Patents by Inventor Ryuhei KUROKAWA

Ryuhei KUROKAWA 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: 20230398723
    Abstract: A mold, a method for producing a plate-shaped molded article, and a method for producing a test piece capable of easily producing a test piece in which an orientation direction of a filler is highly aligned are provided. A method for predicting a characteristic of a resin composition molded article is also provided, the method being able to measure an anisotropy characteristic value of a resin composition by using the test piece and to improve prediction accuracy by using the characteristic value in a computer analysis. Further in detail, a mold for injection molding the plate-shaped molded article by using a molten material of a thermoplastic resin includes a runner section that has a slit gate section provided along a width direction of the plate-shaped molded article and is configured to fill a cavity with the molten material, which is injected via a sprue section, via the slit gate section.
    Type: Application
    Filed: October 14, 2021
    Publication date: December 14, 2023
    Applicant: DIC Corporation
    Inventors: Ryuhei Kurokawa, Kazuhiro Ichikawa
  • Publication number: 20230364836
    Abstract: A forced extraction molded article that can prevent damage during forced extraction is provided. The force extraction molded article (1) is formed of a polyarylene sulfide resin composition so as to include a cylindrical portion, wherein the cylindrical portion (10) has at a forward end portion a bulge (11), and an inner surface including a step in the outer diameter direction at the forward end portion, a portion excluding the step has a gradient such that the inner diameter of the cylindrical portion increases toward the forward end portion, and equation (a) below using a thickness D2 between a connection portion at the step on the inner surface of the cylindrical portion and the outer surface excluding the bulge, a height D4 of the step, and a height Dt of the gradient excluding the step on the inner surface of the cylindrical portion is satisfied. [ Equation ? 1 ] ? 0 . 0 ? 0 ? 1 ? D ? 2 2 - D ? 4 D ? 2 × D ? t D ? 2 ? 0 .
    Type: Application
    Filed: September 28, 2021
    Publication date: November 16, 2023
    Applicant: DIC Corporation
    Inventors: Ryuhei KUROKAWA, Masashi KUNISHIGE, Shinya GIBO