EP1883732A1 - Calendar - Google Patents
CalendarInfo
- Publication number
- EP1883732A1 EP1883732A1 EP05815437A EP05815437A EP1883732A1 EP 1883732 A1 EP1883732 A1 EP 1883732A1 EP 05815437 A EP05815437 A EP 05815437A EP 05815437 A EP05815437 A EP 05815437A EP 1883732 A1 EP1883732 A1 EP 1883732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- calender according
- lever
- stand
- 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
- 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
- D21G1/002—Opening or closing mechanisms; Regulating the pressure
Definitions
- the invention relates to a calender for the treatment of a web, in particular a paper web, according to the preamble of claim 1.
- a calender is known with a stand inclined obliquely to the horizontal in the longitudinal direction, on which a roll stack with a likewise inclined stacking plane is arranged.
- the roll stack has end rolls and a plurality of intermediate rolls which are arranged on the underside of the stand.
- the lower and upper rollers are fixable by hydraulic tensioning devices on the stand.
- the center rollers are carried by levers which are pivotable about pivot points in the stand and can cooperate with a stop which fixes their position when lowering the rollers.
- the levers are approximately transversely to the stack level.
- a calender with a stack of rolls which has at least four rolls whose axes lie in a stack plane inclined to the horizontal, at least the intermediate rolls located between the end rolls being mounted on levers where force transmitters act.
- the roll stack is located on an upper side of the stand.
- the inclination of the roll stack has, inter alia, the advantage that the weight of the center rolls is relieved to about 30%.
- the levers are approximately perpendicular to the stack level. They are pivotable by a limited angle, which allows a roller separation and the use of a roller through a roller of other diameters.
- the force generators are piston-cylinder units, which form an effective attenuator during the roller separation.
- the levers are double-armed and can be pivoted to an approximately vertical position, in order to be able to compensate for the middle roll weight and virtually completely compensate it.
- a roller separation is possible here only by approaching certain angular positions of the lever. The requirements for a rapid quick separation can therefore not be met.
- EP 1 026 316 B1 discloses a calender for web-shaped materials, such as paper, comprising a stand and a roll stack comprising a bottom roll, a top roll and at least one center roll arranged therebetween.
- the stack level of the roll stack is inclined to the horizontal.
- the displacement is done by hydraulic cylinders to control the transverse movement in a simple manner.
- the disadvantage is the requirement for additional control.
- the transverse movement can also lead to undesirable roller contacts in web breaks.
- the object of the invention is therefore to provide a calender according to the preamble of claim 1, which provides very good smoothness results while allowing a quick quick release to open the roll stack.
- a calender which uses the gravity effect of the roll weights for roller separation and thereby enables rapid roll separation.
- the known compensation possibilities of the self-weight forces for setting a line load characteristic can be used.
- the calender is also vibration resistant and allows easy roll change.
- the roll stack may comprise a selectable number of center rolls, the levers carrying the center rolls preferably being suspended vertically.
- the at least one center roller is suspended vertically in an open and closed roll stack in a support lever.
- the center roll is freed of its own weight component and the force component of the overhanging weights that would otherwise act in the nip, by their perfect compensation. This allows an exact initiation and adjustment of the line loads or compressive stresses in the nip. This also gives the precise control of the calendering results.
- the center roll or the center rolls are individually lowered under the influence of their own weight forces, preferably only in the vertical direction.
- the lever carrying a center roller is then loaded only by tensile forces and is always in a statically determined, balanced, ie stable position.
- the roll stack is thereby constructed vibration-damping.
- the at least one center roll is vertically suspended with a stack of rolls in a support lever, with spacing of the roll body of the center roll to the adjacent rolls.
- the lever of the at least one center roll is slightly swung from the vertical position. If there are several intermediate rolls, this swinging out is stepped. In the quick release process, the lever or levers are relieved and return to their vertical position. As a result, the rollers are separated as quickly as possible and can be supported on damping power cylinders.
- FIG. 1 shows schematically a side view of a first embodiment of a calender with closed roll stack
- FIG. 2 schematically shows a side view of the calender according to FIG. 1 with the roll stack open
- FIG. 3 schematically shows a side view of a second embodiment of a calender with open roll stack
- Fig. 4 shows schematically a side view of the calender according to FIG. 3 with closed roll stack.
- Figures 1 and 2 show a calender 1 for the treatment of a web, in particular a paper, cardboard or textile web, with at least one adjustable between an open and a closed position roll stack 2 from each of an upper end roll 3 and a lower end roll 4 and at least one intermediate roller 5, 6, 7, 8, which are arranged together in a plane inclined to the horizontal stacking plane S on a bottom 9 of a stand 10.
- the at least one intermediate roller 5, 6, 7, 8 is mounted on a lever 10, 12, 13, 14 held on the stand 10.
- the at least one intermediate roller 5, 6, 7, 8 In the open position of the roll stack 2, which is shown in Fig. 2, the at least one intermediate roller 5, 6, 7, 8 as a on the associated lever 11, 12, 13, 14 suspended weight body hanging down freely on the stand 10th held.
- the at least one intermediate roller 5, 6, 7, 8 is preferably supported by a vertically suspended lever 11, 12, 13, 14.
- a plurality of intermediate rollers 5, 6, 7, 8 are provided with associated levers 11, 12, 13, 14, wherein the number of intermediate rollers is selectable.
- four intermediate rollers 5, 6, 7, 8 are provided.
- the roll stack 2 is thus a 6-roll stack, which can be provided for a two-sided treatment of a web.
- the roll stack 2 preferably comprises hard and soft rolls for forming soft nips.
- two adjacent intermediate rolls 6, 7 can furthermore be formed as soft rolls.
- the illustrated calender has a stand 10 which extends at an angle of about 45 ° to a horizontal footprint H. At the head end, the stand 10 is connected to a shelf support 16 via a longitudinal member 15.
- the roll stack 2 hangs on the underside 9 of the stand 10, with a stacking plane S in the closed position of the roll stack 2, as shown in Figure 1, which also extends at an angle of about 45 ° to the horizontal footprint H.
- the stack level may have a pitch in the range of 40 to 50 degrees.
- the upper end roller 3 and the lower end roller 4 are mounted in brackets 17, 18, in particular linear guides, which can be fastened to the stand 10, preferably optionally slidable. From at least one end of the roll stack 2 can be loaded, including a hydraulic cylinder 19 is provided, which acts here on the holder 18 of the lower end roll 4 and the holder 18 together with the lower end roll 4 in the stacking plane S shifts.
- the upper and lower end rollers 3, 4 are also preferably bending adjusting rollers.
- the center rollers 5, 6, 7, 8 are mounted with their bearings on the associated levers 11, 12, 13, 14, about pivot axes 20, 21, 22, 23 on the stand 10 directly or to associated brackets 24, 25, 26, 27th , which are fastened to the stand 10, as shown in Figure 2, are pivotable.
- the intermediate rollers 5, 6, 7, 8 are held on the associated lever 11, 12, 13, 14 hanging down, to which the levers 11, 12, 13, 14 are formed with one arm or two arms.
- the levers 11, 12, 13, 14 are formed with two arms to hang the levers 11, 12, 13, 14 via pivot axes 20, 21, 22, 23 to the brackets 24, 25, 26, 27.
- the swing arch can then be made tight.
- the levers 11, 12, 13, 14 are held at a plurality of intermediate rollers 5, 6, 7, 8 spaced from each other on the stand 10, that in the closed position of the roller stack 2 all intermediate rollers hang freely down and are preferably supported vertically suspended.
- the intermediate rollers 5, 6, 7, 8 suspended from the levers 11, 12, 13, 14 are fastened to each other in a positionable manner on the stand 10, so that for each roller diameter of an intermediate roller 5, 6, 7 , 8 for the freely downwardly suspended intermediate rollers closing the roll stack is adjustable
- the levers 11, 12, 13, 14 can be loaded by force transmitters in the form of piston-cylinder units 28, 29, 30, 31. In the two-armed design of the levers 11, 12, 13, 14 provided here, the force transmitters 28, 29, 30, 31 engage opposite ends at the end carrying the weight body of the intermediate roll.
- levers 11, 12, 13, 14 can be extended, for which purpose cylinder units can be provided.
- an extensibility is provided when more than one intermediate roll 5, 6, 7, 8 are provided. If the levers 11, 12, 13, 14 of the intermediate rolls 5, 6, 7, 8 selected to be different lengths, then the roll stack is separated by offset downwardly hanging center rolls 5, 6, 7, 8, when the end rolls 3, 4 after be moved outside. The directions of movement are indicated by arrows.
- the rolls 3 to 8 constituting the roll stack 2 can have all different roll diameters.
- the roll diameters of the intermediate rolls 5, 6, 7, 8 are preferably smaller than the roll diameters of the end rolls 3, 4. In the case of several intermediate rolls 5, 6, 7, 8, all intermediate rolls may also have the same roll diameters.
- All rolls 3, 4, 5, 6, 7, 8 are furthermore preferably provided with their own power drive 32, 33, 34, 35, 36, 37.
- the intermediate rolls 6, 7 may be formed as soft rolls to form an exchange gap.
- a roll stack with an interchangeable gap it is also possible to provide two roll stacks with a selectable number of rolls for two-sided treatment of a paper web. Preference is given to roll stacks of three to five rolls each and soft nips. To guide a web between the nips of the roll stack 2 known outside guiding means can be used.
- the second embodiment shown in Figures 3 and 4 differs from the embodiment described in Figures 1 and 2 in that the suspended intermediate rollers 5, 6, 7, 8 are positioned in a vertically suspended state at a distance from each other. The distance may be selectable for determining a nip opening width.
- the intermediate rollers 5, 6, 7, 8 preferably hang on levers 51, 52, 53, 54, which are in one arm and are articulated with swivel axles 20, 21, 22, 23 provided in the upright 10. Under the weight of the weight body of the intermediate rolls 5, 6, 7, 8, the levers 51, 52, 53, 54 hang freely with the intermediate rollers 5, 6, 7, 8 as a head load down.
- each lever 51, 52, 53, 54 engages a force transmitter 28, 29, 30, 31, via which each lever 51, 52, 53, 54 is pivotable about the intermediate rollers 5, 6, 7, 8 against each other pivot, that the roll stack 2 is closed in the stacking plane S, as shown in Figure 4. Arrows illustrate the directions of movement.
- Stops 55, 56, 57 may be provided to prevent oscillation of the swung-intermediate rolls 6, 7, 8 when opening the roll stack 2.
Landscapes
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510016781 DE102005016781B3 (en) | 2005-04-12 | 2005-04-12 | Calender, for finishing a paper web, has an angled roller stack on a column with intermediate rollers on levers suspended freely from the column as weights when in the open setting |
PCT/EP2005/012923 WO2006108450A1 (en) | 2005-04-12 | 2005-12-02 | Calendar |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1883732A1 true EP1883732A1 (en) | 2008-02-06 |
EP1883732B1 EP1883732B1 (en) | 2009-07-15 |
Family
ID=35677480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05815437A Expired - Fee Related EP1883732B1 (en) | 2005-04-12 | 2005-12-02 | Calender |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1883732B1 (en) |
DE (2) | DE102005016781B3 (en) |
WO (1) | WO2006108450A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007012493A1 (en) * | 2007-03-15 | 2008-09-18 | Voith Patent Gmbh | Press arrangement |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29521610U1 (en) * | 1995-03-09 | 1997-11-20 | Voith Sulzer Finishing Gmbh | Calender for the treatment of a paper web |
DE19904451B4 (en) * | 1999-02-04 | 2005-06-30 | Voith Paper Patent Gmbh | Calender for sheet-like materials such as paper |
DE10000543A1 (en) * | 2000-01-08 | 2001-07-19 | Voith Paper Patent Gmbh | calender |
DE10041651A1 (en) * | 2000-08-24 | 2002-03-14 | Voith Paper Patent Gmbh | calender |
-
2005
- 2005-04-12 DE DE200510016781 patent/DE102005016781B3/en not_active Expired - Fee Related
- 2005-12-02 WO PCT/EP2005/012923 patent/WO2006108450A1/en not_active Application Discontinuation
- 2005-12-02 EP EP05815437A patent/EP1883732B1/en not_active Expired - Fee Related
- 2005-12-02 DE DE502005007729T patent/DE502005007729D1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006108450A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2006108450A1 (en) | 2006-10-19 |
DE102005016781B3 (en) | 2006-03-30 |
DE502005007729D1 (en) | 2009-08-27 |
EP1883732B1 (en) | 2009-07-15 |
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