| 摘要 |
PURPOSE:To weld a plug to the main body of a container without a gap and to prevent pinholes furthermore by welding two heat welding films made of plastic having heat-welding flexibility to both the plug and the container main body, welding the container main body to the surface of the film, and welding the main body to the plug through the heat welding film. CONSTITUTION:A plug 1 is held, and a flexible heat welding film 7 having a protruding part 7A in the radial direction is welded from the entire surface of the planned part for heat welding. A plug 1 is welded to a container main body 2 through a heat welding film 7. The heat welding film 7 has the heat welding property for both the plug 7 and the container main body 2. At the time of the welding, the heat welding film 7 is freely deformed. Therefore even if the plug 1 is arranged at a part, which is slightly displaced from the accurate position and angle on the opening part of the container main body, the plug 1 and the container main body 2 are securely welded. Furthermore, the plug 1 is securely welded by the two continuous pushings with a heated metal mold, and pinholes are strikingly decreased. |
