EP0732445B1 - Kalander für die Behandlung einer Papierbahn - Google Patents
Kalander für die Behandlung einer Papierbahn Download PDFInfo
- Publication number
- EP0732445B1 EP0732445B1 EP96103277A EP96103277A EP0732445B1 EP 0732445 B1 EP0732445 B1 EP 0732445B1 EP 96103277 A EP96103277 A EP 96103277A EP 96103277 A EP96103277 A EP 96103277A EP 0732445 B1 EP0732445 B1 EP 0732445B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- calender according
- rolls
- soft
- calender
- 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
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
- D21G1/0233—Soft rolls
Definitions
- the invention relates to a calender with a Roll stack between a hard and each working gap formed by a soft roller and one alternating gap formed between two soft rollers has for the treatment of a paper web, which in the working columns for a dwell time each Is exposed to compressive stress.
- Such calenders are for example from the prospectus "The new super calender concepts" from Sulzer Papertec Krefeld GmbH from May 1994. You serve to satin coated and uncoated papers, for example printing paper or silicone base paper.
- Metal rollers are referred to as “hard” rollers a smooth and hard surface that essentially are responsible for the smoothness and shine.
- Soft” rolls are rolls with a elastic or soft surface that essentially ensure even compaction. Of the Alternating gap is required so that both sides of the Paper web experience an approximately even treatment. It is common to use a calender with 12 to 16 rolls use, with the alternating gap in the lower Half of the stack is located.
- the invention has for its object a calender of the type described at the outset, to a large extent the same satin results for a particular one Paper type, but a smaller one Construction height and its manufacturing and operating costs are lower.
- the roll stack has less than 10 rolls that the alternating gap is arranged in the middle of the stack is, i.e. with an even number of rollers between the two middle rollers and between an odd number of rollers the middle roller and an adjacent roller, and that the effective weight of the rollers and possibly so connected parts is so small that the sum of the Line loads of the working column above the alternating gap at least 80% of the total of the line loads of the Working gap below the alternating gap is.
- the calender Since the calender has a lower overall height, needed one also lower buildings, what the set-up costs significantly lowers. Furthermore, the calender is due the lower number of rollers in both the manufacture and inexpensive to operate.
- the roll stack has eight rollers.
- Such an 8-roll calender which is above and below the alternating gap
- the Web treatment below the alternating gap is in both Cases the same.
- the web treatment above the Alternating slit is eliminated with four working slits carried out; this is, however around the working column with the least amount of deformation.
- the calendering performance can be improved even more take into account that the sum of the products from dwell time and medium compressive stress in the working columns above the alternating gap at least 80% of the Total of the products mentioned in the working columns below of the exchange gap. Because dwell time and Compressive stress are two key factors in the Paper deformation.
- rollers be light in weight. This happens in the case of the hard rollers in that they have the smallest possible Get diameter. With the soft rollers should be used instead of the compact and heavy rollers Use lighter structures with paper cover.
- the soft Rolls contain voids.
- the soft Rolls contain voids.
- hollow tubes provided with a cover are considered.
- the soft roller a fiber-reinforced plastic, such as epoxy resin.
- fiber reinforcement especially with Carbon fiber, can be stability and light weight unite with each other.
- top and / or bottom roller one is soft roller. If both end rollers are soft, the result is a 6-roll calender. If only one end roller is soft, you can stack rolls with an odd number of rolls provide. Soft end rollers can also be used lighter weight than hard end rollers, what the adjustment of the line load totals above and relieved below the exchange gap.
- roller jacket is made of lamellar graphite cast iron, so a cast iron with lamellar Graphite. Its wall thickness can be compared a cast iron roller jacket reduced by almost 50% will.
- this cast iron is not very wear-resistant.
- the cover made of elastic plastic as Wear protection layer serves. It is sufficient for this purpose a layer thickness between 8 and 15 mm, preferably 10 mm.
- the upper and / or lower rollers can advantageously be heated. It is therefore already in the first and also in the last gap Heat can be supplied on both sides of the paper web Offers correction options.
- heating by means of steam can be used here take place, which can be fed with overpressure.
- This type of heating is much simpler and cheaper than heating with oil, like in a heated deflection compensation roller required would.
- top and / or bottom roller is a deflection controllable roll in which a roller jacket on hydrostatic support elements a penetrating, non-rotatable support is supported.
- the deflection control allows the line load across the width of the paper web to keep constant in order to achieve a very even satin finish to achieve.
- the calender 1 illustrated in FIG. 1 has one Roll stack, which consists of eight rolls, namely a heatable, deflection-controllable hard Top roller 2, a soft roller 3, a heatable hard roller 4, a soft roller 5, a soft Roller 6, a heatable hard roller 7, a soft one Roller 8 and a heated, deflection controllable hard bottom roller 9. Result in this way six working columns 10 to 15, each by one hard roller and a soft roller are limited, and in the middle of which is an alternating gap 16, which is divided by two soft Rollers 5 and 6 is limited.
- a paper web 17 is fed from a paper machine 18, passes under the guidance of idlers 19 the working column 10 to 12, the alternating gap 16 and the working column 13 to 15, whereupon it in a kelvorraum 20 is wound.
- the top three Working columns 10 to 12 is the paper web with the one side, in the three lower working columns 13 to 15 with the other side on the hard rollers, see above that the desired surface structure on both sides, for example Gloss or smoothness is achieved.
- the top sum should be at least Amount to 80% of the lower sum.
- the calender had a width of 8.5 m and a web speed of 800 m / min. Alone by saving weight on the soft rollers the sum of the products reached around 40% mean compressive stress p and dwell time t in the working gaps a value above the alternating gap 16 of 82% of the total of the products in the below the Alternating gap working columns. By more of the measures listed can be done in the vertical Stack even higher values, for example 83 to 86% achieve. With special constructions such as the inclined one Stack, higher values are also achievable.
- the compressive stress p in the working gap was between 45 and 60 N / mm 2 .
- the heated rollers 2, 4, 7 and 9 were given a surface temperature between 100 and 150 ° C.
- the diameter of the soft rollers and the elasticity of their coating 34 were chosen so that there was a gap width of about 2 to 15 mm , preferably about 8 mm. Depending on the web speed, this leads to dwell times t in each working gap of 0.1 to 0.9, preferably 0.2 to 0.5 ms. It is preferred if the temperature T is only slightly above the lower limit, for example 110 ° C., if the compressive stress p is only slightly above the lower limit, for example 50 N / mm 2 . Compared to a 12-roll calender, slight increases in thermal and mechanical energy are therefore sufficient to achieve the same calendering results in an 8-roll calender.
- a 4-roll calender can also be used on the same principle be built up for simpler applications sufficient, but also one on both sides causes approximately the same satin finish.
- the roll stack illustrated in FIG. 4 has one soft top roller 102 and a soft bottom roller 109 on.
- the alternating gap located exactly in the middle 116 is limited by two soft rollers 105 and 106.
- Two hard rollers 103 and 107, which end rollers 102 and 109 are adjacent with water vapor is supplied with overpressure, heated.
- FIG. 5 shows a 9-roll calender, which is a soft top roller 202, but a hard bottom roller 209 has.
- the changing gap 216 is between the soft middle roller 205 and the soft neighboring roller 206 arranged. Otherwise change heated ones hard center rolls with soft rolls.
- roller shells can be similar to be constructed in Fig. 3 and for example a support tube have spheroidal or lamellar graphite cast iron and wear a cover made of elastic plastic.
Landscapes
- Paper (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
- Fig. 1
- eine schematische Darstellung eines erfindungsgemäßen Kalanders,
- Fig. 2
- eine abgewandelte Ausführungsform,
- Fig. 3
- einen Schnitt durch eine weiche Walze,
- Fig. 4
- schematisch einen 6-Walzen-Kalander,
- Fig. 5
- schematisch einen 9-Walzen-Kalander und
- Fig. 6
- schematisch einen 7-Walzen-Kalander.
Claims (18)
- Kalander mit einem Walzenstapel, der zwischen jeweils einer harten und einer weichen Walze gebildete Arbeitsspalte und einem zwischen zwei weichen Walzen gebildeten Wechselspalt aufweist, für die Behandlung einer Papierbahn, die in den Arbeitsspalten jeweils für eine Verweilzeit einer Druckspannung ausgesetzt ist, dadurch gekennzeichnet, daß der Walzenstapel weniger als 10 Walzen aufweist, daß der Wechselspalt (16) in der Mitte des Stapels angeordnet ist, d.h. bei gerader Walzenzahl zwischen den beiden mittelsten Walzen und bei ungerader Walzenzahl zwischen der mittelsten Walze und einer benachbarten Walze, und daß das wirksame Gewicht der Walzen (2 bis 8) und eventuell damit verbundener Teile so gering ist, daß die Summe der Streckenlasten (f1 + f2 + f3) der Arbeitsspalte (10, 11, 12) oberhalb des Wechselspalts (16) mindestens 80 % der Summe der Streckenlasten (f4 + f5 +f6) der Arbeitsspalte (13, 14, 15) unterhalb des Wechselspaltes (16) beträgt.
- Kalander nach Anspruch 1, dadurch gekennzeichnet, daß der Walzenstapel acht Walzen (2 bis 9) aufweist.
- Kalander nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Summe der Produkte aus Verweilzeit (t) und mittlerer Druckspannung (P) in den Arbeitsspalten (10, 11, 12) oberhalb des Wechselspaltes (16) mindestens 80 % der Summe der genannten Produkte in den Arbeitsspalten (13, 14, 15) unterhalb des Wechselspalts (16) beträgt.
- Kalander nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Wirkebene des Walzenstapels zur Vertikalen geneigt ist.
- Kalander nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die weichen Walzen (3) Hohlräume (33) enthalten.
- Kalander nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die weiche Walze (3) einen Kunststoffmantel (34) aufweist.
- Kalander nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die weiche Walze (3) einen faserverstärkten Kunststoff aufweist.
- Kalander nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Ober- und/oder Unterwalze (102, 109; 202; 309) eine weiche Walze ist.
- Kalander nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die weiche Walze (102, 109; 202, 309) einen Walzenmantel (32) aufweist, der aus einem Material unzureichender Verschleißfestigkeit besteht und einen Bezug (34) aus einem elastischen Kunststoff trägt, und daß der Kunststoff eine höhere Verschleißfestigkeit hat als das Mantelmaterial.
- Kalander nach Anspruch 9, dadurch gekennzeichnet, daß der Walzenmantel (32) aus Lamellengraphitguß besteht.
- Kalander nach Anspruch 9, dadurch gekennzeichnet, daß der Walzenmantel (32) aus Kugelgraphitguß besteht.
- Kalander nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß zumindest eine harte Walze (2, 4, 7, 9) beheizbar ist.
- Kalander nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Ober- und/oder Unterwalze (2, 9) hart und beheizbar ist.
- Kalander nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß zumindest die oberste Mittelwalze (4; 103) hart und beheizbar ist.
- Kalander nach Anspruch 14, dadurch gekennzeichnet, daß alle harten Mittelwalzen (4, 6, 8, 11, 13; 103, 107) beheizbar sind.
- Kalander nach Anspruch 14 oder 15, dadurch gekennzeichnet, daß die Beheizung mittels Wasserdampf erfolgt, der mit Überdruck zuführbar ist.
- Kalander nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß die Ober- und/oder Unterwalze (2, 9; 102, 109; 202, 209; 302, 309) eine durchbiegungssteuerbare Walze ist, bei der ein Walzenmantel über hydrostatische Stützelemente (27, 28) auf einem ihn durchsetzenden, drehfest gehaltenen Träger abgestützt ist.
- Kalander nach Anspruch 8 und 17, dadurch gekennzeichnet, daß die durchbiegungssteuerbare Walze (102, 109; 202; 309) eine Vielzonen-Steuerung aufweist, bei der den Stützelementen (27, 28) einzeln oder paarweise Druckflüssigkeit mit unterschiedlichem Druck zuführbar ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19508351 | 1995-03-09 | ||
DE19508351 | 1995-03-09 | ||
DE19534911A DE19534911C2 (de) | 1995-03-09 | 1995-09-20 | Kalander für die Behandlung einer Papierbahn |
DE19534911 | 1995-09-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0732445A1 EP0732445A1 (de) | 1996-09-18 |
EP0732445B1 true EP0732445B1 (de) | 1998-10-21 |
EP0732445B2 EP0732445B2 (de) | 2004-09-08 |
Family
ID=26013182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96103277A Expired - Lifetime EP0732445B2 (de) | 1995-03-09 | 1996-03-04 | Kalander für die Behandlung einer Papierbahn |
Country Status (5)
Country | Link |
---|---|
US (1) | US5655442A (de) |
EP (1) | EP0732445B2 (de) |
JP (1) | JP2612679B2 (de) |
CA (1) | CA2169976C (de) |
DE (1) | DE29521610U1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19729531C2 (de) | 1997-07-10 | 2002-12-12 | Voith Paper Patent Gmbh | Papierkalander |
SE511203C2 (sv) * | 1997-10-14 | 1999-08-23 | Valmet Corp | Långnypspress samt långnypspressko till densamma |
DE19803323C2 (de) * | 1998-01-29 | 2003-06-05 | Voith Paper Patent Gmbh | Verfahren zur Beeinflussung eines Bahnmaterials, wie Papier, und Kalander zur Durchführung des Verfahrens |
US7096779B2 (en) * | 1998-03-17 | 2006-08-29 | Eduard Küsters Maschinenfabrik GmbH & Co. KG | Calender arrangement |
DE19811474A1 (de) * | 1998-03-17 | 1999-09-23 | Kuesters Eduard Maschf | Kalanderanordnung |
DE19820089C2 (de) * | 1998-05-06 | 2000-06-15 | Kuesters Eduard Maschf | Verfahren zum Kalandrieren einer Warenbahn mit einem vertikalen Mehrwalzen-Kalander |
DE19832065A1 (de) * | 1998-07-16 | 2000-01-20 | Voith Sulzer Papiertech Patent | Kalanderanordnung für Bahnen aus Papier oder ähnlichem Material |
JP2003508641A (ja) * | 1999-08-27 | 2003-03-04 | メトソ ペーパ インコーポレイテッド | シューロール |
FI20000615A (fi) * | 2000-03-16 | 2001-09-17 | Metso Paper Inc | Kalanteri ja menetelmä kalanterin telan vaihtamiseksi |
FI20001362A0 (fi) * | 2000-06-07 | 2000-06-07 | Valmet Corp | Menetelmä paperirainan profiloimiseksi |
DE50102790D1 (de) * | 2001-03-22 | 2004-08-12 | Kuesters Eduard Maschf | Kalander |
US7492965B2 (en) * | 2004-05-28 | 2009-02-17 | Lockheed Martin Corporation | Multiple map image projecting and fusing |
DE102005016781B3 (de) * | 2005-04-12 | 2006-03-30 | Eduard Küsters Maschinenfabrik GmbH & Co. KG | Kalander |
DE102013200614A1 (de) | 2013-01-16 | 2014-07-17 | Valmet Technologies, Inc. | Vorrichtung und Verfahren zur Kalandrierung einer Faserbahn |
WO2020154126A1 (en) | 2019-01-22 | 2020-07-30 | Pontus Subsea Connectors Llc | Underwater mateable and un-mateable electrical connector |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB202753A (en) * | 1922-05-31 | 1923-08-30 | Samuel Milne | Improvements in calenders for calendering paper and the like |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2300994A (en) * | 1938-08-09 | 1942-11-03 | Cons Water Power & Paper Co | Calender for paper |
US3154008A (en) * | 1963-02-09 | 1964-10-27 | Dominion Eng Works Ltd | Calender stack |
US3291039A (en) * | 1964-04-20 | 1966-12-13 | John A Manning Paper Co Inc | Paper calender roll |
US3340796A (en) * | 1964-11-25 | 1967-09-12 | Kimberly Clark Co | Paper supercalender stack |
US3451331A (en) * | 1967-03-01 | 1969-06-24 | Westvaco Corp | Hot roll supercalender |
FI62874C (fi) * | 1979-10-15 | 1983-03-10 | Valmet Oy | Pappers kalander |
US4283690A (en) * | 1979-12-31 | 1981-08-11 | Motorola, Inc. | Low power CMOS oscillator |
DE3640161A1 (de) * | 1985-12-23 | 1987-07-02 | Escher Wyss Gmbh | Vorrichtung zum zueinander positionieren von walzenflaechen |
DE3711334A1 (de) * | 1987-04-03 | 1988-10-13 | Escher Wyss Gmbh | Vorrichtung zur fuehrung der walzen eines im wesentlichen vertikalen kalanders |
US5237915A (en) * | 1992-02-04 | 1993-08-24 | The Mead Corporation | Mixed roll calender |
FI96334C (fi) * | 1993-11-24 | 1996-06-10 | Valmet Paper Machinery Inc | Menetelmä paperin tai vastaavan rainamateriaalin kalanteroinnissa ja menetelmää soveltava kalanteri |
DE29504034U1 (de) * | 1995-03-09 | 1995-05-04 | Voith Sulzer Finishing GmbH, 47803 Krefeld | Kalander für die zweiseitige Behandlung einer Papierbahn |
-
1995
- 1995-09-20 DE DE29521610U patent/DE29521610U1/de not_active Expired - Lifetime
-
1996
- 1996-02-21 CA CA002169976A patent/CA2169976C/en not_active Expired - Fee Related
- 1996-03-04 EP EP96103277A patent/EP0732445B2/de not_active Expired - Lifetime
- 1996-03-07 US US08/612,169 patent/US5655442A/en not_active Expired - Lifetime
- 1996-03-08 JP JP8051482A patent/JP2612679B2/ja not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB202753A (en) * | 1922-05-31 | 1923-08-30 | Samuel Milne | Improvements in calenders for calendering paper and the like |
Non-Patent Citations (2)
Title |
---|
Das Papier, 16. Jahrgang, Heft 7, Juli 1962, Seiten 277-285, Heinz Mac und Peter Schlegel: "Untersuchungen über den Glättvorgang auf dem Rollensatinierkalander" * |
Das Papier, Heft 10A, 1992, Seiten V182-V189, Peter Svenka: "Elastische Walzenbezüge für Superkalander und Softkalander" * |
Also Published As
Publication number | Publication date |
---|---|
EP0732445A1 (de) | 1996-09-18 |
CA2169976C (en) | 1998-12-01 |
JP2612679B2 (ja) | 1997-05-21 |
DE29521610U1 (de) | 1997-11-20 |
CA2169976A1 (en) | 1996-09-10 |
EP0732445B2 (de) | 2004-09-08 |
JPH08246382A (ja) | 1996-09-24 |
US5655442A (en) | 1997-08-12 |
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