LIQUID BOTTLE CAP AND PROCESS FOR PRODUCING SUCH A CAP

摘要

A liquid bottle cap and injection molding process for producing the cap is disclosed. In the cap, the top cover has an inside plug, which is tightly fitted into the opening of the cap body. The cover also has the snap groove, which tightly engages with the snap hook of the cap body. The cap is thus not undesirably opened and reliably prevents undesirable leakage of the bottled liquid even when a bottle with the cap carelessly falls flat on its side wall or falls from something, for example, a table. In the injection molding process, liquid plastic is injected into top and bottom molds through a gate extending to the cavity part corresponding to the finger-operable ring of the tear-off piece. The finger-operable ring thus has a high tensile strength so that the ring is neither undesirably separated from the tear-off piece nor breaks when the ring is forcibly pulled upward in order to remove the tear-off piece.