FI119154B - Multicolor calendars and procedure in a multiple-choice calendar - Google Patents

Description

119154

Multi Roll Calender and Method in Multi Roll Calender

ENGINEERING

5

The invention relates to a multi-roll calender according to the preamble of claim 1.

The invention also relates to a method according to the preamble of claim 12.

BACKGROUND OF THE INVENTION

Calendering generally aims to improve the properties of the web material such as paper or board, such as smoothness, glossiness and oil absorbency. In calendering, the web is guided into a nip formed between rolls to be pressed against each other, i.e., a calendering nip, in which the web is deformed by the temperature, performance, and nip pressure. In the calendar, the nipples consist of a · · · • · ·, a smooth-surface press roll, such as a metal roll, and a flexible coating on the • • ·). 20 rolls, such as a polymer roll. The flexible surface roll adapts the web · · • * ... the surface thereof and to press the web uniformly against the opposing flat surface of a speech • • · · · · ·. . ·. press roll. In this context, calender rolls refer to the shape of the calendering nip • · · ···. ···. The lower roller refers to the top roll of the roll stack, the lower roller refers to the lowest roll of the roll stack and the intermediate rolls mean the 25 rolls between the upper roller and the lower roller. Upper nipple means the highest calender nip formed between the upper roll • · · * "; and the lower calender roll below the upper roll; and calendering nipples formed by • ite ···.

· »· * ::: 30 • • ··« 2 119154

Typically, compression is achieved in a multi-roll calender by securing the top or bottom roll of the roll stack and squeezing the stack of rolls against the fixed roll. Alternatively, both the upper and lower rollers are pressed against each other either so that none of the intermediate rolls are locked in place or at least one of the intermediate rolls is locked in place. The deflections of the rolls can generally be compensated by deflection compensating devices on the upper and lower rollers so that the roll nipples take a straight line shape.

FI patent application 20041260 discloses a multi-roll calender with at least one single roll stack consisting of a top roll, a lower roll and at least one intermediate roll between them supported on a calendar frame. The roll stack comprises at least two calendering nips, of which at least one is a fiber web being calendered. A subframe is attached to the Kalan blade with a soft surface subframe upper roller and a soft surface subframe lower roller to form a matte nip to allow 15 matt driving modes. The auxiliary body may be fixedly attached or by a lever mechanism or a guide mechanism to the calender body. A snack is provided between the rollers attached to the subframe to prevent nip contact in the mattiip when other types of calender are separated. At least one loading cylinder is provided in connection with the subframe to provide loading to the matt nipples and / or other nipples of the roll stack. The roll stack can be divided by a subframe with a · ·· | ^ index to roll stack without changing calender rolls.

U.S. Patent No. 6,248,215 discloses a calender with a roll stack comprising an upper roll, a lower roll and a plurality of intermediate rolls. The lower roller is a deflection compensated roll that can: ·. 25 dan lifts with the cylinder device. The upper roller is also a deflection compensated roller with a "" *. ***. Either a fixed jacket or a movable jacket. The intermediate roller above the lower roller is supported on the ··· calender body by a pivot so that said intermediate roller can be locked in its lower position. The intermediate roller below the upper roller is also supported on the calender body with a swivel arm so that said intermediate roller can be loaded against the upper roller by a cylindrical device attached to the upper roller. • · · Locking the lower roller intermediate roller • ♦ ·: a calender nip is formed between the lower roll and said intermediate roll by means of a lower roller cylinder device. a device 5 for locking it in its up position, whereby the upper roll is a movable jacket roll, wherein the loading of the nip between the upper roll and said intermediate roll is achieved by the movable jacket upper roll.

DE-A-196 31 056 discloses a calender with a roll stack 10 comprising a top roll, a lower roll and a plurality of intermediate rolls. Above the upper roller or below the lower roller, an additional movable roller is provided, wherein the upper roller or the lower roller respectively is provided with two opposing rows of load shoes. Hereby, one separate calender nip for the web can be tracked on the web between the upper roll and the roll above it or on the lower roll and the roll below. The calender 15 can then be used normally, with the web passing through all the calendering nipples or using only one of the separate calendering nips where the web can be calendered. The problem with the known arrangement is, however, that when the fiber web is changed, it is necessary to take a new route, which slows down the changeover. Also, this known arrangement does not allow the use of multiple a 20 nips for matte grades.

a. a a a a a a a a a a ***. 'WO 2004/061222 discloses a calender with overlapping or overlapping stacked roll stacks. Each roll stack comprises a top roll, a lower roll, and a plurality of intermediate rolls.

a a

The top intermediate roll, which is a thermal roll, can be locked to the body, whereby a separate nip can be formed between the top roll and the top intermediate roll. When the top intermediate roll is locked * *, · · ·. The closing and loading of the upper nip between the frame, the upper roller and the upper intermediate roller are carried out by moving the upper roller jacket inside the roller. When the top intermediate roller is free, the top second roller is closed by moving the lower roller and / or the lower roller jacket. The document also discloses a locking of the lower intermediate roll to the body in a corresponding manner, whereby a separate nip can be formed between the lower roll 30 and the lower intermediate roll. The publication has a a a a a *! Also shown is a load control arrangement to be mounted between the bearing housings of two overlapping rollers or the 4119154 support arms. Adjustment alignment can be used to limit the line load of the nip between the pairs of pairs or to force the nip completely open.

5 The prior art solutions do not provide a simple way of converting a calender with a single roll stack into a calendar with two overlapping rolls.

Another problem with prior art calenders arises in the case of using moving diaphragm TK rollers to close and load the roll stack. In this case, the limited movement of the moving diaphragm TK rolls, e.g., ± 15 mm relative to the roll center, becomes a problem. When the outer diameters of the roll diapers change as the grinding or coating type changes to such an extent that the stroke of the movable diaphragm roll is not sufficient to close the nipples, snacks mounted between the roll mounting brackets and the body are known. For certain roll diameters, the diameter of the roll to be replaced changes so much that the replaceable roll snack does not provide sufficient hub change, but has to ... remove the replaceable roll in the calendar and the roll there to make the snacks • · ·.! can be mounted on both rollers.

• ♦ • ♦ · *. 20 • · ♦ ··

•. ·. SUMMARY OF THE INVENTION

• · · ··· · ♦ · · · · · ··· · ** ·. It is an object of the present invention to provide a rigid arrangement whereby a calender with a single ··· roll stack can be easily converted to a calendar with two overlapping separate roll stacks.

The features of the calender according to the invention are set forth in claim 1, · · · ·. characterizing part.

• * ···] !!! The features of the method according to the invention are set forth in the characterizing part of claim 12.

5,119,154

The calender comprises a frame and a roll stack supported on it. The roll stack consists of an upper roll and a lower roll, at least one of which is movably supported on the calendar frame, and intermediate rollers with pivot arms. The calendar has two modes. In En-5 mode, the calender has one roll stack and another mode has two separate stacked roll stacks.

In the first mode of operation, a predetermined group of adjacent intermediate rolls from the top or bottom intermediate roll is pivotally supported from the pivot points of each of the intermediate rollers to the first supporting member. This first support member is in turn removably attached to the calender body. In addition, the calender top roll or bottom roll is supported on the calender body by a first, removable spacer that adjusts the height of the calender roll stack or roll stacks in the height direction.

15

In the second mode of operation, the first support member is replaced by a second support member which is removably attached to the calender body in place of the first support member. The lower roll of the upper roll stack or the top roll of the lower roll stack or both • · · *; * is fixedly supported on one of the support members and • · 20 roll stacking rolls formed on the second support member are pivotally supported through the pivot points • • ·· '. The first spacer is removed, whereby the upper roller • · * • · * V or the lower roller is attached directly or through the second spacer to the caliper body size.

• In a calender with a single roll stack, the top roll and bottom roll are

• M

, ···. retracted tracks. In a calender with two roll stacks, the top rolls and lower rolls of each roll are strain compensated rolls, so the bending com- · · · ·!!! the number of retracted rolls doubles. With two separate roll stacks »· * · *, each roll stack can accommodate • · · 30 different line loads as needed. Thus, one-sided control of the gloss and web profile is improved in a calender with two separate roll stacks.

6, 119154

A calendar with two overlapping roll stacks in one and the same frame achieves better serviceability and cheaper construction compared to a calendar with two adjacent roll stacks in separate, interconnected frames.

5 Overlapping roll stacks in this application are not limited to the situation where the lines drawn through the roll centers of the roll stack rolls are in a vertical plane, but these lines can also form an angle with the vertical plane.

The invention will now be described with reference to the accompanying drawings, without, however, limiting the invention solely to those shown in the drawings.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 shows a multi-roll calender in its first mode of operation, wherein the calendar comprises a single roll stack.

Figure 2 illustrates the multi-roll calender of Figure 1 in its second mode of operation, whereby · · · '. *: Two separate roll stacks are formed from one roll stack.

: *** 20 »· • · | "Figure 3 shows an alternative to the calendar shown in Figure 1 in its first mode, where the calender comprises one roll stack.

• · · i · t »« «* · · • ♦ • ·

Figure 4 illustrates the multi-roll calender of Figure 3 in its second mode of operation, wherein:. 25 separate roller stacks are formed from one roller stack.

Fig. 5 shows a second multi-roll calender in its first operating mode, wherein the calender comprises one roll stack.

Figure 6 shows the multi-roll calender of Figure 5 in its second mode of operation, whereby · · *. **: two separate roll stacks are formed from one roll stack.

7, 119154

Figure 7 shows the multi-roll calender of Figure 5 in one of its first alternative second modes of operation, whereby two separate roll stacks are formed from one roll stack.

5

Fig. 8 is a view showing the multi-roll calender of Fig. 5 in another alternative working state thereof, whereby two separate roll stacks are formed from one roll stack.

Figure 9 shows one possibility for increasing the movement of the deflected compensated end rolls of the upper roll stack shown in Figure 2.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Figure 1 shows a multi-roll calender according to the invention in its first mode of operation, wherein the calendar has one roll stack. The calender comprises a vertical roll stack A having eight calender rolls 11, 12, 21-26. The calender rolls consist of the upper upper roll 11 and the lower lower roll 12 and the six intermediate rolls 21-26 between them. The nipples are formed by alternately • · ^ 20 smooth-faced press rolls 21, 24, 26, such as a metal roll, | "and a flexible-coated roll 22, 23, 25, such as the polymer roll roller. The upper roller I and the lower roller 12 are preferably flexible-coated rolls (TK) with The second • · 22 and the third intermediate rolls 23, viewed from above, have a soft surface forming a ··, 25 interlaced nip between them The upper roller 11 is rigidly supported by the first intermediate element 110 to the calender body R and the lower roller 12 is · · ·· ♦, ·, movably supported from its bearing housing 12a by means of a first conductor mechanism 70 through the housing R. In addition, a mounting is provided between the bearing housings 12a of the lower sleeve 12 and the housing R. • The first loading member 60, e.g. a loading cylinder, for moving the lower roller 12 ···! 30 in the nip plane S for closing and opening the nipples. - · · · · · · 26 is supported from its bearing housing 22a, 24a to the first end of the pivot arm 42, 44.

8 119154

The pivot arm 42, 44 is pivotably supported by the pivot point 42a, 44a in the central portion of the pivot arm 42, 44 to the body R. The other end of the pivot arm 42, 44 is supported by the lightening member 52, 54, e.g.

The calender shown in Figure 1 also comprises a first support member 100, on which the pivot arms 42 of the three uppermost intermediate rolls 21-23 are pivotally supported by pivot points 42a. This first support member 100 is secured to the body R by means of e.g. bolts and nuts such that it is removable from the body R by relatively simple steps. The arms 42, 44 of the two intermediate rolls 22, 24 and associated relief members 52, 54 are shown. the image would remain clearer. For the same reason, the output roll associated with each intermediate roll 21-26 is not shown in the figure.

Figure 2 shows the calender of Figure 1 in its second mode of operation, wherein the fish-15 blades have two separate, stacked roll stacks. This second mode of operation is achieved by removing the top roller 11 and associated first intermediate member 110 and the three upper intermediate rollers 21-23 and associated first supporting member 100 from the calender. The second supporting member 120 is then installed in place of the first supporting member 100. the support member 120 consists of a first support • • • # · *. The first support section 121 has a bearing * · Φ · | . housings 121a, 121b in which end bearings of lower roll 220 of upper roll stack B and end bearings of upper roll 230 of lower roll stack C are mounted. Bearing housings 121a, 121b are formed such that lower roll of upper roll stack B 220 φ · φφφ the outer surface of the jacket is at a distance from the upper roll of the lower roll stack C 230

; ·, 25 on the outer surface of the diaper. Lower roll 220 of upper roll stack B and C of lower roll stack

* **. ***. the upper roller 230 is fixedly supported by its end bearings on the first support part 121 of the second support member 120 and the second support member 120 is firmly supported on the calender body R. The lower roll 220 of the upper roll stack B and the top roll of the lower roll stack C φ φ.

"230 are preferably TK rolls with movable diapers. The upper roll stack B

The intermediate roller 21 is supported from its bearing housing 21a to the pivot arm 41 and the pivot arm 41 is supported by the pivot point 41a to the second supporting part 122 of the second support member 120. The upper roller 11 is supported directly on the body R without the intermediate member 110.

Thus, Figure 2 is formed from the single-roll calender A 5 shown in Figure 1 with a double-roll calender B, C with separate roll stacks B, C superimposed. The upper roll stack B has three rolls 11, 21, 220 and the lower roll stack C has five rolls 230, 24, 25, 26, 12. The upper roll stack B is closed and its nipples are loaded by moving diaper rolls 11, 220. The lower roll stack C is closed by the first the load member 60 and its nipples are loaded with movable 10 roll-over TK rollers 230, 12. The division into two separate roll stacks B, C is thus made at the rolls 22, 23 forming the replacement nip of the original roll stack A. The upper nip roll 22 of the change nip is replaced by a TK roll movable shell which forms the lower roll 220 of the upper roll stack B and the lower roll 23 of the change nip is replaced by a TK roll movable forming the upper roll 15 230 of the lower roll stack C.

Figure 3 shows an alternative to the calendar shown in Figure 1 in its first mode, wherein the calender comprises one roll stack. In this embodiment, the situation is inverted with respect to that shown in Fig. 1 so that the lower roll 12j, 20 is firmly supported from its bearing housing 12a by the first intermediate member 110 *, the calender body R and the upper roll 11 being movably supported by the first load. Through the connecting member 60 to the calender body R. The three intermediate rolls 24-26 above the lower roll 12 are here pivotally supported by the pivot points of the arms to the first support member 100. Figure 3 is also the same as Figure 1. shown only: · 25 articulation deflections 43, 45 of two intermediate rollers 23, 25 and associated lightening elements 53, «« ·, ··· 55 for the sake of clarity of the picture. For the same reason, the figure does not show at all *. 21-26 related output rollers.

Fig. 4 shows the multi-roll calender of Fig. 3 in its second mode of operation, whereby two separate roll stacks are formed of ··· 30 one roll stack. In this embodiment, the situation is inverted with respect to that shown in Figure 2 such that the upper roll stack ίο 119154 B consists of five rolls and the lower roll stack C consists of three rolls. The division into two separate roll stacks B, C is thus made at the rolls 24, 25 forming the replacement nip of the original roll stack A. The upper nip roll 24 of the change nip is replaced by the TK roll movable diaper which forms the lower roll 240 of the upper roll stack B 5 and the lower roll 25 of the change nip is replaced by the TK roll movable forming the upper roll 250 of the lower roll stack C.

Figure 5 shows another second multi-roll calender in its first mode of operation, wherein the calender has one roll stack. The calender comprises a vertical stack 10 of rolls 10 having ten calender rolls 11, 12, 31-38. The calender shown in Figure 5 is otherwise similar to the calender shown in Figure 1, so it will not be further described herein. Also, as in Figure 1, only the articulation arms 44, 46 of the two intermediate rolls 34, 36 and the associated lightening elements 54, 56 are shown in Fig. 5, in order to maintain a clear picture. For the same reason, the figure does not show any output rolls 31-38 associated with each of the 15.

Figure 6 shows the calender shown in Figure 5 in its second mode of operation, wherein the calender has two separate roll stacks. This second mode of operation is achieved by ··· v: essentially the same as in the calender shown in Figure 2, but in this case ··: *** 20, the upper roller 11 is not supported directly on the frame R, but is supported by the second support through the second conductor mechanism 71, the calendar R, similarly to the lower roll 12, is supported by the first conductor mechanism 70, into the calendar body R. Instead of the first intermediate member 110 * · · · ··· · * A second loading member 61 is also mounted, e.g., a loading cylinder for the upper roller .. 25 11 can be moved in the second guide mechanism 71. This second loading member • · • · · * ... 61 is required to close the upper rack B even when φ As a result of grinding, the calender rolls of the upper roller B have been reduced in diameter.

• · Φ • · 30 ·. Thus, Fig. 6 is formed from the single-roll calender A shown in Fig. 5 by a double-roll calender B, C with separate roll stacks B, C superimposed. The upper roll stack B has five rolls 11, 31, 32, 33, 340 and the lower roll stack C also has five rolls 350, 36, 37, 38.12. In this embodiment, the upper roll stack B is closed by the second embossing element 61 and its nipples are loaded by moving diaper rolls TK 11, 340. The lower roll stack C is closed by the first embossing element 60 and its nipples are made at rolls 34, 35 forming the replacement nip of the original roll stack A. The upper roll 34 of the change-over nip is replaced by a TK roll movable shell which forms the lower roll 340 of the upper roll stack B and the lower roll 35 of the change nip is replaced by a TK roll moving 10 forming the upper roll 350 of the lower roll stack C.

Fig. 6 also shows the fixed stop members 56a of the intermediate arms 46 of the lower roll stack C intermediate rolls 46. When the first load member 60 is lowered, the intermediate rolls 36-38 lower down until the stationary stopping members 56a stop the movement of the lever arm 46, leaving the nipples of the lower roll stack C open. The lever arms 46 are pressed against the fixed stop members 56a by the gravity of the intermediate rollers 31-33, and the lever arms 46 can be locked against the fixed stop members 56a by the lightening members 56.

Figure 6 further shows the articulation arms 43 of the intermediate roll stack B of the upper roll stack B; "associated adjustable stop members 53a. Initially, the lightening members 53 are • · · • · ·

driven blow to the bottom for maximum nipples. Upper roll stack B

The sealing of the nipples is started by raising the skirt of the lowest moving roll 340 of the upper roll stack B to the upper position. The upper roller 11 is then moved downwardly by the second embossing member 61, whereby the nipples close from the top down. Spacing • ··. ···. Looms 31-33 have full relief. In the driving situation, the second loading member 61 is locked and · · · ·. nipple loads are adjusted by the upper roller roller 11 roller and the lower roller roller 340 of the upper roll stack • · · ♦ ♦ * tt B opening the upper roller stack B nipples • «•« is performed by the lower roller drive station , whereby the intermediate rollers 33, 32, 31 follow and stop on the adjustable stop member 53a, so that a gap of about 5 mm is formed in the nipples which makes a total of 20 mm by the 12 119154 four nipples. Top roll 11 stays in place. The 50 mm stroke length of the lower movable sheath roll 340 of the upper roll pin B is sufficient to close said 20 mm gap. However, as a result of grinding, the outer diameters of the rolls 11, 31, 33, 340 of the upper roll stack B are reduced to such an extent that the stroke length of the lower movable roll 340 of the upper roll stack B is no longer sufficient to close the nips. In this case, the setting of the stop members 53a of the upper roll stack B intermediate rolls 31-33 must be adjusted so that they lower the intermediate rolls 31-33 so that the overall opening gap is adjusted to a stroke length of the lower movable shell roll 340 10 of the upper roll stack B. At the same time, the top roll 11 is lowered with the second loading member 61. The larger nip gap required by the head insertion is tracked by extending the lightening members 53 in an out-of-position position and raising the top roll 11 with the second loading member 61 to provide gaps of more than 10 mm at the nip between the rolls 11, 31-33, 340.

15

Figure 7 illustrates the multi-roll calender of Figure 5 in a first alternative second mode of operation, wherein two separate roll stacks are formed from one roll stack. In this embodiment, the top roll 11 is rigidly supported • · · [; 1 1 directly from its bearing housing 11a to the machine frame R. The lowest roll of the upper roll stack B • · *. In this embodiment, the 20 340 is supported by the • · • 1 ·: located in connection with the second support member 120. to the second guide mechanism 71. The bearing roll 340a of the lower roll 340 of the upper roll stack B is further supported by a second loading member 61 on the calendar runner. The second loading member 61 is disposed on the first supporting member 121 of the second supporting member 120. Thus, only the top roll 350 of the lower roll stack C is here:. 25 disposed in the first support portion 121 of the second support member 120.

• ♦♦ ♦ »· • φ • · • · .1. Thus, Fig. 7 is formed from a single-roll calender A shown in Fig. 5, M (a list of two-roll calendars B, C with separate racks B, C lying on top of each other. The upper rack B has five rolls 11, 31 , 32, 33, 340 and lower ·· 30 rack C also has five rails 350, 36, 37, 38, 12. The upper rack B is closed by Φ · · 1 in this embodiment by the second loading member 61 and its nipples being loaded by 119154 13 moving TK rolls 11 , 340. The lower rack C is closed by the first loading member 60 and its nipples are loaded by movable jacketed TK rolls 350, 12. In this embodiment, fixed stopping means can be used in both the upper B and lower C roll stack.

5

Fig. 8 is a view showing the multi-roll calender of Fig. 5 in another alternative working state thereof, whereby two separate roll stacks are formed from one roll stack. Here, the original number of rolls on the calendar has been reduced by two, i.e. the original intermediate rolls 31 and 32 have been removed. Thus, the upper roll stack B has three to ten rolls 11,33, 340 and the lower roll stack C has five rolls 350, 36-38, 12. The first spacer member 110 is further replaced with a second spacer 130 to provide space for the roll stack B, C in the calender height direction. is set to fit. As the second spacer member 130 becomes relatively high, it is further supported on the side to the second spacer member 120 or directly to the body R.

15

Figure 9 shows one possibility of the upper roll stack B shown in Figure 2

moving diaphragm, deflection compensated (TK) end rolls 11, 220 ... (movable. TK rolls 11, 220 with movable diaphragm are rigidly supported »· · • 1 2 (from bearing housing 11a, 220a to calender body R. TK rolls 11, 220 are provided with · · · With a cylindrical bearing housing 510, • · ·:, · 520, which is mounted on a pivot bearing of 20 support points, having an inner and outer diameter that are off-center, rotating the eccentric • · · • ·· · allows the TK roll 11, 220 to move with its support center - ··· .3 direction S. The eccentric housing rotation angle is determined by changes in · · ··· roller diameters and the operating positions are locked mechanically. wherein the sheaths of the rolls 11, 21, 220 of the upper roll stack B are small • · .3.3, as a result of abrasion or retreading.

• M

30 «· 2» ♦♦ 3 • · 14 119154

In the embodiments shown in the figures, the second support member 120 is comprised of a first support member 121 and a second support member 122. These support members 121,122 forming the second support member 120 may consist of one piece or two separate pieces.

5

In the embodiments shown in the figures, either the upper roll 11 or the lower roll 12 is movably supported by a loading member on the calender body. Naturally, the invention can also be applied in a situation where both the upper roll 11 and the lower roll 12 are movably supported by the loading means on the calender. A removable intermediate member can then be used under either of the loading members 10 to adjust the height of the roll stack in the calendar.

In the embodiments shown in the figures, the intermediate rollers are supported on the body such that the bearing housing of the intermediate roller is secured to one end of the lever arm, the relief cylinder is leaned to the other end of the lever arm and the lever arm is supported at its center pivot point. Of course, the invention can equally be applied to a calendar in which the intermediate rollers are supported on the frame with the intermediate roller bearing housing secured to the first end of the lever arm, the lever arm supported on the second, first end opposite to the hinge point to the frame and is secured between the articulation of the articulation bearing housing.

• · e ·· · · · · · · · ·

In the figures, the invention is applied to a calender with eight rolls and to a calender, • · · !!! with ten rolls. Naturally, the invention can be applied to any calender with a top roll, a lower roll, and any number of intermediate rolls.

·. In the figures, the invention has been applied to a calender where the rolls of roll stack A, B, C are centered. *. the line drawn through the dots is in the vertical plane, but the invention can be a natural • · »•« ·! * also applies to a situation where a straight line drawn through the center of the rolls of the roll stack • · forms an angle with the vertical plane.

• H

···: 30 • ♦ • · · • ·· • · 15 119154

Of course, the calender according to the invention can also, in both modes of operation, also perform various partial nipples known per se. In this case, one or more intermediate rollers are locked and only one or a few calendar nips are used for calendering the web.

5

The invention has been described above by way of example with reference to the figures in the accompanying drawings. However, the invention is not limited to the figures only, but different embodiments of the invention may vary within the scope of the inventive idea defined in the appended claims.

· ♦ • · 1 1 1 • • «« «1 1 1 m 1 m m 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ·· * 1 • ·· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·––––––––––– • ·· * 1

Claims (22)

The multi-roll calender (K) comprises a frame (R) and a roll stack (A) supported thereon, the roll stack (A) comprising a top roll (11) and a lower roll (12), at least one of which is movably supported on the calendar frame (R) 21-26; 31-38) with end bearings supported by pivot arms and pivotally supported by pivot points on the calender body (R), the calender comprising a first mode of operation wherein the roll stack (A) acts as one roll stack and a second mode of operation wherein the roll stack (A) is divided into an upper roll stack (B) and a lower roll stack (C), characterized in that in the first mode of operation: - a pre-selected set of adjacent intermediate rolls starting from the upper or lower intermediate roll is pivotally supported by the ) which is removably attached to the fishing frame (R) so that the rest of the intermediate rolls are pivotally supported by the intermediate roll via the pivot points of the articulation arms directly to the frame (R), - the lower roller (12) or the upper roller (11) is supported by the removable first spacer member (110) to the calender frame (R), · · ί ** · 20 - the first support member (100) is replaced by a second support member (120) removably attached to the calender body (R) in place of the first support member (100) • · * ••• J, whereby the first roll stack (B) the lower roll or the roll of the second roll stack (C) • * # The top roll or both are rigidly supported on one of the support members (120) and • # "· The roll roll or rolls of the roll stack formed on the second support member (120) are pivotally supported through the pivot points of the • * (no),] ·] · '- the first spacer (110) is removed, whereby the upper roll (11) or lower roll (12) is rigidly supported directly or by a second removable v panel member (130) via • # "·· * * public on the frame (R) or of the second loading member (61) between Φ .. *** 30 tyksellä on the frame (R). φ φ • φ Φ • φ φ φ φ 17 119154 A calendar according to claim 1, characterized in that the upper roll (11) and the lower roll (12) are movable diaphragm rolls. A calendar according to claim 1 or 2, characterized in that the calendar 5 comprises, in a first mode of operation, a roll stack (A) having six intermediate rolls (21-26) and in a second mode of operation an upper roll stack (B) having one intermediate roll (21) and a lower a stack of rolls (C) having three intermediate rollers (24-26), wherein - in the first mode of operation, the three upper intermediate rollers (21-23) are supported to pivot through the pivot points of the intermediate rolls to the first support member (100); the first spacer (110) being movably supported by the calender body (R) and the lower roll (12) through the first loading member (60) into the calender body (R), - in the second mode of operation, the first spacer (110) is removed and the upper roller (11) calender body (R), lower roll (220) of upper roll stack 15 (B) and upper roll (230) of lower roll stack (C) supported by motion n spaced apart from the support member (120) and the sole intermediate roll (21) of the upper roll stack (B) is pivotable through the pivot point of the intermediate roll to the second supporting member (120) and the three intermediate rolls (24-) of the lower roll stack (C). 26) remain in the same manner as in the first mode ··: '** supported by the pivot points of its pivot arms to the calender body (R) ··· · · ** and the lower roller (12) remain the same as in the first mode · · · · '·' · '· Movably through the first loading member (60) to the calender's large * ···' size (R). * φ · v '• · • · + · .. 25 Calender according to Claim 3, characterized in that the lower roll (220) of the upper roll holder (B) and the upper roll (230) of the lower roll stack (C) are movable, deflection compensated. a teloj a. • · e · · • · · · · φφφ φ φ Calender according to Claim 4, characterized in that the end bearings of the upper roller 30 non (B) upper roller (11) and the lower roller (220) end bearings are arranged in a position 18. 119154 provided with a cylindrical bearing housing (510, 520) having an inner and outer diameter which are eccentric to each other. Calender according to Claim 1 or 2, characterized in that the calender 5 comprises a roll stack (A) with six intermediate rolls (21-26) in a first mode and an upper roll stack (B) with three intermediate rolls (21-23) in a second mode. and a lower roll stack (C) having a single intermediate roll (26), wherein - in the first mode of operation, the three lower intermediate rolls (21-23) are pivotally supported through the pivot points of the intermediate rolls to the first support member (100); rigidly supported by the first spacer (110) on the calender body (R) and the upper roll (11) movably supported by the first loading member (60) on the calender body (R), - in the second mode of operation, the first spacer (110) is removed and the lower roll (12) stationary directly on the calender body (R), the lower roll (240) of the upper roll stack 15 (B) and the upper roll (250) of the lower roll stack (C) are rigidly supported by one another the single support roll (26) of the lower roll stack (C) is pivotally supported by the pivot point of the intermediate roll joint to the second support member (120) and the three intermediate rolls (21-23) of the upper roll stack * f · V: (B) ) remain the same as in the first • • • ·: ** 20 modes supported by the pivot points of their joints ·· • · | The size (R) and top roll (11) remain movably supported by the first loading member (60) in the calender body (R) as in the first operating condition. Calender according to Claim 6, characterized in that the lower roll (240) of the upper roll clamp (B) and the upper roll (250) of the lower roll clamp (C) are movable, deflection compensated. a teloj a. Calender according to claim 1 or 2, characterized in that the calender 30 comprises, in the first mode of operation, a roll stack (A) having eight intermediate rolls. * * • · 19 119154 (31-38) and in the second mode the upper roll stack (B) with three intermediate rolls (31-33) and the lower roll stack (C) which also has three intermediate rolls (36-38), where in operation, the top five intermediate rollers (31 -35) are pivotally supported from the pivot points of the intermediate roller arms to the first support member (100), the top member (11) is rigidly supported through the first intermediate member (110) to the calendar body (R); supported movably by the first loading member (60) on the calender body (R), - in the second mode of operation the first intermediate member (110) is removed and the upper roller (11) is supported movably by the second loading member (61) the anter body (R), the lower roll (340) of the upper roll stack (B), and the top roll (350) of the lower roll stack (C) are rigidly supported on the second support member (120) spaced apart and three spacer rolls of the upper roll stack (B) 31-33) are pivotally supported by the pivot points of the intermediate rolls to the second support member (120) and the three intermediate rolls (36-38) of the lower roll stack (C) remain in the same manner as the first mode supported by the pivot pivots to the calender body (R) remains in the same manner as in the first mode, movably supported by the first loading member (60) on the calender body (R). ··· • · · • · t ··: * ·· 20 Calender according to Claim 8, characterized in that the lower roll (340) of the upper roll clamp (34) and the upper roll (350) of the lower roll stack (C) are movable casings, deflection compensated rolls. Calender according to claim 1 or 2, characterized in that the calender 25 comprises in its first mode of operation a roll stack (A) having eight intermediate rolls. · «* ... (31 -38) and in the second mode the upper roll stack (B) with three intermediate rolls S s *" (31-33) and the lower roll stack (C) which also has three intermediate rolls (36-38) wherein, in the first mode of operation, the five upper intermediate rollers (31 -35) are supported pivotally via the pivot points of the intermediate rollers to the first support member 30 (100), the upper roller (11) being rigidly supported by the first spacer member (110) through the calender body (R) and the lower roller (12) supported by the first load member (60) on the calender body (R), - in the second mode of operation, the first spacer member (R); 110) has been deleted u and upper roll (11) are rigidly supported directly on calender body (R), upper roll (350) of lower roll stack S (C) is rigidly supported on one support member (120) and lower roll (340) of upper roll stack (B) is movably supported on through the load-loading member (61), the second support member (120) and the three intermediate rolls (31-33) of the upper roll stack (B) are pivotally supported by the pivot points of the intermediate rolls to the second supporting member (120) and the three 10 rollers (36). -38) remain supported in the same manner as in the first mode through the pivot points of the pivot arms to the calender body (R). Calender according to Claim 10, characterized in that the lower roll (340) of the upper roll stack (B) and the upper roll (350) of the lower roll stack (C) are movable, deflection compensated rolls. A method in a multi-roll calender (K), the multi-roll calender comprising a frame (R) and a supported roll stack (A), the roll stack (A) comprising a top roll (11) and a lower roll (12), at least one of which movably supported on the calender body (R), and • ·: '·· 20 intermediate rolls (21-26; 31-38) with end bearings supported on the pivot arms and pivotally supported by pivot points on the calender body (R) ), Whereby the calender is provided with a first mode of operation in which the roll stack (A) • · * * ·: · * acts as a single roll stack and another mode in which the roll stack (A) is divided into the upper • · · · * To the head roll stack (B) and to the lower roll stack (C), characterized in that in the first 25 operating modes: • · * .. \ - a group of adjacent intermediate rolls starting from the upper or lower intermediate roll are selected; Supporting the group swivel each the intermediate roller joint pivot point *. *. * to the first support member (100) which is removably attached to the fish body (R) so that the remaining intermediate rolls are pivotally supported by the intermediate roller joint, * { * 30 via arm pivot points directly to body (R), 21119154 - supported by lower roller (12) or upper roller (11) via removable first spacer (110) to calender body (R) in second mode: - replacing the first support member (100) with a second support member (120) removably secured to the calender body (R) in place of the first support member (100), wherein the lower roll of the upper roll stack (B) or the upper roll of the lower roll stack (C) the intermediate roll (s) of a roll stack to be formed fixedly on one of the support members (120) and on the second support member (120) is pivotally supported by the pivot points of the pivot arms to the other support member removing the first spacer (110), the upper roll (11) or the lower roll (12) being rigidly supported directly or via a second removable spacer (130) to the calender body (R) or movably through the second loading member (61) body (R). The method according to claim 11, characterized in that movable-shell, deflection compensated rolls are used as the upper roll (11) and the lower roll (12). Method according to Claim 12 or 13, characterized in that a roll stack (A) having six ··: * · · 20 intermediate rolls (21-26) and a top roll stack in the second operating mode is formed on the fish blades. (B) having one spacer φ · i * * * roll (21) and lower roll stack (C) having three spacer rolls (24-26), with e ·: - in the first mode, the three upper spacer rollers (21) are supported -23) pivoting through the pivot points of the intermediate rollers to the first support member (100), the upper roller (11) is movably supported by the first intermediate member 25 (110). to the frame (R) and movably support the lower roll (12) through the first loading member (60) to the calender body (R), • · • i 7. In the second mode, remove the first spacer (110) and support the upper roll • 110. 11) motionless straight n calender body (R), supporting the lower roll (220) of the upper roller (220) and the upper roller (230) of the lower roller (C) immovably to the second support member (120). spaced apart and supporting the sole intermediate roll (21) of the upper roll stack (B) pivotally through the pivot 22 119154 of the intermediate roll joint to the second support member (120) and holding the three intermediate rolls (24) of the lower roll stack (C). 26) in the same manner as in the first mode supported by the pivot points of its articulation arms on the calender body (R) and held by the lower roll (12) as in the first mode supported 5 movably by the first loading member (60) on the calender body (R). A method according to claim 14, characterized in that movable-shell, deflection compensated rolls are used as the lowest roll (220) of the upper roll stack (B) and the upper 10 roll (230) of the lower roll stack (C). Method according to Claim 15, characterized in that the end bearings of the upper roller (11) of the upper roll stack (B) and the end bearings of the lower roller (220) are mounted in a cylindrical bearing housing (510, 520) having an inner and outer diameter. 16 119154 Method according to Claim 12 or 13, characterized in that a first stack of rolls (A) having six ··· V intermediate rolls (21-26) is formed in the calendar and an upper roll stack (B) of three ··· in the second mode of operation. : * ·· 20 spacer rolls (21-23) and lower roll stack (C) with one spacer (26), so that • e: * · * - the first three modes support the lowest three spacer rollers (21-23). * · Ί.ί: T-link rolls through the pivot points of the arms to the first support member • · · '♦ j ·' (100), the lower roller (12) is rigidly supported by the middle of the first intermediate member (110) ♦ »* ··· * R) and movably supporting the upper roller (11) through the first 25 loading members (60) to the calender body (R), • · * ... - in the second mode of operation, removing the first spacer member (110) and supporting the lower roller (12); motionless directly in the calender body (R), supporting the lower roll (240) of the upper roller (*) V non (B) and the upper roller (250) of the lower roller (C) into a second support member (• · · • * * ··· ' 120) spaced apart and supported by a single intermediate roller (26) of the lower roller stack (C) (26) pivotally through the pivot point of the intermediate roller arm to the second support member (120) and held by the upper roller stack (B) 23,119,154 three spacer rollers (21-23) similarly supported in the first mode by the pivot points of their pivot arms to the calendar body (R) and held by the upper roller (11) movably supported by the first loading member (60) on the calender body 5 (R). A method according to claim 17, characterized in that movable-diaphragm, roll compensated rolls are used as the lowest roll (240) of the upper roll stack (B) and the upper roll (250) of the lower roll stack (C). 10 Method according to Claim 12 or 13, characterized in that a first roll mode stack (A) having eight intermediate rolls (31-38) is formed in the calendar, and an upper roll stack (B) having three intermediate rolls (31-33) and a lower roll stack (C) also having three intermediate rollers (36-38), wherein - in the first mode of operation, the five upper intermediate rollers (31-35) are pivotally supported from the pivot points of the intermediate rollers to the first support member (100); 110) via the fish V: to the caliper body (R) and movably support the lower roller (12) through the first load-carrying unit * · i * ·· 20 tapping member (60) to the calender body (R), ·· ί * * in the second mode a spacer (110) and supporting the upper roll • · • * I ί · ϊ: (11) movably through the second loading member (61) to the calender body • · · '• j; * (R), supported by y the lower roll (340) of the lower roll stack (B) and the upper roll (350) of the lower roll stack (C) motionlessly to the second support member (120) at a distance,. And pivotally supporting the three intermediate rollers (31 -33) of the upper roll stack (B) through the pivot arms of the intermediate rolls to the second support member (120) and • · * "holding the three intermediate rolls (36-38) of the lower roll stack (C) as in the first mode supported by the pivot points of the pivot arms • · * ·; · 'to the calender body (R) and held by the lower roll (12) in the same manner as in the first mode, * · * 30; by means of the first loading member (60) · •. '*: to the calender body (R) 24 119154 A method according to claim 19, characterized in that movable-shell, deflection compensated rolls are used as the lowest roll (340) of the upper roll stack (B) and the upper roll (350) of the lower roll stack (C). 5 Method according to Claim 12 or 13, characterized in that a roll stack (A) having eight intermediate rolls (31-38) is formed in the first mode of operation and in the second mode an upper roll stack (B) having three intermediate rolls (31-33). ) and a lower roll stack (C) also having three intermediate rolls (36-38), wherein - in the first mode of operation, the top five intermediate rollers (31-35) are pivotally supported through the pivot points of the intermediate rolls to the first support member (100); via the first spacer (110) to the calendar frame (R) and movably supporting the lower roll (12) to the calendar frame (R) through the first 15 loading members (60), - in the second mode of operation, removing the first spacer (110) and supporting the upper roll (11) (R), rigidly supporting the top roll (350) of the lower roll stack (C) to the second support member (120) and supporting the MV a lower roller (340) of a lower roll stack (B) movably via a second loading member (61) ···: 1 ′ 20 to a second support member (120) and supporting three intermediate rollers (31 -33) of the upper roll stack (B) pivotally through the pivot points • · 9 · · * “'to the second support member (120) and holding the three intermediate rolls of the lower roll stack (C) • 1 1 ·' • j · '(36-38) in the same manner as the pivot points supported in the first mode; 1 through the articulation points of the sponges to the calender body (R). The method according to claim 21, characterized in that e · * ** 1 is used as the lowest roll (340) of the upper roll stack (B) and the upper roll of the lower roll stack (C) * * · 1 · 1 roll (350) movable-shell, deflection compensated rolls. • 1 · • · ··· «· ♦ ·· • t • · ·» 25 119154