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특허 상세정보

Method for injection molding of plastic article

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-045/00   
미국특허분류(USC) 264/572 ; 425/130
출원번호 US-0492589 (1995-06-21)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 18  인용 특허 : 5
초록

A method and system for injection molding plastic articles which utilize a spill cavity whose volume varies. In one embodiment, the volume varies during introduction of pressurized gas into a mold cavity flow coupled to the spill cavity. In another embodiment, the volume of the spill cavity varies during a plastic injection which fills the mold cavity. A piston reciprocally mounted within a cylinder defines the variable volume of the spill cavity. In one embodiment, a pneumatic control circuit controls the pressure on a lower surface of the piston to the...

대표
청구항

In a method for injection molding a hollow plastic article comprising the steps of: injecting a quantity of fluid plastic into a mold cavity having a shape defining at least a portion of the article; displacing a portion of the plastic from the mold cavity into a spill cavity having a volume flow coupled to the mold cavity by introduction of a charge of pressurized gas into the mold cavity; permitting the injected plastic to solidify; venting the gas from the mold cavity; and removing the plastic article from the mold, the improvement comprising: allowin...

이 특허를 인용한 특허 피인용횟수: 18

  1. Gosdin Michael,DEX. Apparatus for producing hollow plastic objects with pressurized gas injection after overflow cut-off. USP1999075928677.
  2. Rodenburgh Case Cornelis ; Coulter John Paul ; Oyeleye Olagunju Oladipo. Apparatuses and methods for controlling the fill of tooling cavities. USP1999126001296.
  3. Hutton Norman J.. Collection container assembly. USP2001046221307.
  4. Wieder,Klaus A.. Ejector pin and method. USP2006117131625.
  5. Kamiya,Kouji; Kondoh,Toshiaki; Hazama,Syuuichi; Tanaka,Takanori; Fujiwara,Kosyun. Method for molding resin member and injection molding apparatus. USP2007077244117.
  6. Eckardt Helmut,DEX ; Ehritt Jurgen,DEX ; Seuthe Alfons,DEX ; Gosdin Michael,DEX. Method for producing plastic objects. USP1998065759459.
  7. Murphy John F. ; Porter Randolph S.. Mold for use in a gas-assisted injection molding system and adjustable overflow pin assembly for use therein. USP1999025869105.
  8. Murphy John F.. Mold for use in a gas-assisted injection molding system and ejector pin subsystem including a blocking pin assembly for use therein. USP2000036042356.
  9. Murphy John F. ; Porter Randolph S.. Mold for use in a gas-assisted injection molding system and ejector pin subsystem including a split pin for use therein. USP2000036042355.
  10. Murphy John F.. Mold for use in a gas-assisted injection molding system and runner shut-off subsystem for use therein. USP2000056062842.
  11. Wieder, Klaus A.. Mold vent and method. USP2004126827569.
  12. Hendry, James; Homann, Gregory A.; Turczynski, David. Open mold molding. USP2005056890478.
  13. Homann, Gregory A.; Turczynski, David. Plastic injection molded articles with hollow rib members. USP2005056890477.
  14. Homann, Gregory A.; Hendry, James; Turczynski, David. Plastic injection molding with moveable insert members. USP2005096939504.
  15. Homann, Gregory A.. Plastic injection molding with moveable mold members forming speaker grill. USP2005056899843.
  16. Matsumoto Masahito,JPX ; Funakoshi Satoru,JPX ; Matsubara Shigeyoshi,JPX. Process for producing thermoplastic resin hollow molded article. USP2000116146579.
  17. Gotterbauer Klaus,DEX. Process of and an apparatus for injection molding hollow-blown plastic bodies. USP1998115837186.
  18. Gotterbauer Klaus,DEX. Process of and an apparatus for injection molding hollow-blown plastic bodies. USP1998065759479.