EP1026313B1 - Band for making a web material - Google Patents

Band for making a web material Download PDF

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Publication number
EP1026313B1
EP1026313B1 EP99123453A EP99123453A EP1026313B1 EP 1026313 B1 EP1026313 B1 EP 1026313B1 EP 99123453 A EP99123453 A EP 99123453A EP 99123453 A EP99123453 A EP 99123453A EP 1026313 B1 EP1026313 B1 EP 1026313B1
Authority
EP
European Patent Office
Prior art keywords
reinforcements
band according
dimensional structure
band
filler material
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.)
Expired - Lifetime
Application number
EP99123453A
Other languages
German (de)
French (fr)
Other versions
EP1026313A2 (en
EP1026313A3 (en
Inventor
Günter Dr. Halmschlager
Walter Dr. Holzer
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 Paper Patent GmbH
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Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1026313A2 publication Critical patent/EP1026313A2/en
Publication of EP1026313A3 publication Critical patent/EP1026313A3/en
Application granted granted Critical
Publication of EP1026313B1 publication Critical patent/EP1026313B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/60—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the warp or weft elements other than yarns or threads
    • D03D15/67—Metal wires
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/10—Wire-cloths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/901—Impermeable belts for extended nip press
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/902—Woven fabric for papermaking drier section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature

Definitions

  • the invention relates to a belt for machines for producing material webs, especially paper webs.
  • EP 0 006 316 A1 which is a band, is known from the prior art discloses in which the spaces between the forming a tissue Reinforcements are filled with a material of high thermal conductivity.
  • US 3,067,779 discloses a press felt whose fabric structure is partially made of electrical conductive threads is made.
  • the band is made of a composite material which comprises a preferably comprises elongated strength members fabricated fabric comprises, in which spaces between the strength members at least partially with a Filling material are filled, wherein the strength member made of a material high Thermal conductivity are the surface of the tape forming sections of the Reinforcements are exposed.
  • the weight of the tape according to the invention can be reduced, without affect the stability and strength of the tape. Furthermore, the tape much more flexible by the composite material according to the invention.
  • the invention Band can be made in principle in any width, which is more than 2 m can amount. Another advantage is that the manufacturing costs are lower than at Bands made of solid metal.
  • the invention also makes it possible, by changing the Proportion of reinforcing elements on the overall surface the surface finish and in particular the thermal conductivity of the band and thus its To adjust heat transfer behavior targeted. Overall, the invention thus created an easy to handle, cost effective and versatile tape.
  • the composite material at least substantially fluid impermeable.
  • the tape according to the invention can be used as a sealing tape in dry areas, e.g. from Paper machines are used. That the gaps in the fabric filling material prevents moisture from the material to be dried or Paper web passing through a drying room, which is separated from the heated area e.g. one drying cylinder and the band according to the invention is guided through, Uncontrolled escape into the environment.
  • bead-like thickenings are provided in the edge regions, which are preferred are formed by the reinforcements of the sheet.
  • the band according to the invention is provided with integrated sealing beads, which are formed in the production of the fabric with can.
  • the sealing beads which may be made of metal or plastic, seal together with the heated surface and between the sealing beads lying region of the band the aforementioned drying chamber for the material web to be dried in relation to the environment from. Separate seals are therefore not required according to the invention.
  • the band according to the invention can be achieved, which at least approximately corresponds to that of a full metal band.
  • the reinforcements are interwoven.
  • the fabric formed here by a fabric can be comparatively easily manufactured and targeted and reproducible with each desired properties are provided.
  • the proportion of strength members on the overall surface of the belt and thus its heat transfer behavior be specifically influenced.
  • the fabric is dipped in liquid filler.
  • the fabric is so to speak impregnated with the filling material, making the gaps on particularly easy and fast Be filled and the fluid tightness of the strength of the carriers and the filler cured in the final state Composite material can be produced.
  • the fabric After immersion in the filler material, excess material, which covers the surfaces of the fabric, be painted off, to expose the reinforcement forming the respective surface.
  • the fabric can be treated in such a way that the reinforcement and the filler material located between the reinforcements form at least approximately smooth surfaces.
  • FIGS Drawing whose only figure in a cut side view partially a tape according to an embodiment of the invention shows.
  • the inventive band 10 shown in the figure comprises a planar Metal fabric of interwoven metal threads 12, 14, 16 as a strength carrier, preferably made of stainless steel or bronze are.
  • a strength carrier preferably made of stainless steel or bronze are.
  • according to the invention can also be made of various Metals existing threads to be processed into a tape.
  • the cross-sectional shape of the reinforcement can basically arbitrary be selected, the cross section over the length of the reinforcement can be both constant and vary.
  • the strength carriers have e.g. an approximately circular cross section, but can also For example, be formed strip or band-shaped and e.g. one Cross-section in the form of a flat rectangle with rounded corners exhibit. Also mixed cross-sectional shapes of the reinforcement within a band 10 are possible according to the invention.
  • threads 16 extend in pairs by compartments formed by perpendicularly extending threads 12, 14.
  • any weaving method according to the invention can be used be made to the metal threads or narrow strips or ribbons 12, 14, 16 produce a sheet-like sheet with the desired width.
  • the surfaces of the belt 10 become horizontal from those in the figure extending threads 12, 14 formed.
  • the paired threads 16 in such a way be embedded in the plastic 18 that an intimate connection between the threads 16 and the plastic material 18, which is the fluid impermeability of the tape 10 ensures.
  • the erfindungsgernäße Volume 10 also be prepared such that even without a intimate connection between reinforcements and plastic material the fluid-tightness is guaranteed, by a flat Bands occurring due to pressure self-sealing effect.
  • the manner in which strength supports, in particular metal threads, a Swiss Patterson exhibiting Fabric is produced, arbitrarily and in particular depending from the desired properties of the fabric selectable.
  • the metal threads can be processed or woven together in this way be that the sheet substantially closed metallic Has surfaces between which the filler, in particular Plastic, is arranged.
  • the proportion of the filler or the Plastic on the overall surface of the tape is here so very small or negligible.
  • the first Metal threads 12, 14, 16 according to the respective weaving method with each other interwoven, so to speak, serving as the skeleton of Volume 10 produce metallic fabrics.
  • This metal mesh will be followed dipped in a bath of liquid plastic to the interstices to fill in the tissue.
  • plastic material which is the Covered surfaces of the now filled with plastic metal mesh, removed to create metallic bare surfaces.
  • the preferably still liquid plastic for example by scraping eliminated or painted in near-surface spaces.
  • the surfaces can be smoothed. That's the way it works ensured that the determined by the respective weaving method share of Metal threads 12, 14, 16 on the entire surface of the belt 10 in connection to the plastic treatment and curing of the plastic is still given.
  • the band 10 of a final treatment e.g. by grinding the strip surfaces be subjected.
  • the preferred application of the tape according to the invention consists in used as a sealing tape in dry areas of paper machines.
  • the sheet-like fabric can be produced in such a way that projecting in the edge regions at least in one direction bead-like thickenings are present, which are not shown in the figure are.
  • sealing beads may e.g. produced by interweaving the metal threads and thus formed in the preparation of the fabric with become. It is also possible to apply the sealing beads through on the surface to form the surface fabric resting plastic material.
  • the sealing beads can also come from another, neither for the strength carrier still used for the filling material or a material mixture or a composite material.
  • the strip according to the invention is a drying device of the paper machine, e.g. a drying cylinder having a heatable surface, together with the paper web to be dried and one or several sieves supplied in such a way that the band, the two sealing beads of the belt and the heated surface of the drying cylinder itself over a portion of the circumference of the drying cylinder extending drying space limit.
  • a drying room In this drying room are the to be dried Paper web and the sieves.
  • the paper web can be directly on the drying cylinder rest, while the sieves between the paper web and the sealing tape according to the invention are arranged.
  • the lateral sealing bulges of the Bandes either directly on the drying cylinder or on one on the Cylinder surface lying on screen.
  • the fluid impermeability of the composite material according to the invention can not evaporate moisture from the paper web escape through the belt sealed drying room.
  • the good thermal conductivity of the band ensures rapid heat dissipation, so that the moisture condenses on and from the screen is carried out of the dry area.

Description

Die Erfindung betrifft ein Band für Maschinen zur Herstellung von Materialbahnen, insbesondere Papierbahnen.The invention relates to a belt for machines for producing material webs, especially paper webs.

Es ist bekannt, in Papiermaschinen zum Stützen der Papierbahn Siebe aus Metallfäden oder Kunststofffäden zu verwenden. Aufgrund ihrer Durchlässigkeit können derartige Siebe nicht als Dichtbänder eingesetzt werden, die in Trockenbereichen von Papiermaschinen dazu dienen, einen an eine beheizte Fläche, z.B. die Oberfläche eines Trockenzylinders, angrenzenden Trockenraum abzudichten. Für solche Zwecke werden Bänder aus Vollmetall verwendet, deren Handhabung schwierig ist und die insbesondere aufgrund ihres hohen Gewichts und ihrer geringen Flexibilität die Bandgeschwindigkeit und somit die Arbeitsgeschwindigkeit der Papiermaschine nach oben begrenzen. Ein weiterer Nachteil von Vollmetallbändern besteht darin, daß ihre Breite aus Handhabungsgründen begrenzt ist und maximal etwa 2 m beträgt.It is known in paper machines for supporting the paper web wires made of metal threads or plastic threads to use. Due to their permeability, such strainers can not to be used as sealing tapes in dry areas of paper machines serve to move one to a heated area, e.g. the surface of a drying cylinder, seal adjacent drying room. For such purposes, bands are made out Full metal used, the handling is difficult and in particular because of their high weight and low flexibility, the belt speed and thus the Limit working speed of the paper machine upwards. Another disadvantage of full metal belts is that their width is limited for handling reasons and maximum about 2 m.

Aus dem Stand der Technik ist des weiteren die EP 0 006 316 A1 bekannt, die ein Band offenbart, bei dem die Zwischenräume zwischen den ein Gewebe bildenden Festigkeitsträgern mit einem Material hoher Wärmeleitfähigkeit gefüllt sind.Furthermore, EP 0 006 316 A1, which is a band, is known from the prior art discloses in which the spaces between the forming a tissue Reinforcements are filled with a material of high thermal conductivity.

Die US 3,067,779 offenbart ein Pressfilz dessen Gewebestruktur teilweise aus elektrisch leitenden Fäden hergestellt ist.US 3,067,779 discloses a press felt whose fabric structure is partially made of electrical conductive threads is made.

Die US 3,523,867 lehrt ein Fourdriniersieb mit einer Gewebestruktur aus metallischen Fäden, bei dem zur Randverstärkung die metallischen Fäden im Randbereich der Gewebestruktur in ein Polymer Material eingebettet sind.US 3,523,867 teaches a Fourdrinier wire with a metallic fabric structure Threads, in which the metallic threads in the edge region of the Tissue structure embedded in a polymer material.

Es ist das der Erfindung zugrundeliegende Problem (Aufgabe), ein Band der eingangs genannten Art sowie ein Verfahren zu dessen Herstellung zu schaffen, das einfach zu handhaben ist und insbesondere als Dichtband eingesetzt werden kann und bei dem der Wärmeübergang vom Band zu den mit dem Band in Kontakt befindlichen Flächen und der Wärmedurchgang durch das Band verbessert wird. It is the problem underlying the invention (task), a band of the beginning and a method for its production, which is easy to handle and in particular can be used as a sealing tape and in which the Heat transfer from the belt to the surfaces in contact with the belt and the Heat transfer through the belt is improved.

Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Anspruchs 1 und insbesondere dadurch, daß das Band aus einem Verbundmaterial hergestellt ist, welches ein aus bevorzugt langgestreckten Festigkeitsträgern angefertigtes Flächengebilde umfaßt, in welchem Zwischenräume zwischen den Festigkeitsträgern zumindest teilweise mit einem Füllmaterial gefüllt sind, wobei die Festigkeitsträger aus einem Material hoher Wärmeleitfähigkeit sind die die Oberfläche des Bandes bildenden Abschnitte der Festigkeitsträger freigelegt sind.The solution of this object is achieved by the features of claim 1 and in particular in that the band is made of a composite material which comprises a preferably comprises elongated strength members fabricated fabric comprises, in which spaces between the strength members at least partially with a Filling material are filled, wherein the strength member made of a material high Thermal conductivity are the surface of the tape forming sections of the Reinforcements are exposed.

Aufgrund des Verbindens von Festigkeitsträgern und Füllmaterial kann - im Vergleich zu Vollmetallbändern - das Gewicht des erfindungsgemäßen Bandes reduziert werden, ohne die Stabilität und die Festigkeit des Bandes zu beeinträchtigen. Des weiteren ist das Band durch das erfindungsgemäße Verbundmaterial wesentlich flexibler. Das erfindungsgemäße Band kann prinzipiell in einer beliebigen Breite hergestellt werden, die auch mehr als 2 m betragen kann. Ein weiterer Vorteil ist, daß die Herstellungskosten niedriger liegen als bei Bändern aus Vollmetall. Die Erfindung ermöglicht es außerdem, durch Verändern des Anteils der Festigkeitsträger an der Gesamtoberfläche die Oberflächenbeschaffenheit und insbesondere die Wärmeleitfähigkeit des Bandes und somit dessen Wärmedurchgangsverhalten gezielt einzustellen. Insgesamt wird durch die Erfindung somit ein einfach handhabbares, kostengünstiges und vielseitig einsetzbares Band geschaffen.Due to the joining of reinforcements and filling material can - compared to Vollmetallbändern - the weight of the tape according to the invention can be reduced, without affect the stability and strength of the tape. Furthermore, the tape much more flexible by the composite material according to the invention. The invention Band can be made in principle in any width, which is more than 2 m can amount. Another advantage is that the manufacturing costs are lower than at Bands made of solid metal. The invention also makes it possible, by changing the Proportion of reinforcing elements on the overall surface the surface finish and in particular the thermal conductivity of the band and thus its To adjust heat transfer behavior targeted. Overall, the invention thus created an easy to handle, cost effective and versatile tape.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist das Verbundmaterial zumindest im wesentlichen fluidundurchlässig.According to a preferred embodiment of the invention, the composite material at least substantially fluid impermeable.

Hierdurch kann das erfindungsgemäße Band als Dichtband in Trockenbereichen z.B. von Papiermaschinen eingesetzt werden. Das die Zwischenräume im Flächengebilde ausfüllende Material verhindert, daß Feuchtigkeit aus der zu trocknenden Material- bzw. Papierbahn, die durch einen Trockenraum, der von der beheizten Fläche z.B. eines Trockenzylinders und dem erfindungsgemäßen Band begrenzt wird, hindurchgeführt wird, unkontrolliert in die Umgebung entweichen kann.As a result, the tape according to the invention can be used as a sealing tape in dry areas, e.g. from Paper machines are used. That the gaps in the fabric filling material prevents moisture from the material to be dried or Paper web passing through a drying room, which is separated from the heated area e.g. one drying cylinder and the band according to the invention is guided through, Uncontrolled escape into the environment.

Gemäß einem weiteren bevorzugten Ausführungsbeispiel der Erfindung sind in den Randbereichen wulstartige Verdickungen vorgesehen, die bevorzugt von den Festigkeitsträgern des Flächengebildes gebildet sind.According to a further preferred embodiment of the invention bead-like thickenings are provided in the edge regions, which are preferred are formed by the reinforcements of the sheet.

Hierbei ist das erfindungsgemäße Band mit integrierten Dichtwülsten versehen, die bei der Herstellung des Flächengebildes mit ausgebildet werden können. Die Dichtwülste, die aus Metall oder Kunststoff bestehen können, dichten zusammen mit der beheizten Fläche und dem zwischen den Dichtwülsten liegenden Bereich des Bandes den vorstehend erwähnten Trokkenraum für die zu trocknende Materialbahn gegenüber der Umgebung ab. Separate Dichtungen sind erfindungsgemäß somit nicht erforderlich.In this case, the band according to the invention is provided with integrated sealing beads, which are formed in the production of the fabric with can. The sealing beads, which may be made of metal or plastic, seal together with the heated surface and between the sealing beads lying region of the band the aforementioned drying chamber for the material web to be dried in relation to the environment from. Separate seals are therefore not required according to the invention.

Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung ist auf wenigstens einer Seite von den Festigkeitsträgern eine zumindest im wesentlichen geschlossene Oberfläche gebildet.According to a further preferred embodiment of the invention is on at least one side of the strength members one at least substantially closed surface formed.

Durch die geschlossene Oberfläche wird ein großflächiger Kontakt des für die Festigkeitsträger verwendeten Materials mit z.B. der beheizten Fläche einer Trockeneinrichtung, beispielsweise eines Trockenzylinders, oder mit einem Kühlfluid ermöglicht. Bei Verwendung eines Materials hoher Wärmeleitfähigkeit, insbesondere von Metall, für die Festigkeitsträger wird die Wärmeleitfähigkeit des Bandes und somit der Durchgang von Wärme durch das Band maximiert. Es ist auch möglich, das Band auf beiden Seiten jeweils mit einer von den Festigkeitsträgern gebildeten, zumindest im wesentlichen geschlossenen Oberfläche zu versehen. Auf diese Weise kann bei Verwendung von Metall für die Festigkeitsträger ein Wärmedurchgangsverhalten des erfindungsgemäßen Bandes erzielt werden, welches zumindest näherungsweise demjenigen eines Vollmetallbandes entspricht.Due to the closed surface, a large-area contact of the for the reinforcements used material with e.g. the heated area a drying device, such as a drying cylinder, or with allows a cooling fluid. When using a material with high thermal conductivity, in particular of metal, for the strength carrier is the Thermal conductivity of the band and thus the passage of heat maximized by the band. It is also possible to tape on both Sides each with one of the reinforcements, at least to provide substantially closed surface. In this way When using metal for the strength carrier, a heat transfer behavior the band according to the invention can be achieved, which at least approximately corresponds to that of a full metal band.

Gemäß einem weiteren bevorzugten Ausführungsbeispiel der Erfindung sind die Festigkeitsträger miteinander verwoben.According to a further preferred embodiment of the invention the reinforcements are interwoven.

Das hierbei von einem Gewebe gebildete Flächengebilde kann vergleichsweise einfach hergestellt und gezielt sowie reproduzierbar mit den jeweils gewünschten Eigenschaften versehen werden. Insbesondere kann durch Auswählen eines bestimmten Webverfahrens der Anteil der Festigkeitsträger an der Gesamtoberfläche des Bandes und somit dessen Wärmedurchgangsverhalten gezielt beeinflußt werden.The fabric formed here by a fabric can be comparatively easily manufactured and targeted and reproducible with each desired properties are provided. In particular, by Selecting a particular weaving method the proportion of strength members on the overall surface of the belt and thus its heat transfer behavior be specifically influenced.

Die Lösung der der Erfindung zugrundeliegenden Aufgabe erfolgt des weiteren durch die Merkmale des unabhängigen Verfahrensanspruchs 13.The solution of the problem underlying the invention is further by the features of the independent method claim 13.

In einer bevorzugten Ausführung des erfindungsgemäßen Verfahrens wird das Flächengebilde in flüssiges Füllmaterial getaucht.In a preferred embodiment of the method according to the invention the fabric is dipped in liquid filler.

Das Flächengebilde wird hierbei gewissermaßen mit dem Füllmaterial getränkt, wodurch die Zwischenräume auf besonders einfache und schnelle Weise gefüllt werden und die Fluiddichtigkeit des von den Festigkeitsträgern und dem im endgültigen Zustand ausgehärteten Füllmaterial gebildeten Verbundmaterials hergestellt werden kann.The fabric is so to speak impregnated with the filling material, making the gaps on particularly easy and fast Be filled and the fluid tightness of the strength of the carriers and the filler cured in the final state Composite material can be produced.

Nach dem Eintauchen in das Füllmaterial kann überschüssiges Material, das die Oberflächen des Flächengebildes bedeckt, abgestrichen werden, um die die jeweilige Oberfläche bildenden Festigkeitsträger freizulegen. Das Flächengebilde kann dabei derart behandelt werden, daß die Festigkeitsträger und das zwischen den Festigkeitsträgern befindliche Füllmaterial zumindest näherungsweise glatte Oberflächen bilden.After immersion in the filler material, excess material, which covers the surfaces of the fabric, be painted off, to expose the reinforcement forming the respective surface. The fabric can be treated in such a way that the reinforcement and the filler material located between the reinforcements form at least approximately smooth surfaces.

Weitere bevorzugte Ausführungsformen der Erfindung sind in den Unteransprüchen, der Beschreibung sowie der Zeichnung angegeben.Further preferred embodiments of the invention are defined in the subclaims, the description and the drawing.

Die Erfindung wird im folgenden beispielhaft unter Bezugnahme auf die Zeichnung beschrieben, deren einzige Figur in einer geschnittenen Seitenansicht teilweise ein Band gemäß einem Ausführungsbeispiel der Erfindung zeigt.The invention will now be described by way of example with reference to FIGS Drawing described, whose only figure in a cut side view partially a tape according to an embodiment of the invention shows.

Das in der Figur dargestellte erfindungsgemäße Band 10 umfaßt ein flächiges Metallgewebe aus miteinander verwobenen Metallfäden 12, 14, 16 als Festigkeitsträger, die bevorzugt aus rostfreiem Stahl oder Bronze hergestellt sind. Grundsätzlich können erfindungsgemäß auch aus verschiedenen Metallen bestehende Fäden zu einem Band verarbeitet werden.The inventive band 10 shown in the figure comprises a planar Metal fabric of interwoven metal threads 12, 14, 16 as a strength carrier, preferably made of stainless steel or bronze are. In principle, according to the invention can also be made of various Metals existing threads to be processed into a tape.

Die Querschnittsform der Festigkeitsträger kann grundsätzlich beliebig gewählt werden, wobei der Querschnitt über die Länge der Festigkeitsträger sowohl konstant sein als auch variieren kann. Die Festigkeitsträger weisen z.B. einen etwa kreisförmigen Querschnitt auf, können aber auch beispielsweise streifen- oder bandförmig ausgebildet sein und z.B. einen Querschnitt in Form eines flachen Rechtecks mit abgerundeten Ecken aufweisen. Auch gemischte Querschnittsformen der Festigkeitsträger innerhalb eines Bandes 10 sind erfindungsgemäß möglich.The cross-sectional shape of the reinforcement can basically arbitrary be selected, the cross section over the length of the reinforcement can be both constant and vary. The strength carriers have e.g. an approximately circular cross section, but can also For example, be formed strip or band-shaped and e.g. one Cross-section in the form of a flat rectangle with rounded corners exhibit. Also mixed cross-sectional shapes of the reinforcement within a band 10 are possible according to the invention.

In der gezeigten Ausführungsform verlaufen Fäden 16 jeweils paarweise durch von senkrecht dazu verlaufenden Fäden 12, 14 gebildete Fächer. Prinzipiell kann erfindungsgemäß ein beliebiges Webverfahren verwendet werden, um aus den Metallfäden bzw. schmalen Streifen oder Bändern 12, 14, 16 ein bahnförmiges Flächengebilde mit der gewünschten Breite herzustellen.In the illustrated embodiment, threads 16 extend in pairs by compartments formed by perpendicularly extending threads 12, 14. In principle, any weaving method according to the invention can be used be made to the metal threads or narrow strips or ribbons 12, 14, 16 produce a sheet-like sheet with the desired width.

In den Zwischenräumen zwischen den einzelnen Fäden 12, 14, 16 befindet sich als Füllmaterial ein Kunststoffmaterial 18, wobei die Fäden 12, 14, 16 als Träger für den Kunststoff 18 dienen. In der dargestellten Schnittebene werden die Oberflächen des Bandes 10 von den in der Figur horizontal verlaufenden Fäden 12, 14 gebildet. In jedem der durch die Fäden 12, 14 festgelegten Fächer können die paarweise verlaufenden Fäden 16 derart in den Kunststoff 18 eingebettet sein, daß eine innige Verbindung zwischen den Fäden 16 und dem Kunststoffmaterial 18 besteht, welche die Fluidundurchlässigkeit des Bandes 10 sicherstellt. Jedoch kann das erfindungsgernäße Band 10 auch derart hergestellt werden, daß auch ohne eine innige Verbindung zwischen Festigkeitsträgern und Kunststoffmaterial die Fluiddichtigkeit gewährleistet ist, und zwar durch einen bei flächigen Bändern durch Druckeinwirkung auftretenden Selbstdichteffekt. In the spaces between the individual threads 12, 14, 16 is located itself as a filling material, a plastic material 18, wherein the threads 12, 14, 16 serve as a carrier for the plastic 18. In the illustrated section plane For example, the surfaces of the belt 10 become horizontal from those in the figure extending threads 12, 14 formed. In each of the through the threads 12, 14 fixed compartments, the paired threads 16 in such a way be embedded in the plastic 18 that an intimate connection between the threads 16 and the plastic material 18, which is the fluid impermeability of the tape 10 ensures. However, the erfindungsgernäße Volume 10 also be prepared such that even without a intimate connection between reinforcements and plastic material the fluid-tightness is guaranteed, by a flat Bands occurring due to pressure self-sealing effect.

Grundsätzlich ist erfindungsgemäß die Art und Weise, in der aus Festigkeitsträgem, insbesondere Metallfäden, ein Zwischenräume aufweisendes Flächengebilde hergestellt wird, beliebig und insbesondere in Abhängigkeit von den gewünschten Eigenschaften des Flächengebildes wählbar. Bevorzugt wird jedoch durch ein Webverfahren aus Metallfäden ein flächiges Metallgewebe angefertigt, dessen Webart entsprechend den jeweiligen Anforderungen gewählt wird.Basically, according to the invention, the manner in which strength supports, in particular metal threads, a Zwischenräumen exhibiting Fabric is produced, arbitrarily and in particular depending from the desired properties of the fabric selectable. Prefers However, by a weaving process of metal filaments a flat Metal fabric made, whose weave according to the respective requirements is selected.

Dabei können die Metallfäden derart verarbeitet bzw. miteinander verwoben werden, daß das Flächengebilde im wesentlichen geschlossene metallische Oberflächen aufweist, zwischen denen das Füllmaterial, insbesondere Kunststoff, angeordnet ist. Der Anteil des Füllmaterials bzw. des Kunststoffs an der Gesamtoberfläche des Bandes ist hierbei also sehr klein bzw. vernachlässigbar gering.The metal threads can be processed or woven together in this way be that the sheet substantially closed metallic Has surfaces between which the filler, in particular Plastic, is arranged. The proportion of the filler or the Plastic on the overall surface of the tape is here so very small or negligible.

Zur Herstellung des erfindungsgemäßen Bandes 10 werden zunächst die Metallfäden 12, 14, 16 gemäß dem jeweiligen Webverfahren miteinander verwoben, um das gewissermaßen als Skelett des Bandes 10 dienende metallische Flächengebilde herzustellen. Dieses Metallgewebe wird anschließend in ein Bad aus flüssigem Kunststoff getaucht, um die Zwischenräume in dem Gewebe zu füllen.For the production of the tape 10 according to the invention, the first Metal threads 12, 14, 16 according to the respective weaving method with each other interwoven, so to speak, serving as the skeleton of Volume 10 produce metallic fabrics. This metal mesh will be followed dipped in a bath of liquid plastic to the interstices to fill in the tissue.

Nach der Entnahme aus dem Tauchbad wird Kunststoffmaterial, das die Oberflächen des nunmehr mit Kunststoff gefüllten Metallgewebes bedeckt, entfernt, um metallisch blanke Oberflächen zu schaffen. Hierzu kann der vorzugsweise noch flüssige Kunststoff beispielsweise durch Abstreichen beseitigt oder in oberflächennahe Zwischenräume gestrichen werden. Dabei können die Oberflächen geglättet werden. Auf diese Weise wird dafür gesorgt, daß der durch das jeweilige Webverfahren bestimmte Anteil der Metallfäden 12, 14, 16 an der Gesamtoberfläche des Bandes 10 im Anschluß an die Kunststoffbehandlung und das Aushärten des Kunststoffes nach wie vor gegeben ist. In einem weiteren Arbeitsschritt kann das Band 10 einer abschließenden Behandlung z.B. durch Schleifen der Bandoberflächen unterzogen werden.After removal from the dip is plastic material, which is the Covered surfaces of the now filled with plastic metal mesh, removed to create metallic bare surfaces. For this purpose, the preferably still liquid plastic, for example by scraping eliminated or painted in near-surface spaces. there The surfaces can be smoothed. That's the way it works ensured that the determined by the respective weaving method share of Metal threads 12, 14, 16 on the entire surface of the belt 10 in connection to the plastic treatment and curing of the plastic is still given. In a further step, the band 10 of a final treatment e.g. by grinding the strip surfaces be subjected.

Wenngleich die vorstehend erläuterte Anwendung eines Kunststoff-Tauchbades die bevorzugte Vorgehensweise darstellt, bestünde eine alternative Möglichkeit zum Einbringen von Kunststoff in die Zwischenräume darin, das Metallgewebe mit flüssigem Kunststoff zu besprühen und - falls gewünscht - anschließend den die Oberflächen bedeckenden Kunststoff zu entfernen, um die Metallfäden freizulegen.Although the above-described application of a plastic immersion bath the preferred course of action would be an alternative Possibility of introducing plastic into the spaces in it, to spray the metal mesh with liquid plastic and - if desired - Then to the plastic covering the surfaces Remove to expose the metal filaments.

Die bevorzugte Anwendung des erfindungsgemäßen Bandes besteht in dem Einsatz als Dichtband in Trockenbereichen von Papiermaschinen. Hierzu kann das bahnförmige Flächengebilde derart hergestellt werden, daß in den Randbereichen zumindest in eine Richtung abstehende wulstartige Verdickungen vorhanden sind, die in der Figur nicht dargestellt sind.The preferred application of the tape according to the invention consists in used as a sealing tape in dry areas of paper machines. For this purpose, the sheet-like fabric can be produced in such a way that projecting in the edge regions at least in one direction bead-like thickenings are present, which are not shown in the figure are.

Diese Dichtwülste können z.B. durch Verweben der Metallfäden hergestellt und somit bei der Anfertigung des Flächengewebes mit ausgebildet werden. Es ist auch möglich, die Dichtwülste durch auf der Oberfläche des Flächengewebes aufliegendes Kunststoffmaterial zu bilden. Die Dichtwülste können auch aus einem weiteren, weder für die Festigkeitsträger noch für das Füllmaterial verwendeten Material oder einer Materialmischung bzw. einem Materialverbund bestehen. These sealing beads may e.g. produced by interweaving the metal threads and thus formed in the preparation of the fabric with become. It is also possible to apply the sealing beads through on the surface to form the surface fabric resting plastic material. The sealing beads can also come from another, neither for the strength carrier still used for the filling material or a material mixture or a composite material.

Das erfindungsgemäße Band wird einer Trockeneinrichtung der Papiermaschine, z.B. einem eine beheizbare Oberfläche aufweisenden Trockenzylinder, zusammen mit der zu trocknenden Papierbahn und einem oder mehreren Sieben derart zugeführt, daß das Band, die beiden Dichtwülste des Bandes und die beheizte Oberfläche des Trockenzylinders einen sich über einen Teil des Umfangs des Trockenzylinders erstreckenden Trockenraum begrenzen. In diesem Trockenraum befinden sich die zu trocknende Papierbahn sowie die Siebe. Die Papierbahn kann direkt auf dem Trockenzylinder aufliegen, während die Siebe zwischen der Papierbahn und dem erfindungsgemäßen Dichtband angeordnet sind. In Abhängigkeit von den Breiten des Bandes und der Siebe liegen die seitlichen Dichtwülste des Bandes entweder direkt auf dem Trockenzylinder oder auf einem auf der Zylinderoberfläche liegenden Sieb auf.The strip according to the invention is a drying device of the paper machine, e.g. a drying cylinder having a heatable surface, together with the paper web to be dried and one or several sieves supplied in such a way that the band, the two sealing beads of the belt and the heated surface of the drying cylinder itself over a portion of the circumference of the drying cylinder extending drying space limit. In this drying room are the to be dried Paper web and the sieves. The paper web can be directly on the drying cylinder rest, while the sieves between the paper web and the sealing tape according to the invention are arranged. Depending on the Widths of the band and the sieves are the lateral sealing bulges of the Bandes either directly on the drying cylinder or on one on the Cylinder surface lying on screen.

Wegen der Fluidundurchlässigkeit des erfindungsgemäßen Verbundmaterials kann aus der Papierbahn verdampfende Feuchtigkeit nicht aus dem durch das Band abgedichteten Trockenraum entweichen. Die gute Wärmeleitfähigkeit des Bandes gewährleistet einen raschen Wärmeabtransport, so daß die Feuchtigkeit an dem Sieb kondensiert und von diesem aus dem Trockenbereich herausgetragen wird. Because of the fluid impermeability of the composite material according to the invention can not evaporate moisture from the paper web escape through the belt sealed drying room. The good thermal conductivity of the band ensures rapid heat dissipation, so that the moisture condenses on and from the screen is carried out of the dry area.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Bandtape
12, 1412, 14
Metallfädenmetal filaments
1616
Metallfädenmetal filaments
1818
KunststoffmaterialPlastic material

Claims (17)

  1. Band for machines for producing material webs, in particular paper webs, which is produced from a composite material which comprises a two-dimensional structure fabricated from preferably elongated reinforcements (12, 14, 16), in which interspaces between the reinforcements (12, 14, 16) are at least partly filled with a filler material (18), the reinforcements (12, 14, 16) being produced from a material with a high thermal conductivity, characterized in that the sections of the reinforcements (12, 14, 16) that form the surface of the band are exposed.
  2. Band according to Claim 1, characterized in that the material with a high thermal conductivity is metal, preferably stainless steel and/or bronze.
  3. Band according to Claim 1 or 2, characterized in that the reinforcements are provided in the form of filaments, in particular metal filaments (12, 14, 16).
  4. Band according to at least one of the preceding claims, characterized in that the reinforcements (12, 14, 16) have an at least approximately circular cross section and/or are provided in the form of, in particular, narrow strips and/or ribbons.
  5. Band according to at least one of the preceding claims, characterized in that at least some of the reinforcements in each case have a cross-sectional shape that varies over their length.
  6. Band according to at least one of the preceding claims, characterized in that the filler material (18) provided is plastic.
  7. Band according to at least one of the preceding claims, characterized in that the composite material is at least substantially impermeable to fluid.
  8. Band according to at least one of the preceding claims, characterized in that, in the edge regions, in particular bead-like thickenings are provided, which are formed from the reinforcements (12, 14, 16) of the two-dimensional structure, the filler material (18) and/or at least one further material or at least one material mixture.
  9. Band according to at least one of the preceding claims, characterized in that, on at least one side of the reinforcements (12, 14, 16), an at least substantially closed surface is formed.
  10. Band according to at least one of the preceding claims, characterized in that, on at least one side, the reinforcements (12, 14, 16) and the filler material (18) form an at least approximately smooth surface.
  11. Band according to at least one of the preceding claims, characterized in that the two-dimensional structure is formed as a wire.
  12. Band according to at least one of the preceding claims, characterized in that the reinforcements (12, 14, 16) are interwoven.
  13. Method for producing a band according to one of Claims 1 to 12, in which a two-dimensional structure is fabricated from preferably elongated reinforcements (12, 14, 16) of a material of high thermal conductivity, in particular metal filaments, and interspaces between the reinforcements (12, 14, 16) are at least partly filled with a filler material (18), in particular with plastic, characterized in that the filler material (18) covering the surfaces of the two-dimensional structure is removed, in particular scraped off, and/or is scraped into the interspaces.
  14. Method according to Claim 13, characterized in that the two-dimensional structure is dipped in liquid filler material (18).
  15. Method according to Claim 13 or 14, characterized in that the two-dimensional structure is sprayed with liquid filler material (18).
  16. Method according to at least one of Claims 13 to 15, characterized in that, following the treatment with in particular liquid filler material (18), the surfaces of the two-dimensional structure are smoothed and/or the two-dimensional structure is subjected to a final surface treatment, in particular by means of grinding the surfaces.
  17. Method according to at least one of Claims 13 to 16, characterized in that the reinforcements (12, 14, 16) are interwoven, the weaving method preferably being chosen in each case as a function of the desired surface composition, in particular of the desired heat transfer behaviour.
EP99123453A 1999-01-13 1999-11-25 Band for making a web material Expired - Lifetime EP1026313B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19900989A DE19900989A1 (en) 1999-01-13 1999-01-13 Belt for machines for the production of material webs
DE19900989 1999-01-13

Publications (3)

Publication Number Publication Date
EP1026313A2 EP1026313A2 (en) 2000-08-09
EP1026313A3 EP1026313A3 (en) 2001-05-09
EP1026313B1 true EP1026313B1 (en) 2005-04-13

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EP99123453A Expired - Lifetime EP1026313B1 (en) 1999-01-13 1999-11-25 Band for making a web material

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US (1) US7005045B1 (en)
EP (1) EP1026313B1 (en)
DE (2) DE19900989A1 (en)

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DE102009045213A1 (en) 2009-09-30 2011-03-31 Voith Patent Gmbh Band i.e. sealing band, for use in drying or smoothing arrangement for e.g. paper machine, has support elements forming part of surfaces and consisting of material having high heat conductivity, where band is impermeable to fluid

Also Published As

Publication number Publication date
US7005045B1 (en) 2006-02-28
DE19900989A1 (en) 2000-07-27
DE59911904D1 (en) 2005-05-19
EP1026313A2 (en) 2000-08-09
EP1026313A3 (en) 2001-05-09

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