Patents by Inventor Kazuhiro Hanai

Kazuhiro Hanai 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).

  • Injection molding method and injection molding apparatus
    Patent number: 7422426
    Abstract: The present invention provides an injection molding method which intends to lower a mold clamping force in view of both of a projected area of a molded article and an injection pressure, and contributes to an energy saving and a reduction in a cost of equipment and a manufacturing cost. In a cavity (13) formed in a metal mold (5) for an injection molding, there are arranged a first gate (21) injecting a first molten resin (101) anteceding in one end side (a charging start side) in a longitudinal direction, and a second gate (22) injecting a second molten resin (102) following in another end side (a charging finish side). The second molten resin (102) is newly injected from the second gate (22) before a fluid head portion of the first molten resin (101) injected from the first gate (21) reaches a position of the second gate (22).
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: September 9, 2008
    Assignee: Daiwa Kasei Indsutry Co., Ltd.
    Inventors: Toshi Saeki, Makoto Suzuki, Katsumasa Isogai, Kazuhiro Hanai, Syuuichi Hazama
  • Injection molding method and injection molding apparatus
    Patent number: 7338627
    Abstract: The present invention provides an injection molding method which intends to lower a mold clamping force in view of both of a projected area of a molded article and an injection pressure, and contributes to an energy saving and a reduction in a cost of equipment and a manufacturing cost. In a cavity (13) formed in a metal mold (5) for an injection molding, there are arranged a first gate (21) injecting a first molten resin (101) anteceding in one end side (a charging start side) in a longitudinal direction, and a second gate (22) injecting a second molten resin (102) following in another end side (a charging finish side). The second molten resin (102) is newly injected from the second gate (22) before a fluid head portion of the first molten resin (101) injected from the first gate (21) reaches a position of the second gate (22).
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: March 4, 2008
    Assignee: Daiwa Kasei Industry Co., Ltd.
    Inventors: Toshi Saeki, Makoto Suzuki, Katsumasa Isogai, Kazuhiro Hanai, Syuuichi Hazama
  • Injection molding method and injection molding apparatus
    Publication number: 20060141088
    Abstract: The present invention provides an injection molding method which intends to lower a mold clamping force in view of both of a projected area of a molded article and an injection pressure, and contributes to an energy saving and a reduction in a cost of equipment and a manufacturing cost. In a cavity (13) formed in a metal mold (5) for an injection molding, there are arranged a first gate (21) injecting a first molten resin (101) anteceding in one end side (a charging start side) in a longitudinal direction, and a second gate (22) injecting a second molten resin (102) following in another end side (a charging finish side). The second molten resin (102) is newly injected from the second gate (22) before a fluid head portion of the first molten resin (101) injected from the first gate (21) reaches a position of the second gate (22).
    Type: Application
    Filed: February 14, 2006
    Publication date: June 29, 2006
    Inventors: Toshi Saeki, Makoto Suzuki, Katsumasa Isogai, Kazuhiro Hanai, Syuuichi Hazama
  • Injection molding method and injection molding apparatus
    Publication number: 20050012243
    Abstract: The present invention provides an injection molding method which intends to lower a mold clamping force in view of both of a projected area of a molded article and an injection pressure, and contributes to an energy saving and a reduction in a cost of equipment and a manufacturing cost. In a cavity (13) formed in a metal mold (5) for an injection molding, there are arranged a first gate (21) injecting a first molten resin (101) anteceding in one end side (a charging start side) in a longitudinal direction, and a second gate (22) injecting a second molten resin (102) following in another end side (a charging finish side). The second molten resin (102) is newly injected from the second gate (22) before a fluid head portion of the first molten resin (101) injected from the first gate (21) reaches a position of the second gate (22).
    Type: Application
    Filed: August 4, 2003
    Publication date: January 20, 2005
    Inventors: Toshi Saeki, Makoto Suzuki, Katsumasa Isogai, Kazuhiro Hanai, Syuuichi Hazama