EP3908694A1 - Kantenschutz für eine papiermaschinenbespannung - Google Patents
Kantenschutz für eine papiermaschinenbespannungInfo
- Publication number
- EP3908694A1 EP3908694A1 EP19820703.7A EP19820703A EP3908694A1 EP 3908694 A1 EP3908694 A1 EP 3908694A1 EP 19820703 A EP19820703 A EP 19820703A EP 3908694 A1 EP3908694 A1 EP 3908694A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- covering
- film strip
- fabric
- side edges
- edge
- 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.)
- Granted
Links
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
- 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
- D21F1/30—Protecting wire-cloths from mechanical damage
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/08—Felts
- D21F7/12—Drying
Definitions
- the invention relates to a method for producing an edge protection on a covering for a machine for producing or finishing a fibrous web, in particular a paper, cardboard or tissue web, and a covering, in particular a dryer fabric, with an edge protection produced by this method.
- a suspension of water and fibers is regularly applied in a paper machine via a headbox to a forming fabric.
- a large part of the water is removed from the suspension through the forming screen, so that the actual fibrous web is formed.
- Further sections of the paper machine that follow the forming section regularly include further coverings that serve for the further transport and further drying of the fibrous web. These are usually press felts and dryer fabrics.
- the various coverings are mostly designed as a fabric in which crossing weft and warp threads are connected or woven together.
- the fabrics can be single or multi-layer. They can also have other layers, such as a staple fiber layer, for example to form a press felt.
- the coverings are usually closed to form an endless belt and have two side edges or edges, which can also be referred to as side edges or longitudinal edges. When used as intended, they rotate at high speed over various rollers in the paper machine. In order to safely guide the covering, guide elements are used on which the lateral edges of the covering can run up. The frictional forces generated in this way, however, lead to a high load on the lateral edges of the coverings. It is therefore customary to provide them with protection to avoid premature wear.
- the covering being essentially formed from a fabric with crossing weft threads and warp threads and having two opposite side edges,
- film strip in the context of the present invention implies that the width of the film strip is significantly less than the width of the covering, the edges of which are to be protected.
- the term “melt” in the sense of the present invention means that the material of the film strip or the threads in the edge region of the covering is not completely melted, so that the film strip or the threads lose their shape, but that Material is partially softened only by the energy input. In the case of the threads in particular, it is sufficient that they are only melted on the surface.
- the film material on the other hand, can be softened over almost its entire thickness so that it can be easily pressed into the fabric. Melting, pressing in and cooling down not only result in a form-fitting connection of film strips and fabric, but also in a material-fitting connection.
- the side edge of the covering provided with the film strip is subsequently trimmed.
- Modification can either be done mechanically in a conventional manner, for example by means of a so-called “disk cutter”, or else with more modern technologies, such as, for example, using ultrasound technology.
- not only one of the two side edges of the covering is provided with edge protection in accordance with the method steps according to the invention, but both side edges.
- edge protection in accordance with the method steps according to the invention, but both side edges.
- PET stands for the abbreviation for polyethylene terephthalate.
- good test results could be achieved if the film strip has a width between 20mm and 50mm, preferably between 30mm and 40mm and / or the film strip has a thickness between 50pm and 400pm, preferably between 100pm and 350pm.
- the surface of the film strip facing the fabric and the surface of the fabric facing the film strip be heated by means of a jet of hot air, the jet of hot air preferably being directed into an inlet gap formed between the film strip and the fabric.
- the jet of hot air By directing the jet of hot air into the inlet gap, it can be ensured that, in particular, the film strip is only melted on the side facing the fabric of the covering, whereas the surface of the fabric strip facing away from the fabric can remain largely firm.
- the film strip can be easily pressed into the fabric of the covering by means of a pressing element, without the film strip hanging or sticking to the pressing element.
- the surface of the film strip facing the covering and the surface of the covering facing the film strip are heated by means of a heating wedge.
- heating wedge is understood to mean a component which is essentially wedge-shaped and which can emit heat, for example by being electrically heated itself.
- the flanks preferably come into contact with the surfaces to be heated, which are guided over the flanks of the heating wedge and according to the geometry of the Run the heating wedge towards each other in order to then be pressed against each other or pressed into each other.
- the pressing force on the film strips applied to the surface of one of the two side edges of the covering can be generated by means of a pressure roller, preferably a further roller or further pressure roller or an essentially flat plate as the counter element to the pressure roller can be used.
- the pressing force can be applied to the film strips applied to the surface of one of the two side edges of the covering by means of two wedge-shaped pressure plates, the covering together with the film strip due to a tapering gap between the two pressure plates can be performed.
- Another aspect of the present invention relates to a covering with an edge protection which has been produced by the previously described method according to the invention. Effective edge protection is particularly important for dryer fabrics in order to prevent premature wear on the edges of the dryer fabrics.
- Process, 3 shows a third exemplary embodiment of the method according to the invention.
- FIG. 4 shows a view of the covering provided with edge protection from above.
- Figure 1 illustrates a first exemplary embodiment of the method according to the invention.
- a covering 10 for example a woven dryer fabric, with an edge protector 12
- the covering 10 is first stretched over two rotatably mounted rollers, namely a first tensioning roller 14 and a second tensioning roller 16.
- a film strip 18 is then placed on a roll 20 can be wound, applied to one of the two side edges of the covering 10.
- Flierzu the film strip 18 is guided over a pressure roller 22.
- the pressure roller 22 can be positioned or positioned so that, together with a counter roller 23, it exerts a predefined pressing force on the film strip 18 when it is guided together with the covering 10 through a gap 24 between the pressure roller 22 and the counter roller 23.
- the pressing force on the film strip 18 is dimensioned such that the film strip 18 essentially completely penetrates the fabric of the covering 10, so that the threads of the covering 10 are completely enclosed by the film strip 18 in the region of the side edge. So that the penetration of the tissue with the film strip 18 is possible, both the tissue and the film strip 18 are heated beforehand so that they melt.
- a hot air source 26 is used, which is oriented in such a way that a jet of hot air, which is indicated in FIG. 1 by three parallel arrows, is directed into the gap 24.
- the amount of heat is preferably calculated such that the threads in the edge region of the woven covering 10 only melt or become soft on the surface, whereas the film strip 18 becomes soft over almost its entire thickness.
- the method can be continued continuously until the covering 10 is provided with the edge protection 12 along its entire circumference. Subsequently or at the same time, the edge of the covering opposite in the cross-machine direction can also be provided with an edge protection 12 in the same way.
- FIG. 2 illustrates a second exemplary embodiment of the inventive method.
- the same reference numerals refer to the same Components or component sections as in the embodiment in FIG. 1. In this respect, only the differences from the embodiment in FIG. 1 are discussed below and reference is otherwise made to the above description.
- the essential difference between the first embodiment and the second embodiment is that the pressure roller 22 does not form a gap 24 in interaction with the counter roller 23, through which a pressing force is exerted on the film strip 18, but instead such a gap becomes in the interaction of the Pressure roller 22 is formed with a plate 28.
- the plate 28 can be essentially flat, that is to say have a surface facing the pressure roller 22 which is essentially flat.
- the plate 28 preferably has an inlet slope (at its left end in FIG. 2).
- the industrial air source 26 is again to be positioned such that it directs a jet of hot air into the gap between the pressure roller 22 and the plate 28.
- FIG. 3 illustrates a third exemplary embodiment of the inventive method.
- the same reference numerals relate to the same components or component sections as in the embodiment in FIG. 2. In this respect, only the differences from the embodiment in FIG. 2 are discussed below and reference is made to the above description of the first two embodiments.
- the essential difference between the second embodiment and the third embodiment is that the pressure roller 22 of the second embodiment has been replaced by a further plate 30 which, in cooperation with the plate 30, forms a gap through which a pressing force is exerted on the film strip 18 .
- the two plates 28, 30 together preferably form a tapering gap through which the covering 10 is passed together with the film strip 18 so that the film strip 18 is pressed into the fabric of the covering 10 or preferably penetrates it completely.
- the hot air source 26 is positioned as in the second embodiment.
- Figure 4 shows a plan view of the covering 10 stretched over the two tensioning rollers 14, 16, which is provided on its two side edges with a respective edge protection 12.
- the two side edges are then preferably trimmed, for example by means of ultrasound technology, in order to obtain smooth edges and a covering with a precisely defined width.
- the threads of the fabric are thereby so well protected by the positive and material connection that it is almost impossible to detach individual threads from the edge protector 12. Individual thread ends, which may protrude from the edge protector 12, tend to break off.
Landscapes
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019100268.0A DE102019100268A1 (de) | 2019-01-08 | 2019-01-08 | Kantenschutz für eine Papiermaschinenbespannung |
| PCT/EP2019/084203 WO2020143967A1 (de) | 2019-01-08 | 2019-12-09 | Kantenschutz für eine papiermaschinenbespannung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3908694A1 true EP3908694A1 (de) | 2021-11-17 |
| EP3908694B1 EP3908694B1 (de) | 2022-10-26 |
Family
ID=68887017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19820703.7A Active EP3908694B1 (de) | 2019-01-08 | 2019-12-09 | Kantenschutz für eine papiermaschinenbespannung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11525213B2 (de) |
| EP (1) | EP3908694B1 (de) |
| CN (1) | CN113272493B (de) |
| DE (1) | DE102019100268A1 (de) |
| PT (1) | PT3908694T (de) |
| WO (1) | WO2020143967A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20260028775A1 (en) * | 2024-07-29 | 2026-01-29 | Huyck Licensco Inc. | Papermaking fabric with edge sewn with fusible thread |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4121572C1 (de) * | 1991-06-29 | 1992-12-03 | Fa. Ernst Siegling, 3000 Hannover, De | |
| US5731059A (en) * | 1993-04-07 | 1998-03-24 | Wangner Systems Corporation | Dryer fabric having an abrasion resistant edge |
| US6503602B1 (en) * | 2000-07-26 | 2003-01-07 | Astenjohnson, Inc. | Dryer fabric with reinforced edges |
| US7074729B2 (en) * | 2003-02-18 | 2006-07-11 | Siegling America, Llc | Fabric-reinforced belt for conveying food |
| US20100252217A1 (en) | 2007-03-26 | 2010-10-07 | Robert Eberhardt | Paper machine clothing with edge reinforcement |
| DE102007015055A1 (de) * | 2007-03-26 | 2008-10-02 | Voith Patent Gmbh | Papiermaschinenbespannung mit Randverstärkung |
| US8241464B2 (en) * | 2008-02-01 | 2012-08-14 | Albany International Corp. | Papermaking clothing defining a width of a paper web and associated system and method |
-
2019
- 2019-01-08 DE DE102019100268.0A patent/DE102019100268A1/de not_active Ceased
- 2019-12-09 CN CN201980087937.8A patent/CN113272493B/zh active Active
- 2019-12-09 US US17/420,552 patent/US11525213B2/en active Active
- 2019-12-09 WO PCT/EP2019/084203 patent/WO2020143967A1/de not_active Ceased
- 2019-12-09 PT PT198207037T patent/PT3908694T/pt unknown
- 2019-12-09 EP EP19820703.7A patent/EP3908694B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| PT3908694T (pt) | 2022-12-27 |
| US11525213B2 (en) | 2022-12-13 |
| WO2020143967A1 (de) | 2020-07-16 |
| EP3908694B1 (de) | 2022-10-26 |
| US20220120037A1 (en) | 2022-04-21 |
| CN113272493A (zh) | 2021-08-17 |
| DE102019100268A1 (de) | 2020-07-09 |
| CN113272493B (zh) | 2023-07-21 |
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