PRESS WORKING METHOD AND PRESS WORKING APPARATUS
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United States of America Patent
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Issued Date -
Dec 7, 2023
app pub date -
May 26, 2023
filing date -
Jun 1, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
A press working method for forming by a press working apparatus, in a film material made of resin, a passage hole through which a fluid for a fuel cell flows, includes a placing step, a gripping step, and a piercing step. In the piercing step, a secondary die and a holder grip an outer peripheral portion of the film material. In the piercing step, a piercing punch punches out the film material is a state in which the press working apparatus does not contact an upper surface of the film material in an adjacent portion surrounding a portion to be punched out by the piercing punch.
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