EP1063351A2 - Elastische Walze und Verfahren zum Herstellen einer solchen - Google Patents
Elastische Walze und Verfahren zum Herstellen einer solchen Download PDFInfo
- Publication number
- EP1063351A2 EP1063351A2 EP00107312A EP00107312A EP1063351A2 EP 1063351 A2 EP1063351 A2 EP 1063351A2 EP 00107312 A EP00107312 A EP 00107312A EP 00107312 A EP00107312 A EP 00107312A EP 1063351 A2 EP1063351 A2 EP 1063351A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- elastic
- core
- layer
- reference layer
- roller
- 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
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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
- D21G1/0233—Soft rolls
Definitions
- the present invention relates to a roller, in particular for smoothing of paper webs, with a hard one consisting in particular of metal Roll core with an elastic matrix material on the outside comprehensive elastic reference layer is provided.
- the invention relates to a method for producing such a roller directed.
- Elastic rolls of this type are used, for example, when satinizing paper webs.
- An elastic roller forms a press nip together with a hard roller through which the paper web to be processed is passed. While the hard roller has a very smooth surface, for example made of steel or cast iron, and is responsible for smoothing the side of the paper web facing it, the elastic roller acting on the opposite side of the paper web causes the paper web to be evened out and compressed in the press nip.
- the size of the rollers is 3 to 12 m in length and 450 to 1500 mm in diameter. They withstand line forces up to 600 N / mm and compressive stresses up to 130 N / mm 2 .
- Plastic coverings maximum temperature differences of about 20 ° C over the The width of the roller is permissible and on the other hand they are for the coating
- plastics used are much higher Thermal expansion coefficients than those commonly used Steel rollers or chill cast rollers, so that by increasing the temperature high axial tensions between the steel roller or chilled iron roller and the associated plastic coating occur.
- the part of the task relating to the roller is based on the invention solved by a roller of the type mentioned in that the elastic cover layer rotatable but longitudinally displaceable on the roller core is arranged.
- a corresponding method according to the invention is characterized in that the elastic reference layer is longitudinally displaceable but is rotatably applied to the roll core.
- the elastic reference layer according to the invention is longitudinally displaceable is arranged on the roll core, it is achieved that also at heating of the elastic roller, for example in operation, none Longitudinal stresses between the roll core and the elastic reference layer occur.
- the elastic stretches Reference layer in the longitudinal direction due to the higher coefficient of thermal expansion more out than the roll core, what due the longitudinal displaceability of the reference layer only leads to the fact that a relative movement between the elastic reference layer and the Roll core takes place in the axial direction.
- Either the both ends of the elastic reference layer in opposite directions move axially relative to the roll core or there may be a asymmetrical longitudinal displacement of the elastic reference layer the roller core.
- the relative shift between the reference layer and the roll core for example about 5 to 50 mm, usually 10 to 20 mm.
- a roller designed according to the invention is thus between the elastic reference layer and the roller core a tension-free connection before, which leads to a reduction of hot spots and at the one In principle, the reference layer is not detached from the roller core is possible.
- the elastic Reference layer free of play, especially arranged in a press fit on the roll core. It is preferred between the elastic reference layer and a separation layer for the roller core in particular to reduce friction provided between the elastic reference layer and the roll core.
- This separating layer can advantageously consist of silicone and / or from an essentially monomolecular layer and / or consist of a corrosion-inhibiting or -preventing material.
- the elastic reference layer which is arranged without play, in particular in a press fit it is guaranteed that in smoothing mode even with a relative high mechanical stress on the reference layer over its entire Extends form-fittingly on the surface of the roller core. A compression or, for example, wrinkling in the reference layer, which lead to a reduction in the quality of the material web being treated would be prevented.
- Through the separation layer becomes one the friction between the elastic reference layer and the roll core reduced so that when the roller is heated the desired Longitudinal displacement between the reference layer and the roll core take place can. The thinner the separating layer, the firmer is the seat of the reference layer on the roll core.
- the separation layer is advantageously made of a corrosion-inhibiting or contraceptive material.
- the anti-rotation and simultaneous displaceability of the elastic cover layer on the roll core is advantageous by on the surface of the roll core provided anti-rotation and guide elements and by interacting with them on the elastic reference layer provided counter elements reached.
- Longitudinal guides can be provided in the surface of the roll core engage provided, in particular bolt-shaped engagement elements.
- the longitudinal guides on the roller core and the engaging elements are provided on the elastic reference layer his.
- the matrix material of the elastic reference layer one or more fiber layers embedded.
- the physical properties of the elastic Reference layer can be specified. For example, by embedding of fibers with a stiffness that is higher than the stiffness of the Matrix material, the overall stiffness of the elastic reference layer increases become. Furthermore, the thermal conductivity of the elastic reference layer when choosing fibers with a high thermal conductivity a reference layer made of pure matrix material significantly improved become. This is particularly true with regard to the removal of excess Heat beneficial.
- the fiber layers are preferably at least partially inclined to Surface of the roll core extending fiber bundle formed, being in particular include crossing fiber bundles. By crossing each other A bundle of fibers is created through which one Torsion of the elastic reference layer is largely avoided. Since the elastic reference layer in a roller designed according to the invention is not firmly attached to the surface of the roll core, is fundamental a torsion of the freely displaceable reference layer is conceivable. Therefore the elastic reference layer is constructed according to the invention so that counteracting torsion of the reference layer.
- the elastic reference layer can be a radially outer functional layer and a radially inner connection layer for connection include the functional layer with the roll core. By dividing up in two sub-layers, these can each optimally match their respective Tasks to be adjusted.
- the radially outer one Functional layer have a higher elasticity than the radially inner layer Link layer, while this in turn, for example has a higher rigidity to the rotation lock with the roller core to be able to reliably meet.
- the fiber content of the reference layer can advantageously be radially from the inside out vary outside, in particular decrease, preferably in the radially outer Area of the reference layer of fiber content essentially is zero.
- the reference layer has a coefficient of thermal expansion has, which also in accordance with the fiber content radial direction is different from the inside to the outside. Because usually the matrix material has a significantly higher coefficient of thermal expansion has as the fiber material used, is therefore the respective resulting coefficient of thermal expansion of the interspersed with fibers Matrix material both from the coefficient of thermal expansion of the Matrix material as well as that of the fibers. The more fibers in embedded in the matrix material, the more the resulting one looks the same Coefficient of thermal expansion is the coefficient of thermal expansion of the fibers used.
- the fiber content is high, the stiffness of the cover layer is also clear increased, must in the radially outer areas of the reference layer the fiber content should be chosen lower, otherwise the surface the roller is too hard and would not be suitable for calendering.
- a especially essentially continuously decreasing radially outward Fiber content within the reference layer is achieved in that when the roller is heated, those occurring within the reference layer Longitudinal stresses due to the different thermal expansions of the different areas of the reference layer never become so large that a detachment or destruction of the reference layer arises.
- the elastic roller is used to produce an elastic roller Cover layer is longitudinally displaceable but non-rotatable on the roller core upset.
- the elastic reference layer on the Roll core are shrunk so that a shrink fit of the elastic reference layer on the roller core is reached.
- any method is possible with which the elastic Reference layer rotatably but longitudinally displaceable, in particular free of play can be applied to the roll core.
- the separating layer is designed, for example, so that it forms a firm connection, for example an adhesive bond between the matrix material and prevents the roll core
- the reference layer has a large number of fibers, in particular in several fiber layers one above the other, can be wound up on the roller core. More like that It is possible to fashion the fibers in a particularly cylindrical manner Winding the winding body out after the end of the winding process the wound reference layer is pulled out.
- the fibers can each be in the form of one or more fiber bundles and / or fiber rovings and / or nonwoven fabrics are wound. It is it is advantageous for the fibers to be wound up with the matrix material be surrounded, especially by a matrix bath. In principle, however, it is also possible that the fibers essentially be wound up dry and during or after winding up with applied to the matrix material, in particular completely into the matrix material be embedded.
- the roller according to the invention shown in Fig. 1 comprises a roller core 1, on the outside of which an elastic reference layer 2 is provided is.
- the reference layer 2 As in the middle, partially torn area of the reference layer 2 can be seen, this consists of a variety of, for example fiber bundles consisting of carbon, glass or aramid fibers 3, which are essentially parallel in one layer and in one next layer are wound obliquely on the roll core 1.
- the Reference layer 2 can be a large number of such through the fiber bundle 3 formed fiber layers 4 (Fig. 2), for example between 10 and 50 fiber layers 4, be formed.
- the fiber layers 4 are embedded in an elastic matrix material 5 (FIG. 2) and together with this form the elastic reference layer 2. Due to the elastic matrix material 5, the reference layer 2 receives its required Elasticity, the fiber bundle 3 has the required rigidity generate the reference layer 2.
- the longitudinal recesses 8, 9 are slot-shaped longitudinal recesses 8, 9 formed, the longitudinal recesses 8, as indicated by the torn illustration, not through the entire thickness of the elastic reference layer 2 extend, but, as can be seen from Fig. 2, only as Depressions formed on the inside of the elastic reference layer 2 are.
- the longitudinal recesses 8, 9 can also extend the entire thickness of the elastic reference layer 2, as exemplified by the longitudinal recesses 9 in FIG. 1 is.
- Bolt-shaped engagement elements engage in the longitudinal recesses 8, 9 10 a, which are formed on the surface of the roll core 1.
- the bolt-shaped Engagement elements 10 have a diameter that essentially that existing in the circumferential direction of the reference layer 2 clear width of the longitudinal recesses 8, 9 corresponds. Thus at in the longitudinal recesses 8, 9 arranged bolt-shaped engagement elements 10 a twisting of the elastic reference layer 2 on the Roll core 1 prevented.
- the longitudinal recesses 8, 9 Due to the elongated, axially aligned design the longitudinal recesses 8, 9, however, is a longitudinal displacement of the elastic reference layer 2 on the roller core 1 in the direction of arrows 11, 12 possible, since in principle the elastic reference layer 2 is not for example glued, but freely movable on the roll core 1 is.
- the roller When the roller heats up, for example during operation, it expands elastic reference layer 2 due to its relative to the roll core 1 larger coefficients of thermal expansion in the axial direction more from as the roll core 1, so that the ends 6, 7 of the elastic reference layer 2 move in the direction of arrows 11, 12. A tension load between the roll core 1 and the elastic reference layer 2 therefore does not occur due to the different dimensions.
- a thin separating layer 13 may be arranged can, which consists for example of silicone.
- the interface can one have the function of a lubricant, so that the elastic reference layer 2 despite their press fit on the roll core 1 in axial Direction is slidable.
- the separating layer 13 can be made of corrosion-inhibiting or -preventive material, so that the Surface of the roll core 1 is protected against corrosion.
Landscapes
- Rolls And Other Rotary Bodies (AREA)
- Paper (AREA)
Abstract
Description
- Fig. 1
- eine teilweise aufgebrochen dargestellte Seitenansicht einer erfindungsgemäßen ausgebildeten Walze und
- Fig. 2
- einen Teilquerschnitt durch die erfindungsgemäß ausgebildete Walze gemäß Fig. 1.
- 1
- Walzenkern
- 2
- elastische Bezugsschicht
- 3
- Faserbündel
- 4
- Faserlagen
- 5
- elastisches Matrixmaterial
- 6
- stirnseitiges Ende
- 7
- stirnseitiges Ende
- 8
- Längsausnehmungen
- 9
- Längsausnehmungen
- 10
- bolzenförmige Eingriffselemente
- 11
- Pfeil
- 12
- Pfeil
- 13
- Trennschicht
Claims (13)
- Walze, insbesondere zum Glätten von Papierbahnen, mit einem insbesondere aus Metall bestehenden harten Walzenkern (1), der an seiner Außenseite mit einer ein elastisches Matrixmaterial (5) umfassenden elastischen Bezugsschicht (2) versehen ist,
dadurch gekennzeichnet,daß die elastische Bezugsschicht (2) drehfest aber längsverschiebbar auf dem Walzenkern (1) angeordnet ist. - Walze nach Anspruch 1,
dadurch gekennzeichnet,daß die elastische Bezugsschicht (2) spielfrei, insbesondere im Preßsitz auf dem Walzenkern (1) angeordnet ist. - Walzen nach Anspruch 1 oder 2,
dadurch gekennzeichnet,daß zwischen der elastischen Bezugsschicht (2) und dem Walzenkern (1) eine Trennschicht (13) insbesondere zur Reibungsverminderung zwischen der elastischen Bezugsschicht (2) und dem Walzenkern (1) vorgesehen ist, insbesondere daß die Trennschicht (13) aus Silikon und/oder aus einer im wesentlichen monomolekularen Schicht und/oder aus einem korrosionshemmenden oder -verhütenden Material besteht. - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß der Wärmeausdehnungskoeffizient der elastischen Bezugsschicht (2) größer ist als der Wärmeausdehnungskoeffizient des Walzenkerns (1). - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß an der Oberfläche des Walzenkerns (1) Drehsicherungs- und Führungselemente (10) vorgesehen sind, die mit an der elastischen Bezugsschicht (2) vorgesehenen Gegenelementen (8, 9) zusammenwirken, so daß die elastischen Bezugsschicht (2) auf dem Walzenkern (1) längsverschiebbar aber drehfest befestigt ist, insbesonderedaß in und/oder an der elastischen Bezugsschicht (2), insbesondere in und/oder an der radial innen gelegenen Oberfläche der elastischen Bezugsschicht (2) eine oder mehrere sich im wesentlichen in axialer Richtung erstreckende Längsführungen (8, 9) vorgesehen sind, und daß an der Oberfläche des Walzenkerns (1) insbesondere bolzenförmige Eingriffselemente (10) vorgesehen sind, die in die Längsführungen (8, 9) eingreifen, wobei bevorzugt die Längsführungen an dem Walzenkern und die Eingriffselemente an der elastischen Bezugsschicht vorgesehen sind. - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß in dem Matrixmaterial (5) der elastischen Bezugsschicht (2) eine oder mehrere Faserlagen (4) eingebettet sind, insbesondere daß die Faserlagen (4) zumindest teilweise durch schräg zur Oberfläche des Walzenkerns (1) verlaufende Faserbündel (3) gebildet werden und insbesondere sich kreuzende Faserbündel (3) umfassen. - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß die elastische Bezugsschicht (2) eine radial außenliegende Funktionsschicht und eine radial innenliegende Verbindungsschicht zum Verbinden der Funktionsschicht mit dem Walzenkern (1) umfaßt, insbesondere daß der Fasergehalt der Verbindungsschicht höher ist als der Fasergehalt der Funktionsschicht und/oder daß der Fasergehalt der Verbindungsschicht in deren radial außenliegendem Bereich im wesentlichen gleich groß wie der Fasergehalt der Funktionsschicht in deren radial innenliegendem Bereich ist. - Walze nach Anspruch 6 oder 7,
dadurch gekennzeichnet,daß der Fasergehalt der Bezugsschicht (2) radial von innen nach außen variiert, insbesondere abnimmt und/oderdaß im radial außen gelegenen Bereich der Bezugsschicht (2) der Fasergehalt im wesentlichen gleich Null ist und/oderdaß die Fasern der Faserlagen (4) als Glas- und/oder als Kohlefasern ausgebildet sind. - Walze nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,daß das Matrixmaterial (2) ein Kunststoff, insbesondere ein Duroplast oder ein Thermoplast ist und/oderdaß das Matrixmaterial (2) aus einer Harz/Härter-Kombination besteht. - Verfahren zum Herstellen einer elastischen Walze mit einem insbesondere aus Metall bestehenden harten Walzenkern und einer ein elastisches Matrixmaterial umfassenden elastischen Bezugsschicht, insbesondere zum Herstellen einer Walze nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet,daß die elastische Bezugsschicht längsverschiebbar aber drehfest auf den Walzenkern aufgebracht wird. - Verfahren nach Anspruch 10,
dadurch gekennzeichnet,daß die elastische Bezugsschicht auf den Walzenkern aufgeschrumpft wird und/oderdaß vor Aufbringen der elastischen Bezugsschicht auf den Walzenkern eine Trennschicht, insbesondere zur Reibungsverminderung zwischen der Bezugsschicht und dem Walzenkern, aufgebracht wird. - Verfahren nach Anspruch 10 oder 11,
dadurch gekennzeichnet,daß zur Erzeugung der Bezugsschicht eine Vielzahl von Fasern, insbesondere in mehreren Faserlagen übereinander, auf den Walzenkern oder einen insbesondere zylindrischen Wickelkörper aufgewickelt wird. - Verfahren nach Anspruch 12,
dadurch gekennzeichnet,daß die Fasern in Form eines oder mehrerer Faserbündel und/oder Faserrovings und/oder Faservliese auf den Walzenkern oder einen insbesondere zylindrischen Wickelkörper aufgewickelt werden, wobei ein Roving jeweils aus einer Vielzahl von nebeneinanderliegenden Fasern der gleichen Art besteht, und/oderdaß die Fasern vor dem Aufwickeln auf den Walzenkern oder einen insbesondere zylindrischen Wickelkörper mit dem Matrixmaterial umgeben werden, insbesondere durch ein Matrixbad gezogen werden, oder daß die Fasern im wesentlichen trocken auf den Walzenkern oder einen insbesondere zylindrischen Wickelkörper aufgewickelt werden und während oder nach dem Aufwickeln mit dem Matrixmaterial beaufschlagt, insbesondere vollständig in das Matrixmaterial eingebettet werden, und/oderdaß die Fasern schräg, insbesondere im Kreuzverbund auf den Walzenkern oder einen insbesondere zylindrischen Wickelkörper aufgewickelt werden und/oderdaß als Fasern Glas- und/oder Kohlefasern verwendet werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19928753 | 1999-06-23 | ||
DE19928753A DE19928753A1 (de) | 1999-06-23 | 1999-06-23 | Elastische Walze und Verfahren zum Herstellen einer solchen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1063351A2 true EP1063351A2 (de) | 2000-12-27 |
EP1063351A3 EP1063351A3 (de) | 2001-11-14 |
EP1063351B1 EP1063351B1 (de) | 2004-06-23 |
Family
ID=7912256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00107312A Expired - Lifetime EP1063351B1 (de) | 1999-06-23 | 2000-04-04 | Elastische Walze und Verfahren zum Herstellen einer solchen |
Country Status (3)
Country | Link |
---|---|
US (1) | US6520896B1 (de) |
EP (1) | EP1063351B1 (de) |
DE (2) | DE19928753A1 (de) |
Families Citing this family (10)
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PT1245844E (pt) * | 2001-03-29 | 2012-06-05 | Georgia Pacific Consumer Prod | Rolo para estampagem em relevo gravado a laser |
US20030045412A1 (en) * | 2001-07-13 | 2003-03-06 | Schulz Galyn A. | Laser engraved embossing roll with wear-resistant coatings and method of making them |
DE10156146A1 (de) | 2001-11-15 | 2003-05-28 | Voith Paper Patent Gmbh | Walzenmantel |
US6716147B1 (en) * | 2003-06-16 | 2004-04-06 | Pyrotek, Inc. | Insulated sleeved roll |
US20050113229A1 (en) * | 2003-11-25 | 2005-05-26 | General Electric Company | Universal mandrel |
US7297226B2 (en) * | 2004-02-11 | 2007-11-20 | Georgia-Pacific Consumer Products Lp | Apparatus and method for degrading a web in the machine direction while preserving cross-machine direction strength |
US8616125B2 (en) * | 2006-03-20 | 2013-12-31 | The Procter & Gamble Company | Compliant embosser assembly |
US7784386B2 (en) * | 2007-06-29 | 2010-08-31 | Lee Tack Plastic & Metal Manufactory Ltd | Paper cutting apparatus |
DE102009011585A1 (de) * | 2009-03-06 | 2010-09-09 | Frank, Egon, Dr. | Bauteil und Verfahren zu seiner Herstellung |
FR2965868B1 (fr) * | 2010-10-07 | 2012-11-02 | Snecma Propulsion Solide | Rouleau en materiau composite pour recuit haute temperature |
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-
1999
- 1999-06-23 DE DE19928753A patent/DE19928753A1/de not_active Withdrawn
-
2000
- 2000-04-04 EP EP00107312A patent/EP1063351B1/de not_active Expired - Lifetime
- 2000-04-04 DE DE50006870T patent/DE50006870D1/de not_active Expired - Fee Related
- 2000-06-22 US US09/598,909 patent/US6520896B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB968938A (en) * | 1961-07-11 | 1964-09-09 | Kuesters Eduard | Improvements in calendering rollers |
US4551894A (en) * | 1983-10-17 | 1985-11-12 | Beloit Corporation | Urethane covered paper machine roll with vented interface between roll and cover |
DE3832999A1 (de) * | 1988-09-29 | 1990-04-05 | Herbert Rottmann | Rotationssymmetrische walze, insbesondere fuer maschinen der foerdertechnik |
Also Published As
Publication number | Publication date |
---|---|
EP1063351A3 (de) | 2001-11-14 |
DE50006870D1 (de) | 2004-07-29 |
EP1063351B1 (de) | 2004-06-23 |
DE19928753A1 (de) | 2000-12-28 |
US6520896B1 (en) | 2003-02-18 |
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