EP0732447B1 - Kalander für die zweiseitige Behandlung einer Papierbahn - Google Patents
Kalander für die zweiseitige Behandlung einer Papierbahn Download PDFInfo
- Publication number
- EP0732447B1 EP0732447B1 EP96103279A EP96103279A EP0732447B1 EP 0732447 B1 EP0732447 B1 EP 0732447B1 EP 96103279 A EP96103279 A EP 96103279A EP 96103279 A EP96103279 A EP 96103279A EP 0732447 B1 EP0732447 B1 EP 0732447B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolls
- calender according
- calender
- compressive stress
- designed
- 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
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Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- 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
-
- 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 invention relates to a calender for the two-sided treatment of a paper web, in particular for the production of rotogravure paper, with a from the end resilient roll stack, the hard rolls and soft rollers as well as between hard ones and has a working gap formed by a soft roller, some of the rollers being heatable.
- Calenders of this type are widely known, for example from the brochure "The New Super Calender Concepts" from Sulzer Papertec from 1994 (code 05/94 d). They are used for the final treatment of a paper web so that it has a desired value for smoothness, gloss, thickness, bulk and the like. receives, and are set up separately from a paper machine.
- the "soft" or elastic rollers have a cover consisting mainly of fiber material.
- the heated rollers have a surface temperature limited to around 80 ° C.
- the average compressive stress in the nips is between 15 and 30 N / mm 2 in normal operation, and about 40 N / mm 2 have already been used in the lowest working gap.
- a stack of 9 or 10 rollers is sufficient for papers that are easy to satin, such as writing paper. Such a large machine is expensive and takes up a lot of space.
- So-called compact calenders are also known, where a heated roller with a deflection controllable soft roller forms a gap and for two-sided treatment of the paper web also two such calenders are connected in series can.
- this can only be easily satinized Papers, but not technical papers, e.g. Silicon base papers as well as papers for gravure printing, produce.
- the heatable Rollers therefore have a surface temperature of 160 to 200 ° C. A lot of heat energy is radiated, which must be removed by air conditioning. Because the roller diameter is larger due to the strength than with the supercalender, high line loads must be be applied to achieve a desired satin finish to generate the necessary compressive stresses.
- replacement rollers for the elastic rollers expensive because it is deflectable should be.
- the invention has for its object a calender of the type described at the beginning, the smaller as well as cheaper to manufacture and operate is, but still allows excellent satin results.
- the 2 x 5-roll calender delivers practically the same Calendering results like a conventional 12-roll calender, the previously used for the production of gravure printing and other high quality papers considered necessary has been.
- the division into two stacks has the other Advantage that the dependence of the line load on the roll weight is lower, i.e. in the uppermost gap with a much higher line load than before can be worked.
- the dwell time is at most 0.9 ms and that the heating to a surface temperature of maximum 150 ° C. and the load to an average compressive stress of up to 60 N / mm 2 is designed. In fact, only a moderate increase in surface temperature and compressive stress is required.
- the residence time is 0.2 to 0.5 ms
- the surface temperature is 110 to 125 ° C.
- the average compressive stress is 45 to 55 N / mm 2 .
- top and / or bottom roller deflection are controllable. In this way, the Compression equalized across the entire width of the rollers will.
- the soft rollers have a plastic cover.
- Such plastic-related rollers are much better suited than rollers covered with fiber material for operation with increased medium compressive stress. They allow operation with a compressive stress of more than 42 N / mm 2 .
- the reference should be designed for a compressive strength of up to about 60 N / mm 2 .
- plastic cover in the consists essentially of fiber-reinforced epoxy resin.
- Such a plastic cover has a service life of at least twelve weeks.
- the stacks arranged in-line of a paper machine or coating machine are plastic covers that are for the sake of higher Compressive stress are desired, particularly suitable because - in contrast to covers made of fiber material - are much less sensitive to markings and are therefore rarely removed and ground have to.
- plastic covers that are for the sake of higher Compressive stress are desired, particularly suitable because - in contrast to covers made of fiber material - are much less sensitive to markings and are therefore rarely removed and ground have to.
- they have two stacks existing calenders have the further advantage that they are more suitable in-line because the current Paper web in each stack only by a smaller one Number of columns must be passed.
- all rollers have a drive.
- the paper web can therefore be drawn in with the calender running because all the reels are at the same speed can be brought before the column getting closed.
- the illustrated calender 1 has two roll stacks 3 and 4, each consisting of five rollers.
- the first stack 3 has a heatable deflection controllable hard top roller 5, a soft roller 6, one heated hard roller 7, a soft roller 8 and one Heated deflection-controllable hard lower roller 9 on.
- the second stack 4 has a heatable, deflection-controllable hard top roller 10, a soft roller 11, a heatable hard roller 12, a soft roller 13 and a heated deflection controllable hard Bottom roller 14 on.
- This way, in the first Stack 3 four working columns 15 to 18 and in the second Stack 4 four working columns 19 through 22, each limited by a hard roller and a soft roller are.
- a paper web 23 is fed from a paper machine 24, runs from top to bottom under Guide rollers 25 the working column of the first Stack 3 and then the working column of the second Stack 4, whereupon they in a winding device 26th is wound up.
- the paper web lies in the first stack 3 with one side and in the second stack 4 with the other side on the hard rollers, so that on both sides the desired surface structure, for example Gloss or smoothness.
- each of the rollers 5 to 14 has its own Drive 27. This allows the Paper web 23 during operation.
- Each of the soft ones Rollers 6, 8, 11 and 13 have a cover 28 Plastic, especially fiber-reinforced epoxy resin. This reference is less sensitive to marking than one Cover made of fiber material, so that for in-line operation much longer downtimes can be achieved. In addition, the cover with higher compressive stress be charged. It is also resistant to higher temperatures more durable than paper. As an example of this a cover from "TopTec 4" from Scapa Kern, Wimpassing / Austria called.
- the force P is used to ensure that the mean compressive stress p in the working gaps 15 to 22, or at least in the lowest gap, is between 45 and 60 N / mm 2 .
- the heater H it is ensured that the surface temperature of the heated rollers 5, 7, 9, 10, 12, 14 is between 100 and 150 ° C.
- the diameter of the rollers and the elasticity of the covering 28 are chosen so that there is a gap width of approximately 2 to 15 mm, preferably approximately 8 mm. Depending on the web speed, this leads to dwell times t in each working gap of 0.1 to 0.9 ms. It is preferred if the temperature T is only slightly above the lower limit, for example 110 ° C., and if the compressive stress is only slightly above the lower limit, for example 50 N / mm 2 .
- the printability of natural and light-coated papers is not necessarily related to the gloss or smoothness of the paper web, but rather to the compression or its reciprocal bulk (in cm 3 / g).
- the measure of the printability in the gravure printing process is determined by the number of "missing dots" (missing halftone dots in the quarter and halftone range). The best results in this regard can be obtained by ensuring that the above-mentioned limits are observed in all working columns.
- the results of the paper treatment can be improved further by the fact that the rollers, in particular the center rollers, are mounted in levers in an unillustrated manner, the overhanging weights being advantageously compensated for by supporting devices, as is known from EP 0 285 942 B1.
- each Stack 3 4 the top roller 5, 10, the bottom roller 9, 14 and the center roll 7, 12 are designed as hard rolls are that cooperate with soft rollers 6, 8, 11, 13. But there is also the possibility of the three train the first rolls as soft rolls and the middle rolls as hard, preferably heatable rolls 6, 8, 11 and 13 to be provided.
Landscapes
- Paper (AREA)
Description
Claims (12)
- Kalander für die zweiseitige Behandlung einer Papierbahn, insbesondere zur Erzeugung von tiefdruckfähigem Papier, mit einem vom Ende her belastbaren Walzenstapel, der harte Walzen und weiche Walzen sowie jeweils zwischen einer harten und einer weichen Walze gebildete Arbeitsspalte aufweist, wobei ein Teil der Walzen beheizbar ist, dadurch gekennzeichnet, daß zwei gleichartige Stapel (3, 4) mit je 5 Walzen (5 bis 9; 10 bis 14) vorgesehen sind, und daß zumindest für einen Arbeitsspalt (15 bis 22) als Bedingung gilt:a) die Spaltbreite ist so gewählt, daß die Verweilzeit (t) mindestens 0,1 ms beträgt,b) die Beheizung (H) einer den Arbeitsspalt begrenzenden beheizbaren Walze (5, 7, 9, 10, 12, 14) ist auf eine Oberflächentemperatur (T) von mindestens 100° C ausgelegtc) und die Belastung (P) der Walzen ist auf eine mittlere Druckspannung im Arbeitsspalt von mehr als 42 N/mm2 ausgelegt.
- Kalander nach Anspruch 1, dadurch gekennzeichnet, daß zumindest für den einen Arbeitsspalt (15 bis 22) die Bedingung gilt, daß die Verweilzeit (t) höchstens 0,9 ms beträgt und daß die Beheizung (H) auf eine Oberflächentemperatur von maximal 150°C und die Belastung (P) auf eine mittlere Druckspannung bis zu 60 N/mm2 ausgelegt ist.
- Kalander nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Verweilzeit (t) 0,2 bis 0,5 ms, die Oberflächentemperatur (T) 110 bis 125° C und die mittlere Druckspannung (p) 45 bis 55 N/mm2 beträgt.
- Kalander nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Bedingung für die Mehrheit der oder alle Arbeitsspalte (15 bis 22) gilt.
- Kalander nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Ober- und/oder Unterwalze (5, 9; 10, 14) durchbiegungssteuerbar sind.
- Kalander nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß Ober- und/oder Unterwalze (5, 9; 10, 14) hart und beheizbar sind.
- Kalander nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die weichen Walzen (6, 8, 11, 13) einen Kunststoffbezug (28) tragen.
- Kalander nach Anspruch 7, dadurch gekennzeichnet, daß der Kunststoffbezug (28) auf eine Druckspannungs-Belastbarkeit bis 60 N/mm2 ausgelegt ist.
- Kalander nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß der Kunststoffbezug (28) im wesentlichen aus faserverstärktem Epoxidharz besteht.
- Kalander nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Stapel in-line einer Papiermaschine (24) oder Streichmaschine angeordnet sind.
- Kalander nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß alle Walzen (5 bis 14) einen Antrieb (27) besitzen.
- Kalander nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Stapel (3, 4) von einer Schutzhaube (40) abgedeckt sind, die die Wärmeabstrahlung reduziert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19508353A DE19508353A1 (de) | 1995-03-09 | 1995-03-09 | Kalander für die zweiseitige Behandlung einer Papierbahn |
DE19508353 | 1995-03-09 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0732447A1 EP0732447A1 (de) | 1996-09-18 |
EP0732447B1 true EP0732447B1 (de) | 1998-11-25 |
EP0732447B2 EP0732447B2 (de) | 2004-12-29 |
Family
ID=7756123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96103279A Expired - Lifetime EP0732447B2 (de) | 1995-03-09 | 1996-03-04 | Kalander für die zweiseitige Behandlung einer Papierbahn |
Country Status (9)
Country | Link |
---|---|
US (1) | US5669295A (de) |
EP (1) | EP0732447B2 (de) |
JP (1) | JP2612681B2 (de) |
KR (1) | KR0160398B1 (de) |
AT (1) | ATE173776T1 (de) |
CA (1) | CA2169979C (de) |
DE (2) | DE19508353A1 (de) |
EA (1) | EA000317B1 (de) |
NO (1) | NO307617B1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19549669C2 (de) * | 1995-05-24 | 2002-10-10 | Voith Paper Patent Gmbh | Kalander |
DE19633671C2 (de) * | 1996-08-21 | 1999-03-11 | Voith Sulzer Finishing Gmbh | Kalander |
DE19811474A1 (de) * | 1998-03-17 | 1999-09-23 | Kuesters Eduard Maschf | Kalanderanordnung |
US7096779B2 (en) | 1998-03-17 | 2006-08-29 | Eduard Küsters Maschinenfabrik GmbH & Co. KG | Calender arrangement |
US20030126998A1 (en) * | 1998-03-17 | 2003-07-10 | Eduard Kusters Maschinenfabrik Gmbh & Co. Kg | Calender arrangement |
DE19940897C1 (de) * | 1999-08-27 | 2000-11-09 | Kuesters Beloit Gmbh & Co Kg | Kalander |
FI113072B (fi) * | 1999-09-29 | 2004-02-27 | Metso Paper Inc | Menetelmä monitelakalanteria varten ja monitelakalanteri |
FI20000145A0 (fi) | 2000-01-25 | 2000-01-25 | Valmet Corp | Kalanteri |
FI113288B (fi) * | 2000-02-16 | 2004-03-31 | Metso Paper Inc | Menetelmä ja laite paperin kalanteroimiseksi |
FI20001362A0 (fi) * | 2000-06-07 | 2000-06-07 | Valmet Corp | Menetelmä paperirainan profiloimiseksi |
DE10052187B4 (de) * | 2000-10-20 | 2013-12-24 | Voith Patent Gmbh | Verfahren zum Glätten einer Materialbahn sowie Kalander zur Durchführung des Verfahrens |
KR100435867B1 (ko) * | 2001-11-06 | 2004-06-12 | 한솔제지주식회사 | 종이 표면처리용 랩 칼렌더 |
JP2003153677A (ja) * | 2001-11-20 | 2003-05-27 | Japan Tobacco Inc | 棒状物品の製造装置 |
FI118857B (fi) * | 2003-01-02 | 2008-04-15 | Metso Paper Inc | Menetelmä kuiturainan kalanteroimiseksi ja kalanteri |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0732446A1 (de) * | 1995-03-09 | 1996-09-18 | Voith Sulzer Finishing GmbH | Kalander für die zweiseitige Behandlung einer Papierbahn |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US440377A (en) * | 1890-11-11 | Paper-calendering machine | ||
US628570A (en) * | 1899-04-03 | 1899-07-11 | Edward A Edmonds | Apparatus for imparting water-finish to paper. |
US715017A (en) * | 1902-07-08 | 1902-12-02 | Archibald Cameron | Paper-calendering machine. |
US1498237A (en) * | 1921-11-02 | 1924-06-17 | Daniels A Millard | Machine for surface finishing paper and similar materials |
US2300994A (en) * | 1938-08-09 | 1942-11-03 | Cons Water Power & Paper Co | Calender for paper |
US3153378A (en) * | 1961-12-04 | 1964-10-20 | Benjamin J H Nelson | Method of calendering |
US3270664A (en) * | 1964-06-22 | 1966-09-06 | Beloit Corp | Calender stack |
AT369063B (de) * | 1979-05-10 | 1982-12-10 | Escher Wyss Ag | Walzvorrichtung zum walzen von bahnfoermigen materialien |
FI62874C (fi) * | 1979-10-15 | 1983-03-10 | Valmet Oy | Pappers kalander |
FI72768B (fi) * | 1984-11-30 | 1987-03-31 | Waertsilae Oy Ab | Nerkylning av pappersbana i superkalander. |
FI71374C (fi) * | 1984-12-31 | 1986-12-19 | Valmet Oy | Foerfarande och anordning vid kalandrering av en bana |
DE3821027A1 (de) * | 1988-06-22 | 1989-12-28 | Kuesters Eduard Maschf | Kalanderanordnung |
DE4202047C2 (de) * | 1992-01-27 | 1995-08-31 | Escher Wyss Gmbh | Verfahren zur Linienkraftkorrektur |
US5237915A (en) * | 1992-02-04 | 1993-08-24 | The Mead Corporation | Mixed roll calender |
-
1995
- 1995-03-09 DE DE19508353A patent/DE19508353A1/de not_active Withdrawn
-
1996
- 1996-02-21 CA CA002169979A patent/CA2169979C/en not_active Expired - Fee Related
- 1996-03-04 AT AT96103279T patent/ATE173776T1/de not_active IP Right Cessation
- 1996-03-04 DE DE59600850T patent/DE59600850D1/de not_active Expired - Lifetime
- 1996-03-04 EP EP96103279A patent/EP0732447B2/de not_active Expired - Lifetime
- 1996-03-07 US US08/612,258 patent/US5669295A/en not_active Expired - Lifetime
- 1996-03-07 KR KR1019960005964A patent/KR0160398B1/ko not_active IP Right Cessation
- 1996-03-07 EA EA199600009A patent/EA000317B1/ru not_active IP Right Cessation
- 1996-03-08 JP JP8051489A patent/JP2612681B2/ja not_active Expired - Fee Related
- 1996-03-08 NO NO960976A patent/NO307617B1/no unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0732446A1 (de) * | 1995-03-09 | 1996-09-18 | Voith Sulzer Finishing GmbH | Kalander für die zweiseitige Behandlung einer Papierbahn |
Also Published As
Publication number | Publication date |
---|---|
NO960976D0 (no) | 1996-03-08 |
EP0732447B2 (de) | 2004-12-29 |
EA199600009A2 (ru) | 1996-10-01 |
CA2169979C (en) | 1999-03-23 |
NO307617B1 (no) | 2000-05-02 |
JPH08246383A (ja) | 1996-09-24 |
NO960976L (no) | 1996-09-10 |
EA199600009A3 (ru) | 1996-12-30 |
DE19508353A1 (de) | 1996-09-12 |
KR0160398B1 (ko) | 1999-01-15 |
CA2169979A1 (en) | 1996-09-10 |
EP0732447A1 (de) | 1996-09-18 |
JP2612681B2 (ja) | 1997-05-21 |
EA000317B1 (ru) | 1999-04-29 |
DE59600850D1 (de) | 1999-01-07 |
US5669295A (en) | 1997-09-23 |
ATE173776T1 (de) | 1998-12-15 |
KR960034576A (ko) | 1996-10-24 |
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