DE8233001U1 - AREA AREAS, PREFERABLY SCREENING BAND OR LINKED BAND FOR PAPER MACHINES OR THE LIKE - Google Patents

Description

Flat structure, preferably a sieve belt or link belt for Paper machines or the like.

The innovation relates to a flat structure, preferably on a Si @ bband or link belt for paper machines ο «.dgl. alt a multitude of coils made of elastic plastic or metal twisted, which consist of opposing winding legs and head arches that connect them to one another their interstices each have a head arch of the adjacent helix is inserted so far that between the two coils there is an over- ■ lap area is created in which a pintle made of plastic or metal is arranged,

Such Fläshengebilde are described for example in the DB-PS _: £ k A9 751 and in DE-OS 29 38 221. _κ \

In the patent mentioned first, the wire coils are pretensioned in the manner of tension springs in such a way that the respectively adjacent wire coils rest against one another in a contracting manner.

Such a wire link belt should have its dimensions in operation Maintained elastic in particular in the transverse direction. Farther . the technical progress of such a wire link belt is seen in the fact that its production is thereby simplified, that when joining the coils inevitably their place

fi & den and clamp each other, so that elaborate devices can be avoided and that the connection old no longer have to be stiff and heavy.

ι. ι

Ie case of the above-mentioned Offenlegungsschrift is provided » that the Wpn & eln have no tension spring tension, .and that the wire of the coils is torsion-free *. As a result, solj. .the Lifetime of the fabric can be increased and the Markle guaranteed be.

These different, practically contradicting statements lead to flat structures that can be used in a variety of ways. ^

In the course of time, however, it has been found that these fabrics have peculiarities for which oils ' improvements have been sought'.

As a result of the mostly round or slightly oval cross-sections of the wires that make up the coils, which are always the same, this shows

Flat structures have an extremely high level of air permeability ,on. This is sometimes desirable, but during manufacture from paper it often causes the paper to flutter.

One helps oneself with the fact that 'in the coils made of elastic synthetic

Fabric or metal wire - apart from the connecting means wires) - additional filling elements can also be introduced. ._ This allows the air permeability to be influenced, but a considerable amount of work has to be accepted in order to insert the parts, which are designed as pintle wires or as cotton-plastic fillers, into the coils. In addition, material consumption and purchase price increase.

Another peculiarity of previous flat structures is the so-called Point contact between the load-bearing winding legs

and for example the paper. Depending on the weight and quality of the paper and the contact pressure during production, it leads to print the winding legs on the finished paper. ' It is true that these impressions are desirable for the production of samples, for example, in the production of highly qualified ones On the other hand, on smooth papers, these marks must be avoided at all costs will.

The cur punctiform or box-shaped 'contact between the supporting winding legs of the coils and the paper leads to a different peculiarity of the known flat structures, namely that the heat flow between the calender roll and the '< Paper is weak because of the limited number of copies and the resulting small contact areas. this leads to the use of coils made of flat wires. These cause the load-bearing winding legs to have larger contact surfaces with the paper, which reduces the risk of marking at the support points and support edges and the heat flow can be improved, but an even higher air permeability of the fabric has to be accepted as the distance between the individual turns of the helix increases

in order to reduce this air permeability, the ^. last-described flat structures or sealing strips Sheet metal inserts are used, which are inserted in the longitudinal direction in the coils or in the spaces between adjacent winding legs.

In contrast, the present innovation is based on the task to create a flat structure of the type described above, which has the advantages of being easier to manufacture Fret wire coils with the advantages of large contact surfaces and good heat transfer and a finite air permeability connects.

It has been found that this problem can be achieved in a simple manner in that the load-bearing winding legs of the coils have flat bearing surfaces, "the width of which is greater than the wire diameter or the wire width of the top arches. * ■ '* ■

As a result, the coils can be joined together to form flat structures just as easily - often even more easily - as coils made from round wire. For the automatic production of sheet-like structure "on Fertigungs-- (joining) machines only a spiral size need be provided in other words. Virtually all automated manufacturing (add-r) machines can not process '' ■ problems fabrics with just manufacture your own helix size.

In addition, the manual production is simpler and easier, since the coils used are more precise and smoother than previously used Coils are.

The spaces between the individual winding legs can be made larger or smaller as required. Man receives not only advantageous large flat receiving surfaces of the load-bearing winding legs, but also a desired air flow Starch, without the disadvantageous use of fillers between the winding legs or within the coils.

The heat transfer, for example from calender rolls through the sheet toild to the paper, is also improved;

There are also comparable advantages: with regard to numerous other possible uses of the flat structure according to the invention, for example as a sieve belt.

You have it through the width of the winding legs and the size of the interstices in the entire flat structure, which is dependent on it

• · I I I I

α

in hand, the air permeability between those »one almost closed total contact area and that too vary, which is formed from load-bearing winding legs, ■ 'whose width is only slightly greater than the diameter . 'or the width of the head arches.

..- < ^: In one embodiment of the innovation, the new surface-Vif.V structure is designed so that the winding legs of the coils opposite the flat contact surfaces pointing to the load-bearing winding legs have a round, oval or triangular cross-section exhibit. The air permeability is. . 'influenced me by the load-bearing winding legs. . . *

A further possibility of varying the air permeability with a large support for the paper results from the fact that both of the winding legs of the coils, which are each connected to a head arch, have flat support surfaces. This becomes the. Air flow has a greater resistance to the opposite than in the first exemplary embodiment.

According to the innovation has it in hand, that the wires of the coils of the Kopfbögen- a substantially round, oval, triangle-like or rectangle-like, from its original shape at most squashed cross section and ^the: plain. Winding legs having contact surfaces have a nearly rectangular cross-section. It is thereby providing able _s fabrics available, all with respect, their agility, their air jet> irchlässigkeit their assembly at ei "requirements, namely their support surfaces scale in terms of their heat transfer from calender rolls to © paper meet.

The planar structures according to the innovation in 'an embodiment characterized in that the

Width of the plane. Winding legs having contact surfaces is up to twice as large as the wire diameter or the Wire width of the head arch »

In another exemplary embodiment, the width is the plane Winding legs having contact surfaces twice as large as or larger than the wire diameter or the wire width. the "head bow".

The coils of the new fabric are wound on a pitch, in such a way that the coils have a tension spring-like pretension, the fixed space between their head arches but is larger than their wire diameter or their wire width. As a result, the head arches of adjacent spirals do not lie, to each other, although the coils as such are like tension springs Have bias. -

Further advantages and possible variations can be achieved in that the coils are alternately right or left ' common spirals are »

Without changing anything at the core of the innovation, all spirals can the planar structures also have right-handed or left-handed spirals be.

Although the distance between the head arches of the coils is greater than the width or diameter of the head archwires, the converts can still be placed in collection containers prior to manufacture keep »without them getting caught in one another.

In a further embodiment of the innovation, the Winding legs with 'the pintle wires one of 90 ° different Angle where, on the other hand, the head arches of the coils make an angle of about 90 ° with the pintle wires.

I »

ι ι

- «11 ™> ι" · *

Further different embodiments of the sheet according to the present innovation can be in any of claims _t i3 and remove 15th

Voö. Flat structures that are after the innovation are also an advantage eyelets in their edge fastenings or lugs for inserting Have thorns. Preferably in such flat structures the pintle wires made of steel wire, so that the flat structures pull apart more or less far over the thorns allow, for example, to vary the air passage. Without changing anything at the core of the innovation, this “ Leading example the pintle wires are also made of plastic, As a result of the elasticity of the individual coils, the flat structures can be reduced back to their original length as required will.

Uo to achieve the same effect, have the _{fiandbefesti-)} conditions of some fabrics after .Neuerung aucii reinforcements for the attack of Zugklauen on,

Embodiments of the innovation are based on the following the drawing explained.

It shows;

Figure .1 is a plan view in a schematic representation an embodiment of the innovation,

Fugir 2 shows a plan view of further exemplary embodiments the innovation,

Figure 3 is a plan view of another embodiment the innovation,

, Figure 4 is a plan view of a further example of the

■ innovation,

Figure 5 is a plan view of an embodiment of the. Innovation in which the winding legs and head bends i ■ the coils have different orientations in relation to the pintle wire exhibit,

Figure 6, a cross section along the line VI ». VI in Figure 2,

Figure 7 shows a 'cross section along the line VII, VII in Figure?,' ■

F'i & ur 6 a tail section through a flat structure, '

FIG. 9 shows a partial section through a flat structure along the line 23C ₁ IX in FIG. 10 and

FIG. 10 shows a construction detail

Figure 1 shows a schematic overview drawing in which a Partial section from a generally designated 1 sheet is shown. The flat structure shown only in the section itself can be any length and also any pulp, 'te exhibit. The two vertical lines in the middle of the illustration are intended to indicate this schematically.

The flat structure consists of individual coils 2, the example | how the helix 3 can be right-handed or how the helix 4 can be left-handed. Adjacent coils are made by means of pintle wires 25 articulated together. The coils themselves are not of interest in connection with the present innovation Made from elastic plastic or metal wire. As shown in FIG. 10, they consist of tra- | lowing winding legs 7 and these opposite winches | extension legs 8. The winding legs are by means of head arches 17 connected to each other.

FIG. 1 shows that between the individual head arches 17 'there are spaces 18, each of which has a head arch of the adjacent helix inserted. This creates between two adjacent coils, as can be seen in FIG. an overlap area 24 in which the pintle wire 25 is inserted. The head bends 17 of adjacent coils together form hit the pintle wire 25 is an articulated hinge-like connection.

The pintle wire 25, like the material of the coils, can be made of plastic or metal.

* 13 ^million

I 4 * 6 MIM (I

Bid la, the top view of Figure 1 overhead load-bearing winding leg? have flat contact surfaces 12, the width 15 of which is greater than the wire diameter 23 or the wire *,

• wide 3 "of the head arches 17. _ä ,

The gap 18 between adjacent head arches 17 is larger than the wire diameter 23 or the * wire width 23a the head arches.

Figure 2 shows that below the load-bearing winding

Legs 7 run opposite winding legs 8 which, in contrast to the bearing surfaces 12, have a round cross-section 9 and, as FIG. 9 shows, can also have an oval cross-section 9a or a triangular cross-section, 9b. ' _t ' · "j

In a further Ausführungsbeispiej. can be opposite the winding legs 10 also have rectangular cross-sections 11. .

FIG. 2 shows that the opposite winding legs 10

can also have a rectangular cross section 11. f ■

In figure 2 is further indicated that the wire made of the coils 3 and 4 respectively, an elastic plastic \ |? O · metal wire 5, whose diameter is 6 in some embodiments of the innovation is approximately equal to the diameter> of the head arches 17 "

In special exemplary embodiments of the innovation, the opposite winding legs 10 can also have flat bearing surfaces 12 have.

The flat bearing surfaces 12 have a width 13 and edges 14, between which spaces 16 are arranged.

According to FIG. 2, the flat structure consists of left-handed and . right-handed coils 4 or 3 It can be seen • that the head arches of adjacent spirals are basically not in , '· ,! The result of a tension similar to a spiral spring lying against one another. This is due to the fact that the coils 2, 3r4 are wound on a pitch are and that they have a tension spring-like preload such that the fixed gap 18 between their head ' bögea 17 is larger than your wire diameter 23 or your wire " wide 23a. The wires 22 of the head arches 17 (Figure 8) of the coils 2, 3j 4 have an essentially round cross-section 20, a oval cross-section 20a, a triangular cross-section 20b or a right-hand cartilaginous cross-section 20c, which may be squeezed compared to its original shape is, as this is indicated by the position 21 in FIG. Regardless of the shape of the wires of the head arches, the flat bearing surfaces 12 have winding legs 7 and an almost rectangular cross-section 11.

Among other things, the planar structures according to the innovation with regard to the supporting surface, Air passage and heat transfer as well as a large one with regard to their mechanical or manual production To give a range of variation, the width 13 of the flat support surfaces up to twice as large as the wire diameter 23 or the wire width 23a of the head arches. 17. In another Embodiment is the width 13 of the flat bearing surfaces

, 12 and the winding legs 7, 10 having these are twice as large as or larger than the wire diameter '23 or the wire

"; width 23a of the head arches 17. Which width ratio in detail is chosen depends on the intended use of the fabric.

FIG. 3 shows an exemplary embodiment in which the coils 2 are all left-hand coils 4. ,

Figure 4, however, shows an exemplary embodiment in which all spirals 2 are right-handed spirals 3. The execution

- 15 -

example according to Figure 4 shows that the edges 14 of adjacent flat bearing surfaces 12 lie tightly against one another. According to the exemplary embodiment according to FIG. 3, between the edges 14 is in each case a distance 16 is provided. Through the design of the width 13 of the flat bearing surfaces 12 and through the resulting Distances 16 between the flat bearing surfaces 12 can be, for example, in the papermaking of the by Air flow passing through flat structures vary.

.Figur 5 shows an embodiment in which the 'winding legs 7 or the opposite winding legs 8 and 10, not shown, with the pintle wires 25 one yon 90 ° different angles ** form the head arches 17 of the Coils 2, 3, 4, however, assume an angle ^ of about 90 °. This formation of the flat structure allows the passage area for the air with an even smaller cross-section than in the other exemplary embodiments.

Figures 6 and 7 leave in detail dimensions of the individual Recognize coils. Figure 6 shows that the load-bearing winding legs 7 have an almost rectangular transverse * Have section 11, whereby flat bearing surfaces 12 are created. The width 13 of these load-bearing winding legs 7 is dimensioned according to FIG. 6 so that there is a distance between the edges 14 is adhered to. This distance is fixed.

The opposite winding legs 3 have according to Figure 6 -, a round cross-section 20 on *.

In the exemplary embodiment according to FIG. 7, the supporting winch legs have 7 and the opposite winding legs 10 both have rectangular cross-sections 11. The head arches 17, however have a squeezed cross-section 21, which is also made of iron

It J 1 I t IIII Il

at···

- 16 - '

oval, triangular or rectangular basic cross-section 20a, , 2Oc may have emerged.

The schematic representation according to FIG. 8 can be repeated Recognize the details of the dimensions. The head arches 17 have outer edges 19 on. The total distance between these outer edges 19 is denoted by 32. It is given by twice the wire diameter 23 or twice the wire width 23a of the head bow Ί7, the diameter 26 of the pintle wire 25 and through the game 27 between the head arches 17 and the pintle wire 25. As a result of this With play, the hinge effect between adjacent spirals is possible.

Hit 24 in Figure 8 denotes the so-called overlap area, which is given by the diameter 26 of the pintle wire 25 and the clearance 27 between the pintle wire 25 and the head arches 17. 33 is the distance from the inner edge of a head arch to the outer edge 19 of the opposite head arch denotes; ¹

Figures 9 and 10 show further details of the sheet with cross-sections 11 of the head curves 17 'which are rectangular-like and cross-sections 9a and 9b, which are oval or triangular, which wire HZW, head arc cross-section is used in the individual, is located on the desired mode of use of the sheet.

According to FIG. 10, the head arches 17 are during manufacture the coils a bit squeezed. By subsequently fixing the coils, in most of the exemplary embodiments they have the oval shape according to Figure 10.

FIG. 1 shows particularities of an exemplary embodiment. The edge fastenings 28 are necessary to the width of the surface

to fix structures in the long term. On the right-hand side of FIG. 1, eyelets 29 for mandrels 30 are indicated, whereas reinforcements 31 can be arranged in the edge fastenings 28 on the left-hand side © of FIG. With the help of the mandrels 3Q, the flat structures can be pulled apart as required, especially when the pintle wires 25 are made of metal, whereby the air passage through the flat structure can be varied as desired. To ensure a secure hold of the eyelets 29 in the edge fastenings, barbs 34 are provided. The _{tabs 35t in the mandrels also can be inserted for pulling the fabric during operation, have securing holes 36 which ensure its secure fit within the tape fasteners 28 made of plastic.

* iM *

f (I Il

it I (

Claims (1)

1. Flat structure, preferably sieve belt or link belt for Paper machines or the like. with a multitude of coils made of elastic , Plastic o. Metal wire, made up of opposite one another Winding legs and these interconnecting head arches exist, in the spaces between each a head arch rter adjacent helix is inserted so far that An overlap area is created between the two coils, in which a Sfcoclriraht made of plastic or metal is arranged 1st, characterized, that the load-bearing winding legs (7) of the coils (2, 3, 4) have flat bearing surfaces (12), the width (13) of which is greater than the wire diameter (23) or the wire width (23a) of the head arch (17). 2. Flat structure according to claim 1, characterized in that the flat bearing surfaces (12) having the supporting ¥ lndungsschenkela (7) opposite winding leg (8) of the coils (2, 3 »4) have a round (9), an oval (9a) or a triangular (9b) cross section. 3. Flat structure according to claim 1, characterized in that both connected to one head bow (17) each Legs (7, 1Oj. of the coils (2, 5, 4) flat support surfaces (12) have » 4. Flat structure according to claims 1-3 characterized-ηβώ, that the wires (22) of the head arches (17) of the vendulae (2, 3 »4) an essentially round (20), oval (20a), triangular (20b), rectangular (20c), possibly squashed (21) cross-section compared to its original shape and the winding legs (7 »10), which have flat contact surfaces (12), have an almost rectangular outer» have section (11). 5. surface structure according to claims 1-4, characterized in that the width (13) of the flat bearing surfaces (12) having Yindun leg (7, 10) is up to twice as large as the wire diameter (23.) or the wire width (23a) t of the head arches (17). 6 Flat structure according to claims 1-4 4, characterized in that that the width (13) of the flat: contact surfaces (12) having winding legs (7, 10) is twice as large as or greater than the wire diameter (23) or the wire (23a) of the head arches (17). 7. Flat structure! according to the claims. 1-6 marked by the fact that the vendulae (2, 3, 4) are wound on a pitch. 8. Flat structure according to claims 1-7, characterized in that 4ie vendors (Z, 3, 4) have a tension spring-like bias ^ the fixed space (13) between their head arches (17) is larger than their wire diameter ~ nessei- (23 ) or their wire width (23a). 9 Flat structure according to claims 1-8 characterized thereby- net that the coils (2) alternately right or 2jlnksgänglge V # nd "l" (3, 4) 'are. 10), flat structure according to claims 1-8, characterized in that olle coils (2) are right-hand coils (3). 11. Flat structure according to claims 1-8, characterized in that äOle coils (2) are left-handed coils (4) ,, ■ 12 * Flat structure according to one or more of claims 1-11 characterized in that the winding legs (7) with the Pintle wires (25) an angle different from 90 ° ° *, the head arch (17) of the coils (2, 3, 4), however, an angle of about 90 °. '. 13 * Flat structure according to one or more of claims 1, - 12 $ characterized in that the edges (14) of the plane. On- i winding legs (7, 10) having location surfaces (12) f lying on top of each other. j 14. Flat structure according to one or more of claims 1-12 f characterized in that the edges (14) of the plane on "| winding legs (7, 10) having location surfaces (12) with js Distance (36) are arranged from one another. ! 15. + sheet-like structure according to claims 1 - 14 thereby marked | net that the distance (32) of the outer edges (19) next to each other -1 . " * Ig arranged head arches (17) is given by the double | , Wire diameter (23) or twice the wire width (23a) of the. I. Head arches (17) »the diameter (26) of the pintle wire (25) '■■ I. and the play (27) between the head arches (17) and the pintle ■ * wire (25) f which enables a hinge effect. 16. Flat structure according to claims 1-15, characterized in that in its edge fastenings (28) eyelets (29) or \. Lasn (35) are anchored for the introduction of thorns (30). | I · t » I · « tt Il • a ii * mil 17. Flat structure according to claims 1-15 characterized, draws that its edge fasteners (28) reinforcements for attack by pulling claws. , · Ι ■ s-