DE8029762U1 - Single-strand wire rope suitable for reinforcing elastomeric products - Google Patents

Description

Il Mtl

Single-strand suitable for reinforcing elastomeric products Wire rope

The present invention relates to a reinforcement for elastomer products, in particular motor vehicle tires, pressure hoses, Conveyor belts, among other things, suitable single-strand wire rope.

It is known to use metal etching for reinforcing and reinforcing deformable goods made of rubber-like material. These consist of several, usually 3, 4 or 5 twisted, individual metal wires, whereby the metal wires to increase the adhesive force between the metal braid and the rubber-like material, preferably coated with brass are. The manufacture of these strands is based on very thin steel wires, which generally have a diameter between 0.10 and 0.40 mm. These wires become the ones described by means of a single rotating device Strands united.

The requirements placed on these metal etching relate to Tensile stresses, bending loads, axial compressions, but also internal wear, corrosion, fatigue and other loads.

Due to the advancing development, mainly in the automotive tire construction, various corrosion-promoting interventions in transport such as the salting of icy roads, as well as the general forms of economy in the cost prices, manufacturers are forced to use new strand designs. And that is one of the desired properties new types of strand the total wettability of the steel part by the elastomer part. To this property To realize, one has, as described in DE-OS 26 19 086, aimed for a structure of the strand that is as open as possible. The advantage of this metal strand is based on the principle of a structure that is as open as possible and the result increased wettability, whereby the strength of the wires integrated in the construction is as high as possible should come. ■ -

The rope described in said DE-OS consists of helically shaped wires and one or more individual wrapping wires made of steel, which are wound onto two or more individual core wires made of steel, but they are not wound around each other themselves. The core wires are of the same helical shape. You are so arranged next to one another and against one another, that each of the core wires with at least one other core wire in a linear manner Contact is, with the line of contact running parallel to the direction of the core wires and the wrapping wires are helical.

The aim of the invention was to propose a reinforcement rope to be produced in a lightweight construction, the one has a completely open stranded shape and in which the strength of all wires going into the construction in general fully supports.

This goal is achieved by the wire rope according to the invention, which is characterized in that three are arranged parallel to one another and generally lie in a planar plane Steel wires form an untwisted strand and wrapped in a fourth steel wire with such a lay length is that the length of the fourth wire exceeds the total rope length by at most 3%, with at least two of the three parallel wires are crossed at least once on a section of no more than cm and all wires are in front of molded and pressed together form.

The three parallel wires and the fourth wire preferably have identical diameters, which are generally between 0.10-0.40 mm.

Since, according to the invention, the three parallel wires next to one another lie and the fourth wire surrounding it has a great length of lay, it is one, the Practically completely open construction that satisfies requirements with regard to wettability.

The three parallel wires touch each other due to the inventive Construction form essentially via linear contact surfaces.

Furthermore, by the form of construction of the invention Metal braid, in which all of the wires are carried along, show a lower loss compared to known constructions Reached breaking strength, which leads to an increase in fatigue strength, but with the modulus of elasticity is not significantly changed compared to conventional constructions.

In the relieved state, the processed metal strand is twist-free and straight of calendered layers created an ideal prerequisite for car tire construction.

The freedom from twist and straightness result from the following combined measures during manufacture: - The three parallel wires lying in a plane plane are exchanged with one another according to certain lengths, which means length and quality differences are also compensated for at the same time;

- The wrapping wire is pressed firmly against the parallel wires and exposed to a pre-deformation together with them.

This type of production of the constructed according to the invention Metal strand gives this a very high mechanical stability.

Further advantages and features emerge from the description of the drawings, in which FIGS. 1, 2 and 3 show cross sections through conventional wire strands; the Fiq. Figure 4 is a view of the structure shown in Figure 2 ; FIG. 5 shows a cross section through the wire rope according to the invention, while FIG. 6 shows a view of the same.

In the case of the previously known metal strands shown in FIGS. 1, 2, 3 and 4 , 3, 4 or 5 form twisted together

^l > «, wires a strand. These all have a center that

^ forms a free space and to the disadvantages described

leads.

In contrast to these known designs, the metal strand according to the invention has a completely open construction in its cross-section shown in FIG Gain stability.

This wrapping is illustrated in FIG. 6 , the lay length and the phase being selected in such a way that there is no bulging of the strand at the intersection of the three parallel wires.

As can be seen, the construction of the braid according to the invention shown in FIGS. 5 and 5 , in contrast to twisted braids, is completely open and, during calendering, allows complete wetting by rubber-like material of all of the wires involved in it; there are no central cavities. The rubber-like material can wet anywhere, with the result that the metal wires are permanently protected against corrosion and the adhesion to the rubber-like material, which is considerably impaired by them, is prevented.

Since the rubber-coated parallel wires only had line contact, the wear resistance is reduced and there, As already stated, the individual, processed wires are generally full of their strength for the quality of the braid contribute, this results in a strand with the smallest possible diameter, which is inexpensive with calendered material affects.

The strand is made in a simple way, which fully meet the economic requirements and quite enough.

Claims (7)

sayings 1. Suitable for reinforcing elastomeric goods, especially vehicle tires, pressure hoses, conveyor belts single-strand wire rope, characterized in that three parallel to one another, generally in (12 3) steel wires lying on a plane plane / one untwisted Form a strand around which a fourth steel wire / is wrapped.
10 2. Steel wire rope according to claim 1, characterized in that 7 Δ) indicates that the length of the fourth wire / exceeds the entire rope length by a maximum of 3%. 3. Steel wire rope according to claims 1 and 2, characterized in that at least two of the three parallel Wires / on a section of at least 15 cm at least are crossed once. 4. Steel wire rope according to claims 1-3, characterized by (1 2 3 4) indicates that all wires ' / are pre-deformed and pressed into one another. 5. Steel wire rope according to claims 1-4, characterized (1 2 3) indicates that the three parallel wires / as well as the (4) fourth wire / preferably have identical diameters. 6. Steel wire rope according to claims 1-5, characterized in that that the wire diameter is between 0.1 and 0.4 mm. 7. Steel wire rope according to claims 1-6, characterized in that that the length of the lay and the 04)
phase of the fourth wire / between the intersections of the three parallel wires /.