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특허 상세정보

Apparatus for making thermoplastic articles with porous cores and less porous or nonporous skins

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29D-027/00   
미국특허분류(USC) 425/543 ; 264/DIG ; 83 ; 425/812 ; 425/817R
출원번호 US-0599055 (1975-07-25)
발명자 / 주소
인용정보 피인용 횟수 : 30  인용 특허 : 0
초록

Thermoplastic articles with highly porous cores and less porous or nonporous skins are injection-molded with the aid of a nozzle having a flow divider disposed upstream of its sprue for splitting the oncoming plastic mass into a homogeneous outer stream and an inner stream admixed with a foaming agent, the two streams merging inside the gate of a mold cavity. The foaming agent enters through a central channel which may be provided with one or more ducts alternately usable to introduce pressure fluid and coolant into the cavity lined with coalescing layer...

대표
청구항

An apparatus for making thermoplastic articles with a highly porous part integrally adjoining a part of low to zero porosity, comprising: a mold having a cavity provided with a gate; a nozzle having a sprue communicating with said gate and an entrance port remote from said sprue, said nozzle being provided with a ring space between said port and said sprue and and entrance port remote from said sprue; injection means connected to said port for introducing a flowable thermoplastic material through said sprue and gate into said cavity; flow-dividing means ...

이 특허를 인용한 특허 피인용횟수: 30

  1. Moldovanyi Jay F. (Brecksville OH). Gas assisted injection molding apparatus utilizing sleeve and pin arrangement. USP199712RE35705.
  2. Erikson Jon R.. Gas nozzle assembly for a gas assisted injection molding system. USP1999085939103.
  3. Erikson Jon R.. Gas nozzle for a gas assisted injection molding system. USP1998105820889.
  4. Erikson Jon R.. Gas nozzle for a gas assisted injection molding system. USP1999065908641.
  5. Deskevich, Adam Daniel; Van Hekken, Hendrik Richard; Wolfe, Richard A.. Gas-assisted co-injection molded chair. USP2014038663514.
  6. Haverty David G.. Manufacturing composite parts with integral porous components. USP1999115989473.
  7. Hunerberg Edward C. (Tecumseh MI). Method and apparatus for injection molding plastic articles having solid exterior surfaces and porous interior cores. USP1984094473516.
  8. Sayer Matthew E. (Tamworth GB2). Method and apparatus for injection moulding. USP1990054923667.
  9. Kauer Hubert (Warren MI). Method and system for making a hollow-shaped body from molten resin by injection molding. USP1989054830812.
  10. Wallace Clarence W. (Pittsfield MA) Koenig Howard A. (Medina OH). Method for injection molding articles wherein additives are added in selective portions. USP1981034255367.
  11. Friederich ; Ernst. Method for injection molding of hollow shaped bodies from thermoplastic resins. USP1978074101617.
  12. Yasuike ; Akio ; Kataoka ; Hiroshi ; Toyouchi ; Kaoru. Method for producing foamed moldings from synthetic resin materials. USP1978124129635.
  13. Miller John C. (Piscataway NJ) Burnett Archibald L. (Warren NJ) Scarola Leonard S. (Union NJ). Method for the extrusion of thermoplastic material composites. USP1981114302409.
  14. Hendry James W. (Spring Hill FL). Method for the injection molding of plastic articles using fluid pressure. USP1989084855094.
  15. Hendry James W. (Brooksville FL). Method of and apparatus for injection molding with pressurized fluid assist. USP1990074943407.
  16. Hendry James W. (Spring Hill FL). Method of injection molding with pressurized-fluid assist and variable-volume reservoir. USP1991075032345.
  17. Yamazaki Kunio (Takatsuki JPX) Watanabe Tetsuzi (Toyonaka JPX). Method of injection moulding. USP1990054923666.
  18. Winget Larry J. ; Murphy John F.. Mold for use in a gas-assisted injection molding system and gas pin assembly for use therein. USP2000046053720.
  19. Hendry, James; Homann, Gregory A.; Turczynski, David. Open mold molding. USP2005056890478.
  20. Pearson, Terrence C.. Plastic expulsion process. USP2004076767487.
  21. Pearson, Terrence C.. Plastic expulsion process for forming hollow tubular products. USP2005106953546.
  22. Homann, Gregory A.; Turczynski, David. Plastic injection molded articles with hollow rib members. USP2005056890477.
  23. Homann, Gregory A.; Hendry, James; Turczynski, David. Plastic injection molding with moveable insert members. USP2005096939504.
  24. Homann, Gregory A.. Plastic injection molding with moveable mold members forming speaker grill. USP2005056899843.
  25. Muller John (Englewood TN). Pour hole lock system. USP1988114784366.
  26. Hendry James W. (Spring Hill FL) Cahan Geoffery D. (Little Kingshill GB2). Process and apparatus for injection moulding and mouldings produced thereby. USP1989044824732.
  27. Ponzielli Giuseppe (Milan ITX). Process for manufacturing articles of foamed thermoplastic material and article produced thereby. USP1984034435523.
  28. Kataoka Hiroshi (Tokyo JPX). Process for producing moldings. USP1979024140672.
  29. Baxi Indra R. (Troy MI). Process of insection molding with pressurized gas assist. USP1990064935191.
  30. Kauer Hubert (Warren MI). System for making a hollow-shaped body from molten resin by injection molding. USP1990044913644.