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    HOLLOW BODY MOLDING DEVICE
    1.
    发明公开
    HOLLOW BODY MOLDING DEVICE 有权
    空心体形式器件

    公开(公告)号：EP2656999A4

    公开(公告)日：2015-01-21

    申请号：EP11851965

    申请日：2011-11-30

    申请人： RP TOPLA LTD

    发明人： SAKAMOTO TOMOYOSHI ,  OJIRO MINORU ,  HIROSE TAKASHI ,  HATA YASUHIKO ,  KATAGIRI HIROKI

    IPC分类号： B29C45/26 ,  B29C45/00 ,  B29C45/17 ,  B29L23/00

    CPC分类号： B29C45/2628 ,  B29C45/0055 ,  B29C45/1704 ,  B29C45/1711 ,  B29C45/261 ,  B29C45/2669 ,  B29C2045/0087 ,  B29C2045/1719

    摘要： The present invention provides a hollow body molding device which allows easy confirmation of passage of a floating core through a molded body and facilitates quality control at the site. In a hollow body molding device in which a molten resin is injected into a main cavity 1, a pressurized fluid is pressure-injected through a pressure port 3 after the injection of the molten resin, a floating core 2 is moved to the outlet side, the molten resin is extruded from the outlet simultaneously with the movement of the floating core 2, and a hollow molded body 12 is molded, the hollow body molding device is provided with a floating core storage portion 6 which is connected to the main cavity 1 and stores the floating core 2 moved by the pressurized fluid, an auxiliary cavity 10 which stores a molten resin discharged from the main cavity 1 and the floating core storage portion 6, communication passages 7 and 9 which communicate the floating core storage portion 6 and the auxiliary cavity 10 with each other; and an opening and closing means 8 that opens and closes the communication passages 7 and 9 by sliding movement. In the hollow body molding device, each inlet cross-sectional area B of the communication passages 7 and 9 is B

    HOLLOW BODY MANUFACTURING METHOD
    2.
    发明公开
    HOLLOW BODY MANUFACTURING METHOD 有权
    一种用于生产空心体

    公开(公告)号：EP2418063A4

    公开(公告)日：2012-09-12

    申请号：EP10761288

    申请日：2010-01-21

    申请人： RP TOPLA LTD

    发明人： SAKAMOTO TOMOYOSHI ,  OJIRO MINORU ,  KATAGIRI HIROKI

    IPC分类号： B29C45/00 ,  B29C45/17 ,  B29C45/33 ,  B29C45/37 ,  B29D23/00 ,  B29L23/00

    CPC分类号： B29C45/1704 ,  B29C45/1711 ,  B29C2045/0087 ,  B29C2045/1707 ,  B29C2045/1719 ,  B29C2045/1724 ,  B29L2023/005 ,  B29L2023/22

    摘要： A hollow body formed of a thermoplastic resin and having uniform inner diameter and thickness and an excellent inner surface smoothness, and, in particular, a pipe-shaped hollow body having a bent portion is manufactured by injection molding. A method of manufacturing a hollow body includes injecting a molten resin 8 into a mold cavity 2 of a mold 1, the mold cavity 2 having on its one end a pressure port 4 provided with a floating core 6 and on its other end an outlet 5, pressure-injecting a pressurized fluid through the pressure port 4 after the injection of the molten resin 8, and moving the floating core 6 toward the outlet 5, and, at the same time, extruding the molten resin 8 from the outlet 5. In the method, the floating core 6 is constituted of a columnar portion and a top portion, which is continuously connected to one surface of the columnar portion and has a shape that a cross-sectional area perpendicular to a central axis of the columnar portion gradually decreases from one surface side of the columnar portion. When a diameter of the columnar portion is represented by A, the height of the columnar portion is 0.1 A to 1 A, and the height of the top portion is 0.3 A to 1.6 A.

    METHOD OF MANUFACTURING PIPE WITH BRANCH
    3.
    发明公开
    METHOD OF MANUFACTURING PIPE WITH BRANCH 有权
    工艺生产具有JUNCTION管

    公开(公告)号：EP2384877A4

    公开(公告)日：2012-05-30

    申请号：EP10735606

    申请日：2010-01-21

    申请人： RP TOPLA LTD

    发明人： OJIRO MINORU ,  SAKAMOTO TOMOYOSHI ,  KATAGIRI HIROKI

    IPC分类号： B29C45/17

    CPC分类号： B29C45/1704 ,  B29C45/1711 ,  B29C2045/0087 ,  B29C2045/1724 ,  B29L2023/22

    摘要： The present invention provides a method of manufacturing a pipe with a branch, which utilizes the conventional pipe molding method using a floating core, and while taking advantage of the pipe molding method, various types of pipes with a branch can be integrally molded with a synthetic resin with high efficiency. The method comprises injecting a molten resin into a main cavity 4, which has on its one end a pressure port 2 provided with a floating core 1 and on its other end a first outlet 3, and a branch cavity 5, which communicates with the main cavity 4 and has on its end a second outlet 6 allowed to open and close, pressure-injecting a pressurized fluid through the pressure port 2 after the injection of the molten resin, and moving the floating core 1 to the first outlet 3 side, and, at the same time, extruding the molten resin from the first outlet 3 to form a main pipe hollow, and opening the second outlet 6 after the main pipe hollow reaches a portion at which the branch cavity 5 communicates with the main cavity 4, and extruding the molten resin by the pressurized fluid from the second outlet 6 to form the branch pipe hollow.