초록 ▼

An apparatus for producing blow-molded containers having thickened flanges. The apparatus utilizes major mold halves and a plurality of minor mold components disposed within the mold halves to form containers having thickened flanges. The minor mold components allows formation of flanges which are t

An apparatus for producing blow-molded containers having thickened flanges. The apparatus utilizes major mold halves and a plurality of minor mold components disposed within the mold halves to form containers having thickened flanges. The minor mold components allows formation of flanges which are turned down relative to the longitudinal axis of the container. By allowing the mold halves to remain substantially still during the blow-molding process, the tab of material formed at the junction of the mold halves opposite to the feed end of the blow-molding chamber is preserved, thereby facilitating post-processing handling of the container. The thickened flange is formed by pressing together and fusing two layers of blow-molded material. The two layers of the thickened flange may enclose void space, thereby reducing the weight and manufacturing cost of the containers.

대표청구항 ▼

A molding apparatus for producing containers having thickened flanges from a parison of moldable material, said molding apparatus comprising: (a) means for enclosing said parison, said enclosing means comprising a plurality of major mold sections and a plurality of minor mold sections, said pluralit

A molding apparatus for producing containers having thickened flanges from a parison of moldable material, said molding apparatus comprising: (a) means for enclosing said parison, said enclosing means comprising a plurality of major mold sections and a plurality of minor mold sections, said plurality of minor mold sections comprising at least two minor mold sections per container, said major and minor mold sections enclosing a mold chamber, said major mold sections being separable along the longitudinal axis of said containers, whereby when said major mold sections close around said parison, a tail of material will be captured between said major mold sections; and (b) means for expanding said parison of moldable material to contact said major and minor mold sections; said minor mold sections being movable to bring into contact and substantially fuse adjacent layers of said moldable material after said material has been brought into contact with said major and minor mold sections by said expanding means, said thickened flanges being formable without substantially moving said major mold sections and whereby said tail of material will not be detached from said containers during formation of said thickened flanges or release of said containers from said mold chamber.