DE19627677A1 - Winding device for webs of paper or the like and roller therefor - Google Patents

Abstract

Winding arrangement for a web (1) of paper or the like, for which at least one drum rests against a roll (2) to be wound as a carrier, backup or load drum (4, 5; 11) which comprises a portative drum body (24) having a cylindrical outer circumference (25), a radially deformable intermediate layer (26) of elastomeric material, attached to the outer circumference (25) of the drum body (24) and a cylindrical run casing (33) attached to the outer surface of the intermediate layer (26), concentric with the axis of the drum body (24), of a material several millimeters thick which can be elastically deformed under contact pressure, such that the run casing (33) cannot be, or can scarcely be deformed in an axial direction by the weight of the roll (2) to be wound with which it is in contact, such that the run casing is also indented in a radial direction lateral to the support region influencing the roll to be wound, manufacturing and adaption to particular needs becomes easier when the run casing (33) is composed of elastomeric material, which is radially elastically deformable, and its hardness is two to one-hundred times the hardness of the material of the radially deformable intermediate layer (26), the material of the intermediate layer (26) being in general incompressible and the intermediate layer (26) comprising cavities or void spaces being distributed over its circumference and making the intermediate layer, as a whole, compressible.

Description

The invention relates to a winding device for webs Paper or the like, in which mind on the wrap at least one roller as a supporting, supporting or loading roller abuts a load-bearing roller body with cylindri outer circumference, one on the outer circumference of the roller body Personally attached, radially resilient intermediate layer of elastomeric material and one on the outside beginning of the intermediate layer, cylindrical, for Axis of the roller body concentric barrel jacket from below the system pressure elastically deformable material of several Has millimeters thickness such that the barrel jacket through the load on the wrap in contact with it Axis direction is not or hardly deformable, so that the Barrel also on the side of the one influencing the winding Contact area is dented in the radial direction. The The invention further relates to a corresponding roller itself.  

Such a winding device and corresponding roller are known from DE-A1-40 35 054. This publication suggests a compact elastome for the intermediate layer res material with a hardness of 30 ° to 80 ° Shore A and for the Barrel jacket thin-walled spring steel with a radial thickness of Use 1 to 5 millimeters to reduce the number of wraps Hardness and without any significant impairment of the others To be able to produce winding quality. Such a roller enables due to the indentation ability of their barrel jacket the desired reduction in specific nip pressure relatively hard surface at the same time. The latter prevents that due to fluctuations in the thickness profile of the winding Paths of widely differing diameters in relatively narrow len zones of the roll to be wound over the roll width can train what would be the case with a soft surface. In the soft intermediate layer on its radial outer surface grooves made allow a certain compressibility the intermediate layer and prevent too strong Flexing of the roller covering and the resultant upper surface tensions of the roller covering in the nip and thereby induced tension changes in the web material. Without grooves would the roll surface in the nip the pressure in the circumferential direction dodge. The roller covering would be elastic Deformation drive, which is a significant change in web tension can cause. The ones used for the intermediate layer elastomeric materials such as rubber, polyorethane or the like Liche are without inclusions of compressible me serve, such as B. air, not compressible. Basically can but on the groove or other gas inclusions in the middle layer can be dispensed with, namely when the Er generating additional tension in the web material express is desired. In detail, the Content of the present application made disclosure of DE-A1-40 35 054 referenced.  

These known rollers and winding devices meet the Purpose of reducing the specific nip pressure at at the same time avoiding faults in the winding structure in the edge zones of the contact surface with the wrap in the ge wished way. However, the making of a sol Chen roller not unproblematic, since the manufacture of the Spring jacket made of spring steel and the assembly of rollers body, intermediate layer and barrel jacket are extraordinary are difficult. Another problem is the exact one Matching the mechanical properties of the intermediate layer and the barrel jacket to each other. E.g. can already smallest changes in the material thickness of the barrel jacket significantly affect mechanical properties. Au In addition, the alloy spectrum with reference to the ge desired mechanical properties relatively narrow. After all, such rollers are somewhat worn sensitive if the adhesion between the radially outer upper area of the intermediate layer and the radially inner surface of the Running jacket insufficiently or not sufficiently durable is dig.

Proceeding from this, the object of the invention is for the intermediate layer and the barrel jacket of a genus appropriate roller for a generic winding device Finding material pairing that is a comparatively simple Manufacture of the roll cover permitted and for the Use a simple tuning of the mechanical eigen allows the intermediate layer and the barrel jacket.

This task is carried out with regard to a generic wic kelvorrichtung and in terms of a generic Roll solved in that the barrel jacket from radially elas table resilient, elastomeric material and its Hardness two to one hundred times the hardness of radial resilient intermediate layer is.  

A winding device according to the invention and a roller here for have the advantage of easier manufacture in Compared to a barrel jacket made of metal, like the one from the DE-A1-40 35 054 is known. E.g. can the barrel jacket through Vulcanize with the intermediate layer be tied, the material of the barrel jacket being long Lich tape is made, one of which is the circumference of the jacket appropriate length is cut off. This creates at Form an all-round coat a seam that ih on the one hand by gluing, vulcanizing or the like can be concluded conclusively. Basically, too the production of a seamless barrel jacket and its ver bind with the intermediate layer possible.

A non-positive connection between the intermediate layer and the barrel jacket leads to favorable when operating the roller Properties because the material layers differ from intermediate layer and barrel jacket also due to the material pairing prolonged use and do not move towards each other or otherwise separate from each other.

The mechanical properties of the new material pairing can be varied within wide limits, e.g. B. by a create recesses in the surface, like a groove through gas inclusions, generally through a porous mate rialschicht or by varying the material hardness and / or Material thickness. In addition, the stretching and bending fit behavior of the intermediate layer on the barrel jacket comparative instruct easily.

Appropriate configurations of the subject matter of the invention in particular, open up the possibility of winding web-like material, especially paper, the wraps Further demands to improve the structure are in further claims contain.  

The aforementioned, as well as the claimed and in the off leadership example described to use according to the invention The components are subject to their size and shape design, choice of materials and technical conception kei NEN special exceptions, so that the respective current application area known selection criteria limited application.

Further details, features and advantages of the item the invention result from the following description Exercise of the associated drawing, in which - as an example - a preferred embodiment is shown. In the drawing demonstrate

Fig. 1 shows a schematically simplified winding device for winding rolls of bahnförmi gene good, in particular made of paper by means of two support rollers - in front view;

Fig. 2 shows an alternative embodiment of the Wickelvor direction according to Fig. 1;

Fig. 3 of the winding device according to Fig. 1 or 2, a support roller in axial section, in sections - section along the line III-III of FIG. 4 - and

Fig. 4 the same support roller as in Fig. 3 in section ent along the line IV-IV with an overlying Pa pierrolle.

In Fig. 1, a double support roller winding device 20 is shown, which is used to wind a paper web 1 into a roll 2 . The web 1 is brought under a certain longitudinal web tension. It wraps from below a driven, in the web running direction first support roller 4 with a horizontal axis, next to which a second support roller 5 in the same or, as shown in the exemplary embodiment and in so far preferred, at an unequal height with a allow the formation of a winding bed for the winding 2 Distance arranged. The winding 2 that forms is located at the points 6 and 7 (= A) with a nip pressure 8 on the supporting rollers 4 , 5 , which results from the weight of the winding 2 and the contact pressure 9 of a loading roller 11 , which is above the supporting rollers 4 , 5 is arranged symmetrically or asymmetrically to these and is under the force of at least one piston / cylinder unit 12 . The rollers 4 , 5 , 11 influence the winding hardness of the winding 2 by their surface behavior.

Referring to FIGS. 1 and 2 4, the first in the web running direction carrier roll on a radially resilient roll coating, whose transverse and longitudinal sections in connection with FIGS. 3 and 4 are explained in detail.

How 3 and 4 seen from the Fig., There is a roller 4 consisting essentially of a load-bearing roll body 24 made of steel or another highly rigid material, for example. B. fiber-reinforced plastic such as carbon fiber reinforced plastic with a bearing pin 23rd On the cylindrical outer periphery 25 of the roller body 24 , a radially elastic elastic intermediate layer 26 made of elastomeric material, optionally with the interposition of a binder layer 22, is attached. On the preferably cylindrical outer circumference of the intermediate layer 26 in turn, a further radially resilient layer of several millimeters thickness is attached from an elastomeric material. This layer forms the cylindrical barrel 33 on the outer circumference.

One of the main differences between the intermediate layer 26 and the running jacket 33 is the different hardness of the materials used, the hardness of the running jacket being two to one hundred times the hardness of the intermediate layer. The intermediate layer preferably has a PJ value of 80 to 110 (hardness measured value of the P&J plastometer) and the thickness of the intermediate layer is preferably between 10 and 20 millimeters. In contrast, the PJ value of the barrel jacket is preferably 5 to 15 and the thickness of the barrel jacket is preferably 5 to 15 millimeters. A total thickness of two radially elastically flexible layers made of elastomeric material of 20 to 30 millimeters, preferably about 25 millimeters, is particularly preferred.

The intermediate layer and the barrel jacket can be made of the same Basic material, but also from different basic materials exist, e.g. B. made of rubber, polyurethane or similar ela stomeric materials.

Since elastomeric materials are at least approximately incompressible in a non-foamed state, this property can lead to the fact that the radially resilient roller covering, in particular its radially inner, that is, the intermediate layer, under the influence of an adjacent roller, in particular the weight of a roll to be wound , builds up a mountain of material that leads the nipple because the material evades the nip pressure in the circumferential direction. As a result, the roller covering undergoes an elastic deformation which causes a considerable change in the tension of a material web which is wound onto a roll (roll 2 ) which is supported on the roller. If these web tension changes are undesirable - and this is the case in many cases - the intermediate layer is provided with cavities, so that the intermediate layer is thus compressible. The cavities can NEN in the form of coarser and / or finer pores evenly distributed in the middle, the z. B. contain air, reali based. But it is also possible to make recesses on the outer circumference of the intermediate layer, for. B. grooves, in particular spirally formed grooves, as they are known in principle from DE-A1-40 35 054. - In the embodiment of FIGS. 3 and 4 such Spiralnu th 27 with a width of about 1 millimeter and a depth of 3 millimeters are introduced into the outer peripheral surface of the intermediate layer 26 , while the radially inner regions of the intermediate layer 26 without voids, ie in are designed to be substantially compressible. The lateral spacing is preferably between 6 and 15 millimeters, but can also be as large as the groove depth, as in the exemplary embodiment. This division of the intermediate layer into a radially inner incompressible layer and a radially outer, provided with cavities and therefore compressible layer has proven to be particularly advantageous. In particular, one or more layers of foamed material can also be considered as the radially outer compressible layer, the pore size and / or distribution in the radial direction being able to form a gradient. It is particularly possible to produce such intermediate layers in one piece from the same material. Particularly easy to manufacture and as far as preferred is an intermediate layer, which is built up in multiple layers, the radially inner, essentially incompressible part can consist of one or more layers of an elastomeric material with the desired hardness, whereas the radially outer one , compressible area of the intermediate layer may initially be independent and may also consist of several layers, the layer material used and as such incompressible having the desired hardness per se, but this part of the intermediate layer as a whole, ie including its cavities has lower hardness.

A radially outer one with cavities is particularly preferred provided area of the intermediate layer initially on the ra dialen inner surface of the barrel jacket is provided and with  this together on the radially inner, none or less or smaller areas of the intermediate areas layer applied.

Both the possibly several sub-layers of the intermediate layer with each other as well as the intermediate layer and the Barrel jacket and optionally the intermediate layer and the Roller bodies can be used for mutual attachment Formation of the roller covering subsequently or simultaneously can be joined together by vulcanization. For this suitable adhesive layers can be applied to the late tere contact surfaces are applied. E.g. can the Connection of the layers to each other also through subsequent warming up. Likewise, elastomeric material as a foam between the incompressible layers of the Zwi layer and the barrel jacket to be introduced afterwards to harden.

It is indeed possible to make the barrel jacket as a whole compressible to a certain extent with comparable means as can be used for the intermediate layer. For this purpose, grooves 37 can also be provided in the barrel jacket 33 on its radia len outer surface, that is, the tread. As a rule, such an effect is undesirable in Laufman tel. Nevertheless, on its outer surface before seen grooves 37 primarily have a different function, namely to serve as air removal grooves, so that between a roll of material wrapping around the roll surface and the roll surface none can influence the friction behavior between the two mate rialien air cushion. Approximately, for example in the. 3 and 4 and to the extent shown in Fig exporting preferred width and depth of these grooves 37 as well as the groove spacing is provided slightly smaller than the grooves 27 of the intermediate layer.

In order to stretch the material web as much as possible when winding material webs, in particular paper, and to be able to wrap this stretch in the winding 2 , it has proven to be particularly advantageous to provide the running surface of the running jacket 33 with a low-friction layer 38 .

With a low coefficient of friction, the effective working distance for expansion can be increased. As shown by way of example in Fig. 1, the length of the action path would be, for example, as large as the length of the web between the nip A, between the winding 2 and the second support roller 5 and the point B drawn in a first support roller 4 Length z. B. be enlarged to the point B '. In the exemplary embodiment according to FIG. 2, this action distance would be even greater. The friction value µ may not be so small that in extreme cases the web slips over the first support roller 4 . Suitable for a low-friction layer is e.g. B. a Teflon coating, which can be applied by spraying the tread. Other low-friction materials can also be used. A typical thickness of a low-friction layer is between 0.05 and 2 millimeters, but it can also be less thick. Different roller coating materials can also be used for the winding of various web-shaped materials. Material webs made of paper, foils and the like can usually be wrapped with the same surface coating as made of Teflon.

The bending stiffness of the barrel jacket parallel to the rollers axis, i.e. in the transverse direction of the machine, can be passed through a fiber reinforcement, e.g. B. by approximately axially parallel worked to increase carbon fiber. To avoid desirable ter elongation of the barrel jacket in the circumferential direction are Ver Reinforcement elements, in particular fibers provided in are oriented essentially in the circumferential direction.  

As can be seen from FIG. 2, a squeeze roller 14 can be provided in such a way that the incoming web of material 1 is pressed against the support roller 4 encircling it. In this way, among other things, the action distance for the stretch that can be wrapped up can be increased. The squeeze roller 14 can also have a roller covering according to the invention.

Reference list

1 web of material
2 wraps
4 first carrier roller
5 second carrier roller
6 former nipples
7 second nip
8 nip pressure
9 contact pressure
10 roller covering
11 loading roller
12 piston / cylinder unit
14 nip roller
20 double carrier roller device
22 binder layer
23 journals
24 roller body
25 outer circumference
26 intermediate layer
27 spiral grooves
33 barrel jacket
37 grooves
38 layer

Claims (17)

1. winding device for webs ( 1 ) made of paper or the like, in which at least one roller as support, support or loading roller ( 4 , 5 ; 11 ), which has a load-bearing roller body ( 24 ), rests on the winding ( 2 ) cylindrical outer circumference ( 25 ), one on the outer circumference ( 25 ) of the roller body ( 24 ) attached, radially elastically flexible intermediate layer ( 26 ) made of elastomeric material and one on the outer circumference of the intermediate layer ( 26 ) attached, cylindrical, to the axis of Roller body ( 24 ) concentric barrel jacket ( 33 ) from under the contact pressure elastically deformable material of several millimeters thick in such a way that the barrel jacket ( 33 ) by the load on the coil ( 2 ) in contact with it in the axial direction or hardly deformable is, so that the barrel jacket is dented laterally of the bearing area influencing the winding in the radial direction, characterized in that the barrel jacket ( 33 ) consists of radially elastically flexible elastomeric material and its hardness is two to one hundred times the hardness of the radially elastic elastic intermediate layer ( 26 ). 2. Roller as a supporting, supporting or loading roller ( 4 , 5 ; 11 ) for a winding device for webs ( 1 ) made of paper or the like, which has a load-bearing roller body ( 24 ) with a cylindrical outer circumference ( 25 ), one on the outer circumference ( 25 ) of the roller body ( 24 ) attached, radially elastically flexible intermediate layer ( 26 ) made of elastomeric material and a cylindrical barrel jacket ( 33 ) of several millimeters thick attached to the outer circumference of the intermediate layer ( 26 ) and concentric with the axis of the roller body ( 24 ) has an elastically deformable material such that the Laufman tel ( 33 ) is not or hardly deformable in the axial direction by the load of the roller or roller in contact with it, so that the barrel jacket is also dented in the radial direction since the contact area, characterized in that the barrel jacket consists of radially elastically resilient elastomeric material and its hardness the two to egg is a hundred times the hardness of the radially elastically flexible intermediate layer ( 26 ). 3. winding device or roller according to claim 1 or 2, characterized in that the barrel jacket ( 33 ) by vulcanizing, gluing or the like with the inter mediate layer ( 26 ) is non-positively connected. 4. Winding device or roller according to one of claims 1 to 3, characterized in that the barrel jacket ( 33 ) consists of a length corresponding to the circumference of the jacket section of an elongated band. 5. winding device or roller according to one of claims 1 to 4, characterized by a binder layer ( 22 ) for non-positively connecting the intermediate layer with a roller body ( 24 ). 6. winding device or roller according to one of the claims 1 to 5, characterized in that the thickness of the Barrel jacket 2 to 20, preferably 5 to 15 millimeters is.   7. winding device or roller according to one of the claims 1 to 6, characterized in that the intermediate layer in a radially inner incompressible layer and a radially outer cavity and therefore compressible layer is divided. 8. winding device or roller according to one of the claims 1 to 7, characterized in that the intermediate layer of several layers of material or partial layer different properties. 9. winding device or roller according to one of the claims 1 to 8, characterized in that the intermediate layer, at least on part of its thickness, pores has, their size and / or distribution in radial Direction form a gradient which, preferably, a radially increasing compressibility for Consequence. 10. winding device or roller according to one of the claims 1 to 9, characterized in that the barrel jacket, at least before it is applied to the intermediate layer is a voided sublayer of the Interlayer wears. 11. Winding device or roller according to one of claims 1 to 10, characterized in that the running jacket ( 33 ) is provided on its radial outer surface with grooves ( 37 ). 12. Winding device or roller according to one of claims 1 to 11, characterized in that the running surface of the barrel jacket ( 33 ) is provided with a low-friction layer ( 38 ). 13. Winding device or roller according to one of claims 1 to 12, characterized by reinforcing elements incorporated into the running jacket ( 33 ). 14. The winding device or roller according to claim 13 is characterized by a parallel to the roller axis stretching fiber reinforcement of the barrel jacket. 15. winding device or roller according to claim 13 or 14, characterized in that the reinforcing elements ver approximately parallel to the circumferential direction of the barrel jacket to run. 16. A method for producing a roller for a winding device according to one of claims 1 to 15, characterized in that the layers of the roller covering ( 10 ) after joining together, for. B. by heating, non-positively connected. 17. A method of making a roll for a roll Device according to one of claims 1 to 15, esp special according to claim 16, characterized in that initially an incompressible or only slightly compressive ble sub-layer of the intermediate layer and the barrel jacket be formed into a cylindrical sleeve, the part layer of the intermediate layer and the barrel jacket or Concentrate at least a partial layer of the barrel jacket be put together and then one elastomeric material as a foam between the radial outer and the radially inner sleeve made of elastomer Material is introduced.