JPH0219583A - Method for forming reinforcing cord composed of two steel wires and reinforcing cord - Google Patents

Abstract

PURPOSE: To manufacture with a simple device and at low cost in manufacturing a rubber reinforcing cord consisting of two steel wires by winding one steel wire spirally around the other and then straightening the two wires together. CONSTITUTION: One steel wire 2 unwound from a reel 1 is put through the center hole of the other reel 3. The other reel 3 and the incidental flyer 5 are rotated around the axis of the steel wire 2, thereby winding the other steel wire 4, which is unwound from the reel 3, spirally around the steel wire 2. Both steel wires 2, 4 are put through a straightening area 7, desirably after a false-twist area 6, straightened out in their twisting state, and wound on a reel 9. The straightening area is constituted, for example, by arranging a large number of rollers in a zigzag.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to a method for producing reinforcing cords consisting of two steel wires for elastomer-split products, such as pneumatic tires, drive belts, conveyor belts, etc. Concerning the manufactured reinforcement cord.

Such reinforcing cords, which are twisted in one piece, are already known in numerous forms from the prior art.

DK-083317712 discloses a reinforcing cord with two twisted steel wires, the cross-section of which is rectangular with rounded corners. For example, the reinforcing cord can be compared with a reinforcing cord consisting of two circular steel wires twisted together.

BP-A-225055 and IP-A-23746
No. 2 also discloses a reinforcing cord consisting of two steel wires twisted together.

It is generally known that twisting steel wires together is a tedious process type. The equipment required for this is complex.

Since the single reel used is limited in terms of weight, the reel for making such reinforcement cords must be replaced frequently, or in the case of a large garage reel. The number of Kineki episodes must be lowered.

This results in a known reinforcing cord fc consisting of two steel wires.
If the crop is split, the following disadvantages will occur. That is, the investment costs associated with the rope manufacturing equipment used are high, which increases production costs.

Frequent equipment times (reel changes) likewise increase production costs.

Problems to be Solved by the InventionAn object of the invention is to provide a simple and economical method for producing a reinforcing cord with two steel wires, thereby making it possible to produce equivalent good quality products. It's about doing.

A further object of the invention is to provide a new reinforcing cord consisting of two steel wires, which is equivalent to the known reinforcing cord, and which can be produced economically.

Means for Solving the Problems According to the method of the present invention, the copper wire of one steel wire is wound around the circumference of the other fa4 as a wire method, and the drawing line is tied together. resolved by correction.

Advantageously, in the case of the reinforcing cord according to the present invention, the macrostructure of the wire rod composite is comparable to that of known reinforcing cords, but the wire rod composite structure can be compared with known reinforcing cords. Obvious differences in the surface microstructure begin to occur. However, such differences do not have an adverse effect on the properties of the reinforcing cord.The imitation of the macrostructure is particularly advantageous when one steel wire is wrapped around the other steel wire in a nine-fold manner. Later, the tonal lines are obtained in case A, which is subjected to a false twisting process before correction.

The reinforcing hood produced by the method described above is almost indistinguishable from known reinforcing cords in terms of macrostructure;
However, the reinforcing cord produced by the method according to the invention is distinguished from known reinforcing cords by the topographic marks on the surface of the steel wire in the microscopic range, which marks are necessarily caused by the preceding drawing process. (e.g. a slight stretcher strain produced by the final drawing die).

In the case of the reinforcing cord according to the present invention, based on microscopic photography of the surface of the steel a, the parallel lines! l! It has been confirmed that the twisted steel wires are either not twisted at all or only slightly twisted, and in this case the twist of the twisted wire method is several times larger than that of the spiral wound steel wire, whereas the twist of the other steel wire is is at least hardly twisted.

In the case of reinforcing cords in which two steel wires are twisted together in the known manner, the drawing wires are themselves twisted, the twisting approximately corresponding to the mutual twisting of the steel wires.

Furthermore, the aforementioned problem was solved by a reinforcing cord produced by the method according to the invention. This reinforcing cord clearly differs from known reinforcing cords as mentioned above.

The reinforcing cord according to the invention has two
Constructed from real steel wire. However, it can be advantageously constructed if both @# lines are identical, in particular if the contour bars have the same diameter, preferably in the range from 0.15 am to 0.5 mm.

Advantageously, the reinforcing cord according to the invention is wound around the other steel wire with a pitch corresponding to 10 to 100 times the diameter of the steel wire. It will be done.

Furthermore, reinforcement coat 'o steel @75525 CIQ N/
Advantageously, it has a strength of between 4000 N/ax".

According to the method according to the invention, it is possible to produce a reinforcing cord whose twist direction is an 8-twist direction or an N-twist direction.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows an apparatus for carrying out the method according to the invention. A steel wire 2 is drawn out from the reel 1 in the tangential direction, and around this steel wire is wound a spiral steel wire 4 drawn out from a rotating reel 3 through a head using a flyer 5. It will be done. The type of winding of the straight steel wire is indicated by an arrow. The cutting lines are passed together through the false-twisting zone 6 and the straightening zone γ, and then the finished reinforcing cord 8 is wound onto a reel 9.

FIG. 2 schematically depicts another device t which also carries out the method according to the invention. As is apparent from the reference numerals, many of the components correspond to those of FIG. In this case, only the steel wire 2 is connected to the reel 11 via the head.
drawn from. As a result, the steel wire 21 is subjected to a slight twist υ which is several times smaller than the twist carried out by the spiral steel wire, so that the reinforcing cord created thereby is indicated by reference numeral 81.

FIG. 6 schematically shows a method according to the invention and another device implemented by means of two circular steel wires. Steel wire 2 from vertically or horizontally arranged reel ■ 1 (shown horizontally in Figure 6)! is the head (
(not shown) or tangentially in the case of a horizontal arrangement, around which a tall steel wire is drawn. The straight steel wire is drawn tangentially through the vertically located reel 3 through the head or (not shown) from the horizontally located reel: the shin tsurakatsu steel wire is used as a flyer disk 10. The VC can be guided so that it rotates around the reel llIc. The reinforcing cord to be installed is designated by reference numeral 81.

FIG. 4 shows characteristic cross sections at 0 degrees, 90 degrees, 180 degrees and 270 degrees during one pitch for a reinforcing cord according to the invention, and FIG. 0 degree, 90 degree, 180 degree and 2 in the edge
A characteristic cross-section at 70 degrees is illustrated.

Reinforcement cord w4 according to the present invention according to FIG.
The gland is designated 4 and the other steel wire is designated 2.

Symbolically, one topographical mark for a straight steel wire (e.g. stretcher stray/) is designated by the number 12 and a topographical mark on the surface for the other steel wire is designated by the number 11. . As is clear from FIG. 4, the tone lines are shown without twisting. Such a reinforcing cord can be obtained theoretically using the device according to FIG.

When using the apparatus 5 according to FIGS. 2 and 6, the topographical markings 11 for the other steel wire 2 extend from the illustrated position of 0° to the 360° position (not shown) F.
There is a difference of about 1,000.

For comparison, FIG. 5 shows a known reinforcing cord in which steel wires 13 and i4 are twisted together. In this case too, two topographic marks are symbolically shown, namely mark 15 for steel wire 13 and mark 1 for steel wire 14. As can be seen from the four characteristic cross-sections shown based on the topographical markings 15% 16, the known reinforcing cord Bah steel, wire 13.
14 is first twisted over one pitch with all the centers of the individual axes.

Therefore, the reinforcing cord according to the present invention is different from the known reinforcing cord.
It's clearly different.

For example, two steel wires with a diameter of 1,3 vIts are twisted in a mutually L-h manner according to the published method V so that these steel wires have a length of 14 thrt pitch, and the false twist is n. Corrected. The properties of the reinforcing cords that have been used are shown in the following table as a ratio of 2 x 0.3 [M code].

A reinforcing cord according to the invention was obtained by winding a 0-3u1 filament wire with a length t of one pitch 14 blades around a steel wire having a diameter of 0.3 silk. The drawing lines are falsely twisted together and straightened.

The properties of the obtained reinforcing cord are shown in the following table as IXo, 3+1x0.3 ζ reinforcing cord according to the invention.

table Pitch (tomo) Diameter (12m) Linear density (ktex) Breaking force (N) Stretching rate (excellent) Strength degree (N/ktex) Single line behavior 1 Xo, 3+I XU, 3 U, 61 2. Mouth 6 As shown in Figure 4 2 X [j, 3 0.61 2, U6 As shown in Figure 5

[Brief explanation of the drawing]

FIG. 1(d) is a schematic diagram of an apparatus for carrying out the method according to the invention; FIG. 2 is a schematic diagram of a further apparatus for carrying out the method according to the invention; FIG. - a schematic diagram of another apparatus for carrying out the invention; FIG. 4 is a diagram showing the position of the drawing line of the wire rod composite in the characteristic lateral front of the one-pitch length of the reinforcing cord according to the invention; Figure 5 is a diagram corresponding to Figure 4 of the classification reinforcement code. 1.1' 1ri3.9...Reel, 2.212
Lmq wire, 4.41 411, , L steel wire, 5-
7 layer, 6...false twist area, 1...straightening area, 8
．． 818I]... Reinforcement cord, 11.12.15.1
S...mark, 13.14...As is clear from the wire table, the reinforcing cord according to the invention is equivalent in all properties to the comparative cord, but is clearly distinguished by the topographical marks on the surface of the steel wire. are different. Figure 4! ) Steel wire Figure 5 E)

Claims (1)

[Claims] 1. One steel wire (4, 4^I, 4^II) is wound around the other steel wire (2, 2^I, 2^II) as a spiral body, and both A method for producing a reinforcing cord consisting of two steel wires for products made of elastomers, characterized in that the steel wires are straightened together. 2. The method according to claim 1, wherein both steel wires are false-twisted before being straightened. 3. A reinforcing cord made of two steel wires, produced by the method according to claim 1 or 2. 4. The reinforcing cord according to claim 3, wherein the steel wire diameters of both steel wires are the same size. 5. The reinforcing cord according to claim 3 or 4, wherein the steel wire has a diameter of 0.15 mm to 0.5 mm. 6. The reinforcing cord according to any one of claims 3 to 5, wherein the wire body is wound around the other steel wire at a pitch corresponding to 10 to 100 times the diameter of the steel wire. 7. Steel wire is 2500N/mm^2 to 4000N/mm
The reinforcing cord according to any one of claims 3 to 6, having a strength of ^2.