EP1761341B1 - Rakelvorrichtung - Google Patents

Rakelvorrichtung Download PDF

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Publication number
EP1761341B1
EP1761341B1 EP05739769A EP05739769A EP1761341B1 EP 1761341 B1 EP1761341 B1 EP 1761341B1 EP 05739769 A EP05739769 A EP 05739769A EP 05739769 A EP05739769 A EP 05739769A EP 1761341 B1 EP1761341 B1 EP 1761341B1
Authority
EP
European Patent Office
Prior art keywords
doctor device
bottom part
top part
holder
tube
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.)
Active
Application number
EP05739769A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1761341A1 (de
Inventor
Christoph Henninger
Horst Kaipf
Eckard Wozny
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 EP1761341A1 publication Critical patent/EP1761341A1/de
Application granted granted Critical
Publication of EP1761341B1 publication Critical patent/EP1761341B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades
    • 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

Definitions

  • the invention relates to a squeegee device for metering and / or leveling a liquid to pasty medium applied to a running surface, the surface being a paper, board or other fibrous web when the medium is directly applied, and the surface of a transfer element for indirect application transfers the medium to the fibrous web.
  • the application layer When applied, the application layer is usually applied in excess and therefore must be doctored to the desired coating weight, i. be dosed. On the other hand, if the application medium is applied at the same time in the desired amount, this is achieved with the doctor device, i. merely to level or equalize with a doctor element mounted in the doctor device.
  • a metering unit or doctor device known from the EP-B1 0 682 728 is a metering unit or doctor device known. It has a receiving part for receiving a rotatable, cylindrical metering rod. In addition, a pressure hose or a plurality of juxtaposed individual tubes are arranged in the interior of the receiving part with the help or the doctor rod is pressed against the surface to be treated. The installation and removal of the hose or the plurality of hoses and the cleaning of the device is complicated and relatively tedious.
  • doctor devices eg DE-A1 295 10 486 .
  • DE-A1 196 19 249 is a required for fixing the doctor device clamping hose firmly in or on a holder or a support body.
  • the clamping hose is exposed to heavy contamination.
  • the clamping hose makes cleaning and total difficult also the holder, which is why it comes in cleaning to longer downtime of a coater.
  • contamination in the doctor blade holder results in the applied coating medium an uneven cross-section.
  • the uneven cross profile leads to unplanned downtimes.
  • the invention has the object to provide an improved doctor blade device that is simpler than previously constructed and assembled and their cleaning is easier.
  • the invention solves the problem by a squeegee device according to the characterizing part of claim 1.
  • a squeegee device according to the characterizing part of claim 1.
  • the squeegee device is constructed in a modular manner, whereby all components susceptible to wear are easily interchangeable.
  • a better flexibility is achieved by variations of clamping and pressure hose, foot and head with respect to material, design, choice of thickness, etc.
  • the modular design allows ideal freedom of design, with different sizes and diameters of the pressure and clamping hose can be selected, whereby a different force and control characteristics is possible
  • a squeegee rod with a small diameter a pressure hose of a smaller dimension and analogous to a large rod diameter associated with a large hose can be realized by simply combining and replacing the components held in readiness.
  • the modular construction according to the invention allows the desired extent diverse combination options between the head and the footboard.
  • a head part can be placed on a same foot part, which has a different size of a receiving surface (rod holder) for another selected metering rod diameter and / or also has a different holder for other geometries and contours of the Anpressschlauches. Optimized service life of the components of the doctor device are thus possible.
  • the foot can be designed differently, which different spring travel, different strengths or capacities are selected.
  • the squeegee device can be installed and removed as a unit in the machine. It can therefore be a very quick change, especially a hose change outside the machine realize. The hoses themselves are less prone to failure.
  • the proposed squeegee device has a clamping hose accommodated in a readily accessible but nevertheless protected holder and a pressure hose, the clamping hose and the pressure hose can in future be removed from the coating machine together with the dosing unit or squeegee device.
  • Said hoses are accommodated in U-shaped brackets, which have only smooth surfaces and as I said, are easily accessible to the outside and on the one hand easier to produce and on the other can be cleaned quickly and thoroughly.
  • the downtime for cleaning the doctor blade holder are thereby considerably reduced.
  • the operational reliability of the coating machine increases, since the cross profile remains uniform as a result of the well-to-clean doctor blade holder Unplanned downtime thus eliminated.
  • the doctor device has in a variant according to the invention a polygonal head part, which has a doctor element in the form of a rotatable circular cylindrical doctor bar and the pressure hose. With the headboard blade-like foot is releasably connected. The foot part has the Clamping hose on.
  • the doctor device can be easily disassembled into the headboard and in the footboard.
  • the structural separation is preferably carried out outside the machine in which the doctor device is installed. This is advantageous for maintenance and assembly / disassembly.
  • the thermal expansion of the head part is advantageously decoupled from the thermal expansion of the foot part. Since the head part heats up strongly in relation to the foot part during operation (by contactless dryers arranged above the fibrous web, which are mostly heated), the thermal expansion of the head part can not be hindered by the decoupling between the head part and the foot part. This ensures a uniform contact pressure of the doctor element against the fibrous web to be coated. Due to the uniform contact pressure of the doctor element, in turn, a uniform transverse profile of a coating medium to be applied is ensured and unilateral wear of the doctor element is avoided. Of course, it is alternatively or additionally possible that materials with different thermal expansion coefficients are used for the head part and the foot part.
  • the head part can have at least one groove into which the foot part engages.
  • Several grooves in each of which an adequate thickening (bead) of the foot engages increase the carrying capacity, especially if larger dimensions of the components are present.
  • the head part and the foot part are positively connected to each other. Due to the positive connection, the head part and the foot part are firmly connected to each other and at the same time the thermal expansion of the headboard and footboard is still decoupled.
  • the thickening which may be preferably carried out as spherical bead, the foot part either snap into the groove of the head part or the foot can be inserted laterally into the head part or its groove or grooves.
  • the foot part can be firmly connected to the head part only at one point, that is to say only with one groove.
  • the head part can expand more than the foot part without being obstructed by the foot part.
  • the solid connection of the headboard and footboard at only one point can be done positively or non-positively.
  • the polygonal head part and the blade-like foot part can be formed in one piece. Then the entire unit can be made from the solid. As a preferred material for this polyethylene comes into question.
  • a first holder for receiving the pressure hose is arranged on the head part.
  • the holder for receiving the Anpressschlauchs may be integrally connected or as a separate component with the headboard.
  • a second holder for receiving the clamping tube is arranged on the foot part, as already described.
  • the holder for receiving the clamping tube may also be formed either integrally with the foot part or be mounted as a separate component on the foot part.
  • the one-piece variants reduce assembly costs. If the holder is a separate component, one and the same component can always be used for the foot part. The holder is then adapted to the clamping hose to be used.
  • the foot and / or headboard and the respective holder be non-positively and / or positively connected with each other for the clamping and / or the pressure hose.
  • Non-positive connections are cheaper, whereas positive connections are easier to maintain, but above all allow free elongation, ie thermal expansion of the head part. This expansion is also made possible by a combination of fixed and floating bearings.
  • Possible connections include screw, weld, rivet, adhesive, press or casting compounds.
  • the clamping tube and its holder may be attached to the lower portion of the clampable in a support body footboard.
  • the lower area should therefore be referred to as a clamping foot.
  • the clamp foot may be made of a thermoplastic, polymer, thermoset (e.g., glass fiber or carbon fiber reinforced plastic), steel or light metal (e.g., aluminum).
  • thermoplastic polymer
  • thermoset e.g., glass fiber or carbon fiber reinforced plastic
  • steel or light metal (e.g., aluminum).
  • the materials can also be the brackets for clamping and Anpressschlauch finished, the materials can be the same or different compared to the head and foot.
  • the invention also relates to a coating machine for applying a liquid to pasty application medium on a running surface, wherein the running surface for direct application, the surface of a paper, cardboard or other fibrous web and indirect application, the surface of a transfer element, such as an applicator roll is that emits the application medium to the fibrous web, which has one or more of claims 1 to 15.
  • the application medium is glue, starch or pigment-containing coating, which can be liquid to pasty.
  • the application itself takes place in an on- or offline coating machine with which the fibrous web is refined during its production.
  • the device according to the invention in particular the design as a so-called modular system means a simple basic structure of the device with very good variation possibilities, good accessibility and optimum cleaning ability.
  • Fig. 1 shows a modular-like doctor device 10 with a head part 11 and a foot part 12.
  • the head part 11 is at the same time a receiving part for a rotatable circular cylindrical metering rod thirteenth
  • a pressure hose 15 is inserted in a first holder 14.
  • the pressure hose 15 presses the head part 11 including the rotatable metering rod 13 accommodated therein against a fibrous web likewise not shown here.
  • a clamping tube 17 is arranged in a second holder 16. Through the clamping tube 17, the doctor device 10 is clamped in a supporting body not shown here and should be referred to with "clamp foot" 40.
  • the pressure hose 15 and the clamping hose 17 are thus both attached to the doctor device 10. Consequently, they can be removed from the support body together with the squeegee device 10 during cleaning operations, so that the squeegee device can be cleaned quickly and thoroughly.
  • the head part 11 and the foot part 12 are positively connected with each other.
  • the head part 11 has, on its lower wall 50, a groove 18 in which a bead 19 attached to the foot part 12 at the upper end engages.
  • the foot part 12 can thus either laterally inserted (from the end faces) into the groove 18 of the head part 11 or snap from below into the groove 18.
  • the head part 11 Since the head part 11 is heated more strongly than the foot part 12 during operation, the head part 11 can expand unimpeded due to the illustrated positive connection with respect to the foot part 12. This ensures a uniform contact pressure of the metering rod 13.
  • the uniform contact pressure of the metering rod 13 ensures a uniform cross-section of a medium applied to the material web provided and at the same time an uneven wear of the metering rod 13 is avoided.
  • the metering rod 13 is seated in a rod receptacle 100, are arranged in the purge channels not shown here, so that the metering rod 13 does not run dry.
  • FIG. 1 shows a similar design for the Anpressschlauch 15 and the clamping tube 17 and a metering rod 13 of small diameter
  • FIG. 1a a possible modification of the building block parts specified.
  • the modified components are here provided with the suffix "a".
  • FIG. 1a a much larger diameter of the metering rod 13, here 13a. Accordingly, the rod holder 100a is also larger than the rod holder 100 from FIG. 1 dimensioned.
  • FIG. 1a In addition, instead of in FIG. 1 shown round tubes, here in each case an oval shaped Anpress-15a, and clamping tube 17a shown.
  • the tubes are taken in the example shown with their height in both brackets 14a and 16a. The rest in FIG. 1a shown, but not numbered components are compared to in FIG. 1 shown embodiment not changed.
  • FIG. 1b another possible modification.
  • the modified components are here provided with the suffix "b".
  • a metering rod 13b again having a relatively small diameter but different sized and shaped pressure hoses, i. Pressing hose 15b and clamping hose 17b has.
  • the pressure hose 15b is oval and the clamping hose 17b is round.
  • a larger metering rod 13a and, for example, the Anpress- and clamping hose 15, 17 are used by itself shape and size. Further variations are conceivable.
  • a squeegee device 20 is shown in which a polygonal head part 21 and a blade-shaped foot part 22 are also positively connected to each other.
  • the foot part 22 has two laterally existing at its upper end beads 29 which engage in grooves 21 mounted on the head part 21.
  • the head part 21 lies with its rear wall 60 flat against the upper part of the foot part 22.
  • the foot part 22 takes over the function of a spiral spring.
  • the head part 21 can expand unhindered when heated relative to the foot part 22.
  • FIG. 3 shows a doctor device 30, in which also a polygonal head part 31 and a blade-like foot part 32 are made in one piece from the solid.
  • a first holder 34 for a pressure hose 35 and a second holder 36 for a clamping hose 37 are mounted as separate components on the doctor device 30. They can thus be dimensioned individually according to the required clamping and contact forces.
  • hose designs 15, 15a, 15b, 25, 35; 17, 17a, 17b, 27, 37 depending on the desired introduction of force, hose stroke or travel (due to different geometry results in a different path-force curve) in any size and shape and the provided first brackets 14, 14a, 14b, 24, 34 and second brackets 16, 16 a, 16 b, 26, 36 - if they are not an integral part of the head or foot part 11, 21, 31 and 12, 22, 32 - against each other.
  • the interchangeability of the metering rod 13, 13a, 13b 23, 33 is given, which can be provided depending on the desired application with smooth or grooved peripheral surface in the diameters 5 to 100 mm, preferably 8 to 40 mm and in the adequately shaped rod holder 100, 100a , 100b of the head part thus formed is interchangeable with another one.
  • combinations in the selection of materials are possible, in particular to influence the thermal characteristics between the "warmer" headboard and the colder foot and headboard.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Beans For Foods Or Fodder (AREA)
  • Polarising Elements (AREA)
  • Cereal-Derived Products (AREA)
  • Clamps And Clips (AREA)
EP05739769A 2004-06-18 2005-05-03 Rakelvorrichtung Active EP1761341B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004029565A DE102004029565A1 (de) 2004-06-18 2004-06-18 Rakelvorrichtung
PCT/EP2005/052007 WO2005123269A1 (de) 2004-06-18 2005-05-03 Rakelvorrichtung

Publications (2)

Publication Number Publication Date
EP1761341A1 EP1761341A1 (de) 2007-03-14
EP1761341B1 true EP1761341B1 (de) 2008-04-16

Family

ID=34966727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05739769A Active EP1761341B1 (de) 2004-06-18 2005-05-03 Rakelvorrichtung

Country Status (8)

Country Link
US (1) US8418645B2 (ja)
EP (1) EP1761341B1 (ja)
JP (1) JP4781353B2 (ja)
CN (1) CN100475362C (ja)
AT (1) ATE392267T1 (ja)
DE (2) DE102004029565A1 (ja)
ES (1) ES2306138T3 (ja)
WO (1) WO2005123269A1 (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011112956A1 (de) 2011-09-13 2013-03-14 Horst Sprenger Gmbh Rakel-Dosiersystem
US8418645B2 (en) 2004-06-18 2013-04-16 Voith Patent Gmbh Doctor device
DE102022105636A1 (de) 2022-03-10 2023-09-14 Voith Patent Gmbh Rakeldosiervorrichtung
DE102022112542A1 (de) 2022-05-19 2023-11-23 Voith Patent Gmbh Vorrichtung, Verwendung und Verfahren zum Dosieren oder Egalisieren
WO2023222299A1 (de) 2022-05-19 2023-11-23 Voith Patent Gmbh Vorrichtung, verwendung und verfahren zum dosieren oder egalisieren
DE102022126270A1 (de) 2022-10-11 2024-04-11 Voith Patent Gmbh Vorrichtung, Verwendung und Verfahren zum Dosieren oder Egalisieren

Families Citing this family (8)

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US20090202846A1 (en) * 2008-02-08 2009-08-13 Mohan Jayaraman Thermally adaptive surfaces for receiving thermal sprays
DE102008000723A1 (de) * 2008-03-18 2009-09-24 Voith Patent Gmbh Rakelvorrichtung
DE102009026495A1 (de) 2009-05-27 2010-12-02 Voith Patent Gmbh Rakelvorrichtung
DE102010030804A1 (de) 2010-07-01 2012-01-05 Voith Patent Gmbh Druckschlauch
DE102010031470A1 (de) 2010-07-16 2012-01-19 Voith Patent Gmbh Rakelvorrichtung
CN105728256A (zh) * 2016-04-29 2016-07-06 玖龙纸业（太仓）有限公司 一种涂布灰底白板纸生产装置及生产方法
DE102022105518B4 (de) 2022-03-09 2024-03-21 Voith Patent Gmbh Auftragsdüse, Auftragswerk und Verfahren
DE102022105510B4 (de) 2022-03-09 2024-01-04 Voith Patent Gmbh Auftragsdüse, Auftragswerk und Verfahren

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8418645B2 (en) 2004-06-18 2013-04-16 Voith Patent Gmbh Doctor device
DE102011112956A1 (de) 2011-09-13 2013-03-14 Horst Sprenger Gmbh Rakel-Dosiersystem
EP2570194A1 (de) 2011-09-13 2013-03-20 Horst Sprenger GmbH Rakel-Dosiersystem
DE102022105636A1 (de) 2022-03-10 2023-09-14 Voith Patent Gmbh Rakeldosiervorrichtung
DE102022112542A1 (de) 2022-05-19 2023-11-23 Voith Patent Gmbh Vorrichtung, Verwendung und Verfahren zum Dosieren oder Egalisieren
WO2023222299A1 (de) 2022-05-19 2023-11-23 Voith Patent Gmbh Vorrichtung, verwendung und verfahren zum dosieren oder egalisieren
DE102022126270A1 (de) 2022-10-11 2024-04-11 Voith Patent Gmbh Vorrichtung, Verwendung und Verfahren zum Dosieren oder Egalisieren

Also Published As

Publication number Publication date
CN1997459A (zh) 2007-07-11
CN100475362C (zh) 2009-04-08
US20070113780A1 (en) 2007-05-24
ATE392267T1 (de) 2008-05-15
JP4781353B2 (ja) 2011-09-28
DE102004029565A1 (de) 2006-01-05
WO2005123269A1 (de) 2005-12-29
ES2306138T3 (es) 2008-11-01
DE502005003758D1 (de) 2008-05-29
US8418645B2 (en) 2013-04-16
JP2008502467A (ja) 2008-01-31
EP1761341A1 (de) 2007-03-14

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