초록 ▼

This invention relates to a method for blow molding articles, such as handled containers, having injection molded portions integrally formed with blow molded portions. The method includes forming a tubular blowable parison, blowing this parison in a pre-form mold, and then blowing the pre-form to it

This invention relates to a method for blow molding articles, such as handled containers, having injection molded portions integrally formed with blow molded portions. The method includes forming a tubular blowable parison, blowing this parison in a pre-form mold, and then blowing the pre-form to its final shape in a final blow mold. The utilization of the pre-form mold as an intermediate step makes possible the formation of containers of enhanced physical characteristics, the elimination of external flash or waste portions, and the formation of a final article having an injection molded portion integrated with a biaxially oriented blown portion. The apparatus of the invention includes the means for forming the parison, the pre-form mold, the final blow mold and the means for correlating the operation of these portions of the apparatus to attain the operation of the overall method.

대표청구항 ▼

In a method of reducing scrap and flash in the formation of a container having a seamless blown container body with an asymmetric configuration and an injection molded finish integral with said body, the method including: 1. closing the sections of a sectional pre-form mold onto a thermoplastic pari

In a method of reducing scrap and flash in the formation of a container having a seamless blown container body with an asymmetric configuration and an injection molded finish integral with said body, the method including: 1. closing the sections of a sectional pre-form mold onto a thermoplastic parison having an injection molded finish, and forming a tail portion on said parison, said pre-form mold sections, when closed, defining a first mold cavity; 2. expanding the parison within said first mold cavity to the configuration of a blowable pre-form body having a shape and size intermediate the shape and size of the parison and the container, said pre-form body including an enlarged bulbous region destined to form a portion of the asymmetric configuration of said container; 3. removing the pre-form from the first mold cavity and positioning the pre-form between the sections of a sectional final mold which, when closed, defines a second mold cavity larger than said first mold cavity and conforming to the shape of the blow container body; 4. closing said mold sections to engage the tail portion projecting outside of the mold cavity, the remainder of the pre-form body being confined within the second mold cavity to reduce the formation of flash and scrap material; and 5. expanding said pre-form to the shape of said second mold cavity.