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특허 상세정보

Method for injection molding utilizing a variable volume spill area within an article-defining mold cavity and article p

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-045/00    B29D-022/00   
미국특허분류(USC) 264/572
출원번호 US-0883867 (1997-06-27)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Brooks & Kushman P.C.
인용정보 피인용 횟수 : 7  인용 특허 : 11
초록

A method and system for injection molding plastic articles which utilize a spill area whose volume varies within an article-defining mold cavity. In one embodiment, the volume increases during introduction of pressurized gas into the mold cavity. In another embodiment, the volume of the spill area varies during a plastic injection which fills the mold cavity. A core reciprocally mounted within the mold cavity partially defines the variable volume of the spill area. An air spring is utilized to control pressure on the core which counters the pressure of t...

대표
청구항

[ What is claimed is:] [1.] In a method for injection molding a hollow plastic article in a mold having first and second mold halves which provide a mold cavity, the method comprising the steps of:injecting a quantity of fluid plastic into the mold cavity having a shape defining at least a portion of the article in a closed position of the mold;displacing a portion of the plastic from the mold cavity into a spill area by introduction of a charge of pressurized gas into the mold cavity;permitting the injected plastic to solidify;venting the gas from the m...

이 특허에 인용된 특허 (11)

  1. Shah Suresh D. (Troy MI). Injection molding apparatus and method having in-cavity control of plastics and gas flow rates. USP1994045304341.
  2. Sayer Matthew E. (Tamworth GB2). Injection moulding apparatus. USP1988044740150.
  3. Friederich ; Ernst. Method for injection molding of hollow shaped bodies from thermoplastic resins. USP1978074101617.
  4. Prusak John J. (Indianapolis IN) Patel Bhupendra P. (Indianapolis IN). Method for molding an article. USP1983114414167.
  5. Komiyama Chiaki (Aichi JPX) Nagano Akiyoshi (Aichi JPX) Nada Sadao (Inazawa JPX) Mukai Hiroshi (Hashima JPX) Fukamachi Hidetaka (Komaki JPX) Narukawa Hirohisa (Inazawa JPX) Yoshida Akihiro (Inazawa J. Method for molding hollow shaped bodies. USP1993115262105.
  6. Yasuike ; Akio ; Kataoka ; Hiroshi ; Toyouchi ; Kaoru. Method for producing foamed moldings from synthetic resin materials. USP1978124129635.
  7. Fries Bernd (Weissenburg DEX). Method of injection molding hollow articles. USP1993105252287.
  8. Loren Norman S. (Warren MI). Method of injection molding with pressurized-fluid assist. USP1991125069859.
  9. Kaneishi Akimasa (Hiratsuka JPX) Kiboshi Sinji (Hiratsuka JPX) Mio Isamu (Hiratsuka JPX). Mold apparatus for process for injection molding. USP1997065639417.
  10. Hendry James W. (Brooksville FL). Process for injection molding and hollow plastic article produced thereby. USP1992035098637.
  11. Olabisi Olagoke (Plainfield NJ). Process for the molding of plastic structural web and the resulting articles. USP1979014136220.