A mechanism releases a plate from a recess in a tire mold part. The mechanism includes a bolt insertable into a hole in the tire mold part and extending from a first end at an outer surface of the tire mold part to a second end at a recess for a pocket plate in the tire mold part. The first end of the bolt has an axially extending projection allowing manipulation of the bolt about an axis within the hole. The projection is defined by two diametrically opposite curved surfaces interconnected by two diametrically opposite planar surfaces.

A bead member manufacturing method for manufacturing a bead member by forming an annular bead filler in an outer peripheral side of an annular bead core includes a step of arranging the bead core on a forming surface of a forming table, a step of forming a first bead filler portion by winding a first rubber in an area closer to an outer side in a width direction than a side surface which does not face toward the forming surface in the outer peripheral surface of the arranged bead core, a step of turning over and rearranging the bead core and the first bead filler portion on the forming surface, and a step of forming a second bead filler portion by winding a second rubber in the outer peripheral sides of the bead core and the first bead filler portion so as to form the bead filler.

The invention relates to a pneumatic vehicle tyre with a sound-absorbing inner absorber (9) adhesively attached in its interior to the inner surface (7) opposite from the tread (1), wherein the inner absorber (9) adheres to an automatically sealing sealant (8), which at least immediately after being applied has the tackiness required for the adhesive attachment. In order not to influence the flow properties of the sealant disadvantageously and in order to ensure a reliable sealing effect of the sealant, a separating layer (10) is arranged between the sealant (8) and the inner absorber (9) and the separating layer (10) is made in such a way as to ensure a sufficient flowability of the sealant (8) for the sealing and a reliable adhesive attachment of the foam ring (9).

A method of manufacturing a pneumatic tire provided with a magnetic portion containing powder particles of hard magnetic material in the tread portion which comprises a drilling step of drilling a hole in an unvulcanized tread portion forming member; a magnetic piece embedding step of embedding a magnetic piece containing the powder particles of hard magnetic material in the hole as the magnetic portion; a green tire molding step of molding a green tire using the tread portion forming member in which the magnetic piece is embedded; and a vulcanizing step of vulcanizing the green tire, and this method makes it possible to finish the tire in a designed shape without causing occurrence of abnormal unevenness on the surface, even when a magnetic piece for detecting a worn state of the tire is embedded.

The inner wall of a pneumatic tyre, in the vulcanized state, is provided with a layer of polyurethane foam, characterized in that the polyurethane is based on a diphenylmethane diisocyanate (MDI), in particular 4,4-diphenylmethane diisocyanate, and on a polyol having an ethylene oxide content of greater than 50% (% by weight). This specific polyurethane formulation makes it possible to obtain a light foam that efficiently absorbs noise; it has the advantages of being simple and inexpensive and of being easy to process by direct casting of the reactants in the pneumatic tyre of the invention.

Process and an apparatus for applying noise-reducing elements to a tyre for vehicle wheels that has a radially inner surface with a service area and having a circumferential dimension. The process determines the position in circumferential direction of the service area on the radially inner surface of the tyre, determines the position in circumferential direction of a target area on the radially inner surface of the tyre based on the position in circumferential direction of the service area, and applies a noise-reducing element at the target area. The position in circumferential direction of the service area is determined by circumferentially inspecting the radially inner surface of the tyre starting from a reference position, detecting the angular position of the service area with respect to the reference position and determining the position in circumferential direction of the service area based on the angular position and on the circumferential dimension of the radially inner surface of the tyre.

A vehicle tire includes a selectively actuated stud deployment system for increased traction. The studs are contained in cells in the surface of the tire and forced to deploy by pneumatic or fluid pressure. When the pressure is released, the studs retract.

A method of preparing a tire with self-sealing properties, the method including the steps of providing a cured tire, the tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an optional innerliner layer disposed interior to the carcass layer; directly or indirectly applying a sealant composition to at least a portion of the carcass layer or to at least a portion of the optional innerliner; and directly applying an air barrier composition to at least a portion of the carcass layer or to at least a portion of the optional innerliner.

A pneumatic tire that is vulcanized using a bladder provided with a coating layer comprising a release agent, the noise absorber being fixed to the inner surface of the tread portion along the tire circumferential direction via the adhesive layer, and the amount of silicon in the release agent detected by X-ray fluorescence analysis is 0.1 wt. % to 10.0 wt. % at least in the fixation region for the noise absorber.

The present technology provides a tire manufacturing method comprising: positioning a cutting edge cradle on an elastomer layer side of the sheet laminate; pressing a circular blade, which dependently rotates from the sheet side of the sheet laminate comprising a thermoplastic resin or a thermoplastic resin composition, against the sheet laminate placed on the cutting edge cradle so as to cut the sheet laminate; and forming end sections of the sheet laminates to be superimposed.