Mold for forming a tire and tire production method
AssigneeBridgestone Corporation
InventorYasuyuki ISHIHARA
Life of this patent
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Abstract
Provided are a mold for forming a tire (1) including an annular tread molding part (20) which is configured to be opened and closed by moving a plurality of segments (21) in a radial direction, and a tire production method using the same. In the mold for forming the tire (1), each of the segments (21) includes a design surface dividing mold part (23) including a tread design surface (20a) for forming a tread (2c) of a tire (2), and the design surface dividing mold part (23) is configured to rotate around a rotatable shaft (25) perpendicular to a direction of movement of the segments (21) and also to an axis of the tread molding part (20) when the tread molding part (20) is opened after vulcanization molding of the tire (2).
Claims6
A mold for forming a tire for vulcanization molding of an unvulcanized raw tire into a tire, the mold comprising:
- an annular tread molding part which is divided into a plurality of segments arranged in a circumferential direction and which is configured to be opened and closed by moving each of the segments in a radial direction, wherein
- each of the segments includes
- a design surface dividing mold part which includes a tread design surface for forming a tread of the tire and which is configured to rotate around a rotatable shaft perpendicular to a direction of movement of the segments and also to an axis of the tread molding part when the tread molding part is opened after vulcanization molding of the tire.
A method for vulcanization molding of an unvulcanized raw tire to produce a tire by using a mold for forming a tire comprising an annular tread molding part which is divided into a plurality of segments arranged in a circumferential direction and which is configured to be opened and closed by moving each of the segments in a radial direction, wherein
- when each of the segments is moved toward a radially outer side to open the tread molding part, the tire is released from the tread molding part with a design surface dividing mold part provided on the segment being rotated around a rotatable shaft perpendicular to a direction of movement of the segments and also to an axis of the tread molding part.
Dependencies are inferred from the claim text.