Patent ID: 6890478
Filing Date: 2005-05-10
Classification: B29C

Abstract:
1. A process for forming a plastic article by gas-assisted plastic injection molding comprising the steps of: providing a mold with a first mold member and a second mold member, and an article defining cavity formed between said first and second mold members; providing a plurality of post members with first ends positioned in said second mold member and in communication with said mold cavity and second ends positioned in a biased frame member; injecting a quantity of plastic material into said mold cavity; injecting a pressurized gas into the plastic material in said mold cavity; opening said mold cavity by moving said second mold member away from said first mold member, thereby forming at least one hollow portions in a predetermined area in said plastic material by said gas; and maintaining the original positions of said first ends of said post members in said mold cavity, at least one of said post members being positioned in said predetermined area, thereby forming at least one solid portions in said molded plastic article within said predetermined area.