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특허 상세정보

Open mold molding

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29D-022/00   
미국특허분류(USC) 264/572; 425/130
출원번호 US-0250280 (2003-06-20)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 8  인용 특허 : 45
초록

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.

대표
청구항

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...

이 특허에 인용된 특허 (45)

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