EP2218810A1 - Diagonal interlace - Google Patents

Abstract

The band has fixed edges (12) and diagonal threads (22) provided between the fixed edges. A preventing device preventing expansion of length is fixedly connected with the band by bonding or joining and is not plaited with the band. The device consists of woven fabrics and yarns (18). Elastic filaments (20) run and expand in a longitudinal direction. The filaments consist of synthetic or natural elastic materials. The band consists of carbon fibers, glass fibers, aramid fibers, hybrid fibers or roving.

Description

The invention relates to a Diagonalflechtband with solid edges and intervening diagonal threads.

Such Diagonalflechtbänder are known. They are dimensioned according to the application purpose and are used e.g. used as reinforcing materials of fiber reinforced plastic components.

Due to the course of the diagonal threads, it is possible that the desired width of the Diagonalflechtbandes is reduced at tensile load.

The invention is therefore an object of the invention to provide a Diagonalflechtband of the type mentioned, in which a technically simple means a width change is prevented.

This object is achieved according to the invention in the Diagonalflechtband of the type mentioned by a device which is firmly connected to prevent longitudinal expansion with the Diagonalflechtband, but not interlaced.

The gist of the invention is to safely prevent elongation in the longitudinal direction of the band by having means resisting longitudinal expansions.

In this case, a device consist of a woven, knitted fabric, scrim, knits, crochet or made of another textile technology thread or fabric, with a portion of the threads runs in the tape direction and thus prevent stretching in the longitudinal direction.

Thus, if possible, the entire width is ensured at tensile load of Diagonalflechtbandes, it is advantageous if the fabric, knitted fabric, scrim, knitted fabric, crochet or other textile technologies, the same width as the Diagonalflechtband has.

Another possibility for a device for preventing the longitudinal expansion consists of at least one longitudinally extending and fixed thread.

In this case, a greater expansion stiffness and shear stiffness can be achieved when a plurality of longitudinally extending threads or bundled in thread strands are present.

Since in the production of Diagonalflechtbänder these are produced with a width which does not correspond to the later desired width and is smaller, it is advantageous if in the diagonal braid several longitudinally extending and stretchable elastic filaments are present, up to the desired width of Diagonalflechtbandes proportionately or completely relax.

A further embodiment of the invention provides that in the Diagonalflechtband the diagonal threads an angle to the solid edges of 20 ° to 70 °, preferably about 45 °.

There are certainly a variety of ways to connect the device or facilities, certainly with the Diagonalflechtband. These can be joined together by lamination, joining or gluing.

It may happen that the component to be reinforced with the diagonal braiding strip either has holes or notches in the course of the diagonal braiding strip. However, it is then advantageous if contours matched to the component are present, which have the same number of diagonal threads, an equal or unequal number of fabric threads, threads or thread strands, such as the remaining diagonal braid strip and the rest of the device. This ensures that the reinforcement used diagonal braid tape is not damaged in these areas and retains its full strength.

For the filaments a variety of elastic materials is possible. However, it is advantageous if the filaments consist of synthetic or natural elastic material.

Also for the individual threads of Diagonalflechtbandes and the device, there are a variety of materials. Carbon fibers, glass fibers, aramid fibers and hybrids and the resulting rovings or yarns have proven particularly advantageous since they have a very high strength after completion of the component.

Further features and advantages of the invention will become apparent from the following description of several embodiments and from the figures to which reference is made.

Fig.1:

eine schematische Draufsicht auf ein Geflecht ohne eine Einrichtung zur Verhinderung der Längsdehnung des Diagonalflechtbandes;

Fig.2:

eine schematische Draufsicht auf ein Gewebe als Einrichtung zur Verhinderung der Längsdehnung des Diagonalflechtbandes;

Fig.3:

eine schematische Draufsicht auf ein Diagonalflechtband mit unidirektional in Bandrichtung verlaufenden Fäden bzw. Fadensträngen sowie der elastischen Filamente; und

Fig.4:

eine der Fig.3 ähnliche Ansicht mit einander gegenüberliegenden Konturen.

Show it:

Fig.1:

a schematic plan view of a braid without a means for preventing the longitudinal expansion of Diagonalflechtbandes;

Figure 2:

a schematic plan view of a fabric as means for preventing the longitudinal expansion of Diagonalflechtbandes;

Figure 3:

a schematic plan view of a Diagonalflechtband with unidirectional running in the tape direction threads or thread strands and the elastic filaments; and

Figure 4:

one of the Figure 3 similar view with opposite contours.

Based on FIGS. 1 to 4 Now several embodiments of a Diagonalflechtbandes 10 will be described. All embodiments have in common that the Diagonalflechtbänder 10 fixed edges 12, between which the diagonal threads 22 extend, and are provided with a device 14 for preventing longitudinal expansion of the Diagonalflechtbandes 10. It should be noted that in the figures, like reference numerals mean the same or similar features unless otherwise stated.

In Fig.2 For example, a device 14 with a fabric 16 made of woven fabric 16a is shown. The term "fabric 16" can also be understood to mean braids, knitted fabrics, scrims, knits, crochets or thread structures or fabrics produced from another textile technology, which are constructed in such a way that they allow no or barely <4% maximum tensile elongation in the longitudinal direction.

A further exemplary embodiment of a device 14 is at least one thread 18 extending in the longitudinal direction and fastened to the diagonal braiding strip 10.

Of course, a plurality of longitudinally extending threads 18 may be present. An even greater strength is given when 18 thread strands 18a are used instead of the individual threads. This is particularly vivid in Figure 3 shown.

Since in the production of Diagonalflechtbandes 10 is operated with such a tensile stress, that while the width does not correspond to the ultimately desired width b, but is smaller, the Diagonalflechtband 10 must still be brought to the desired width b after the manufacturing process.

In the present embodiment, this is done by having a plurality of longitudinally extending and stretchable elastic filaments 20 in the diagonal braid tape 10. These filaments 20 are then proportionally or completely relaxed at the desired width b of the Diagonalflechtbandes 10. Other stretching methods are also possible.

It is advantageous if the filaments 20 consist of synthetic or natural elastic material.

Furthermore, all embodiments of the diagonal braiding strip 10 have in common that the diagonal threads 22 have an angle α to the fixed edges 12 or to a perpendicular to the fixed edge 12 of 20 ° to 70 °, preferably about 45 °.

Further, all means 14 for preventing the longitudinal expansion of the finished diagonal braiding tape 10 in this case are connected to the diagonal braid tape 10 by means of lamination. But there are also other possibilities, of which some examples, in particular joining and gluing, have been mentioned at the beginning.

Another exemplary embodiment, not shown in the figures, of a diagonal braiding strip 10 has contours adapted to the component. At the in Figure 4 shown and described embodiment, opposing contours in the form of recesses 24 are present.

A special feature in these embodiments is that the Diagonalflechtband 10 between the contours 24 have the same number of diagonal threads 22, the same or different number of fabric threads 16a, threads 18 or thread strands 18a, as the rest Diagonalflechtband 10. However, this is not a mandatory requirement , The means 14, which is not shown in the figures, may also have the width of the usual Diagonalflechtbandes 10 in about. In Fig. 4 the first variant of this embodiment is shown.

In this context, it should also be noted that the angle α of the diagonal threads 22 between the contours 24 is either equal to the other angle α, but can also assume different values.

For the individual threads of Diagonalflechtbandes 10 and the device 14, there are a variety of materials. However, it has proven to be of particular advantage, in particular with regard to the strength, if the diagonal braiding strip 10 and the device 14 consist of carbon fibers, glass fibers, aramid fibers and / or hybrid fibers and / or rovings or yarns produced therefrom.

According to the invention, therefore, there is provided a diagonal braid tape 10 which, after being reinforced by means 14 for preventing longitudinal elongation, provides easy laying and integration into the component.

LIST OF REFERENCE NUMBERS

10

Diagonalflechtband

12

solid edge

14

Facility

16

tissue

16a

tissue thread

18

thread

18a

thread strand

20

filament

22

Diagonal thread

24

Perfectly close

b

width

α

angle

Claims (11)

Diagonal braiding tape (10) having fixed edges (12) and diagonal threads (22) therebetween, characterized by means (14,16,18) fixedly connected to the diagonal braid tape (10) but not interlaced to prevent longitudinal stretching. Diagonal braiding strip (10) according to claim 1, characterized in that the device (14) consists of a fabric (16), knitted fabric, scrim, knitted fabric, crochet or fabric made of another textile technology thread or fabric. Diagonal braiding strip (10) according to claim 2, characterized in that the fabric (16), knitted fabric, scrim, knitted fabric, crochet or made of other textile technology thread or fabric, the same width (b) as the Diagonalflechtband (10) , Diagonal braiding strip (10) according to claim 1, characterized in that the device (14) consists of at least one longitudinally extending and fixed thread (18). Diagonal braiding strip (10) according to claim 4, characterized in that a plurality of longitudinally extending threads (18) or in thread strands (18a) are bundled. Diagonal braiding strip (10) according to one of claims 1 to 5, characterized in that in the Diagonalflechtband (10) a plurality of longitudinally extending and stretchable elastic filaments (20) are present, which at the desired width (b) of Diagonalflechtbandes (10) then relax proportionally or completely. Diagonal braiding strip (10) according to one of claims 1 to 6, characterized in that in the diagonal braiding strip (10) the diagonal threads (22) form an angle (α) to the fixed edges (12) of 20 ° to 70 °, preferably about 45 ° ° have. Diagonal braiding strip (10) according to one of claims 1 to 6, characterized in that the device (14,16,18) by means of lamination, joining or gluing with the Diagonalflechtband (10) is connected. A diagonal braiding tape (10) according to any one of claims 1 to 8, characterized in that there are contour fits (24) comprising the same number of diagonal threads (22), the same or different number of fabric threads (16a), threads (18) or thread strands (18a), such as the remaining diagonal braid tape (10) and the remainder of the device (14, 16, 18). Diagonal braiding strip (10) according to one of claims 6 to 9, characterized in that the filaments (20) consist of synthetic or natural elastic material. Diagonal braiding strip (10) according to one of claims 1 to 10, characterized in that it is made of carbon fibers, glass fibers, aramid fibers and / or hybrid fibers and / or rovings or yarns produced therefrom.

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