Patent ID: 11865800
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 11:
12. The tire mold according to claim 1, wherein
when a distance from the reference virtual point of intersection to the reference tangent point on a first side of the first projection side is denoted by Xw1m, a distance from the reference virtual point of intersection on the first side of the first projection to the reference virtual point of intersection on a second side of the second projection is denoted by Wcm, a cross-sectional area of the first projection is denoted by Sam, and a cross-sectional area of the second projection is denoted by Sbm, the distance Xw1m from the reference virtual point of intersection to the reference tangent point on the second side is set such that the following formula (1) is satisfied,

Sam/(Sam+Sbm)×100−10≤Xw1m/Wcm×100≤Sam/(Sam+Sbm)×100+10  (1),

a ratio of the distance from the reference virtual point of intersection to the reference boundary point to the cross-sectional area of the first projection is not less than 0.0008 and not greater than 0.0040,
any position that is on a virtual line of the reference side surface and that is between the reference boundary point and the reference virtual point of intersection is a vertical point,
a circular arc that passes through the vertical point and that is tangent to the reference forming surface at the reference tangent point is a tangent point-side circular arc,
any position that is on the reference forming surface and that is between the reference tangent point and the reference virtual point of intersection is a horizontal point,
a point of intersection of the tangent point-side circular arc and a normal line that passes through the horizontal point and that is normal to the reference forming surface is an intermediate boundary point,
a circular arc that passes through the reference boundary point and that is tangent to the tangent point-side circular arc at the intermediate boundary point is a boundary-side circular arc, and
of the contour of the curved land surface-forming portion, a contour from the reference tangent point to the intermediate boundary point is represented by the tangent point-side circular arc, and a contour from the intermediate boundary point to the reference boundary point is represented by the boundary-side circular arc,
a ratio of a distance from the reference virtual point of intersection to the vertical point to the distance from the reference virtual point of intersection to the reference boundary point is not less than 0.40 and not greater than 0.60, and
a ratio of a distance from the reference virtual point of intersection to the horizontal point to the distance from the reference virtual point of intersection to the reference tangent point is not less than 0.40 and not greater than 0.60.