EP1197322A2 - Roller arrangement, particularly for corrugating rolls - Google Patents

Abstract

Roller arrangement (10), especially a corrugated roller arrangement for corrugating a sheet of material (M), e.g. paper or cardboard, comprises at least one first roller (12) with a profile (16) rotating about a first axis of rotation (A), at least one second roller (14) rotating about a second axis of rotation (B) and provided with a complementary profile (28) corresponding to the profile of the first roller, and pressure devices for pressing the first roller and/or the second roller against each other. Stopping devices (20, 22, 34, 36) rolling on each other during operation are provided in at least one axial edge region (24, 26, 38, 40) of the first and/or second roller to determine a minimum distance between the surface of the first roller provided with the profile (16) and the surface of the second roller provided with the complementary profile (28). Independent claims are also included for a method for retrofitting the roller arrangement with stopping devices and a material processing machine equipped with the roller arrangement.

Description

The present invention relates to a roller arrangement, in particular a corrugating roller arrangement for corrugating a Material web, for example made of paper or cardboard.

In paper processing and especially in the production of corrugated cardboard are used in corrugated cardboard machines with corresponding Corrugated rollers provided with corrugated profiling are used to a material web made of paper or cardboard, for example permanently deformable and corrugated. For this, the interacting corrugated rollers are used very high pressures. That's why it happens especially for corrugated rollers with long profiled roller bodies, which are each rotatably supported at their roller ends are to a deflection, so that the pressure in the area the interacting profile sections of the two corrugated rollers become uneven over the length of the corrugated rollers can. To one over the entire length of the corrugated rollers It is known that achieving approximately even line pressure with at least one of the two corrugating rollers with a crown, i.e. it is formed "bulbous". Such a cambered design of the at least However, a corrugated roller has the disadvantage that that of the roller inherent crowning only on a very specific one the crowning coordinated contact pressure for one over the Roll length ensures even contact pressure. Will the contact pressure enlarged or reduced, the crowning leads to an uneven pressure distribution over the Roll length and thus unsatisfactory work results, with the result that either the material web to be processed in the external pressurized Edge areas of the corrugated roller is destroyed or that it is in the edge areas is only insufficiently deformed.

Another factor affecting the work result when used of such a roller arrangement is determined Web width of the material web to be processed. So is with wider material webs, i.e. with greater utilization of the Length of the profiled roller section, usually one greater contact pressure is required than with a smaller one Material web width and thus less utilization of the Length of the profiled corrugated roller. For example, you choose with a small web width of the material web to be processed too high contact pressure, this can on the one hand lead to Destruction of the material web in its outer areas and on the other hand result in the marginal areas the rollers, which are not covered by the material web will touch each other. This can cause damage lead in the edge areas of the profiled rollers, especially when the rollers are sensitive Coating, such as chromium or tungsten carbide, are provided. It is therefore particularly when switching the operation of the roller assembly from machining a material web with a large width for processing the material web with a small width, the contact pressure to precisely match the web width in order to to get a satisfactory work result and around To avoid damage to the roller assembly. such Settings, on the one hand, are time consuming and reduce the production capacity of one with such Roller arrangement equipped machine. on the other hand can incorrect settings of the contact pressure to a Damage to the material web and / or the rollers.

DE 690 08 380 T2 describes a corrugated cardboard machine with a Roller arrangement of the type described in the introduction, where a position limiter to regulate the contact pressure or the distance between the two rollers is provided. However, this prior art does not exist Information about the technical implementation of the position limiter.

Furthermore, a roller arrangement is known from DE 198 05 137 A1, in which two rollers are stored in jewels are, with a spacer between the bearing stones Setting the distance is provided. This solution is structurally very complex because in addition to the technical Precautions to adjust the bearings also in this one Area an adjustable component for distance adjustment must be attached. In addition, in this State of the art proposed solution in hiring the roller distance always the bearing play between the to take into account the respective pair of roller and bearing stone, which makes the distance adjustment prone to errors.

Finally, there are documents DE relating to the prior art 299 20 942 U1, DE 695 03 325 T2 and DE 26 11 325, which are further than the state discussed above of the technique.

It is an object of the present invention to provide a roller arrangement to provide the type described in the introduction, in which a reliable one while avoiding damage to the rollers Setting the minimum distance between the Rolling is possible.

This task is accomplished by a roller arrangement, in particular Corrugating roller arrangement for corrugating a material web, for example made of paper or cardboard, this roller arrangement executed with at least one around a first axis of rotation rotatably mounted first roller with a profiled Surface, at least one mounted around a second axis of rotation second roller with a surface, which with a complementary profiling corresponding to the profiling of the first roller is provided, pressing means for Pressing the first roller and / or the second roller onto one another to, wherein in at least one axial edge region first or / and the second roller rolling on each other during operation Slings are provided, through which a Minimum distance between the profiled Surface of the first roller and the one with the complementary profiling provided surface of the second roller is.

By providing the rolling on each other in operation Slings can thus be prevented from the two interacting rollers when adjusting the contact pressure be brought into a relative position to each other, in which is an "interference" of the rollers at least in their Edge area occurs, which occurs during operation, i.e. with rotating, intermeshing rollers, a mutual contact and destruction of the surface of the corrugated rollers in would result in this edge area. Furthermore, by the provision of slings directly to the Rollers ensure that they are sufficiently large Distance between the profiled surface and that with the Complementary profiling provided surface of the rollers is guaranteed so that damage to the machined Material web can be prevented.

A simple embodiment of the roller arrangement according to the invention arises, for example, when the slings on an adjacent one with the profiling or Complementary profiling provided trained surface unprofiled roller section are formed. At a such a design, it is possible those with profiling or complementary profiling Form roller sections in a conventional manner and the slings independently of the roller sections formed adjacent to these profiled roller sections to form unprofiled roller sections. The End sections can be from trunnions or from roller sections be formed, which has an outer diameter have, which is smaller than the maximum outer diameter of the profiled roller sections and larger than the outer diameter the bearing journal is.

For positioning the lifting gear on the roller section different alternatives are conceivable. That's the way it is for example possible to attach the sling to the section with profiling or complementary profiling directly then arrange. The larger diameter section with profiling or complementary profiling then serves as a one-sided support for the lifting gear, so that a deformation impairing their function becomes.

Alternatively, it is possible to close the slings at a distance the roll section with profiling or complementary profiling to arrange. In this case there can be an interaction between the sling and the profiled Sections of the other roller can be prevented.

As already stated above, regarding dimensioning the sling in a training of Invention provided that the non-profiled roller section has a smaller outside diameter than the outside diameter one that is profiled or with complementary profiling provided surface of the first or second roller enveloping circle in cross-section. This allows an undesirable interaction between slings and profiled or with complementary profiling Prevent the surface of one of the rollers.

In a development of the invention it can be provided that the sling means at least one on a roller of first roller or second roller arranged stop ring include, which over its outer peripheral surface with a corresponding contact surface on the other roller of first roller or second roller in mutual contact stands or can be brought into mutual investment, so that the Stop ring with rotating rollers on a corresponding one Stop ring of the other roller or directly rolls on the other roller. This can be provided be that the corresponding contact surface on the each other roll of first and second roll of one Outer peripheral surface of one of the other roller from the first and second roller arranged further stop ring is formed. So it is possible to mix the two rollers End areas with unprofiled roller sections provided, as already explained above, and subsequently one on each of these unprofiled roller sections Apply stop ring, which together with the corresponding another stop ring on top of the other Roll the minimum distance between the profiled surfaces the first and second rollers. It is fundamental also possible to place the stop rings directly on the bearing journal to arrange. As an alternative to using a stop ring and a corresponding further stop ring can also be provided that the corresponding Contact surface formed on the unprofiled roll end section is. This means that at each end of the roller assembly only one stop ring is provided, and either on the first roller or on the second roller, the stop ring then directly with the unprofiled Roller end section interacts. This is the structure further simplified.

Both alternatives - stop ring with additional stop ring or just a stop ring interacting with unprofiled Roll section - have the advantage, however, that they retrofit existing roller assemblies enable, for example, such that the unprofiled Edge areas or on the journal of the rollers later Stop rings are attached to the one the minimum distance for each type of use of the roller arrangement between the profiled surfaces.

A sufficiently good and even pressure distribution over the entire roller length between the profiled surface the first roller and the one with complementary profiling provided surface of the second roller to ensure can be further provided according to the invention that in axial direction on both sides of the with profiling or counter-profiling provided surface of the first roller or / and the second roller slings are provided.

To connect the respective stop ring with the associated one Roll can be provided that this integrally the roller is formed. Alternatively, it can be provided be that the stop ring is attached separately to the roller is, preferably by screwing or welding. The separate attachment of the stop ring on the Roller finds existing ones especially when retrofitting Roller arrangement application.

As already indicated at the beginning, can be particularly long Rolls to achieve one over the entire roll length uniform contact pressure be provided that at least one of the rollers is convex, i.e. is bulbous. The Bombing is similar to gravity and storage Deformation ("sagging") of the roll in question such that they interact with the each other roller in a certain contact pressure range is largely linear.

The profiling of the respective rollers can be designed as desired his. Such roller arrangements are preferred used in corrugated cardboard manufacture where there is corrugation the material web to be processed is to be reached. Therefore can be provided according to the invention that the profiling or / and the complementary profiling of a corrugation is formed. For sufficiently good work results in particular when processing the material web when the rolls are designed as corrugated rolls one Corrugated cardboard machine, be provided that the minimum distance between the profiled surface of the first roller and the one with the complementary profile Surface of the second roller is smaller than that Thickness of the material web to be processed. Such a design the minimum distance between the two surfaces ensures that the material web is pinched between the rollers, which results in a sufficiently good deformation, in particular Corrugation that results in the material web to be processed. In coordination with those used in the production of corrugated cardboard Material web thicknesses can also be provided according to the invention be the minimum distance in the range of 0.01 mm to 0.30 mm, preferably in the range from 0.02 mm to 0.20 mm, most preferably in the range of 0.03 mm to 0.10 mm lies.

Around the rollers of the roller assembly from corrosion, surface wear due to the interaction with the material web or to protect other environmental influences can according to the invention it can also be provided that the first or / and the second roller at least in its profiled surface area with a coating, preferably made of tungsten carbide or made of chrome.

A: Mindestabstand,

D1: Durchmesser des Hüllkreises um den profilierten Oberflächenabschnitt der ersten Walze,

D2: Durchmesser des Hüllkreises um den mit Komplementär-Profilierung versehenen Oberflächenabschnitt der zweiten Walze, Dr: Außendurchmesser des Anschlagmittels an der ersten Walze;

Da: Außendurchmesser des Anschlagmittels an der zweiten Walze;

Rh: Berg-zu-Tal Abstand der Riffelung beider Walzen.

The following relationship can apply to the dimensioning of the minimum distance A = Rh - [(D1 - Dr) / 2 + (D2 - Da) / 2], where:

A: minimum distance,

D1: diameter of the enveloping circle around the profiled surface section of the first roller,

D2: diameter of the enveloping circle around the surface section of the second roller provided with complementary profiling, Dr: outer diameter of the lifting means on the first roller;

Da: outer diameter of the sling on the second roller;

Rh: mountain-to-valley distance of the corrugation of both rollers.

The invention further relates to a method for retrofitting a roller assembly with slings, comprising the Step attaching the sling, especially with the Lifting device features of the type described above at least one roller of the roller arrangement such that the Sling a minimum distance between a surface the first roller and a surface of the second roller determine.

The invention further relates to a material processing machine, especially corrugated cardboard machine equipped with a Roller arrangement of the type described above.

Figur 1 eine erfindungsgemäße Riffelwalzenanordnung in der Draufsicht;

Figur 2 eine Detailansicht des in Figur 1 mit II bezeichneten Details;

Figur 3 eine Seitenansicht entsprechend der Betrachtungsrichtung III gemäß Figur 2;

Figur 4 eine Ansicht entsprechend Figur 1 einer zweiten Ausführungsform der Erfindung; und

Figur 5 eine Detailansicht des in Figur 4 mit V bezeichneten Bildausschnitts.

Exemplary embodiments of the present invention are explained below with reference to the attached figures. They represent:

Figure 1 shows a corrugated roller arrangement according to the invention in plan view;

FIG. 2 shows a detailed view of the detail designated II in FIG. 1;

Figure 3 is a side view corresponding to the viewing direction III of Figure 2;

Figure 4 is a view corresponding to Figure 1 of a second embodiment of the invention; and

Figure 5 is a detailed view of the image section designated V in Figure 4.

In Figure 1 is a corrugated roller arrangement according to the invention generally designated 10. The corrugating roller arrangement 10 comprises a first corrugating roller 12 and a second corrugating roller 14. The first corrugating roller comprises one with one Surface profiling 16, which is in the form of a corrugation is formed, provided roller body 18. At both ends of the roller body 18 is a stop ring 20, 22 in arranged in the immediate vicinity.

Furthermore, the first corrugated roller comprises 12 journals 24, 26, which in corresponding bearing arrangements 28, 30 for rotatable mounting of the first corrugating roller 12 about its axis of rotation A are included.

Corresponding to the first corrugating roller 12, the second corrugating roller 14 a complementary surface profile 28, which in an effective area 30 with the surface profiling 16 of the first corrugating roller 12 cooperates and which is formed on a roller body 32. both sides of the roller body 32 are acting as stop rings 34, 36 Flanges formed, each in pairs with the stop rings 20 and 22 cooperate on the corrugating roller 12, i.e. roll with the rollers 12 and 14 rotating. The flanges acting as stop rings 34, 36 can for example by flattening, grinding or turning the complementary surface profiling 28 are produced. However, they can also be considered to be adjacent to the Complementary surface profiling 28 on the second corrugating roller 14 attached stop rings can be formed. The second corrugated roller 14 is also with journal 38, 40th provided, which in corresponding bearing arrangements 42, 44 for the rotatable mounting of the second corrugating roller 14 around it Axis of rotation B are included.

If one now turns to the detailed drawings according to FIG. 2 and 3 to, the following can be seen. The stop ring 20 is with a small axial distance x to the roller body 18 arranged, this axial distance x by attaching an undercut can be made. The two corresponding ones Stop rings 20 and 34 on the first corrugated roller 12 and 34 on the second corrugating roller 14 lie above their contact surfaces 42 (on the stop ring 20) and 44 (on the stop ring 34) to each other. The diameter Dr des stop ring 20 provided on the first corrugated roller 12 and the diameter Da of the second corrugating roller 14 provided stop ring 34 are such relative to each other dimension that with mutual contact of the contact surfaces 42 and 44 there is a distance A between surface 46 of FIG Profiling 16 of the first roller 12 and the surface 48 the complementary profile 28 of the second roller 14.

Both profiles are complementary and have a mountain-to-valley distance Rh. The minimum distance A between the two surfaces 46 and 48 is determined as follows when the contact surfaces 42 and 44 are in mutual contact: A = Rh - [(D2 - Da) / 2 + (D1 - Dr) / 2].

This relationship results from an equation which respective distance of the two axes of rotation A and B from the first Roller 12 and second roller 14 describes, once expressed about the diameters Dr and Da of the stop rings 34 and 36 as well as expressed in terms of diameter D1, D2, the distance Rh and the minimum distance A of the profiling 16 and complementary profiling 28. It should be noted that when training one of the two corrugated rollers as a cambered roller, the spacing of the profiling and complementary profiling in the middle area of the rolls is smaller than in their outer areas and in the middle Range can be reduced to almost zero.

Figures 4 and 5 show a second embodiment of the present invention.

To explain this second embodiment the same reference numerals for the same or equivalent components as used in the first embodiment, however followed by an apostrophe ('). To avoid Repetitions are just the differences between the two Corrugated roller arrangements 10 according to FIGS. 1 to 3 and 10 'according to Figures 4 and 5 described.

The corrugated roller arrangement 10 'differs from that Corrugated roller arrangement 10 only in the configuration of the Slings. Adjacent to the one with the surface profiling 16 'provided roll body 18' are unprofiled on both sides Roll sections 50 ', 52' formed. To this unprofiled roller sections 50 'close the journal 24 'and 26'. On the unprofiled roller sections 50 ', 52' are each approximately in the middle in an axial Distance x 'from the roller body 18' the stop rings 20 ' and 22 '.

On the second corrugated roller 14 'are also adjacent to the roller body 32 'unprofiled roller sections 54' and 56 'arranged, on each of which the bearing pin 38' and connect 40 '.

With a set minimum distance A between the surface profiling 16 'and the complementary surface profiling 28 ', as shown in FIG. 5, the stop ring 20' with its contact surface 42 'on the counter contact surface 44' of the unprofiled roller section 54 '. The same applies to the situation not shown in Figure 5 in the area of Stop ring 22 '.

The minimum distance A is calculated in accordance with the above relationship given to the first embodiment.

In operation, a material web M or M 'runs through the area 30 or 30 'and there is a deformation, in particular Corrugation, by the two corrugating rollers 12th or comb 12 'and 14 or 14' together. Granted the minimum distance A on the one hand that the material web is not due to excessive contact pressures of the two corrugated rollers 12 and 14 is destroyed, and on the other hand that the corrugated rollers 12 and 14 in a not covered by the material web M. Do not touch the edge area and by such a touch to be damaged.

It should be noted that the corresponding Slings during operation, i.e. when meshing with each other Corrugated rollers, each rolling on top of the other. This means, that in the first embodiment, the stop rings 20 and 34 and the stop rings 22 and 36 roll on each other. For the second embodiment, this means that the Stop ring 20 'and the roller section 54' and the stop ring 22 'and the associated roller section 56' one on top of the other roll. By forming the sling A reliable distance adjustment can be made directly on the rollers independent of other components, such as of bearing components.

Claims (19)

Roller arrangement, in particular corrugated roller arrangement for corrugating a material web (M), for example made of paper or cardboard, this roller arrangement (10; 10 ') executed with: at least one first roller (12; 12 ') rotatably mounted about a first axis of rotation (A; A') with a profiled surface (16; 16 '); at least one second roller (14; 14 ') rotatably mounted about a second axis of rotation (B; B') with a surface (48) which is provided with a profile (16; 16 ') of the first roller (12; 12') corresponding complementary profiling (28; 28 ') is provided; and Pressing means for pressing the first roller (12; 12 ') and / or the second roller (14; 14') towards one another:
characterized in that in at least one axial edge region (24, 26, 38, 40; 50 ', 52', 54 ', 56') of the first and / or the second roller (12, 14; 12 ', 14') Operation of rolling-on stop means (20, 22, 34, 36; 20 ', 22', 54 ', 56') is provided, by means of which a minimum distance (A) between the surface (46; 16 ') provided with the profiling (16; 16') is provided ) of the first roller (12; 12 ') and the surface (48) of the second roller (14; 14') provided with the complementary profile (28; 28 '). Roller arrangement according to claim 1,
characterized in that the stop means (20, 22, 34, 36; 20 ', 22', 54 ', 56') each on an adjacent one with profiling (16; 16 ') or complementary profiling (28; 28') provided surface (46, 48) formed non-profiled roller section (24, 26, 38, 40; 50 ', 52', 54 ', 56') are formed. Roller arrangement according to claim 2,
characterized in that the stop means (20, 22, 34, 36) directly adjoin the roller section (18, 32; 18 ', 32') provided with profiling (16, 16 ') or complementary profiling (28; 28') , Roller arrangement according to claim 2,
characterized in that the stop means (20 ', 22') are arranged at a distance from the roller section (18 ') provided with profiling (16') or complementary profiling (28 '). Roller arrangement according to one of claims 2 to 4,
characterized in that the non-profiled roller section (50 ', 52', 54 ', 56') has a smaller outer diameter than the outer diameter (D1, D2) of a surface (46, 48) of the first and second rollers (12, 14; 12 ', 14') enveloping circle in cross-section. Roller arrangement according to one of claims 1 to 5,
characterized in that the stop means comprise at least one stop ring (20, 22, 34, 36; 20 ', 22') arranged on a roller of the first roller (12; 12 ') or second roller (14; 14'), which over its outer circumferential surface (42; 42 ') is in mutual contact with a corresponding contact surface (44; 44') on the other roller of the first roller (12; 12 ') or second roller (14; 14') or can be brought into mutual contact is. Roller arrangement according to claim 6,
characterized in that the corresponding contact surface (44; 44 ') on the respective other roller of the first roller (12; 12') and second roller (14; 14 ') has an outer peripheral surface (44) on the other roller of the first Roller (12; 12 ') and second roller (14; 14') arranged further stop ring (34) is formed. Roller arrangement according to claim 6,
characterized in that the corresponding contact surface (44 ') is formed on the non-profiled roller section (54', 56 '). Roller arrangement according to one of the preceding claims,
characterized in that in the axial direction on both sides of the surface (46, 48) provided with profiling (16; 16 ') or complementary profiling (28; 28') of the first roller (12; 12 ') and / or the second roller ( 14; 14 ') stop means (20, 22, 34, 36; 20', 22 ', 54', 56 ') are provided. Roller arrangement according to one of claims 6 to 9,
characterized in that the stop ring (20, 22, 34, 36; 20 ', 22') is integrally formed on the roller (12, 14; 12 ', 14'). Roller arrangement according to one of claims 6 to 9,
characterized in that the stop ring (20, 22, 34, 36; 20 ', 22') is attached separately to the roller (12, 14; 12 ', 14'), preferably by screwing or welding. Roller arrangement according to one of the preceding claims,
characterized in that at least one of the rollers (12, 14; 12 ', 14') is cambered. Roller arrangement according to one of the preceding claims,
characterized in that the profiling (16; 16 ') and / or the complementary profiling (28; 28') is formed by corrugation. Roller arrangement according to one of the preceding claims,
characterized in that the minimum distance (A) is smaller than the thickness of the material web (M; M '). Roller arrangement according to one of the preceding claims,
characterized in that the minimum distance (A) is in the range of 0.01 mm to 0.30 mm, preferably in the range of 0.02 mm to 0.20 mm, most preferably in the range of 0.03 mm to 0.10 mm lies. Roller arrangement according to one of the preceding claims,
characterized in that the first and / or the second roller (12, 14; 12 ', 14') is provided with a coating, preferably made of tungsten carbide or chromium, at least in its profiled surface area (18, 32; 18 ', 32'). Roller arrangement according to one of the preceding claims,
characterized in that the minimum distance is determined according to the relationship: A = Rh - [(D2 - Da) / 2 + (D1 - Dr) / 2], where: A: Minimum distance Rh: mountain-to-valley distance of the profiling D1: diameter of the enveloping circle around the profiling of the first roller D2: diameter of the enveloping circle around the complementary profiling of the second roller Dr: outer diameter of the stop means assigned to the first roller and Da: outer diameter of the sling means assigned to the second roller. Method for retrofitting a roller arrangement (10; 10 ') with slings, in particular a roller arrangement according to one of claims 1 to 17, comprising the step: Attaching the sling, especially with the sling characteristics according to one of the preceding claims at least one roller (12, 14; 12 ', 14') of the roller arrangement (10; 10 '), such that a by the sling Minimum distance between a profile (16; 16 ') of the Surface of the first roller (12; 12 ') and a complementary profile (28; 28 ') the surface of the second roller (14; 14 ') is determined. Material processing machine, in particular corrugated cardboard machine, equipped with a roller arrangement after a of claims 1 to 17.

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