Process of stretch-blow molding
    9.
    发明授权
    Process of stretch-blow molding 失效
    拉伸吹塑成型工艺

    公开(公告)号:US5213752A

    公开(公告)日:1993-05-25

    申请号:US877246

    申请日:1992-05-01

    IPC分类号: B29C49/06 B29C49/12

    摘要: The process and apparatus of stretch-blow molding a preform in the axial and radial directions into a biaxially oriented container by the use of a stretching rod assembly and a blowing of pressurized fluid. In the axially stretching step, the surface area of the working end of the stretching rod assembly is changed. The axially stretching step is carried out through a plurality of stages each of which provide a different surface area of the working end of the stretching rod assembly. The apparatus preferred to carry out this process has a plurality of concentrically disposed stretching rods and an tip piece fixedly mounted on the working end of each of the stretching rods and having an external diameter at the surface area different from those of the other stretching rods. When such stretching rods are driven independently or in combination, the bottom surface area of the stretching rod assembly to be engaged by the inner bottom wall of the preform can be easily changed.

    摘要翻译: 通过使用拉伸杆组件和加压流体的吹送将预成型件沿轴向和径向拉伸吹塑成双轴取向的容器的方法和装置。 在轴向拉伸步骤中,拉伸杆组件的工作端的表面积改变。 轴向拉伸步骤通过多个阶段进行,每个阶段提供拉伸杆组件的工作端的不同表面积。 优选实施该方法的装置具有多个同心设置的拉伸杆和固定地安装在每个拉伸杆的工作端上并且在与其它拉伸杆的表面区域不同的表面积处具有外径的尖端件。 当这种拉伸杆被独立地或组合地驱动时,可以容易地改变拉伸杆组件的与预成型件的内底壁接合的底面积。