| 摘要 |
A triple parison flowhead apparatus (1) for producing three multi-layer parisons simultaneously. The triple;parison flowhead (1) includes a first parison flowhead (100), a second parison flowhead (200), and a third parison flowhead (300) substantially abutted to one another. Each flowhead (100,200,300) includes a plurality of rings (110, 210, 310) having flow passages (112, 212, 312), defining a center axis (120,220,320), and having an annular flow conduit (122, 222, 322) in fluid communication with the flow passages (112, 212, 312) and a plurality of ports (114, 214, 314). A set of mold plattens (fig. 2, cf. 50) having a width is located adjacent to the first, second, and third parison flowheads (100, 200, 300). The flow passages (112, 212, 312) in each ring are defined by a height and a diameter of each ring, and a combination of the width of the mold plattens (fig. 2, cf. 50) and the flow passages (112, 212, 312) minimizes the center-to-center distances between the three parison flowheads (100, 200, 300).. |
