摘要:
A tire having aggressive tread features with improvements in uniformity that can also improve endurance is provided along with a method and apparatus for manufacturing such a tire. The tire and its manner of manufacture can achieve a reduction or elimination of certain non-uniformities that can occur during the molding of large tread blocks. The reduction or removal of these non-uniformities can improve temperature performance to provide increased tire endurance. The present invention further relates to a tire made using such a method and that may have layers of different material properties for different tire performances. In one embodiment, a layering technique that creates tread blocks or lugs in close proximity to each other and that can run continuously is provided.
摘要:
A method of forming a tire component comprising a first rubber compound and a second rubber compound is disclosed. The method comprises the steps of: (i) extruding a first rubber compound through a main extruder (20) and a main gear pump (25); (ii) extruding a second rubber compound through a second extruder (40) and a second gear pump (42) into the main extruder (20); (iii) varying or tuning the ratio of the first compound to the second compound by adjusting the speed of the main gear pump (25) and/or the speed of the second gear pump (42) to obtain a first blend ratio of the first compound to the second compound and then applying a first rubber profile directly onto a tire building machine (95) to form a first zone of rubber having the first blend ratio; and (iv) adjusting the speed of the main gear pump (25) and/or the second gear pump (42) to obtain a second blend ratio of the first compound to the second compound, and then applying a second rubber profile formed of the first compound and the second compound to form a second zone of rubber having the second blend ratio. Also, a pneumatic tire comprising a tire component with two or more adjacent zones of different mixtures of rubber is disclosed. The transition in terms of rubber composition from one of said zones to an adjacent zone is continuous.
摘要:
A pneumatic radial tire (1) comprising a tire carcass is disclosed. The tire (1) comprises a tread portion comprising a tread (3) disposed on the tire carcass; a pair of sidewall portions (4) adjacent to the tread portion;=a carcass ply (5, PC) extending circumferentially about the tire (1) and exhibiting two ply ending portions (20), wherein each ply ending portion (20) comprises a first ply contact section (21, Si) adjacent to a ply turn-up section (22, ST), said ply turn-up section (22, ST) being adjacent to a second ply contact section (23, S2), said second ply contact section (23, S2) forming or including the end of the ply ending portion (20); and a pair of bead portions adjacent to the sidewall portions (4). Each bead portion comprises a bead core (7), one or more apex elements (6) and one of the two ply ending portions (20) of said carcass ply (5, PC). In each bead portion, the ply ending portion (20) comprised therein forms a sealed enclosure (30) containing the bead core (7), said sealed enclosure (30) exhibiting a ply-to-ply contact section (11, Sc) formed by the first ply contact section (21, Si) and the second ply contact section (22, S2), and further exhibiting a surrounding section formed by the ply turn-up section (22, ST). In each bead portion, at least one apex element (6, EA) of the one or more apex elements (6) is located axially outwards from the ply-to-ply contact section (11, Sc) and at least a portion of the axially inward surface of said at least one apex element (6, EA) is in direct contact with an axially outward surface of the ply-to-ply contact section (11, Sc).
摘要:
A non-pneumatic tire for a vehicle or other machine. The non-pneumatic tire may include an annular beam. The annular beam may include a plurality of layers of different elastomeric materials. The annular beam may be free of a substantially inextensible reinforcing layer running in a circumferential direction of the non-pneumatic tire. The annular beam may include a plurality of openings distributed in the circumferential direction of the non-pneumatic tire. Such an annular beam may be part of other annular devices.
摘要:
The invention relates to an elastomer laminate comprising three layers, the first layer consisting of a diene rubber composition comprising a first elastomer matrix; the second layer consisting of a diene rubber composition comprising a second elastomer matrix, which second elastomer matrix comprises a second ethylene terpolymer elastomer consisting of an α-olefin and an unconjugated diene and containing more than 10% by mass diene units; the third layer consisting of a diene rubber composition comprising a third diene elastomer with a diene unit mass rate greater than 50%, the second layer being disposed between the first layer and the third layer. A laminate of this type has good resistance to separation of its constituent layers.
摘要:
A pneumatic tire including: on a tread of the tire, inclined belt layer and circumferential belt layer; and on the tread surface, a plurality of circumferential grooves extending in the tread circumferential direction, and shoulder land portions partitioned between the circumferential grooves located outermost in the tire width direction and tread ground contact ends. Positions of the tread surface that correspond to the outermost ends of the circumferential belt layer in the tire width direction are within the shoulder land portions, and the distance in the tire width direction between the outermost ends in the tire width direction of the circumferential belt layer and tire equator side ends of the shoulder land portions is 12 % or more and 22 % or less of a half of the width of the circumferential belt layer in tire width direction.