Patents Assigned to Sanwakako Co., Ltd.
  • Patent number: 6572808
    Abstract: A laminated molding product having a surface member with superior property made of urethane foam and manufacturing process thereof are provided. The laminated molding product includes a thermoplastic resin base and an ether type urethane foam (131) mainly made of polyether polyol integrally attached by injection compression molding or injection molding under pressure of 50 kg/cm2 according to average pressure relative to project area of a molding cavity. The urethane foam may alternatively be ester/ether type urethane foam mainly made of polyester polyol and polyether polyol.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: June 3, 2003
    Assignees: Idemitsu Petrochemical Co., Ltd., Sanwakako Co., Ltd.
    Inventors: Yoshiaki Saito, Terunobu Fukushima
  • Patent number: 6454984
    Abstract: A molding die 1 for molding a laminated molding having a molding body with compressible surface members 23 and 24 partially laminated thereonto, where a flow-regulating portion for regulating flow of molten resin flowing toward the surface members 23 and 24 is provided to a die body 10 to regulate the flow of the molten resin flowing on the same plane as the surface members 23 and 24 toward the surface members 23 and 24. Accordingly, since resin lap at an peripheral end portion of the surface members 23 and 24, and position shift of the surface members 23 and 24 by the flow of the resin, laminated molding having good quality and appearance can be obtained.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: September 24, 2002
    Assignees: Idemitsu Petrochemical Co., Ltd., Sanwakako Co., Ltd.
    Inventors: Yoshiaki Saito, Tomokazu Abe, Terunobu Fukushima
  • Patent number: 6439871
    Abstract: A molding die for shaping a laminated molding including a molding body and a compressible surface member laminated thereonto has centering pins for determining a position of the surface member protrudable and retractable relative to a cavity inside a die body. Accordingly, since the surface member can be accurately and easily positioned and held, position shift of the surface member can be securely prevented. Further, by sinking the centering pins before molten resin is solidified, influence by the centering pins can be eliminated.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: August 27, 2002
    Assignees: Idemitsu Petrochemical Co., Ltd., Sanwakako Co., Ltd.
    Inventors: Yoshiaki Saito, Tomokazu Abe, Terunobu Fukushima