CN206941287U - A kind of 28 strands of all-steel cords of (3+9+15+1) structure - Google Patents

Abstract

The utility model proposes a kind of 28 strands of all-steel cords of (3+9+15+1) structure, and it includes nine steel wires of first layer and the core strand twisted with the fingers and formed is compiled around middle three cored wire steel wires, and cored wire steel wire is identical with the twist direction of first layer steel wire, is that S is twisted with the fingers；15 steel wires of the second layer carry out volume sth. made by twisting around core strand, and second layer steel wire twist direction is twisted with the fingers for Z；Outermost layer to twine silk outside, for S twist with the fingers by the twist direction for twining silk outside, and it is circular all-steel cord to compile Formation cross-section after twisting with the fingers.Described all-steel cord, compiled and twisted with the fingers using extra-high strength wire, the intensity of tire can be improved；Steel wire diameter is small, and bend loading, pliability and the fatigue performance of cord also accordingly improve；Cored wire steel wire and first layer steel wire diameter are thicker than second layer steel wire diameter, are advantageous to the infiltration of rubber, improve the bond properties of cord.This structure in the case where ensureing tire intensity, can reduce the thickness of cord, and manufactured tire weight is light, and heat is low, and oil consumption is few, save the resources of production and production cost.

Description

A kind of 28 strands of all-steel cords of (3+9+15+1) structure

Technical field

Tire all-steel cord technical field is the utility model is related to, it is more particularly to a kind of to be applied to tubeless all steel load 28 strands of all-steel cords of one kind (3+9+15+1) structure in radial.

Background technology

With flourishing for Domestic Automotive Industry, China market continues to increase for the demand of automobile tire, uses As the new technology of tyre industry, increasing field is applied the radial tyre of steel cord skeleton.For this wheel The steel cord of tire, is not only required to improve the intensity, fatigue performance etc. of tire, it is also necessary to reduces as far as possible made of steel cord The thickness of cord, it can so make the weight saving of tire, heat is few, and oil consumption is few, to save the resources of production and production cost, because This, the development of steel cord is carried out using steel wire such as the extra-high strength wire even steel wire of very high strength of higher intensity just to be turned into One important directions of steel cord development.

Utility model content

For the use demand of current tubeless OTR tire, the purpose of this utility model is to provide one 28 strands of tire all-steel cords of kind of (3+9+15+1) structure, the bend loading of cord, pliability and fatigue performance are superior, and And tire weight is light, heat is low.

To reach the purpose of this utility model, 28 strands of all-steel cord bags of one kind (3+9+15+1) structure of the present utility model Include the twist direction that nine steel wires of first layer compile the core strand twisted with the fingers and formed, cored wire steel wire and first layer steel wire around middle three cored wire steel wires It is identical, it is that S is twisted with the fingers；15 steel wires of the second layer carry out volume sth. made by twisting around core strand, and second layer steel wire twist direction is twisted with the fingers for Z；Outermost layer is outer Silk is twined, the twist direction for twining silk outside is twisted with the fingers for S, and it is circular all-steel cord to compile Formation cross-section after twisting with the fingers；Described cored wire steel wire and first layer Gauge of wire is 0.20mm, and second layer gauge of wire is 0.155mm, twines a diameter of 0.13mm of silk outside；The cored wire steel It is 4.7mm that silk, which compiles the lay pitch twisted with the fingers, and it is 9.6mm that first layer steel wire, which compiles the lay pitch twisted with the fingers, and it is 14.0mm that second layer steel wire, which compiles the lay pitch twisted with the fingers, The outer lay pitch for twining silk volume sth. made by twisting is 3.2mm.

The beneficial effects of the utility model are 28 strands of all-steel cords of described (3+9+15+1) structure, strong using superelevation Spend steel wire and compile sth. made by twisting, the intensity of tire can be improved；Steel wire diameter is small, bend loading, pliability and the fatigue performance of cord also phase It should improve；Cored wire steel wire and first layer steel wire diameter are thicker than second layer steel wire diameter, are advantageous to the infiltration of rubber, improve cord Bond properties.This structure in the case where ensureing tire intensity, can reduce the thickness of cord, and manufactured tire weight is light, raw Heat is low, and oil consumption is few, saves the resources of production and production cost.

Brief description of the drawings

By detailed description below in conjunction with the accompanying drawings, the foregoing and other objects, features and advantages of the utility model will Become apparent.Wherein：

Fig. 1 show a kind of structural representation of 28 strands of tire all-steel cords of (3+9+15+1) structure of the present utility model Figure；

Fig. 2 show the lay pitch schematic diagram of Fig. 1 all-steel cord.

Embodiment

According to Fig. 1,28 strands of tire all-steel cords of one kind (3+9+15+1) structure of the present utility model, including the The core strand that one layer of nine steel wire 20 are formed around middle three cored wire steel wires 10 volume sth. made by twisting, cored wire steel wire 10 and first layer steel wire 20 Twist direction is identical, is that S is twisted with the fingers；15 steel wires 30 of the second layer carry out volume sth. made by twisting around core strand, and second layer steel wire twist direction is twisted with the fingers for Z；Outermost Layer twines silk 40 outside being tied to, and the twist direction for twining silk outside is that S is twisted with the fingers, and it is the all-steel cord of circle to compile Formation cross-section after twisting with the fingers.In the utility model Embodiment in, cored wire steel wire 10, first layer steel wire 20 and second layer steel wire 30 use according to newest《Radial is used Steel cord》Extra-high strength wire as defined in national standard (GB/T_11181-2016), than the steel wire of the regular tenacity of same diameter Intensity improves 20% or so.In the case where ensureing the intensity of steel cord and meeting the requirement of lighting of final tire, In preferred embodiment of the present utility model, cored wire steel wire 10, a diameter of 0.20mm of first layer steel wire 20, second layer steel wire 30 A diameter of 0.155mm, twine 40 a diameter of 0.13mm of silk outside.

When steel cord carries out twisting, due to having used the unimach silk cord of small diameter, therefore, during twisting The lay pitch, the twist direction of different layers steel cord etc. is required for being redesigned accordingly.The lay pitch is big, and productivity ratio is high, but fatigue durability It can decline, this is due to when the lay pitch is bigger, and the torsional deflection degree of cord monofilament in twisting is with regard to smaller, its elastic restoring force It is larger, it if this elastic restoring force cannot eliminate, can decline the fatigue performance of cord, service life shortens；The lay pitch Small, the fatigue performance of steel cord improves, and elongation is high, but the spinning loss of intensity is big, and productivity ratio also reduces.So according to not It is the importance in steel cord R＆D process to carry out rational lay pitch design with the all-steel cord of intensity and different steel wire diameters Can parameter.In addition, arrangement of the steel cord in twisting is the cross sectional shape of internal layer cord and outer layer cord for its strike-through Performance has important influence, and important Consideration.Therefore, in a preferred embodiment of the present utility model In, it is 4.7mm that cored wire steel wire 10, which compiles the lay pitch twisted with the fingers, and it is 9.6mm that first layer steel wire 20, which compiles the lay pitch twisted with the fingers, and second layer steel wire compiles what is twisted with the fingers The lay pitch is 14.0mm, and it is 3.2mm to twine silk outside and compile the lay pitch twisted with the fingers.

Cored wire steel wire and first layer gauge of wire of the present utility model are thicker than second layer steel wire diameter, are advantageous to rubber Infiltration, improve the bond properties of cord.Twined outside described 27 extra-high strength wires of all-steel cord and one silk compile twist with the fingers and Into the intensity of tire can be improved；Steel wire diameter is small, and bend loading, pliability and the fatigue performance of cord also accordingly improve.This Structure in the case where ensureing tire intensity, can reduce the thickness of cord.Manufactured tire weight is light, and heat is low, and oil consumption is few, Save the resources of production and production cost.

28 bursts of steel cords of (3+9 × 0.20+15 × 0.155+0.13) of the present embodiment and existing 7 × 7 × 0.22+ 0.15 steel cord comparing result is as follows：

Project	3+9×0.20+15×0.155ST+0.13	7×7×0.22+0.15HT
			Cord diameter (± 5%)/mm	1.240	2.240
Twist direction	S/S/Z/S	S/Z/S
			The lay pitch (± 5%)/mm	4.7/9.6/14.0/3.2	12.5/20.0/5.0
Minimum Fracture Force/N	2420	5120
			Line density (± 5%)/g/m	6.100	15.200
Fracture Force/line density N/ (g/m)	397	337

As can be seen from the table, compared with (7 × 7 × 0.22+0.15HT) all-steel cord, (3+9 × 0.20 of the present utility model + 15 × 0.155ST+0.13) steel cord line density it is smaller, Fracture Force/line density ratio is higher, is advantageous to improve tire Bearing capacity and security performance, its compact structure has good strike-through performance, and is significantly reduced cord quality, reduces into This.

Steel cord of the present utility model is using the small extra-high strength wire of diameter, with reference to setting for the special lay pitch, twist direction etc. Meter, makes bend loading, pliability and the fatigue performance of cord also accordingly improve；Twist direction is identical between steel wire, is linear contact lay, connects Contacting surface product is big, and contact is small, can effectively reduce the abrasion between steel wire.This structure can ensure the feelings of carcass intensity Under condition, the thickness of cord is reduced, manufactured tire weight is light, and heat is low, and oil consumption is few, saves the resources of production and production cost.

The utility model is not limited to described embodiment, those skilled in the art do not depart from it is of the present utility model In the i.e. open scope of spirit, it can still make some amendments or change, therefore rights protection scope of the present utility model is with claims The scope of restriction is defined.

Claims (1)

1. a kind of 28 strands of all-steel cords of (3+9+15+1) structure, it is characterised in that described all-steel cord uses superhigh intensity Steel wire carry out volume sth. made by twisting, it includes nine steel wires of first layer and the core strand twisted with the fingers and formed, cored wire steel is compiled around middle three cored wire steel wires Silk is identical with the twist direction of first layer steel wire, is that S is twisted with the fingers；15 steel wires of the second layer carry out volume sth. made by twisting, second layer steel wire around core strand Twist direction is twisted with the fingers for Z；Outermost layer to twine silk outside, for S twist with the fingers by the twist direction for twining silk outside, and it is circular all-steel cord to compile Formation cross-section after twisting with the fingers；Institute The cored wire steel wire stated and first layer gauge of wire are 0.20mm, and second layer gauge of wire is 0.155mm, twines the diameter of silk outside For 0.13mm；It is 4.7mm that the cored wire steel wire, which compiles the lay pitch twisted with the fingers, and the lay pitch that first layer steel wire compiles sth. made by twisting is 9.6mm, second layer steel wire It is 14.0mm to compile the lay pitch twisted with the fingers, and it is 3.2mm to twine silk outside and compile the lay pitch twisted with the fingers.