US 12,145,341 B2
Method for producing pneumatic tires, tire mold, and pneumatic tires
Atsuya Hatano, Hiratsuka (JP)
Assigned to The Yokohama Rubber Co., LTD., Tokyo (JP)
Appl. No. 16/606,181
Filed by The Yokohama Rubber Co., LTD., Tokyo (JP)
PCT Filed Apr. 18, 2018, PCT No. PCT/JP2018/015973
§ 371(c)(1), (2) Date Oct. 17, 2019,
PCT Pub. No. WO2018/194081, PCT Pub. Date Oct. 25, 2018.
Claims priority of application No. 2017-083562 (JP), filed on Apr. 20, 2017.
Prior Publication US 2020/0130310 A1, Apr. 30, 2020
Int. Cl. B29D 30/72 (2006.01); B29C 33/42 (2006.01); B29D 30/06 (2006.01); B60C 13/00 (2006.01)
CPC B29D 30/72 (2013.01) [B29C 33/42 (2013.01); B29C 33/428 (2013.01); B29D 30/0606 (2013.01); B60C 13/001 (2013.01); B29D 2030/0612 (2013.01); B29D 2030/726 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for manufacturing a pneumatic tire, the method comprising:
attaching a replaceable member including a smooth flat surface to a mold body of a tire mold configured to vulcanize an unvulcanized tire into a predetermined shape by contact with the unvulcanized tire, and forming a mold inner surface including a curved surface of the mold body and the flat surface surrounded by the curved surface, the mold inner surface being configured to form shapes of sidewall portions and bead portions of a vulcanized tire, the replaceable member being inserted into a recess provided in the mold body, both the replaceable member and the recess are rectangular in shape;
vulcanizing the unvulcanized tire by bringing the unvulcanized tire into contact with the mold inner surface and manufacturing a vulcanized tire; and
manufacturing a pneumatic tire by engraving a two-dimensional code in a planar surface region of at least one of the sidewall portions or the bead portions of the vulcanized tire after the vulcanizing, the planar surface region corresponding to the flat surface, the two-dimensional code including a dot pattern formed by two types of gray scale elements formed identifiable from each other by surface unevenness.