Patents Assigned to Sanko Sogyo Co., Ltd.
  • Method for producing a molded foam article with an integral skin
    Patent number: 5665285
    Abstract: A molded foam article with an integral skin is produced by blow-molding a parison in a cavity of a metal mold to form a hollow member, filling the hollow member with pre-expanded thermoplastic resin besides before cooling and solidification of the hollow member, and heating the pre-expanded beads to cause the beads to expand further and fuse together. A filler for the pre-expanded thermoplastic resin beads is provided with a cutter for making a hole in the hollow member before introducing the resin beads into the hollow member.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: September 9, 1997
    Assignees: Mitsubishi Yuka Badische Co., Ltd., Sanko Sogyo Co., Ltd., Aron Kasei Co., Ltd.
    Inventors: Kazuhide Hattori, Hiroyuki Yamaji, Yoshikazu Hatakeyama, Yoshiyuki Shida, Atsushi Tamura, Takumi Kitaoka, Takashi Kohama
  • Process for producing expanded plastics with skin
    Patent number: 5366674
    Abstract: A process for producing expanded plastic with a skin and a molding apparatus therefor, the process including blowing a parison being held in a closed blow mold to obtain a hollow article, filling the hollow article with thermoplastic preexpanded resin beads before the hollow article is cooled to solidify, heating and fusing said beads, and cooling the expanded plastic. A hollow article and an expanded body are completely fused together, and improved productivity is obtained.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: November 22, 1994
    Assignees: Aronkasei Co., Ltd., Mitsubishi Yuka Badische Co., Ltd., Sanko Sogyo Co., Ltd.
    Inventors: Kazuhide Hattori, Hiroyuki Yamaji, Yoshikazu Hatakeyama, Yoshiyuki Shida, Atushi Tamura, Takumi Kitaoka, Takashi Kohama