The present invention prevents the defects of tread defects during mold opening or damage to a sipe blade forming a sipe. A pneumatic tire according to the present embodiment is provided with a sipe row (50) in which a plurality of sipes (50A, 50B) are provided at intervals in the tire circumferential direction on a tread (10), and division traces provided at division positions of segments (102), in a region sandwiched between adjacent division traces (19) in the tire circumferential direction (CD), a plurality of sipes (50A, 50B) are provided in the sipe row (50), and a plurality of sipes (50A, 50B) are provided at intervals in the tire circumferential direction (CD). If the range from the tire circumferential center (PC) to the division trace (19) to a predetermined angle is defined as a center region (R1), and the range from the outside of the center region (R1) to the division trace (19) is defined as a segment end region (R2). The angle ([theta] 2B) of the sipe (50B) provided in the segment end region (R2) with respect to the tire axial direction (AD) is larger than the angle ([theta] 2A) of the sipe (50A) provided in the center region (R1) with respect to the tire axial direction (AD).
本发明防止在开模时胎面缺损,或形成刀槽花纹的刀槽花纹刀片破损的不良情况。本实施方式的充气轮胎在胎面(10)上具备:多个刀槽花纹(50A、50B)在轮胎周向上空出间隔设置而成的刀槽花纹列(50),以及设置于扇形段(102)的分割位置的分割痕迹,在被轮胎周向(CD)上相邻的分割痕迹(19)夹持的区域中,若将从轮胎周向中央(PC)朝向分割痕迹(19)直到规定角度为止的范围设为中央区域(R1)、将从中央区域(R1)的外侧到分割痕迹(19)的范围设为扇形段端区域(R2),则设置于扇形段端区域(R2)的刀槽花纹(50B)相对于轮胎轴向(AD)的角度(θ2B)比设置于中央区域(R1)的刀槽花纹(50A)相对于轮胎轴向(AD)的角度(θ2A)大。
Pneumatic tire and tire vulcanization molding mold
充气轮胎以及轮胎硫化成型模具
2024-09-20
Patent
Electronic Resource
Chinese
PNEUMATIC TIRE AND TIRE VULCANIZATION MOLDING METAL MOLD
European Patent Office | 2024
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