Tire and a mould for manufacturing a tire
AssigneeNokian Renkaat Oyj
InventorTomi Korkama
Life of this patent
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Abstract
A mould for manufacturing a tire includes a plurality of segments including a first segment. The first segment has a first end, an opposite second end, primary lamella blades that are arranged close to the first end, and secondary lamella blades that are arranged far from both the ends. An average of the heights of the primary lamella blades is at least 75% of an average of the heights of the secondary lamella blades. A bending strength of the primary lamella blades against bending in a circumferential direction of the mould is greater than a bending strength of the secondary lamella blades against bending in the circumferential direction of the mould. A tire is manufactured by the mould.
Claims15
A mould for manufacturing a tire, the mould comprising:
- a plurality of segments including a first segment, the plurality of segments configured to be in a first position and a second position,
- wherein in the first position, the segments are arranged next to each other to form an annular mould for a green tire, and
- wherein in the second position, the segments are arranged apart from each other to remove the tire from the mould, the first segment comprising:
- a first end and an opposite second end,
- a primary region, the whole primary region being arranged at most 20 mm apart from the first end,
- a secondary region, the whole secondary region being arranged at least 25 mm apart from the first end and the second end,
- primary lamella blades are arranged within the primary region and are non-circumferential, and
- secondary lamella blades that are arranged within the secondary region and are non-circumferential,
- wherein:
- the primary lamella blades comprise a first primary lamella blade and a second primary lamella blade adjacent to the first primary lamella blade,
- the secondary lamella blades comprise a first secondary lamella blade and a second secondary lamella blade adjacent to the first secondary lamella blade,
- a distance between a central line of the first primary lamella blade and a central line of the second primary lamella blade is equal to a distance between a central line of the first secondary lamella blade and a central line of the second secondary lamella blade, the central line of each lamella blade remains at a center between two walls of the lamella blade,
- an average of heights of the primary lamella blades is 75% to 110% of an average of heights of the secondary lamella blades, and
- a bending strength of the primary lamella blades against bending in a circumferential direction of the mould is greater than a bending strength of the secondary lamella blades against bending in the circumferential direction of the mould.
Dependencies are inferred from the claim text.