Patent ID: 6428734
Filing Date: 2002-08-06
Classification: B29C,B29L,B65D,Y10S

Abstract:
A process for manufacturing an injection molded object of thermoplastic material comprising:providing a cavity formed by a first mold and a second mold with side walls positioned between the first mold and second mold; flowing molten thermoplastic material through a first injection point in the first mold and through a long injection nozzle extending from the first mold to the second mold outside of the side walls to a second injection point in the second mold; injecting molten thermoplastic material into the cavity from the first and second injection points which provide plural injection positions on the first and second molds having plural separate flows of molten plastic flowing through the plural injection positions from three dimensions of the cavity for filling a volume of the cavity, wherein each flow of the molten thermoplastic material fills part of the cavity and the molten thermoplastic material from all of the injection positions flow together to fill the entire cavity while the material is entirely in a molten state, wherein the molded object has at least one dimension of more than 80 cm, opening the first and second molds with the side walls moving sideways to facilitate demolding of the molded object; wherein the long injection nozzle remains fixed during the sideways movement of the side walls and the opening movement of the second mold.