bed 7.
  • This retaining strip 23 also has a flexible section 22 or a bending point 22. Retaining strip 23 and the head part 4 are separate components, with the properties for the separate foot part 5 and the head part 4 in FIG. 1 have been described.
  • FIG. 3 is another variation to that in FIG. 1 shown device shown.
  • foot part 5 and the head part 4 are positively connected with each other.
  • the head part 4 or doctor blade bed 7 has at least one groove 25 into which the foot part 5 engages with at least one bead 26.
  • pressing element 12 is here no pressure hose 12.1 act, but find another conceivable type of contact force use.
  • This external contact force is designated 12.2.
  • FIG. 3 also shows that the doctor bed 7 has a sealing tube 27. This sealing tube 27 is received in a recess 28 of the doctor bed 7 and can press the lower sealing lip 7.2 on the metering rod 8 and thus prevent contamination of the receiving groove 9, but at least minimize.
  • FIG. 4 a further embodiment of the doctor unit is shown.
  • a further recess 29 possibly in addition to the recess 28 with sealing tube 27 or only this one recess 29 for a sealing tube 30 alone, above the metering rod 8. This can achieve a seal by means of the upper sealing lip 7.1 and thus also or additionally prevent soiling of the receiving groove 9, but at least minimize.
  • FIG. 4 shows, in contrast to the previous figures that headboard 4 and footboard 5 are integrally formed with each other.
  • the foot part 5 likewise has again a flexible section 22 or a bending point 22.1.
  • the foot part is wider than the separate foot part FIG. 1 or FIG. 3 so that there is no need for an extra holder 11 for receiving the clamping tube 6, but the clamping tube 6 is received here in a simple manner in a recess 31 directly in the foot part 4.
  • FIG. 5 is essentially the same as in FIG. 1 shown variant. Only here is still a sealing tube 32 is present, which is arranged above the contact pressure element 12 and the pressure hose 12.1 at the opposite of the doctor rod receiving groove 9 back 20 of the head part 4 and the doctor bed 7.
  • the sealing tube 32 is arranged in the same external pressure device 15 as the pressure hose 12.1, but was inserted into a further holder 33.
  • FIG. 6 shows a further variant, which is essentially the in FIG. 4 shown variant with one-piece design of the foot part and the head part, widened foot part 5, bending point 22 and integrated recess 31 for the clamping tube 6 corresponds.
  • a further sealing tube in the form of a sealing tube 34 arranged on the rear side 20 is arranged here.
  • two sealing hoses act on the upper sealing lip 7.1.
  • Both hoses, ie hose 34 and hose 12.3 are here not included in an external pressure device 15 in contrast to all other versions, but store directly in the head part 4 and in the doctor bed 7 in recesses 35 and 36.
  • When removing the doctor unit are here simultaneously removed all existing pressure hoses from the device with, which means a huge saving of time.
  • the head part 4 or doctor bed 7 may consist of materials such as thermoplastics, polymers, rubber or material mixtures of the aforementioned types of materials.
  • the foot part 5 is made of materials such as thermoplastics, polymers, thermosets, e.g. GRP, CFRP, made of steel or light metal, such as aluminum.
  • the pressure hose 12.1 and 12.3, the clamping tube 6 and the sealing tubes 27, 30, 32 and 34 are each formed as a round tube or profile hose, for example as a commercial nose tube and can from the materials such as rubber, rubber-reinforced fabric, fabric-containing PVC, silicone, natural rubber or Fluoroelastomer be prepared.
  • the head part 4 or the doctor bed 7 and the foot part 5 is made of the same material. If desired, it is also possible to produce the head part 4 or the doctor bed 7 and the foot part 5 from differently hard and / or different thermal materials.
  • head and foot can each consist of several items that are integrally connected.
  • the multiple items may consist of different or different materials.
  • FIGS. 1 to 6 show, moreover, that the head part 4 or doctor bed 7 polygonal and the foot part 5 is formed like a blade.
  • the foot part 5 is in any case suitable to carry different prefabricated sizes and shapes of the head part 4 and the doctor bed 7, for example, depending on the size of the selected metering rod 8.
  • diameters between 5 and 100 mm, preferably 8 to 40 mm, as well as smooth or grooved doctor bars are suitable as doctor bar sizes.
  • a selectable spring travel in a flexurally elastic portion, or a pivoting or tilting area (when using a joint) and / or the load capacity and / or the service life of differently shaped foot parts 5, can these are already prefabricated. If required, these components can be provided quickly and easily.
  • the particular advantage of the invention is that a squeegee device of a plurality of different formable, prefabricatable and storable head parts 4 or squeegee 7, 5 foot sections, retaining strips 23, Anpress- and clamping hoses, sealing tubes 27, 30, 32, 34 and doctor bars. 8 on the one hand modular buildable and easily accessible.
  • wear parts of the squeegee device or of the squeegee unit 3 can be exchanged, repaired and / or cleaned without a prolonged loss of production.
  • the invention is not limited only to the exemplary embodiments shown.

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  • Coating Apparatus (AREA)
EP20090154692 2008-03-18 2009-03-10 Dispositif à racle Active EP2103358B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810000723 DE102008000723A1 (de) 2008-03-18 2008-03-18 Rakelvorrichtung

Publications (2)

Publication Number Publication Date
EP2103358A1 true EP2103358A1 (fr) 2009-09-23
EP2103358B1 EP2103358B1 (fr) 2015-03-25

Family

ID=40626601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090154692 Active EP2103358B1 (fr) 2008-03-18 2009-03-10 Dispositif à racle

Country Status (2)

Country Link
EP (1) EP2103358B1 (fr)
DE (1) DE102008000723A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076629A1 (fr) * 2009-12-22 2011-06-30 Btg Ipi, Llc Systèmes de verrouillage de lit à tige
EP2570194A1 (fr) * 2011-09-13 2013-03-20 Horst Sprenger GmbH Système de dosage à racle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0541502A1 (fr) * 1991-11-06 1993-05-12 Valmet Corporation Procédé et équipement pour garder propre la baguette de couchage et son support dans une coucheuse à baguette, et pour empêcher les fuites d'eau de lubrification et/ou de refroidissement
DE29510486U1 (de) * 1995-06-30 1995-08-17 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Rollrakel-Baugruppe
DE19602483C1 (de) * 1996-01-24 1997-06-05 Voith Sulzer Papiermasch Gmbh Rollrakelbaugruppe
DE19631913A1 (de) * 1996-08-07 1998-02-19 Voith Sulzer Papiermasch Gmbh Auftragwerk zum direkten oder indirekten einseitigen oder beidseitigen Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
EP0906788A2 (fr) * 1997-10-01 1999-04-07 Voith Sulzer Papiertechnik Patent GmbH Dispositif de râclage pour un appareil d'application de produits fluides à pâteux sur un substrat défilant
WO2000063494A1 (fr) * 1999-04-20 2000-10-26 Metso Paper, Inc. Dispositif de couchage
DE102004029565A1 (de) * 2004-06-18 2006-01-05 Voith Paper Patent Gmbh Rakelvorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0541502A1 (fr) * 1991-11-06 1993-05-12 Valmet Corporation Procédé et équipement pour garder propre la baguette de couchage et son support dans une coucheuse à baguette, et pour empêcher les fuites d'eau de lubrification et/ou de refroidissement
DE29510486U1 (de) * 1995-06-30 1995-08-17 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Rollrakel-Baugruppe
DE19602483C1 (de) * 1996-01-24 1997-06-05 Voith Sulzer Papiermasch Gmbh Rollrakelbaugruppe
DE19631913A1 (de) * 1996-08-07 1998-02-19 Voith Sulzer Papiermasch Gmbh Auftragwerk zum direkten oder indirekten einseitigen oder beidseitigen Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
EP0906788A2 (fr) * 1997-10-01 1999-04-07 Voith Sulzer Papiertechnik Patent GmbH Dispositif de râclage pour un appareil d'application de produits fluides à pâteux sur un substrat défilant
WO2000063494A1 (fr) * 1999-04-20 2000-10-26 Metso Paper, Inc. Dispositif de couchage
DE102004029565A1 (de) * 2004-06-18 2006-01-05 Voith Paper Patent Gmbh Rakelvorrichtung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076629A1 (fr) * 2009-12-22 2011-06-30 Btg Ipi, Llc Systèmes de verrouillage de lit à tige
EP2341185A1 (fr) * 2009-12-22 2011-07-06 Btg Ipi, Llc Dispositif de mesure et unité de support, support, unité d'insert et insert pour un tel dispositif de mesure
EP2570194A1 (fr) * 2011-09-13 2013-03-20 Horst Sprenger GmbH Système de dosage à racle

Also Published As

Publication number Publication date
EP2103358B1 (fr) 2015-03-25
DE102008000723A1 (de) 2009-09-24

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