[특허]Method of manufacture of a foamed core class “A” article

Method of manufacture of a foamed core class “A” article 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-044/00
출원번호	US-0934131 (2009-03-26)
등록번호	US8048347 (2011-10-17)
국제출원번호	PCT/US2009/038374 (2009-03-26)
§371/§102 date	20101111 (20101111)
국제공개번호	WO09/120850 (2009-10-01)
발명자 / 주소	Mozer, Wilfried Desmith, Brian L.
출원인 / 주소	Delta Engineered Plastics
대리인 / 주소	Brooks Kushman P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 46

초록 ▼

The method of manufacturing an article having a surface, a skin, and a core includes closing a first mold portion on a compressible seal. The seal is disposed between the first and second mold portions. The portions define a pressurizable mold cavity having a spaced apart injection port and a vent. The mold cavity is pressurized at a first pressure greater than atmospheric pressure. Molten plastic and blowing agent are injected form gas cells within the mixture. The gas cells have an internal pressure exceeding the first pressure. After waiting for a first period, the pressurizing gas is vented for a second period at a rate sufficient to rupture the gas cells which form a skin adjacent to the mold cavity wall. The skin defines a core cavity filled with the foamed mixture, which is solidified. The mold portions are separated releasing the article.

대표청구항 ▼

What is claimed is: 1. A method for use in manufacturing an article having a surface, a skin and a core, the method comprising:closing a first mold portion upon a compressible seal disposed between the first mold portion and a second mold portion, the first and second mold portions each having a wall defining a pressurizable mold cavity, the mold cavity having a mold cavity wall, an injection port and a vent;pressurizing the mold cavity using a pressurizing gas at a first pressure greater than atmospheric pressure;injecting an injection comprising a mixture of a molten plastic and a blowing agent into the mold cavity through the injection port;generating a blowing agent gas from the blowing agent to form a plurality of gas cells within the mixture, the plurality of gas cells having an internal pressure less than the first pressure;waiting for a first period;venting the pressurizing gas through the vent for a second period, the first pressure being reduced to a second pressure that is less than the internal pressure of the gas cells in order to permit the plurality of gas cells in the injection that are adjacent to the pressurizing gas to expand;rupturing the plurality gas cells in the injection adjacent to the pressuring gas to form a plurality of ruptured gas cells;forming the skin adjacent to the mold cavity wall using the ruptured cells, the skin defining a core cavity;filling the core cavity with the mixture;solidifying the mixture; andseparating the first mold portion from the second mold portion in order to release the article.

이 특허에 인용된 특허 (46)

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Guergov, Milko G., Gas assisted injection molding with controlled internal melt pressure.
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Foltuz Eugene L. ; Cohan Norman H. ; Gomez Enidio A., Injection molding apparatus with removable hetero-molding tools.
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Guergov Milko G. (615 Washington ; #5 Monroe MI 48161), Method and apparatus for injecting a molten material into a mold cavity.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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연합인증

Method of manufacture of a foamed core class “A” article 원문보기

초록 ▼

대표청구항 ▼

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Method of manufacture of a foamed core class “A” article 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허에 인용된 특허 (46)

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