EP0837184B1 - Trockenpartie - Google Patents
Trockenpartie Download PDFInfo
- Publication number
- EP0837184B1 EP0837184B1 EP97111681A EP97111681A EP0837184B1 EP 0837184 B1 EP0837184 B1 EP 0837184B1 EP 97111681 A EP97111681 A EP 97111681A EP 97111681 A EP97111681 A EP 97111681A EP 0837184 B1 EP0837184 B1 EP 0837184B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drying section
- drying
- section according
- web
- web guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001035 drying Methods 0.000 claims description 80
- 239000000463 material Substances 0.000 claims description 43
- 239000004033 plastic Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 description 13
- 239000004744 fabric Substances 0.000 description 8
- 239000000123 paper Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/021—Construction of the cylinders
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/04—Drying on cylinders on two or more drying cylinders
Definitions
- the invention relates to a dryer section of a machine for production a material web, in particular paper or cardboard web, according to the Preamble of claim 1.
- Dryer sections of the type mentioned here are known.
- the web of material is used together with a conveyor belt over a number of Drying cylinders led.
- a tensile stress required on the web that stretches it and the paper quality negatively influenced.
- EP-A-0 227 442 describes a dryer section in which the Material web on the outside of the dryer fabric in question a respective lower cylinder is guided, either with an envelope provided or around which an additional inner band is guided.
- the sleeve or the band consist of a fabric and a have a ribbed outer surface. Direct contact of the material web with the respective lower cylinder is already here through that Preventing dryer fabric.
- envelope or belt is used between the Conveyor belt and the cylinder to create additional clearance through which an overpressure and thus a lifting of the outside on the Conveyor belt or dryer fabric lying material web is prevented.
- a paper drying machine is described in US-A-1 702 907, in which the paper web together with a carrier tape around a drying cylinder which directly touches the cylinder, i.e. between this and the paper web.
- the carrier tape can in particular be porous.
- US-A-4 639 291 is concerned with equalizing the temperature cross profile a drying cylinder in certain limited axial Areas such as especially in the roller end areas where there is too overheating.
- a respective fabric tape is now applied to the cylinder, in order to create free space in the relevant areas, which as a result the air accumulating there for appropriate thermal insulation and thus counteract the local temperature increase.
- the fabric tapes in question are therefore only limited in axial Areas, i.e. in particular in the area of the two cylinder ends.
- the invention has for its object an improved dryer section to create the type mentioned, in which the above Disadvantages are eliminated.
- This dryer section stands out characterized in that a respective drying cylinder and / or a respective Web guide roller around which the material web or web by means of the respective Conveyor belt is guided so that this conveyor belt is not between the material web and the drying cylinder or the web guide roller, in each case on the respective cylinder or roller circumferential surface Threads or from one on the respective cylinder or roller circumferential surface adjacent sieve is surrounded by which a direct Contact of the material web with the respective cylinder or roller circumferential surface is prevented.
- the threads or the sieve facilitate the web acceptance of the drying cylinder or the web guide roller, so that the Tensile stresses on the material web can be significantly reduced and practically eliminate the disadvantages mentioned.
- An embodiment of the dryer section which is characterized by this, is preferred distinguishes that that assigned to the drying cylinder or the web guide roller Sieve forms a closed loop within which the Drying cylinder or the web guide roller is arranged. On such a structure is relatively easy to implement. It is also possible retrofit existing dryer sections with such a loop.
- An embodiment of the dryer section is particularly preferred is characterized in that the threads made of plastic or metal or from with - at least on the surfaces facing the material web - Plastic-provided metal threads exist. It is possible in this way to increase the heat conduction from the drying cylinder to the material web and / or to improve the web guidance.
- the drying section described below is generally usable for the production of a material web. It is particularly suitable for paper and Carton making machines, so that here is purely exemplary assumed a paper making machine shall be.
- FIG. 1 shows in a highly schematic representation a roller of a dryer section in side view, which is a drying cylinder or a Web guide roller can act.
- a drying cylinder 1 acts on the peripheral surface of a dashed indicated sieve 3 is applied.
- the Sieve spans the entire length of the drying cylinder. It is on the end faces 5 and 7 of the drying cylinder 1 appropriately held. Here are fastening on both sides respectively Tension bars 9 and 11 indicated. It is of course possible, the screen 3 in the area to attach the peripheral surface 13.
- the sieve 3 spans the entire circumferential surface 13 of the drying cylinder 1, so that when installing the Drying cylinder 1 in a dryer section the paper or web of material, not shown here is not directly touching the peripheral surface 13.
- the sieve 3 lies directly on the whole Circumferential surface of the drying cylinder 1.
- Figure 2 shows a section of a dryer section 10, which is an example here as a two-tier dryer section is trained.
- Figure 2 is the last one Drying cylinder 1a of a first dryer group 15 and the first drying cylinder 1b a second Drying group 17 shown.
- the material web 19 is transferred from the drying cylinder 1a to the drying cylinder 1b transferred.
- the two drying cylinders is a hot air hood 21 and 23 assigned, with the help of the drying cylinder 1a and 1b material web 19 guided around charged with hot air or hot steam can be.
- a dashed line indicates in FIG. 2 that that both drying cylinders 1a and 1b with one Sieve 3 are spanned, as it is based on Figure 1 was explained.
- the sieve 3 directly to the Drying cylinders 1a and 1b abut and their peripheral surface 13 completely surrounds, that is in one Area touched by an arc of 360 ° equivalent.
- FIG 3 finally shows a section of a Dryer section 100, the first web guide roller 25a as well as a direction of transport of the material web 19 seen - following web guide roller 25b.
- the dryer section 100 comprises two of the web guide rolls subordinate and immediately successive Drying cylinder 1 'and 1' '.
- the web of material 19 first becomes meandering around the two Web guide rolls 25a and 25b and then over the drying cylinders 1 'and 1' 'led.
- the web guide rollers 25a and 25b are each a screen 3a and 3b associated that the peripheral surface 13a of the Web guide roller 25a over the length of the web guide roller but not over an arc area of Touched 360 °.
- the contact area corresponds here a circular arc of approx. 260 °.
- the sieve 3a forms a closed loop within which the Web guide roller 25a is arranged.
- a deflection roller 27a is provided, which are also within the closed loop is arranged.
- the deflection roller 27a is here in one Distance arranged below the web guide roller 25a. It is possible to set the distance form and thus the deflection roller as a tensioning device to use for the sieve 3a. Is possible it also, the deflection roller 27a with its own drive to be provided, where appropriate on a drive of the web guide roller 25a can be dispensed with can.
- the web guide roller 25b is also of the associated Sieve 3b not in the area of the entire circumferential surface 13b touched.
- the wrap angle is in which the screen 3b the peripheral surface 13b touches the web guide roller 25b, about 260 °.
- the screen 3b in turn forms a closed one Loop in which the web guide roller 25b and a the deflection roller 27b corresponding to the deflection roller 27a are arranged, their distance from the web guide roller in turn can be adjustable.
- the drying cylinder 1 ' is here Screen 3c associated with a closed loop trains within which except the drying cylinder 1 'a deflection roller 27c is arranged.
- the embodiment shown here is the Surround drying cylinder 1 '' with a sieve 3d the peripheral surface 13d of the drying cylinder 1 '' completely touched, that is, over a wrap angle of 360 °.
- Sieves 3a, 3b, 3c and 3d ensure that the material web 19 the surfaces 13a, 13b, 13c and 13d of the web guide rolls 25a and 25b and the drying cylinder 1 'and 1' 'not immediately touched so that the adhesive forces between the material web and the peripheral surfaces are reduced are so that the tension within the Material web can be reduced.
- the web guide rollers 25a and 25b are in the contact area between material web 19 and the associated Circumferential surfaces 13a and 13b, here for example sucked from the inside.
- the suction areas 29a and 29b are only hinted at here as such Suction is generally known.
- the web guide rolls 25a and 25b can also be suitably used be sucked from the outside. After all, it is too possible that the suction of the web guide rolls through Self-ventilation with the help of scrapers, which are known and are therefore not shown here.
- the dryer section 100 is designed here such that the web guide rollers 25a and 25b hot air hoods 21a and 21b are assigned.
- Threads made of plastic or metal consist are from Threads made of plastic or metal consist. It is also conceivable to use metal threads the at least on their the material web facing surface with plastic or are coated.
- plastic preferably polyamide or polyester used.
- the threads have a rectangular, trapezoidal shape or oval cross-section. It is also possible, to form the threads flat, that is to say in the form of a ribbon.
- the air permeability of the screens is preferred very large. Coarse-mesh sieves are therefore preferred which have a mesh size of approx. 1 cm.
- the sieves can be cleaned by blowing air take place that also in the web guide rollers respectively is introduced into the suction elements, so that at times an overpressure acts on the sieves.
- Another essential aspect is that two adjacent loops, like them in particular were explained with reference to Figure 3, in immediate Are arranged close to each other, preferably run in contact with each other. You can do this the web guide rollers, deflection rollers and / or drying cylinders adjacent loops in direct contact with each other or at a very short distance be arranged to each other. Is preferred a distance of less than 2 cm, preferably of chosen less than 1 cm. Has proven particularly successful a distance of less than 0.5 cm.
Landscapes
- Drying Of Solid Materials (AREA)
- Paper (AREA)
Description
- Figur 1
- eine Prinzipskizze einer Seitenansicht einer Walze;
- Figur 2
- eine Prinzipskizze eines Ausschnitts eines ersten Ausführungsbeispiels einer Trockenpartie und
- Figur 3
- eine Prinzipskizze eines Ausschnitts eines zweiten Ausführungsbeispiels einer Trockenpartie.
Claims (17)
- Trockenpartie einer Maschine zur Herstellung einer Materialbahn (19), insbesondere Papier- oder Kartonbahn, mit wenigstens einem Trockenzylinder (1, 1a, 1b, 1', 1") und einer Anzahl von Bahnleitwalzen (25a, 25b), um die die Materialbahn (19) mittels wenigstens eines Transportbandes mäanderförmig geführt ist,
dadurch gekennzeichnet, dass ein jeweiliger Trockenzylinder (1, 1a, 1b, 1', 1") und/oder eine jeweilige Bahnleitwalze (25a, 25b), um den beziehungsweise die die Materialbahn (19) mittels des jeweiligen Transportbandes so geführt ist, dass dieses Transportband nicht zwischen der Materialbahn (19) und dem Trockenzylinder beziehungsweise der Bahnleitwalze liegt, jeweils von an der jeweiligen Zylinder- beziehungsweise Walzenumfangsfläche (13, 13a-13d) anliegenden Fäden oder von einem an der jeweiligen Zylinder- beziehungsweise Walzenumfangsfläche (13, 13a-13d) anliegenden Sieb (3, 3a-3d) umgeben ist, durch die beziehungsweise das ein direkter Kontakt der Materialbahn (19) mit der jeweiligen Zylinder- beziehungsweise Walzenumfangsfläche (13, 13a-13d) verhindert wird. - Trockenpartie nach Anspruch 1,
dadurch gekennzeichnet, dass die Fäden oder das den Trockenzylinder (1'; 1") oder den Bahnleitwalzen (25a; 25b) zugeordnete Sieb (3a; 3b; 3c; 3d) eine geschlossene Schleife ausbilden, innerhalb derer der Trockenzylinder (1') beziehungsweise die Bahnleitwalzen (25a; 25b) angeordnet ist/ sind. - Trockenpartie nach Anspruch 2,
dadurch gekennzeichnet, dass zwei benachbarte Schleifen in unmittelbarer Nähe zueinander angeordnet sind. - Trockenpartie nach Anspruch 3,
dadurch gekennzeichnet, dass die beiden Schleifen in Berührung miteinander laufen. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass innerhalb der geschlossenen Schleife mindestens eine zusätzliche Umlenkwalze (27a; 27b; 27c) angeordnet ist. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Trockenzylinder und/oder die Bahnleitwalzen zur Ausbildung einer geschlossenen Schleife mit einem Sieb bezogen sind. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Sieb eine Maschenweite von ca. 10 mm aufweist. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Fäden aus Kunststoff oder Metall oder aus mit - zumindest auf der der Materialbahn (19) zugewandten Oberfläche - Kunststoff versehenen Metallfäden bestehen. - Trockenpartie nach Anspruch 8,
dadurch gekennzeichnet, dass als Kunststoff Polyamid oder Polyester verwendet wird. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Querschnitt der Fäden rechteckig, trapezförmig oder oval ist. - Trockenpartie nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass die Fäden als flache Bänder ausgebildet sind. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Sieb aus Fäden mit verschiedenen Querschnittsformen gebildet wird. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Bahnleitwalzen (25a; 25b) besaugt sind. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass den Bahnleitwalzen und/oder den Trockenzylindern Heißlufthauben zugeordnet sind. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Bahnleitwalzen zur Reinigung der zugehörigen Siebe mit Blasluft beaufschlagbar sind. - Trockenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass ein nachfolgender Teil der Trockenpartie als konventionelle Trockenpartie ausgebildet ist. - Trockenpartie nach einem der Ansprüche 2 bis 16,
dadurch gekennzeichnet, dass sich zwei Bahnleitwalzen, Umlenkwalzen und/oder Trockenzylinder benachbarter Schleifen berühren oder in einem geringen Abstand von weniger als 2 cm, vorzugsweise von weniger als 1 cm, vorzugsweise von weniger als 0,5 cm angeordnet sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19642526 | 1996-10-15 | ||
| DE19642526A DE19642526A1 (de) | 1996-10-15 | 1996-10-15 | Trockenpartie |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0837184A2 EP0837184A2 (de) | 1998-04-22 |
| EP0837184A3 EP0837184A3 (de) | 1999-06-02 |
| EP0837184B1 true EP0837184B1 (de) | 2004-05-06 |
Family
ID=7808822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97111681A Expired - Lifetime EP0837184B1 (de) | 1996-10-15 | 1997-07-10 | Trockenpartie |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6088926A (de) |
| EP (1) | EP0837184B1 (de) |
| DE (2) | DE19642526A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19841768A1 (de) * | 1998-09-11 | 2000-03-16 | Voith Sulzer Papiertech Patent | Trockenpartie |
| DE19934868A1 (de) * | 1999-07-24 | 2001-01-25 | Voith Paper Patent Gmbh | Beheizter Trockenzylinder |
| DE19959669A1 (de) * | 1999-12-10 | 2001-06-13 | Voith Paper Patent Gmbh | Trockenpartie |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1702907A (en) * | 1927-08-09 | 1929-02-19 | Otaka Fabric Company | Paper-drying machine |
| US2152263A (en) * | 1930-04-28 | 1939-03-28 | Theodore E Knowlton | Method and apparatus for preventing offset in printing |
| US3354035A (en) * | 1966-11-08 | 1967-11-21 | Albemarle Paper Co | Continuous process of drying uncoated fibrous webs |
| FI59278C (fi) * | 1980-05-13 | 1981-07-10 | Valmet Oy | Cylindertork i en pappersmaskin eller liknande |
| JPS59199896A (ja) * | 1983-04-20 | 1984-11-13 | 敷島カンバス株式会社 | 抄紙乾燥工程に於ける紙シ−ト含有水分の調整方法及び装置 |
| FI69141C (fi) * | 1984-10-09 | 1985-12-10 | Tampella Oy Ab | Foerfarande och anordning foer torkning av en pappersbana eller liknande |
| GB8531540D0 (en) * | 1985-12-21 | 1986-02-05 | Scapa Porritt Ltd | Papermachine &c fabrics |
| FI96790C (fi) * | 1994-10-11 | 1996-08-26 | Tampella Oy Valmet | Laite kuiturainan kuivaamiseksi ja sileyttämiseksi |
-
1996
- 1996-10-15 DE DE19642526A patent/DE19642526A1/de not_active Withdrawn
-
1997
- 1997-07-10 DE DE59711593T patent/DE59711593D1/de not_active Expired - Fee Related
- 1997-07-10 EP EP97111681A patent/EP0837184B1/de not_active Expired - Lifetime
- 1997-10-07 US US08/946,645 patent/US6088926A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US6088926A (en) | 2000-07-18 |
| EP0837184A2 (de) | 1998-04-22 |
| DE59711593D1 (de) | 2004-06-09 |
| EP0837184A3 (de) | 1999-06-02 |
| DE19642526A1 (de) | 1998-04-16 |
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