| 摘要 |
A method of molding an integrated bearing and resilient wheel structure, for a roller skate or the like, and a resulting product having a single bearing. The bearing of the wheel has a centering surface aligned with the bearing axis and exposed for engagement by a mold. The mold defines the shape of the wheel, including its cylindrical running surface, and includes a centering surface that is centered on the running surface of the wheel and is exposed to engage the bearing. The relative position of the centering surfaces of the mold and bearing are so related that, when the surfaces are interengaged, mold spaces extend from oppositely axially directed surfaces of the rotary bearing part. The mold and bearing centering surfaces are engaged to produce centering, and, while shielding the space between the rotary and stationary parts of the bearing from entry of fluid, the mold is filled with a charge of fluid resin. The charge is allowed to form a resilient body intimately about the rotary part of the bearing, thereby producing an in situ molded, integrated bearing and resilient wheel structure. The resulting wheel structure has resinous flanges, integral with the wheel body, at the oppositely directed surfaces of the rotary bearing part, enabling use of a single bearing.
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