EP0886695A1 - Calender - Google Patents
CalenderInfo
- Publication number
- EP0886695A1 EP0886695A1 EP97951247A EP97951247A EP0886695A1 EP 0886695 A1 EP0886695 A1 EP 0886695A1 EP 97951247 A EP97951247 A EP 97951247A EP 97951247 A EP97951247 A EP 97951247A EP 0886695 A1 EP0886695 A1 EP 0886695A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- calender
- rolls
- web
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/0006—Driving arrangements
Definitions
- the invention relates to a calender for treating a web, in particular a paper web, for example a calendering calender.
- a calender which has the features mentioned in the preamble of claim 1, is known for example from DE-U-295 04 034.
- a middle roller is usually driven in the roller stack and takes the other rollers with it by means of friction on the material web.
- the normally entrained rollers are driven for the introduction of the web into the roll nips.
- This auxiliary drive only needs to be designed for the idle power until the working speed is reached, while the main drive is to be designed for the total power during operation.
- the compressive stress is limited by the minimum diameter of the rollers to a corresponding value, which can only be increased by increasing the line load. But even if the horizontal deformation of the rollers is limited, shear stresses act on the web in the roller gap, which - in the case of paper - can loosen the bond between the fibers in the direction of web travel and thereby reduce its strength.
- the object of the invention is to provide a calender with the features mentioned in the preamble of claim 1, in which the compressive stress can be increased for a given line load by reducing the roll diameter.
- the rollers can be designed with diameters that are determined by criteria other than the deformation resistance or the horizontal deformations, such as the critical natural frequencies.
- Rollers with a smaller diameter have a lower weight, so that the static (gravitational) forces are relatively lower and smaller bearings can also be used.
- the drives deliver the specific power for each driven roller, which is made up of forming, transport and power loss.
- a distribution of 50:50 over the two gap-forming rollers would only be a rough guide, since, for example, a deflection adjustment roller has significantly higher friction losses than a normal solid roller.
- the forces to be controlled according to the invention can be measured, for example, in the roller bearings; Bearings with built-in force measuring systems are commercially available. However, it is at least also conceivable to measure the horizontal deformations caused by such forces.
- FIG. 1 is a largely schematic side view of a calender according to the invention
- Fig. 3 shows a modification of the second embodiment
- Figure 4 is a block diagram of the control of one of the rollers.
- a calender frame 10 with side stands is made in a welded or cast construction.
- a calender 12 is arranged in the frame 10 and has eight nip-forming rollers.
- the top and bottom rollers 14 and 16 are deflection adjustment rollers, respectively, and the yoke of the top deflection adjustment roller is fixed in place in the frame; the bearings of this roller are also stationary.
- the roller 14 is provided with an elastic cover, just like that in Ka lander 12 provided rollers 18, 20, 22 and lower deflection adjustment roller 16. Between the rollers 14 and 18, a hard heatable roller 24 is arranged, each forming a roll gap with the rollers 14 and 18 arranged above and below it.
- rollers 18 and 20 there is a hard, heatable roller 26, each defining a nip with them.
- the gap between the rollers 20 and 22, which is traversed by the web 28, is not used for forming the web, but rather as a turning nip around the previously the elastic rollers facing side of the web now to face the hard, heatable roller 30 which is arranged between the rollers 22 and 16. (The side of the web in question has already passed through four gaps, albeit with an elastic roller in each case, but has nevertheless been smoothed so far that passing through two further gaps on the heated side is sufficient).
- the bearings of all the rollers are arranged in the frame 10 such that they can slide.
- the load on the roll gaps is carried out by means of hydraulic cylinders 32 and results, for example, in an average line force of 500 N / mm. It should be noted that the line force can also be applied by means of the deflection adjustment rollers.
- the hard rollers can be heated up to 200 ° C with steam, for example.
- the elastic warts can be tempered.
- the web 28 is guided between the individual nips around guide rollers 34, the surfaces of which are provided with spiral grooves in order to ensure the width of the web and to prevent the formation of an air cushion on which the web could float.
- Pneumatic compensation of the overhanging loads is carried out by means of compensation units 46, in their place hydraulic or other servo drives can also be provided.
- the calender arrangement shown can be arranged downstream of a paper or coating machine as an "in-line calender” or can operate as an "off-line calender”.
- each nip-forming roller is provided with its own drive, consisting of an electric motor, for example a DC motor, which is coupled to the roller assigned to it via a cardan shaft and is fed from a regulated supply unit.
- the drives are only indicated in Fig. 1 by the usual two-quarter circle symbol.
- Fig. 4 shows the drive of one of the rollers.
- the drive motor is a DC motor 50, fed from a converter 52 via a controller 54, preferably a digital PID controller.
- each motor 50 has an actual value transmitter in the form of, for example, a tachodynamo 56; the target values can be stored in an electronic memory 58 which is read out sequentially.
- the setpoints are selected so that the rolls defining a roll gap each have the same peripheral speed.
- the peripheral speed is only a suitable parameter with restrictions, since the elastic rollers deform in the area of the roll gap, so there is no longer a strict proportionality between the speed and peripheral speed. The same applies to the dilation that occurs when a roller is heated.
- the power control has the peculiarity that when the power is metered to the motors, each of which drives a pair of rolls that delimit a roll gap, the power of both motors is adjusted in the event of a setpoint deviation, and since all the rolls are linked to one another, this means a control intervention on all of them Engines. Accordingly, an overall controller 60 is hierarchically superordinate to the single motor controller, which in the event of a setpoint deviation also calculates new setpoints of the power for all rolls for only one roll or takes them from a search table memory.
- Force sensors are arranged in the bearings of the rollers, which at least detect the forces transmitted in the horizontal direction from the roller in question to the frame 10.
- Such "force measuring bearings” are offered, for example, by SKF Kugellagerfabriken GmbH, Schweinfurt.
- the power or, more precisely, the power distribution is regulated so that these horizontal forces are kept as small as possible.
- the calender arrangement according to FIG. 1 can be operated in such a way that the number of nips passed through is specified; the operator can also influence the technological result by selecting the line load and the roller temperatures.
- each individual calender has only two deflection adjustment rollers 40 and 42 with elastic cover and a hard, heated roller 44 arranged between them.
- FIG. 3 shows an example of the second variant of the invention, derived from the embodiment according to FIG. 2.
- the hard, heated middle roller 45 does not have its own drive, but is taken along by the shells of the deflection adjustment rollers 40, 42. Although these transmit the drive torques to the hard roller 46 through the web, the drives of the two elastic rollers are regulated in such a way that the forces acting on the hard roller are equal and countervailing be set.
Landscapes
- Paper (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Treatment Of Fiber Materials (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19650576A DE19650576C2 (en) | 1996-12-06 | 1996-12-06 | calender |
DE19650576 | 1996-12-06 | ||
PCT/EP1997/006474 WO1998024969A1 (en) | 1996-12-06 | 1997-11-20 | Calender |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0886695A1 true EP0886695A1 (en) | 1998-12-30 |
EP0886695B1 EP0886695B1 (en) | 2002-05-22 |
Family
ID=7813783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97951247A Expired - Lifetime EP0886695B1 (en) | 1996-12-06 | 1997-11-20 | Calender |
Country Status (9)
Country | Link |
---|---|
US (3) | US6095039A (en) |
EP (1) | EP0886695B1 (en) |
JP (1) | JP4255516B2 (en) |
AT (1) | ATE217927T1 (en) |
BR (1) | BR9707370A (en) |
CA (1) | CA2252414C (en) |
DE (2) | DE19650576C2 (en) |
ES (1) | ES2178028T3 (en) |
WO (1) | WO1998024969A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19650576C2 (en) * | 1996-12-06 | 2001-02-15 | Kuesters Eduard Maschf | calender |
DE19723519A1 (en) * | 1997-06-05 | 1998-12-10 | Kuesters Eduard Maschf | calender |
DE19803323C2 (en) | 1998-01-29 | 2003-06-05 | Voith Paper Patent Gmbh | Process for influencing a web material, such as paper, and calender for carrying out the process |
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 |
DE19811474A1 (en) * | 1998-03-17 | 1999-09-23 | Kuesters Eduard Maschf | Vertical arrangement of glazing rollers employed in paper manufacture |
DE19815339A1 (en) * | 1998-04-06 | 1999-10-14 | Voith Sulzer Papiermasch Gmbh | Rolling machine and method for its operation |
DE19940664C1 (en) * | 1999-08-27 | 2001-02-08 | Voith Paper Patent Gmbh | Calibration of calender rollers, for processing paper or cardboard gives a pilot setting and adjusts the pressure at the lower roller support, with support pressures registered when the upper roller nip is fully closed |
FI20001362A0 (en) * | 2000-06-07 | 2000-06-07 | Valmet Corp | Method for profiling a paper web |
DE10204770B4 (en) † | 2002-02-05 | 2005-03-31 | Eduard Küsters Maschinenfabrik GmbH & Co. KG | Method for actively damping vibrations in a device for processing a moving web, device suitable for carrying out this method and roller suitable for use in this device |
JP2007056409A (en) * | 2005-08-25 | 2007-03-08 | Nippon Paper Industries Co Ltd | Super calender |
US20060102019A1 (en) * | 2005-09-23 | 2006-05-18 | Pasi Kakkonen | Method and arrangement for calendering a web |
DE102006056695A1 (en) * | 2006-11-29 | 2008-06-05 | Andritz Küsters Gmbh | Calender for the treatment of a web |
EP2278067B1 (en) * | 2009-06-30 | 2011-11-23 | Andritz Küsters GmbH | Calender for treating a material web |
ATE541987T1 (en) | 2009-06-30 | 2012-02-15 | Andritz Kuesters Gmbh | CALENDAR FOR SMOOTHING A PAPER WEB |
DE102011052229A1 (en) | 2011-07-28 | 2013-01-31 | Andritz Küsters Gmbh | calender |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1793114A (en) * | 1929-03-27 | 1931-02-17 | Minton Vacuum Dryer Corp | Slip-control calender |
US3044392A (en) * | 1959-07-10 | 1962-07-17 | Kimberly Clark Co | Papermaking machine |
US3172313A (en) * | 1961-03-21 | 1965-03-09 | Thomas A Fox | Strip rolling apparatus |
FI62874C (en) * | 1979-10-15 | 1983-03-10 | Valmet Oy | PAPER CALENDAR |
DE3007452C2 (en) | 1980-02-28 | 1984-09-20 | Kleinewefers Gmbh, 4150 Krefeld | Process for regulating the pressure exerted in a calender and calender for carrying out this process |
JPS5891890A (en) * | 1981-11-24 | 1983-05-31 | 神崎製紙株式会社 | Super calender |
DE3713561A1 (en) * | 1987-04-23 | 1988-11-10 | Escher Wyss Gmbh | CALENDAR WITH NIPRELIEVING |
JPH04185790A (en) * | 1990-11-10 | 1992-07-02 | Taiyo Yuden Co Ltd | Method and device for calendering |
DE9207852U1 (en) * | 1992-06-11 | 1992-08-27 | Kleinewefers Gmbh, 4150 Krefeld, De | |
DE29504034U1 (en) * | 1995-03-09 | 1995-05-04 | Voith Sulzer Finishing Gmbh | Calender for the two-sided treatment of a paper web |
DE19519011C2 (en) * | 1995-05-24 | 2001-02-01 | Voith Sulzer Finishing Gmbh | calender |
DE29518424U1 (en) * | 1995-11-21 | 1996-03-14 | Voith Sulzer Finishing Gmbh | Calender in a paper or coating machine |
US20040134361A1 (en) | 1996-12-06 | 2004-07-15 | Eduard Kusters Maschinenfabrik Gmbh & Co. Kg | Calender |
US7357072B2 (en) | 1996-12-06 | 2008-04-15 | Eduard Kusters Maschinefabrik Gmbh & Co. Kg | Calender |
DE19650576C2 (en) | 1996-12-06 | 2001-02-15 | Kuesters Eduard Maschf | calender |
DE19729531C2 (en) * | 1997-07-10 | 2002-12-12 | Voith Paper Patent Gmbh | Paper calender |
-
1996
- 1996-12-06 DE DE19650576A patent/DE19650576C2/en not_active Expired - Fee Related
-
1997
- 1997-11-20 US US09/117,753 patent/US6095039A/en not_active Expired - Lifetime
- 1997-11-20 ES ES97951247T patent/ES2178028T3/en not_active Expired - Lifetime
- 1997-11-20 JP JP52512898A patent/JP4255516B2/en not_active Expired - Fee Related
- 1997-11-20 BR BR9707370-9A patent/BR9707370A/en not_active IP Right Cessation
- 1997-11-20 AT AT97951247T patent/ATE217927T1/en active
- 1997-11-20 CA CA002252414A patent/CA2252414C/en not_active Expired - Fee Related
- 1997-11-20 EP EP97951247A patent/EP0886695B1/en not_active Expired - Lifetime
- 1997-11-20 WO PCT/EP1997/006474 patent/WO1998024969A1/en active IP Right Grant
- 1997-11-20 DE DE59707328T patent/DE59707328D1/en not_active Expired - Lifetime
-
2000
- 2000-06-27 US US09/604,837 patent/US6666135B1/en not_active Expired - Fee Related
-
2008
- 2008-02-28 US US12/039,468 patent/US7918159B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9824969A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19650576A1 (en) | 1998-06-10 |
DE19650576C2 (en) | 2001-02-15 |
WO1998024969A1 (en) | 1998-06-11 |
CA2252414A1 (en) | 1998-06-11 |
US6666135B1 (en) | 2003-12-23 |
ATE217927T1 (en) | 2002-06-15 |
DE59707328D1 (en) | 2002-06-27 |
US20080210105A1 (en) | 2008-09-04 |
EP0886695B1 (en) | 2002-05-22 |
ES2178028T3 (en) | 2002-12-16 |
US6095039A (en) | 2000-08-01 |
US7918159B2 (en) | 2011-04-05 |
JP4255516B2 (en) | 2009-04-15 |
BR9707370A (en) | 2000-01-04 |
JP2000504381A (en) | 2000-04-11 |
CA2252414C (en) | 2007-04-03 |
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