EP2880217A1 - Walze und verfahren zur herstellung einer walze - Google Patents
Walze und verfahren zur herstellung einer walzeInfo
- Publication number
- EP2880217A1 EP2880217A1 EP13735029.4A EP13735029A EP2880217A1 EP 2880217 A1 EP2880217 A1 EP 2880217A1 EP 13735029 A EP13735029 A EP 13735029A EP 2880217 A1 EP2880217 A1 EP 2880217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxide
- ceramic
- layer
- ceramic layer
- roll
- 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
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/08—Pressure rolls
-
- 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
- D21G1/0246—Hard rolls
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/10—Location or type of the layers in shells for rollers of printing machines characterised by inorganic compounds, e.g. pigments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
Definitions
- the invention relates to a roller for use in a machine for producing or finishing a fibrous web such as a paper, board or tissue web according to the preamble of claim 1 and a method for producing such a roller according to the preamble of claim 12.
- Rollers are found in a machine for making web material in many positions. They perform a wide variety of tasks for guiding and guiding the fiber web and / or the fabrics, they can dewater, press, smooth or dry the fiber web.
- the rolls according to the preamble of claim 1 are used, for example, as a central press roll in the press section of the fiber web machine application.
- the fiber web entering from the forming section directly contacts the surface of the roller.
- the central press roll In the roll nip with the central press roll, a large part of the remaining moisture content is pressed out of the fiber web. Subsequently, the fiber web is pulled in a free train from the roller and transferred to the next section of the machine. This happens under a certain elongation and a resulting difference in speed. The difference determines the efficiency of the machine significantly. If the fibrous web is poorly released from the roll surface, it overstretches and, in the worst case, tears, resulting in undesirable and costly machine downtime.
- granite rolls were used in this position, whose material has different phases with different hygroscopies. However, such rolls are unsatisfactory in terms of their soiling resistance. Frequent service intervals were necessary until the granite rolls were peeled off by modern rollers with covers or coatings.
- Prior art rolls usually have an oxide ceramic coating on a hard roll core.
- a roller with such an oxide ceramic coating is disclosed, for example, in EP 0 870 867 B1.
- the roller has a ceramic layer in a thickness of 100 to 2000 ⁇ , which is applied to the frame portion of the roller, wherein the roughness R a of the outer surface of the roller 0.2 to 2.0 ⁇ and preferably 0.4 to 1, 5 ⁇ amounts.
- the ceramic layer contains 50 to 95% and preferably 55 to 80% of Cr 2 O 3 and 3 to 50% and preferably 20 to 45% of ⁇ 2.
- Other metal oxides may additionally be provided.
- a disadvantage of this known state of the art is that due to the high melting point and the rheological properties of the chromium oxide melt and in principle mixtures of chromium oxide and titanium oxide are difficult to melt. This leads to a low application rate during the plasma spraying process, which in turn leads to the layer being expensive in terms of raw material and process costs since it requires a multi-stage application in order to obtain a sufficient layer thickness.
- the roller comprises at least one ceramic layer which has at least partially an oxide compound in the form of a mixed oxide ceramic.
- the mixed oxide ceramic which has been mixed, melted, and placed in a substantially monophasic state prior to application to the roll, is significantly more economical to process than the individual metal oxide components of conventional prior art oxide ceramic coatings.
- the Order rate can be nearly doubled, which reduces manufacturing time and lowers process costs.
- the oxide compound in the form of a mixed oxide ceramic can be used to save material, since the losses during processing are lower than when applying two or more individual metal oxides.
- the mixed-oxide ceramic has at least two metal oxides, which are melted and mixed before application to the roll.
- the metal oxides may be selected from chromium oxide (Cr 2 O 3), titanium oxide ( ⁇ 2), aluminum oxide (Al 2 O 3), zirconium oxide (ZrO 2), silicon oxide (S1O 2), yttrium oxide (Y 2 O 3).
- Cr 2 O 3 chromium oxide
- Ti 2 O 3 titanium oxide
- Al 2 O 3 aluminum oxide
- ZrO 2 zirconium oxide
- Si oxide silicon oxide
- Y 2 O 3 yttrium oxide
- the mixed-oxide ceramic may preferably be in the form of Cr 2 Ti 2 O 7 or ⁇ 2 ⁇ 3.
- the mixed oxide Cr 2 Ti 2 O 7 based on a mixing ratio of 50% to 95%, preferably 55% to 80% Cr 2 O 3 and 3% to 50%, preferably 20% to 45% ⁇ 2 generated be.
- the at least one ceramic layer comprising at least one mixed-oxide ceramic is at least partially covered by at least one further ceramic layer.
- the at least one further ceramic layer may also comprise a metal oxide, which may be 99.9% pure, whereby the corrosion resistance can be improved.
- the metal oxide of at least one further layer can be selected from chrome oxide (Cr 2 O3), titanium oxide ( ⁇ 2), alumina (Al2O3), zirconium oxide (ZrO2), silicon oxide (SiO 2), yttria (Y 2 O 3).
- the at least one ceramic layer, which has the mixed-oxide ceramic should have a thickness of at least 100 to 1200 ⁇ m. This ensures adequate wear resistance at the expected line loads in various positions in the fiber web machine.
- the roller has a seal on the outermost of the layers. This increases the corrosion resistance of the roller.
- the seal may comprise a polymer or consist entirely of a polymer.
- the method may comprise, as a further method step, the application of a further ceramic layer.
- the further ceramic layer may comprise a 99.9% pure metal oxide, which covers the ceramic layer at least in some areas.
- the additional ceramic layer provides for higher abrasion resistance, lower corrosion tendency and improved sheet dispensing properties.
- sealing by a polymer or a polymer-containing mixture to the mixed-oxide ceramic or the further ceramic layer can take place.
- Fig. 2 in the same view as in Fig. 1, a second embodiment of an inventive roller formed.
- Fig. 1 is a section of a roller 1, which has the features of the invention is shown in a highly schematic sectional view. To simplify the illustration, the roll curvature has been disregarded. It should also be noted that the thickness of the individual layers of the roll 1 is not shown to scale. It should be symbolized only the sequence of layers.
- An inventively formed roller 1 usually has a roller core 2, which may consist of a metal such as steel or nowadays also of a plastic, in particular a fiber-reinforced plastic.
- the roll 1 can be used in various positions in a machine for producing or processing a fibrous web, such as a paper, board or tissue web.
- a fibrous web such as a paper, board or tissue web.
- the position of the central press roll in the press section of a fiber web machine will be discussed, since in this position technically the highest demands are placed on the roll 1 or its coating. This is especially true of sheet dispensing properties, wear resistance at high line loads in press nips, and corrosion resistance in wet environments.
- an adhesive layer 3 is initially provided, which serves for bonding between the roll core 2 and the next following layer. Since the adhesive layer 3 can be formed according to the prior art and thus known, a detailed description can be omitted.
- a first ceramic layer 4 is formed, which consists at least partially of an oxide compound in the form of a mixed oxide ceramic. Such oxidic compounds are referred to in technical language as so-called. MMO (mixed metal oxides).
- such a mixed-oxide ceramic is a ceramic which is built up from at least two different metal oxides and is brought onto the roll 1 in a substantially single-phase state before processing. This is done by mixing and melting the individual metal oxide components before they are sprayed onto the surface of the adhesive layer 3.
- Such processes are already known and usually involve the following steps: mixing the metal oxides, melting the batch, for example in an electric arc furnace, solidifying the melt, breaking the melt solidified in irregular shapes, grinding and possible thermal treatment steps, and sieving and sifting.
- Other methods involving melting and atomizing or sintering are also known.
- Preferred metal oxides may be chromium oxide, titanium oxide, aluminum oxide, yttrium oxide, zirconium oxide or silicon oxide. Of these, two or more are mixed and melted before processing to be applied to the roll. The processing is carried out by means of conventional guns, which are used in HVOF or flame spraying.
- a preferred embodiment provides for the use of a mixture of chromium oxide and titanium oxide in a mixing ratio of 50% to 95%, preferably 55% to 80% Cr 2 O 3 and 3% to 50%, preferably 20% to 45% TiO 2 .
- the mixed-oxide ceramic is then essentially single-phase as of Cr 2 Ti 2 O 7 before.
- the advantages of the oxidic compounds are manifold: they are easier to process because the melting and mixing does not occur during the flame spraying process, and therefore can be applied much more effectively.
- the processing speed can be up to twice that of conventional mixed ceramics, which are present only as a mixture of metal oxides.
- the necessary layer thickness of at least 100 ⁇ is thus achieved in a significantly shorter time, which makes the production of economic.
- the specified layer thicknesses are indispensable due to the expected line loads, for example in press positions of a fiber web machine.
- the peel strength can be improved. This means that the ceramic layer 4 with the mixed oxide ceramic adheres better to the adhesive layer 3 than a pure metal oxide such as chromium oxide. This increases the safety with regard to flaking between the adhesive layer 3 and the ceramic layer 4.
- a seal 7 may be provided on the fiber web contacting layer 4, which comprises, for example, a polymer or consists entirely of a polymer.
- a second embodiment of the invention is shown in the same representation as in Fig. 1.
- a layer structure with two ceramic layers 4, 5 is shown here.
- a further ceramic layer 5 is applied to the ceramic layer 4, which contains the composite oxide ceramic or consists of this, which has a pure metal oxide, such as chromium oxide. This is in high purity, for example in a purity of 3N (99.9%) before.
- the sheet release properties, wear resistance and corrosion resistance are improved over conventional multi-phase ceramic layers, since Cr 2 O 3 is harder and thus no selective release of volatile oxides takes place.
- the metal oxides suitable for the production of the mixed oxide ceramic can again be used, ie chromium oxide (Cr 2 O 3), titanium oxide (T1O2), aluminum oxide (Al 2 O 3), zirconium oxide (ZrO 2), silicon oxide (S1O 2), yttrium oxide (Y 2 O 3). wherein chromium oxide (Cr 2 Os) is preferred.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012213783.1A DE102012213783A1 (de) | 2012-08-03 | 2012-08-03 | Walze und Verfahren zur Herstellung einer Walze |
| PCT/EP2013/064569 WO2014019825A1 (de) | 2012-08-03 | 2013-07-10 | Walze und verfahren zur herstellung einer walze |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2880217A1 true EP2880217A1 (de) | 2015-06-10 |
| EP2880217B1 EP2880217B1 (de) | 2017-11-01 |
Family
ID=48771442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13735029.4A Active EP2880217B1 (de) | 2012-08-03 | 2013-07-10 | Walze und verfahren zur herstellung einer walze |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9428863B2 (de) |
| EP (1) | EP2880217B1 (de) |
| CN (1) | CN104520505A (de) |
| DE (1) | DE102012213783A1 (de) |
| WO (1) | WO2014019825A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE41455T1 (de) * | 1985-04-30 | 1989-04-15 | Yamauchi Corp | Presswalze fuer papiermaschinen. |
| FI890953L (fi) * | 1989-02-28 | 1990-08-29 | Valmet Paper Machinery Inc | Vals eller valsbelaeggning i cellulosamaskin, pappersmaskin eller efterbehandlingsmaskin foer papper och foerfarande foer framstaellning av denna samt anvaendning av denna. |
| FI101556B1 (fi) * | 1990-10-08 | 1998-07-15 | Yamauchi Corp | Paperikoneen puristustela |
| DE69809992T2 (de) | 1997-04-11 | 2003-07-24 | Metso Paper, Inc. | Walze für eine Papier- oder Kartonmaschine und Verfahren zur Herstellung der Walze |
| FI112266B (fi) * | 1997-04-11 | 2003-11-14 | Metso Paper Inc | Keraamipinnoitteinen puristintela vaikeisiin korroosio-olosuhteisiin, menetelmä telan valmistamiseksi ja pinnoitekoostumus |
| DE19756226A1 (de) * | 1997-12-17 | 1999-06-24 | Voith Sulzer Papiertech Patent | Preßwalze |
| FI117945B (fi) * | 1999-02-15 | 2007-04-30 | Metso Paper Inc | Menetelmä telan pinnoitteen tiivistämiseksi, telavaipan pinnoite ja keraamipinnoitettu tela |
| US6339883B1 (en) | 2000-02-25 | 2002-01-22 | Voith Sulzer Paper Technology North America, Inc. | Method of making a roll for paper-making machine |
| DE102005008487C5 (de) * | 2005-02-24 | 2011-08-18 | Praxair S.T. Technology, Inc., Conn. | Beschichteter Körper aus Kohlefaser verstärktem Kunststoff für Papier- und Druckmaschinen, insbesondere Walze, und Verfahren zum Herstellen eines solchen Körpers |
-
2012
- 2012-08-03 DE DE102012213783.1A patent/DE102012213783A1/de not_active Withdrawn
-
2013
- 2013-07-10 US US14/419,291 patent/US9428863B2/en active Active
- 2013-07-10 WO PCT/EP2013/064569 patent/WO2014019825A1/de not_active Ceased
- 2013-07-10 CN CN201380041325.8A patent/CN104520505A/zh active Pending
- 2013-07-10 EP EP13735029.4A patent/EP2880217B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014019825A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012213783A1 (de) | 2014-02-06 |
| CN104520505A (zh) | 2015-04-15 |
| EP2880217B1 (de) | 2017-11-01 |
| US9428863B2 (en) | 2016-08-30 |
| US20150308048A1 (en) | 2015-10-29 |
| WO2014019825A1 (de) | 2014-02-06 |
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