CN103842587B

CN103842587B - Calender

Info

Publication number: CN103842587B
Application number: CN201280035433.XA
Authority: CN
Inventors: K·库比克; H·布鲁德尔; U·克勒尔斯; K-H·蒙塔格; J·瓦尔特范
Original assignee: Andritz Kuesters GmbH
Current assignee: Andritz Kuesters GmbH
Priority date: 2011-07-28
Filing date: 2012-07-12
Publication date: 2017-02-15
Anticipated expiration: 2032-07-12
Also published as: EP2913435B1; EP2737126A1; WO2013013994A1; DE102011052229A1; EP2913435A1; CN103842587A; EP2737126B1

Abstract

The invention relates to a calender (100) for treating a product web (1), comprising several rolls (2, 3, 4), wherein at least one hard roll (3) is provided, which together with two soft rolls (2, 4) forms two nips (5, 6), wherein the hard roll (3) is preferably heated, wherein the planes of action planes (7, 8) of the soft rolls (2, 4) with the hard roll (3) are located at an angle y relative to one another, said angle being smaller than 180 .

Description

Calender

Technical field

The present invention relates to a kind of calender for processing product breadth, including multiple rollers, it is provided with least one hard Roller, described hard roller and two soft rollers constitute two roll gaps, and hard roller is heated.This calender is for example by DE 196 50 576 A1 are open.This calender is used for two-sided calendering product breadth.

Background technology

Soft roller represents such roller, and it has elastomeric cover facings in other words.Hard roller refers to the roller not having this cover layer. Elastomeric cover in other words elastic facings for high overrolling frequencyAnd thermotonuses Sensitive.Also acutely extrude facings by rolling big linear force.Therefore in high-performance calender (high linear force and temperature and With maximal rate) use two soft rollers, the common roller other with of this two rollers constitutes two roll gaps, once to pass through In, i.e. product breadth pass through two roll gaps in the case of realize desired effect.

In known calender disadvantageously, in addition soft roller bears the inequality in larger thermic load and a roll gap Even property is for example based on slubbing such as linear slit by producing considerable influence to another roll gap.

Content of the invention

The task that the present invention is based on is a kind of this kind of calender and the method proposing not having disadvantages mentioned above.

This task is addressed by the calender according to the present invention in terms of its device, and this is used for processing product breadth Three roller calenders include a hard roller, and described hard roller and two soft rollers constitute two roll gaps, the work of wherein said soft roller and hard roller It is formed at the angle between 110 ° and 70 ° to each other with plane, wherein, slubbing sensor is set, the detection of this slubbing sensor is produced The slubbing of product breadth, is provided for detecting device and the control device of product web speed, and described control device is sensed by slubbing The value of device and product web speed calculate slubbing and pass through the moment of roll gap and so reduce corresponding roll gap slightly before in this moment Linear force so that slubbing can pass through roll gap in the case of not causing damage.

Multiple rollers are included for the calender processing product breadth according to the present invention, are provided with least one hard roller, Described hard roller and two soft rollers constitute two roll gaps.Multiple hard rollers can also be set, and they constitute two with two soft rollers respectively Roll gap.But it is preferably provided with just what a hard roller, this hard roller and two soft rollers constitute two roll gaps.At least one hard roller described is preferred Heated.Soft roller forms the angle γ less than 180 ° to each other with the action plane of hard roller.Soft roller with the action plane of hard roller is The plane that finger is defined by the rotation axiss of hard roller and the rotation axiss of corresponding facings roller.

It is achieved in multiple advantages：On the one hand reduce the thermic load that soft roller is subject to based on convection current due to hard roller.The opposing party Face, when forming the angle less than 180 ° to each other when the action plane of two soft rollers and hard roller, in other words, that is, when two soft rollers When two action plane are not overlapped into a unique plane, the inhomogeneities in a roll gap less influence on another roll gap.

The rotation axiss of preferably hard roller are higher than the rotation axiss of at least one described soft roller, the rotary shaft of preferably two soft rollers Line.The thermic load that soft roller is subject to thus can be reduced based on hard roller convection current.

When the rotation axiss of two soft rollers are located on sustained height, especially when the diameter of two soft rollers is consistent, soft Roller is subject to especially uniform and little thermic load.

Unrelated with the concordance of two soft roller diameters, when preferably above hard roller is evenly provided on two soft rollers, that is, when Two action plane on absolute value with equal angular when horizontal line rotates, soft roller is subject to uniform thermic load.

Roll gap preferably can control independently of one another.Linear force in therefore one roll gap preferably can be independent of in another roll gap Linear force controlled and adjusted in other words.

Optimized angle γ between 110 ° and 70 ° and is further preferably about 90 °.When angle γ is 90 °, two works Perpendicular to one another with plane.The change of the linear force in other words of the inhomogeneities in one roll gap is therefore minimally affected another roller Gap.Arranged based on 90 °, roll gap (almost) can change independently of one another and not influence each other.This is especially beneficial when linear slit passes through. Because achieving the premise of following processes：First roll gap is opened, is allowed slubbing to pass through and be again switched off immediately.In this process phase Between second roll gap continue calendering, until the second roll gap linear slit pass through also open slightly before, allow thickened section to pass through and here it Also it is re-closing off afterwards.Therefore achievable：The only minimum product loss not being calandered.All the time one need only be controlled in this process Individual pressure (i.e. the pressure of only one roller), because 90 ° of arrangements prevent linear force from influencing each other.(γ is not equal in other cases 90 °), accordingly another linear force must be adjusted during roll gap when linear slit passes through simultaneously, must adjust the pressure of two rollers simultaneously. This is increasingly complex process in control technology, and this process at least needs the plenty of time and usually produces more defects.

It is preferably provided with slubbing sensor, this slubbing sensor detects the slubbing of product breadth.Slubbing can be vertical or incline The slubbing such as linear slit that tiltedly extends on the whole width of product breadth in direction of advance or only occur in one region of product breadth Thickened section.Product web speed or can Negotiation speed sensor measure generally known to roller rotary speed.

It is preferably provided with control device, this control device is calculated slubbing and led to by the value of slubbing sensor and product web speed Spend the moment of roll gap and so reduce the linear force of corresponding roll gap slightly before so that slubbing can not cause roll gap to damage in this moment Pass through roll gap in the case of bad.Preferably linear force was only reduced within the shorter time period.Guarantee such as line in this way Do not cause when seam is by roll gap damage in calender and on the other hand guarantee product breadth be not loaded pressure by hope Section as little as possible.

Linear force change in roll gap is preferably realized by the pressure change of soft roller.

Especially in the action plane to each other in shape embodiment at an angle of 90 of soft roller and hard roller, control device is preferred So reduce the linear force of roll gap so that time period of being reduced of the linear force of two roll gaps is not overlapping.This is possible, because 90 ° of arrangements prevent linear force from influencing each other.

Preferably at least one described soft roller is that flexure is controlled.At least one, preferably two of particularly preferred two soft rollers Soft roller is dancer.Dancer refers to such roller, and it has the hollow roll of composition working roll circumference of cincture and according to length Run through the circumferentially non-rotatable transverse arm separated by a distance of the inner periphery with hollow roll of hollow roll.Between hollow roll and transverse arm Space in form the pressure chamber that at least one can be filled pressure fluid, this pressure chamber passes through sealing device separately.Sealing dress Put and end cross sealing device is had on the end put toward each other of pressure chamber and along transverse arm and hollow roll longitudinally in roller Action plane both sides on extend longitudinal sealing device, described sealing device is the form of sealing strip.This roller is for example by DE 38 32 405 C1 are open.

Advantages of the present invention is particularly suitable for this.Because dancer has steel pipe (hollow roll), this steel pipe is by designing decision Must have certain degree of hardness rigidity in other words.Therefore produce relatively large uneven in this roll gap when slubbing passes through roll gap Property because dancer cannot for example " point-like " adapt to expected from slubbing.Phase is produced in the whole length of roll gap based on its rigidity When big inhomogeneities.In order to reduce the linear force in roll gap for slubbing, need in addition to change multiple in the case of dancer Pressure parameter.This requires time for.90 ° of arrangement guarantees here second roll gap to action plane to each other in a preferred embodiment Only it is subject to minor impact and the defect section of product breadth keeps shorter.

In one embodiment, at least one described soft roller, preferably two soft rollers are plunger rides and preferably have The roller of internal end of travel, in the case of this roller, roller tube preferably simultaneously constitutes facings cover layer in other words.Expected slubbing can be in roller Inhomogeneities in gap generally less shorter in time in other words in the case of pass through this roller.But in this soft roller Extremely advantageous, soft roller is reduced in the calender according to the present invention based on the thermic load that hard roller convection current is subject to.

Described task is passed through according to the present invention for by means of three roller calender calendering product breadths in terms of its method Method solving, this three rollers calender includes a hard roller, and described hard roller and two soft rollers constitute two roll gaps.The method bag Include following step：

- guide product breadth by a roll gap being made up of hard roller and soft roller；

- so that product breadth is turned to around slewing rollers；

- the second roll gap is passed through in the guiding of product breadth, this second roll gap is made up of the second soft roller and same hard roller, and The action plane of soft roller and hard roller is formed at the angle between 110 ° and 70 ° to each other and is preferably about 90 ° of angle γ.

It is preferably provided with following further method and steps：

- before slubbing reaches roll gap, the slubbing that detection is located in product breadth；

- determine the moment by roll gap for the slubbing；

- reduce the linear force in roll gap slightly before respectively so that slubbing can not cause soft roller facings to damage in this moment In the case of pass through roll gap；

- improve linear force to initial value.

Especially be about in 90 ° of method embodiment in angle γ, linear slit by when be preferably as follows and carry out：First roller Gap is opened, is allowed slubbing to pass through and be preferably again switched off immediately.During this process, the second roll gap preferably continues to calendering, until Second roll gap passes through also to open slightly before, allow thickened section to pass through and be also re-closing off after this in linear slit.Therefore achievable： The only minimum product loss not being calandered.All the time a pressure (the i.e. pressure of only one roller need only be controlled in this process Power) because 90 ° of arrangement heres prevent linear force from influencing each other.

Therefore, the preferred non-concurrent of the linear force of two roll gaps but reduce with staggering in time.Two roll gaps linear The time that power is reduced is not preferably overlapping.The linear force of roll gap is preferably separate or is almost changed independently of each other.Therefore The control of the linear force of one roll gap does not preferably consider the linear force distribution curve of another roll gap.

In the another embodiment of the method, angle γ is not equal to 90 ° and adjusts phase when linear slit passes through simultaneously Should another linear force.Preferably adjust the pressure of two rollers simultaneously and further preferably adjust associated with one another.This is in control System is technically increasingly complex process, and this process at least needs the plenty of time and usually produces more defects.

Brief description

Describe the present invention by accompanying drawing illustrated embodiment in detail below.Accompanying drawing is as follows：

Fig. 1 is calender disclosed in prior art, and the action plane of two soft rollers and hard roller is overlapped into one wherein Unique plane and this plane is vertical；

Fig. 2 is a kind of calender, and the action plane of two soft rollers and hard roller is overlapped into a unique plane simultaneously wherein And this planar horizontal extends；

Fig. 3 is a kind of calender, and shape is at an angle of 90 and hard roller to each other for the action plane of two soft rollers and hard roller wherein Rotation axiss be higher than one of rotation axiss of soft roller and the rotation axiss of two soft rollers are not on sustained height, but The rotation axiss of the rotation axiss of one soft roller and hard roller are in one and highly go up；

Fig. 4 is a kind of calender, and shape is at an angle of 90 and hard roller to each other for the action plane of two soft rollers and hard roller wherein Rotation axiss be higher than that the rotation axiss of two rotation axiss of soft roller and soft roller are on sustained height；

Fig. 5 is a kind of calender, and the action plane of two soft rollers and hard roller forms about hexagonal angle γ simultaneously to each other wherein And the rotation axiss of roller firmly are higher than two rotation axiss of soft roller and the rotation axiss of soft roller are on sustained height.

Specific embodiment

The calender being represented with reference 100 on the whole be have two can independent control roll gap three roller calenders For two-sided calendering product breadth, bend controlled tool in other words including a heated backing roll 3 and two flexures are controlled The roller 2,4 of flexible facings.Hard roller 3 is heated steel rider in the embodiment shown.Soft roller 2,4 is straight in the embodiment shown The consistent dancer in footpath.Described soft roller also can be tempered.

Fig. 1 illustrates a kind of calender disclosed in prior art, and all three roll axis are vertically overlapping up and down wherein Ground is located in a vertical plane.Here disadvantageously, heat suffered by the convection current based on heated hard roller 3 for the soft roller in upside 2 Load represents larger with waved arrow in FIG.

Fig. 2 illustrates a kind of calender, and all three roll axis are in a horizontal plane wherein.With the cloth in Fig. 1 Put and compare, make soft roller be subject to relatively low thermic load again by the convection current that waved arrow represents.

In the calender according to the present invention that figure 5 illustrates, the action plane of two soft rollers 2,4 and hard roller 3 is to each other Form about 120 ° of angle γ.The action plane of two soft rollers 2,4 and hard roller 3 intersects on the rotation axiss 9 of hard roller.Intersecting from this Axis rises, and each action plane is divided into region 7a or 8a at rotation axiss place of accordingly soft roller and does not have other rotation axiss Region 7b or 8b.In the scope of the literature, action plane angle γ to each other refer to all the time action plane region 7a, 8a it Between angle, the rotation axiss of soft roller also are located in described action plane region.Fig. 5 calender center roller gap 5,6 mutual Impact influences each other less than the calender center roller gap shown in Fig. 1 and 2.Hard roller 3 is evenly provided on above two soft rollers 2,4. Two rotation axiss 10,11 of two soft rollers 2,4 are on sustained height and two soft rollers have same diameter, thus two The action plane 7,8 of soft roller 2,4 forms 30 ° of angles α, β with horizontal line respectively.In other words, two action plane 7,8 are on absolute value Rotated from horizontal line H with equal angular α, β.The thermic load that soft roller is subject to is less than in calender shown in Fig. 1 and 2 and is subject to Thermic load.

Fig. 3 illustrates a kind of calender 100, wherein, the action plane 7 of soft roller 2 and hard roller 3 and another soft roller 4 with Action plane 8 shape of hard roller 3 is at an angle of 90.The rotation axiss 10 of one soft roller 2 and the rotation axiss 9 of hard roller 3 are arranged on same height On degree.Because soft roller 2,4 is all not set above heated hard roller 3, so soft roller is born based on the heat that hard roller convection current is subject to Lotus (being illustrated with waved arrow again) is better than the thermic load be subject in the calender shown in Fig. 1 and 2.It is arranged on hard roller 3 The thermic load that the identical soft roller 2 highly gone up is subject to is identical with the thermic load that the soft roller in calender shown in Fig. 2 is subject to.It is arranged on hard The soft roller 4 of roller 3 lower section is subject to few thermic load.Due to two action plane each other shape at an angle of 90, so the phase of roll gap 5,6 Mutually affect minimum, that is, again smaller than the calender shown in Fig. 5.When being entered with different linear forces in seam in other words roll gap 5,6 During row calendering, the flexure being caused by roll gap 5 of heated roller 3 just extend perpendicular to the pressure position of roll gap 6 (otherwise also So).Subsequent occurrences of sweep error very little and negligible (only reducing linear force respectively).

Fig. 4 illustrates a kind of calender 100, wherein the action plane 7,8 of two soft rollers 2,4 and hard roller 3 also shape to each other γ at an angle of 90.Different from the calender of Fig. 3, the rotation axiss 10,11 of two soft rollers 2,4 are arranged on sustained height.Hard roller 3 It is evenly provided on above two soft rollers 2,4.Two action plane are rotated from horizontal line with equal angular on absolute value.Two Individual soft roller 2,4 thus like degree ground are subject to thermic load because of convection current.As in figure 3, the influencing each other of two roll gaps 5,6 Little.Calender shown in Fig. 4 has the optkmal characteristics of all calenders illustrating.

In calender shown in Fig. 3,4 and 5, product breadth 1 is conducted through a roller being made up of hard roller 3 and soft roller Gap, and then turns to around slewing rollers, subsequently passes through the second roll gap, and this roll gap is made up of the second soft roller and same hard roller 3, and The action plane 7,8 of two soft rollers 2,4 and hard roller 3 forms the angle γ less than 180 ° to each other.Fig. 3 and 4 calender in This angle γ is about 90 °.

As clearly visible in Fig. 5, it is of special importance that defect (edge should be made when slubbing 13 such as linear slit passes through calender 100 The product that direct of travel is not flattened) minimum.This determines regulation parameter, the foundation of this regulation parameter and elimination by " quick " (realize and cancel) and two roll gaps 5,6 independence to each other is realizing.The adaptation of regulation parameter and new linear force is got over Little, then linear slit is by faster and have minimum defect.When slubbing 13 such as linear slit is reported, unshowned control in the accompanying drawings Device determines in the case of considering product web speed, and when this slubbing passes through roll gap 5 and roll gap 6.Will lead in slubbing 13 Cross the first roll gap 5 slightly before, so the linear force in this roll gap of reduction is so that slubbing can be in the situation not damaging soft roller plastics facings Pass through down roll gap 5.After this first pass, after i.e. slubbing for the first time passes through a roll gap, the linear force of this roll gap is increased again to Initial value.When slubbing 13 will reach on the second roll gap 6, here also reduces the linear force in this roll gap 6, to reduce slubbing The impact passed through.After this, extruding force is increased again to previous value.Wish here so control roll gap 5,6 so that they Influence each other as little as possible.The movement of the pressure spot causing because of load change on the roller bearing of heated roller 3 in addition should not Lead to the discontinuity of process.90 ° of arrangements as shown in Figures 3 and 4 are very suitable for this, especially when preferably two soft rollers 2,4 During for dancer, because the flexure of dancer is subject to the firm of the hardness steel pipe (hollow roll) of system in other words of design itself Degree limits.In order to reduce the linear force in roll gap for slubbing, need to change multiple pressure parameters in the case of dancer.This flower Time-consuming.Therefore particularly advantageously, in a roll gap, the change of linear force affects another roll gap as small as possible.

In the roller with internal end of travel of plunger rides, roller tube also represents facings and due to roller simultaneously wherein Pipe only has little elastic modelling quantity and need not control extra bending force (not shown in the accompanying drawings), when being passed through by this slubbing Control simpler, because hydraulic pressure (plunger) pressure only need to be changed.The independence here of two roll gaps need not with dancer There is same degree.Disadvantageously, it is difficult to not even based on softer roller tube (there is the roller tube of relatively low modulus of elasticity in other words) Enable the high accuracy (cylindrical shape, circular motion, identical wall thickness) of roller.Although (pipe is curved only to need the little power that arches upward in this soft roller Qu Li), but the arrangement according to the invention of such roller remains favourable because here in order to reduce soft roller heat bear The lower section that soft roller is positioned heated roller 3 as far as possible is also advantageous by lotus.

Reference numerals list

100 calenders

1 product breadth

2nd, 4 soft roller

3 hard rollers

5th, 6 roll gap

7th, 8 action plane

7a, 8a action plane region

The rotation axiss of 9 hard rollers

10th, the rotation axiss of 11 soft rollers

12 slubbing sensors

13 slubbings, such as linear slit

α, β, γ angle

G gravity

H horizontal line

Claims

1. it is used for processing three roller calenders (100) of product breadth (1), including a hard roller (3), described hard roller and two soft rollers (2,4) constitute two roll gaps (5,6) it is characterised in that the action plane (7,8) of described soft roller (2,4) and hard roller (3) to each other It is formed at the angle (γ) between 110 ° and 70 °, wherein, setting slubbing sensor (12), this slubbing sensor detects product width The slubbing (13) in face (1), is provided for detecting device and the control device of product web speed, and described control device is passed by slubbing The value of sensor (12) and product web speed calculate slubbing (13) pass through roll gap (5,6) moment and this moment slightly before this Sample reduces the linear force of corresponding roll gap (5,6) so that slubbing can pass through roll gap (5,6) in the case of not causing damage.

2. calender according to claim 1 is it is characterised in that hard roller (3) is heated.

3. calender according to claim 1 is it is characterised in that the rotation axiss (9) of described hard roller (3) are higher than at least one The rotation axiss (10,11) of individual described soft roller (2,4).

4. calender according to claim 3 is it is characterised in that the rotation axiss (9) of described hard roller (3) are higher than described two The rotation axiss (10,11) of individual soft roller (2,4).

5. the calender according to one of Claims 1-4 it is characterised in that described soft roller (2,4) rotation axiss (10, 11) it is located on sustained height.

6. the calender according to one of Claims 1-4 is it is characterised in that described angle (γ) is 90 °.

7. the calender according to one of Claims 1-4 it is characterised in that described control device so reduce roll gap (5, 6) linear force so that time of being reduced of the linear force of two roll gaps (5,6) not overlapping.

8. the calender according to one of Claims 1-4 is it is characterised in that at least one described soft roller (2,4) is flexure Controlled.

9. calender according to claim 8 is it is characterised in that at least one described soft roller (2,4) is dancer.

10. the calender according to one of Claims 1-4 is it is characterised in that at least one described soft roller (2,4) is to scratch Bent controlled, plunger rides roller, in the case of this roller, roller tube simultaneously constitutes facings.

11. calenders according to claim 10 are it is characterised in that at least one described soft roller (2,4) is with inside The roller of stroke.

12. a kind of for the method by means of three roller calender calendering product breadths, this three rollers calender includes a hard roller (3), described hard roller and two soft rollers (2,4) constitute two roll gaps (5,6), comprise the steps：

- roll gap being made up of hard roller (3) and one of soft roller (2) is passed through in product breadth (1) guiding；

- so that product breadth (1) is turned to around slewing rollers；

- the second roll gap is passed through in product breadth (1) guiding, this second roll gap is by the soft roller of another one (4) and described hard roller (3) Constitute, wherein, the action plane (7,8) of soft roller (2,4) and hard roller (3) is formed at the angle between 110 ° and 70 ° to each other (γ)；

The slubbing (13) that-detection is located in product breadth (1)；

- determine that slubbing passes through the moment of roll gap (5,6)；

- this moment reduce linear force in roll gap (5,6) slightly before respectively so that slubbing (13) can not cause soft roller (2, 4) pass through roll gap (5,6) in the case that facings is damaged；

- improve linear force to initial value.

13. methods according to claim 12 are it is characterised in that the action plane (7,8) of soft roller (2,4) and hard roller (3) Shape angle in 90 ° (γ) to each other.

14. methods according to claim 12 or 13 it is characterised in that the linear force of described two roll gap be reduced when Between not overlapping.