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公开(公告)号：EP3205490A4
公开(公告)日：2018-04-25
申请号：EP15859331
申请日：2015-11-04
申请人： SUMITOMO RUBBER IND
IPC分类号： B29D30/30
摘要： A pneumatic tire manufacturing method is provided in which raw cover molding is suitably performed with no, or a minimal amount of, down-stitching in the manufacture of SOT-structure pneumatic tires; also provided is a pneumatic tire. This pneumatic tire manufacturing method involves a first cover molding step for molding a first cover having a sidewall, an inner lining, a ply, beads and a tread-side edge, a tread ring forming step for forming a tread ring having a breaker, a band and a tread center part, a shaping step for pressure-bonding the tread ring and the first cover to mold this to the shape of the raw cover, and a turn-up step for bonding the side wall to the lateral surface of the first cover, wherein the tread-side edge is formed in a position adjacent to the end of the tread center portion in the shaping step, and in the turn-up step, the tread-side edge and the tread center part are bonded together.
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公开(公告)号：EP2974891A4
公开(公告)日：2016-11-23
申请号：EP14773807
申请日：2014-01-29
申请人： SUMITOMO RUBBER IND
发明人： SAGAWA TAKAMICHI
CPC分类号： B60C15/0628 , B60C15/0036 , B60C15/0603 , B60C17/0009 , B60C2015/0621 , B60C2015/065 , B60C2015/0678
摘要： A pneumatic tire 1 having a toroidal carcass 6 extending from a tread portion 2 through a sidewall portion 3 to a bead core 5 in a bead portion 4, is provided in the bead portion 4 with a bead reinforcing rubber layer 10 along an outer surface in the tire axial direction of the carcass 6. The bead reinforcing rubber layer 10 is formed from a band-like rubber strip 15 wound spirally circumferentially of the tire. In a tire meridian section including the tire rotational axis, each of the inner surface Si and the outer surface So in the tire axial direction of bead reinforcing rubber layer 10 has adjacent rubber strip 15's interfaces 16, and the number of the interfaces 16 on the inner surface Si is smaller than the number of the interfaces 16 in the outer surface So.
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公开(公告)号：EP3205488A4
公开(公告)日：2018-05-09
申请号：EP15858555
申请日：2015-11-04
申请人： SUMITOMO RUBBER IND
CPC分类号： B60C13/002 , B29D30/30 , B29D30/60 , B29D30/72 , B60C13/009
摘要： A pneumatic tire manufacturing method is provided in which raw cover molding is suitably performed with no, or a minimal amount of, down-stitching in the manufacture of SOT-structure pneumatic tires; also provided is a pneumatic tire. This pneumatic tire manufacturing method involves: a step in which a sidewall, an inner liner, and a ply are bonded on a first molding drum, a pair of beads is set, and the tread side part is formed on the side wall, forming a first cover; a step in which a breaker and band are bonded on a second molding drum and the tread center part is formed on the band, shaping the tread ring; a step in which the first cover is inserted inside of the tread ring and the first cover is inflated, bonding the tread ring and the first cover with pressure; and a step in which the sidewall is folded back towards the lateral surface of the inflated first cover and bonded to the lateral surface of the first cover, and the tread side part and the tread center part are bonded together.
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公开(公告)号：EP3205489A4
公开(公告)日：2018-04-25
申请号：EP15858985
申请日：2015-11-04
申请人： SUMITOMO RUBBER IND
发明人： SAKAMOTO MASAYUKI , UEDA KENJI , SAGAWA TAKAMICHI
IPC分类号： B29D30/30 , B29D30/32 , B29D30/52 , B29D30/60 , B29D30/72 , B60C11/00 , B60C13/00 , B60C19/08
摘要： A pneumatic tire manufacturing method is provided in which winding collapse is prevented, there is no possibility of adverse effects on the FV, a current-carrying layer can be formed easily, and down-stitching can be dispensed with or minimized in the manufacture of SOT-structure pneumatic tires having a base-pen structure in the tread. This pneumatic tire manufacturing method involves: a step in which a sidewall, an inner liner, and a ply are bonded on a first molding drum, beads are set, and the tread side part that will form the current-carrying layer is formed on the side wall, forming a first cover; a step in which a breaker and band are bonded on a second molding drum and the tread center part is formed on the band, shaping the tread ring; a step in which the first cover is inserted inside of the tread ring and inflated to bond to the tread ring with pressure; and a step in which the sidewall is bonded to the lateral surface of the first cover, and the tread side part and the tread center part are bonded together.
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