| 摘要 |
A method of forming a head on a thermoplastic container wherein a molten disc seals a tubular element and, while the disc is still in a moldable state, the disc is formed into a head using either a fluid pressure, a vacuum, or both. A sealing head on an internal sealing mandrel has a first shoulder thereabout which is complementary with a second shoulder about a mold cavity, which trap the periphery of the disc and the head is formed in a configuration conforming to the mold cavity fluid pressure injected through the internal sealing mandrel, through a vacuum pulled through the mold form containing the cavity, or by use of both said fluid pressure and said vacuum. |
