A vulcanization mold is for a tire in which a plurality of sipes are arranged in a tire circumferential direction. The vulcanization mold includes a tread mold having a plurality a blades, for forming the sipes, provided on a tread forming surface. The tread mold is composed of a plurality of segments divided in the tire circumferential direction such that the segments are movable in a tire radial direction, and the number of divisions of the segments is 17 or more and 29 or less.

In a container for a tire vulcanizer including a plurality of segments respectively holding sectors arranged in a cylindrical shape, which opens and closes by moving the segments in a radial direction of the cylindrical shape, a protruding member protruding from an opposed surface between the segments adjacent to each other is provided, and a protruding amount of the protruding member from the opposed surface can be adjusted.

A tire mold comprises sector molds for forming a tread portion of a tire and mold pins provided on the sector molds for forming insertion holes in the tread portion. The insertion holes each comprise a first hole portion with a first inner diameter where a body portion of a stud pin is disposed and a second hole portion with a second inner diameter greater than the first inner diameter where a bottom flange portion of the stud pin is disposed. The mold pins each comprise a trunk portion with a first outer diameter for forming the first hole portion and a tip portion with a second outer diameter greater than the first outer diameter for forming the second hole portion.

The subject invention relates to a mold segment comprising a tread molding element for manufacturing a tire wherein the tread molding element comprises a shell and an infill, wherein the shell has a first wall with a negative tread pattern extending from its external surface for molding the tread, a second wall opposed to the first wall, and lateral walls; wherein the infill is a fluid-permeable structure defining a fluid-permeable infill; and wherein at least one of a lateral wall and the second wall comprises at least one fluid passage passing through the lateral wall or the second wall.

A tire mold having moveable elements displaceable to bring the tire mold into an open or into a closed position. The mold comprises upper and lower side members; a plurality of mold segments defining a mold cavity; a vacuum device for removing gas from the mold cavity; and sealing means with closing seal members configured to cooperate with associated cooperating surfaces for sealing the mold cavity by contact with each other. The one or more closing seal members and the associated cooperating surfaces are moveable relative to each other upon displacement of the one or more moveable elements. Said one or more closing seal members are placed in a position in which they are facing their associated cooperating surfaces without contacting them both in a partial closure position of the tire mold and in the closed position of the tire mold when the vacuum device is not activated.

A process for molding a tire within a tire mold having movable elements displaceable to bring the tire mold into an open position or a closed position. The tire mold comprises upper and lower side members; mold segments defining a mold cavity; and sealing means for sealing the mold cavity. The process comprises steps of providing a tire mold having one or more closing seal members; placing the green tire into the mold cavity; placing one or more closing seal members next to a cooperating surface so as to face it without contacting it, by bringing the tire mold into a partial closure position; and drawing a vacuum on the mold cavity causing the one or more closing seal members to be moved or deformed by suction until they are in contact with the cooperating surface so that the mold cavity is sealed in an airtight manner.

A mold for a tire comprises first and second shells that are intended to mold lateral sidewalk of the tire, a plurality of sectors that are distributed in the circumferential direction and are intended to mold a tread of said tire, a first and a second support plate that each comprise a bearing face with which the associated shell is mounted axially in contact, and a plurality of first and second heating means for heating at least the first and the second shell, respectively.

Tire vulcanizing mold able to cooperate with a curing press, said mold comprising two shells each one molding a sidewall of the tire and a ring of sectors for molding the tread of the tire, each sector comprising a support and a molding lining situated radially on the inside of the support, in which ring the sectors, when the mold is in the closed position, are all in circumferential contact one with the next via the molding linings and in radial contact on the shells via the front ends of the linings each of which forms a face for contact with the shell, said supports and linings being produced in such a way that each support is able to take up the clamping force applied to the lining coming into contact with the shell when the mold is in the closed position when said clamping force at said contact face exceeds a given threshold that is lower than the plastic threshold of the lining. A predetermined clearance (j) is provided between the lower front face of the shell and the lower front end of the support, and in that this clearance (j) is cancelled out when the mold is in the closed position.

The tire vulcanizing mould includes a plurality of segments for molding the outside of the tire tread. The segments are able to move radially between a position in which the mold is open and a position in which the mold is closed. The segments have frustoconical bearing surfaces that are placed radially on the outside. An axially mobile external ring, which acts on the frustoconical bearing surfaces, is placed radially on the outside of the segments in order to cause them to close and to move back from their position of closure in the mold. The external ring is radially preloaded towards the inside when the mold is in the open position.

To provide a method for producing a tire vulcanizing mold capable of obtaining a tire vulcanizing mold having excellent durability and high precision at low cost and to provide such a tire vulcanizing mold, the method includes producing a tire vulcanizing mold by assembling a pattern molding segment, produced by rapid prototyping, on a metal base segment, the method further includes a step of producing the pattern molding segment from a metal based on a shape of a surface layer part including a pattern shaping surface in a basic model of the tire vulcanizing mold.