PLASTIC CLOSURE, CLOSURE AND CONTAINER PACKAGE, AND METHOD OF MANUFACTURE

摘要

A method of making a closure having an end panel (30 or 52) and a sealing liner (32) on one face of the end panel includes providing an injection mold (60) having at least first and second mold elements (62, 66), at least one of which is movable with respect to the other. The first and second mold elements are positioned to form a first mold cavity, and the end panel is injection molded within the first mold cavity. At least one of the first and second mold elements then is moved to form a second mold cavity in which a face of the end panel forms at least one mold cavity wall, and the sealing liner is injection molded onto the face of the end panel. The end panel and liner are then removed from the second mold cavity. The liner/disk subassembly thus is provided more easily and economically than if the liner were compression molded in situ onto the undersurface of a separately formed disk. The closure preferably is a two-piece closure, and the method preferably includes the step of assembling the end panel to a separately formed closure shell.