Flexible plastic tube with a head fitted with a neck to give an opening to spread out the tube contents has a wall covering over the neck opening with a circular notch to allow the cover to be ruptured to clear the opening

摘要

A method of producing a pressed plastic molded tube head (1) with a neck (3) comprises forming a blank in one stage, and compressing the blank in a second stage. A method of producing a pressed plastic molded tube head (1) with a neck (3) comprises forming a blank in one stage, and compressing the blank in a second stage. The unit is molded with a neck which has a covering wall (4) with a notch (5) in the shape of the neck opening contour, and two zones which are structured to resist the mechanical force (F) required to rupture the cover at the level of the notch. One side (7) of the notch is designed to transmit the mechanical force and its other side (8) acts as the bearing. The notch has a section aligned at a slight angle to the neck axis. When the mold is opened, the mechanical force is applied to a part (91) of the upper section of the molding, so that the cover shears at the notch to form the required neck opening.