Patents by Inventor Tomohiro TAKAMA

Tomohiro TAKAMA 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).

  • Publication number: 20200306822
    Abstract: Provided are: a coated sand having improved fluidity and being capable of improving a filling rate of a casting mold to be obtained; and a coated sand for advantageously manufacturing a casting mold having excellent strength, which coated sand provides a casting mold with good mold-releasability and collapsibility, gives cast products a favorable casting surface, and effectively improves sand adhesion on cast products. The coated sand is formed as a dry granular material having fluidity at room temperature, in which the surface of a refractory aggregate is coated with a solid layer of a water-soluble inorganic binder, and spherical particles of silicone resin having binder-repellency exist on the surface of the binder layer, or form a layer on the surface of the binder layer, a part of the spherical particles being not covered with the water-soluble inorganic binder and being exposed.
    Type: Application
    Filed: June 5, 2020
    Publication date: October 1, 2020
    Applicant: ASAHI YUKIZAI CORPORATION
    Inventors: Tomohiro TAKAMA, Tetsuya URA
  • Publication number: 20200306821
    Abstract: Provided are: a mold material having improved fluidity and being capable of improving a filling rate of a forming mold during formation of a casting mold; and a mold material that gives cast products a favorable casting surface, effectively improves sand adhesion on cast products, and advantageously provides a casting mold having excellent strength. The mold material is formed as a coated sand in a wet state with spherical particles of silicone resin having binder repellency existing on its surface, by at least mixing a water-soluble inorganic binder in the liquid state having a viscosity of not more than 1000 cP, and the spherical particles of silicone resin, with a refractory aggregate.
    Type: Application
    Filed: June 5, 2020
    Publication date: October 1, 2020
    Applicant: ASAHI YUKIZAI CORPORATION
    Inventors: Tomohiro TAKAMA, Tetsuya URA
  • Publication number: 20140187667
    Abstract: Provided are a phenolic resin composition for shell molding that has low thermal expansion properties and high flexibility, a resin coated sand for shell molding obtained by using the same, and a shell mold formed of the same. The phenolic resin composition for shell molding that is capable of exhibiting advantageous mold characteristic is obtained by a combination of a phenolic resin that is obtained by a reaction of a phenol, a naphthol, and an aldehyde, and a fatty acid amide.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Applicant: Asahi Organic Chemicals Industry Co., Ltd.
    Inventors: Keiichi MORI, Tomohiro TAKAMA
  • Publication number: 20120029113
    Abstract: Provided are a phenolic resin composition for shell molding that has low thermal expansion properties and high flexibility, a resin coated sand for shell molding obtained by using the same, and a shell mold formed of the same. The phenolic resin composition for shell molding that is capable of exhibiting advantageous mold characteristic is obtained by a combination of a phenolic resin that is obtained by a reaction of a phenol, a naphthol, and an aldehyde, and a fatty acid amide.
    Type: Application
    Filed: October 11, 2011
    Publication date: February 2, 2012
    Applicant: Asahi Organic Chemicals Industry Co., Ltd.
    Inventors: Keiichi Mori, Tomohiro Takama
  • Publication number: 20110217554
    Abstract: A phenolic resin for shell molding is provided which generates less tar during casting and has low thermal expansion properties and high flexibility. Further, a process for producing the phenolic resin, RCS obtained by using the phenolic resin, and a shell mold obtained by using such RCS are provided. A phenolic resin having advantageous characteristics is obtained by reacting phenols and naphthols with aldehydes in the presence of at least one of divalent metal salt and oxalic acid which acts as catalyst.
    Type: Application
    Filed: May 13, 2011
    Publication date: September 8, 2011
    Applicant: Asahi Organic Chemicals Industry Co., Ltd.
    Inventors: Keiichi MORI, Tomohiro TAKAMA