CN103485216B

CN103485216B - There is the compound steel cord of 4+10+16 structure

Info

Publication number: CN103485216B
Application number: CN201310387429.6A
Authority: CN
Inventors: 刘祥; 胡自明; 翟培云; 杭卫明; 刘天亮; 冯国兵
Original assignee: Jiangsu Xingda Steel Tyre Cord Co Ltd
Current assignee: Jiangsu Xingda Steel Tyre Cord Co Ltd
Priority date: 2013-08-30
Filing date: 2013-08-30
Publication date: 2016-10-19
Anticipated expiration: 2033-08-30
Also published as: CN103485216A

Abstract

The invention discloses a kind of compound steel cord with 4+10+16 structure, including central core, intermediate layer and outer layer, described central core is made up of four silk threads of a diameter of d1 with lay pitch p1 helical assembly, ten silk threads of the most a diameter of d2 are wound in a spiral in around described central core with lay pitch p2, and in described outer layer, ten six roots of sensation silk threads of a diameter of d3 are wound in a spiral in around described intermediate layer with lay pitch p3.The structural integrity of this steel cord, stable performance, intensity is high, and load-carrying is strong by ability, corrosion resistance and good, and security performance is high.

Description

There is the compound steel cord of 4+10+16 structure

Technical field

The present invention relates to the steel cord used in pneumatic tire, particularly relate in a kind of large-scale load vehicle tyre The intensive steel cord used.

Background technology

The selection of all-steel load-bearing radial tire body cord, in addition to considering carcass strength, it is also contemplated that sidewall is held By repeatedly subduing deformation.Therefore, body cord should have higher Fracture Force, fatigue performance and wearability Energy.At present the steel cord of 3+9+15 × 0.175+0.15 structure in all-steel load-bearing radial tire carcass general partially Using, along with social progress, large-scale load-carrying vehicle arises at the historic moment, it is desirable to radial heavy duty tire carcass has accordingly Bearing capacity, this has higher requirement to as the production of carcass steel cord in pneumatic tire, in Department of Intellectual Property of state discloses CN201080029415.1 mono-kind and has three layers (C1+C2+C3) of 2+M+N structure Metal cords, it carries out original place rubber processing, and includes ground floor or central core (C1), the second layer (C2) With third layer (C3), described ground floor or central core (C1) by two of a diameter of d1 with lay pitch p1 helical assembly Root silk thread forms, and the M root silk thread of a diameter of d2 in the described second layer (C2) is wound in a spiral in institute with lay pitch p2 Stating central core (C1) around, the N root silk thread of a diameter of d3 in described third layer (C3) is with lay pitch p3 helical coil Being wound on around the described second layer, described cord is characterised by, its have the property that (d1, d2, d3, p1, P2 and p3 represents with mm): 0.08≤d1≤0.50；0.08≤d2≤0.50；0.08≤d3≤0.50；3 ＜ p1 ＜ 50；6 ＜ p2 ＜ 50；9 ＜ p3 ＜ 50；On the cord of any 3cm length, it is referred to as " filled rubber " Rubber compound be present on the one hand by 2 silk threads and the described second layer (C2) of described ground floor (C1) M root silk thread limit, on the other hand by M root silk thread and the N of described third layer (C3) of the described second layer (C2) In each capillary tube that root silk thread limits；In described cord, the content of filled rubber is between 10 and 50mg/ gram of curtain Between line.It is known that when tire is advanced, the cord of layering stands heavily stressed, particularly stands repeatedly Bending or the change of curvature, this produces friction on silk thread, particularly comes from contact between adjacent layer Friction, and it is thus subject to abrasion and fatigue, therefore cords of these layerings must have so-called " abrasion Tired " high patience.Layering cord also will as much as possible with rubber impregnated they so that this material oozes completely Penetrate in all spaces between the silk thread of composition cord.If it practice, described infiltration is insufficient, then Empty passage is formed along cord, and the caustic of readily permeable tire (such as water or the even oxygen in air) is such as Move into the carcass of tire along the passage of these skies due to otch.Use compared in dry atmosphere, The existence of dampness causes the acceleration of corrosion, " corrosion fatigue " phenomenon occurs, and fatigue phenomenon causes the machine of cord The gradually degeneration of tool character, and the life-span of these cords can be affected under the most harsh driving conditions, thus reduce The service life of tire.

Summary of the invention

It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of high-performance, corrosion resistance and good, Lifting capacity is strong, and what security performance was high has the compound steel cord of 4+10+16 structure.

The present invention is achieved by the following technical solution:

There is the compound steel cord of 4+10+16 structure, including central core, intermediate layer and outer layer, described in Central layer is made up of four silk threads of a diameter of d1 with lay pitch p1 helical assembly, the most a diameter of d2 Ten silk threads be wound in a spiral in around described central core with lay pitch p2, a diameter of d3 in described outer layer Ten six roots of sensation silk threads are wound in a spiral in around described intermediate layer with lay pitch p3.

Lay pitch p3 of the lay pitch p2 ＜ outer layer in the lay pitch p1 ＜ intermediate layer of described central core.

The diameter of the diameter d2=outer filaments of the diameter d1=intermediate layer filaments of described central core silk thread d3=0.175mm。

Described central core to identical with the sth. made by twisting in intermediate layer, twisted with the fingers and is twisted with the fingers to for S；The sth. made by twisting of described outer layer to in Interbed is contrary, twists with the fingers and twists with the fingers to for Z.

The section of described four silk threads of central core is diamond structure.

Lay pitch p1 of described central core is 5.0 ± 0.25mm, lay pitch p2 in intermediate layer is 10.0 ± 0.50mm, lay pitch p3 of outer layer is 16.0 ± 0.80mm.

The present invention compared with prior art has the advantages that

1, by keeping or improve the mechanical property of silk thread, reduce silk thread consumption, thus reduce tire weight, Reduce production cost；

2, by change steel cord structure, formed 4+10+16 structure compound steel cord, central core and in Interbed two-layer is twisted with the fingers to identical, improves fatigue performance, and the sth. made by twisting of outer layer, to contrary with intermediate layer, is formed certain Gap, improve strike-through performance, corrosion resistance is strong, the structural integrity of steel cord, stable performance；Use High-tensile steel wires, intensity is high, and load-carrying is strong by ability, and security performance is high.

3, without outer winding structure, can avoid, without outer wrapping wire, the bonding that the abrasion of cover wire causes by outer wrapping wire Power is destroyed.

4, steel cord diameter is less, it is possible to achieve the increase of cord density, improves the wearability of tire and wears well Thorn property.

Accompanying drawing explanation

Fig. 1 is the section structure schematic diagram of the embodiment of the present invention.

Sequence number in figure: 1, central core, 2, intermediate layer, 3, outer layer.

Detailed description of the invention

Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in further detail.

Shown in Figure 1, a kind of compound steel cord with 4+10+16 structure of the present invention, by 30 silks Line is compiled sth. made by twisting and is formed, and the cross section of silk thread is circular；Including central core 1, intermediate layer 2 and outer layer 3, described in Central layer 1 is compiled sth. made by twisting by twist with the fingers form to S sth. made by twisting, lay pitch 5.08mm, four silk thread of a diameter of 0.175mm, institute The section of 1 four silk threads of central core stated is diamond structure；In intermediate layer 2 the 0 of a diameter of 0.175mm Root silk thread is wound in a spiral in central core 1 around to twist with the fingers in the way of S sth. made by twisting, lay pitch 10.26mm；Described In outer layer 3, ten six roots of sensation silk threads of a diameter of 0.175mm are to twist with the fingers spiral in the way of Z sth. made by twisting, lay pitch 16.06mm Be wound on around intermediate layer 2, the section of these 30 silk threads of steel cord be circular configuration, cord diameter 1.13mm, Fracture Force 2040N.

The present invention and the comparison of 3+9+15 × 0.175+0.15 cord structure:

The Fracture Force of the present invention, than 3+9+15 × 0.175+0.15 cord height 200N, makes the anti-fatigue performance of tire Have with wear resistance and be greatly improved, the service life of the tire of raising.

Embodiment, only to facilitate understand technical scheme, is not intended that scope Restriction, every without departing from technical solution of the present invention perhaps according to the technical spirit of the present invention to top Any simple modification, equivalent variations and the modification that case is made, within all still falling within scope.

Claims

1. there is the compound steel cord of 4+10+16 structure, including central core (1), intermediate layer (2) with outer layer (3), it is characterized in that: (1) described central core is made up of four silk threads of a diameter of d1 with lay pitch p1 helical assembly, intermediate layer (2) in ten silk threads of a diameter of d2 be wound in a spiral in lay pitch p2 described central core (1) around, described outer layer (3) in ten six roots of sensation silk threads of a diameter of d3 be wound in a spiral in lay pitch p3 described intermediate layer (2) around；A diameter of 1.13 ± 0.06mm of described steel cord；Described central core (1) with intermediate layer sth. made by twisting (2) to identical, twist with the fingers and twist with the fingers to for S；Described outer layer sth. made by twisting (3), to the most contrary with intermediate layer, twisted with the fingers and is twisted with the fingers to for Z；And lay pitch p3 that the lay pitch p2 ＜ outer layer that the lay pitch p1 ＜ intermediate layer that described central core is (1) is (2) is (3)；The diameter d3=0.175mm of the diameter d2=outer layer (3) silk thread of the diameter d1=intermediate layer (2) silk thread of described central core (1) silk thread；The section of described central core (1) four silk threads is diamond structure；And lay pitch p1 that described central core is (1) is 5.0 ± 0.25mm, intermediate layer lay pitch p2 (2) is 10.0 ± 0.50mm, and outer layer lay pitch p3 (3) is 16.0 ± 0.80mm.