摘要:
A primary formed body is formed by fitting bead rings to outside end portions of a cylindrical body having an inner liner, a film layered on an outer peripheral side of the inner liner, and a carcass material disposed on an outer peripheral side of the film. A green tire is formed on an outer peripheral surface of a rigid inner mold by prevulcanizing the inner liner in a state where a center portion of the primary formed body bulges toward an outer peripheral side, and is held by suction on an inner peripheral surface of a transferring/holding mold to the outer peripheral surface of the rigid inner mold, placing the rigid inner mold inside the primary formed body, then suspending the suction with the transferring/holding mold, and transferring the primary formed body to the outer peripheral surface of the rigid inner mold. The green tire is vulcanized.
摘要:
A forming device having a rotating frame (1) and a forming blade (2) movable in the axial and radial directions of the rotating frame. One side-edge portion of a tubular blank (B) is fixed to a predetermined position of the rotating frame (1), and the other side-edge portion is movably set on the rotating frame. While the rotating frame (1) is rotated, the forming blade (2) is pressed to the inner diameter side or the outer diameter side of a peripheral wall of the tubular blank (B). The forming blade is reciprocated from the fixed side-edge portion radially outward or inward and moved toward the movable side-edge portion. Thus, a tubular formed body in which at least a ridge portion or a recess portion continuing in circumferential direction is shaped in the peripheral wall is formed.
摘要:
A method of manufacturing a support body for run flat, wherein in a case where the circumferential wall of a tubular blank B is pressingly held between inner and outer molding rollers 1 and 2 and where the molding rollers 1 and 2 are rotated to form at least one circumferentially continuous protruding part on the circumferential wall of the tubular blank B to process the tubular blank B into an annular shell, a molding roller having the maximum outer diameter that is substantially the same as the inner diameter of the tubular blank B is used as the inner molding roller 1.
摘要:
A primary formed body is formed by fitting bead rings to outside end portions of a cylindrical body having a film and a carcass material disposed on an outer peripheral side of the film. A green tire is formed on a rigid inner mold by causing a center portion of the primary formed body to bulge toward an outer peripheral side, and holding the center portion by suction on the inner peripheral surface of the transferring/holding mold having a similar shape to the outer peripheral surface of the rigid inner mold, and suspending the suction with the transferring/holding mold, and transferring the primary formed body to an outer peripheral surface of a bladder. The bladder has a uniform thickness and an outer peripheral surface in a neutral state similar to a profile of an inner peripheral surface of a tire to be produced. The green tire is vulcanized.
摘要:
A forming device having a rotating frame (1) and a forming blade (2) movable in the axial and radial directions of the rotating frame. One side-edge portion of a tubular blank (B) is fixed to a predetermined position of the rotating frame (1), and the other side-edge portion is movably set on the rotating frame. While the rotating frame (1) is rotated, the forming blade (2) is pressed to the inner diameter side or the outer diameter side of a peripheral wall of the tubular blank (B). The forming blade is reciprocated from the fixed side-edge portion radially outward or inward and moved toward the movable side-edge portion. Thus, a tubular formed body in which at least a ridge portion or a recess portion continuing in circumferential direction is shaped in the peripheral wall is formed.
摘要:
A tire/wheel assembly in which a run-flat support member 3 is inserted into a cavity of a pneumatic tire 2, where the run-flat support member 3 includes a circular shell 4 in which the outer circumferential side thereof is used as a support surface and the inner circumferential side thereof is opened to have two leg portions, and elastic rings 5 supporting the ends of the two leg portions on a rim. An air path 7 is provided in the elastic ring 5 so as to interconnect the inside and outside of the run-flat support member 3.
摘要:
A pneumatic tire includes: an annular structure that is cylindrical and metal where at least an outer side surface in the radial direction is a rough surface; a tread rubber layer that will become a tread portion provided along a circumferential direction of the annular structure on an outer side of the annular structure; and a carcass portion including fibers covered with rubber, provided on at least both sides in a direction parallel to a center axis of the cylindrical structure including the annular structure and the tread rubber layer.
摘要:
A green tire of a pneumatic tire, including a cylindrical annular structure, an unvulcanized rubber layer, which will become a tread portion, provided along a circumferential direction of the annular structure on an outer side of the annular structure, and a carcass portion including fibers covered with rubber, provided on at least both sides in the width direction of a cylindrical structure including the annular structure and the unvulcanized rubber layer, is disposed in a vulcanization mold. The vulcanization mold is split into the side plates and the sector at a position on the inner side in the width direction of the annular structure. Next, the bladder inside the green tire is pressurized after closing the side plates and prior to closing the sector. Then the sector is closed and vulcanization is started.
摘要:
A pneumatic tire including a cylindrical annular structure, a rubber layer that will become a tread portion provided along a circumferential direction of the annular structure, on an outer side of the annular structure, and a carcass portion including fibers covered by rubber, provided on both sides in a direction parallel to a center axis (Y-axis) of a cylindrical structure including the annular structure and the rubber layer.
摘要:
Provided is a bisplit mold for tire forming capable of avoiding the pinching of the unvulcanized tire at the mold clamping. Also provided is a process for manufacturing a tire by use of the bisplit mold. The bisplit mold includes: a plurality of segments provided to each of the paired containers, and formed by being divided in the tire circumferential direction and; opening-closing means provided to the respective containers, cause the superior and the inferior segments to come close to and separate away from each other, the segments being attached to the pair of containers with vertically bisplit center plates placed between the pair of containers; a superior side plate and an inferior side plate provided respectively to the pair of containers; and vertically bisplit mold pieces provided to the inner sides of the segments.