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US 5,310,328 AGranted
Green tire forming apparatus
AssigneeSumitomo Rubber Industries, Ltd.
InventorsHisashi Imai, Shinji Hayase, Shousaku Anzai, Kenichi Masuda, Masaaki Iimura
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AssigneeSumitomo Rubber Industries, Ltd.
InventorsHisashi Imai, Shinji Hayase, Shousaku Anzai, Kenichi Masuda, Masaaki Iimura
Estimating the term…
A green tire forming apparatus has a driving section (2) and a forming section (1) supported by a shaft extended from the driving section (2). A center former section (10) of the forming section (1) has a pair of first former elements (11A), (11B) and a pair of second former elements (12A), (12B) arranged at the outside of the first former elements so as to be movable in an axial direction. The total width of the center former section can be shortened to about one fourth of the maximum. According to the apparatus, during green carcass formation, the width of the center former section (10) can be set as the required one, and during toroidal shaping, the width can be shortened to about one fourth of the maximum, whereby a distance (BW.sub.3) between beads can be made close to that of a metal mold. As a result, generation of wrinkles during tire formation is largely decreased and tire quality can be improved.
A green tire forming apparatus comprising a driving section and a forming section supported by a shaft extended from the driving section wherein a center former section of the forming section comprises a pair of first former elements and a pair of second former elements, the pair of first former elements being simultaneously movable in opposed directions and the pair of second former elements being simultaneously movable in opposed directions, each one of the pair of first elements being adjacent one of the pair of second elements, adjacent first and second formed elements moving in a first direction while the other adjacent first and second former elements move in a second direction, the first and second directions being opposite directions, and the first and second former elements overlap for substantially a whole width of the elements when movement to a first position is complete, the pair of first and second former units thereby forming a four layered unit.
Dependencies are inferred from the claim text.