subject: Mechanism Of Cap Mould [print this page] In accordance with this invention, it is proposed to form a mold wherein the cap mould member which receives the core from the bottom edge of the cavity and the cavity is primarily formed in a second mold member into which the upper end of the coreprojects. The second mold member has an irregular parting line with the first mentioned mold member, with the first mentioned mold member forming only a portion of the periphery of the cavity. Further, the closure cap is modified so that it has nothreads along that portion of the cavity which is defined by the first mentioned mold member. Thus, when the mold is opened, the second mold member moves away from the molded closure cap externally to release that portion of the closure cap body havinginternal threads formed thereon so that the molded closure cap is immediately ready to be stripped from the core and the stripping may be effected by the first mentioned mold member also functioning as an ejector block and being movable relative to thecore.
This relates to a cap mould for forming closure caps and like cap-like members having a peripheral body with internal threads. The mold is constructed to have an irregular parting line with the result that a major part of the body of the closure cap may be externally defined by that mold member which is moved to an out-of-the-way position when the mold is opened, leaving the injection molded closure cap body free for radial expansion and thus permissible stripping of the closure cap from the core about which it is molded.
A cap mould according to claim 1 wherein said second mold member is first movable away from said core and said first mold member to remove said second mold member out of a restraining position relative to a molded closure cap body portion havingan internal thread thereon.
