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특허 상세정보

Gas assist injection molding apparatus and method with multiple temperature gas supply

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-045/72    B29C-045/76   
미국특허분류(USC) 264/028 ; 264/040.1 ; 264/040.3 ; 264/572 ; 425/130 ; 425/145 ; 425/146 ; 425/155 ; 425/160
출원번호 US-0600119 (1996-02-12)
발명자 / 주소
대리인 / 주소
    Young & Basile, PC
인용정보 피인용 횟수 : 8  인용 특허 : 47
초록

A supply of pressurized gas is separated into a first quantity of pressurized gas at a first temperature and a second quantity of pressurized gas at a second lower temperature. The first and second quantities of gas are injected into molten plastic in an injection mold in a predetermined sequence to form a hollow molded plastic article. A controller independently controls the pressure and time of delivery of the first and second quantities of pressurized gas supplied to the mold. A third quantity of extremely lower temperature gas may also be supplied to...

대표
청구항

[ What is claimed is:] [1.] A gas assisted injection molding apparatus for use with an injection mold, the apparatus comprising:means for injecting molten plastic into an injection mold;a source of injection gas;first means, disposed in fluid communication with the source of injection gas, for delivering a first quantity of injection gas at a first temperature to the injection mold;second means, disposed in fluid communication with the source of injection gas, for delivering a second quantity of gas at a second temperature to the injection mold;means, co...

이 특허에 인용된 특허 (47)

  1. Hendry James W. (Spring Hill FL). Apparatus for compressing a gas. USP1988064750409.
  2. 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.
  3. Hayashi Hiromi (Tokyo JPX) Ichinose Yasuaki (Tokyo JPX) Harada Hiroshi (Kanagawa ; JPX) Kaneishi Akimasa (Osaka JPX). Apparatus for injecting a gas into molten resin in a cavity of an injection molding machine. USP1991105056997.
  4. Johnson Joe L. (Middlefield OH) Seman ; Sr. Richard T. (Newbury OH). Apparatus for producing a fluid-assisted injection molded product. USP1992075127814.
  5. Hendry James W. (Spring Hill FL). Apparatus for the injection molding of thermoplastics. USP1988114781554.
  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. Loren Norman S. (24874 Chalk Farm Rd. Warren MI 48091). Gas assisted injection molding. USP1993045204050.
  9. Baxi Indra R. (Solon OH) Pardy Paul (Windsor CAX). Gas supply sprue bushing for injection molding machines. USP1991095049056.
  10. Baxi Indra R. (Troy MI) Erikson Erik E. (Grosse Pointe Shores MI). Injection molding apparatus. USP1991115066214.
  11. Baxi Indra R. (Troy MI). Injection molding apparatus for making a hollow object. USP1991055015166.
  12. Steinbichler Georg (Rottenmann ATX) Lampl Alfred (Schwertberg ATX). Injection molding process with pressure increasing mechanism. USP1992085141682.
  13. Sayer Matthew E. (Tamworth GB2). Injection moulding apparatus. USP1988044740150.
  14. Loren Norman S. (24874 Chalk Farm Rd. Warren MI 48091). Injection nozzle having a raised land portion. USP1992115162122.
  15. Sayer Matthew E. (Tamworth GB2). Method and apparatus for injection moulding. USP1990054923667.
  16. Kauer Hubert (Warren MI). Method and system for making a hollow-shaped body from molten resin by injection molding. USP1989054830812.
  17. Shah Chandrakant C. (4433 Clarke Troy MI 48098). Method for dual fluid injection molding. USP1994105354523.
  18. Baxi Indra R. (Solon OH) Johnson Thomas W. (Middlefield OH). Method for injection molding. USP1992035096655.
  19. Friederich ; Ernst. Method for injection molding of hollow shaped bodies from thermoplastic resins. USP1978074101617.
  20. Hendry James W. (Brooksville FL). Method for injection molding plastic article with gas-assistance. USP1991075028377.
  21. Hendry James W. (Spring Hill FL). Method for the injection molding of plastic articles using fluid pressure. USP1989084855094.
  22. Hendry James W. (Brooksville FL). Method for the use of gas assistance in the molding of plastic articles. USP1990084948547.
  23. Hendry James W. (Brooksville FL). Method for the use of gas assistance in the molding of plastic articles. USP1991125069858.
  24. Hendry James W. (Brooksville FL). Method for the use of gas assistance in the molding of plastic articles to enhance surface quality. USP1992055110533.
  25. Hendry James W. (Brooksville FL). Method of and apparatus for injection molding with pressurized fluid assist. USP1990074943407.
  26. Loren Norman S. (Warren MI). Method of and apparatus for injection molding with pressurized-fluid assist. USP1990074942006.
  27. Hendry James W. (Brooksville FL). Method of injecting molding. USP1992055114660.
  28. Eckardt Helmut (Meinerzhagen DEX) Ehritt Jrgen (Hilchenbach-Msen DEX). Method of injection molding articles of thermoplastic materials. USP1991095047183.
  29. Hendry James W. (Brooksville FL). Method of injection molding utilizing pressurized fluid source within a chamber in a mold. USP1992085137680.
  30. Loren Norman S. (Warren MI). Method of injection molding with pressurized-fluid assist. USP1991125069859.
  31. Hendry James W. (Spring Hill FL). Method of injection molding with pressurized-fluid assist and variable-volume reservoir. USP1991075032345.
  32. Yamazaki Kunio (Takatsuki JPX) Watanabe Tetsuzi (Toyonaka JPX). Method of injection moulding. USP1990054923666.
  33. Hanning ; Robert. Method of making thermoplastic articles with porous cores. USP1978094115491.
  34. Eckardt Helmut (Meinerzhagen DEX) Ehritt Jrgen (Hilchenbach-Msen DEX). Method of manufacturing multiple-layer molded articles of thermoplastic material. USP1992035093053.
  35. Hendry James W. (Spring Hill FL). Method of molding thermoplastic material. USP1990074944910.
  36. Baxi Indra R. (Solon OH) Parr Alan (Ontario CAX). Miniaturized for gas-assisted injection molding. USP1992015080570.
  37. Shah Chandrakant C. (4433 Clarke Troy MI 48098) Survjeet Verman (32 Graham Place Lambeth ; Ontario CAX). Nozzle apparatus for gas assisted injection molding. USP1993055208046.
  38. Baxi Indra R. (Solon OH) Johnson Tom W. (Hunting Valley OH). Plastic injection molding nozzle with gas assist. USP1992095151278.
  39. Baxi Indra R. (Solon OH). Pressurization control unit for a gas-assisted injection molding machine. USP1993035198240.
  40. Hendry James W. (Spring Hill FL) Cahan Geoffery D. (Little Kingshill GB2). Process and apparatus for injection moulding and mouldings produced thereby. USP1989044824732.
  41. Hettinga Siebolt (2123 NW. 111th St. Des Moines IA 50325). Process for injection molding a hollow plastic article. USP1992085139714.
  42. Hendry James W. (Brooksville FL). Process for injection molding and hollow plastic article produced thereby. USP1992035098637.
  43. Baxi Indra R. (Troy MI). Process of injection molding with pressurized gas assist. USP1992055112563.
  44. Baxi Indra R. (Troy MI). Process of insection molding with pressurized gas assist. USP1990064935191.
  45. Hunerberg Edward C. (Tecumseh MI) Daly Neil (Jackson MI). Sequential method of operation of combination plastic and gas injection nozzle assembly. USP1992085135703.
  46. Kauer Hubert (Warren MI). System for making a hollow-shaped body from molten resin by injection molding. USP1990044913644.
  47. Hendry James W. (Spring Hill FL). Variable volume reservoir and method for its use. USP1992075131226.