| 摘要 |
Extrusion blow molding apparatus (10) having a body mold (12) for forming a body portion (B) of a blow molded container (C) from a blowable, extruded thermoplastic parison (P). The blow molding apparatus also has a neck mold (14) for forming an annular finish portion (15) of the container from the parison, the neck mold being removable from the body mold at the conclusion of the blowing step. A blow pin (16), which is reciprocable relative to the body mold, introduces blowing air into the parison during the blowing cycle, and an outside diameter of the blow pin provides a surface against which an internal diameter of the finish is formed. The process also forms a moil portion (M) that extends upwardly and outwardly from a rim (R) at the top of the finish portion of the container, and an anvil (18) with a moil retention element (18a) with an inwardly projecting flange (18b) is provided in contact with an exterior of the neck mold.
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