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특허 상세정보

Structural foam molding process

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29D-027/00   
미국특허분류(USC) 264/455 ; 264/50 ; 264/51 ; 264/3281
출원번호 US-0058524 (1979-07-18)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 23  인용 특허 : 2

A process is disclosed for molding a foamed thermoplastic article characterized by a foamed core, a non-foamed exterior shell and a surface that reproducibly and faithfully replicates a predetermined portion of the inner surface of the mold in which the article is made, wherein a foamable mixture comprising molten thermoplastic material and blowing agent is introduced through a nozzle into a mold cavity defined by said inner surface of said mold and expands and is rigidified while in said mold cavity.


A process for molding a foamed thermoplastic article characterized by a foamed core, a non-foamed exterior shell, and a surface that faithfully and reproducibly replicates a predetermined portion of the inner surface of the mold which comprises: feeding as a charge a molten mixture of a thermoplastic polymer and a soluble gas foaming agent into a mold maintained at a temperature sufficiently low to cause the outer portion of said mixture to form a self-supporting exterior shell in said mold and at a volume sufficient, in the unfoamed state, to substantia...

이 특허를 인용한 특허 피인용횟수: 23

  1. Donnell ; Jr. Emerson B. (P.O. Box 386 Basking Ridge NJ 07920-0386). Adjustable injection molding apparatus for creating of products within a mold from fluid plastic material. USP1997025599568.
  2. Herrmann Heinz (Stuttgart DEX) Grimminger Albert (Leonberg DEX). Apparatus for the extraction of melt samples from a material which is liquid at an elevated temperature, but solid at am. USP1990114973239.
  3. Chaudhary Bharat I. (Kehl DEX) Eschenlauer Georges (Soufflenheim FRX) Marks Bruce S. (Westerville OH). Closed cell, low density ethylenic polymer foam produced with inorganic halogen-free blowing agents. USP1996095554661.
  4. Marc, Michel. Composite foam product. USP2014058715437.
  5. Paisley Gary V. (Atlanta GA) Altschuler J. George (Montreal CAX) Rommler Josef (Ulm DEX). Foamed thermoplastic resin cork having a natural cork-like appearance and a method of injection molding the cork. USP1982124363849.
  6. Clarke Peter Reginald,GBX. Gas introduction. USP2001096287494.
  7. Gahan Geoffrey D. (Great Missenden GB2). Injection molding apparatus having a sprue holder with an inclined retractable ram. USP1985024498860.
  8. Vismara Mario (Casatenovo ITX). Machine for the production of moulded articles of plastic material, in particular of crash helmets for motorcyclists and. USP1987104698001.
  9. Hunerberg Edward C. (Tecumseh MI). Method and apparatus for injection molding plastic articles having solid exterior surfaces and porous interior cores. USP1984094473516.
  10. Yamaki Hiroshi,JPX ; Matsuura Yoshimasa,JPX ; Kataoka Hiroshi,JPX. Method for injection molding of thermoplastic resins. USP2000116146577.
  11. Moreira, Andre Guerin; Bothe, Marc; Schädler, Volker; Allmendinger, Markus; Sampaio Lopes, Pedro Manuel; Sowart, Bernd; Francis, Timothy; Waβner, Erik; Schade, Christian; Longo, Daniela; Lietz, Siljana; Alstädt, Volker; Sandler, Jan. Method for producing nanoporous molded parts. USP2012068206626.
  12. Yusa, Atsushi; Nomura, Yoshiyuki; Yamada, Atsushi. Method of injection molding thermoplastic resin using supercritical fluid and injection molding apparatus. USP2012058168098.
  13. Shimura, Satoshi; Kawauchi, Hitoshi; Hirano, Hiroyuki. Molding apparatus including screw for molded articles of thermoplastic gas impregnated resin. USP2003116652254.
  14. Hendry, James; Homann, Gregory A.; Turczynski, David. Open mold molding. USP2005056890478.
  15. Pearson, Terrence C.. Plastic expulsion process. USP2004076767487.
  16. Pearson, Terrence C.. Plastic expulsion process for forming hollow tubular products. USP2005106953546.
  17. Homann, Gregory A.; Turczynski, David. Plastic injection molded articles with hollow rib members. USP2005056890477.
  18. Homann, Gregory A.; Hendry, James; Turczynski, David. Plastic injection molding with moveable insert members. USP2005096939504.
  19. Homann, Gregory A.. Plastic injection molding with moveable mold members forming speaker grill. USP2005056899843.
  20. Hendry James W. (Spring Hill FL) Cahan Geoffery D. (Little Kingshill GB2). Process and apparatus for injection moulding and mouldings produced thereby. USP1989044824732.
  21. Baumrucker Ervin J. (Highlands NC). Process and mold for molding foamed plastic articles. USP1984104479914.
  22. Shibuya Takehiro (Yokohama JPX) Nagahara Takashi (Yokohama JPX) Imai Susumu (Zama JPX). Process for molding of a foamed article. USP1990084952365.
  23. Nakamura Hisao (Utsunomiya JPX) Iwano Shoji (Nishikata JPX). Process for producing polyethylene extruded foams. USP1987034649001.