EP1582625A1 - Breitnip-Kalander und Verfahren zum Satinieren einer Materialbahn in einem Breitnip - Google Patents
Breitnip-Kalander und Verfahren zum Satinieren einer Materialbahn in einem Breitnip Download PDFInfo
- Publication number
- EP1582625A1 EP1582625A1 EP05100479A EP05100479A EP1582625A1 EP 1582625 A1 EP1582625 A1 EP 1582625A1 EP 05100479 A EP05100479 A EP 05100479A EP 05100479 A EP05100479 A EP 05100479A EP 1582625 A1 EP1582625 A1 EP 1582625A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- nip
- roll
- pressure chamber
- membrane
- 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
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000011282 treatment Methods 0.000 title description 8
- 239000012528 membrane Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 3
- 238000003490 calendering Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0206—Controlled deflection rolls
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/006—Calenders; Smoothing apparatus with extended nips
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0206—Controlled deflection rolls
- D21G1/0213—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member
- D21G1/022—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member the means using fluid pressure
Definitions
- the invention relates to a wide-nip calender with a Shoe roll, a counter roll and a between the Shoe roll and the counter roll trained Breitnip with a working length, wherein the shoe roll has a circumferential Jacket having, by a Anpreßschuhan ever is resilient in the direction of the counter roll. Furthermore, the invention relates to a method for satinizing a web in a wide nip, the between a jacket of a shoe roll and a counter roll is formed, taking the coat with the help of a Anpreßschuhan whatsoever loaded in the direction of the counter roll.
- a wide nip also referred to as an "extended" nip will have a "normal” nip between two rollers is formed, a larger working length. This causes a material web, which in the Satin nipples are treated over a longer period of time becomes.
- the compressive stresses in a nip are usually lower than in a normal nip. This leads to a lower compression, that is to one Volume-saving satin finish.
- the coat of the shoe roll is usually by a Pressed against the counter-roller pressed out of a rigid metal block is formed.
- This press shoe has a pressure surface, which is against the counter roll is adapted. If one considers the radius of the counter roll, the thickness of the web to be satinized and the thickness knows the coat, then you can see the contour of the Calculate the contact surface and then grind it in. she is more or less good within the tolerances adapted the counter roll.
- the invention is based on the object to simple Way different treatments of webs to be able to adjust.
- This task is at a wide-nip calender of the beginning mentioned type solved by the Anpreßschuhan instrument a changing the working length of the wide nip Length adjustment has.
- the Anpreßschuhan extract at least a pressure chamber, at least on its with the Coat cooperating side through a flexible membrane is limited.
- the membrane is in this case preferably not only flexible, but also within certain limits elastic. If you put the pressure chamber under pressure, then the membrane initially bulges in the direction of the counter roll out. If then the counter roll and the Shoe roll are moved together, then dips the counter roll with the liner in place more or less far into the membrane. The membrane then fits automatically to the contour of the counter roll, so that one Even without complicated grinding a pressure surface achieved in the desired treatment pressures can be achieved for the calendering.
- a pressure chamber can also be several pressure chambers provide that distributed in the axial and / or circumferential direction are.
- the length adjustment device has a Positioning device for the pressure chamber relative to Counter roll and a pressure adjustment for a Pressure in the pressure chamber.
- By changing the position of the Pressure chamber relative to the counter roll can thus be on simple way the working length of the wide nip to adjust.
- the volume of the pressure chamber changed it may be appropriate to also the pressure in to check the pressure chamber accordingly.
- About the Adjustment of the pressure in the pressure chamber can be additionally also the treatment pressure of the web in the Affect wide nip.
- the membrane has openings. Through the openings can continuously a liquid drain from the pressure chamber and the touch Lubricate between the jacket and the membrane. By the ongoing drainage of liquid, of course facing a corresponding inflow of liquid must, the pressure in the pressure chamber can be relatively set exactly. Additionally or alternatively one lubrication between the membrane and the jacket also realized by an external oil supply. In this Case you can leave the oil in the pressure room.
- a dimensionally stable inlet edge serves to deform the shell of Convex to concave specifically affect.
- This deformation course can be, if only the membrane used, not sufficient for all operating conditions Control security. By using a But this is not a problem.
- the leading edge is on a fitting formed and the membrane spans the fitting. This results in no gap in the pressurization between the fitting and the remainder the membrane. If you make sure that the counter roll always immersed in the membrane with a minimum depth, then it will definitely be ensured that the deformation of the jacket from convex to concave over the leading edge is controlled.
- the inlet edge is arranged stationary and a pressure chamber on the side facing away from the counter roller limiting frame is movable.
- the deformation of the roll shell can best be controlled.
- the pressure chamber is parallel to the axis of the mating roll variable in width.
- the width of the wide nip in the transverse machine direction, ie perpendicular to the direction of movement of the material web can also be changed. This is particularly advantageous when the mating roll is heated. As a rule, one would like to avoid that the jacket comes into contact with the heated roller. Since the jacket is often formed from a plastic, there is a risk that the jacket is thermally damaged in such contact areas.
- the pressure chamber has walls, which interact telescopically. By the Flexibility of the membrane remains the surface of the Anpreßschuhanowski extract homogeneous.
- the pressure chamber has walls made of elastic expandable material are formed.
- the elasticity is Of course not unlimited. With appropriate design However, the width of the pressure chamber but can be even within larger limits.
- the object is in the method of the aforementioned Art solved by putting the coat on a Pressure pad supported and the working length of the wide nip adjusting the position of the pressure pad relative changed to the counter roll.
- the counter roll emerges when the pressure pad is closer is arranged on the counter-roller, further into the membrane and thus in the coat of the shoe roll, so that the Working length of the wide nip is changed. If that's it Pressure pad further away from the counter roll, is the Effect reversed. Then the counter roll will appear less far in the coat, so that the working length is reduced.
- the pressure of the pressure pad tuned to the position of the pressure pad. Thereby the working length can be adjusted more precisely to specifications to adjust.
- the pressure pad is limited by a Membrane, generates the pressure through a liquid and lets the liquid pass through the membrane.
- a Liquid can usually be a relatively high Create pressure. If you put the liquid through the membrane can pass through, then the liquid can Lubrication of a contact surface between the jacket and the membrane can be used. By the steady Outflow of liquid can be the pressure in the Control pressure chamber relatively accurately.
- This is a relatively simple measure to the working width of the wide nip in the cross machine direction to the width to adjust the web to be satinized.
- the jacket is allowed to have a dimensionally stable Enter the inlet edge into the wide nip.
- the leading edge So it is not by a deformation of the membrane changed. This allows the deformation of the shell from convex to concave relatively well control and strain of the jacket by the mechanical transformations are kept small.
- Fig. 1 shows a section of a wide-nip calender 1, which is a shoe roll 2 with a circumferential jacket 3 and a counter-roller 4 has.
- a coat 3 abuts against the counter roll 4, then creates a nip 5.
- the jacket 3 should not be directly rest against the counter roll 4, but with an intermediate layer a material web to be satinized, for example a web of paper or paperboard placed in the drawing is not shown.
- Anpreßschuhan ever 6 is provided which is a pressure shoe 7, which passes through the jacket 3 on one Carrier 8 is arranged.
- the carrier 8 is stationary.
- the lifting device 9 can For example, designed as a piston-cylinder device be.
- a position sensor 11 detects the position of the pressure shoe 7 with respect to the carrier 8.
- the position the counter roller 4 to the carrier 8 can be in other ways determine. For example, by outside the shoe roll 2 arranged sensors can be the position of Pressing shoe 7 relative to the counter roll 4 by means of Determine position sensor 11.
- the position sensor 11 Of course it can also be arranged in another place be.
- the pressure shoe 7 has a pressure chamber 13, the on the counter roller 4 facing side of an elastic and flexible membrane 14 is limited.
- the Membrane 14 also forms part of sidewalls 15.
- the pressure shoe 7 has a frame 16 which is formed as a continuous plate and a connection 17 for supplying a pressurized fluid. To the Frame 16 is followed by side walls 18, on which the membrane 14 is attached.
- a pressure sensor 19 is arranged, the is also connected to the control device 10.
- a predetermined Working length of the wide nip 5 is set, then the pressure shoe 7 in the direction of the counter roll 4 raised (the direction refers to on the presentation of the drawing). It dives the Counter roll 4 (with the interposition of the web and of the jacket 3) into the membrane 14, as shown in FIG Fig. 3b is shown. At a lifting height h1 results a working length of 11. If the lifting height is increased to h2, results in a working length 12, the larger is the working length 11 of the wide nip 5.
- control device 10 becomes dependent on a predetermined compressive stress in the broad nip 5 the pressure in the pressure chamber 13 and the lifting height h1, h2 choose so that the desired working length 11, 12 comes about.
- the membrane 14th a certain number of openings through which continuously pressure fluid from the pressure chamber 13 exits. This pressure fluid is constantly refilled, so that the pressure in the pressure chamber 13 on the set Value can be kept constant.
- the exiting Liquid lubricates the interface between the Sheath 3 and the membrane 14.
- the width of the pressure chamber 13 in the transverse machine direction can be changed.
- the frame 16 and the side walls 18 are formed telescoping.
- the membrane 14 may have some elasticity, which should preferably be elastic so that the membrane 14 can be lengthened or shortened in cross-machine direction by engaging corresponding tensile or compressive forces.
- Fig. 2 shows a modified embodiment of a pressure shoe 7, wherein the same parts are provided with the same reference numerals as in Fig. 1.
- Added is a fitting 20 which is arranged on the inlet side of the broad nip 5. This molding 20 defines an inlet edge 21 over which the jacket 3 must enter.
- the leading edge 21 thus defines a path for the deformation that the jacket 3 must perform from convex to concave. Via a corresponding inlet edge 21, the mechanical stress of the shell can be kept relatively small. Movable is only the frame 16. The fitting 20 is held stationary relative to the carrier 8.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Paper (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Vorzugsweise ist die Druckkammer parallel zur Achse der Gegenwalze in ihrer Breite veränderbar. Damit läßt sich auch die Breite des Breitnips in Quermaschinenrichtung, also senkrecht zur Bewegungsrichtung der Materialbahn, verändern. Dies ist insbesondere dann von Vorteil, wenn die Gegenwalze beheizt ist. Man möchte in der Regel vermeiden, daß der Mantel mit der beheizten Walze in Berührung kommt. Da der Mantel vielfach aus einem Kunststoff gebildet ist, besteht die Gefahr, daß der Mantel in solchen Berührungsbereichen thermisch geschädigt wird. Man muß daher den Anpreßschuh möglichst genau an die Breite der Materialbahn anpassen. Solange die Materialbahn zwischen dem Mantel und der Gegenwalze angeordnet ist, wirkt sie als thermischer Isolator. Durch die Veränderung der Breite der Druckkammer läßt sich nun auf einfache Weise die Arbeitsbreite des Breitnips einstellen. Außerhalb der Breite der Druckkammer wird der Mantel nicht mehr unterstützt, so daß er von der Gegenwalze abheben kann.
- Fig. 1
- einen Ausschnitt aus einer ersten Ausführungsform eines Breitnip-Kalanders,
- Fig. 2
- einen Anpreßschuh einer anderen Ausführungsform eines Breitnip-Kalanders und
- Fig. 3
- eine schematische Darstellung zur Erläuterung der Einstellung unterschiedlicher Arbeitslängen des Breitnips.
Fig. 2 zeigt eine abgewandelte Ausführungsform eines Anpreßschuhs 7, bei dem gleiche Teile mit den gleichen Bezugszeichen wie in Fig. 1 versehen sind. Hinzugekommen ist ein Formstück 20, das auf der Einlaufseite des Breitnips 5 angeordnet ist. Dieses Formstück 20 definiert eine Einlaufkante 21, über die der Mantel 3 einlaufen muß. Die Einlaufkante 21 legt damit einen Pfad für die Verformung fest, die der Mantel 3 von konvex zu konkav durchführen muß. Über eine entsprechende Einlaufkante 21 läßt sich die mechanische Beanspruchung des Mantels relativ klein halten. Beweglich ist nur der Rahmen 16. Das Formstück 20 wird relativ zum Träger 8 ortsfest gehalten.
Claims (15)
- Breitnip-Kalander mit einer Schuhwalze, einer Gegenwalze und einem zwischen der Schuhwalze und der Gegenwalze ausgebildeten Breitnip mit einer Arbeitslänge, wobei die Schuhwalze einen umlaufenden Mantel aufweist, der durch eine Anpreßschuhanordnung in Richtung auf die Gegenwalze belastbar ist, dadurch gekennzeichnet, daß die Anpreßschuhanordnung (6) eine die Arbeitslänge des Breitnips (5) verändernde Längeneinstelleinrichtung aufweist.
- Kalander nach Anspruch 1, dadurch gekennzeichnet, daß die Anpreßschuhanordnung (6) mindestens eine Druckkammer (13) aufweist, die zumindest auf ihrer mit dem Mantel (3) zusammenwirkenden Seite durch eine flexible Membran (14) begrenzt ist.
- Kalander nach Anspruch 2, dadurch gekennzeichnet, daß die Längeneinstelleinrichtung eine Positioniereinrichtung (9-11) für die Druckkammer (13) relativ zur Gegenwalze (4) und eine Druckeinstelleinrichtung für einen Druck in der Druckkammer (13) aufweist.
- Kalander nach Anspruch 2 und 3, dadurch gekennzeichnet, daß die Membran (14) Durchbrechungen aufweist.
- Kalander nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß in einem Einlaufbereich des Breitnips (5) eine formstabile Einlaufkante (21) ausgebildet ist.
- Kalander nach Anspruch 5, dadurch gekennzeichnet, daß die Einlaufkante (21) an einem Formstück (20) ausgebildet ist und die Membran (14) das Formstück (20) überspannt.
- Kalander nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Einlaufkante (21) ortsfest angeordnet ist und ein den Druckraum auf der der Gegenwalze abgewandten Seite begrenzender Rahmen (16) beweglich ist.
- Kalander nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Druckkammer (13) parallel zur Achse der Gegenwalze (4) in ihrer Breite veränderbar ist.
- Kalander nach Anspruch 8, dadurch gekennzeichnet, daß die Druckkammer (13) Wände (15) aufweist, die teleskopierend zusammenwirken.
- Kalander nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Druckkammer (13) Wände (15) aufweist, die aus elastisch dehnbarem Material gebildet sind.
- Verfahren zum Satinieren einer Materialbahn in einem Breitnip, der zwischen einem Mantel einer Schuhwalze und einer Gegenwalze gebildet ist, wobei man den Mantel mit Hilfe einer Anpreßschuhanordnung in Richtung auf die Gegenwalze belastet, dadurch gekennzeichnet, daß man den Mantel auf einem Druckkissen abstützt und die Arbeitslänge des Breitnips einstellt, indem man die Position des Druckkissens relativ zur Gegenwalze verändert.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß man den Druck des Druckkissens auf die Position des Druckkissens abstimmt.
- Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß man das Druckkissen durch eine Membran begrenzt, den Druck durch eine Flüssigkeit erzeugt und die Flüssigkeit durch die Membran hindurchtreten läßt.
- Verfahren nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, daß man die Arbeitsbreite des Breitnips durch Verändern der Breite des Druckkissens einstellt.
- Verfahren nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, daß man den Mantel über eine formstabile Einlaufkante in den Breitnip einlaufen läßt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004015997 | 2004-04-01 | ||
| DE200410015997 DE102004015997A1 (de) | 2004-04-01 | 2004-04-01 | Breitnip-Kalander und Verfahren zum Satinieren einer Materialbahn in einem Breitnip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1582625A1 true EP1582625A1 (de) | 2005-10-05 |
| EP1582625B1 EP1582625B1 (de) | 2008-11-26 |
Family
ID=34877682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20050100479 Expired - Lifetime EP1582625B1 (de) | 2004-04-01 | 2005-01-26 | Breitnip-Kalander und Verfahren zum Satinieren einer Materialbahn in einem Breitnip |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1582625B1 (de) |
| DE (2) | DE102004015997A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713147A (en) * | 1982-05-05 | 1987-12-15 | Oy Tampella Ab | Extended nip press with displaceable center of gravity for the supporting force |
| US5676799A (en) * | 1994-03-18 | 1997-10-14 | Voith Sulzer Papiermaschinen Gmbh | Extended nip press shoe with adjustable stop |
| US5753084A (en) * | 1994-07-06 | 1998-05-19 | Voith Sulzer Papiermaschinen Gmbh | Elongated gap press with adjustable length |
| US6334933B1 (en) * | 1999-04-14 | 2002-01-01 | Metso Chemical Pulping Oy | Press |
-
2004
- 2004-04-01 DE DE200410015997 patent/DE102004015997A1/de not_active Withdrawn
-
2005
- 2005-01-26 DE DE200550006036 patent/DE502005006036D1/de not_active Expired - Lifetime
- 2005-01-26 EP EP20050100479 patent/EP1582625B1/de not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713147A (en) * | 1982-05-05 | 1987-12-15 | Oy Tampella Ab | Extended nip press with displaceable center of gravity for the supporting force |
| US4713147B1 (en) * | 1982-05-05 | 1996-12-31 | Valmet Paper Machinery Inc | Extended nip press with displaceable centre of gravity for the supporting force |
| US4713147B2 (en) * | 1982-05-05 | 1997-11-04 | Valmet Paper Machinery Inc | Extended nip press with displaceable center of gravity for the supporting force |
| US5676799A (en) * | 1994-03-18 | 1997-10-14 | Voith Sulzer Papiermaschinen Gmbh | Extended nip press shoe with adjustable stop |
| US5753084A (en) * | 1994-07-06 | 1998-05-19 | Voith Sulzer Papiermaschinen Gmbh | Elongated gap press with adjustable length |
| US6334933B1 (en) * | 1999-04-14 | 2002-01-01 | Metso Chemical Pulping Oy | Press |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004015997A1 (de) | 2005-10-20 |
| EP1582625B1 (de) | 2008-11-26 |
| DE502005006036D1 (de) | 2009-01-08 |
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