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EP1897980B1 - Belt for a machine for manufacturing sheet material, in particular paper or cardboard and method for manufacturing such a belt - Google Patents

Belt for a machine for manufacturing sheet material, in particular paper or cardboard and method for manufacturing such a belt Download PDF

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Publication number
EP1897980B1
EP1897980B1 EP20070114378 EP07114378A EP1897980B1 EP 1897980 B1 EP1897980 B1 EP 1897980B1 EP 20070114378 EP20070114378 EP 20070114378 EP 07114378 A EP07114378 A EP 07114378A EP 1897980 B1 EP1897980 B1 EP 1897980B1
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EP
European Patent Office
Prior art keywords
belt
filaments
cross
longitudinal
sectional
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.)
Revoked
Application number
EP20070114378
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German (de)
French (fr)
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EP1897980A1 (en
Inventor
Frank Bez
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Voith Patent GmbH
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Voith Patent GmbH
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Priority to PL07114378T priority Critical patent/PL1897980T3/en
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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/04—Endless fabrics
    • 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
    • D21F1/0054—Seams thereof
    • 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
    • Y10S162/90—Papermaking press felts
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/904—Paper making and fiber liberation with specified seam structure of papermaking belt
    • 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
    • Y10T428/19—Sheets or webs edge spliced or joined
    • Y10T428/192—Sheets or webs coplanar
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]

Definitions

  • the present invention relates to a belt for a machine for producing sheet material, such as e.g. Paper or board, and a method for producing such a tape.
  • bands are used in different sections, which are permeable to the removal of moisture from the web material to be produced for air or steam.
  • Such bands to be used for example, in press sections or dry sections are often provided to provide this required permeability as fabric tapes with longitudinal threads running in a tape longitudinal direction and transverse threads running in a tape transverse direction, wherein generally the tape longitudinal direction also corresponds to the direction of movement of the tape.
  • a strip for a machine for producing web material comprising at least one fabric layer with longitudinal threads extending substantially in one strip longitudinal direction and transverse threads extending substantially in a strip transverse direction, wherein, to provide an endless configuration of the band, end portions of the longitudinal threads are interwoven with connecting transverse threads, wherein at yarn ends of at least a portion of the Cross-linked interconnecting threads longitudinal cross-sectional extensions are provided.
  • the cross-sectional enlargements form an integral part of the longitudinal threads.
  • additional materials such as e.g. Glue or the like can be dispensed with.
  • additional material such as e.g. Adhesives
  • At least a part of the cross-sectional extensions may be formed by knotting the thread ends.
  • At least part of the cross-sectional enlargements be formed by deformation of the thread ends.
  • at least a part of the longitudinal threads provided with cross-sectional widening is constructed of thermoplastic material and that the cross-sectional widenings are formed by hot deformation.
  • At least part of the cross-sectional widenings is formed by attaching clamping elements to the thread ends. This variant is particularly advantageous if, due to the dimensioning or the material the longitudinal threads knotting the thread ends or the deformation of the thread ends, for example by thermal action, is not possible.
  • the cross-sectional widenings at the thread ends be dimensioned such that they are larger than the fabric interspaces generated in the region of such thread ends by the threads surrounding them.
  • such strips in various areas of machines for the production of web material, that is, for example, paper machines.
  • a band may be provided for use in a press section. It is also possible to provide such a band for use in a dry section.
  • a belt for a machine for making web material is generally designated 10.
  • This band which can be used, for example, in a press section or a dry section, comprises a band body 12, which in the example shown is constructed with a fabric layer 14.
  • This fabric layer 14 comprises longitudinal yarns 16 running in a band longitudinal direction and transverse yarns 18, ie substantially transverse in a ribbon transverse direction.
  • the longitudinal yarns 16 can advantageously be warp yarns, while the transverse yarns are weft yarns. In this way, it becomes possible to weave this with almost any length for a given width of such a band 10.
  • the band body 12 is woven during the weaving process so that the longitudinal threads 16, ie, for example warp threads, have interwoven end regions at their two end regions 20, 22, ie, with transverse threads 18, for example weft threads 24 and 26 are provided.
  • the two recognizable end regions 24 and 26 at the ends 20, 22 of the band body 14 are respective end regions of the same longitudinal thread 16, which of course does not necessarily have to be the case.
  • These end portions 24, 26 of the or each longitudinal thread 16 are then interwoven to form a connection zone V with connecting transverse threads VQ.
  • the connection zone V comprises the connecting transverse threads 1, 2, 3, 4 and 5.
  • connection zone V a fabric structure, preferably the fabric structure, is obtained by the end regions 24 and 26 of the longitudinal threads 16 and the connecting transverse threads VQ , which is present in the remaining band body 12 corresponds, so that over the entire length of the band 10 now provided in endless configuration uniform surface properties are present.
  • cross-sectional widenings are formed in the band 10 according to the invention in the area of these thread ends 28 and 30 in the manner described below. It is first after the generation of the connection zone V by the use of the thread end 28 in Fig. 1 recognizable cutting tools 32 ensured that, as already apparent from the thread end 30, they project beyond the fabric layer 14 only to a predetermined extent. This predetermined extent may of course also be dependent on the thickness of the longitudinal threads 16 in the range of 3 to 5 mm.
  • the thread ends 28 and 30 After at least in those areas in which cross-sectional enlargements are to be formed, for example, the edge region of such a belt 10, the thread ends 28 and 30 have been shortened to this predetermined length or have already been provided in the connection process with such length, then become These thread ends 28 and 30, the cross-sectional extensions provided.
  • longitudinal threads 16 with thermoplastic construction material, for example polyethylene, this can be achieved by providing a by in Fig. 2 indicated tool 24, for example one of the tip of a soldering iron, on the Thread ends 28 and 30 is acted upon.
  • a by in Fig. 2 indicated tool 24 for example one of the tip of a soldering iron
  • the cross-sectional widenings 36, 38 will form with appropriate pressure loading by the tool 34 so that they conform to the shape of the surrounding threads .
  • the cross-sectional enlargements will have a dimension which is greater than a respective tissue interspace in which a longitudinal thread 16 having such a cross-sectional widening 36 or 38 extends between the further longitudinal threads 16 or transverse threads 18 surrounding it. In this way it can be reliably ensured that thus treated thread ends 28 and 30 can no longer slip out of the fabric structure.
  • cross-sectional enlargements are not generated by thermal treatment, but by knotting, so forming nodes at the thread ends.
  • the cross-sectional enlargements thus form an integral part of the longitudinal threads 16 themselves, since they are also made of their structural material, albeit by mechanical treatment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Paper (AREA)
  • Making Paper Articles (AREA)

Abstract

A paper mill has an endless woven conveyer belt consisting of longitudinal (16) and transverse (18) arrays of threads. The two ends (28, 30) of the endless belt (10) are joined at the interface array by transverse threads (VQ) of thicker cross-sectional area (36) at the belt outer margin.

Description

Die vorliegende Erfindung betrifft ein Band für eine Maschine zur Herstellung von Bahnmaterial, wie z.B. Papier oder Karton, sowie ein Verfahren zur Herstellung eines derartigen Bandes.The present invention relates to a belt for a machine for producing sheet material, such as e.g. Paper or board, and a method for producing such a tape.

In Maschinen zur Herstellung von Bahnmaterial, also beispielsweise Papiermaschinen, werden in verschiedenen Sektionen Bänder eingesetzt, die zum Abziehen von Feuchtigkeit aus dem zu fertigenden Bahnmaterial für Luft bzw. Dampf durchlässig sind. Derartige beispielsweise in Presssektionen oder Trockensektionen einzusetzende Bänder werden zum Bereitstellen dieser erforderlichen Permeabilität häufig als Gewebebänder bereitgestellt mit in einer Bandlängsrichtung verlaufenden Längsfäden und in einer Bandquerrichtung verlaufenden Querfäden, wobei im Allgemeinen die Bandlängsrichtung auch der Bewegungsrichtung des Bandes entspricht. Um die Bänder in einer für derartige Maschinen erforderlichen Endloskonfiguration bereitstellen zu können, ist es beispielsweise möglich, die Längsenden eines in einem Webvorgang erzeugten Bandkörpers mit überstehenden, also nicht mit Schussfäden des Bandkörpers verwobenen Endbereichen bereitzustellen. Diese Endbereiche der an den beiden Enden des Bandkörpers überstehenden Längsfäden werden dann in einem Verbindungsvorgang mit Verbindungs-Querfäden verwoben, so dass eine Verbindungszone gebildet wird, in welcher zwar grundsätzlich eine der Gewebestruktur des restlichen Bandkörpers entsprechende Gewebestruktur mit entsprechendem Bindungsmuster vorhanden ist, in welcher jedoch noch die Fadenenden der mit den Verbindungs-Querfäden verwobenen Längsfäden überstehen. Die Fadenenden werden dann gekürzt, so dass sie über die Oberfläche der Gewebestruktur im Wesentlichen nicht überstehen. Ein solches Band ist aus US-A-3 366 355 bekannt.In machines for the production of web material, so for example paper machines, bands are used in different sections, which are permeable to the removal of moisture from the web material to be produced for air or steam. Such bands to be used, for example, in press sections or dry sections are often provided to provide this required permeability as fabric tapes with longitudinal threads running in a tape longitudinal direction and transverse threads running in a tape transverse direction, wherein generally the tape longitudinal direction also corresponds to the direction of movement of the tape. In order to be able to provide the belts in an endless configuration required for such machines, it is possible, for example, to provide the longitudinal ends of a belt body produced in a weaving process with projecting end regions, that is, not woven with weft threads of the belt body. These end portions of the projecting at the two ends of the tape body longitudinal threads are then woven in a connection process with connecting transverse threads, so that a connection zone is formed, in which, in principle, the fabric structure of the rest of the belt body corresponding tissue structure is present with a corresponding pattern of bonding, in which still survive the thread ends of the interwoven with the connecting transverse threads longitudinal threads. The suture ends are then shortened so that they pass over the surface of the tissue structure essentially not survive. Such a band is out US-A-3,366,355 known.

Es hat sich gezeigt, dass vor allem in den Randbereichen derartiger Bänder die Gefahr besteht, dass die so gekürzten Fadenenden aus den Gewebezwischenräumen, gebildet durch die Fadenenden umgebende Längs- bzw. Querfäden, herausschlüpfen, so dass ausgefranste Streifen entstehen, die ein optisches Erscheinungsbild aufweisen, das demjenigen einer Laufmasche entspricht. Die Tatsache, dass dieses Problem primär in den Randbereichen eines derartigen Bands auftritt, also denjenigen Bereichen, die nicht mit dem zu fertigenden Bahnmaterial in Kontakt treten, könnte darauf hindeuten, dass dieses Problem thermisch induziert ist, da in diesen Bereichen eine Kühlung des im Fertigungsprozess erwärmenden Bandes durch das voranzutransportierende Bahnmaterial nicht erzeugt wird. Auch die Einwirkung von aus Reinigungsdüsen mit vergleichsweise hohem Druck abgegebener Reinigungsflüssigkeit könnte dieses Herausschlüpfen der Fadenenden begünstigen.It has been found that, especially in the edge regions of such strips, there is the danger that the thus shortened thread ends slip out of the fabric interspaces, formed by the longitudinal or transverse threads surrounding the thread ends, so that frayed strips are produced which have an optical appearance which corresponds to that of a run. The fact that this problem occurs primarily in the peripheral areas of such a band, ie those areas which do not come into contact with the web material to be produced, could indicate that this problem is thermally induced, since in these areas cooling of the in the manufacturing process heating belt is not generated by the sheet material to be transported forward. The action of cleaning fluid discharged from cleaning nozzles at a comparatively high pressure could also favor this emergence of the yarn ends.

Es ist die Aufgabe der vorliegenden Erfindung, ein Band für eine Maschine zur Herstellung von Bahnmaterial, insbesondere Papier oder Karton, vorzusehen, bei welchem das Problem des Herausschlüpfens von Fadenenden beseitigt ist. Ferner ist es die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Herstellung eines derartigen Bandes zur Herstellung von Bahnmaterial vorzusehen.It is the object of the present invention to provide a belt for a machine for producing sheet material, in particular paper or cardboard, in which the problem of slipping out of yarn ends is eliminated. Further, it is the object of the present invention to provide a method for producing such a belt for the production of web material.

Gemäß einem ersten Aspekt der vorliegenden Erfindung wird die eingangs genannte Aufgabe gelöst durch ein Band für eine Maschine zur Herstellung von Bahnmaterial, insbesondere Papier oder Karton, umfassend wenigstens eine Gewebelage mit im Wesentlichen in einer Bandlängsrichtung verlaufenden Längsfäden und im Wesentlichen in einer Bandquerrichtung verlaufenden Querfäden, wobei zum Bereitstellen einer Endloskonfiguration des Bandes Endbereiche der Längsfäden mit Verbindungs-Querfäden verwoben sind, wobei an Fadenenden von wenigstens einem Teil der mit Verbindungs-Querfäden verwobenen Längsfäden Querschnittserweiterungen vorgesehen sind.According to a first aspect of the present invention, the object mentioned at the outset is achieved by a strip for a machine for producing web material, in particular paper or cardboard, comprising at least one fabric layer with longitudinal threads extending substantially in one strip longitudinal direction and transverse threads extending substantially in a strip transverse direction, wherein, to provide an endless configuration of the band, end portions of the longitudinal threads are interwoven with connecting transverse threads, wherein at yarn ends of at least a portion of the Cross-linked interconnecting threads longitudinal cross-sectional extensions are provided.

Da bei dem erfindungsgemäßen Band an den Fadenenden der Längsfäden Querschnittserweiterungen gebildet sind, wird die Gefahr des Herausschlüpfens dieser Fadenenden aus den Gewebezwischenräumen bzw. Gewebemaschen, gebildet durch die ein jeweiliges Fadenende umgebenden Längs- und Querfäden, praktisch beseitigt.Since cross-sectional enlargements are formed in the band according to the invention at the yarn ends of the longitudinal yarns, the risk of slipping out of these yarn ends from the fabric interstices or fabric stitches formed by the longitudinal and transverse yarns surrounding a respective yarn end is virtually eliminated.

Dabei kann beispielsweise vorgesehen sein, dass die Querschnittserweiterungen einen integralen Bestandteil der Längsfäden bilden. Auf diese Art und Weise kann das Anbringen zusätzlicher Materialien, wie z.B. Klebstoff oder dergleichen, verzichtet werden. Dies ist insbesondere daher vorteilhaft, da somit nicht auf die erforderliche Verträglichkeit des Aufbaumaterials der Längsfäden mit zusätzlichem Material, wie z.B. Klebstoffen, geachtet werden muss.It can be provided, for example, that the cross-sectional enlargements form an integral part of the longitudinal threads. In this way, the attachment of additional materials, such as e.g. Glue or the like can be dispensed with. This is particularly advantageous because it does not affect the required compatibility of the construction material of the longitudinal threads with additional material, such as e.g. Adhesives, care must be taken.

Beispielsweise kann wenigstens ein Teil der Querschnittserweiterungen durch Verknotung der Fadenenden gebildet sein.For example, at least a part of the cross-sectional extensions may be formed by knotting the thread ends.

Bei einer alternativen Art und Weise zum Vorsehen der Querschnittserweiterungen wird vorgeschlagen, dass wenigstens ein Teil der Querschnittserweiterungen durch Verformung der Fadenenden gebildet ist. Hierzu hat es sich als besonders vorteilhaft erwiesen, dass wenigstens ein Teil der mit Querschnittserweiterung versehenen Längsfäden aus thermoplastischem Material aufgebaut ist und dass die Querschnittserweiterungen durch Heißverformung gebildet sind.In an alternative way of providing the cross-sectional enlargements, it is proposed that at least part of the cross-sectional enlargements be formed by deformation of the thread ends. For this purpose, it has proved to be particularly advantageous that at least a part of the longitudinal threads provided with cross-sectional widening is constructed of thermoplastic material and that the cross-sectional widenings are formed by hot deformation.

Bei einer weiteren alternativen Variante kann vorgesehen sein, dass wenigstens ein Teil der Querschnittserweiterungen durch Anbringen von Klemmelementen an den Fadenenden gebildet ist. Diese Variante ist besonders dann vorteilhaft, wenn auf Grund der Dimensionierung bzw. des Materials der Längsfäden ein Verknoten der Fadenenden bzw. das Verformen der Fadenenden, beispielsweise durch thermische Einwirkung, nicht möglich ist.In a further alternative variant it can be provided that at least part of the cross-sectional widenings is formed by attaching clamping elements to the thread ends. This variant is particularly advantageous if, due to the dimensioning or the material the longitudinal threads knotting the thread ends or the deformation of the thread ends, for example by thermal action, is not possible.

Vor allem dann, wenn das Problem des Herausschlüpfens der Fadenenden primär in Randbereichen eines derartigen Bandes zu erwarten ist, ist es vorteilhaft, wenn im Wesentlichen nur in Randbereichen des Bandes Längsfäden mit Querschnittserweiterung vorgesehen sind. Auf diese Art und Weise kann in demjenigen Breitenbereich des Bandes, in welchem dieses Problem nicht zu erwarten ist, auf das Durchführen von Bearbeitungsmaßnahmen zum Bereitstellen der Querschnittserweiterungen verzichtet werden, und es kann weiterhin die Gefahr eliminiert werden, dass durch Querschnitsserweiterungen möglicherweise gebildete Überstände Markierungseffekte in dem zu fertigenden Bahnmaterial generieren.Especially if the problem of slipping out of the thread ends is to be expected primarily in the edge regions of such a strip, it is advantageous if longitudinal threads with cross-sectional widening are provided substantially only in edge regions of the strip. In this way, in the wide area of the belt in which this problem is not to be expected, it is possible to dispense with the processing measures for providing the cross-sectional enlargements, and it is possible to further eliminate the risk that protrusions possibly formed by cross-sectional extensions will have marking effects generate the web material to be produced.

Um das Herausschlüpfen der Fadenenden zuverlässig verhindern zu können, wird vorgeschlagen, dass die Querschnittserweiterungen an den Fadenenden derart bemessen sind, dass sie größer sind als die im Bereich von derartige Fadenenden durch diese umgebende Fäden erzeugten Gewebezwischenräume.In order to be able to reliably prevent the thread ends from slipping out, it is proposed that the cross-sectional widenings at the thread ends be dimensioned such that they are larger than the fabric interspaces generated in the region of such thread ends by the threads surrounding them.

Auf Grund der Dimensionierung derartiger Bänder für Maschinen zur Herstellung von Bahnmaterial ist es besonders vorteilhaft, wenn die Längsfäden Kettfäden sind und die Querfäden Schussfäden sind. Somit können derartige Bänder bei vorgegebener Bandbreite praktisch mit beliebiger Bandlänge gefertigt werden.Due to the dimensioning of such belts for machines for the production of web material, it is particularly advantageous if the longitudinal threads are warp threads and the transverse threads are weft threads. Thus, such tapes can be made with a given bandwidth virtually any length of tape.

Wie bereits eingangs dargelegt, ist es möglich, derartige Bänder in verschiedenen Bereichen von Maschinen zur Fertigung von Bahnmaterial, also beispielsweise Papiermaschinen, einzusetzen. So kann ein derartiges Band beispielsweise zum Einsatz in einer Presssektion vorgesehen sein. Auch ist es möglich, ein derartiges Band zum Einsatz in einer Trockensektion vorzusehen.As already stated at the outset, it is possible to use such strips in various areas of machines for the production of web material, that is, for example, paper machines. For example, such a band may be provided for use in a press section. It is also possible to provide such a band for use in a dry section.

Gemäß einem zweiten Aspekt der vorliegenden Erfindung wird die eingangs genannte Aufgabe gelöst durch ein Verfahren zur Herstellung eines Bandes für eine Maschine zur Herstellung von Bahnmaterial, insbesondere Papier oder Karton, umfassend die Maßnahmen:

  1. a) Herstellen eines wenigstens eine Gewebelage umfassenden Bandkörpers mit im Wesentlichen in einer Bandlängsrichtung verlaufenden Längsfäden und im Wesentlichen in einer Badquerrichtung verlaufenden Querfäden derart, dass an Bandkörperenden die Längsfäden mit Endbereichen überstehen;
  2. b) Verweben der Endbereiche der Längsfäden an den Bandkörperenden mit Verbindungs-Querfäden zum Bereitstellen einer Endloskonfiguration des Bandes;
  3. c) Vorsehen von Querschnittserweiterungen an Fadenenden von wenigstens einem Teil der Längsfäden.
According to a second aspect of the present invention, the object mentioned at the outset is achieved by a method for producing a strip for a machine for producing web material, in particular paper or board, comprising the measures:
  1. a) producing a band body comprising at least one fabric layer with longitudinal threads extending substantially in a band longitudinal direction and transverse threads extending essentially in a transverse direction of the web such that the longitudinal threads with end regions project beyond the band body ends;
  2. b) interweaving the end portions of the longitudinal threads at the tape body ends with connecting transverse threads to provide an endless configuration of the tape;
  3. c) providing cross-sectional extensions at yarn ends of at least a portion of the longitudinal yarns.

Bei diesem Verfahren kann weiterhin vorgesehen sein, dass nach Durchführung der Maßnahme b) und vor Durchführung der Maßnahme c) die Fadenenden der Längsfäden auf ein vorbestimmtes Überstandsmaß gekürzt werden.In this method, it can furthermore be provided that, after carrying out the measure b) and before carrying out the measure c), the thread ends of the longitudinal threads are shortened to a predetermined excess length.

Die vorliegende Erfindung wird nachfolgend mit Bezug auf die beiliegenden Zeichnungen detailliert beschrieben. Es zeigt:

Fig. 1
eine Teil-Längsschnittansicht eines Bandes für eine Maschine zur Herstellung von Bahnmaterial in einer Verbindungszone;
Fig. 2
den in Fig. 1 dargestellten Teil des Bandes nach Erzeugung von Querschnittserweiterungen an Fadenenden.
The present invention will be described below in detail with reference to the accompanying drawings. It shows:
Fig. 1
a partial longitudinal sectional view of a belt for a machine for producing web material in a connection zone;
Fig. 2
the in Fig. 1 shown part of the strip after generation of cross-sectional widenings at the thread ends.

In Fig. 1 ist ein Band für eine Maschine zur Herstellung von Bahnmaterial allgemein mit 10 bezeichnet. Dieses Band, das beispielsweise in einer Presssektion oder einer Trockensektion eingesetzt werden kann, umfasst einen Bandkörper 12, der im dargestellten Beispiel mit einer Gewebelage 14 aufgebaut ist. Diese Gewebelage 14 umfasst in einer Bandlängsrichtung verlaufende Längsfäden 16 sowie quer dazu, also im Wesentlichen in einer Bandquerrichtung verlaufende Querfäden 18. Bei Herstellung dieses Bandkörpers können vorteilhafterweise die Längsfäden 16 Kettfäden sein, während die Querfäden 18 Schussfäden sind. Auf diese Art und Weise wird es möglich, bei vorgegebener Breite eines derartigen Bandes 10 dieses mit nahezu beliebiger Länge zu weben.In Fig. 1 For example, a belt for a machine for making web material is generally designated 10. This band, which can be used, for example, in a press section or a dry section, comprises a band body 12, which in the example shown is constructed with a fabric layer 14. This fabric layer 14 comprises longitudinal yarns 16 running in a band longitudinal direction and transverse yarns 18, ie substantially transverse in a ribbon transverse direction. When this band body is produced, the longitudinal yarns 16 can advantageously be warp yarns, while the transverse yarns are weft yarns. In this way, it becomes possible to weave this with almost any length for a given width of such a band 10.

Um das Band 10 in einer Endloskonfiguration bereitstellen zu können, wird der Bandkörper 12 beim Webvorgang so gewebt, dass an seinen beiden Endbereichen 20, 22 die Längsfäden 16, also beispielsweise Kettfäden, mit überstehenden, also nicht mit Querfäden 18, beispielsweise Schussfäden, verwobenen Endbereichen 24 bzw. 26 bereitgestellt sind. Es sei hier beispielsweise angenommen, dass die beiden erkennbaren Endbereiche 24 und 26 an den Enden 20, 22 des Bandkörpers 14 jeweilige Endbereiche desselben Längsfaden 16 sind, was selbstverständlich nicht zwingend der Fall sein muss. Diese Endbereiche 24, 26 der bzw. aller Längsfäden 16 werden dann zum Erzeugen einer Verbindungszone V mit Verbindungs-Querfäden VQ verwoben. Im dargestellten Beispiel umfasst die Verbindungszone V die Verbindungs-Querfäden 1, 2, 3, 4 und 5. In der Verbindungszone V wird also durch die Endbereiche 24 und 26 der Längsfäden 16 und die Verbindungs-Querfäden VQ eine Gewebestruktur erhalten, die vorzugsweise der Gewebestruktur, die im verbleibenden Bandkörper 12 vorhanden ist, entspricht, so dass über die gesamte Länge des nunmehr in Endloskonfiguration bereitgestellten Bandes 10 gleichmäßige Oberflächeneigenschaften vorhanden sind.In order to be able to provide the band 10 in an endless configuration, the band body 12 is woven during the weaving process so that the longitudinal threads 16, ie, for example warp threads, have interwoven end regions at their two end regions 20, 22, ie, with transverse threads 18, for example weft threads 24 and 26 are provided. For example, it is assumed here that the two recognizable end regions 24 and 26 at the ends 20, 22 of the band body 14 are respective end regions of the same longitudinal thread 16, which of course does not necessarily have to be the case. These end portions 24, 26 of the or each longitudinal thread 16 are then interwoven to form a connection zone V with connecting transverse threads VQ. In the illustrated example, the connection zone V comprises the connecting transverse threads 1, 2, 3, 4 and 5. In the connection zone V, therefore, a fabric structure, preferably the fabric structure, is obtained by the end regions 24 and 26 of the longitudinal threads 16 and the connecting transverse threads VQ , which is present in the remaining band body 12 corresponds, so that over the entire length of the band 10 now provided in endless configuration uniform surface properties are present.

Man erkennt in Fig. 1, dass bei der Erzeugung der Verbindungszone V Fadenenden 28 bzw. 30 der Längsfäden 16 bzw. der Endbereiche 24, 26 derselben über die Oberfläche der einzigen Gewebelage 14 des EndlosBandes 10 überstehen. Um grundsätzlich Markierungseffekte in dem zu fertigenden bzw. zu transportierenden Bahnmaterial zu vermeiden, kann vorgesehen sein, dass diese Fadenenden 28 bzw. 30 an derjenigen Seite des Bands 10 hervorstehen, die nicht in Kontakt mit dem Bahnmaterial tritt. Gleichwohl hat sich gezeigt, dass vor allem in den thermisch stärker belasteten Randbereichen eines derartigen Transportbandes die Gefahr besteht, dass die Fadenenden 28, 30 sich im Laufe der Betriebslebensdauer aus den durch diese umgebende Längs- und Querfäden gebildeten Fadenzwischenräumen herausschlüpfen und somit zu einem ausgefransten Erscheinungsbild führen.One recognizes in Fig. 1 in that during the production of the connecting zone V thread ends 28 and 30 of the longitudinal threads 16 and of the end regions 24, 26 of the same extend beyond the surface of the single fabric layer 14 of the endless belt 10. In order to avoid basically marking effects in the web material to be manufactured or transported, it can be provided that these thread ends 28 and 30 protrude at that side of the band 10 which does not come into contact with the web material. Nevertheless, it has been found that, especially in the thermally more heavily loaded edge regions of such a conveyor belt, there is the danger that the thread ends 28, 30 will slip out of the thread spaces formed by the longitudinal and transverse threads surrounding them over the course of the operating life and thus to a frayed appearance to lead.

Um diesem Problem entgegenzutreten, werden bei dem erfindungsgemäßen Band 10 im Bereich dieser Fadenenden 28 bzw. 30 in nachfolgend beschriebener Art und Weise Querschnittserweiterungen gebildet. Dabei wird zunächst nach dem Erzeugen der Verbindungszone V durch den Einsatz von am Fadenende 28 in Fig. 1 erkennbaren Schneidwerkzeugen 32 dafür gesorgt, dass, wie anhand des Fadenendes 30 bereits erkennbar, diese nur mit einem vorbestimmten Ausmaß über die Gewebelage 14 hervorstehen. Dieses vorbestimmte Ausmaß kann, selbstverständlich auch abhängig von der Dicke der Längsfäden 16, im Bereich von 3 bis 5mm liegen. Nachdem zumindest in denjenigen Bereichen, in welchen Querschnittserweiterungen zu bilden sind, also beispielsweise dem Randbereich eines derartigen Bandes 10, die Fadenenden 28 bzw. 30 auf diese vorbestimmte Länge gekürzt worden sind bzw. bereits beim Verbindungsvorgang mit derartiger Länge bereitgestellt worden sind, werden dann an diesen Fadenenden 28 bzw. 30 die Querschnittserweiterungen vorgesehen. Dies kann bei Einsatz von Längsfäden 16 mit thermoplastischem Aufbaumaterial, beispielsweise Polyethylen, dadurch erfolgen, dass durch ein in Fig. 2 angedeutetes Werkzeug 24, beispielsweise ein der Spitze eines Lötkolbens, auf die Fadenenden 28 bzw. 30 eingewirkt wird. So kann durch Drücken auf diese Fadenenden 28, 30 dafür gesorgt werden, dass diese abgeflacht und aufgeweitet werden, so dass sich dann die in Fig. 2 erkennbaren Querschnittserweiterungen 36, 38 bilden. Da auch im Bereich der Fadenden 28, 30 die Längsfäden 16 jeweils unmittelbar durch andere Längsfäden bzw. Querfäden umgeben sind, werden sich bei entsprechender Druckbelastung durch das Werkzeug 34 die Querschnittserweiterungen 36, 38 so bilden, dass sie sich an die Form der umgebenden Fäden anpassen. Dies bedeutet, dass die Querschnittserweiterungen eine Abmessung aufweisen werden, die größer ist, als ein jeweiliger Gewebezwischenraum, in welchem ein eine derartige Querschnittserweiterung 36 bzw. 38 aufweisender Längsfaden 16 sich zwischen den ihn umgebenden weiteren Längsfäden 16 bzw. Querfäden 18 erstreckt. Auf diese Art und Weise kann zuverlässig dafür gesorgt werden, dass so behandelte Fadenenden 28 bzw. 30 nicht mehr aus der Gewebestruktur herausschlüpfen können. Weiterhin kann auf diese Art und Weise dafür gesorgt werden, dass die Fadenenden 28, 30 nicht mehr über die Oberfläche des Bandes 10 hervorstehen, so dass auch dann, wenn die Seite der Gewebelage 14, an welcher diese Querschnittserweiterungen 36, 38 vorhanden sind, in Kontakt mit ein derartiges Band führenden bzw. vorantreibenden Walzen ist, nachteilhafte Wechselwirkungen, die beispielsweise zu einer Laufunruhe führen könnten, vermieden werden.To counteract this problem, cross-sectional widenings are formed in the band 10 according to the invention in the area of these thread ends 28 and 30 in the manner described below. It is first after the generation of the connection zone V by the use of the thread end 28 in Fig. 1 recognizable cutting tools 32 ensured that, as already apparent from the thread end 30, they project beyond the fabric layer 14 only to a predetermined extent. This predetermined extent may of course also be dependent on the thickness of the longitudinal threads 16 in the range of 3 to 5 mm. After at least in those areas in which cross-sectional enlargements are to be formed, for example, the edge region of such a belt 10, the thread ends 28 and 30 have been shortened to this predetermined length or have already been provided in the connection process with such length, then become These thread ends 28 and 30, the cross-sectional extensions provided. When using longitudinal threads 16 with thermoplastic construction material, for example polyethylene, this can be achieved by providing a by in Fig. 2 indicated tool 24, for example one of the tip of a soldering iron, on the Thread ends 28 and 30 is acted upon. Thus, by pressing on these thread ends 28, 30 can be ensured that they are flattened and widened, so that then the in Fig. 2 recognizable cross-sectional extensions 36, 38 form. Since even in the area of the thread ends 28, 30 the longitudinal threads 16 are each directly surrounded by other longitudinal threads or transverse threads, the cross-sectional widenings 36, 38 will form with appropriate pressure loading by the tool 34 so that they conform to the shape of the surrounding threads , This means that the cross-sectional enlargements will have a dimension which is greater than a respective tissue interspace in which a longitudinal thread 16 having such a cross-sectional widening 36 or 38 extends between the further longitudinal threads 16 or transverse threads 18 surrounding it. In this way it can be reliably ensured that thus treated thread ends 28 and 30 can no longer slip out of the fabric structure. Furthermore, it can be ensured in this way that the thread ends 28, 30 no longer protrude beyond the surface of the belt 10, so that even if the side of the fabric layer 14, on which these cross-sectional extensions 36, 38 are present in Contact with such a belt leading or propelling rollers is to avoid adverse interactions, which could for example lead to a rough running.

Wie bereits vorangehend dargelegt, ist es selbstverständlich möglich, eine derartige Behandlung auf diejenigen Bereiche der Verbindungszone V zu beschränken, in welchen die Gefahr des Herausschlüpfens der Bandenden besonders groß ist, also beispielsweise die Randbereiche. In dem dazwischen liegenden Bereich, der auch in Kontakt mit dem zu fertigenden Bahnmaterial tritt, kann beispielsweise auf diese Behandlung verzichtet werden. Dort können beispielsweise die Bandenden 28 bzw. 30 noch weiter gekürzt werden, da kein Material zur Erzeugung der Querschnittserweiterungen vorgehalten werden muss. Weiterhin sei darauf hingewiesen, dass nicht notwendigerweise bei der vorangehend beschriebenen thermischen Behandlung die Querschnittserweiterung durch Pressen eines heißen Werkzeugs auf ein jeweiliges Bandende erzeugt werden müssen. Auch bereits ein leichter Kontakt und eine entsprechende Erwärmung eines derartigen Fadenendes können zur Folge haben, dass diese sich unter Bildung einer kugelartigen Querschnittserweiterung zurückzieht, so dass diese kugelartige Querschnittserweiterung im Wesentlichen vollständig innerhalb der Dicke der einzigen Gewebelage 14 liegt.As already stated above, it is of course possible to limit such treatment to those areas of the connection zone V in which the risk of slipping out of the tape ends is particularly great, so for example, the edge regions. In the intermediate region, which also comes into contact with the web material to be produced, for example, this treatment can be dispensed with. There, for example, the band ends 28 and 30 can be cut even further, since no material for generating the cross-sectional enlargements must be kept. Furthermore, it should be noted that not necessarily in the above-described thermal treatment the cross-sectional widening must be generated by pressing a hot tool on a respective end of the tape. Already a slight contact and a corresponding heating of such a thread end can have the result that it retracts to form a spherical cross-sectional widening, so that this spherical cross-sectional widening is substantially completely within the thickness of the single fabric layer 14.

Bei einer alternativen Ausgestaltungsart ist es möglich, dass derartige Querschnittserweiterungen nicht durch thermische Behandlung, sondern durch Verknotung, also das Bilden von Knoten an den Fadenenden, erzeugt werden. Auch in diesem Falle bilden die Querschnittserweiterungen also einen integralen Bestandteil der Längsfäden 16 selbst, da sie auch aus deren Aufbaumaterial, wenngleich durch mechanische Behandlung, bereitgestellt sind.In an alternative embodiment, it is possible that such cross-sectional enlargements are not generated by thermal treatment, but by knotting, so forming nodes at the thread ends. In this case, too, the cross-sectional enlargements thus form an integral part of the longitudinal threads 16 themselves, since they are also made of their structural material, albeit by mechanical treatment.

Bei einer weiteren alternativen Ausgestaltungsart ist es möglich, an den Fadenenden kleine klemmenartige bzw. klammerartige Organe anzubringen, die an den Fadenenden 28 bzw. 30 festgeklemmt werden und somit im Bereich dieser Fadenenden dann für eine Querschnitsserweiterung sorgen und das Herausschlüpfen der Fadenenden aus den Gewebezwischenräumen verhindern können. Es ist selbstverständlich, dass über die Breite eines derartigen Bandes 10 auch verschiedene Arten von Querschnittserweiterungen vorgesehen sein können. Weiter sei darauf hingewiesen, dass derartige Querschnittserweiterungen selbstverständlich auch dann bereitgestellt werden können, wenn ein derartiges Band mit mehr als einer Gewebelage aufgebaut ist, also beispielsweise eine bahnmaterialseitige Gewebelage und eine maschinenseitige Gewebelage vorgesehen sind, die miteinander durch separate oder ggf. auch Struktur bildende Bindefäden verbunden sind.In a further alternative Ausgestaltungsart it is possible to attach small clip-like or staple-like organs to the yarn ends, which are clamped to the yarn ends 28 and 30 and thus in the area of these thread ends then provide a Querschnitsserweiterung and prevent the hatching out of the fabric interstices can. It will be understood that across the width of such tape 10, various types of cross-sectional enlargements may be provided. It should also be pointed out that such cross-sectional enlargements can of course also be provided if such a band is constructed with more than one fabric layer, ie, for example, a web material-side fabric layer and a machine-side fabric layer are provided, which bind to each other by separate or possibly also structure-forming binding threads are connected.

Claims (13)

  1. Belt for a machine for producing web material, in particular paper or board, comprising at least one fabric layer (14) having longitudinal filaments (16) running substantially in a belt longitudinal direction and transverse filaments (18) running substantially in a belt transverse direction, end regions (24, 26) of the longitudinal filaments (16) being woven with transverse connecting filaments (VQ) in order to provide an endless configuration of the belt (10), characterized in that cross-sectional widenings (36, 38) are provided at the filament ends (28, 30) of at least some of the longitudinal filaments (16) woven with transverse connecting filaments (VQ).
  2. Belt according to Claim 1, characterized in that the cross-sectional widenings (36, 38) form an integral constituent part of the longitudinal filaments (16).
  3. Belt according to Claim 1 or 2, characterized in that at least some of the cross-sectional widenings (36, 38) are formed by knotting the filament ends (28, 30).
  4. Belt according to one of Claims 1 to 3, characterized in that at least some of the cross-sectional widenings (36, 38) are formed by deforming the filament ends (28, 30).
  5. Belt according to Claim 4, characterized in that at least some of the longitudinal filaments (16) provided with cross-sectional widening are constructed from thermoplastic material, and characterized in that the cross-sectional widenings (36, 38) are formed by hot deformation.
  6. Belt according to one of Claims 1 to 5, characterized in that at least some of the cross-sectional widenings are formed by fitting clamping elements to the filament ends (28, 30).
  7. Belt according to one of Claims 1 to 6, characterized in that longitudinal filaments (16) are provided with cross-sectional widening (36, 38) substantially only in edge regions of the belt (10).
  8. Belt according to one of Claims 1 to 7, characterized in that the cross-sectional widenings (36, 38) at the filament ends (28, 30) are dimensioned in such a way that they are larger than the fabric interspaces produced in the region of such filament ends (28, 30) by filaments (16, 18) surrounding the latter.
  9. Belt according to one of Claims 1 to 8, characterized in that the longitudinal filaments (16) are warp filaments and characterized in that the transverse filaments (18) are weft filaments.
  10. Belt according to one of Claims 1 to 9, characterized in that the belt (10) is provided for use in a press section of a machine for producing web material.
  11. Belt according to one of Claims 1 to 9, characterized in that the belt (10) is provided for use in a drying section of a machine for producing web material.
  12. Process for the production of a belt for a machine for producing web material, in particular paper or board, in particular according to one of the preceding claims, comprising the measures:
    a) producing a belt body (12) comprising at least one fabric layer (14) having longitudinal filaments (16) running substantially in a belt longitudinal direction and transverse filaments (18) running substantially in a belt transverse direction in such a way that, at belt body ends (20, 22), the longitudinal filaments (16) project with end regions (24, 26);
    b) weaving the end regions (24, 26) of the longitudinal filaments (16) at the belt body ends (20, 22) with transverse connecting filaments (VQ) in order to provide an endless configuration of the belt (10);
    and characterized by
    c) providing cross-sectional widenings (36, 38) at filament ends (28, 30) of at least some of the longitudinal filaments (16).
  13. Process according to Claim 12, characterized in that, after the measure b) has been carried out and before the measure c) is carried out, the filament ends (28, 13) of the longitudinal filaments (16) are shortened to a predetermined excess dimension.
EP20070114378 2006-09-08 2007-08-15 Belt for a machine for manufacturing sheet material, in particular paper or cardboard and method for manufacturing such a belt Revoked EP1897980B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07114378T PL1897980T3 (en) 2006-09-08 2007-08-15 Belt for a machine for manufacturing sheet material, in particular paper or cardboard and method for manufacturing such a belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610042812 DE102006042812A1 (en) 2006-09-08 2006-09-08 Belt for a machine for producing web material, in particular paper, cardboard or tissue, and method for producing such a belt

Publications (2)

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EP1897980A1 EP1897980A1 (en) 2008-03-12
EP1897980B1 true EP1897980B1 (en) 2010-05-26

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EP20070114378 Revoked EP1897980B1 (en) 2006-09-08 2007-08-15 Belt for a machine for manufacturing sheet material, in particular paper or cardboard and method for manufacturing such a belt

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US (1) US7918970B2 (en)
EP (1) EP1897980B1 (en)
AT (1) ATE469254T1 (en)
DE (2) DE102006042812A1 (en)
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PL (1) PL1897980T3 (en)

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Publication number Priority date Publication date Assignee Title
DE102007008500A1 (en) * 2007-02-21 2008-08-28 Voith Patent Gmbh press belt
US8597468B2 (en) * 2011-12-05 2013-12-03 Voith Patent Gmbh Joining process for a papermachine clothing
US10696008B2 (en) 2013-03-15 2020-06-30 Rolls-Royce Corporation Textile material joining technique
DE102014111881A1 (en) 2014-08-20 2016-02-25 Klaus Schmitt Beteiligungsgesellschaft Mbh Aqueous waterproofing agent for fabrics of hydrophobic thermoplastic materials and products made therefrom
CN106414830A (en) * 2016-03-23 2017-02-15 许长云 Dry fabric edge-sealing method

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE615628C (en) * 1932-08-20 1935-07-09 Comp Generale Electricite Connection for endless metal screens for the production of coarse paper and cardboard
US3109219A (en) * 1961-06-21 1963-11-05 Cheney Bigelow Wire Works Inc Seam structure for fourdrinier type screen fabric and method of making same
US3335986A (en) * 1965-09-01 1967-08-15 Fabric Res Lab Hand laced seams
US3366355A (en) * 1965-10-13 1968-01-30 Appleton Wire Works Corp Seam for woven metal or plastic fabric for papermaking machines
DE2902880C2 (en) * 1979-01-25 1985-10-03 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Process for making a multilayer dewatering screen endless and dewatering screen produced according to this process
FR2578869B1 (en) * 1985-03-12 1988-09-30 Binet Feutres Sa JUNCTION DEVICE FOR WET PRESS FELT AND STATIONARY CANVAS.
SE468052B (en) * 1991-03-05 1992-10-26 Scandiafelt Ab SHARP FOR WOVEN
US7005038B2 (en) * 2001-10-05 2006-02-28 National Wire Fabric, Inc. Belt-machine combination
US6875315B2 (en) * 2002-12-19 2005-04-05 Kimberly-Clark Worldwide, Inc. Non-woven through air dryer and transfer fabrics for tissue making
US7897018B2 (en) * 2007-09-05 2011-03-01 Albany International Corp. Process for producing papermaker's and industrial fabrics

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US20080064281A1 (en) 2008-03-13
DE102006042812A1 (en) 2008-03-27
ES2344720T3 (en) 2010-09-03
US7918970B2 (en) 2011-04-05
PL1897980T3 (en) 2010-10-29
ATE469254T1 (en) 2010-06-15
EP1897980A1 (en) 2008-03-12
DE502007003910D1 (en) 2010-07-08

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