Method and apparatus for blow-molding an article having a...

Details Method and apparatus for blow-molding an article having a... Method and apparatus for blow-molding an article having a...

B - Operations, Transporting

29

C

B29C 49/00 (2006.01) B29C 49/28 (2006.01) B29C 49/48 (2006.01) B29C 49/04 (2006.01) B29C 49/50 (2006.01)

Patent

CA 2458312

A solid outwardly projecting flange is formed on the side wall of a blow- molded article by providing a blow mold having a circumferential groove that is filled by flowable thermoplastic during a blow cycle. The mold includes a heating system locally disposed adjacent the groove for heating the walls of the groove so as to heat the thermoplastic in this region, thereby reducing the viscosity of the thermoplastic so that it more-readily flows into and completely fills the groove. The mold can also include a cooling system disposed locally adjacent the groove for cooling the flange of the blow-molded article prior to ejection of the article from the mold.

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