Method for producing hollow molded article

Details Method for producing hollow molded article Method for producing hollow molded article

B - Operations, Transporting

29

D

B29D 22/00 (2006.01) B29C 45/14 (2006.01) B29C 45/17 (2006.01) B29C 45/56 (2006.01)

Patent

CA 2060847

- 13 - ABSTRACT OF THE DISCLOSURE A hollow molded article is produced by supplying a molten resin between a pair of a mixed mold and a movable mold before the mixed mold and the movable mold are closed, inserting at least one gas-supplying pin which is provided on a surface of the mixed mold to form a hollow part in a part of the resin and supplying pressurized gas through said gas-supplying pin before or at the same time at the mold closing is finished, closing the movable mold to fill the resin in a cavity formed by the mods, slightly opening the molds while pressurizing a gas in the resin to expand the hollow part and opening the movable mold to remove a hollow molded article from the molds.

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