CN207130527U - A kind of 25 bursts of steel cords - Google Patents

Abstract

The utility model discloses a kind of 25 bursts of steel cords, including four layer line stocks, wherein, first layer cored wire stock is triangularly arranged by three steel wires；Second layer strands have eight steel wire encircling first layer cored wire stock arrangements, and a window is vacated between second layer strands and cored wire stock；Third layer strands are compiled around second layer strands by 13 steel wires and are twisted type, and the 4th layer of outer winding layer is entwined by a steel wire outside third layer strands；First layer to the 4th layer of twist direction is respectively that S/S/Z/S is twisted with the fingers, and the lay pitch is respectively 10/10/16/3.5mm.25 bursts of steel cords provided by the utility model, first layer cored wire stock is identical with second layer strands twist direction, the lay pitch, while the window design between second layer strands and first layer cored wire stock, can increase the permeability of rubber, improves the bonding force and Fracture Force of steel wire；In the case where ensureing tire intensity, cord thickness is reduced, manufactured tire weight is light, improves the service life of tire, saves the resources of production and cost.

Description

A kind of 25 bursts of steel cords

Technical field

A kind of 25 bursts of steel cords are the utility model is related to, belong to steel cord technical field.

Background technology

With flourishing for Domestic Automotive Industry, market continues to increase for the demand of automobile tire, uses steel curtain As the new technology of tyre industry, increasing field is applied the radial tyre of line skeleton.For the market demand, The performances such as the bend loading of steel cord, pliability, endurance should be improved constantly.

Utility model content

Purpose：In order to overcome the deficiencies in the prior art, the utility model provides a kind of 25 bursts of steel cords.

Technical scheme：In order to solve the above technical problems, the technical solution adopted in the utility model is：

A kind of 25 bursts of steel cords, including four layer line stocks, wherein, first layer cored wire stock is arranged by three steel wires in equilateral triangle Row；Second layer strands are arranged by eight steel wire encircling first layer cored wire stocks；Third layer strands surround the second layer by 13 steel wires Strands are compiled and are twisted type；4th layer of outer winding layer, is entwined by a steel wire outside third layer strands；

The second layer strands not exclusively coat first layer cored wire stock, eight steel wires and the first layer cored wire of second layer strands A window is vacated between three steel wires of stock.

Further, the second layer strands are identical with first layer cored wire stock twist direction, and have the identical lay pitch.

Further, the first layer cored wire stock and the twist direction of second layer strands are twisted with the fingers for S, lay pitch 10mm.

Further, the twist direction of the third layer strands is twisted with the fingers for Z, and the twist direction of the 4th layer of outer winding layer is twisted with the fingers for S.

Further, the lay pitch of the third layer strands is 16mm, and the lay pitch of the 4th layer of outer winding layer is 3.5mm.

Further, the first layer cored wire stock, second layer strands, the steel wire diameter of third layer strands are 0.185mm, the The steel wire diameter of four layers of outer winding layer is 0.15mm.

Further, a diameter of 1.36mm of the steel cord.

Beneficial effect：A kind of 25 bursts of steel cords provided by the utility model, using high-tensile steel wires compile twist with the fingers, steel cord it is curved Bent load, pliability and fatigue performance also accordingly improve；First layer cored wire stock is identical with second layer strands twist direction, the lay pitch, and And breach be present between second layer strands and first layer cored wire stock, the permeability of rubber can be increased, improve steel wire bonding force and Fracture Force；This steel cord structure can reduce cord thickness, manufactured tire weight is light, carries in the case where ensureing tire intensity The service life of high tire, save the resources of production and cost.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Embodiment

The utility model is further described below in conjunction with the accompanying drawings.

As shown in figure 1, a kind of 25 bursts of steel cords, including four layer line stocks, wherein first layer cored wire stock 1 have three steel wires in just Rounded projections arranged, second layer strands 2 have eight steel wire encircling first layer cored wire stocks 1 to arrange；To cladding first layer cored wire completely Three steel wires of stock need nine steel wires, and second layer strands of the present utility model are using eight steel wires, therefore the second layer A window is vacated between strands 2 and first layer cored wire stock 1.Third layer strands 3 have 13 steel wires to be compiled around second layer strands 2 Type is twisted, the 4th layer of outer winding layer 4, is entwined by a steel wire outside third layer strands 3.Due to second layer strands 2 and first Window design between layer cored wire stock 1, rubber can by 13 steel wires of third layer strands 3 directly with first layer cored wire stock 1 Contact, the binding efficiency of first layer cored wire 1 three steel wires of stock reaches 89% as second layer strands 2, improves bonding force and attached Glue rate.

Three steel wires of first layer cored wire stock 1 are identical with eight wire pitches, twist directions of second layer strands 2, specifically, twist with the fingers Away from for 10mm, twist direction is that S is twisted with the fingers.

The twist direction of third layer strands 3 is twisted with the fingers for Z, lay pitch 16mm；The twist direction of 4th layer of outer winding layer 4 is twisted with the fingers for S, and the lay pitch is 3.5mm。

First layer cored wire stock 1, second layer strands 2, the steel wire diameter of third layer strands 3 are 0.185mm, the 4th layer of outer winding layer 4 steel wire diameter is 0.15mm；A diameter of 1.36mm of whole steel cord.

The performance comparison of several different model steel cords of table 1

As can be seen from Table 1,3/8+13 × 0.185+0.15HT steel cords compare 3+9+15 × 0.175+0.15NT steel curtains Line, line density is smaller, and Fracture Force is larger, and Fracture Force/line density ratio is larger；3/8+13 × 0.185+0.15HT steel cords are compared 3+8+13 × 0.18+0.15HT steel cords, line density is larger, and Fracture Force is higher, and Fracture Force/line density ratio is bigger；Larger Fracture Force/line density ratio is advantageous to improve the bearing capacity and security performance of tire, and 3/8+13 × 0.185+0.15HT The compact structure of steel cord has good strike-through performance, is significantly reduced cord quality, reduces cost.Due to 3/8+13 × The 0.185+0.15HT cored wire stocks lay pitch is all bigger (10mm ＞ 5mm) compared to the cored wire stock lay pitch of other two kinds of steel cords, so 3/8 The fatigue performance of+13 × 0.185+0.15HT steel cords is more preferable.

Described above is only preferred embodiment of the present utility model, it should be pointed out that：For the common skill of the art For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and Retouching also should be regarded as the scope of protection of the utility model.

Claims (7)

1. a kind of 25 bursts of steel cords, including four layer line stocks, it is characterised in that：First layer cored wire stock, it is in positive triangle by three steel wires Shape arranges；Second layer strands are arranged by eight steel wire encircling first layer cored wire stocks；Third layer strands are by 13 steel wires around the Two layer line stocks are compiled and are twisted type；4th layer of outer winding layer, is entwined by a steel wire outside third layer strands；

The second layer strands not exclusively coat first layer cored wire stock, eight steel wires and the first layer cored wire stock of second layer strands A window is vacated between three steel wires.

2. 25 bursts of steel cords according to claim 1, it is characterised in that：The second layer strands are twisted with the fingers with first layer cored wire stock To identical, and there is the identical lay pitch.

3. 25 bursts of steel cords according to claim 2, it is characterised in that：The first layer cored wire stock and second layer strands Twist direction is twisted with the fingers for S, lay pitch 10mm.

4. 25 bursts of steel cords according to claim 1, it is characterised in that：The twist direction of the third layer strands is twisted with the fingers for Z, and the 4th The twist direction of the outer winding layer of layer is twisted with the fingers for S.

5. 25 bursts of steel cords according to claim 1, it is characterised in that：The lay pitch of the third layer strands is 16mm, the The lay pitch of four layers of outer winding layer is 3.5mm.

6. 25 bursts of steel cords according to claim 1, it is characterised in that：The first layer cored wire stock, second layer strands, The steel wire diameter of three layer line stocks is 0.185mm, and the steel wire diameter of the 4th layer of outer winding layer is 0.15mm.

7. 25 bursts of steel cords according to claim 1, it is characterised in that：A diameter of 1.36mm of the steel cord.