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특허 상세정보

Method for the use of gas assistance in the molding of plastic articles

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-045/00    B29C-045/38    B29D-022/00   
미국특허분류(USC) 264/572 ; 264/155 ; 264/161 ; 264/3288
출원번호 US-0552871 (1990-07-16)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 18  인용 특허 : 0
초록

A method of gas-assisted injection molding in which a first charge of pressurized gas is injected into the mold, but not into the article-defining cavity. The gas charge is of a predetermined pressure sufficient to assist in filling out the article-defining cavity with resin and promoting surface quality. A second charge of pressurized gas may be introduced into the mold at a location remote from a first resin flow path by which the resin entered the article-defining cavity. The second charge of gas is of a pressure and quantity sufficient to enter the a...

대표
청구항

The method for injection molding of a plastic article in an injection molding system including a mold having an injection aperture, an article-defining cavity and a resin reservoir in communication with the cavity, the method comprising the steps of: injecting an amount of molten plastic resin sufficient for the preparation of the plastic article through the injection aperture and along a first resin flow path which extends from the injection aperture to the article-defining cavity and along a second resin flow path which extends from the article-definin...

이 특허를 인용한 특허 피인용횟수: 18

  1. Yamamoto, Takeshi; Kagawa, Mamoru; Yamamoto, Hiroaki. Automotive trim part having a bi-component show surface. USP200312D484080.
  2. Gulisano Salvatore J. ; Mazzola Michael ; Ivy Stephen C. ; Johnson Rhys,AUX. Door trim panel assembly and plastic inner panel for use therein. USP2000096119406.
  3. Blankenburg Karl. Gas assist injection molding apparatus and method with multiple temperature gas supply. USP1998035728325.
  4. Moldovanyi Jay F. (Brecksville OH). Gas assisted injection molding apparatus utilizing sleeve and pin arrangement. USP199712RE35705.
  5. Heuchert John Michael ; Hendry James Watson. Gas assisted injection molding combining internal and external gas pressures. USP1998025716560.
  6. Winget Larry J. ; Porter Randolph S. ; Murphy John F.. Hollow plastic article formed by a gas-assisted injection molding system. USP2001116322865.
  7. Tatham Glenn L.. Method and apparatus for plastic injection molding flow control. USP1998125849236.
  8. De'ath Roderick Michael,GBX. Method and apparatus for preventing sink marks in the injection moulding of thermoplastic polymers. USP2000066071463.
  9. James Watson Hendry ; John Michael Heuchert. Method for fluid compression of injection molded plastic material. USP2002066403014.
  10. Driessen Marcellis H. J.,NLX ; Lock Willem,NLX. Method for injection-moulding a hollow product using a pressure variation between two gas volumes. USP1999125997799.
  11. Kurihara Tsuneo (Sayama JPX) Kusaka Katsushige (Sayama JPX) Ichikawa Teruo (Sayama JPX) Tanaka Hiromi (Sayama JPX) Higashi Toshiyuki (Sayama JPX). Molding apparatus for producing synthetic resin molded product. USP1997035612067.
  12. Darius J. Preisler ; Jason T. Murar ; Bradley Kusky. Motor vehicle trim assembly including a hollow plastic panel for a side impact inflatable air bag system. USP2002046364346.
  13. Hendry, James; Homann, Gregory A.; Turczynski, David. Open mold molding. USP2005056890478.
  14. Homann, Gregory A.; Turczynski, David. Plastic injection molded articles with hollow rib members. USP2005056890477.
  15. Homann, Gregory A.; Hendry, James; Turczynski, David. Plastic injection molding with moveable insert members. USP2005096939504.
  16. Homann, Gregory A.. Plastic injection molding with moveable mold members forming speaker grill. USP2005056899843.
  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.