EP1748852B1 - Doctor blade holder - Google Patents
Doctor blade holder Download PDFInfo
- Publication number
- EP1748852B1 EP1748852B1 EP05733530A EP05733530A EP1748852B1 EP 1748852 B1 EP1748852 B1 EP 1748852B1 EP 05733530 A EP05733530 A EP 05733530A EP 05733530 A EP05733530 A EP 05733530A EP 1748852 B1 EP1748852 B1 EP 1748852B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insert part
- doctor bed
- bed according
- doctor
- respective insert
- 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.)
- Not-in-force
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Classifications
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- 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
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- 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
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- 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 doctor bed for pressing a rotating doctor bar against a roll is known, such as an applicator roll or coating roll in paper machines, wherein the doctor bed is designed as a profile strip which supports the doctor bar elastically in the pressing direction.
- the doctor bed is made of an elastomeric polyurethane material blended with at least 3 percent by weight ultra high molecular weight polyethylene. The addition of an ultra-high molecular weight polyethylene should be achieved in terms of lubricity and abrasion resistance longer life.
- US Pat. No. 6,019,846 A describes a doctor bed which has radial longitudinal strips of non-metallic material between the doctor bed and the doctor bar.
- transitions of the individual material combinations which can have greatly differing mechanical properties in the base material of the doctor bed and in an insert part, also play a special role.
- a homogeneous transition of the materials used for an insert part and the rest of the profile strip is formed by the component geometry of the respective insert part. As a result, a homogeneous and soft transition of different materials can be created.
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- Paper (AREA)
- Coating Apparatus (AREA)
- Ladders (AREA)
- Soil Working Implements (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
Description
Die Erfindung betrifft ein Rakelbett, ausgebildet als Profilleiste mit einer in axialer Richtung durchlaufenden Nut zur Aufnahme eines drehbaren Rakelstabs, der gegen eine laufende Oberfläche anpressbar ist und auf die laufende Oberfläche aufgebrachtes flüssiges bis pastöses Medium dosiert und/oder egalisiert, wobei die laufende Oberfläche bei direktem Auftrag des Mediums eine Seite einer Papier-, Karton- oder anderen Faserstoffbahn ist und bei indirektem Auftrag die Oberfläche eines Übertragungselementes ist, welches das Medium an die Faserstoffbahn überträgt.The invention relates to a doctor bed, designed as a profiled strip with a continuous groove in the axial direction for receiving a rotary metering rod which can be pressed against a running surface and metered onto the running surface liquid to pasty medium and / or leveled, the current surface at direct order of the medium is one side of a paper, cardboard or other fibrous web and, in the case of indirect application, is the surface of a transfer element which transfers the medium to the fibrous web.
Rakelbetten dienen der Lagerung und Abstützung von kreiszylindrischen Rakelstäben, die zum Dosieren und/oder Egalisieren eines auf einen laufenden Untergrund aufgebrachten flüssigen bis pastösen Mediums innerhalb von sogenannten Streichmaschinen Verwendung finden. Die Rakelstäbe werden üblicherweise aus einem homogenen Werkstoff hergestellt. Dabei sind sehr lange und schlanke zylindrische Rakelstäbe bei geringen bis hohen Drehzahlen zu haltern, während diese das Beschichtungsmaterial möglichst gleichmäßig aufbringen, abstreifen oder nur verteilen. Der Einsatz solcher Rakelstäbe ist verschleißträchtig. Das Auswechseln der sehr teuren Stäbe ist dann mit Arbeitsaufwand und Betriebsausfall verbunden. Auch die Rakelbetten sind aufgrund von Verschleiß regelmäßig zu erneuern. Die Standfestigkeit des Rakelbetts ist somit begrenzt, welches den Stab über seine gesamte Länge hochgenau und gleichmäßig andrücken soll. Dazu benötigt das Rakelbett eine Eigenelastizität und gleichzeitig eine möglichst gute Gleitfähigkeit und Abriebfestigkeit. Üblicherweise wird das Rakelbett über innere Kanäle oder Profilkammern mit Wasser unter entsprechendem Druck beaufschlagt, so dass derDoctor beds are used for the storage and support of circular cylindrical doctor bars, which are used for dosing and / or leveling a liquid applied to a running surface liquid to pasty medium within so-called coating machines. The doctor bars are usually made of a homogeneous material. In this case, very long and slender cylindrical doctor bars are to be supported at low to high speeds, while these apply the coating material as evenly as possible, strip or only distribute. The use of such doctor bars is susceptible to wear. The replacement of the very expensive rods is then associated with labor and operation failure. Also, the squeegee beds are to be renewed regularly due to wear. The stability of the doctor bed is thus limited, which is to press the rod over its entire length with high precision and uniformity. For this, the doctor bed requires an inherent elasticity and at the same time the best possible lubricity and abrasion resistance. Usually, the doctor bed is acted upon by inner channels or profile chambers with water under a corresponding pressure, so that the
Rakelstab eine schwimmende Lagerung im Rakelbett erhält. Insbesondere moderne, mit einer Profilierung versehene Rakelstäbe, die eine bessere Auftragsdosierung schaffen, nutzen die Rakelbetten in Bereichen mit hohem Abstützungsdruck besonders ab.Doctor blade receives a floating storage in the doctor bed. In particular, modern profiled doctoring rods that provide better application dosage utilize the doctor beds particularly in areas of high support pressure.
Aus der DE 101 20 786 A1 ist ein Rakelbett zum Andruck eines rotierenden Rakelstabs gegen eine Walze bekannt, wie etwa eine Auftragswalze oder Beschichtungswalze in Papiermaschinen, wobei das Rakelbett als Profilleiste ausgebildet ist, die den Rakelstab elastisch in Andruckrichtung abstützt. Das Rakelbett besteht aus einem elastomeren Polyurethanmaterial, das mit einem Anteil von zumindest 3 Gewichtsprozenten mit ultrahochmolekularem Polyäthylen gemischt ist. Durch die Beimischung eines ultrahochmolekularen Polyäthylens sollen hinsichtlich der Gleitfähigkeit und Abriebfestigkeit längere Standzeiten erzielt werden.From DE 101 20 786 A1 a doctor bed for pressing a rotating doctor bar against a roll is known, such as an applicator roll or coating roll in paper machines, wherein the doctor bed is designed as a profile strip which supports the doctor bar elastically in the pressing direction. The doctor bed is made of an elastomeric polyurethane material blended with at least 3 percent by weight ultra high molecular weight polyethylene. The addition of an ultra-high molecular weight polyethylene should be achieved in terms of lubricity and abrasion resistance longer life.
Des Weiteren ist in der DE 43 34 555 A1 eine Halterung für eine Rakelstange beschrieben, welche ein die Rakelstange haltendes Rakelbett aufweist, das in einem an einer Seite offenen Halter in Richtung der Halteröffnung bewegbar gelagert ist. Zwischen Halter und Rakelbett ist ein elastischer, in Richtung der Halteröffnung drückender Druckschlauch angeordnet. Um einen in seiner Weite präzisen und über die Arbeitsbreite gleichmäßigen Spalt zwischen Rakelstange und einer Walze einstellen zu können, ist ein weiterer, in Gegenrichtung drückender Druckschlauch vorgesehen. Durch die jeweilige Beaufschlagung der Druckschläuche soll sich das Querprofil unabhängig vom Anpressdruck mit einer fein einstellbaren Profiliereinrichtung einstellen lassen.Furthermore, DE 43 34 555 A1 describes a holder for a doctor bar, which has a doctor bed holding the doctor bar which is movably mounted in a holder open on one side in the direction of the holder opening. Between the holder and the doctor bed an elastic, in the direction of the holder opening oppressive pressure hose is arranged. In order to be able to set a gap which is precise in its width and uniform over the working width between the doctor bar and a roller, a further pressure hose which presses in the opposite direction is provided. By the respective admission of the pressure hoses, the cross profile should be adjusted independently of the contact pressure with a finely adjustable profiling.
In der US 6,019,846 A ist ein Rakelbett beschrieben, welches radiale Längsstreifen aus nichtmetallischem Material zwischen Rakelbett und Rakelstab aufweist.US Pat. No. 6,019,846 A describes a doctor bed which has radial longitudinal strips of non-metallic material between the doctor bed and the doctor bar.
Diese Lösung ist sehr aufwändig und kann hinsichtlich der Gleitfähigkeit und Verschleißfestigkeit nicht überzeugen.This solution is very complex and can not convince in terms of lubricity and wear resistance.
Bei den vorgeschlagenen Lösungen treten jedoch über die gesamte Länge einer Rakelvorrichtung zonar unterschiedliche Verschleißerscheinungen auf oder stellen bezüglich des Anpressdrucks zwar steuerbare, technisch jedoch sehr aufwändige Lösungen dar.In the proposed solutions, however, occur over the entire length of a doctor device zonar different signs of wear or make with respect to the contact pressure while controllable, but technically very complex solutions.
Des Weiteren können sich Probleme bei einer ungleichen Belastung dadurch ergeben, dass sich ein erhöhter Verschleiß durch eine partielle Deformation, beispielsweise im Randbereich der Papierbahn, aufgrund ungenügender Schmierung, Faserablagerungen vom Papierbahnrand, ungünstiger Reibungsverhältnisse im Übergang von Beschichtungsmaterial zur Randbefeuchtung oder partiellem Trockenlauf einstellt.Furthermore, problems with unequal loading can thereby result result in increased wear due to partial deformation, for example in the edge region of the paper web, due to insufficient lubrication, fiber deposits from the paper web edge, unfavorable friction conditions in the transition from coating material to edge moistening or partial dry running.
Der Erfindung liegt die Aufgabe zugrunde, ein Rakelbett so weiterzubilden, dass es über seine gesamte Länge eine im Verschleißverhalten gleichmäßige Abnutzung aufweist.The invention has the object of developing a doctor bed so that it has a uniform wear behavior over its entire length.
Diese Aufgabe wird durch ein Rakelbett nach Anspruch 1 gelöst.This object is achieved by a doctor bed according to
Erfindungsgemäß ist ein Rakelbett vorgesehen, ausgebildet als Profilleiste mit einer in axialer Richtung durchlaufenden Nut zur Abstützung eines Rakelstabs in Andruckrichtung, wobei das Rakelbett abschnittsweise in axialer Richtung durch wenigstens ein Einsatzteil gebildet ist, das in Bezug zum übrigen Werkstoff formbeständiger ist.According to the invention, a doctor bed is provided, formed as a profiled strip with a continuous groove in the axial direction for supporting a metering rod in the pressing direction, wherein the doctor bed is formed in sections in the axial direction by at least one insert part, which is dimensionally stable in relation to the rest of the material.
Die Erfindung schlägt ein relativ kurzes Bauteil vor, das jeweils im kritischen Bereich eingefügt ist und dabei die für einen Betrieb erforderliche Eigenelastizität der gesamten Rakelvorrichtung bewahrt.The invention proposes a relatively short component which is inserted in each case in the critical region and thereby preserves the inherent elasticity of the entire doctor device required for operation.
Durch die entsprechende Eigenelastizität wird ein in der Nut angeordneter Rakelstab in Andruckrichtung, also in Richtung des zu beschichtenden laufenden Untergrundes, beispielsweise einer Auftragswalze einer Streichmaschine, flexibel abgestützt. Ein Einsatzteil ist oder mehrere Einsatzteile sind entlang der axialen Richtung im Rakelbett eingebunden und insbesondere an Stellen angeordnet, an denen bei herkömmlichen Rakelbetten besonders hoher Verschleiß auftritt. Ein besonderer Vorteil ist der durch die erfindungsgemäße Lösung erzielte geringe Abrieb oder Verschleiß und ein niedriger Reibungskoeffizient der verwendeten Materialien, die zu einer erhöhten Standzeit des Rakelbetts führen.By means of the corresponding inherent elasticity, a doctor blade arranged in the groove is flexibly supported in the direction of pressure, ie in the direction of the running substrate to be coated, for example an applicator roll of a coating machine. An insert part or several insert parts are integrated along the axial direction in the doctor bed and in particular arranged at locations where particularly high wear occurs in conventional doctor beds. A particular advantage is the low abrasion or wear achieved by the solution according to the invention and a low coefficient of friction of the materials used, which lead to an increased service life of the doctor bed.
Es können dabei mehrere kritische Zonen mit erhöhtem Verschleiß vorhanden sein. Ein besonderer Vorteil der Erfindung ergibt sich durch die Verwendung der im Verschleißverhalten aufeinander abgestimmten Werkstoffe, beispielsweise mit gummielastischen Werkstoffen als Grundmaterial in Verbindung mit entsprechend form- und abriebbeständigen Einsatzteilen. Damit weist das Rakelbett über seine gesamte Länge eine im Verschleißverhalten gleichmäßige Abnutzung auf. Für ein Einsatzteil - auch als Insert bezeichnet - kommen günstig aufeinander abgestimmte hitzebeständige, formbeständige, abriebbeständige und reibungsarme Werkstoffe in Betracht.There may be several critical zones with increased wear. A particular advantage of the invention results from the use of matched in wear behavior materials, such as rubber-elastic materials as base material in conjunction with correspondingly form and abrasion resistant inserts. Thus, the doctor bed over its entire length on wear uniform wear on. For an insert - also known as an insert - are low-matching heat-resistant, dimensionally stable, abrasion-resistant and low-friction materials into consideration.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, dass sich mehrere Einsatzteile in axialer Richtung im Außenbereich befinden. Es ist aber auch möglich, dass nur ein Einsatzteil bevorzugt in der Mitte angeordnet ist und/oder in der Mitte angeordnet sind. Partiell wird also ein Einsatzteil in einem kritischen Bereich angeordnet, um eine partielle Deformation, beispielsweise im Randbereich einer Papierbahn, aufgrund ungenügender Schmierung, Faserablagerungen oder ungünstige Reibungsverhältnisse auszugleichen. Hierdurch werden die eingangs erwähnten Probleme, die sich aus einer ungleichen Belastung ergeben behoben.An advantageous embodiment of the invention provides that several inserts are located in the axial direction in the outdoor area. But it is also possible that only one insert is preferably arranged in the middle and / or arranged in the middle. Partially so an insert is placed in a critical area to compensate for a partial deformation, for example, in the edge region of a paper web, due to insufficient lubrication, fiber deposits or unfavorable friction conditions. As a result, the above-mentioned problems resulting from an uneven load are resolved.
Eine besondere Rolle spielen auch die Übergänge der einzelnen Materialkombinationen, die im Grundmaterial des Rakelbetts und einem Einsatzteil stark unterschiedliche mechanische Eigenschaften aufweisen können. In bevorzugter Ausführungsform wird durch die Bauteilgeometrie des jeweiligen Einsatzteils ein homogener Übergang der für ein Einsatzteil und der übrigen Profilleiste verwendeten Werkstoffe ausgebildet. Hierdurch kann ein homogener und weicher Übergang unterschiedlicher Materialien geschaffen werden.The transitions of the individual material combinations, which can have greatly differing mechanical properties in the base material of the doctor bed and in an insert part, also play a special role. In a preferred embodiment, a homogeneous transition of the materials used for an insert part and the rest of the profile strip is formed by the component geometry of the respective insert part. As a result, a homogeneous and soft transition of different materials can be created.
Vorteilhafterweise sind die gemeinsamen Berührungsflächen des jeweiligen Einsatzteils mit dem umgebenden Werkstoff im Wesentlichen unter einem Winkel von 45°-90°, bevorzugt unter 70°-90°, bezüglich der axialen Richtung angeordnet. Diese Anordnung ergibt einen harmonischeren Übergang der unterschiedlichen Werkstoffe. Im Wesentlichen bedeutet in diesem Zusammenhang, dass aus geometrischen Gründen bei der konstruktiven Auslegung der Einsatzteile natürlich auch andere Flächenorientierungen auftreten können. Diese Orientierungen sollen jedoch einen untergeordneten Einfluss auf die Elastizität des Rakelbetts und insbesondere auf die Art und Weise eines fließenden Übergangs der Krafteinleitung auf einen Rakelstab besitzen.Advantageously, the common contact surfaces of the respective insert part are arranged with the surrounding material substantially at an angle of 45 ° -90 °, preferably below 70 ° -90 °, with respect to the axial direction. This arrangement results in a more harmonious transition of the different ones Materials. Essentially, in this context means that for geometric reasons in the structural design of the inserts, of course, other surface orientations may occur. However, these orientations should have a minor influence on the elasticity of the doctor bed and in particular on the way of a smooth transition of the introduction of force on a metering rod.
Beim Auftragen eines flüssigen oder pastösen Mediums, be ispielsweise auf eine laufende Materialbahn aus Papier oder Karton, können beträchtliche Temperaturen auftreten, die auch Rakelvorrichtungen in ihrer Funktionsweise beeinträchtigen können. In bevorzugter Ausführungsform ist dazu das jeweilige Einsatzteil hitzebeständig.When applying a liquid or pasty medium, be ispielsweise on a moving web of paper or cardboard, considerable temperatures can occur, which can affect the functioning of doctor blades devices. In a preferred embodiment, the respective insert part is heat-resistant for this purpose.
Beispielsweise bei Rollrakeleinrichtungen übernehmen die Rakelbetten die Führungs- und Stützfunktion für die drehbar gelagerten Rakelstäbe. Diese sollten durch möglichst gleitfähiges Material geführt werden, das jedoch noch weitere Anforderungen bezüglich ausreichend langer Standzeiten der Vorrichtung erfüllen soll. In bevorzugter Ausführungsform ist dazu das jeweilige Einsatzteil verschleißbeständig.For example, in roll doctor devices, the doctor beds take over the guiding and supporting function for the rotatably mounted metering rods. These should be guided by material that is as slippery as possible, but which should fulfill further requirements with regard to a sufficiently long service life of the device. In a preferred embodiment, the respective insert part is wear-resistant for this purpose.
Vorteilhafterweise besteht das jeweilige Einsatzteil aus Thermoplast. Insbesondere vorteilhaft ist ein Einsatzteil aus Polyethylen (PE) oder hochfestem Polyetheretherketon (PEEK) durch eine entsprechend hohe Zähigkeit der Materialien. Hierdurch wird zum übrigen Grundmaterial bezüglich der Elastizität des Rakelbetts bereits durch die Werkstoffauswahl ein homogener Übergang über die gesamte Länge des Rakelbetts geschaffen. Der Thermoplast wird jedoch bevorzugt so ausgewählt, dass dieser bei Erwärmung dennoch starrer bleibt, als das Grundmaterial.Advantageously, the respective insert is made of thermoplastic. Particularly advantageous is an insert made of polyethylene (PE) or high-strength polyetheretherketone (PEEK) by a correspondingly high toughness of the materials. As a result, a homogeneous transition over the entire length of the doctor bed is already created by the material selection for the rest of the base material with respect to the elasticity of the doctor bed. However, the thermoplastic is preferably selected so that it remains more rigid when heated than the base material.
Alternativ kann vorteilhafterweise auch das jeweilige Einsatzteil aus Polymeren bestehen, beispielsweise aus Polyurethan (PU) oder Polyamid (PA). Hierzu eignet sich insbesondere das Elastomer wie Polyurethan(PU), da es bezüglich seiner mechanischen Eigenschaften gummielastisch bis hart sein kann und dabei abriebfest ist. Polyamid (PA) ist dagegen außer seiner Abriebfestigkeit vergleichsweise hart.Alternatively, advantageously, the respective insert made of polymers, for example polyurethane (PU) or polyamide (PA). For this purpose, in particular the elastomer such as polyurethane (PU), since it is in terms of its mechanical properties can be rubber-elastic to hard and abrasion resistant. Polyamide (PA), in contrast to its abrasion resistance, is comparatively hard.
Alternativ kann vorteilhafterweise das jeweilige Einsatzteil aus einem Werkstoffverbund bestehen. Insbesondere kann vorteilhafterweise das Einsatzteil aus einem Werkstoffverbund aus Gummi und Graphit aufgebaut sein.Alternatively, advantageously, the respective insert part consist of a composite material. In particular, advantageously, the insert can be constructed of a composite material of rubber and graphite.
Alternativ kann vorteilhafterweise auch das jeweilige Einsatzteil aus Keramik bestehen. Hierdurch wird ein besonders form- und verschleißbeständiges Einsatzteil im Rakelbett geschaffen.Alternatively, advantageously, the respective insert made of ceramic. As a result, a particularly form-and wear-resistant insert is created in the doctor bed.
Alternativ kann vorteilhafterweise auch das jeweilige Einsatzteil aus Metall bestehen. Metalle aus einer Kupferlegierung, beispielsweise aus Bronze, eignen sich hierzu besonders gut. Bronze als Werkstoff zeichnet sich auch als besonders korrosionsbeständig aus.Alternatively, advantageously, the respective insert made of metal. Metals made of a copper alloy, for example bronze, are particularly suitable for this purpose. Bronze as a material is also particularly resistant to corrosion.
In bevorzugter Ausführungsform ist das jeweilige Einsatzteil formschlüssig, geklebt, geschraubt, genietet, eingepresst, eingegossen oder eingeschweißt. Je nach Einsatzbereich kann das jeweils günstige Fügeverfahren im Hinblick auf die mechanische Beanspruchung des Rakelbetts im Betrieb ausgewählt werden.In a preferred embodiment, the respective insert part is positively, glued, screwed, riveted, pressed, cast or welded. Depending on the application, the respectively favorable joining method can be selected with regard to the mechanical stress of the doctor bed during operation.
Weitere Vorteile, Besonderheiten und zweckmäßige Weiterbildungen der Erfindung ergeben sich aus den weiteren Unteransprüchen oder deren Unterkombinationen.Further advantages, features and expedient developments of the invention will become apparent from the other dependent claims or their sub-combinations.
Nachfolgend wird die Erfindung anhand der Zeichnungen weiter erläutert. Im Einzelnen zeigt die schematische Darstellung in:
- Fig. 1
- eine Ansicht eines Rakelbetts mit Einsatzteil am Rand,
- Fig. 2
- eine Ansicht eines Rakelbetts mit einem mittig angeordneten Einsatzteil, und
- Fig. 3
- eine Ansicht eines Rakelbetts mit einem durch Formschluss gehalterten Einsatzteil.
- Fig. 1
- a view of a doctor bed with insert at the edge,
- Fig. 2
- a view of a doctor bed with a centrally located Insert part, and
- Fig. 3
- a view of a doctor bed with a form-fitting content held insert.
Die in den Figuren gleichen Bezugsziffern bezeichnen gleiche oder gleich wirkende Elemente.The same reference numerals in the figures designate the same or equivalent elements.
In
- 11
- Rakelbettdoctor bed
- 22
- Rakelstabdoctor bar
- 33
- Nutgroove
- 44
- Einsatzteilinsert
Claims (15)
- Doctor bed (1), formed as a profiled strip having a continuous groove (3) in the axial direction to hold a rotatable metering rod (2), which can be pressed against a moving surface and meters and/or evens out liquid to pasty medium applied to the moving surface, the moving surface in the case of direct application of the medium being one side of a paper, board or other fibrous web and in the case of indirect application being the surface of a transfer element which transfers the medium to the fibrous web,
characterized in that
the doctor bed is formed in the axial direction in some sections by at least one insert part (4) which is more wear-resistant and/or heat-resistant in relation to the remaining material of the doctor bed. - Doctor bed according to Claim 1, characterized in that an insert part (4) is arranged in the center or a plurality of insert parts (4) are arranged in the external region and/or in the center in the axial direction.
- Doctor bed according to Claim 1 or 2,
characterized in that a component geometry of the respective insert part (4) is chosen such that there is a homogeneous transition between the materials used for an insert part and the remaining profiled strip. - Doctor bed according to Claim 3, characterized in that common contact surfaces of the respective insert part (4) with the surrounding material are arranged substantially at an angle of 45°-90°, preferably 70°-90°, with respect to the axial direction.
- Doctor bed according to one of Claims 1 to 4, characterized in that the respective insert part (4) has a high capacity to slide.
- Doctor bed according to one of Claims 1 to 5, characterized in that the respective insert part (4) has a stabler shape.
- Doctor bed according to one of Claims 1 to 6, characterized in that the respective insert part (4) consists of thermoplastics.
- Doctor bed according to Claim 7, characterized in that the respective insert part (4) consists of polyethylene or high-strength polyether ether ketone (PEEK) .
- Doctor bed according to one of Claims 1 to 6, characterized in that the respective insert part (4) consists of polyurethane or polyamide.
- Doctor bed according to one of Claims 1 to 6, characterized in that the respective insert part (4) consists of a material composite.
- Doctor bed according to Claim 10, characterized in that the material composite of an insert part (4) is formed of rubber and graphite.
- Doctor bed according to one of Claims 1 to 6, characterized in that the respective insert part (4) consists of ceramic.
- Doctor bed according to one of Claims 1 to 6, characterized in that the respective insert part (4) consists of metal.
- Doctor bed according to Claim 13, characterized in that the respective insert part (4) consists of a copper alloy, for example of bronze.
- Doctor bed according to one of Claims 1 to 14, characterized in that the respective insert part (4) is form-fitting, adhesively bonded, screwed, riveted, pressed in, cast in or welded in.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004024079A DE102004024079A1 (en) | 2004-05-14 | 2004-05-14 | doctor bed |
| PCT/EP2005/051640 WO2005110621A1 (en) | 2004-05-14 | 2005-04-14 | Doctor blade holder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1748852A1 EP1748852A1 (en) | 2007-02-07 |
| EP1748852B1 true EP1748852B1 (en) | 2008-10-08 |
Family
ID=34964586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05733530A Not-in-force EP1748852B1 (en) | 2004-05-14 | 2005-04-14 | Doctor blade holder |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20070131163A1 (en) |
| EP (1) | EP1748852B1 (en) |
| JP (1) | JP4672721B2 (en) |
| CN (1) | CN100441319C (en) |
| AT (1) | ATE410242T1 (en) |
| BR (1) | BRPI0510199B1 (en) |
| DE (2) | DE102004024079A1 (en) |
| WO (1) | WO2005110621A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005020848A1 (en) | 2005-05-02 | 2006-11-09 | Voith Patent Gmbh | doctor bed |
| US8028648B2 (en) * | 2005-12-02 | 2011-10-04 | Metso Paper, Inc. | Rod cradle, instert to be used in a rod cradle, and method for inserting a rod in a rod cradle |
| JP2008136884A (en) * | 2006-11-29 | 2008-06-19 | Fujifilm Corp | Bar coating device and its method |
| DE102018207012A1 (en) * | 2017-05-31 | 2018-12-06 | Heidelberger Druckmaschinen Ag | paintbox |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2702730A (en) * | 1952-02-12 | 1955-02-22 | Hayward Tyler And Company Ltd | Bearing |
| GB1183579A (en) * | 1966-08-31 | 1970-03-11 | Davy & United Eng Co Ltd | Rolling Mills |
| AT319734B (en) * | 1971-10-13 | 1975-01-10 | Feldmuehle Anlagen Prod | PRIOR TO PAINTING RAIL-SHAPED GOODS |
| US4143995A (en) * | 1975-05-15 | 1979-03-13 | Dropsa S.P.A. | Single drive motor device particularly to supply fluid conveyance tandem line systems |
| DE3022955C2 (en) * | 1980-06-19 | 1982-12-16 | Jagenberg-Werke AG, 4000 Düsseldorf | Device for regulating the application thickness when coating moving material webs |
| US4357249A (en) * | 1980-09-11 | 1982-11-02 | Arguto, Inc. | Self-lubricating bearing and the like, and method of making same |
| US4508050A (en) * | 1983-12-22 | 1985-04-02 | Tittmann Frederick R | Doctor apparatus for coating machine |
| NZ210422A (en) * | 1984-12-04 | 1988-09-29 | Rockall France Sa Ste Nle | Plunger depressed contacts connect with concentric conductive rings |
| US4798771A (en) * | 1985-08-27 | 1989-01-17 | Intercal Company | Bearings and other support members made of intercalated graphite |
| JPS63176289A (en) * | 1987-01-14 | 1988-07-20 | 日立エレベ−タサ−ビス株式会社 | Safety device for man conveyor |
| US4768366A (en) * | 1987-04-30 | 1988-09-06 | Tadeusz Sendzimir | Wide strip mill using pressure elements |
| DE4309002A1 (en) * | 1993-03-20 | 1994-09-22 | Voith Gmbh J M | Dosing device for coating running webs, preferably made of paper or cardboard |
| DE4334555C2 (en) * | 1993-10-11 | 2003-06-26 | Jagenberg Papiertech Gmbh | Mount for a squeegee rod |
| DK0851908T3 (en) * | 1995-06-07 | 2003-08-25 | Lee County Mosquito Control Di | Lubricant composition and method |
| DE29510486U1 (en) * | 1995-06-30 | 1995-08-17 | Voith Sulzer Papiermasch Gmbh | Squeegee assembly |
| US6019513A (en) * | 1995-07-11 | 2000-02-01 | Nsk Ltd. | Sealing device for linear guide apparatus |
| US6019846A (en) * | 1997-12-16 | 2000-02-01 | Voith Sulzer Paper Technology North America, Inc. | Coater rod bed |
| DE19827712B4 (en) * | 1998-06-22 | 2008-12-11 | Voith Patent Gmbh | Device for direct or indirect application of a liquid or pasty application medium to a moving material web |
| FI106139B (en) * | 1999-03-26 | 2000-11-30 | Valmet Corp | Stavskavare |
| DE19934441A1 (en) * | 1999-07-22 | 2001-01-25 | Voith Paper Patent Gmbh | Device for direct or indirect application of a liquid or pasty application medium to a running material web, in particular made of paper or cardboard |
| DE10024370A1 (en) * | 2000-05-17 | 2001-11-22 | Roland Man Druckmasch | Device for surface processing of printed sheets includes first and second axially parallel rollers and heater for heating printed sheet in area of rolling gap between the two rollers |
| DE10141514A1 (en) * | 2000-08-25 | 2002-08-08 | Fuji Photo Film Co Ltd | Rod coating method and device |
| DE10045515B4 (en) * | 2000-09-13 | 2011-02-10 | Horst Sprenger Gmbh | Squeegee metering |
| US6572269B2 (en) * | 2000-11-30 | 2003-06-03 | Nsk Ltd. | Bearing apparatus |
| US6815008B2 (en) * | 2001-09-13 | 2004-11-09 | Fuji Photo Film Co., Ltd. | Bar coating apparatus and bar coating method |
| US6854351B2 (en) * | 2001-11-14 | 2005-02-15 | Nsk Ltd. | Linear motion device, rolling device and separator for rolling device |
| DE10226266B4 (en) * | 2002-06-07 | 2005-09-15 | Ks Gleitlager Gmbh | Plain bearing composite material |
| FI119390B (en) * | 2003-12-22 | 2008-10-31 | Metso Paper Inc | The rod cradle for a film, coating or dam |
| DE102004028755A1 (en) * | 2004-06-16 | 2006-01-12 | Voith Paper Patent Gmbh | applicator |
| DE102004028754A1 (en) * | 2004-06-16 | 2006-01-05 | Voith Paper Patent Gmbh | doctor bed |
| DE102005020848A1 (en) * | 2005-05-02 | 2006-11-09 | Voith Patent Gmbh | doctor bed |
-
2004
- 2004-05-14 DE DE102004024079A patent/DE102004024079A1/en not_active Withdrawn
-
2005
- 2005-04-14 AT AT05733530T patent/ATE410242T1/en active
- 2005-04-14 JP JP2007512147A patent/JP4672721B2/en not_active Expired - Fee Related
- 2005-04-14 CN CNB2005800154884A patent/CN100441319C/en not_active Expired - Fee Related
- 2005-04-14 DE DE502005005627T patent/DE502005005627D1/en active Active
- 2005-04-14 EP EP05733530A patent/EP1748852B1/en not_active Not-in-force
- 2005-04-14 BR BRPI0510199-9A patent/BRPI0510199B1/en not_active IP Right Cessation
- 2005-04-14 WO PCT/EP2005/051640 patent/WO2005110621A1/en active Application Filing
-
2006
- 2006-11-14 US US11/559,517 patent/US20070131163A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005110621A1 (en) | 2005-11-24 |
| JP2007537033A (en) | 2007-12-20 |
| ATE410242T1 (en) | 2008-10-15 |
| CN100441319C (en) | 2008-12-10 |
| BRPI0510199A (en) | 2008-03-04 |
| JP4672721B2 (en) | 2011-04-20 |
| BRPI0510199B1 (en) | 2018-02-14 |
| US20070131163A1 (en) | 2007-06-14 |
| EP1748852A1 (en) | 2007-02-07 |
| CN1976762A (en) | 2007-06-06 |
| DE502005005627D1 (en) | 2008-11-20 |
| DE102004024079A1 (en) | 2005-12-08 |
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