bias tires (diagonal tire; bias tire) of the tire structure, also known as common, code “B”. Refers to the carcass ply and a cord intersecting layer adjacent to the buffer, and the center line of the tread of the pneumatic tire is arranged at an angle of less than 90 deg.] C. This longitudinal stiffness of the tire is good, in general adapted to speed traveling road surface. Simply called bias tire nylon tire. This concept is known as a radial tire with respect to the steel tire terms. .
1 noun interpretation bias tire
bias tires (diagonal tire; bias tire) of the tire structure, also known as common, code “B”. Refers to the carcass ply and a cord intersecting layer adjacent to the buffer, and the center line of the tread of the pneumatic tire is arranged at an angle of less than 90 deg.] C. This longitudinal stiffness of the tire is good, in general adapted to speed traveling road surface. Simply called bias tire nylon tire. This concept is known as a radial tire with respect to the steel tire terms.
2. bias tire structure
The main bias tire tread plies, the composition of the buffer layer and the bead. Common bias ply tire and a buffer layer of adjacent cords intersect, and the center line of the tread is less than 90 degree angles. Bias tire tread is submitted inserted shape, non-slip effect, since the inner layer does not change, the economic effect is not obvious.
● tread : tread outer surface of the tire casing, includes three parts crown, shoulder and sidewall.
the crown: the crown made of wear-resistant rubber, it is directly subjected to friction and full load, it can reduce the impact suffered ply. And protection ply and inner tubes, so that its mechanical damage. There are various embossing pattern on the tread, in order to ensure the adhesion performance of the tire and the ground, to prevent tire slip. Tire tread pattern has a very important impact on car performance, it is necessary to pay sufficient attention to the tire tread in the selection of tires.
the shoulder: the shoulder portion is a transition between the crown and a thicker sidewall thinner. In addition to its function as a protective ply, but also generally surface formed with various patterns to facilitate skid and heat.
Sidewall: sidewall is attached a thin layer of sidewall rubber plies, it is subjected to high distortion, their role is to protect cord plies from mechanical damage and water erosion.
● ply
ply tire skeleton is also known as the carcass. Its main role is to bear the load, to maintain the shape and size of the casing, so that the casing has a certain strength. Typically a multilayer ply of rubberized cords with rubber bonded together. In order to make the load being evenly distributed, mostly even number of plies. The more number of plies, the more strengthLarge, but the corresponding its elasticity decreases. Number of plies are generally marked on the surface of the casing.
generally ply cotton materials, artificial silk, nylon and steel wire. After now use more for steel cord and polyamide fiber, in the same case of the tire load carrying capacity of plies can be reduced, so that not only reduces the consumption of rubber, improve the quality of the tires, but also reduce the rolling resistance, extended tire life. Between the
● buffer layer
The buffer layer of the tread and the ply, generally with two or several layers of cords and sparse greater elasticity rubber made, so its greater flexibility, able to absorb the impact suffered by the car travel on the rough road, and to prevent the car from the tread and the ply during emergency braking.
● bead
by the bead wire ring, the ply wrapping and chafers, has a great stiffness and strength, the tire can strongly mounted on the rim.
3. Classification bias tire
● common bias tire
plies and the buffer layer each adjacent cords cross the center line of the pneumatic tire tread arranged at an angle, referred to as a common bias tires.
with the casing by a crown ply, the composition of the buffer layer and the bead. Ply tire skeleton is, to maintain the shape and size of the tire, usually linked to the number of pairs of the multilayer tape (fabric) bonded together by a rubber. Crossing angle ply cords of the tire meridian cross section (crown angle) General48 degrees to 55 degrees, the cords of adjacent layers intersect arrangement. The more layers of fabric, the greater the intensity, but less elastic. On the casing surface marked with number of plies, such as 16 levels, 18 levels and the like.
by a ply of longitudinal warp threads and a tough few wefts in between the warp threads woven. The cords may be cotton, artificial silk, nylon cord and wire. Rayon can use the same size of the tire to increase its load bearing capacity, because the strength of rayon and elasticity. Better off than nylon, rayon, high durability. Thus, when using rayon, nylon or steel cord, at the same tire load carrying capacity, the number of plies can be reduced at this time is marked on the casing surface is level, (corresponding to cotton ply layers, rather than the actual ply layers). China has extensive use of rayon and nylon cord, recently began using steel cord, but high prices and crisp but not widely used.
The buffer layer is located between the tread and the ply, and the film is linked with two or several layers of fabric made of a dilute glue, so that greater flexibility, can ease the uneven road when driving automobiles is subjected to shocks and prevent the car from the tread and the ply during emergency braking.
the tire tread is the outer most layer can be divided into the crown, sidewall and the shoulder of three parts, the crown made of wear-resistant rubber, it is directly subjected to friction and full load, can be reduced shock suffered plies, plies and inner tubes and to protect against mechanical damage. The tire and the ground to have good adhesion properties, preventing vertical, lateral slip, etc., in the tread has a concavo-convex pattern of various shapes.
the shoulder portion is a transition between the thinner and thicker crown sidewall, generally made of a pattern, to facilitate heat dissipation.
sidewall rubber layer is thin, the sidewall plies to protect from moisture and mechanical damage.
that the tire bead securely mounted on the rim, we have great stiffness and strength, a bead, the ply wrapping and chafer components.
● bias-belted
bias belted tires (bias belted tyre), also known as semi-radial tire refers to a belt tightening swash cross tire carcass pneumatic tire. It is a compromise between the structure of the program between the common bias tires and radial tires. Belt cords arranged with bias-belted radial tire close, sub-cords which plyObliquity afternoon section is smaller than ordinary bias tire, larger than the radial tire. Tire performance between the bias tires and radial tires, producing substantially the same bias. Thus, bias-belted life and rolling resistance of the tire is interposed between the two, but the lateral stability is better than car radial tire.
bias belted tire production only the United States in the world, as a transition to a radial tire bias tire product, with the development of radial tires, which tire will gradually be eliminated. ,
4. The bias tire characteristics
Since the arrangement of bias ply, tread and sidewall strength of the bias tire is large. When properly inflated, to ensure a suitable elastic tire, sufficient bearing capacity to meet the requirements of automobile tires. However, bias tire sidewall stiffness greater, poor comfort due to friction between the plies and the large movement at a high speed, not suitable for high speed.
In contrast, radial ply tire corresponds to the basic skeleton of the tire, which is the arrangement direction of the tire meridian cross section of the same. Due to running of the tire to bear a larger tangential force to guarantee the stability of the cord, in which there are a plurality of outer belt layer of a high strength, made of a material difficult to stretch (also known as banding layer) which meridional direction of the cord section was larger crossing angle. Thus, compared with the conventional oblique radial tire tire, elasticity, wear resistance, rolling resistance, good adhesion properties, cushioning properties, load capacity, easy piercing; but the drawback is easy to sidewall cracks, since the side to deformation, resulting in slightly inferior lateral stability automobiles, high technology manufacturing requirements and high costs.
5. Prospects bias tire
Now, in order to simplify the bias tire in the production process, would increase the effectiveness and economic, it has tended to reduce the weight of the layer. After the national limit overload of program implementation, as a large bias tire producers such as Double Happiness gradually reduce the production of high-level bias tire, truck tire low-level effect is not very optimistic, therefore, is gradually becoming too small tire meridian . Bias tire is a tire of a traditional structure, although in use for a long time, a wide range of use, production technology has also been some basis, but due to the unreasonable on its structure, affecting the development, will be gradually meridian tide replaced.