摘要:
The disclosure concerns a tread band made of rubber-like material for a tire, said tread band including two sides with a predetermined distance D between these two sides and a center. The tread band having a plurality of blocks, each block extending continuously in a curved manner to one side of the tread band towards the center of this tread band, the block following a certain curvature C. Each block includes at least one lateral face, this lateral face is covered totally by a covering material, the covering material having a modulus of elasticity which is greater than the modulus of elasticity of the rubber-like material forming the block.
摘要:
The disclosure relates to a molding element including a main lamella and two ribs positioned on either side of the main lamella at a certain distance from this main lamella. The ribs are mold-able to grooves in the tread, these ribs including rounded ends. The main lamella includes a cutting edge, the cutting edge making an acute angle. The ribs are curved in their length with a curvature C and in that the lamella is curved with the same curvature C.
摘要:
Moulding element of a mould for moulding and vulcanizing a tyre tread, this tread comprising a tread surface intended to come into contact with the ground when the said tyre is rolling, this moulding element (1) comprising a moulding surface (3) intended to mould part of the tyre tread surface and a blade (5) of length and of height H intended to mould a sipe or a groove in the tread, this blade comprising a rounded end extending along the length of the blade in a direction of extension X. The moulding element comprises two cutting means (7) positioned on either side of the blade (5) at a certain distance from this blade, and each cutting means (7) comprises a cutting edge (8)extending in the direction of extension, this cutting edge making an acute angle ± in a sectional drawing perpendicular to this direction of extension X, the distance D between this cutting edge and the moulding surface (3) being lower than the height H of the blade(5).
摘要:
The invention concerns a moulding element for moulding and vulcanizing a tyre tread, that tread comprising a plurality of raised elements, each raised element including a contact surface designed to come into contact with a roadway and side surfaces connected to that contact surface. The moulding element includes cutting blades (13) capable of cutting a covering layer (21) previously placed on a raw preform of the tyre (23). Each cutting blade includes a body (15), at least one of the cutting blades (13) includes a protuberance (19) protruding from that body (15), said protuberance being capable of driving a cut part of the covering layer into the depth of the raw preform to cover all or part of a side surface of a raised element. At one end of the body (15), the cutting blade includes an edge (17) forming an acute angle α for cutting the covering layer (21).
摘要:
Moulding element of a mould for moulding and vulcanizing a tyre tread, this tread comprising a tread surface intended to come into contact with the ground when the said tyre is rolling. The moulding element (1) comprising a moulding surface (3) intended to mould part of the tyre tread surface and a blade (5) of height H intended to mould a sipe or a groove in the tread, this blade extending in a first direction of extension Y. The moulding element comprises two cutting means (7) positioned on either side of the blade (5) at a certain distance from this blade. The moulding element comprises a third cutting means (11) of height He extending in a second direction of extension X, this second direction of extension X making an angle a with the first direction Y which is comprised between 75° and 105°. The height He of the third cutting means (11) is greater than the height H of the blade (5).
摘要:
The invention relates to a moulding element (1) of a mould for moulding and vulcanizing a tyre tread. This moulding element (1) comprises a moulding surface (3) intended to mould part of the tread surface of the tyre, and a complex blade (6, 8) projecting from the moulding surface (6), this complex blade comprising a body (6) directed mainly in a circumferential direction X and at least one secondary branch (8) of U-shape facing toward this body, the secondary branch (8) being oriented mainly in an oblique direction J, this oblique direction J making a non-zero angle ψ with a transverse direction Y perpendicular to the circumferential direction X, the secondary branch (8) being in contact with the main body at two contact zones (10, 12) to delimit a cavity (7) of length L, characterized in that the moulding element comprises a main cutting means (9) projecting from the moulding surface (3), this main cutting means extending between two of its ends (14, 16) parallel to the oblique direction J, the length of this cutting means being shorter than the length L of the cavity, and in that the moulding element (1) comprises at least two secondary cutting means (13) of height HS extending from one of the ends (14) of the main cutting means (9) as far as a respective one of the contact zones (10, 12) facing this end, each secondary cutting means (13) making an angle θ with this body (6).
摘要:
In order to maintain satisfactory performance on ice while improving performance on snow, in a tread for a pneumatic tyre in which a reinforcing layer 6 is provided on a side wall portion 5a of a ground-contacting element 5 of a tread 1 of a tyre, and in a pneumatic tyre having such a tread, the reinforcing layer has a mean thickness of less than 0.5 mm, is provided over an area at least equal to 50% of the side wall portion, and has a material modulus at least equal to 200 MPa.
摘要:
The invention relates to a tread made of a rubber material for a tire for winter driving. Said tread includes a plurality of blocks (3) having a height H, each block comprising a contact surface (7) which is to contact the ground when the tire is rolling, and at least one side surface (5a, 5b), said side surface being covered with a layer (10) of a covering material over at least 50% of the surface thereof. The block comprises a leading area for firstly contacting the ground while the tire is rolling, and said block (3) has a direction (J) of oblique extension such that the leading area of said block is a leading corner (9). The block (3) further comprises a portion (11) that is not covered by the covering material, said covering material having an elastic modulus that is greater than the elastic modulus of the rubber material constituting the block, said uncovered portion (11) extending from the leading corner over at least a third of the height H of the block.
摘要:
Tread band made of rubber-like material for a tyre. The tread band comprises a plurality of blocks (3), each block (3) having a contact face (5) designed to come into contact with the ground when the tyre travels and a plurality of lateral faces (7). Each block (3) comprises a main sipe (9) extending along a main direction. Each block (3) comprises a plurality of secondary sipes (13) perpendicular to the main sipe (9). Each lateral face (7) of the block (3) is covered by a layer (15) of covering material over at least 50% of the surface of this lateral face (7). The covering material has a modulus of elasticity which is greater than the modulus of elasticity of the rubber-like material forming the block (3). The main sipe (9) and/or each secondary sipe (13) has/have an expanded portion (17) in the depth of the block (3).