[특허]Injection molding apparatus for making a hollow object

[미국특허] Injection molding apparatus for making a hollow object 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-049/78
출원번호	US-0266476 (1988-11-02)
발명자 / 주소	Baxi Indra R. (Troy MI)
출원인 / 주소	Encore Molding Systems, Inc. (East Detroit MI 02)
인용정보	피인용 횟수 : 14 인용 특허 : 6

초록 ▼

An apparatus for making a plastic injection molded part with a smooth surface or skin and a hollow core wherein thermoplastic material is injected as a molten stream into the mold cavity through a sprue bushing fixed in the mold. Simultaneously, an unmeasured quantity of inert gas is introduced through an adapter into the molten stream at the sprue bushing substantially coaxially with the melt stream and at a pressure sufficient to penetrate the thermoplastic material to form a gas cavity in the molten material in the mold. For retrofitting an existing mold, an adapter can be added to the existing sprue bushing. During plastic injection and cooling in the mold the gas is maintained at a high pressure, preset, constant and adequate to maintain the plastic against the mold surface until it is self-supporting. The gas is exhausted from the mold, back through the sprue bushing and adapter, before the mold is opened. Adequate preset high pressure is maintained at the gas supply by a large cylinder having a positive displacement member therein that is controlled by a pressure sensor in the gas pressure line to the mold to maintain preset adequate gas pressure within the cavity.

대표청구항 ▼

In a gas delivery apparatus for use in gas assisted injection molding of a plastic part, said part having an outer shell and a hollow core, and wherein molten plastic is injected into a mold and gas is introduced into said molten plastic at a preselected pressure higher than injection pressure of said molten plastic and wherein said preselected gas pressure is maintained in said core until said shell cools sufficiently to be self supporting, the improvement wherein said gas delivery apparatus comprises gas providing means for providing a first quantity of gas at said preselected pressure, said first quantity being greater than that required to make said part, a storage chamber having a volume sufficient to store said first quantity of gas at said preselected pressure, means for detecting deviations in gas pressure from said preselected pressure, and means for automatically decreasing said volume of said chamber in response to detected gas pressure variations after gas introduction is initiated to make up for gas depleted from said chamber and thereby maintain said preselected gas pressure substantially constant until plastic injection has ceased and said shell has become self-supporting, means for interrupting gas introduction into said plastic and means for venting said core to decompress said shell.

이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

Hendry James W. (Spring Hill FL), Apparatus for the injection molding of thermoplastics.
상세보기
Gahan Geoffrey D. (Great Missenden GB2), Injection molding apparatus having a sprue holder with an inclined retractable ram.
상세보기
Sayer Matthew E. (Tamworth GB2), Injection moulding apparatus.
상세보기
Friederich ; Ernst, Method for injection molding of hollow shaped bodies from thermoplastic resins.
상세보기
Hendry James W. (Englewood TN), Method of making a twin-wall internally corrugated plastic structural part with a smooth non-cellular skin.
상세보기
Olabisi Olagoke (Plainfield NJ), Process for the molding of plastic structural web and the resulting articles.
상세보기

이 특허를 인용한 특허 (14) 인용/피인용 타임라인 분석

Blankenburg Karl, Gas assist injection molding apparatus and method with multiple temperature gas supply.
상세보기
Daniels Vernon Arthur, Gas assisted injection molding system.
상세보기
Emmer, Gerard; Evrard, Alain, Method for making, by blow moulding, plastic hollow bodies, device and installation therefor.
상세보기
Splain, William D.; Peota, Robert D.; Hennen, Alexandre; Cameron, Allan; Ryan, Mark T.; Pruitt, Jr., David L., Method of assembling a shopping cart.
상세보기
DeCost, Norman, Method of molding a cart using molding processes.
상세보기
Pruitt, Jr., David L.; Ryan, Mark T.; Shell, Charles E.; Peota, Robert D.; Crow, Kenneth R.; Sayer, Matthew E., Method of molding a shopping cart.
상세보기
Nelson William A. (New Baltimore MI), Nozzle for gas-assisted injection molding.
상세보기
Newhouse Thomas J., One piece molded seating structure.
상세보기
Hirose Toshio,JPX, Rocker panel construction.
상세보기
Splain,William D.; Peota,Robert D.; Hennen,Alexandre; Cameron,Allan; Ryan,Mark T.; Pruitt, Jr.,David L., Shopping cart.
상세보기
Splain, William D.; Peota, Robert D.; Hennen, Alexandre; Cameron, Allan; Ryan, Mark T.; Pruitt, Jr., David L., Shopping cart base.
상세보기
Peota, Robert D.; Splain, William D.; Tharp, Robert D., Shopping cart handle.
상세보기
Peota,Robert D.; Splain,William D.; Tharp,Robert D., Shopping cart seat member.
상세보기
Peota,Robert D.; Splain,William D.; Tharp,Robert D., Shopping cart support assembly.
상세보기

활용도 분석정보

상세보기

다운로드

내보내기

활용도 Top5 특허

해당 특허가 속한 카테고리에서 활용도가 높은 상위 5개 콘텐츠를 보여줍니다.
더보기 버튼을 클릭하시면 더 많은 관련자료를 살펴볼 수 있습니다.

내보내기 메뉴

내보내기 구분

파일저장
인쇄
메일전송

구성항목

기본정보
상세정보

관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC

저장형식

Text(ASCII format)
Excel format
PIAS분석(.xls)

메일정보

받는사람 (필수): @
보내는사람 (선택): @
제목
내용: KISTI 검색결과 이메일 서비스

안내

총 건의 자료가 검색되었습니다.

다운받으실 자료의 인덱스를 입력하세요. (1-10,000)

검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다.

데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요)

다운로드 파일은 UTF-8 형태로 저장됩니다.
파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오.

Text(ASCII format)
Excel format

AI-Helper ※ AI-Helper는 을 사용합니다.

AI-Helper

안녕하세요, AI-Helper입니다. 좌측 "선택된 텍스트"에서 텍스트를 선택하여 요약, 번역, 용어설명을 실행하세요.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.

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

연합인증

[미국특허] Injection molding apparatus for making a hollow object 원문보기