DE102008002398A1 - Manufacturing an endless belt for a machine for the production of web material such as paper/cardboard, comprises producing coil-like windings from winding structures, where intermediate space is formed between the coils of the structures - Google Patents

Abstract

The method comprises producing a coil-like first winding (18) from a first winding structure (A), where an intermediate space (22) is formed between the coils (20) of the first winding structure, so that the side edges of the first winding structure do not mutually contact, producing a coil-like second winding from a second winding structure (B), so that the intermediate space formed between the coils of the first winding structure is partially filled by the second winding structure, and producing a coil-like third winding from a third winding structure (C). The method comprises producing a coil-like first winding (18) from a first winding structure (A), where an intermediate space (22) is formed between the coils (20) of the first winding structure, so that the side edges of the first winding structure do not mutually contact, producing a coil-like second winding from a second winding structure (B), so that the intermediate space formed between the coils of the first winding structure is partially filled by the second winding structure, producing a coil-like third winding from a third winding structure (C), so that the third winding structure overlaps an adjacent region of the side edges of the first winding structure and sides edges of the second winding structure, and producing a coil-like fourth winding from a fourth winding structure (D), so that the intermediate space formed between the coils of the third winding structure is partially filled. The side edges of the first and second winding structures adjacently contact to each other, and overlap themselves. The intermediate space is formed between the coils of the third winding structure. The side edge of the second winding structure overlaps the side edge of the first winding structure and an intermediate space is formed between the other side edges of the second and first winding structures. One of the side edge of the third winding structure and the other side edge of the first winding structure overlap themselves, and the other side of the third winding structure and the other side edge of the second winding structure adjacently contact to each other or overlap themselves. The fourth winding structure overlaps an adjacent region of the side edges of the second winding structure and sides edges of the third winding structure. An intermediate space is formed between the coils of the fourth winding structure. The winding structures (A, B, C, D) are constructed with threads, wrap of yarns and/or ribbon-like material, which comprises non-woven, felt, fabric and net-like material, and with a powdered- or resin-impregnated material, laminated material, cabled material, fiber-reinforced flexible plastic material or multi-component material. The side edges of the winding structures are connected with one another. The layers of the winding structures are bonded with one another and lie on each other, where the bonding takes place by needling, adhering or fusing. The fibrous material, granular material, powdered material, thread material and/or web-like material made of thermoplastic material are provided between the layers of the winding structures and/or on one of the winding structures uncovered by a further layer. An independent claim is included for an endless belt for a machine for the production of web material such as paper or cardboard.

Description

The The present invention relates to a process for producing a Endlosbandes, as for example as so-called press felt in a press section of a machine for producing web material, especially paper or cardboard, can be used.

At one of the EP 1 356 157 B1 known method for producing such a tape, the tape is produced by the helical winding of a strip whose width is smaller than that of the tape to be produced. In this case, the strip is wound so that its side edges in successive turns touch each other and are joined together in these so adjoining edge regions.

From the EP 0 464 258 B1 For example, there is known a method for producing such a tape in which a web strip whose width is smaller than that of the tape to be produced is wound helically. The winding takes place such that the side edges of such a web strip overlap each other.

It The object of the present invention is a process for the preparation an endless belt for a machine for the production of Railway material, in particular paper or cardboard to provide, with which a reliable in operation and the loads in the tape longitudinal direction and strip transverse direction receiving band can be produced.

• a) Herstellen einer wendelartigen ersten Wicklung aus einer ersten Wicklungsstruktur, wobei zwischen den Windungen der ersten Wicklungsstruktur ein Zwischenraum gebildet wird, so dass Seitenränder der ersten Wicklungsstruktur sich nicht gegenseitig berühren,
• b) Herstellen einer wendelartigen zweiten Wicklung aus einer zweiten Wicklungsstruktur, derart, dass der zwischen den Windungen der ersten Wicklungsstruktur gebildete Zwischenraum wenigstens teilweise durch die zweite Wicklungsstruktur gefüllt wird.

According to the invention, this object is achieved by an endless belt for a machine for producing web material, in particular paper or board, comprising the measures:

• a) producing a helical first winding from a first winding structure, wherein a gap is formed between the turns of the first winding structure, so that side edges of the first winding structure do not touch each other,
• b) producing a helical second winding from a second winding structure, such that the gap formed between the turns of the first winding structure is at least partially filled by the second winding structure.

at the tape of the invention is in contrast to the method known from the prior art, a winding so wound with helical structure that the resulting turns neither overlap nor touch each other. Rather, a gap is formed between the turns, with the result that the side edges of the winding structure used for winding do not touch each other. So it turns out one Configuration similar to that of an exploded coil spring is.

Of the In this first winding generated gap between the individual turns is then at least partially by a second helical winding or used for the second Winding structure filled. It can thus be a very uniform, level structure of an endless belt are obtained, in which moreover the possibility exists, by selecting different winding structures a substantial influence on the characteristics of the band to take on.

Around connect between the two winding structures To be able to, for example, be provided that at least a side edge of the first winding structure and at least one side edge the second winding structure abutting each other touch. Furthermore, it can be provided that at least a side edge of the first winding structure and at least one side edge of the second winding structure overlap. The connection adjoining margins can, for example, by a Adhesive fleece layer or an extruded grid covering the side edges, respectively.

Around a particularly stable connection between two with their turns can obtain interlocking positioned winding structures in the method according to the invention also a Measure c) be provided for producing a helical third winding of a third winding structure such that the third winding structure the abutment area of a side edge the first winding structure and a side edge of the second Winding structure overlaps. Again this may be the principle be provided in the present invention, that between the Windings of the third winding structure formed a gap so that a measure d) can continue to be provided can for producing a helical fourth winding of a fourth winding structure such that between the turns The gap formed by the third winding structure at least partially filled. This is how you become multilayer structure of the endless belt obtained, of course not only comprise two layers each with two winding structures can, but also multiple layers of superimposed Winding structures comprising each of these layers, for example two or more winding structures.

In an alternative procedure it can be provided that a side edge of the second winding structure has a side edge of the first wick overlap structure and between the other side edge of the second winding structure and the other side edge of the first winding structure, a gap is formed.

Around also in this approach, a continuous composite in one Location of winding structures can also be a measure e) be provided for producing a helical third winding from a third winding structure such that a side edge the third winding structure and the other side edge of the first Winding structure overlap.

there may preferably be provided that the other side edge the third winding structure and the other side edge of the second winding structure Touch each other or overlap.

One very stable bond between the second and the third winding or winding structure can be achieved by a measure f) for producing a helical fourth winding of a fourth winding structure such that the fourth winding structure the abutment area of the other side edge of the second winding structure and the other side edge of the third winding structure overlaps.

Also In this case, between the turns of the fourth winding a gap be formed, which then possibly with another, ie a fifth winding or winding structure can be filled.

• – einem oder mehreren Fäden oder/und
• – einer Fadenschar oder/und
• – bandartigem Material.

At least one of the winding structures can be constructed with

• - one or more threads or / and
• - a group of threads and / or
• - band-like material.

Especially when using band-like material, this can be the band-like Material include fabric, nonwoven, felt, knit or reticulated material.

The Winding structures can be constructed with impregnated, preferably powder or resin impregnated material, laminated Material, plied material, composite material, preferably fiber-reinforced elastic plastic material, or multi-component material. It is of course that different winding structures with mutually different construction materials or in principle different type, ie fabric, non-woven or the like realized could be.

The abutting or overlapping one another Winding structures can preferably be connected to one another are, as well as superimposed layers of winding structures at multilayer construction. This bonding may preferably be done by needling, Gluing or melting done.

Further can help increase structural stability be provided that between superimposed layers of winding structures and / or on a winding structure not covered by another layer Fiber material, granular material, powder material, thread material or / and web-shaped material, preferably of thermoplastic Material is provided.

According to one In another aspect, the present invention relates to an endless belt for a machine for producing web material, in particular Paper or cardboard comprising at least one helical winding from a winding structure with approximately in one Band longitudinal direction extending winding sections, wherein between the turns of at least one winding structure a gap is formed so that side edges adjacent Windings of this winding structure do not touch.

The The present invention will be described below with reference to the accompanying drawings Figures detailed. It shows:

1 a first production phase for producing an endless belt;

2 a top view of the in 1 item shown;

3 one of the 1 corresponding representation of a second production phase in the production of an endless belt;

4 a plan view of the subject of 3 ;

5 in principle sectional view of the adjacent and alternating turns of two intermeshing windings;

6 one of the 5 corresponding view with spaced turns;

7 another one 5 corresponding view with other winding structures;

8th one of the 5 corresponding view with two superimposed layers of winding structures;

9 in the 8th shown variant with their winding structures;

10 one on the variant of 5 constructive embodiment with two layers of winding structures;

11 one of the 5 corresponding representation of an alternative Ausgestaltungsart.

The 1 to 4 show two stages of production in a process for producing an endless belt, for example, as a press felt or the like in a machine for producing web material, such. As paper, can be used. In this manufacturing method, several winding structures explained below are applied to two winding bars 10 . 12 helical, so wound up in the manner of an exploded coil spring.

In the in the 1 and 2 production phase shown is a ribbon-like winding structure A, so for example, a fabric tape, a felt or a nonwoven tape so on the two bars 10 . 12 wrapped that on the one hand the between the two bars 10 . 12 lying sections 16 the first winding thus produced 18 from a first winding structure A approximately in a tape longitudinal direction MD, which simultaneously also corresponds to a machine direction in a paper machine or the like extend. In a strip transverse direction CMD, which corresponds to the cross-machine direction, have the successive turns in this winding direction 20 the first winding 18 a distance from each other. It is thus between these individual windings 20 a gap 22 formed, the a defined distance between the individual turns 20 equivalent. The consequence of this is that the margins 24 . 26 the neighboring turns 20 Do not touch or overlap each other.

After this first winding 18 from the first winding structure A over the two beams 10 . 12 or during this process is in a further phase of the manufacturing process in the 3 and 4 recognizable with darker color second winding 28 over the bars 10 . 12 wound. The direction in which it is wound may be opposite to that of the preceding phase. This second winding 28 is constructed with a second winding structure B, which may for example correspond to the first winding structure A or may also be constructed of other material. Also in the second winding structure B of the second winding 28 essentially result in sections extending in a band longitudinal direction 32 between the bars 10 . 12 , In particular, it can be seen that the second winding structure B the space 22 between the turns 20 the first winding 18 fills. It is also the second winding 28 so wrapped that between their turns 34 a mutual distance 36 is substantially equal to the width of the first winding structure A, with which the first winding 18 is constructed. The margins 38 . 40 Thus, the second winding structure B also have a mutual distance so that they do not touch each other.

In the manner described above, two winding structures A, B or two nested windings can therefore be used 18 . 28 a substantially flat, closed structure are produced for an endless belt. For the relative position of the individual windings 18 . 28 with respect to each other will be described below with reference to the 5 to 11 explains, different ways. In these figures, the capital letters A, B, C, D respectively indicate the winding structures of the individual windings which are in these 5 to 11 in section, that is, a section in the band transverse direction CMD, are shown.

One recognizes in 5 a configuration in which the individual turns of the winding structure A and the winding structure B are such that a side edge 26 the winding structure A is a side edge 38 the winding structure B is opposite. Equally, lies the margin 40 the winding structure B of the side edge 24 the winding structure A opposite. At the in 5 the variant shown, the individual winding structures in the region of their side edges touch 24 . 26 . 38 . 40 each other.

In 6 a variant is shown in which the pitch of the individual windings of the winding structures A and B is greater than the width of the respective other winding structure. As a result, between the opposite side edges 26 and 38 on the one hand, and 24 and 40 on the other hand, a gap remains.

The 7 shows a variant in which the winding structures A and B are not constructed of band-like material, as in 5 and 6 is recognizable, but each of a plurality of mutually parallel threads or yarn sheets. The filaments of the winding structure A and the filaments of the winding structure B alternate according to the respective turns from each other.

The 8th shows a variant in which two layers of nested windings A and B on the one hand and C and D on the other hand are provided. Here is the relative positioning of the two layers 42 . 44 such that the winding structure C of the second layer, the adjoining region of the two winding structures A, B of the ers th situation 42 in the area of the margins 26 . 38 covered while the winding structure D of the second layer 44 the opposite edge areas 24 . 40 the winding structures A, B covered. In this respect, cover the two winding structures A, B of the first layer 42 then also the respective abutment areas of the winding structures C and D. It should be noted here that, of course, such a structure can be realized with more than two layers, which of course depends on the respectively selected winding structures or their material strength or the thickness of the produced endless belt.

The 9 shows a variant which essentially the in 8th shown variant, ie with two layers 42 . 44 is constructed of winding structures. The 9 illustrates that, of course, differently constructed, in particular differently shaped cross-section materials, in this case thread-like materials, can be used for the individual winding structures.

The in the 10 illustrated embodiment provides a connection between the in 5 shown embodiment and in 8th or 9 shown embodiment variant. The 10 So shows a structure with two layers 42 . 44 of winding structures, wherein the individual winding structures A, B, C and D are again constructed here with band-like material and are arranged so that they cover each other's existing adjoining areas.

In the 11 a variant embodiment is shown, in which in the first manufacturing process, the winding structure A 'is wound, so that the individual turns of the same in 11 have recognizable mutual distance. In the second manufacturing process, a second winding structure B 'is wound to obtain a second winding, the second winding structure B' having its edge region 38 the edge area 26 the first winding structure A 'overlaps. Subsequent to or simultaneously with the second winding structure B, a third winding structure C 'is wound, in such a way that it has an edge region 46 the edge area 40 the second winding structure B 'is directly adjacent to and abuts, for example, while the other edge region 48 the third winding structure C 'the edge region 24 the first winding structure A 'overlaps. In the adjoining area of the two winding structures B 'and C', ie where the two side edges 40 . 46 adjacent to each other, then a fourth winding structure D 'is wound, which with respect to the first winding structure A' is positioned so that they lie alternately with their turns. Here, finally, a multi-layer structure is achieved, wherein the first winding structure A 'and the fourth winding structure D' in two different layers 42 respectively. 44 while the second winding structure B 'and the third winding structure C' extend from one layer to the other.

Previously, with reference to the 5 to 11 various variants are shown, as in the production of an endless belt to be constructed according to the invention, the individual windings or the winding structures constituting these can be laid relative to each other. In order to generate a solid bond between the windings or winding structures, they can be connected to one another where they overlap or adjoin one another, for example by needling, fusing or gluing. Also, a pulp can be applied to a respective layer of winding structures and connected to these, for example, a material fit, so that in particular when the individual winding structures are composed of individual threads or groups of threads, these are combined into a solid composite. Also, for example, profiled threads can be used, the structure of which can produce a mutual form-fitting composite.

at the multi-layer structure, it is advantageous between them individual layers, but basically also on the surface individual layers, thermoplastic material, such. B. fiber material, Granules, powders, filaments or filament bundles or in band-shaped Structure or in combination to the structural Composite, for example, by melting this thermoplastic Further solidify material. Next can be between the individual layers or on the surface of a respective Layer of short fibers, preferably of preimpregnated fiber materials, applied, be sprayed, for example.

When Building materials for the individual winding structures have been particularly impregnated, such as resin impregnated or powder-impregnated materials, laminated materials, Material combinations or composite materials, such. B. fiber reinforced elastic plastic, proved to be particularly advantageous. Also multi-component materials, especially two-component materials, can be used reach. Especially if the individual winding structures from band-like material, so for example felt or nonwoven material are constructed, the composite can also by mutual needling What is advantageous is the different winding structures so that they at least partially overlap.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1356157 B1 [0002]
• - EP 0464258 B1 [0003]

Claims (19)

Method for producing an endless belt for a machine for producing web material, in particular paper or board, comprising the measures: a) producing a helical first winding ( 18 ) of a first winding structure (A), wherein between the turns ( 20 ) of the first winding structure (A) a gap ( 22 ) is formed so that side margins ( 24 . 26 ) of the first winding structure (A) do not touch each other, b) producing a helical second winding ( 28 ) of a second winding structure (B) such that the between the turns ( 28 ) the first winding structure (A) formed gap ( 22 ) is at least partially filled by the second winding structure (B). Method according to claim 1, characterized in that at least one side edge ( 24 . 26 ) of the first winding structure (A) and at least one side edge ( 38 . 40 ) of the second winding structure (B) abut each other. Method according to claim 1 or 2, characterized in that at least one side edge ( 24 . 26 ) of the first winding structure (A) and at least one side edge ( 38 . 40 ) of the second winding structure (B) overlap. A method according to claim 2 or 3, further characterized by a measure c) for producing a helical third winding of a third winding structure (C) such that the third winding structure (C) the abutment region of a side edge ( 26 ) of the first winding structure (A) and a side edge ( 38 ) of the second winding structure (B) overlaps. Method according to claim 4, characterized in that that between the turns of the third winding structure (C) a Interspace is formed. The method of claim 5, further characterized by a measure d) for making a helical fourth winding of a fourth winding structure (D) such that the one formed between the turns of the third winding structure (C) Interspace is at least partially filled. Method according to claim 1, characterized in that a side edge ( 38 ) of the second winding structure (B ') has a side edge ( 26 ) of the first winding structure (A ') overlaps and between the other side edge (A) 40 ) of the second winding structure (B ') and the other side edge ( 24 ) of the first winding structure (A), a gap is formed. A method according to claim 7, further characterized by a measure e) for producing a helical third winding from a third winding structure (C ') such that a side edge ( 48 ) of the third winding structure (C ') and the other side edge ( 24 ) of the first winding structure (A ') overlap. Method according to claim 8, characterized in that the other side edge ( 46 ) of the third winding structure (C ') and the other side edge ( 40 ) of the second winding structure (B ') abut each other or overlap. Method according to claim 8 or 9, further characterized by a measure f) for producing a helical fourth winding from a fourth winding structure (D ') such that the fourth winding structure (D') covers the abutment region of the other side edge (D '). 40 ) of the second winding structure (B ') and the other side edge ( 46 ) of the third winding structure (C ') overlaps. Method according to claim 10, characterized in that that between the turns of the fourth winding (D ') a gap is formed. Method according to one of claims 1 to 11, thereby characterized in that at least one winding structure (A, B, C, D) is constructed with: - one or more threads or and - a group of threads and / or - band-like Material. Method according to claim 12, characterized in that that the ribbon-like material is woven, non-woven, felt, knitted or net-like Material includes. Method according to one of claims 1 to 13, characterized in that at least one winding structure (A, B, C, D) is constructed with impregnated, preferably powder or resin impregnated material, laminated material, plied material, composite material, preferably fiber-reinforced elastic plastic material, or multi-component material. Method according to one of claims 1 to 14, characterized in that adjoining or overlapping side edges ( 24 . 26 . 38 . 40 . 46 . 48 ) of winding structures (A, B, C, D) are interconnected. Method according to one of claims 1 to 15, characterized in that superimposed layers ( 40 . 42 ) of winding structures (A, B, C, D) are interconnected. Method according to claim 15 or 16, characterized that the connection by needling, gluing or fusing he follows. Method according to one of claims 1 to 17, characterized in that between superimposed layers ( 40 . 42 ) of winding structures (A, B, C, D) and / or on a not covered by another layer winding structure (A, B, C, D) fiber material, granular material, powder material, thread material and / or sheet material, preferably of thermoplastic material , is provided. Endless belt for a machine for producing web material, in particular paper or cardboard, comprising at least one helical winding ( 18 ) of a winding structure (A) with approximately in a band longitudinal direction (MD) extending winding sections ( 16 ), whereby between turns ( 20 ) at least one winding structure (A) a gap ( 22 ) is formed, so that margins ( 24 . 26 ) of adjacent turns ( 20 ) of this winding structure (A) do not touch.