EP1080876A1 - Device for embossing a material web - Google Patents

Abstract

An embossing roller assembly, comprises raceways at both ends of the roller bodies to slide within ring holders in a conical structure to set the embossing gap between the rollers with precision The raceways (3) have a conical inner ring drilling (31). The embossing roller (1), held by the raceways (3), has ring holders (11) between the roller body (10) and the journals (12) with a conical ring seat (110), to take an inserted raceway (3) with its radially expanding ring drilling (31) as it slides in. The outer diameter of the raceway (3) varies, according to the depth of insertion on the ring seat (110). The conical ring seat (110) has an increasing diameter from the side towards the journal (12) inwards, towards the roller body (10). Pressure rings (6) hold the raceways (3) in position at their ring holders (11). Each pressure ring (6) is placed at the side of a raceway (3) pushed into the ring holder (11), together with a screw locking ring and setting screws (7) for positioning in relation to the ring holder (11). Each pressure ring (6) has a sprung support against the ring holder (11). A ring groove (13) is near each ring seat (110), linked to a channel leading axially from the journal (12) for connection to a pressure supply. Both embossing rollers (1,2) have raceways (3) at both ends of their roller bodies (10,20) rolling against each other, with the embossing gap (P) between the rollers to act on the web.

Description

The invention relates to a device for embossing a material web, containing two embossing rollers with roller balls, between which one Embossing gap is formed for the passage of the material web, the Embossing rollers can be rotated on both sides by means of axial bearing journals Device are stored and adjusting means are provided, by means of which the axial distance between the embossing rollers is variable, so that the Embossing gap between the rolls of the same in its clear width is adjustable.

In the case of embossing systems for embossing a web of material with an embossing gap need to work, such adjusting means for adjusting the Nip required. Such stamping systems usually consist of a pair of steel rollers, d. H. the embossing roller and also the other as The embossing roller serving as the counter roller is made of steel.

a) Das Prägen mit Unionwalzen, bei denen das zu prägende Material zwischen einer positiv und einer negativ gravierten Prägewalze, die genau zueinander eingestellt sind, verformt wird.

b) Das Prägen mit Zwillingswalzen, wobei die zu prägende Materialbahn zwischen zwei positiv gravierten Walzen, deren Gravuren sowohl aufeinander als auch ineinander eingestellt werden können, geprägt wird.

c) Das Prägen

Punkt auf Punkt", wobei ebenfalls zwei positiv gravierte Prägewalzen verwendet werden. Diese Prägewalzen werden so eingestellt, daß die jeweils positiv gravierten Elemente zueinander stehen. Die zu prägende Materialbahn wird zwischen den positiv zueinander stehenden Punkten geprägt.

d) Das Prägen Punkt gegen Fläche", wobei eine Walze positiv graviert und die entsprechende als Gegenwalze dienende zweite Prägewalze glatt ausgebildet ist. Die zu prägende Materialbahn wird hierbei einseitig mit der positiv gravierten Prägewalze gegen die glatte Prägewalze geprägt.

Various designs of the embossing rollers are known from the prior art, which can be roughly divided into four main groups:

a) Embossing with union rollers, in which the material to be embossed is deformed between a positively and a negatively engraved embossing roller, which are precisely adjusted to one another.

b) Embossing with twin rollers, the material web to be embossed being embossed between two positively engraved rollers, the engravings of which can be set both on and inside one another.

c) Minting

Point to point ", whereby two positively engraved embossing rollers are also used. These embossing rollers are set in such a way that the positively engraved elements are in relation to each other. The material web to be embossed is embossed between the positively opposing points.

d) Minting Point against surface ", one roller being positively engraved and the corresponding second embossing roller serving as counter-roller being smooth. The material web to be embossed is embossed on one side with the positively engraved embossing roller against the smooth embossing roller.

All of the above systems require adjustability of the Embossing gap to adjust this to the material to be processed can or if necessary due to wear or material changes To be able to adjust the embossing gap.

The invention explained below is basically applicable to all of the aforementioned main groups of types of embossing, but embossing Point to point "and Point vs. Surface "are the main applications.

The embossing rollers are usually by means of spherical roller bearings and Bearing stones in a so-called roller frame or cassette within the Device led to each other.

For the stamping operation, it is necessary that the stamping rollers are axial, some are also aligned radially to each other. This is through the Bearing stones in connection with the roller frame or cassette of the Device as well as partially via a radial setting via gears mounted on the trunnion. In addition, the so-called Embossing gap between the roller bales of the embossing rollers are set, d. H. the embossing rollers are at a precisely defined distance adjusted to each other. This distance is necessary so that the one to be embossed Material web is not embossed, the exact embossing height is reached and do not wear the rollers prematurely due to accidental contact.

A known adjusting device for adjusting the embossing gap is based on a riving knife adjustment with a more or less far into one Gap driven wedge, the other adjusting device has one fixed threaded bolt and a so-called gap adjusting nut. This two aforementioned adjustment devices are always between the Bearing housings of the rollers arranged.

Such known adjustment devices have the essential, however Disadvantage that the necessary internal clearance, for example for storage the spherical roller bearings used as well as all others Positioning games for a remaining game of storage of at least 0.05 to 0.1 mm. This remaining game then leads in the minting operation that the embossing rollers move to each other unintentionally and uncontrolled, whereby the clear width of the embossing gap is always changed. These movements are the more pronounced, the greater the different load changes within an embossing system occur, this is e.g. B. the case with so-called Format embossing rollers, such as B. for embossing handkerchiefs or Napkins can be used. With these products there are several layers Tissue material embossed together so that the individual layers stick together. The embossing rollers used for these products have usually between 2 and 20 formats per roll, i.e. H. at a e.g. B. 16-format embossing roller are 5 engraving strips in Longitudinal direction, i.e. around the embossing roller and 16 engraving strips in Cross direction. Each time the layers are stamped with one in the transverse direction running engraving strips increases the printing area in the Embossing operation on a multiple of the printing area of the engraving strips in Longitudinal direction, depending on the arrangement, number and size of formats. Due to the extreme, constantly changing pressure force the embossing rollers vibrate within the remaining internal clearance, d. H. the embossing rollers undesirably dodge each crossbar. Around It is therefore to keep this avoidance within reasonable limits necessary to set the embossing pressure higher than that for embossing the Longitudinal engraving is necessary, which increases wear and tear the embossing result deteriorates.

DE 297 16 031 describes an adjusting device for a pair of rollers known in which the adjusting devices in one of the pivot bearings of the Embossing rollers spaced area are formed to not only one effect precise setting of the embossing gap, but beyond also the remaining internal clearance in the pivot bearings, which is responsible for the undesired Dodging the embossing rollers in the embossing operation is responsible, too eliminate.

A device for embossing a material web, in which the embossing rollers roll with so-called bearer rings as races, is in the DE 198 14 009 C1 described. The races of both embossing rollers are at their respective, the common unwind point diametrically opposite area supported on support rollers, which in turn with manual adjustment devices are provided. About these Adjustment devices can be the distance between the races and so that the pressure generated at the unwind point can be changed so that the Embossing rollers can be preloaded against each other and the embossing result can be influenced. However, such an attitude develops difficult because they have to be manually operated on a large number of setting wheels must be made and used by the Adjustment devices a precise adjustment based on the existing Residual play in the known device is not achievable. Furthermore is the known device due to its complex mechanics cost-intensive and noticeable about closures.

The object of the invention is a device for embossing To propose material web, in the simplest possible way exact setting of the embossing gap can be made and moreover, the internal clearance in the rotatable bearing of the embossing rollers serving pivot bearings is eliminated to avoid the embossing rollers to prevent in the stamping operation. In addition, the aim of the Device to be proposed according to the invention can be produced with high precision.

This object is achieved by designing a device for embossing a material web according to the characteristic features of the Claim 1 solved.

Advantageous refinements and developments of the invention are in the Subclaims specified.

To achieve the object, the invention proposes that the Races have a cylindrical outer surface and a conical inner Have ring bore and the embossing roller receiving the races on both sides between roller balls and bearing journals with corresponding Ring recordings is formed with a conical ring seat, on which the Races with their conical ring bore with radial expansion are slidable and the outer diameter of the races depending is changeable by the degree of being pushed onto the ring seat.

In this way it is possible to adjust the outer diameter the races the distance between the embossing rollers and thus the clearance Width of the remaining between the roll bales of the embossing rolls To be able to set the embossing gap.

The races are manufactured so that they correspond in diameter the expected embossing gap are thicker or thinner than that Embossing rollers. The embossing rollers are then embossed with the required embossing pressure pressed against each other, the races of roll one embossing roller onto the surface of the other embossing roller and the embossing zones on the roller bales of the embossing rollers are contactless, by leaving the embossing gap between the two roll bales. Because of this Pressing the embossing rollers together becomes the bearing play of the bearings the embossing rollers are also completely eliminated against the printing direction, d. H. under pressure, the entire system is free of play, although the necessary one Bearing clearance in the bearings rotatably supported by the embossing rollers for relief Page still exists. This will cause vibrations manufacturing-related play and / or load changes when changing longitudinal and Cross embossing within the embossing gap is switched off, which is reflected in a high uniformity of the embossed material web obtained and low wear of the device.

Depending on the embodiment and application, it can be provided that only to form an embossing roller with races that immediately open the roll barrel of the second embossing roll serving as a counter roll unroll or both embossing rollers are designed with races that roll each other off each other. In both cases the Embossing zones, d. H. the area of the surface profiling Roll bales contactless, namely between the roll bales of Embossing gap is formed.

If the embossing gap is to be enlarged or reduced, it is only necessary to change the outer diameter of the races, causing a shift of one or both embossing rollers to that effect is caused that the center distance of the two embossing rollers to each other changed. This also creates the embossing gap between the roll bales set in its clear width.

To change the outer diameter of the races proposed that this have a cylindrical outer surface and a conical have inner ring bore and the receiving the race Embossing roller on both sides between the roll barrel and the bearing journal corresponding ring receptacles with a conical ring seat is on which the races with their conical ring bore under radial Widening can be pushed on, so that the outer diameter of the races changeable depending on the degree of sliding onto the ring seat is. Thus, the outer diameter of the races can be easily be changed in that the race with more or less strong its conical inner ring bore on the conical ring seat of the Ring holder is pushed on. The further the race on the conical Ring seat of the ring holder is pushed on, the stronger its Widening, which results in an increase in its outside diameter precipitates. Likewise, by pulling the race from the conical Ring seat of the ring seat in the opposite direction also a reduction of the outer diameter of the races due to the correspondingly smaller degree of expansion thereof will be effected.

The conical ring seats of the ring holders are advantageous in this way arranged that it from its end facing the journal to Roll bales have an increasing diameter.

To keep the races permanently in the desired position on the conical To fix the ring seat of the ring receptacle, what a certain desired Corresponds to the outer diameter of the races, it is proposed that Pressure rings are provided, by means of which the races are in their position the respective ring holder can be determined. These pressure rings can for example, laterally on one pushed onto the ring holder Race are created and then by means of in the ring holder screw-in locking and adjusting screws connected to this become. These locking and adjusting screws can also be used Adjustment of the outer diameter of the races, by screwing it more or less far into the ring seat be and along the race pushed onto the ring holder of the conical ring seat slide on or slide until the desired outer diameter is reached. Everyone is advantageous here Pressure ring resiliently supported against the ring receptacle, what for example by appropriate, between the pressure ring and the ring holder arranged in the area of the locking and adjusting screws Disc spring assemblies can be effected.

It is also possible to use hydraulic drive elements or the same to act on the pressure rings to the in the aforementioned sense Vary the position of the race rings.

Since the races when pushed onto the conical ring seat of the If the ring receptacle experiences a widening, these are seated under a press fit the conical ring seat. To this press fit for the purpose of adjustment and Change the position of a race on the ring seat and thus one Temporary change in the outer diameter of the race To be able to overcome, it is proposed that in the area of each ring seat a circumferential annular groove is provided which is axially from the Bearing led out channel for the connection of a pressure source communicates. For example, one can be attached to the channel as a pressure source Serving oil pressure pump can be connected via the oil channel below high pressure in the circumferential ring groove. The one in the ring seat mounted race is then temporarily according to the applied oil pressure expanded and can in the axial direction on the conical ring seat pushed on or subtracted from this are, depending on the required change in the outer diameter of the Race. After the desired position on the ring seat from Race has been taken, the pressure source is switched off and the resulting temporary expansion of the race lifted, which means that it opens again in the desired position the conical ring seat of the ring holder clamped under a press fit.

The races are advantageously made of hardened steel, so that they can be operated with little wear even with high embossing pressure can.

Figur 1

in schematisierter und teilweise geschnittener Darstellung die Ansicht auf zwei Prägewalzen der erfindungsgemäßen Vorrichtung,

Figur 2

die Seitenansicht des Walzenpaares gemäß Pfeil V in Figur 1,

Figur 3

die Einzelheit X gemäß Figur 1 in vergrößerter Darstellung,

Figur 4 und 5

die Verstellung des Prägespaltes zwischen den Prägewalzen,

Figur 6

in schematisierter Darstellung den Kraftverlauf im Prägebetrieb bei der erfindungsgemäßen Vorrichtung,

Figur 7

in schematisierter Darstellung eine mögliche Ausführungs-form der Prägezonen der in der erfindungsgemäßen Vorrichtung einsetzbaren Prägewalzen,

Figur 8

in schematisierter Darstellung die Verstellung des Prägespaltes.

The further structure and in particular the setting of the embossing gap in the device according to the invention is explained in more detail below using an exemplary embodiment in the drawing. Show it:

Figure 1

in a schematic and partially sectioned view the view of two embossing rollers of the device according to the invention,

Figure 2

the side view of the pair of rollers according to arrow V in Figure 1,

Figure 3

the detail X according to Figure 1 in an enlarged view,

Figures 4 and 5

the adjustment of the embossing gap between the embossing rollers,

Figure 6

a schematic representation of the force profile in the stamping operation in the device according to the invention,

Figure 7

a schematic representation of a possible embodiment of the embossing zones of the embossing rollers which can be used in the device according to the invention,

Figure 8

the adjustment of the embossing gap in a schematic representation.

Figures 1 and 2 show the essential part of a device for Embossing a material web, namely two forming a pair of rollers Embossing rollers 1, 2.

The embossing rollers 1, 2 each have a roller bale 10, 20 and are provided on both sides of the roll barrel 10, 20 bearing pins 12, 22 in pivot bearings 4, for example spherical roller bearings and corresponding bearing housing 5 rotatably mounted in the device. On the roller bales 10 and / or 20 can be provided according to the Embossing a surface profiling applied in the to embossing material web is embossed.

For this purpose, the two embossing rollers 10, 20 with their respective central axes M1 and M2 are rotatably supported relative to one another in the device such that between the roll bales 10, 20 a with reference symbol P marked embossing gap remains, through which the to be embossed Material web when the embossing rollers 1, 2 rotate about their central axes M1 and M2 pulled through in a known manner and according to the Surface profiling is embossed on the roll bales 10 and / or 20.

For the embossing result, the inside width W of the embossing gap P is d. H. the remaining free space between the roll bales 10, 20 of the Embossing rollers 1, 2 are of crucial importance and must be individual can be set.

For this purpose, the embossing roller 1 is on both sides of its roll barrel 10 Ring receptacles 11 are formed, to which in the axial direction Center axis M1 continued the journals 12 for the rotatable mounting Connect the embossing roller 1.

Races 3 with a press fit are pushed onto these ring receptacles 11, that on the embossing roller 2 in the area marked with reference number 200 unroll the roller bale 20.

As can be seen in particular from the enlarged illustration according to FIG. 3 results, the races 3 have a cylindrical outer surface 30, which serves as a tread and on the one marked with reference number 200 Roll off the area of the roll barrel 20 of the embossing roll 2. The roller bale 20 of the embossing roller 2 is consequently of a greater width than that Roll bales 10 of the embossing roller 1 formed, namely according to the Width of the races 3 additionally applied to the embossing roller 1.

The races 3 have a larger outer diameter than that Roll bale 10 of the embossing roller 1, so that when rolling the race 3 on the surface of the roll barrel 20 of the embossing roll 2 between the Roll roll 20 and roll roll 10 of embossing roll 2 and 1 of Embossing gap P with the desired clear width W remains.

The illustration according to FIG. 3 also shows that the Receiving the race 3 serving ring receptacle 11 a conical Has an outer surface which forms a conical ring seat 110, the diameter of the conical ring seat 110 of the Bearing pin 12 on the side facing the roll barrel 10 rising is trained.

Accordingly, the race 3 also has an inner ring bore 31 on the corresponding to the conical ring seat 110 of the ring seat 11th also conical and with the same slope as the ring seat 110 is trained.

The race 3 is in its position shown in Figure 3 on the Ring receptacle 11 fixed by a pressure ring 6, which on the Roll bale 10 facing end face 32 of the race 3 on this abuts and can be screwed into the ring receptacle 11 by means of several Fastening and adjusting screws 7 is attached to this. In addition is in the area of each fastening and adjusting screw 7 Disc spring package 8 in a corresponding the fastening and Adjustment screw 7 surrounding recess provided, by means of which Pressure ring 6 resilient with respect to the ring seat 11 of the embossing roller 1 is supported.

In addition, the race 3 is dimensioned in its manufacturing dimensions so that it is clamped on the ring seat 11 in the area of its conical ring seat 110 is shrunk d. H. when sliding onto ring seat 110 a radial expansion with appropriate enlargement of his original outer diameter.

In the representation according to FIG. 3, one can also recognize further ones Details of the bearing housing 5 for receiving the spherical roller bearings 4, namely a seal 50 for sealing against the bearing pin 12 and a bearing cover 51.

It is now essential that the embossing roller 1 according to arrow F in the embossing operation the embossing roller 2 is placed under pressure, but only the Races 3 on both sides of the roll barrel 10 on the with the reference number 200 unroll marked areas of the race 20 of the embossing roller 2, however, the embossing gap P remains between the races 10, 20.

As can also be seen in more detail from FIG this training in the clearance and the resulting game in the spherical roller bearings 4 for the rotatable mounting of the embossing rollers 1 and 2 completely turned off. When pressing the embossing roller 1 according to arrow F in Figure 3 on the surface of the embossing roller 2 namely on the Spherical roller bearings 4 acting on the bearing housing 5 compressive forces K1 and K2 completely by the support forces K3 and K4 between the Races 3 of the embossing roller 1 and the roll barrel 20 of the embossing roller 2 canceled, which makes the entire system free of play, but the for the Bearing function necessary bearing clearance in the relieved area of the bearing 4 remains.

This causes fluctuations in production and thereby caused vibrations avoided.

FIG. 7 also shows a typical representation in a simplified representation Arrangement of longitudinal embossments 100 and transverse embossings 101 from Embossing rollers 1 and 2 are shown on the roller bales 10, 20 of the Embossing rollers 1, 2 can be applied to, for example, several layers Connect tissue to each other. Here, the representation of the Races 3 are omitted for the sake of simplicity. Usually it is always problematic if transverse embossments 101, 102 in the area of the embossing gap P meet, since in this case the pressure forces in the embossing gap P briefly significant compared to the otherwise due to the longitudinal embossing 100, 200 prevailing pressure forces increase. Due to the previously explained with reference to Figure 6 elimination of Internal clearance and the remaining play in the spherical roller bearings 4 for storing the Embossing rollers 1, 2 are used in the device shown in the figures however, such emigration of the embossing rollers 1, 2 is reliable prevents since the storage of the embossing rollers 1, 2 is always free of play.

Depending on the application, it is now necessary to adjust the clear width W des Embossing gap P between the roller bales 10, 20 of the embossing rollers 1, 2 too Change what is now based on the schematic representation in Figures 4, 5 and 8 is explained in more detail.

For example, the embossing gap P between the roll bales 10 and 20 of the To reduce embossing rollers 1, 2 is based on that in FIG. 3 shown state and the position of the race 3 on the 4, the pressure ring 6 by loosening the screwed into the ring receptacle 11 and Adjusting screws 7 loosened. Due to the resilient support on the Disc spring assemblies 8 is thus the pressure ring 6 according to arrow P1 in the Representation according to Figure 4 moved to the right when the adjusting screws 7 are solved, which is between the pressure ring 6 and this facing end 32 of the race 3 forms a gap S1. Since the Race 3 is shrunk onto ring seat 110 of ring receptacle 11, this remains initially in the position shown.

However, as can still be seen from the illustrations, is in the area of Ring seat 110 is provided a circumferential annular groove 13 with an axial led out of the journal 12 and here only schematically indicated channel 15 communicates for the connection of a pressure source. It is thus possible to connect to the channel 15 by means of suitable connection elements to connect a pressure source, for example an oil pressure pump, the oil with very high pressure in the circumferential annular groove 13 of the ring seat 110 promotes. This high oil pressure within the annular groove 13 expands the on the ring seat 110 race 3 temporarily slightly, so that the press fit on the ring seat 110 is lifted and the race 3 as shown in Figure 5 by the width of the gap S1 between Pressure ring 6 and race 3 jumps to the right according to arrow P2 until whose end face 32 comes to rest on the pressure ring 6. Then the high oil pressure applied to the annular groove 13 can be canceled again be and the race 3 lies under the press fit to the ring seat 110 of the ring receptacle 11, but by the amount of the width of the Gap S1 has been withdrawn from the conical ring seat 110. Subsequently is caused by the conical ring seat 110 of the ring receptacle 11 Widening of the race 3 less and the race 3 pulls in Direction of arrow T together radially inwards, whereby the Outside diameter of the cylindrical serving as rolling surface Shell surface 30 is reduced. As a result, this reduction the outer diameter of the race 3 a reduction in the clear Width W of the nip P and thus an adjustment thereof, since the embossing rollers 1, 2 now have a smaller center distance when Unroll each other.

This principle is shown in a simplified schematic form in FIG. 8 shown again.

In the initial state, the embossing roller 1 is shown in the illustration 8, only the central axis M1 is shown, and the embossing roller 2 arranged with its central axis M2 such that the race 3 with its cylindrical outer surface 30 rolls on the roll barrel 20. Around the embossing gap P between the roll bales 10, 20 of the embossing rolls 1, 2 to reduce, the race 30 with its conical ring bore 31st subtracted from the conical ring seat 110 of the ring receptacle 11, d. H. in the Representations shifted to the right according to arrow P1, which is achieved by loosening the the pressure ring holding locking and adjusting screws 8 is effected.

By pulling the race 3 from the conical ring seat 110 Ring receptacle 11, the expansion of the race 3 is reduced, whereby whose outer diameter A when moving in the direction of arrow P1 to one reduced outer diameter A 'is reduced by the displacement in the direction of arrow P1 and the slope or inclination of the conical Ring receptacle 110 and the corresponding wall 31 of the conical Ring bore of the race 3 is dependent. Because of this decreased Diameter A 'of the race 3, which is also shown in FIG Race 3 shown in dashed lines can be seen, the race 3 rolls continue on the roll barrel 20 of the embossing roll 2, but the Embossing roller 2 shifted less far, so that accordingly Displacement P3 of the embossing roller 2 sets, in consequence of which the central axis M2 into that shown with M2 'and closer to the central axis M1 Position is shifted. Accordingly, the roll barrel 20 the embossing roller 2 in the position shown in dashed lines according to arrow P3 shifted, which ultimately reduces the clear width W des Embossing gap P between the roll barrel 10 and the roll barrel 20 is effected.

Likewise, it is also possible in the opposite way to close the nip P. enlarge, namely by the race 3 against the direction of arrow P1 is pushed onto the conical ring seat 110 of the ring holder 11, which enlarges its expansion and ultimately this in one enlarged outer diameter, causing the embossing roller 2 shifted in the direction of the arrow P3 and the embossing gap P is enlarged.

It is essential in the embodiment shown in FIGS. 3 to 5 it now that the setting of the embossing gap in a simple manner with high Precision can be made. According to the angle of inclination α of the conical ring seat 110 of the ring seat 11 can namely for the adjustment of the embossing gap P required displacement of the Race 3 on the conical ring seat 110 of the ring holder 11 exactly to calculate. If the conical ring seat 110 of the ring receptacle 11 for example, has a slope of 1:10, so for the adjustment the clear width W of the embossing gap P by a shift of 1/10 mm Race 3 in the axial direction according to arrow P1 or against arrow P1 around exactly 1 mm necessary. So you can due to the slope of the conical Ring seat 110 of the ring holder 11 the exact required Displacement of the race 3 for the desired change in Calculate the embossing gap.

With a desired reduction in the clear width of the embossing gap P is thus first the pressure ring 6 by loosening the fuse and Adjusting screws 7 and under pressure of the plate spring assemblies 89 so far Arrow direction P1 moves away from the race 3 until a gap width D1 sets the desired displacement of the race 3 corresponds to the slope of the conical ring receptacle 110. After expanding the race 3 using high oil pressure in the ring groove 13 this jumps according to arrow P2 in FIG. 5 by the set gap width D1 until renewed contact with the race 6, so that an exact shift of the race 3 according to the set displacement Gap width D1 is effected.

It is also possible to increase the clear width of the Set the embossing gap P exactly. In this case, the 5 initially shows the gap S2 between the Roll bale 10 facing end face 33 of the race 3 and Face 14 of the roll barrel 10 measured and the race 3 through Applying a high oil pressure in the circumferential annular groove 13 expanded. Subsequently, by tightening the locking and adjusting screws 7 via the pressure ring 6 of the race 3 thus released Direction of arrow P2 more strongly on the conical ring seat of the ring seat 11 be pushed on until the gap S2 increases by one desired dimension, corresponding to the exact displacement, reduced has been. The oil pressure from the circumferential annular groove 13 removed and the shifted race 3 sits in the direction of arrow T Clamping radially inwards onto the conical ring seat 110 of the Ring receptacle 11, whereby it is postponed in accordance with the Position on the conical ring seat 110 undergoes a greater expansion and thus one corresponding to the slope of the conical ring seat 110 has increased outer diameter, whereby the embossing gap P in its clear width W has been increased to the desired extent.

The embossing gap can therefore be readjusted as follows sum up:

At the end of the journal 12 is connected to a corresponding connection an oil pressure pump installed.

Now for a reduction of the embossing gap the safety and Adjusting screws 7 of the pressure ring 6 loosened, which between the Pressure ring 6 and the ring seat 11 disc springs located Push the pressure ring 6 away from the race 3 and so resulting gap S1 between race 3 and pressure ring 6 exactly by means of a measuring instrument, e.g. B. Spy can be determined. The Pressure ring 6 is now at such a distance D1 from race 3 moves exactly the desired displacement of the race 3 corresponds.

Now the race 3 via the annular groove 13 from the oil pressure pump If pressure is set and expanded by the applied pressure, it releases and jumps to the new ring on the pressure ring 6 around the set Amount from the conical ring seat 110 of the ring holder 11.

Now the pressure in the annular groove 13 is released and the Locking and adjusting screws 7 checked for tight fit. The race now has a reduced diameter that is exactly the desired one Reduction of the inside width W of the embossing gap P corresponds.

This process is repeated on the opposite race 3 Embossing roller 1 accordingly.

If the embossing gap P is to be enlarged, the races 3 are like described also pressured and widened, however the pressure rings 6 are not loosened, but via the securing and Adjusting screws 7 tightened further. The race 3 thus moves in Direction on the roll barrel 10, and the calculated measure for the In this case, the gap is enlarged at the gap S2 between the raceway 3 and roll barrel 10 measured.

In this way, a play-free mounting of the embossing rollers 1, 2 with elimination of the residual play due to internal clearance as well as one allows particularly easy adjustment of the embossing gap. The This is made possible by the construction explained above in the drawings further, prefabricate the races and on the also prefabricated Shrink on embossing rollers with a conical ring seat 110. Subsequently can the bearing seats of the embossing roller on the journal 12 and the Races 3 and the roll barrel 10 in a single setup be ground, whereby extremely high concentricity is achieved can be.

Depending on the type of embossing desired, it is possible to have only one embossing roller 1 form a surface profile and the second as a counter roll serving embossing roller 2, for example with a smooth roll bale to train. Of course it is also possible to use the second one To equip embossing roller 2 with a surface profile, only the areas marked with reference number 200 on which the Unroll race rings 3, they have to be smooth.

It is also possible to replace the one shown in the figures Embodiment in which only one embossing roller 1 with races 3 is formed, both embossing rollers 1, 2 with corresponding races 3 form, which roll on each other, being between the roll bales 10, 20 the embossing gap P for the passage of the material web to be embossed remains.

Also, instead of the adjustment shown on the races 3 adjacent pressure rings 6 relative to the ring receptacle 11 by means of securing and Adjusting screws 7 to the diameter of the races 3 change, an adjustment via hydraulic cylinders or similar drives be provided so that manual operations are eliminated.

Claims (9)

Device for embossing a material web, comprising two embossing rollers with roller balls, between which an embossing gap is formed for the passage of the material web, the embossing rollers being rotatably mounted on both sides in the apparatus by means of axial bearing journals and adjusting means being provided, by means of which the axial distance between the Embossing rollers can be changed so that the clearness of the embossing gap between the roller bales thereof can be adjusted and at least one of the embossing rollers on both sides of its roller bale is equipped with races as adjusting means which roll on the surface of the other embossing roller while leaving the embossing gap between the roller bales, thereby characterized in that the races (3) have a cylindrical outer surface (30) and a conical inner ring bore (31) and the embossing roller (1) receiving the races (3) on both sides between the roll barrel (10) and bearing journal (12) with corresponding n ring receptacles (11) with a conical ring seat (110) is formed, onto which the races (3) with their conical ring bore (31) can be pushed with radial expansion and the outer diameter (A) of the races (3) depending on the degree of Sliding on the ring seat (110) is changeable. Device according to claim 1, characterized in that the conical ring seats (110) of the ring receptacles (11) have an increasing diameter from their end facing the bearing journal (12) towards the roll barrel (10). Device according to one of claims 1 or 2, characterized in that pressure rings (6) are provided, by means of which the races (3) can be fixed in their position on the respective ring receptacle (11). Apparatus according to claim 3, characterized in that each pressure ring (6) can be placed laterally on a race (3) pushed onto a ring seat (11) and can be connected to it by means of securing and adjusting screws (7) which can be screwed into the ring seat (11) and in with respect to the ring holder (11) is displaceable. Device according to claim 3 or 4, characterized in that each pressure ring (6) can be supported resiliently with respect to the ring receptacle (11). Device according to claim 3, characterized in that each pressure ring (6) can be placed laterally on a race (3) pushed onto a ring seat (11) and hydraulic cylinders are provided, by means of which each pressure ring (6) can be displaced with respect to the ring seat (11) is. Device according to one of claims 1 to 6, characterized in that a circumferential annular groove (13) is provided in the region of each ring seat (110), which communicates with a channel (15) which is led axially out of the bearing journal (12) for the connection of a pressure source . Device according to one of claims 1 to 7, characterized in that the races (3) are made of hardened steel. Device according to one of claims 1 to 8, characterized in that both embossing rolls (1, 2) are formed on both sides of their respective roll bales (10, 20) with races (3) which roll against each other, whereby between the roll bales (10, 20) the embossing gap (P) remains.

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