B29D2030/0621

Equipment for moulding and curing a green tyre

Equipment for molding and curing a green tire includes a curing mold including a first bead molding ring including a first surface for contacting a radially inner and axially inner surface portion of an annular fixing structure of the green tyre and a first sidewall plate including a second surface for contacting a radially inner and axially outer surface portion of the annular fixing structure. The first bead molding ring is radially extendable from a contracted operating position to an expanded operating position so as to delimit a portion of the annular fixing structure between the first sidewall plate and the first bead molding ring, and the first bead molding ring is translatable towards the first sidewall plate for generating a first squeezing pressure on the annular fixing structure. The equipment further includes an inflatable bladder associated for operation with the curing mold.

Tire
10821692 · 2020-11-03 · ·

A tire is provided, which includes: a circular tire frame formed from a resin material containing an olefin resin; and an exterior member formed from a thermoplastic rubber vulcanizate which contains an ethylene-propylene-diene rubber and a polyethylene-based resin, and in which a content of the ethylene-propylene-diene rubber is from 20% by mass to 45% by mass with respect to a total mass of the thermoplastic rubber vulcanizate, and a fluidity is from 1.0 g/10 min to 60 g/10 min.

Bead ring design improvement

A bead ring for a tire mold includes a plurality of concentric rings, wherein at least two adjacent concentric rings form an interface having a circumferential seam. The circumferential seam is configured to receive airflow from an interior of the tire mold, and the circumferential seam is in fluid communication with an air chamber located radially exterior of the circumferential seam.

BEAD RING DESIGN IMPROVEMENT
20200207043 · 2020-07-02 ·

A bead ring for a tire mold includes a plurality of concentric rings, wherein at least two adjacent concentric rings form an interface having a circumferential seam. The circumferential seam is configured to receive airflow from an interior of the tire mold, and the circumferential seam is in fluid communication with an air chamber located radially exterior of the circumferential seam.

Tire vulcanizing mold, tire manufacturing method, and tire
10414109 · 2019-09-17 · ·

A tire vulcanizing mold for molding an unvulcanized tire into a pneumatic tire having a bead part with a bead heel part is provided with a side part ring for molding at least the bead part. A circumferential groove part extending in the tire circumferential direction is formed on a tire molding surface of the side part ring in a heel molding region for molding the bead heel part, the side part ring is divided into a side ring and a bead ring that abuts against the side ring, the division position of the tire molding surface of the side ring and the tire molding surface of the bead ring is located in the groove bottom of the circumferential groove part, and the cross-sectional shape of the circumferential groove part tapers toward the groove bottom.

TIRE
20180281329 · 2018-10-04 ·

A tire is provided, which includes: a circular tire frame formed from a resin material containing an olefin resin; and an exterior member formed from a thermoplastic rubber vulcanizate which contains an ethylene-propylene-diene rubber and a polyethylene-based resin, and in which a content of the ethylene-propylene-diene rubber is from 20% by mass to 45% by mass with respect to a total mass of the thermoplastic rubber vulcanizate, and a fluidity is from 1.0 g/10 min to 60 g/10 min.

METHOD OF CONTROLLING A PHASE OF MOULDING AN ANNULAR FIXING STRUCTURE AND A TYRE INCLUDING AN ANNULAR FIXING STRUCTURE

A tyre includes a toroidal ring-shaped carcass structure with at least one carcass ply associated with at least one annular fixing structure, as well as a tread band positioned radially externally with respect to the carcass structure. The annular fixing structure includes a radially inner and axially inner surface and a radially inner and axially outer surface, the surfaces being substantially opposed to each other. The radially inner and axially inner surface and radially inner and axially outer surface are shaped by successive application of a first squeezing pressure produced by a first surface and a second surface of a curing mould that are brought towards each other, as well as a second squeezing pressure produced by bringing the first and second surfaces closer together. The radially inner and axially inner surface and/or radially inner axially outer surface have a shape that includes air evacuation channels.

TIRE VULCANIZING MOLD, TIRE MANUFACTURING METHOD, AND TIRE
20170008243 · 2017-01-12 · ·

A tire vulcanizing mold for molding an unvulcanized tire into a pneumatic tire having a bead part with a bead heel part is provided with a side part ring for molding at least the bead part. A circumferential groove part extending in the tire circumferential direction is formed on a tire molding surface of the side part ring in a heel molding region for molding the bead heel part, the side part ring is divided into a side ring and a bead ring that abuts against the side ring, the division position of the tire molding surface of the side ring and the tire molding surface of the bead ring is located in the groove bottom of the circumferential groove part, and the cross-sectional shape of the circumferential groove part tapers toward the groove bottom.