Manufacturing method of rubber member for tire
OwnerNorio HAYASHI, Toshihiko Omokawainventors
Life of this patent
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Abstract
The invention can reduce a step between rubber strips even in the case that the rubber strip is made thick, and inhibits a reduction of uniformity and tire quality, a deterioration of a tire outer appearance, and the like. A rubber strip (10) may be scalene triangular shape, a trapezoidal shape or a parallelogram shape having has a bottom line (11) forming a strip width (W), a first diagonal line (12) extending from one end of the bottom line (11) and a second diagonal line (13) extending from the other end (P2) of the bottom line (11), a length (L0) of the bottom line is set to 5 to 50 mm, and a thickness (T) thereof is set to 0.2 to 5.0 mm.
Claims10
A method for forming a rubber member by overlapping and winding at least one rubber strip in a circumferential direction and in a spiral shape,
- wherein
- said at least one rubber strip has a thickness T in a range of from 0.2 to 5.0 mm, and a cross sectional shape defined by a bottom line, a first diagonal line extending from one end of the bottom line, a second diagonal line extending from the other end of the bottom line, and an upper line parallel to the bottom line,
- wherein
- the bottom line has a length (L0) in a range of from 5 to 50 mm,
- the angle between the first diagonal line and the bottom line is in a range of more than 45 degrees but not more than 80 degrees,
- the angle between the second diagonal line and the bottom line is in a range of more than 45 degree but not more than 80 degrees to form the trapezoidal cross sectional shape, or alternatively, in a range of not less than 100 but less than 135 degrees to form the parallelogram cross sectional shape,
Dependencies are inferred from the claim text.