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Steel wire and automobile tyre

A steel wire and monofilament technology, used in special tires, tire parts, reinforcement layers of pneumatic tires, etc., can solve problems such as protruding volume increase, detachment, fatigue fracture, etc., to prevent helical or wavy bending from disappearing, The effect of reducing the drop in the resistance of the load and suppressing the stretching of the wire

Active Publication Date: 2012-05-16
TOKUSEN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in order to solve this problem, when increasing the bending height, such as Figure 14 As shown, a part of a monofilament having a small helical or wavy bend protrudes from the monofilament to a greater extent, and the protrusion caused by the protrusion is discontinuous in the longitudinal direction, and the stress is concentrated on the protrusion, which becomes the starting point and causes High probability of fatigue fracture
In addition, if there are such discontinuous large protrusions in the length direction, in the kneading process of rubber product processing, the wire will not vibrate along the roller surface or the fixed rod surface, which not only becomes the arrangement of the wire in the length The cause of unevenness in direction, and sometimes the cause of accidents in which the wire is detached from the roll

Method used

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  • Steel wire and automobile tyre
  • Steel wire and automobile tyre
  • Steel wire and automobile tyre

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0055] figure 1 is a sectional view of the steel wire according to the first embodiment of the present invention, figure 2 It is a diagram showing the trajectory of the monofilament on the projected plane when the monofilament having a bend after twisting the steel wire is arranged horizontally and projected on the horizontal plane.

[0056] The steel wire of this embodiment, such as figure 1 As shown, for example, in a steel wire 110 of 1×3 construction formed by twisting three monofilaments 111, 112, 113 (filaments), one monofilament 111 is a small The other two monofilaments 112, 113 are monofilaments with straightness (normal filaments) without bending except for the helical bending for wire twisting. The twisted part is formed by firmly twisting the monofilaments in such a way that they are roughly close to each other. Here, the small helical bend is a three-dimensional helical bend. The direction of the helical bending may be the same as or opposite to the twistin...

no. 2 approach

[0075] image 3 is a sectional view of a steel wire according to a second embodiment of the present invention, Figure 4 It is a diagram showing the trajectory of the monofilament on the projected plane when the monofilament having a bend after twisting the steel wire is arranged horizontally and projected on the horizontal plane.

[0076] The steel wire of this embodiment, such as image 3 Shown is a steel with a 3+9 structure consisting of a core twisted, for example, three core monofilaments 211a-211c (steel wires) and nine sheath monofilaments 212a-212i (steel wires) twisted around the core. In the thread 210, the core is formed by densely twisting three core monofilaments 211a to 211c using straight monofilaments (normal threads) that have no bends other than the helical bends used for thread twisting, and the sheath passes through nine sheath singles. Three of the sheath monofilaments 212a, 212d, 212g among the filaments 212a-212i are monofilaments (curved monofilament...

no. 3 approach

[0094] Figure 5 It is a sectional view (a) of a steel wire of an example of the third embodiment of the present invention and a sectional view (b) of a steel wire of another example, Image 6 It is a diagram showing the trajectory of the monofilament on the projected plane when the monofilament having a bend after twisting the steel wire is arranged horizontally and projected on the horizontal plane.

[0095] The steel wire of this embodiment, such as Figure 5 As shown in (a), for example, three core monofilaments 311a to 311c are arranged in the core, and nine sheath monofilaments 312a to 312i (steel wires) are arranged around it, and these core monofilaments 311a to 311c and sheath monofilaments are arranged 312a to 312i are steel wires 310 of 3 / 9 structure twisted at the same pitch in the same direction at the same time, and the core monofilaments 311a to 311c are straight monofilaments without bending except for the helical bending used for wire twisting ( normal filam...

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Abstract

By adjusting line periphery extruding amount of monofilaments having small twist or wave-shaped curves in advance and of at least one monofilament (111) of a 1n steel lines (110), at least one of sheath monofilament (212a-212i) of steel lines (210) having a m+n structure, or at least one of sheath monofilament (312a-312i) of steel lines (310) having a m / n structure, one can ensure that positions with a ratio L / d more than 0.7 do not exist at the whole monofilament perigon and more than two positions having a ratio L / d in the range of 0.07-0.7 exist at each space between twist helixes, whereinL represents a deviation amplitude between the track of monofilaments (111) which have been twisted up and have curves at a projection plane and a datum line of helix curve used in thread twisting, and d is a monofilament diameter. Therefore, rubber product reinforced steel cords exhibiting enough rubber accessibility and excellent fatigue resistance and tires for vehicles using said steel cordsare obtained.

Description

technical field [0001] The present invention relates to a steel wire used as an embedding reinforcement material for rubber products such as automobile tires, and in particular to a steel wire having both sufficient rubber penetration and excellent fatigue resistance, and an automobile tire using the steel wire. Background technique [0002] As steel wires for reinforcing rubber products such as automobile tires and conveyor belts, for example, steel wires of a closed twist structure (so-called closed type) in which 3 to 6 monofilaments (steel wires) are densely twisted in a single layer has been widely used. The steel wire is formed into a composite sheet after a plurality of parallel parallel wires are covered with a rubber material, and then embedded in the rubber product. Therefore, the steel wire twisted with three steel wires is called a 1×3 structure. In addition, according to the single wire Quantity, and called 1 × 4, 1 × 5, 1 × 6 structure, usually called 1 × n st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/48D07B1/06D07B1/10B29C70/20B60C1/00B60C9/00
CPCD07B1/0646D07B2201/2022D07B2201/2008D07B2201/2007
Inventor 石井功藤田昌也
Owner TOKUSEN IND CO LTD