|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 45|
A method and system for producing thin walled plastic products with hollow rib members using gas-assisted plastic injection molding. The mold is allowed to open a predetermined distance as the gas is injected into the plastic material in the mold cavity. A plurality of post members, such as ejector pins, are located on a biased ejector frame and maintain their positions relative to the mold cavity in order to form solid portions or areas in the molded part.
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 mate...