Patents by Inventor Katsuyuki ARAKI

Katsuyuki ARAKI 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).

  • Screw of injection molding machine for foam molding and injection molding machine
    Patent number: 11504891
    Abstract: The present disclosure relates to a screw of an injection molding machine in which a heating cylinder is formed with a first compression section, a starvation section, and a second compression section, and in which an inert gas is to be introduced into the starvation section. At a portion of the screw corresponding to the first compression section, a barrier flight as a double flight including a combination of a main flight and a sub-flight having a lead angle larger than that of the main flight is formed, and a dam flight having a predetermined-width ring shape is formed, downstream of, i.e., in front of the barrier flight. A seal structure to prevent backflow of the resin may be provided between the dam flight and the starvation section.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: November 22, 2022
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro Naito, Katsuyuki Araki, Koichi Tamada, Hiromasa Uezono, Hideaki Nakashima
  • SCREW OF INJECTION MOLDING MACHINE FOR FOAM MOLDING AND INJECTION MOLDING MACHINE
    Publication number: 20210178648
    Abstract: The present disclosure relates to a screw of an injection molding machine in which a heating cylinder is formed with a first compression section, a starvation section, and a second compression section, and in which an inert gas is to be introduced into the starvation section. At a portion of the screw corresponding to the first compression section, a barrier flight as a double flight including a combination of a main flight and a sub-flight having a lead angle larger than that of the main flight is formed, and a dam flight having a predetermined-width ring shape is formed, downstream of, i.e., in front of the barrier flight. A seal structure to prevent backflow of the resin may be provided between the dam flight and the starvation section.
    Type: Application
    Filed: August 23, 2019
    Publication date: June 17, 2021
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Katsuyuki ARAKI, Koichi TAMADA, Hiromasa UEZONO, Hideaki NAKASHIMA