To produce an inlet duct made of a non-woven fabric whose intake noise is suppressed with high productivity by using a heating, compression and molding method.
According to this method, a non-woven fabric sheet including a thermoplastic resin binder is disposed respectively between an upper die 2 and a core die 3 and between a lower die 4 and the core die 3, then heated, compressed and molded to form an upper molded body 5 and a lower molded body 6. Then, the core die 3 is removed and the upper molded body 5 and the lower molded body 6 are heated and compressed between the upper die 2 and the lower die 4 and connected together to form a tubular integral molded body. Thus, a welding operation is carried out in the dies, so that another welding process is not necessary.
YASUDA ZENICHI
FUJIWARA KAZUO
SAKAKIBARA YASUO
HIROSE YOSHIKAZU
ISHIHARA HIDETOSHI
