| 摘要 |
PURPOSE: A manufacturing method of a reentrant corner piece membrane is provided to reduce manufacturing time and improve quality by omitting welding processes and reducing failure rate. CONSTITUTION: A reentrant corner piece membrane comprises a first corrugated part, a second corrugated part, and a curved part. The first corrugated part and the second corrugated part are bent at a constant angle to each other. The curved part is expanded between the first and the second corrugated parts across the first and the second corrugated parts. A manufacturing method of the reentrant corner piece membrane comprises followings. The first corrugated part, the second corrugated part, and the curved part are molded at a time using a mold press. A step portion(29) formed by joggling the corrugated part and the second corrugated part.
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