INJECTION MOLDING MACHINE AND INJECTION MOLDING MACHINE SCREW FOR INJECTING MOLTEN RESIN IN WHICH THERMOPLASTIC RESIN AND REINFORCING FIBERS HAVE BEEN MIXED AND MELTED

    公开(公告)号:US20190118441A1

    公开(公告)日:2019-04-25

    申请号:US15780013

    申请日:2016-11-29

    IPC分类号: B29C45/60 B29C45/50 B29C45/00

    摘要: An injection molding machine and screw therefor with which, when mixing reinforcing fibers in a molten resin and injection molding same, the reinforcing fibers can be uniformly dispersed in the molten resin. For a screw provided in an injection molding machine, a mixing section is provided on the downstream side of a compression section. Three helical flights (x, y, z) are provided in the mixing section and three grooves, which are helically disposed in the opposite or the same direction as the orientation of the flights, are formed. As a result of the grooves, it is possible to keep the fiber lengths of the reinforcing fibers long and even if the reinforcing fibers become tangled in the compression section, the fibers are defibrated in the mixing section, the shearing of long fibers in the molten resin is mitigated, the reinforcing fibers are dispersed uniformly and a good product is obtained.