EP0748895B1 - Calendre - Google Patents

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Publication number
EP0748895B1
EP0748895B1 EP96108397A EP96108397A EP0748895B1 EP 0748895 B1 EP0748895 B1 EP 0748895B1 EP 96108397 A EP96108397 A EP 96108397A EP 96108397 A EP96108397 A EP 96108397A EP 0748895 B1 EP0748895 B1 EP 0748895B1
Authority
EP
European Patent Office
Prior art keywords
roller
rollers
calender according
casing
elastic
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
Application number
EP96108397A
Other languages
German (de)
English (en)
Other versions
EP0748895A2 (fr
EP0748895A3 (fr
Inventor
Heinrich Stein
Dieter Junk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0748895A2 publication Critical patent/EP0748895A2/fr
Publication of EP0748895A3 publication Critical patent/EP0748895A3/fr
Application granted granted Critical
Publication of EP0748895B1 publication Critical patent/EP0748895B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a calender according to the Preamble of claim 1.
  • Such a calender results, for example, from WO 95/14813.
  • Calenders are widely known, for example from the Brochure "The new supercalender concepts" of the company Sulzer Papertec Krefeld GmbH from 1994 (code 05 (94 d). They are used for the final treatment of a paper web, so that this one desired Value of smoothness, shine, thickness, Bulk and the like receives.
  • the "soft" or elastic rollers wear a mainly made of fiber material Reference. Unless part of the deformation energy as heat is to be supplied, the heating takes place by means of the hard center rolls. Top roller and bottom roller are also to be regarded as hard rollers because whose roller shells are made of chilled cast iron. Driven is usually the third roller from below.
  • the invention has for its object a calender of the type described at the outset, regarding the uniformity of the desired paper parameters offers better setting options.
  • the flexible roll shell is much easier deform than the known chilled cast iron jackets. This can be due to a smaller modulus of elasticity than with cast iron and / or can be realized with smaller wall thicknesses. Because the roller shell at least on the surface is provided with an elastic plastic the roller shell as an elastic roller, which can be lowest middle roller can assign a hard roller. The improved adjustability arises because of the support elements exerted forces to a much greater extent Dimensions act on the paper and not through the Stiffness of the roll shell are adulterated, and also because the hard roller changes local line loads the deflection compensation roller fully takes up and therefore the reactions of the deflection compensation roller are stronger on paper.
  • the effective weight becomes the deflection compensation roller considerably reduced. This is noticeable in terms of costs.
  • the minimum stretch load with which the calender can be operated At an upper roller designed according to the invention reduced also the minimum stretch load with which the calender can be operated.
  • the smaller wall thickness also leads to a smaller outer diameter and thus with the same line load to a higher compressive stress in the nip, resulting in better results leads.
  • Another advantage is that it runs smoothly of the calender increases. Due to the elastic Plastic becomes shocks from the roll stack subdued.
  • the deformability factor> 5 is. Values between 6 and 10 and more also come in Consideration.
  • the plastic has a higher Has wear resistance than the jacket material.
  • roller jacket is made of lamellar graphite cast iron, so a cast iron with lamellar Graphite.
  • This material has a modulus of elasticity which is about 25% below that of chilled cast iron lies.
  • the wall thickness can be compared to the chilled cast iron jacket be reduced by almost 50%.
  • deformability factors F between Reach 6 and 8.
  • this cast iron is only little wear-resistant.
  • Cover made of elastic plastic at the same time serves as a wear protection layer.
  • a plastic layer ceiling between 8 and 15 mm, preferably 10 mm.
  • roller jacket Spheroidal graphite cast iron i.e. a cast iron with spherical Graphite
  • a cover made of elastic plastic wearing This allows a reduction in wall thickness compared to chilled cast iron of up to 59% and leads to a deformation factor F above 8.
  • the plastic is particularly advantageous as it is fiber-reinforced Epoxy resin.
  • Glass or carbon fiber reinforced Epoxy resin can be designed so that the one hand desired elasticity and on the other hand the required Wear resistance is present.
  • the deflection compensation roller has a multi-zone control in which the support elements individually or in pairs can be fed with different pressure. While with a chilled cast iron roll jacket such an individual or pair control would have had little impact on the outside, is now an individual influence on the paper over very narrow areas already in the top working gap possible, from the outset to a high Uniformity of the desired parameters across the paper web leads.
  • top middle roll is heatable.
  • the paper web is therefore in the first working gap Deformation energy is supplied in the form of heat.
  • Top roller has the advantage that the top roller is much easier and can be done cheaper, less Exposed to temperatures and deformed more may without the seal suffering from this.
  • 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.
  • the calender illustrated in Fig. 1 has one Roll stack 1, which consists of twelve rolls, namely an upper roller 2 and a lower roller 3, both are designed as a deflection compensation roller, and ten intermediate rolls arranged between them.
  • a heatable hard from top to bottom Roller 4 is an elastic roller 5, a heatable hard one Roller 6, an elastic roller 7, a heatable hard Roller 8, two elastic rollers 9 and 10, a driven, heated hard roller 11, an elastic Roller 12 and a heated hard roller 13.
  • the elastic Rollers 5, 7, 9, 10 and 12 each have a cover 14 made of elastic plastic.
  • the jacket 15 the upper roller 2 and the jacket 15a of the lower roller 3 consist essentially entirely of elastic Plastic or wear a cover 27a from such elastic plastic (Fig. 2), so that the top roller 2 and lower roller 3 act as elastic rollers. Therefore, between the elastic rollers 9 and 10 Alternating gap 16 formed. All other columns are working columns 17, each by an elastic roller and a hard roller are limited.
  • a paper web 18 is either fed directly from a paper machine or fed from an unwinder 19, passes under the guidance of idlers 20 first six working column 17, then the alternating gap 16 and finally four other working columns 17, whereupon it is wound up in a winder 21 becomes.
  • the paper web lies in the six upper working columns 18 with one side, in the four lower ones Working columns with the other side on the elastic Rolls on, so that the desired surface structure on both sides, for example gloss or smoothness becomes.
  • the upper roll has a carrier 22 which is held in the stand 23 of the calender in a rotationally fixed manner and can be loaded by a force 24.
  • the jacket 15 of the top roller 2 is supported on this carrier 22 with the aid of closely adjacent hydrostatic support elements 25.
  • Each support member 25 - or pair of support members 25 - is pressurized by an individual control line 26.
  • the roll shell 15 is formed by a carrier 27 in the form of an inner tube 27 made of lamellar graphite cast, which carries an outer cover 27a made of elastic plastic, which has a higher wear resistance than this cast.
  • a material is preferred that can withstand an average compressive stress of more than 45 N / mm 2 , preferably up to 60 N / mm 2, and has a low marking sensitivity.
  • An example is an epoxy resin reinforced by fibers, in particular carbon fibers, such as the reference material "TopTec 4" already mentioned.
  • the carrier 27 forming the roll shell 15 has a substantially smaller wall thickness than a chilled cast iron shell which has the same inside diameter. Compared to chilled cast iron jackets that have a thickness of 80 to 145 mm, only 45 to 70 mm and a wall thickness of the plastic cover 27a in the range of 8 to 15 mm, preferably 10 mm, are required for lamellar or spheroidal graphite cast iron jackets.
  • channels 28 running near the surface are provided, to which superheated steam at elevated pressure is supplied via control lines 29, for example at a temperature of 220 ° C., which corresponds to a pressure of 22 bar and to a surface temperature of approximately 150 ° C. leads.
  • the stack 101 shows a calender with a stack 101, which consists of eight rollers.
  • the elastic rollers are marked by hatching.
  • the stack 101 therefore includes an upper roller 102 and a lower roller 103 and in between a heatable hard roller 104, an elastic roller 105, a heated hard roller 106, two elastic rollers 109 and 110 and a heated hard roller 111.
  • FIG. 4 is a calender with a stack 201 from illustrates six rollers, namely an upper roller 202 and a lower roller 203 and in between one heatable hard roller 204, two elastic rollers 209 and 210 and a heatable hard roller 211.
  • this smaller number of rollers in the stack is sufficient to produce paper with a high surface quality on both sides. This applies in particular if at least in the lowest working gap with compressive stresses above 42 N / mm 2 , preferably between 45 and 60 N / mm 2 , and on the surfaces of the heated rolls with temperatures above 100 ° C, preferably between 130 and 160 ° C, is worked.
  • the stack 301 has an upper roller 302 and a lower roller 303 and in between a heatable hard roller 304, an elastic one Roller 305 and a heated hard roller 306 on.
  • the stack 301a has the same structure. However the paper web is guided so that it is in the first stack with one side and in the second stack with the other Side rests on the elastic rollers and therefore is satined on both sides.
  • the roll stack 1 of the 12-roll calender of FIG. 1 has five heatable hard rollers 4, 6, 8, 11, 13.
  • Known 12-roll calenders on the other hand, only have four such heated rollers. As a result, it is possible Add 25% more heat energy and therefore the available deformation energy to increase accordingly. The same applies to the other calenders where one more heatable roller each or in the 2-stack calender 5 even two more heated rollers can be used.
  • the desired deformability of the top roller jacket 2 and possibly the lower roller 3 should become one Deformability factor that is at least four times, but is preferably more than five times as large as with a chilled cast iron jacket. This is for example with a lamellar or spheroidal graphite jacket can be reached, which is provided with a plastic cover with a low modulus of elasticity is.
  • each an even number of Reels can also show an odd stack Roll number can be applied when the bottom roll is in usually provided with a hard roll shell is.
  • the illustrated ones Calender with other known means of improvement the paper treatment for example the middle rollers can be mounted on levers, about that with the help of compensation devices the influence of overhanging weights can be compensated can.

Landscapes

  • Paper (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Lubricants (AREA)

Claims (11)

  1. Calandreuse comportant au moins un empilement de cylindres qui présente comme cylindres supérieurs (2 ; 102 ; 202 ;302) et comme cylindres inférieurs (3; 103 ; 203 ; 303) chaque fois un cylindre de compensation de la flexion doté d'une enveloppe de cylindre (15 ;15a) qui s'appuie par l'intermédiaire d'éléments hydrostatiques d'appui (25) sur un support (22) monté de manière à ne pas pourvoir tourner et traversé par les éléments d'appui, et comme cylindres centraux des cylindres rigides (4, 6, 8, 11 ; 13, 104, 106, 111 ; 204, 211 ; 304, 304) et des cylindres élastiques (5, 7, 9, 10, 12 ; 105, 109, 110 ; 209, 210 ; 305), lesquels cylindres forment au moins quatre interstices de travail qui sont délimités par un cylindre rigide et par un cylindre élastique et éventuellement un interstice alterné qui est délimité par deux cylindres élastiques, l'enveloppe de cylindre (15, 15a) du cylindre supérieur (2 ; 102 ; 202, 302) et/ou du cylindre inférieur (3 ; 103 ; 203 ; 303) portent un revêtement (27a) en matière synthétique élastique, et le cylindre central chaque fois voisin (4 ; 104 ; 204 ; 304 ; 13 ; 111 ; 211 ; 306) est un cylindre rigide, caractérisée en ce que l'enveloppe de cylindre (15 ; 15a) est conçue de manière à être déformable avec un facteur de déformabilité :
    Figure 00180001
    où
    E = module E de l'enveloppe du cylindre, en N/mm2 et
    S = épaisseur de paroi de l'enveloppe du cylindre, en mm,
    et dans ce but l'enveloppe du cylindre (15 ; 15a) est réalisée en une fonte à faible module E, comme de la fonte rigide, mais d'une résistance à l'usure insuffisante, et le revêtement (27a) en matière synthétique élastique sert de couche de protection contre l'usure.
  2. Calandreuse selon la revendication 1, caractérisée en ce que le facteur de déformabilité > 5.
  3. Calandreuse selon la revendication 1 ou 2, caractérisée en ce que la matière synthétique présente une résistance à l'usure supérieure à celle du matériau d'enveloppe.
  4. Calandreuse selon la revendication 3, caractérisée en ce que l'enveloppe de cylindre (15; 15a) est réalisée en fonte graphitique lamellaire.
  5. Calandreuse selon l'une des revendications 1 à 4, caractérisée en ce que l'enveloppe de cylindre (15) est réalisée en fonte graphitique sphéroïdale et porte un revêtement (27a) en matière synthétique élastique.
  6. Calandreuse selon l'une des revendications 1 à 5, caractérisée en ce que la matière synthétique est une résine époxy renforcée de fibres.
  7. Calandreuse selon l'une des revendications 1 à 6, caractérisée en ce que le cylindre de compensation de la flexion présente une commande à quatre zones dans laquelle un liquide sous pression peut être apporté sous différentes pressions aux éléments de soutien (25), individuellement ou par paire.
  8. Calandreuse selon l'une des revendications 1 à 7, caractérisée en ce qu'au moins le cylindre central supérieur (4) peut être chauffé.
  9. Calandreuse selon l'une des revendications 1 à 8, caractérisée en ce que tous les cylindres centraux rigides (4, 6, 8, 11, 13) peuvent être chauffés.
  10. Calandreuse selon la revendication 8 ou 9, caractérisée en ce que le chauffage s'effectue au moyen de vapeur d'eau qui est amenée sous une surpression.
  11. Calandreuse selon l'une des revendications 1 à 10, caractérisée en ce que dans un empilement (1) de 12 cylindres, le 4ème cylindre (11) est entraíné par le bas.
EP96108397A 1995-06-13 1996-05-28 Calendre Expired - Lifetime EP0748895B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19521402 1995-06-13
DE19521402A DE19521402C2 (de) 1995-06-13 1995-06-13 Kalander für die Behandlung einer Papierbahn

Publications (3)

Publication Number Publication Date
EP0748895A2 EP0748895A2 (fr) 1996-12-18
EP0748895A3 EP0748895A3 (fr) 1998-05-13
EP0748895B1 true EP0748895B1 (fr) 2001-05-02

Family

ID=7764221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108397A Expired - Lifetime EP0748895B1 (fr) 1995-06-13 1996-05-28 Calendre

Country Status (8)

Country Link
US (1) US5755156A (fr)
EP (1) EP0748895B1 (fr)
JP (1) JP2665215B2 (fr)
KR (1) KR0170075B1 (fr)
AT (1) ATE200920T1 (fr)
CA (1) CA2176778C (fr)
DE (2) DE19521402C2 (fr)
EA (1) EA000188B1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19633671C2 (de) † 1996-08-21 1999-03-11 Voith Sulzer Finishing Gmbh Kalander
DE19758443A1 (de) † 1997-03-14 1998-09-24 Voith Sulzer Finishing Gmbh Glättwerk
DE19811474A1 (de) * 1998-03-17 1999-09-23 Kuesters Eduard Maschf Kalanderanordnung
DE19813640A1 (de) 1998-03-27 1999-09-30 Voith Sulzer Papiertech Patent Kalander, insbesondere zur Behandlung einer Papierbahn
DE19828722C2 (de) * 1998-06-29 2001-06-21 Schwaebische Huettenwerke Gmbh Walzengruppe
DE19832064C2 (de) * 1998-07-16 2000-09-07 Voith Sulzer Papiertech Patent Kalander für Bahnen aus Papier oder ähnlichem Material
DE19832067B4 (de) * 1998-07-16 2005-04-21 Voith Paper Patent Gmbh Kalander für Bahnen aus Papier oder ähnlichem Material
DE10164344C1 (de) * 2001-12-28 2003-06-18 Schwaebische Huettenwerke Gmbh Formstabilisierter Walzenkörper
JP2007056409A (ja) * 2005-08-25 2007-03-08 Nippon Paper Industries Co Ltd スーパーカレンダー

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2300994A (en) * 1938-08-09 1942-11-03 Cons Water Power & Paper Co Calender for paper
DE1193792B (de) * 1961-06-30 1965-05-26 Textilmaschinen Eduard Kuester Walze fuer die Druckbehandlung von Warenbahnen
JPS49339B1 (fr) * 1964-09-22 1974-01-07
AT369063B (de) * 1979-05-10 1982-12-10 Escher Wyss Ag Walzvorrichtung zum walzen von bahnfoermigen materialien
DE3020669C2 (de) * 1980-05-30 1984-02-16 Küsters, Eduard, 4150 Krefeld Verfahren zur Steuerung der Liniendruckverteilung in einem Kalander sowie ensprechender Kalander
DE3131799C2 (de) * 1981-08-12 1984-08-30 Kleinewefers Gmbh, 4150 Krefeld Walzenpresse für Papier- und ähnliche Bahnen, insbesondere Kalander
DE3201635C2 (de) * 1982-01-20 1984-02-16 Küsters, Eduard, 4150 Krefeld Kalanderanordnung
DE3767476D1 (de) * 1987-05-09 1991-02-21 Kleinewefers Gmbh Verfahren zum betrieb einer walzenmaschine und steueranordnung zur durchfuehrung dieses verfahrens.
DE3735438C1 (de) * 1987-10-20 1989-05-18 Kleinewefers Gmbh Verfahren zum Betrieb eines Kalanders und Kalander zur Durchfuehrung dieses Verfahrens
FI82102C (fi) * 1987-12-11 1994-01-26 Valmet Paper Machinery Inc Valssystem i superkalander. valssystem i superkalander
FI88420B (fi) * 1991-03-20 1993-01-29 Valmet Paper Machinery Inc Foerfarande foer framstaellning av en vals och en vals
CH682893A5 (de) * 1991-05-03 1993-12-15 Escher Wyss Ag Walze und Kunststoffolien-Giessanlage mit einer Walze.
DE9314568U1 (de) * 1993-09-27 1995-02-02 Eduard Küsters Maschinenfabrik GmbH & Co KG, 47805 Krefeld Walze
FI96334C (fi) * 1993-11-24 1996-06-10 Valmet Paper Machinery Inc Menetelmä paperin tai vastaavan rainamateriaalin kalanteroinnissa ja menetelmää soveltava kalanteri

Also Published As

Publication number Publication date
DE19521402C1 (de) 1996-07-04
DE19521402C2 (de) 2002-02-07
CA2176778C (fr) 1999-09-14
CA2176778A1 (fr) 1996-12-14
KR970001734A (ko) 1997-01-24
EA199600030A3 (ru) 1997-03-31
JPH093791A (ja) 1997-01-07
EP0748895A2 (fr) 1996-12-18
JP2665215B2 (ja) 1997-10-22
EP0748895A3 (fr) 1998-05-13
EA199600030A2 (ru) 1996-12-30
EA000188B1 (ru) 1998-12-24
US5755156A (en) 1998-05-26
KR0170075B1 (ko) 1999-03-30
DE59606842D1 (de) 2001-06-07
ATE200920T1 (de) 2001-05-15

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