| 摘要 |
A bead forming unit for a press is formed between a blank holder and an upper press portion and forms at least a dual circular bead for controlling a material flow along an edge portion of a material panel during a process for pressurizing the material panel placed between upper and lower press portions to form a product panel. The bead forming unit for a press includes: a bead projection formed to protrude out of the lower die face surface of the blank holder and having at least one dual circular bead groove integrally formed to form a waveform thereto; and a dual circular bead groove formed on the upper die face surface of the upper press portion and having at least one dual circular bead projection integrally formed to form a waveform complementary to the dual circular bead groove.
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