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AssigneesToyoda Gosei Co., Ltd., Kolbenschmidt Aktiengesellschaft
InventorsToru Abiko, Katunobu Sakane, Mitsuru Harata, Hiroshi Yasuda
Estimating the term…
A method of manufacturing a steering wheel, in which a coating layer is molded of a synthetic resin, by using a molding die unit, on at least the annular portion of a steering wheel core including a boss. The annular portion is located around the boss and has a groove extending in the circumferential direction thereof. Spokes couple the boss and the annular portion to each other. The method includes a die opening step in which an upper molding die and a lower molding die, which have a gate formed at the separation surfaces of the dies and communicating with the molding cavity of the die unit, are opened from each other. The second step is a core setting step in which the core is set in the cavity so that the outermost part of the groove of the annular portion having walls defining the groove between them is located as the top of the groove, one of the walls, which faces the gate and has a notched part notched to be smaller in height than the other of the walls, faces the gate at the notched part, and the top of the notched part is located below the separation surfaces. Third, a coating layer molding step is carried out in which the dies are closed on each other and the resin is injected into the cavity through the gate so that the coating layer is molded of the resin on the core. Last and a steering wheel takeout step in which the dies are opened from each other and the wheel is taken out from the dies is accomplished.
A method of manufacturing a steering wheel, said steering wheel including a center boss portion, a core member having an annular portion located around said boss portion, and at least one spoke coupling said boss portion to said annular portion of the core member, said steering wheel also including a coating layer on said annular portion, said annular portion having an inner circumferential wall and an outer circumferential wall radially disposed opposite one another and connected by a bottom wall so that said annular portion has a substantially U-shaped cross section, wherein one of said inner and outer circumferential walls has a notched portion provided thereon, said method comprising the steps of:
A method of manufacturing a steering wheel comprising the steps of:
Dependencies are inferred from the claim text.