A tire mold for processing a green tire includes a movable block, an upper sidewall plate, and a lower sidewall plate. A curved surface corresponding to the green tire is provided at a junction of the movable block and the upper sidewall plate/the lower sidewall plate. The movable block, the upper sidewall plate and the lower sidewall plate cooperate with each other to surround a tire cavity for accommodating the green tire. Thereby, the edge of the upper sidewall plate or the lower sidewall plate won't penetrate the green tire to form a joint fin when the mold is closed, which is beneficial to save the rubber material, improves production efficiency and reduces manufacturing costs.

A tire vulcanizing method comprises: a step of causing a connecting body, at which an upper mold of a vulcanization mold is supported and that connects together upper end portions of upper tubes of a plurality of supporting pillars, the supporting pillars being disposed so as to be apart in a peripheral direction at a periphery of the vulcanization mold, which is formed from a lower mold and the upper mold, which is set above the lower mold, and the supporting pillars having lower tubes that are hollow and the upper tubes, which are hollow and are slidably engaged with the lower tubes, and the supporting pillars extending in a vertical direction, to, together with the upper tubes and the upper mold, approach the lower mold, and close the vulcanization mold; and a step of vulcanizing an unvulcanized tire that is accommodated at an interior of the vulcanization mold that is closed, wherein the causing the connecting body, the upper tubes and the upper mold to approach the lower mold is carried out by operating raising/lowering mechanisms that are accommodated at interiors of the supporting pillars.

In a tire vulcanization device,a vertical position of a container ring is locked at a closed position by a lock mechanism. A pressurizing mechanism is operated so as to decrease a vertical gap between an upper plate and a lower plate. The lower plate is moved upward so that a segment is moved toward a center mechanism by a container ring and sector molds are assembled in an annular shape. A state where a predetermined vertical gap is formed between the container ring and a bolster plate by a vertical connection mechanism is created. An upper side mold disposed on a lower surface of the upper plate is closed by being pressed against an upper surface of each of the sector molds while maintaining a state where the sector molds are assembled in an annular shape.

A tire vulcanization mold disclosed herein includes sectors 13 divided in a tire circumferential direction and molding a tread portion 1 of a tire, and a pair of upper and lower side plates 11 and 12 molding a sidewall portion 2 of the tire. Mold parting lines 16a and 17a formed by the sectors 13 and a pair of the upper and lower side plates 11 and 12 are located in the tread portion 1 and a distance from a tire equator CL to the mold parting lines 16a and 17a changes periodically in the tire circumferential direction.

A tire vulcanizer is disclosed that has superior durability and in which mold parting surfaces defined by a sector and side plates are less likely to be worn even after repeated use. The tire vulcanizer includes: the sector that shapes a tread of a tire; paired upper and lower side plates that shape sidewalls of the tire; a segment that is fixed to the sector and causes the sector to move in a tire radial direction; paired upper and lower attachment plates that are respectively fixed to the paired upper and lower side plates; and the mold parting surfaces defined by the sector and the side plates. Mold inner ends of the mold parting surfaces are arranged on the tread, and the mold parting surfaces extend outward in the tire radial direction from the mold inner ends.

A pneumatic tire is provided in the tread portion with a land portion including a conductive portion made of a conductive rubber. The conductive portion has a radially inner end electrically connected to a conductive tire internal structural to be connected to a wheel rim, and a radially outer end exposed in a ground contacting top surface of the land portion. The conductive portion extends from its radially inner end to outer end while inclining toward a first side surface of the land portion. The first side surface comprises a radially inner part, and a radially outer part extending radially outwardly from the radially inner part while inclining to the radially outer end of the conductive portion at an angle greater than the radially inner part.

Method for additive manufacturing of at least one component comprises the manufacture, by depositing and selective melting of layers of powder, of at least one intermediate assembly comprising the component produced at an inclined angle and forming an angle of between 20° and 70° with a manufacturing support plate, a support interposed between the support plate and a lower base of the component, and at least one local supporting element resting against the rear frontal face of the component. During the selective-melting phases of the manufacturing step, incipient cracks are formed in regions of connection of the support and of the supporting element to the component. The component is separated from the support and the local supporting element after the manufacturing step by breaking of the connecting regions.

A set of moulding elements, designed to be inserted into a mould for moulding a tyre, comprises: at least one first moulding element (1) and one second moulding element, each moulding element extending in a main moulding-element direction (EM) between two ends (3) of the moulding element with one of the ends (3) of the first moulding element connecting to one of the ends (3) of the second moulding element along an axis (MA), which is substantially perpendicular to the main moulding-element axis (EM).

A moulding element (1) intended to be assembled in a mould for a tyre, said moulding element (1) comprising a moulding surface (2), and an external surface (3), venting means (4) designed for venting a flow of air from the moulding surface (2) towards the external surface (3), said venting means (4) comprising a first part (5) opening onto the moulding surface (2) and a second part (6) in communication with the first part (5) and opening onto the external surface (3), the first part (5) forming a path that is closed on itself, is produced by a method comprising the following steps: a step of creating the second part (6) in the moulding element; and a step of creating the first part (5) in the moulding element using a laser.

A set (1) of moulding elements intended to be added to a mould comprise a main moulding element (10) and a secondary moulding element (20) comprising an edge (21), said main moulding element (10) comprising a contact zone (11) adapted to be in contact with all or part of the edge (21) of the secondary element, said contact zone (11) not being flat, and the edge (21) of said secondary moulding element (20) comprising at least one recessed portion (22) complementary to the non-flat contact zone (11) of the main element.