EP1746202B1 - Method for manufacturing a paper machine screen - Google Patents
Method for manufacturing a paper machine screen Download PDFInfo
- Publication number
- EP1746202B1 EP1746202B1 EP06116125A EP06116125A EP1746202B1 EP 1746202 B1 EP1746202 B1 EP 1746202B1 EP 06116125 A EP06116125 A EP 06116125A EP 06116125 A EP06116125 A EP 06116125A EP 1746202 B1 EP1746202 B1 EP 1746202B1
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- European Patent Office
- Prior art keywords
- warp
- repeat
- warp thread
- threads
- draft
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000004744 fabric Substances 0.000 claims description 48
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract 1
- 238000009941 weaving Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- D21F1/0036—Multi-layer screen-cloths
Definitions
- the present invention relates to a method for producing a papermaker's fabric having a paper-side layer of weft threads and a running side layer of weft threads and at least two warp thread systems interwoven in each case with the paper-side weft threads and / or the weft side weft threads.
- Such papermaking fabrics serve to receive the papermaking stock, generally in the form of a fiber suspension, from a feed system.
- This base material is distributed flat on such a paper machine screen or between two such paper machine screens.
- water can be withdrawn through existing in such a sieve openings of the fiber suspension.
- An essential requirement of such paper machine fabrics is that the paper produced therewith displays as little as possible the fabric structure of the paper-side fabric layer. That is, it should be possible to obtain a smooth as possible, structure-free paper surface.
- a paper-side fabric layer includes a paper-side layer of weft yarns interwoven with warp yarns of a first warp yarn system associated with the paper-side fabric layer.
- a second fabric layer comprises running weft threads which are interwoven with the warp threads of a second warp thread system assigned to the running side fabric layer.
- binding weft threads are present, which set alternately on warp threads of the running side fabric layer and warp threads of the paper-side fabric layer.
- binding warp threads here, ie to provide a further warp thread system ensuring the mutual connection of the two fabric layers.
- the WO 02/00996 A1 discloses a papermaker's fabric also with two plies of weft yarns, namely a paper side ply with somewhat thinner weft yarns and a running side ply with somewhat thicker weft yarns.
- Two warp thread systems are provided so that the warp yarns of one system and the warp yarns of the other system are paired with each other, and these respective pairs of warp yarns of two different warp yarn systems alternate with each other in their integration with the weft yarns on the side and weft yarns on the paper side , so that on the one hand on the paper side, a very fine fabric structure is obtained, for example, with plain weave, on the other hand at the same time, however, a connection of the two fabric layers is achieved by these threads.
- the US 2,792,851 discloses a method of producing a low shrinkage tissue.
- this object is achieved by a method for producing a papermaking fabric having a paper-side layer of weft threads and a running side layer of weft threads and at least two interwoven each with the paper-side weft threads and / or the running side weft yarn warp threads, each Kettfadensys tem is associated with a group of shafts through which the warp threads of the warp yarn systems are to be shed, the method comprising creating a draft scheme with a pull-in repeat for the warp yarn systems, in which pull-in repeat for at least one of the warp yarn systems repeating in the pull-in repeat is provided.
- the method according to the invention is based on the finding that the development of stresses within a papermaking screen is an essential factor contributing to the generation of markings in the paper.
- This development of stresses which is essentially supported by very uniform patterns or high symmetries, is inventively counteracted by the fact that already in the definition of the feeder, ie the assignment of the individual warp threads of the various warp thread systems to certain shafts, the structure of defined voltages a targeted irregularity is counteracted.
- the drawing repeat for at least one warp thread no Unterrapport be provided.
- the collection pattern is repeated only by joining several collection reports within the collection scheme, but not within each individual collection repeat.
- a repetitive sub-repeat is provided for the retraction repeat for at least two warp thread systems and that the numbers of repetitions of the sub-rapport in the retraction repeat differ. Even if in each case at least two warp thread systems, in each case, subreports are provided within a catchment repeat, but these have a different number of repetitions within the catchment repeat or each Einzugsrapportes occur, a nonuniformity can be achieved within the Einzugsrapportes.
- the catchment repeat at least the group of shafts, which are assigned to a warp thread system, comprises shanks following one another in the warp direction.
- the draw-in pattern or draw-in scheme can be further varied in the direction of greater non-uniformity, if in the pull-in repeat at least the two different warp thread systems associated groups of shanks in the warp direction are nested.
- At least one shank is associated with two warp threads of the same warp thread system in the pull-in repeat.
- this depends greatly on the binding structure to be achieved in the fabric layers.
- the process according to the invention can be used to particular advantage in the production of paper machine fabrics on weaving machines with at least 25 shafts, preferably with at least 27 shanks and particularly preferably with at least 30 shanks.
- the present invention further relates to a papermaker's fabric made by a process according to the invention.
- a papermaking fabric manufacturable in accordance with the principles of the present invention is shown in fragmentary and longitudinal warp longitudinal section and indicated generally at 110.
- This paper machine screen is constructed with two fabric layers 112, 114.
- the fabric layer 112 is a paper-side fabric layer, that is, at the in Fig. 1 On the upper side, that surface is ready, on which the fiber suspension used for papermaking is applied and subsequently the paper is formed.
- the fabric layer 114 is to be interpreted as a running fabric layer. This fabric layer thus interacts with the paper machine screen 110 leading or also driving wheels or rollers.
- the fabric layer 112 comprises a paper-side layer of weft threads 116, while the fabric layer 114 comprises a running side layer of weft threads 118.
- these weft threads 116 and 118 extend essentially transversely to the production direction of the papermaking wire 110.
- a first warp thread system 120 with warp threads 122 is also provided. These warp threads 122 are interwoven with the weft threads 116 of the paper side layer of weft threads, wherein, for example, the weft threads 116 can realize a plain weave, a twill weave or the like with the warp threads 122 of the first warp thread system 120 lying next to one another in the weft direction.
- the running-side fabric layer 114 comprises, in addition to the run-side position of weft threads 118, a second warp thread system 124 with warp threads 126. These warp threads 126 are connected to the weft threads 118 of the running side layer of FIG Woven threads interwoven, in which case a bond pattern may be selected, which is best suited to the particular occurring in terms of mechanical stress and abrasion on the running side requirements.
- a third warp yarn 128 is provided with warp threads 130.
- shedding machines 122, 126, 130 of the various warp yarn systems 120, 124, 128 are generally used to shed machines having a plurality of shafts sequentially arranged in the warp direction for shedding the warp yarns 122, 126.
- shafts A, B and C are in the Fig. 1 schematically shafts A, B and C indicated.
- the shaft A symbolically representative of a group of shanks explained in greater detail below interacts with the warp thread 122 of the first warp thread system 120.
- this warp thread 122 is passed through an eyelet 132 of a strand 134 of the shaft A.
- the shank B cooperates with the warp yarn 130 of the third warp yarn system 128, since this warp yarn 130 is passed through an eyelet 136 of a strand 138 of the shank B.
- the shank C cooperates with the warp yarn 126 of the second warp yarn system 124 by passing this warp yarn 126 through an eyelet 140 of a strand 142 of this shank C.
- these shafts A, B and C are occupied in the height direction, so that with a respective Shank cooperating warp thread with respect to a weft to be introduced in the correct plane, ie above or below to position.
- the number of shanks to be provided or used for the shedding depends on the pattern of bonding to be realized. It may be necessary, on the one hand, to provide a separate shaft for each warp thread of a particular warp thread system within a weave repeat viewed in the weft direction in order to be able to move this warp thread independently of all other warp threads of this warp thread system and, on the other hand, separate groups of shafts for the different warp thread systems in order to be able to move the respective warp threads defining or associated with the respective warp threads independently of the warp threads of other warp thread systems for shedding.
- those are in the Fig. 1 shown shafts A, B and C representatively for each of the individual warp systems associated groups of shafts, which must include at least two shafts, in general, as explained below, but more than two shafts include.
- FIG. 12 illustrates the weaving scheme constructed in accordance with the principles of the present invention, for example, in FIG Fig. 1 illustrated paper machine screen. It is in Fig. 2 a pull-in repeat is shown, ie a section viewed in the weft direction, which then represents a unit repeating itself in the direction of the shot, that is to say several times in a row.
- a pull-in repeat is shown, ie a section viewed in the weft direction, which then represents a unit repeating itself in the direction of the shot, that is to say several times in a row.
- the horizontal rows of boxes, numbered 1-25 correspond to the shafts used to make them. This means that 25 shafts are used in the illustrated case.
- the vertical columns of boxes each represent a warp thread, in which case a collection repeat comprises 48 warp threads.
- each selected box represents the interaction of a particular warp with a particular stock.
- the shaft 1 interacts with the warp threads 17 and 41.
- these warp threads 17 and 41 are each guided by loops of strands of the shaft 1, so that during a vertical movement of the shaft 1, these two warp threads 17 and 41 are moved to shedding.
- the warp threads are the ones referred to above Fig. 1 already explained three warp threads 120, 124 and 128 shown with different patterns.
- the warp yarns numbered 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45 illustrated with checkered patterns or intersecting lines are the warp yarns of the first warp yarn system 120, ie those which together with the weft threads 16 form the paper-side fabric layer.
- the warp threads 4, 10, 15, 18, 24, 28, 34, 39, 42 and 48 shown with oblique hatching are the warp threads of the second warp thread system 124, ie those warp threads which together with the weft threads 118 form the running side fabric layer 114.
- the remaining warp threads ie the black-marked warp threads 2, 3, 6, 7, 8, 11, 12, 14, 16, 19, 20, 22, 23, 26, 27, 30, 31, 32, 35, 36, 38 , 40, 43, 44, 46, 47, are the warp threads of the third warp thread system 128, ie those warp threads which realize the mutual connection of the two fabric layers 112, 114.
- each warp yarn system 120, 124 and 128, respective groups of shafts are provided, wherein the group associated with the first warp yarn system 120 comprises the shafts 1 to 6, the group associated with the second warp yarn system 124 comprises the shafts 16 to 25 and that of the third Warp system 128 associated group comprising shafts 7 to 15.
- the stems of the individual groups in the warp direction follow each other directly, so that there is a direct and without mixing existing sequence of these three groups of shafts 1 to 6, 7 to 15 and 16 to 25.
- the retract repeat illustrated in FIG. 1 illustrates that this repeating smallest unit of the retraction scheme for all three warp thread systems 120, 124 and 128 is associated with the two warp thread systems 120 and 128, ie the warp yarns shown in checkered pattern and the warp yarns shown in black. That is, within the pull-in repeat defined for all three warp thread systems is 120 and 128 respectively for the two warp thread systems an even smaller repeating pattern unit exists.
- the associated lower repeat comprises six warp yarns, that is, for example, the warp yarns 1, 5, 9, 13, 17, and 21.
- the subreport associated with the first warp threading system 120 is present twice.
- the assigned subreport is present twice within the catchment repeat, once with the warp threads 2, 3, 6, 7, 8, 11, 12, 14, 16, 19, 20, 22 23.
- the second repetition then has the warp thread 26 as the first warp thread occurring in the numbering sequence and furthermore comprises the warp threads 27, 30, 31, 32, 35, 36, 38, 40, 43, 44, 46, 47.
- Such a pattern repeating within the draw repeat does not exist in the second warp thread system, ie the warp threads interacting with the shafts 16 to 25.
- the next repetition actually takes place only at the next repetition of the catchment repeat, which ultimately also serves as the basis for the catch repeat comprising all three warp thread systems 120, 124 and 122 extending over the warp threads 1 to 48.
- a catchment repeat only in association with a single of the three warp yarns 120, 124 and 128 may be provided a subreport, while repeated in the other two warp yarns, the collection pattern only every 48 threads.
- the division of the sub-report or the sub-reports with respect to the catchment report could be different. For example, a subreport could be present three times or more in the catchment repeat.
- a paper machine screen would then be produced which has no warp threads essentially serving only the mutual connection of the fabric plies 112, 114, but a papermaking fabric in which the warp threads of the two warp thread systems woven together with the weft threads simultaneously the connection is made.
- a subreport exists in association with the first warp thread system 120, namely a subreport occurring twice in the pull-in repeat, while no subreport is present in association with the second warp thread system 124.
- FIG. 3 Another variation is in Fig. 3 illustrated.
- the shanks of the different groups of shanks cooperating with the warp threads of the different warp thread systems do not define a warp-sequential block formation, but that a nesting of the individual groups is present.
- the shafts 3, 6, 9, 12, 15 and 18 are effective in association with the first warp thread system 120, ie the warp threads illustrated with crossed lines.
- the shafts 14, 16, 17 and 19 to 25 are effective while in association with the third warp thread system 128, ie the warp threads realizing the mutual connection of the fabric layers 112, 114 that shafts 1, 2, 4, 5, 7, 8, 10, 11 and 13 are effective. Nonetheless, here as well, in association with the warp threads of the first warp thread system 120 and the warp threads of the third warp thread system 128, a repeat repeat is present in the repeat pattern, whereas this is not the case with the warp threads of the second warp thread system 124.
- Fig. 2 and 3 show that shafts can interact with a single warp thread or can cooperate with several warp threads. This will depend primarily on which weave pattern is to be weaved and which of the warp threads for this purpose are always to move together to shed training. In general, it will be advantageous to keep the number of shafts used as low as possible, so that, if possible, as many warp threads should cooperate with a shaft. It should be understood, of course, that due to the fact that the warp threads of different warp thread systems are basically to be moved independently of each other, a shaft actually only ever cooperates with warp threads of a warp thread system.
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Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Papiermaschinensiebes mit einer papierseitigen Lage von Schussfäden und einer laufseitigen Lage von Schussfäden und wenigstens zwei jeweils mit den papierseitigen Schussfäden oder/und den laufseitigen Schussfäden verwobenen Kettfadensystemen.The present invention relates to a method for producing a papermaker's fabric having a paper-side layer of weft threads and a running side layer of weft threads and at least two warp thread systems interwoven in each case with the paper-side weft threads and / or the weft side weft threads.
Derartige Papiermaschinensiebe dienen dazu, bei der Papierherstellung das im Allgemeinen als Fasersuspension vorliegende Papiergrundmaterial von einem Zuführsystem aufzunehmen. Dieses Grundmaterial wird auf einem derartigen Papiermaschinensieb bzw. zwischen zwei derartigen Papiermaschinensieben flächig verteilt. Bei der weiteren Fertigung kann durch die in einem derartigen Sieb vorhandenen Öffnungen der Fasersuspension Wasser entzogen werden. Eine wesentliche Anforderung an derartige Papiermaschinensiebe ist, dass das damit hergestellte Papier die Gewebestruktur der papierseitigen Gewebelage möglichst wenig abbildet. Das heißt, es soll eine möglichst glatte, strukturfreie Papieroberfläche erhalten werden.Such papermaking fabrics serve to receive the papermaking stock, generally in the form of a fiber suspension, from a feed system. This base material is distributed flat on such a paper machine screen or between two such paper machine screens. In the further production of water can be withdrawn through existing in such a sieve openings of the fiber suspension. An essential requirement of such paper machine fabrics is that the paper produced therewith displays as little as possible the fabric structure of the paper-side fabric layer. That is, it should be possible to obtain a smooth as possible, structure-free paper surface.
Aus der
Die
Aus der
Die
Es ist die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Herstellung eines Papiermaschinensiebes vorzusehen, das bei der Papierherstellung eine geringere Markierungsneigung aufweist.It is the object of the present invention to provide a method of manufacturing a papermaking fabric which has a lower marking tendency in papermaking.
Erfindungsgemäß wird diese Aufgabe gelöst durch ein Verfahren zur Herstellung eines Papiermaschinensiebes mit einer papierseitigen Lage von Schussfäden und einer laufseitigen Lage von Schussfäden und wenigstens zwei jeweils mit den papierseitigen Schussfäden oder/und den laufseitigen Schussfäden verwobenen Kettfadensystemen, wobei jedem Kettfadensys tem eine Gruppe von Schäften zugeordnet wird, durch welche die Kettfäden der Kettfadensysteme zur Fachbildung zu bewegen sind, wobei das Verfahren das Erzeugen eines Einzugsschemas mit einem Einzugsrapport für die Kettfadensysteme umfasst, bei welchem Einzugsrapport für wenigstens eines der Kettfadensysteme ein sich in dem Einzugsrapport wiederholender Unterrapport vorgesehen ist.According to the invention, this object is achieved by a method for producing a papermaking fabric having a paper-side layer of weft threads and a running side layer of weft threads and at least two interwoven each with the paper-side weft threads and / or the running side weft yarn warp threads, each Kettfadensys tem is associated with a group of shafts through which the warp threads of the warp yarn systems are to be shed, the method comprising creating a draft scheme with a pull-in repeat for the warp yarn systems, in which pull-in repeat for at least one of the warp yarn systems repeating in the pull-in repeat is provided.
Dem erfindungsgemäßen Verfahren liegt die Erkenntnis zu Grunde, dass die Entwicklung von Spannungen innerhalb eines Papiermaschinensiebes ein wesentlicher zur Erzeugung von Markierungen im Papier beitragender Faktor ist. Dieser Entwicklung von Spannungen, die im Wesentlichen durch sehr gleichmäßige Muster bzw. hohe Symmetrien unterstützt wird, wird erfindungsgemäß dadurch entgegengewirkt, dass bereits bei der Definition des Einzugs, also der Zuordnung der einzelnen Kettfäden der verschiedenen Kettfadensysteme zu bestimmten Schäften, dem Aufbau definierter Spannungen durch eine gezielt eingeführte Unregelmäßigkeit entgegengewirkt wird. Dies bedeutet also, dass bei einem bestimmten zu webenden Bindungsmuster, das im Allgemeinen eine vergleichsweise hohe Gleichförmigkeit aufweist, ein Einzugsschema mit gezielt eingeführter bzw. erhöhter Ungleichförmigkeit überlagert wird, um somit bei der Fachbildung, welche den Spannungsverlauf innerhalb eines dann gewebten Siebes stark beeinflusst, dem Aufbau ungewünschter Spannungen innerhalb des Papiermaschinensiebes bereits entgegenzuwirken.The method according to the invention is based on the finding that the development of stresses within a papermaking screen is an essential factor contributing to the generation of markings in the paper. This development of stresses, which is essentially supported by very uniform patterns or high symmetries, is inventively counteracted by the fact that already in the definition of the feeder, ie the assignment of the individual warp threads of the various warp thread systems to certain shafts, the structure of defined voltages a targeted irregularity is counteracted. This means that for a given weave pattern, which generally has a comparatively high uniformity, a catchment pattern with deliberately introduced or increased nonuniformity is superimposed, and thus at the shedding, which strongly influences the tension course within a then woven wire, To counteract the build up of unwanted stresses within the paper machine screen already.
Beispielsweise kann bei dem erfindungsgemäßen Verfahren bei dem Einzugsrapport für wenigstens ein Kettfadensystem kein Unterrapport vorgesehen sein. Dies bedeutet also, dass bei diesem wenigstens einen Kettfadensystem das Einzugsmuster sich lediglich durch Aneinanderfügung mehrerer Einzugsrapporte innerhalb des Einzugsschemas wiederholt, nicht jedoch innerhalb jedes einzelnen Einzugsrapportes.For example, in the method according to the invention in the drawing repeat for at least one warp thread no Unterrapport be provided. This means that in this at least one warp thread system, the collection pattern is repeated only by joining several collection reports within the collection scheme, but not within each individual collection repeat.
Alternativ oder zusätzlich kann vorgesehen sein, dass bei dem Einzugsrapport für wenigstens zwei Kettfadensysteme jeweils ein sich wiederholender Unterrapport vorgesehen ist und dass die Anzahlen der Wiederholungen der Unterrapporte in dem Einzugsrapport sich unterscheiden. Auch dann, wenn also bei zumindest zwei Kettfadensystemen zwar innerhalb eines Einzugsrapportes jeweils Unterrapporte vorgesehen sind, diese aber mit verschiedener Anzahl an Wiederholungen innerhalb des Einzugsrapportes bzw. jedes Einzugsrapportes auftreten, kann eine Ungleichförmigkeit innerhalb des Einzugsrapportes erzielt werden.Alternatively or additionally, it may be provided that in each case a repetitive sub-repeat is provided for the retraction repeat for at least two warp thread systems and that the numbers of repetitions of the sub-rapport in the retraction repeat differ. Even if in each case at least two warp thread systems, in each case, subreports are provided within a catchment repeat, but these have a different number of repetitions within the catchment repeat or each Einzugsrapportes occur, a nonuniformity can be achieved within the Einzugsrapportes.
Gemäß einem weiteren Aspekt kann bei dem erfindungsgemäßen Verfahren vorgesehen sein, dass in dem Einzugsrapport wenigstens die einem Kettfadensystem zugeordnete Gruppe von Schäften in Kettrichtung unmittelbar aufeinander folgende Schäfte umfasst. Alternativ kann das Einzugsmuster bzw. Einzugsschema dadurch weiter in Richtung größere Ungleichförmigkeit variiert werden, wenn in dem Einzugsrapport wenigstens die zwei verschiedenen Kettfadensystemen zugeordneten Gruppen von Schäften in Kettrichtung ineinander geschachtelt sind.According to a further aspect, it can be provided in the method according to the invention that in the catchment repeat at least the group of shafts, which are assigned to a warp thread system, comprises shanks following one another in the warp direction. Alternatively, the draw-in pattern or draw-in scheme can be further varied in the direction of greater non-uniformity, if in the pull-in repeat at least the two different warp thread systems associated groups of shanks in the warp direction are nested.
Da im Allgemeinen versucht wird, bei der Herstellung von Papiermaschinensieben die Anzahl der eingesetzten Schäfte so gering als möglich zu halten, kann erfindungsgemäß weiter vorgesehen sein, dass bei dem Einzugsrapport wenigstens ein Schaft zwei Kettfäden des gleichen Kettfadensystems zugeordnet ist. Dies hängt selbstverständlich stark von der bei den Gewebelagen zu erzielenden Bindungsstruktur ab.Since it is generally attempted to keep the number of shafts used as low as possible in the production of paper machine screens, according to the invention it can further be provided that at least one shank is associated with two warp threads of the same warp thread system in the pull-in repeat. Of course, this depends greatly on the binding structure to be achieved in the fabric layers.
Besonders vorteilhaft kann das erfindungsgemäße Verfahren bei der Herstellung von Papiermaschinensieben auf Webmaschinen mit mindestens 25 Schäften bevorzugt mit mindestens 27 Schäften und besonders bevorzugt mit mindestens 30 Schäften zum Einsatz gebracht werden.The process according to the invention can be used to particular advantage in the production of paper machine fabrics on weaving machines with at least 25 shafts, preferably with at least 27 shanks and particularly preferably with at least 30 shanks.
Die vorliegende Erfindung betrifft ferner ein mit einem erfindungsgemäßen Verfahren hergestelltes Papiermaschinensieb.The present invention further relates to a papermaker's fabric made by a process according to the invention.
Nachfolgend wird die Erfindung mit Bezug auf die beiliegenden Zeichnungen detailliert beschrieben. Es zeigt:
- Fig. 1
- einen Schnitt durch ein mit zwei Gewebelagen hergestelltes Papiermaschinensieb in Kettrichtung;
- Fig. 2
- die Darstellung eines gemäß den Prinzipien der vorliegenden Erfindung realisierten Einzugsrapportes;
- Fig. 3
- die Darstellung eines weiteren gemäß den Prinzipien der vorliegenden Erfindung aufgebauten Einzugsrapportes.
- Fig. 1
- a section through a manufactured in two fabric layers papermaking fabric in the warp direction;
- Fig. 2
- the representation of a realized according to the principles of the present invention Einzugsrapportes;
- Fig. 3
- the representation of another Einzugsrapportes constructed according to the principles of the present invention.
In
Die laufseitige Gewebelage 114 umfasst neben der laufseitigen Lage von Schussfäden 118 ein zweites Kettfadensystem 124 mit Kettfäden 126. Diese Kettfäden 126 sind mit den Schussfäden 118 der laufseitigen Lage von Schussfäden verwoben, wobei hier ein Bindungsmuster gewählt sein kann, das den insbesondere hinsichtlich der mechanischen Beanspruchung und des Abriebs an der Laufseite auftretenden Anforderungen am besten gewachsen ist.The running-
Um bei dem in
Bei der Herstellung derartiger Papiermaschinensiebe werden zur Fachbildung der Kettfäden 122, 126, 130 der verschiedenen Kettfadensysteme 120, 124, 128 im Allgemeinen Schaftmaschinen mit einer Vielzahl an in der Kettrichtung aufeinanderfolgend angeordneten Schäften eingesetzt. Von diesen sind in der
Bevor auf einer Webmaschine ein derartiges Papiermaschinensieb 110 bei Durchführung eines Webvorgangs gewebt werden kann, ist es erforderlich, ein Einzugsschema zu generieren, also eine Zuordnung zu schaffen zwischen den jeweiligen Kettfäden der verschiedenen Kettfadensysteme und den bei einer Webmaschine vorgesehenen Schäften bzw. den Schäften der den verschiedenen Kettfadensystemen zugeordneten Gruppen von Schäften. Dies wird nachfolgend mit Bezug auf die
Die
In dem in
In der Darstellung der
Die Zusammenwirkung der Kettfäden der verschiedenen Kettfadensysteme mit den Schäften 1 bis 25 ist in dem in
Man erkennt anhand des in
Ein derartiges sich innerhalb des Einzugsrapportes wiederholendes Muster existiert bei dem zweiten Kettfadensystem, also den mit den Schäften 16 bis 25 zusammenwirkenden Kettfäden, nicht. Hier findet die nächste Wiederholung tatsächlich erst bei der nächsten Wiederholung des Einzugsrapportes statt, was letztendlich auch die Grundlage dafür ist, dass der alle drei Kettfadensysteme 120, 124 und 122 umfassende Einzugsrapport sich über die Kettfäden 1 bis 48 erstreckt.Such a pattern repeating within the draw repeat does not exist in the second warp thread system, ie the warp threads interacting with the
Durch das Bereitstellen von Unterrapporten bzw. eines Unterrapportes in Zuordnung zu wenigstens einem der Kettfadensysteme, während für zumindest ein anderes Kettfadensystem kein Unterrapport existiert und dessen Muster sich tatsächlich erst bei der nächsten Wiederholung des Einzugsrapportes wiederholt, wird ein Einzugsschema generiert, das bei einem dann durchgeführten Webvorgang dazu beiträgt, dass der Aufbau von Spannungen in einem so hergestellten Papiermaschinensieb soweit als möglich unterdrückt wird. Dem mit vergleichsweise hoher Periodizität auftretenden Bindungsmuster wird ein vergleichsweise ungeordnetes Einzugsmuster überlagert, was offensichtlich sich bei dem Verhindern derartiger Spannungen positiv auswirkt. Es sind natürlich verschiedenste Variationsmöglichkeiten denkbar. So könnte beispielsweise bei der in
Eine weitere Variationsmöglichkeit ist in
Es ist selbstverständlich, dass auch bei der in
Abschließend sei noch darauf hingewiesen, dass die
Claims (7)
- Method for manufacturing a paper machine fabric having a paper-side layer of weft threads (116) and a run-side layer of weft threads (118) and at least two warp thread systems (120, 124, 128) in each case woven with the paper-side weft threads (116) and/or the run-side weft threads (118), each warp thread system (120, 124, 128) being assigned a group of heddles, by which the warp threads of the warp thread systems (120, 124, 128) are to be moved in order to form sheds, the method comprising the production of a draft scheme having a draft repeat for the warp thread systems (120, 124, 128), in which draft repeat a sub-repeat that repeats in the draft repeat is provided for at least one of the warp thread systems (120, 124, 128).
- Method according to Claim 1, characterized in that, in the draft repeat for at least one warp thread system (124), no sub-repeat is provided.
- Method according to Claim 1 or 2, characterized in that, in the draft repeat for at least two warp thread systems, in each case a repeating sub-repeat is provided, and in that the numbers of repetitions of the sub-repeats in the draft repeat differ.
- Method according to one of Claims 1 to 3,
characterized in that, in the draft repeat, at least the group of heddles assigned to one warp thread system (120, 124, 128) comprises heddles following one another immediately in the warp direction. - Method according to one of Claims 1 to 4,
characterized in that, in the draft repeat, at least the groups of heddles assigned to two different warp thread systems (120, 124, 128) are nested in one another in the warp direction. - Method according to one of Claims 1 to 5,
characterized in that, in the draft repeat, at least one heddle is assigned to two warp threads of the same warp thread system (120, 124, 128). - Method according to one of Claims 1 to 6,
characterized in that the paper machine fabric (10) is woven on a loom having at least 25 heddles, preferably having at least 27 heddles, particularly preferably having at least 30 heddles.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005034453A DE102005034453A1 (en) | 2005-07-23 | 2005-07-23 | Method for producing a paper machine screen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1746202A1 EP1746202A1 (en) | 2007-01-24 |
EP1746202B1 true EP1746202B1 (en) | 2009-06-17 |
Family
ID=37075884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06116125A Active EP1746202B1 (en) | 2005-07-23 | 2006-06-27 | Method for manufacturing a paper machine screen |
Country Status (5)
Country | Link |
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US (1) | US7513276B2 (en) |
EP (1) | EP1746202B1 (en) |
AT (1) | ATE434078T1 (en) |
DE (2) | DE102005034453A1 (en) |
ES (1) | ES2326683T3 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005028254A1 (en) * | 2005-06-17 | 2006-12-21 | Voith Patent Gmbh | cloth tape |
DE102005034453A1 (en) * | 2005-07-23 | 2007-01-25 | Voith Patent Gmbh | Method for producing a paper machine screen |
DE102005060299A1 (en) * | 2005-12-16 | 2007-06-21 | Voith Patent Gmbh | papermaker |
DE102005060301A1 (en) | 2005-12-16 | 2007-06-21 | Voith Patent Gmbh | Paper machine clothing |
CN102660828B (en) * | 2009-12-17 | 2015-02-04 | 财团法人纺织产业综合研究所 | Stereoscopic woven fabric |
SG10201501964QA (en) * | 2010-03-16 | 2015-05-28 | Titan Pharmaceuticals Inc | Heterogeneous Implantable Devices For Drug Delivery |
DE102010026609B3 (en) * | 2010-07-09 | 2011-11-17 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Method and apparatus for weaving patterns on fabrics with added weft effects |
DE102010034969B3 (en) | 2010-08-20 | 2011-11-03 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Weaving and weaving machine for weaving patterns in fabrics with additional pattern effects |
WO2012140992A1 (en) * | 2011-04-11 | 2012-10-18 | 日本フイルコン株式会社 | Multilayer weave for nonwoven fabric |
DE202014001502U1 (en) * | 2013-03-01 | 2014-03-21 | Voith Patent Gmbh | Woven wire with flat warp threads |
Family Cites Families (19)
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US1826654A (en) * | 1927-03-04 | 1931-10-06 | Deboutteville Marcel Delamare | Process for weaving |
US2792851A (en) * | 1955-10-27 | 1957-05-21 | Pepperell Mfg Company | Blanket cloth and method of making the same |
DE3635000A1 (en) * | 1986-10-14 | 1988-04-21 | Oberdorfer Fa F | DOUBLE-LAYER PAPER MACHINE SCREEN WITH COARSE-TEXTURED RUNNING SIDE AND FINE-STRUCTURED PAPER SIDE |
DE4229828C2 (en) * | 1992-09-07 | 1996-07-04 | Kufferath Andreas Gmbh | Paper machine screen in the form of a composite fabric |
AU5104499A (en) * | 1998-07-16 | 2000-02-07 | Asten, Inc. | Soft-faced dryer fabric |
USH1974H1 (en) * | 1998-08-11 | 2001-07-03 | Astenjohnson, Inc. | Woven loop press base fabric having high density top layer |
US5988229A (en) * | 1998-08-20 | 1999-11-23 | Wangner Systems Corporation | Papermakers forming fabric with weft dominated paper support surface |
US6237644B1 (en) * | 1998-09-01 | 2001-05-29 | Stewart Lister Hay | Tissue forming fabrics |
US6148869A (en) * | 1998-12-17 | 2000-11-21 | Wangner Systems Corporation | Dual layer papermaking fabric formed in a balanced weave |
US6349749B1 (en) * | 1999-07-09 | 2002-02-26 | Geschmay Corp. | Woven fabric |
US6276402B1 (en) * | 1999-08-23 | 2001-08-21 | Astenjohnson, Inc. | Multilayer papermakers fabric |
US6413377B1 (en) * | 1999-11-09 | 2002-07-02 | Astenjohnson, Inc. | Double layer papermaking forming fabric |
US6227256B1 (en) * | 1999-12-13 | 2001-05-08 | Albany International Corp. | Multi-layer papermaking fabric having long weft floats on its support and machine surfaces |
GB0005344D0 (en) * | 2000-03-06 | 2000-04-26 | Stone Richard | Forming fabric with machine side layer weft binder yarns |
DE10030650C1 (en) | 2000-06-29 | 2002-05-29 | Kufferath Andreas Gmbh | papermaker |
DE60231041D1 (en) * | 2001-07-09 | 2009-03-19 | Astenjohnson Inc | MULTILAYER FABRIC FOR AIR DRYERS |
GB0128407D0 (en) * | 2001-11-27 | 2002-01-16 | Johnson Dale B | High support double layer forming fabric |
US6827821B2 (en) * | 2002-12-02 | 2004-12-07 | Voith Fabrics Heidenheim Gmbh & Co. Kg | High permeability, multi-layer woven members employing machine direction binder yarns for use in papermaking machine |
DE102005034453A1 (en) * | 2005-07-23 | 2007-01-25 | Voith Patent Gmbh | Method for producing a paper machine screen |
-
2005
- 2005-07-23 DE DE102005034453A patent/DE102005034453A1/en not_active Withdrawn
-
2006
- 2006-06-27 DE DE502006003973T patent/DE502006003973D1/en active Active
- 2006-06-27 EP EP06116125A patent/EP1746202B1/en active Active
- 2006-06-27 ES ES06116125T patent/ES2326683T3/en active Active
- 2006-06-27 AT AT06116125T patent/ATE434078T1/en active
- 2006-07-20 US US11/490,369 patent/US7513276B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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DE102005034453A1 (en) | 2007-01-25 |
US7513276B2 (en) | 2009-04-07 |
EP1746202A1 (en) | 2007-01-24 |
US20070028992A1 (en) | 2007-02-08 |
ES2326683T3 (en) | 2009-10-16 |
ATE434078T1 (en) | 2009-07-15 |
DE502006003973D1 (en) | 2009-07-30 |
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