Gear manufacturing method and gear
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United States of America Patent
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Apr 16, 2024
Grant Date -
Feb 23, 2023
app pub date -
Dec 16, 2020
filing date -
Dec 16, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A gear manufacturing method, the gear including an annular gear portion including teeth on an outer periphery, an annular support portion provided on an inner peripheral surface of the gear portion and supporting the gear portion, and a core portion provided inside the support portion, the method includes: a support portion molding step of molding the support portion by disposing the gear portion and the core portion in an annular mold and filling a resin between the gear portion and the core portion; and a support portion cooling step of cooling the support portion molded in the support portion molding step, a radial gap between the teeth of the gear portion and the mold before the support portion molding step is set to be smaller than a radial shrinkage amount of the support portion in the support portion cooling step.
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