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특허 상세정보

Process for gas assisted and water assisted injection molding

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29D-022/00   
미국특허분류(USC) 264/570; 264/572
출원번호 US-0435088 (2003-05-09)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 8  인용 특허 : 23
초록

A liquid and gas assisted injection molding apparatus comprising a source of liquid coolant, a source of compressed gas, a source of heated viscous plastic, a mold cavity means for controllably injecting said plastic into said cavity, means for controllably injecting said compressed gas into said cavity, means for controllably injecting said liquid coolant into said cavity, and means for selectively controlling the injection of said plastic, gas and liquid coolant.

대표
청구항

1. A method of injection molding plastic parts comprising:injecting viscous plastic into a fluid-tight mold cavity; injecting water through an inlet into said mold cavity to lower the temperature of said viscous plastic; and evacuating said water through said inlet. 2. The method of claim 1 further comprising:injecting compressed gas to assist in evacuating said water. 3. The method of claim 1 further comprising the evacuation of substantially all of said water in liquid form.4. A method injection molding plastic parts comprising the steps of:injecting v...

이 특허에 인용된 특허 (23)

  1. Nelson William A. (New Baltimore MI) Shemanski Joseph (Shelby Township ; Oceana County MI). Apparatus for gas assisted injection molding having precise control of injection and holding pressure with stepped holdi. USP1994035295800.
  2. Jaroschek Christoph (Herbolzheim DEX). Apparatus for the injection molding of fluid-filled plastic bodies. USP1995065423667.
  3. Jaroschek Christoph (Herbolzheim DEX). Apparatus for the injection molding of fluid-filled plastic bodies. USP1992025090886.
  4. Hendry James W. (Spring Hill FL). Apparatus for the injection molding of thermoplastics. USP1988114781554.
  5. Baxi Indra R. (Solon OH). Apparatus having an in-the-mold gas injection pin. USP1993035198238.
  6. Loren Norman S. (24874 Chalk Farm Rd. Warren MI 48091). Gas assisted injection molding. USP1991085039463.
  7. Loren Norman S. (24874 Chalk Farm Rd. Warren MI 48091). Gas assisted injection molding. USP1992065118455.
  8. Schneider David R. (Grand Rapids MI) Russell Robert W. (Kentwood MI) Sorola Brett S. (Bay City MI). Gas-assisted injection molding apparatus. USP1994025284429.
  9. Johnson Joe L. (Middlefield OH). Injection molding nozzle. USP1990034905901.
  10. Steinbichler Georg (Rottenmann ATX) Lampl Alfred (Schwertberg ATX). Injection molding process with pressure increasing mechanism. USP1992085141682.
  11. Sayer Matthew E. (Tamworth GB2). Injection moulding apparatus. USP1988044740150.
  12. Horikoshi Maki,JPX ; Tanaka Yuji,JPX ; Nishiura Keiji,JPX. Injection-molded hollow article, hollow injection molding method and metal mold therefor. USP1998125849377.
  13. Nelson William A. (New Baltimore MI). Method and apparatus for gas assisted injection molding. USP1993045200127.
  14. Hendry James W. (Spring Hill FL). Method for the injection molding of plastic articles using fluid pressure. USP1989084855094.
  15. Shah Chandrakant S. (4433 Clarke Troy MI 48098). Method of and apparatus for dual fluid injection molding. USP1996045505891.
  16. Hendry James W. (Brooksville FL). Method of and apparatus for injection molding with pressurized fluid assist. USP1990074943407.
  17. Eckardt Helmut (Meinerzhagen DEX) Ehritt Jrgen (Hilchenbach-Msen DEX). Method of injection molding articles of thermoplastic materials. USP1991095047183.
  18. Hendry James W. (Spring Hill FL). Method of injection molding with pressurized-fluid assist and variable-volume reservoir. USP1991075032345.
  19. Baxi Indra R. (Solon OH) Johnson Tom W. (Hunting Valley OH). Plastic injection molding nozzle with gas assist. USP1992095151278.
  20. Thomas, Ronald. Process for gas assisted and water assisted injection molding. USP2003066579489.
  21. Jaroschek Christoph (Herbolzheim DEX). Process for the injection molding of fluid-filled plastic bodies. USP1993045204051.
  22. Shah Suresh D. (Troy MI). Pulsating gas-assisted injection molding method and apparatus. USP1996015482669.
  23. Hendry James W. (Spring Hill FL). Variable volume reservoir and method for its use. USP1992075131226.