Patents by Inventor Kazuyuki Ushizaka

Kazuyuki Ushizaka 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).

  • Method for controlling the forward movement speed of the screw in an injection molding machine
    Patent number: 6835337
    Abstract: In the filling step, the forward movement speed of the screw is controlled in accordance with a predetermined speed pattern until the screw reaches a deceleration initiation point, LS4B. After the screw reaches LS4B, a deceleration step is started. In the deceleration step, the forward movement speed of the screw is controlled in a feedback manner such that the internal pressure of the mold reaches a predetermined target pressure. When the screw reaches a pressure holding initiation point, LS4 (or pressure holding initiation time, TR2), the pressure holding step is started. In the pressure holding step, the target pressure, which is a function of time, is changed with time in accordance with a program. When the operation goes to the pressure holding step, the set of PID coefficients within the feedback control loop are replaced by different set of PID coefficients.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: December 28, 2004
    Assignee: Munekata Co., Ltd.
    Inventors: Kiyoshi Sasaki, Yasumasa Sugiyama, Hiroshi Katsuta, Hirofumi Tateyama, Kazuyuki Ushizaka, Atsuhiro Suzuki
  • Method for controlling the forward movement speed of the screw in an injection molding machine
    Publication number: 20020163097
    Abstract: In the filling step, the forward movement speed of the screw is controlled in accordance with a predetermined speed pattern until the screw reaches a deceleration initiation point, LS4B. After the screw reaches LS4B, a deceleration step is started. In the deceleration step, the forward movement speed of the screw is controlled in a feedback manner such that the internal pressure of the mold reaches a predetermined target pressure. When the screw reaches a pressure holding initiation point, LS4 (or pressure holding initiation time, TR2), the pressure holding step is started. In the pressure holding step, the target pressure, which is a function of time, is changed with time in accordance with a program. When the operation goes to the pressure holding step, the set of PID coefficients within the feedback control loop are replaced by different set of PID coefficients.
    Type: Application
    Filed: April 29, 2002
    Publication date: November 7, 2002
    Inventors: Kiyoshi Sasaki, Yasumasa Sugiyama, Hiroshi Katsuta, Hirofumi Tateyama, Kazuyuki Ushizaka, Atsuhiro Suzuki