BI-INJECTED CAP, AND METHOD FOR MANUFACTURING SUCH A CAP

摘要

The disclosure includes a cap having a first portion made of a plastic material and forming a bottom for covering a container neck and a protective side wall for surrounding the container neck, and a second portion made of a flexible material that is compatible with the plastic material of the first portion and separate from the plastic material of the first portion, the second portion being annular and consisting of a flexible seal, which projects from the bottom toward the interior of the side wall and which is welded to the first portion. Thus, the manufacture of the stopper by molding includes injecting a flexible material to produce the flexible annular seal and then the movable portions of the mold are placed such that the flexible material is in a groove that is set back from the planar surface of the mold.

主权项

1. A cap comprising:
a first portion made of a plastic material, forming a bottom for covering a container neck and a protective side wall for surrounding the container neck, the first portion including two annular grooves separated by an annular protuberance; and a second portion made of a flexible material that is compatible with the plastic material of the first portion and separate from the plastic material of the first portion, the second portion being annular and consisting of a flexible seal, which projects from the bottom toward the interior of the side wall and which is welded to the first portion, the second portion being welded to the annular protuberance.