Method for molding annular member and apparatus for molding annular member
Abstract:
The object of the present invention is to provide a method and an apparatus for molding an annular member capable of accurately molding an annular member into a predetermined cross-sectional shape even if the annular member has a thick-walled inner peripheral part and a thin-walled outer peripheral part. The method for molding a bead filler (11) including a thick-walled inner peripheral part (11a) and a thin-walled outer peripheral part (11b), the method comprising the steps of extruding, into an annular shape, rubber (R1) by a first extruder (30) onto a molding table (20) through a first die (31) provided with an opening having the same cross-sectional shape as that of the inner peripheral part (11a) while the molding table (20) is rotated, and molding the inner peripheral part (11a); and extruding, into an annular shape, rubber by a second extruder (40) onto the molding table (20) through a second die (41) provided with an opening having the same cross-sectional shape as that of the outer peripheral part (11b) while the molding table (20) is rotated, and molding the outer peripheral part (11b).
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