Patents by Inventor Yoshirou Oowada

Yoshirou Oowada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Resin composition for shell mold and resin coated sand
    Patent number: 7928151
    Abstract: A resin composition for a shell mold which reduces smoke generation upon molding of a casting mold and maintains a crumbility and a casting mold strength of a phenolic resin, and resin coated sand by the use thereof are provided. The resin composition for the shell mold includes the phenolic resin and an aromatic condensed phosphate ester. The phenolic resin is used as a binder of the resin coated sand used for producing a main mold and a core for shell mold casting of cast iron, cast steel, aluminum, and the like. The aromatic condensed phosphate ester is very effective as a crumbling agent for improving the crumbility of the casting mold after casting.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: April 19, 2011
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Daiki Oniyanagi, Masaru Wada, Yoshirou Oowada, Tetsurou Saikawa
  • RESIN COMPOSITION FOR SHELL MOLD AND RESIN COATED SAND
    Publication number: 20090093567
    Abstract: A resin composition for a shell mold which reduces smoke generation upon molding of a casting mold and maintains a crumbility and a casting mold strength of a phenolic resin, and resin coated sand by the use thereof are provided. The resin composition for the shell mold includes the phenolic resin and an aromatic condensed phosphate ester. The phenolic resin is used as a binder of the resin coated sand used for producing a main mold and a core for shell mold casting of cast iron, cast steel, aluminum, and the like. The aromatic condensed phosphate ester is very effective as a crumbling agent for improving the crumbility of the casting mold after casting.
    Type: Application
    Filed: December 11, 2006
    Publication date: April 9, 2009
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Daiki Oniyanagi, Masaru Wada, Yoshirou Oowada, Tetsurou Saikawa