Tire manufacturing method
AssigneeSumitomo Rubber Industries, Ltd.
InventorKouji TAKENAKA
Life of this patent
Estimating the term…
Abstract
A tire bead carcass member manufacturing step includes a ply turning-up step, a ply layering step, and a ply turning-down step. In the ply turning-down step, an outer circumferential surface 32a of a ply layered body 32 is supported. While the ply layered body 32 is rotated, a turning-down stitcher 38 turns down axial end portions of a second ply around beads from the radially outer side toward the radially inner side. While the ply layered body 32 is rotated, a layering stitcher 40 operates so as to layer the axial end portions of the second ply having been turned down to an inner side of the ply layered body 32, over an inner circumferential surface of a first ply, to form the bead carcass member.
Claims9
A tire manufacturing method comprising:
- a manufacturing step of manufacturing a bead carcass member;
- a preforming step;
- and
- a vulcanization step, wherein
- the manufacturing step of manufacturing the bead carcass member includes:
- a ply turning-up step of turning up axial end portions of a first ply having been cylindrically wound, around bead members from a radially inner side toward a radially outer side, to form a ply turned-up body;
- a ply layering step of layering a second ply over an outer circumferential surface of the ply turned-up body to form a ply layered body;
- and
- a ply turning-down step of turning down axial end portions of the second ply in the ply layered body, around the bead members from the radially outer side toward the radially inner side, to form the bead carcass member,
- in the ply turning-down step,
- the ply layered body is supported at an outer circumferential surface thereof,
- while the ply layered body is rotated, the axial end portions of the second ply are turned down around the bead members from the radially outer side toward the radially inner side, and
- while the ply layered body is rotated, the axial end portions of the second ply having been turned down to an inner side of the ply layered body are layered over an inner circumferential surface of the ply layered body, to form the bead carcass member,
- in the preforming step, a raw cover including the bead carcass member is formed, and
- in the vulcanization step, the raw cover is placed in a mold, and is vulcanized and molded to obtain a tire.
A manufacturing method for manufacturing a bead carcass member for a tire, the manufacturing method comprising:
- a ply turning-up step of turning up axial end portions of a first ply having been cylindrically wound, around bead members from a radially inner side toward a radially outer side, to form a ply turned-up body;
- a ply layering step of layering a second ply over an outer circumferential surface of the ply turned-up body to form a ply layered body;
- and
- a ply turning-down step of turning down axial end portions of the second ply in the ply layered body, around the bead members from the radially outer side toward the radially inner side, to form the bead carcass member,
- in the ply turning-down step,
- the ply layered body is supported at an outer circumferential surface thereof,
- while the ply layered body is rotated, the axial end portions of the second ply are turned down around the bead members from the radially outer side toward the radially inner side, and
- while the ply layered body is rotated, the axial end portions of the second ply having been turned down to an inner side of the ply layered body are layered over an inner circumferential surface of the ply layered body, to form the bead carcass member.
Dependencies are inferred from the claim text.