To restrain such thinning that thickness of an upright wall connected to a disposable bag part of an intermediate body becomes small.SOLUTION: A hollow member molding method includes: a first step of molding an intermediate body having a closed hollow space; and a second step of molding a hollow member which is a remainder part obtained by opening one part of the intermediate body by removing a disposable bag part having a bottom wall part which is one part of the intermediate body molded in the first step. In the first step, the intermediate body is molded, so that a first step bending part having a first flange part extending inwardly of the hollow space from an opening side tip of a side wall of the remainder part and a first upright wall part extending to a bottom of the disposable bag part from an inward tip of the first flange part is formed at the remainder part, and a second step bending part having a second upright wall part extending to the bottom in continuous with the bottom tip of the first upright wall part of the first step bending part, a second flange part extending inwardly of the hollow space from the bottom tip of the second upright wall part, and a third upright wall part extending to the bottom from an inward tip of the second flange part is formed on the disposable bag part.SELECTED DRAWING: Figure 8
【課題】中間体の捨て袋部に接続する立壁部の厚さが小さくなる薄肉化を抑えること。【解決手段】中空部材の成形方法は、閉塞した中空空間を有する中間体を成形する第1工程と、第1工程により成形された中間体の一部である、底壁部を有する袋状の捨て袋部を除去することにより、中間体の一部を開口させた残部である中空部材を成形する第2工程と、を備える。第1工程は、上記の残部に、残部の側壁の開口側先端から中空空間の内方に延びる第一フランジ部と第一フランジ部の内方先端から捨て袋部の底方に延びる第一立壁部とを有する第一段差屈曲部が形成されると共に、上記の捨て袋部に、第一段差屈曲部の第一立壁部の底方先端に連続して底方に延びる第二立壁部と第二立壁部の底方先端から中空空間の内方に延びる第二フランジ部と第二フランジ部の内方先端から底方に延びる第三立壁部とを有する第二段差屈曲部が形成されるように、中間体を成形する。【選択図】図8
HOLLOW MEMBER MOLDING METHOD
中空部材の成形方法
2020-04-02
Patent
Electronic Resource
Japanese
IPC: | F24F Klimatisierung , AIR-CONDITIONING / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
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