A tire tread mold which allows more flexibility in the design of tread patterns and which reduces the risks of blades being damaged during molding operations is needed. Such a mold has a tread mold portion which is divided in into a plurality of mold segments having an inner face curved along the circumferential direction according to an arc angle , each of the mold segments including laterally extending blades forming projections from their inner face; wherein the mold segments have a first end portion, a second end portion and a central portion; wherein laterally extending blades of the central portion extend in the operating direction, and wherein laterally extending blades of the end portions are inclined blades that extend in a direction forming an angle with the operating direction, wherein with angle being less than half of angle .

A method for manufacturing an aluminium mould (1) segment (10) for curing and vulcanizing a tyre comprises: a) fixing at least one thin blade (2) for the formation of the grooves in the tire tread, in a mould form made of friable material, so that an exterior part of the thin blade is embedded in the material of the mould form and so that an interior part projects from this mould form, this thin blade being made from maraging steel and having been obtained by a selective laser melting method, b) closing the mould form and pouring or injecting aluminium into it, coating the interior part of the thin blade, c) breaking away the mould form to obtain the mould segment. The thin blade (2) is subjected to a peening treatment with a material with a Vickers hardness between 340 and 500 HV and with dimensions smaller than 0.3 mm.

A sipe blade which is implanted in a base mold and which molds a sipe in a tire is provided with a first blade molded by pressing a plate member and a second blade having a thickness greater than a thickness of the first blade. The second blade is provided with a contact portion which extends along an outer periphery of the first blade implanted in the base mold and with which one molding surface of the first blade comes in contact along a peripheral edge portion of the first blade, or provided with a fitting portion which accommodates the peripheral edge portion of the first blade and with which both molding surfaces of the first blade come in contact.

A sipe blade for molding a sipe, which is provided in a tire molding mold for molding a tire, the sipe blade being formed by overlapping a plurality of members that are made of a rolled material and that are individually formed to have a constant thickness.

A mold segment (10) for forming a tire is provided that has a sipe element (14) with first and second ends. A first side face (20) is oppositely disposed from a second side face (22) in a width direction, and a bottom is oppositely disposed from a top in a height direction. The sipe element has a projection (30) that extends from the first side face. A mold segment base (32) made of a material that is more flexible than material making up the sipe element (14) is present. The mold segment base receives the sipe element such that the bottom of the sipe element is located inside of the mold segment base and the top of the sipe element is located outside of the mold segment base. The mold segment base defines a cavity (34), and the projection (30) is located inside of the cavity (34). The mold segment (10) is used for forming a production mold segment (68) that ultimately molds a green tire into a cured tire (12).

A tire molding element for vulcanization molding a tire tread is disclosed herein. The tire includes at least one thin plate including a protrusion which protrudes from the main body in the thickness direction of the thin plate and guides the cut covering layer in the depth direction of the green tire in such a way as to cover at least a portion of the transverse side surface of the ground contact element, and the at least one thin plate comprises at least two cutting means separated in the thickness direction of the at least one thin plate, at an end portion on the opposite side to the molding surface.

A composite lining element for a tire mold comprises first and second bodies 12, 14 which are able to mold, at least in part, the one same tread pattern in a tread of the tire and each delimiting an exterior molding surface 12b, 14b and an opposite interior surface 12a, 14a. The composite lining element further comprises at least a means 16 of assembling the first and second bodies. The interior surfaces 12a, 14 of the bodies are kept by the means of assembling at least locally in a separated position that creates an interior space 22.

A tire vulcanizing die comprises a tread molding surface; a sipe blade extending along the tread molding surface; and a cast projecting region extending along the tread molding surface from an end of the sipe blade; wherein width of the cast projecting region is greater than width of the sipe blade.

Venting unit for a vulcanizing mold of a pneumatic vehicle tire, having a central longitudinal mid-axis (a), a cylindrical housing, and a valve insert, which is positioned in the housing and is movable relative thereto and has a valve shank with a valve disk and has a helical compression spring, which surrounds the valve shank and is supported with its one end on the housing and with its other end on the valve disk, it being possible for the housing to be anchored in a venting bore of the vulcanizing mold by a press fit. The housing can be anchored in the venting bore by a press fit just over 30% to 45% of the housing length and at least directly at the outer end of the venting bore.

A tire includes a circumferential tread having a tread element disposed thereon, wherein the tread element includes a top surface that defines a first plane. The tire further includes at least one substantially helicoid-shaped sipe disposed in the tread element. The substantially helicoid-shaped sipe is defined by an opening in the top surface extending in a first direction in the first plane when the tire is new, and is further defined by a base extending in a second direction in a second plane parallel to the first plane. The second direction is disposed at an angle between 45 and 135 with respect to the first direction.