Tire pneumatic tires of radial construction

 

(57) Abstract:

Use: in the manufacture of tyres for vehicles. The inventive belt is made of two cross layers of rubber-coated steel cord with the ratio step between the threads to the thread diameter in the range from 1.8 to 2.5 when the thread diameter of 0.8-1,65 mm 1 Il, 1 table.

Known design tires of radial construction with a belt made of medium steel cord layer and the upper and lower viscose layers, with yarn of viscose rayon and steel cord layer have the same angles of inclination towards the opposite side, the width of each of viscose layer exceeds the width of the steel cord layer, and the ratio of the strength of the steel cord filaments to the strength of viscose filaments in the layers of the breaker is in the range from 3 to 12 [1] the prototype.

A disadvantage of known construction tires radial build is not fully realized the possibilities of improving the durability and mileage of the tire in use.

Also known construction pneumatic tires of radial construction with textile carcass and steel cord breaker containing two or more layers of steel cord in the belt [2, 3]

The disadvantage of these escriche, in particular, the sectoral break forms.

The aim of the invention is to increase the wear life of the tire in operation while retaining Assembly and vulcanization existing for the production of textile radial tires.

This goal is achieved by the fact that the tire belt is made of two cross layers of rubber-coated steel cord with the ratio step between the threads to the thread diameter in the range from 1.8 to 2.5 when the thread diameter of 0.8-1,65 mm

Used in the tread of the tires of two layers of rubber-coated steel cord with opposite directional angles of the threads can improve progestrone properties of the crown of a tire compared to a combined breaker from a layer of steel and two layers of viscose cord, and at the same time to keep the technology of Assembly and vulcanization existing for the production of textile radial tires due to the selected limits the relationship of the step between the threads to the diameter of the steel cord filaments (pitch is the distance between the centers of the filaments of the steel cord).

The increasing step between threads makes it possible to maintain the production technology of textile radial tires and positively impact the Nagas.

In addition, the proposed solution can be used in the manufacture of automobile tires steel cord filaments of increased diameter, i.e., a more economical brand of steel.

The invention is illustrated by the drawing, which shows a cross section of a pneumatic tyre radial build.

The proposed option tires includes two cross-layer rubber-coated steel cord with the thread diameter of 0.9 mm (1) with the ratio of pitch to diameter of 2, 15 and casing plies of textile cords (2).

The prototype consists of one layer of rubber-coated steel cord (3) with the thread diameter of 0.9 mm and a ratio of pitch to diameter of 1.5 and two layers of rubber-coated viscose cord 172BP (4) in the belt and layers of rubberized textile cords (5) in the frame.

The results of machine and operational tests are given in the table.

Lifetime offer of tyres in comparison with the prototype increased by 15

The sources of information.

1. Auth. St. USSR N 2013216, B 60 C 9/20, 1994.

2. [C. L. tyres. M Goskomizdat, 1963, S. 20-21, 238-239.

3. Saltykov A. C. fundamentals of modern technology tires, M. Chemistry, 1974, S. 46-47.

The pneumatic tire of rubber-steel cord, characterized in that the breaker is made of two cross layers of rubber-coated steel cord with the ratio step between the threads to the thread diameter in the range of 1.8 to 2.5 when the thread diameter of 0.8 1,65 mm

 

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The invention relates to pneumatic tires, in particular for the construction of the breaker tires of radial construction

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SUBSTANCE: invention relates to design of radial-ply tyres for trucks. Proposed tyre casing contains tread, breaker, carcass, side strips and bead rings. Diameter of metal cord is from 1.14 to 1.26 mm. Metal cord proper is made of equal-diameter metal threads, ratio of metal thread diameter to diameter of metal cord being from 0.253 to 0.298. Ratio of breaker metal cord pitch to diameter of metal cord is from 1.9 to 2.25, and linear density of metal cord lies within 5.0 and 5.5 g/m. Ratio of thickness of each rubber-lined layer of metal cord in breaker to diameter of metal cord is from 0.35 to 1.49, breaking strength of metal cord being not lower than 1715±5N.

EFFECT: reduced materials usage, labour input and energy consumption at production of tyres.

2 dwg

FIELD: automotive industry; tyre industry.

SUBSTANCE: invention relates to design of radial-ply tyres for trucks. Proposed tyre casing contains tread, breaker, carcass, side strips and bead rings. Diameter of metal cord is from 0.87 to 0.97mm. Metal cord proper is made of metal threads of equal diameter, ratio of diameter of metal thread to diameter of metal cord being from 0.242 to 0.293. Ratio of pitch of metal cord in breaker to diameter of metal cord is from 1.85 to 2.076, and linear density of metal cord lies within 2.84 and 3.16 g/m. Ratio of thickness of each rubber-lined layer of metal cord in breaker to diameter of metal cord is from 1.62 to 1.85, and breaking strength of metal cord is not lower than 955±5N.

EFFECT: reduced materials usage, labour input and power consumption at production of tyres.

2 dwg

FIELD: automotive industry; tyre industry.

SUBSTANCE: invention relates to design of radial-ply tyres for trucks. Proposed tyre casing contains tread, breaker consisting of metal cord and textile layers, carcass, side strips and bead rings. Diameter of metal cord is from 0.83 to 0.91 mm. Metal cord proper is made of metal threads of equal diameter, ratio of diameter of metal thread to diameter of metal cord being from 0.280 to 0.331. ratio of pitch of metal cord in breaker to diameter of metal cord is from 1.978 to 2.168, and linear density of metal cord lies within 2.64 and 2/96 g/m. Ratio of thickness of each rubber-lined layer of metal cord in breaker to diameter of metal cord is from 1.538 to 1.839, and breaking strength of metal cord is not lower than 855±5N.

EFFECT: reduced materials usage, labour input and power consumption at production of tyre.

2 dwg

FIELD: automotive industry.

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EFFECT: increased strength of pneumatic tire crown.

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EFFECT: increased strength of crow of pneumatic tire.

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EFFECT: increased strength of tires.

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EFFECT: perfected performances.

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EFFECT: material, labor and energy consumption of tire manufacturing is lowered.

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EFFECT: longer life.

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