Extrusion blow molding methods and articles made thereby

Details Extrusion blow molding methods and articles made thereby Extrusion blow molding methods and articles made thereby

B - Operations, Transporting

65

D

B65D 1/02 (2006.01) B29C 49/00 (2006.01) B29C 49/04 (2006.01) B65D 1/10 (2006.01) B65D 1/40 (2006.01)

Patent

CA 2433233

A process for extrusion blow molding an article, and an extrusion blow- molded article, in which a solid radially outwardly extending flange is blown into the tubular side wall of the article. A circumferentially extending groove is formed in the inner surface of the mold that molds the tubular side wall of the article. A parison of molten thermoplastic material is extruded and the parison is inflated by blowing to blow the parison against the walls of a mold. During inflation, the groove is filled by the molten thermoplastic material. The material that filled the groove forms a solid radially outwardly extending flange molded to the tubular side wall of the article. A portion of the article extending above the flange is severed in a single cutting step to form an article having an outward flange at its top end.

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