Patents by Inventor Hodaka Yokomizo

Hodaka Yokomizo 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).

  • Patent number: 10889076
    Abstract: A method for producing a fiber-reinforced resin shaped product, by clamping and press-molding a molding material containing reinforcing fibers and a thermoplastic resin as a matrix in molds having an upper mold and a lower mold. The method includes: disposing the molding material heated in a plastic state, between the upper mold and the lower mold; initiating the clamping to apply a force in a substantially clamping direction to a certain site of the molding material; starting deformation of the molding material in the substantially clamping direction; applying a force in the substantially clamping direction to a fixing site which is at least a part of a substantially outer peripheral end portion of the molding material but is different from the certain site; pressing and fixing the fixing site, and completing the clamping to obtain a fiber-reinforced resin shaped product having an edge portion.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: January 12, 2021
    Assignee: Teijin Limited
    Inventors: Hodaka Yokomizo, Shuhei Suzuki, Masahiro Kitagawa, Hidenori Aoki
  • Publication number: 20210003538
    Abstract: The present invention provides a method for inspecting a material to be inspected using ultrasound waves, the method including the following step 201 to step 301, in which step 201 is performed in a condition where: the surface temperature of a material under inspection—atmospheric temperature >2° C., and inspection using ultrasound waves in step 301 satisfies: a refractive attenuation rate ?1.5%. Step 201: blowing a fluid from a blowing port onto the material to be inspected. Step 301: inspecting the material to be inspected using the ultrasound waves after step 201 or at the same time as the step 201.
    Type: Application
    Filed: March 6, 2019
    Publication date: January 7, 2021
    Applicant: Teijin Limited
    Inventors: Takashi Toyozumi, Hodaka Yokomizo, Makoto Ootsubo, Shuhei Suzuki, Akihiko Obata
  • Patent number: 10850431
    Abstract: A conveyance device includes a plurality of holding mechanisms and one or more pressing mechanisms, the holding mechanisms each include a holder that holds a molding material and a holder movement mechanism that moves the holder, and the pressing mechanisms each include a pusher that comes into contact with and pushes the molding material and a pusher movement mechanism that moves the pusher.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 1, 2020
    Assignees: SHIBAURA MACHINE CO., LTD., TEIJIN LIMITED
    Inventors: Kazuhito Sato, Chiaki Shigematsu, Hodaka Yokomizo, Tetsuya Yoneda, Akihiko Obata
  • Patent number: 10843387
    Abstract: To provide a method of manufacturing a press molding by molding a molding material comprising reinforced fibers and a thermoplastic resin by a cold press method. The method of manufacturing a press molding comprising reinforced fibers and a thermoplastic resin, includes the steps of: holding the molding material heated at a temperature not lower than the softening temperature with a plurality of grippers installed on a carrier; carrying the molding material between the upper mold and the lower mold of a mold for molding; pushing the molding material with pushers to preform it at a predetermined preforming rate; and press molding the preformed molding by closing the upper mold and the lower mold and applying pressure.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 24, 2020
    Assignees: TEIJIN LIMITED, SHIBAURA MACHINE CO., LTD.
    Inventors: Hodaka Yokomizo, Tetsuya Yoneda, Akihiko Obata, Kazuhito Sato, Chiaki Shigematsu
  • Patent number: 10836078
    Abstract: A molded article including carbon fibers and thermoplastic resin, the molded article being provided with a hole h1, wherein the molded article has a region a around the hole h1, the relationship between the linear expansion coefficient C1 in the plate thickness direction in region a and the linear expansion coefficient C2 in a molded article region other than the region a is C1/C2<1, and the relationship of the carbon fiber volume fraction Vf1 of region a and the carbon fiber volume fraction Vf2 of a molded article region other than the region a is 0.2<Vf1/Vf2.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: November 17, 2020
    Assignee: Teijin Limited
    Inventors: Shuhei Suzuki, Hodaka Yokomizo
  • Patent number: 10428192
    Abstract: There is provided a plate-shaped carbon fiber reinforced molding material comprising a thermoplastic resin, carbon fibers (A) and carbon fibers (B), wherein: i) the carbon fibers (A) have fiber lengths ranging from 0.01 mm to less than 3 mm, ii) the carbon fibers (B) have fiber lengths ranging from 3 mm to less than 100 mm, iii) 1.0<LwA/LnA<3 is satisfied where LwA and LnA are a weight-average fiber length and a number-average fiber length of the carbon fibers (A), respectively, and iv) the carbon fibers (B) are two-dimensionally randomly oriented.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: October 1, 2019
    Assignee: Teijin Limited
    Inventors: Shuhei Suzuki, Takaya Fujii, Hodaka Yokomizo, Hidenori Aoki
  • Patent number: 10322568
    Abstract: A shaped product of a fiber-reinforced composite material includes a well-shaped part and a surface-shaped part, in which the well-shaped part includes a fiber-reinforced composite material C including both discontinuous reinforcing fibers and a thermoplastic resin, and the surface-shaped part includes a thermoplastic-resin-based material, and the shaped product includes no irregular-shape portion in the well-shaped part and no weld at a boundary edge between the well-shaped part and the surface-shaped part.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: June 18, 2019
    Assignee: Teijin Limited
    Inventors: Yukino Oosawa, Hidenori Aoki, Hodaka Yokomizo
  • Publication number: 20190160715
    Abstract: Provided is a method for manufacturing a fiber-reinforced resin molded article by cold press molding a fiber-reinforced resin material including reinforcing fibers and a thermoplastic resin using molds containing an upper mold and a lower mold. In the method, the respective parameters for: heating temperature; charge time; air-cooling rate; pressurization time; flow-stopping temperature; and a moldable time satisfies specified numerical ranges simultaneously.
    Type: Application
    Filed: July 27, 2017
    Publication date: May 30, 2019
    Applicant: Teijin Limited
    Inventors: Masaki Mitsunaga, Hodaka Yokomizo
  • Publication number: 20190016067
    Abstract: A method for producing a fiber-reinforced resin shaped product, by clamping and press-molding a molding material containing reinforcing fibers and a thermoplastic resin as a matrix in molds having an upper mold and a lower mold. The method includes: disposing the molding material heated in a plastic state, between the upper mold and the lower mold; initiating the clamping to apply a force in a substantially clamping direction to a certain site of the molding material: starting deformation of the molding material in the substantially clamping direction; applying a force in the substantially clamping direction to a fixing site which is at least a part of a substantially outer peripheral end portion of the molding material but is different from the certain site; pressing and fixing the fixing site, and completing the clamping to obtain a fiber-reinforced resin shaped product having an edge portion.
    Type: Application
    Filed: January 6, 2017
    Publication date: January 17, 2019
    Applicant: Teijin Limited
    Inventors: Hodaka Yokomizo, Shuhei Suzuki, Masahiro Kitagawa, Hidenori Aoki
  • Publication number: 20180361632
    Abstract: To provide a method of manufacturing a press molding by molding a molding material comprising reinforced fibers and a thermoplastic resin by a cold press method. The method of manufacturing a press molding comprising reinforced fibers and a thermoplastic resin, includes the steps of: holding the molding material heated at a temperature not lower than the softening temperature with a plurality of grippers installed on a carrier; carrying the molding material between the upper mold and the lower mold of a mold for molding; pushing the molding material with pushers to preform it at a predetermined preforming rate; and press molding the preformed molding by closing the upper mold and the lower mold and applying pressure.
    Type: Application
    Filed: December 16, 2016
    Publication date: December 20, 2018
    Applicants: TEIJIN LIMITED, TOSHIBA MACHINE CO., LTD.
    Inventors: Hodaka YOKOMIZO, Tetsuya YONEDA, Akihiko OBATA, Kazuhito SATO, Chiaki SHIGEMATSU
  • Patent number: 10086540
    Abstract: A method for manufacturing a press-molded product by cold-pressing a composite material containing a discontinuous carbon fiber and a thermoplastic resin, is provided. The method satisfies equations (1) and (2) and includes Steps 1 to 5: Step 1 is a step of placing a heated composite material in a mold; Step 2 is a step of allowing 1 second or less between pressurization start time t0 and time t1 of reaching flow starting pressure Pf; Step 3 is a step of reaching maximum pressure Pm at time t2; Step 4 is a pressure holding step of pressing the composite material at an average holding pressure Pk from time t2 to time t3; and Step 5 is a step of opening the mold and taking out a molded product from the mold; equation (1):??4<Pf/t1<7,500 [MPa/sec]; and equation (2):??45<Pk×(t3?t2)<5,400 [MPa·sec].
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: October 2, 2018
    Assignee: Teijin Limited
    Inventors: Ryo Shimodake, Hodaka Yokomizo
  • Publication number: 20180236693
    Abstract: A molded article including carbon fibers and thermoplastic resin, the molded article being provided with a hole h1, wherein the molded article has a region a around the hole h1, the relationship between the linear expansion coefficient C1 in the plate thickness direction in region a and the linear expansion coefficient C2 in a molded article region other than the region a is C1/C2<1, and the relationship of the carbon fiber volume fraction Vf1 of region a and the carbon fiber volume fraction Vf2 of a molded article region other than the region a is 0.2<Vf1/Vf2.
    Type: Application
    Filed: July 19, 2016
    Publication date: August 23, 2018
    Applicant: Teijin Limited
    Inventors: Shuhei Suzuki, Hodaka Yokomizo
  • Publication number: 20180169901
    Abstract: A conveyance device includes a plurality of holding mechanisms and one or more pressing mechanisms, the holding mechanisms each include a holder that holds a molding material and a holder movement mechanism that moves the holder, and the pressing mechanisms each include a pusher that comes into contact with and pushes the molding material and a pusher movement mechanism that moves the pusher.
    Type: Application
    Filed: December 4, 2017
    Publication date: June 21, 2018
    Applicants: Toshiba Kikai Kabushiki Kaisha, Teijin Limited
    Inventors: Kazuhito Sato, Chiaki Shigematsu, Hodaka Yokomizo, Tetsuya Yoneda, Akihiko Obata
  • Patent number: 9688854
    Abstract: There is provided a material for molding including: carbon fiber bundles which are easily impregnated including carbon fibers and at least one impregnation aid in an amount of 3 to 15 parts by mass based on 100 parts by mass of the carbon fibers, the at least one impregnation aid satisfying specific requirements; and a polycarbonate is adhered thereto in an amount of 50 to 2000 parts by mass.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: June 27, 2017
    Assignee: Teijin Limited
    Inventors: Hodaka Yokomizo, Takeshi Matsuda, Takashi Ito, Ikko Furukawa
  • Publication number: 20170057208
    Abstract: A shaped product of a fiber-reinforced composite material includes a well-shaped part and a surface-shaped part, in which the well-shaped part includes a fiber-reinforced composite material C including both discontinuous reinforcing fibers and a thermoplastic resin, and the surface-shaped part includes a thermoplastic-resin-based material, and the shaped product includes no irregular-shape portion in the well-shaped part and no weld at a boundary edge between the well-shaped part and the surface-shaped part.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 2, 2017
    Applicant: Teijin Limited
    Inventors: Yukino Oosawa, Hidenori Aoki, Hodaka Yokomizo
  • Publication number: 20170015024
    Abstract: The present invention provides a molded product containing carbon fibers and a thermoplastic resin. The molded product has a stay portion, and the volume V of the stay portion and the thickness t of the molded product satisfy 1<V/t<60 (unit: mm2).
    Type: Application
    Filed: July 14, 2016
    Publication date: January 19, 2017
    Applicant: Teijin Limited
    Inventors: Shuhei Suzuki, Hodaka Yokomizo
  • Publication number: 20170008260
    Abstract: A molding material for a multi-layered structure, includes a thermoplastic resin layer (X) including carbon fibers (A) having a weight-average fiber length of 0.01 mm to less than 3 mm; and a thermoplastic resin layer (Y) including carbon fibers (B) having a weight-average fiber length of 3 mm to 100 mm, in which a density parameter PY of the thermoplastic resin layer (Y) expressed by the following Equation (1) is 1×102 to less than 1×104, and in which a density parameter PX of the thermoplastic resin layer (X) expressed by the following Equation (1) is more than 1×101: P=(q×Ln3)/h??(1), where q is the number of flow units of carbon fibers included in the thermoplastic resin layer per 1 mm2 unit area, Ln is a number-average fiber length (mm) of the carbon fibers, and h is a thickness (mm) of the thermoplastic resin layer.
    Type: Application
    Filed: January 19, 2015
    Publication date: January 12, 2017
    Applicant: Teijin Limited
    Inventors: Takaya Fujii, Shuhei Suzuki, Hodaka Yokomizo, Hidenori Aoki
  • Patent number: 9533437
    Abstract: A method for producing a shaped product having an opening by arranging a molding material including discontinuous carbon fibers and a thermoplastic resin on a mold and cold-pressing the molding material, wherein (1) the mold has a portion serving as a closable cavity and (2) the molding material to be arranged on the mold has a projected area larger than the projected area of the mold cavity, and wherein in the cold pressing, the molding material flows to form an end part of the shaped product, the distance over which the molding material flows being longer than 0 mm but not longer than 150 mm.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: January 3, 2017
    Assignee: Teijin Limited
    Inventors: Shuhei Suzuki, Hodaka Yokomizo
  • Publication number: 20160250785
    Abstract: A method for manufacturing a press-molded product by cold-pressing a composite material containing a discontinuous carbon fiber and a thermoplastic resin, is provided. The method satisfies equations (1) and (2) and includes Steps 1 to 5: Step 1 is a step of placing a heated composite material in a mold; Step 2 is a step of allowing 1 second or less between pressurization start time t0 and time t1 of reaching flow starting pressure Pf; Step 3 is a step of reaching maximum pressure Pm at time t2; Step 4 is a pressure holding step of pressing the composite material at an average holding pressure Pk from time t2 to time t3; and Step 5 is a step of opening the mold and taking out a molded product from the mold; 4<Pf/t1<7,500 [MPa/sec]; and??equation (1): 45<Pk×(t3?t2)<5,400 [MPa·sec].
    Type: Application
    Filed: February 26, 2016
    Publication date: September 1, 2016
    Applicant: Teijin Limited
    Inventors: Ryo Shimotake, Hodaka Yokomizo
  • Publication number: 20160194461
    Abstract: There is provided a plate-shaped carbon fiber reinforced molding material comprising a thermoplastic resin, carbon fibers (A) and carbon fibers (B), wherein: i) the carbon fibers (A) have fiber lengths ranging from 0.01 mm to less than 3 mm, ii) the carbon fibers (B) have fiber lengths ranging from 3 mm to less than 100 mm, iii) 1.0<LwA/LnA<3 is satisfied where LwA and LnA are a weight-average fiber length and a number-average fiber length of the carbon fibers (A), respectively, and iv) the carbon fibers (B) are two-dimensionally randomly oriented.
    Type: Application
    Filed: February 6, 2015
    Publication date: July 7, 2016
    Applicant: Teijin Limited
    Inventors: Shuhei SUZUKI, Takaya FUJII, Hodaka YOKOMIZO, Hidenori AOKI