Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1996-03-19
1998-07-21
Bonck, Rodney H.
Machine element or mechanism
Control lever and linkage systems
Elements
B62D 104
Patent
active
057821402
ABSTRACT:
A steering wheel core metal unit comprising a boss section, a boss/spoke connecting section, spoke sections and a ring section integrally die-cast, with the boss section serving as an insert. Before trimming and after being released from a die caster, the boss/spoke connecting section of the core metal unit is provided with a gate section and the ring section comprises a pair of inside and outside ribs. Overflow sections are provided along the outer periphery of the ring section at substantially the intermediate positions among the spoke sections, respectively. The sectional area of the outside rib is made larger than that of the inside rib so that a final molten metal merging portion comes to lie at the outer periphery of the ring section. Accordingly, even when the molten metal moves in the cavity of the die caster as it entrains air, the air can escape from the overflow sections and no blowhole is formed in the core metal as a die cast product.
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Koyama Tooru
Mori Kenji
Battista Mary Ann
Bonck Rodney H.
Toyoda Gosei Co,., Ltd.
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