| 摘要 |
PURPOSE:To exclude an apparatus for sticking a cover, by forming the cover having a tab out of a metal foil coated with a synthetic resin, putting the cover in a mold for molding a bung hole, pouring a molten synthetic resin from a gate and forming thereby the bunghole sticked with the bent cover. CONSTITUTION:A cover having a tab is formed of a metal foil coated with a synthetic resin and the bent cover prepared by bending the tab is placed in a mold for molding a bunghole in such a way that the tab is in the opposite side of a gate of the mold. A molten synthetic resin 11 is poured into the mold from the gate to mold the bunghole to which the bent cover is being sticked. A complicated expensive apparatus for sticking the metal foil on the bunghole can be thereby omitted and it is possible to omit time and labor for sticking the metal foil. |
