PRESSED POWDER MOLDED BODY MANUFACTURING METHOD
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United States of America Patent
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Issued Date -
Jul 9, 2020
app pub date -
Jul 5, 2018
filing date -
Jul 10, 2017
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Abstract
A method for producing a green compact, the method including a charging step of charging a raw-material powder including iron-based particles into a cavity formed by a lower punch and a die that are arranged to be movable relative to each other, a pressurizing step of pressurizing the raw-material powder charged in the cavity by the lower punch and an upper punch in order to form a green compact, the upper punch being arranged to face the lower punch, and a drawing step of drawing the green compact from the cavity by a relative movement between the green compact and the die. The drawing step is conducted while vibrations are applied to the green compact for at least part of the period from the time just before the relative movement starts to the time at which the relative movement completes.
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