Patents Assigned to The Japan Steel Works, Ltd.
  • Publication number: 20240083082
    Abstract: A shut-off nozzle includes a nozzle body portion having an in-nozzle flow path formed therein, and a needle valve that is inserted into the nozzle body portion coaxially with the nozzle body portion and is configured to open and close an outlet of the in-nozzle flow path. A cylindrical portion is formed in the vicinity of a tip portion of the needle valve. A cylindrical hole portion is formed in the vicinity of a tip portion of the in-nozzle flow path, the cylindrical hole portion being a cylindrical hole. The cylindrical portion is configured to be fitted into the cylindrical hole portion in a case where the needle valve is driven in a forward direction.
    Type: Application
    Filed: August 30, 2023
    Publication date: March 14, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Kiyotaka NAKAYAMA
  • Patent number: 11926084
    Abstract: There are provided a mold clamping device and an injection molding machine including a guide mechanism which reliably prevents falling of a movable platen. The mold clamping device includes: a fixed platen fixed to a bed; a mold clamping housing configured to be slidable on the bed; a movable platen configured to be slidable on the bed between the fixed platen and the mold clamping housing; a plurality of tie-bars connecting the fixed platen and the mold clamping housing and penetrating the movable platen; a mold clamping mechanism provided between the mold clamping housing and the movable platen; a linear guide provided with the movable platen and configured to slide with respect to the bed; and a tie-bar guide bush provided with the movable platen and configured to slide with respect to the tie-bar.
    Type: Grant
    Filed: February 4, 2022
    Date of Patent: March 12, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventor: Kyouhei Matsuura
  • Patent number: 11911941
    Abstract: A shut-off nozzle includes: an injection nozzle in which a flow path is formed; a needle valve provided in the flow path coaxially with the injection nozzle, the needle valve being movable forward and backward in an axial direction; and a guide ring provided in the flow path. The needle valve includes a columnar shaft portion, and the guide ring is configured to guide the forward and backward movement of the needle valve at the shaft portion. An injection device includes: a heating cylinder; a screw provided in the heating cylinder; and the shut-off nozzle provided in the heating cylinder. An injection molding machine includes: a mold clamping device configured to clamp a mold; and the injection device configured to inject a resin.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: February 27, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yuya Horimoto, Takafumi Nishibe
  • Publication number: 20240051208
    Abstract: An injection molding machine includes a heating cylinder provided with a gas inlet, a screw, a gas cylinder, a pressure reducing valve configured to reduce a primary pressure of a gas from the gas cylinder to a secondary pressure, a gas supply portion configured to supply the gas at the secondary pressure to the gas inlet, a secondary pressure detection device configured to detect the secondary pressure, and a controller. The controller is configured to detect an abnormality by comparing a set pressure set in advance in the injection molding machine with the secondary pressure.
    Type: Application
    Filed: November 17, 2021
    Publication date: February 15, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Publication number: 20240042664
    Abstract: An injection molding machine includes a heating cylinder having a gas inlet, a screw, a gas cylinder, a pressure reducing valve configured to reduce a primary pressure of a gas from the gas cylinder to a secondary pressure, a gas supply portion configured to supply the gas at the secondary pressure to the gas inlet, an injection material pressure detection device configured to detect an injection material pressure in a vicinity of the gas inlet, and a controller. The controller is configured to detect an abnormality by comparing the injection material pressure with the secondary pressure.
    Type: Application
    Filed: November 17, 2021
    Publication date: February 8, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Patent number: 11891682
    Abstract: An iron-based sintered alloy, which has a composition including, in terms of percent by mass, Ti: 18.4 to 24.6%, Mo: 2.8 to 6.6%, C: 4.7 to 7.0%, Cr: 7.5 to 10.0%, Ni: 4.5 to 6.5%, Co: 1.5 to 4.5%, Al: 0.6 to 1.0%, the balance being Fe and unavoidable impurities, wherein the alloy has a structure in which hard particles are dispersed in an island form in a matrix, among other characteristics.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: February 6, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yusuke Watanabe, Kakeru Kusada, Tetsuo Makida, Youhei Sawamura
  • Publication number: 20240017452
    Abstract: An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).
    Type: Application
    Filed: November 17, 2021
    Publication date: January 18, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akihiro NAITO, Takuya YUFU
  • Publication number: 20240009904
    Abstract: A mold clamping device includes two mold platens; a plurality of ball screw mechanisms connecting the mold platens to each other; and a plurality of servo motors configured to drive the respective ball screw mechanisms. Each of ball screws respectively configuring the plurality of ball screw mechanisms is provided with a cover which covers at least a part of the corresponding ball screw between the two mold platens.
    Type: Application
    Filed: July 7, 2023
    Publication date: January 11, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Souma MITANI
  • Publication number: 20240001600
    Abstract: When acquiring a DR request for adjusting a use electric power amount from an electric power source, a control device executes an electric power control depending on the DR request.
    Type: Application
    Filed: June 13, 2023
    Publication date: January 4, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Kei IWATA
  • Publication number: 20240001599
    Abstract: A mold clamping device includes two mold platens; a ball screw mechanism connecting the mold platens to each other, the ball screw mechanism being provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism; a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism; and a control device configured to: monitor the axial force detected by the axial force detector during injection; and based on detecting an axial force increase, the axial force increase being an increase in the axial force, perform a mold clamping force increase control including driving the servo motor to increase a mold clamping force for tightening the ball screw mechanism.
    Type: Application
    Filed: June 22, 2023
    Publication date: January 4, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Souma MITANI
  • Patent number: 11858175
    Abstract: In a continuous kneading apparatus according to an embodiment, for each of a plurality of ring-shaped heaters, a control unit determines a current state and a reward for an action selected in the past based on a control error calculated from an acquired temperature; updates a control condition based on the reward, and determines an optimum action corresponding to the current state under the updated control condition, the control condition being a combination of a state and an action; and controls a target ring-shaped heater based on the optimum action.
    Type: Grant
    Filed: September 28, 2021
    Date of Patent: January 2, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Ryuichiro Maenishi, Soma Tanaka
  • Publication number: 20230415392
    Abstract: A mold clamping device includes two mold platens; a plurality of ball screw mechanisms connecting the mold platens to each other; a plurality of servo motors respectively configured to drive the ball screw mechanisms; and a control device. The control device is configured to independently control the servo motors based on a plurality of axial force setting values respectively set for the plurality of ball screw mechanisms, and the plurality of axial force setting values are set in the control device based on a constraint condition defining an allowable range within which the axial force setting values are settable.
    Type: Application
    Filed: June 21, 2023
    Publication date: December 28, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Souma MITANI
  • Publication number: 20230405899
    Abstract: A mold clamping device includes at least two mold platens and a plurality of rod-shaped members connecting two of the mold platens. An offset load detector is provided for at least one of the rod-shaped members at a connection portion between the at least one of the rod-shaped members and at least one of the mold platens. The offset load detector is configured to detect loads at two or more different detection positions, respectively, in a circumferential direction of the at least one of the rod-shaped members.
    Type: Application
    Filed: June 8, 2023
    Publication date: December 21, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Souma MITANI
  • Publication number: 20230405892
    Abstract: A mold clamping device includes a fixed platen fixed on the bed, a movable platen provided slidably with respect to the bed, a rotary platen provided on the movable platen, and a rotary platen support configured to rotatably support the rotary platen. A rail is laid on the bed, and the rotary platen support is provided with a rotary platen-side slider which is slidable while being guided by the rail.
    Type: Application
    Filed: June 13, 2023
    Publication date: December 21, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventor: Souma MITANI
  • Patent number: 11845207
    Abstract: An injection device includes: a swivel base; and an injection unit mounted on the swivel base and configured to be rotatable, in which the injection unit is provided with a swivel mechanism including: a horizontal support shaft having a tip end portion fixed to the injection unit; an axle penetrated by the support shaft at a position eccentric from an axis and rotatably provided with respect to the support shaft; and a wheel penetrated by the axle at a position of an axis and is rotatably provided with respect to the axle, in which in a case where a rotation position is set to a stop position, the wheel is apart from the swivel base, and in which in a case where the rotation position is set to a swivel position, the wheel contacts with the swivel base and the injection unit is swivelable on the swivel base.
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: December 19, 2023
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventor: Souma Mitani
  • Patent number: 11845211
    Abstract: An injection device includes: a heating cylinder; a screw disposed in the heating cylinder; and a pair of piston cylinder components disposed on two sides of the heating cylinder. The pair of piston cylinder components are installed so that one end portion of each of the pair of piston cylinder components is connected to a mold clamping device, and the heating cylinder and the screw are integrally driven in a direction close to or away from the mold clamping device by expansion and contraction of the pair of piston cylinder components. One of the pair of piston cylinder components is provided with a stop mechanism configured to stop expansion and contraction of the piston cylinder component.
    Type: Grant
    Filed: June 3, 2022
    Date of Patent: December 19, 2023
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yutaka Nakagawa, Yusuke Yonehara, Toshio Toyoshima
  • Publication number: 20230392280
    Abstract: An object of the present invention is to provide a GaN crystal long in light emission lifetime by time-resolved photoluminescence measurement and provide high-quality GaN crystal and GaN substrate that have few specified crystal defects affecting the light emission lifetime. A gallium nitride crystal having a light emission lifetime by time-resolved photoluminescence measurement, of 5 ps or more and 200 ps or less, and satisfying at least one of the following requirement (i) and requirement (ii): (i) an FWHM in a 004 diffraction X-ray rocking curve is 50 arcsec or less at least one position of the crystal; and (ii) a dislocation density is 5×106 cm?2 or less.
    Type: Application
    Filed: August 24, 2023
    Publication date: December 7, 2023
    Applicants: MITSUBISHI CHEMICAL CORPORATION, THE JAPAN STEEL WORKS, LTD., TOHOKU UNIVERSITY
    Inventors: Yutaka MIKAWA, Hirotaka IKEDA, Quanxi BAO, Kouhei KURIMOTO, Kohei SHIMA, Kazunobu KOJIMA, Toru ISHIGURO, Shigefusa CHICHIBU
  • Publication number: 20230382033
    Abstract: A heating cylinder heater includes a plurality of infrared heaters disposed around a heating cylinder in a non-contact manner with respect to the heating cylinder, a heat insulating material provided outside the infrared heaters, and a cover configured to cover the heat insulating material. The cover has two or more opening portions, and a part or all of the two or more opening portions are each provided with an opening-closing device that is configured to open and close the corresponding opening portion.
    Type: Application
    Filed: May 23, 2023
    Publication date: November 30, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Takuya YUFU, Akihiro NAITO, Yasutaka OTSUJI
  • Publication number: 20230382034
    Abstract: An injection molding machine includes a control device configured to output at least one set of operator support information. The operator support information includes a set of support target setting data and control target predicted amount of power. The support target setting data includes at least one piece of setting data configuring a molding condition. The control target predicted amount of power is a predicted amount of power consumption of a control target controlled in association with the support target setting data with respect to a change in the support target setting data.
    Type: Application
    Filed: May 23, 2023
    Publication date: November 30, 2023
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Takuya YUFU, Akihiro Naito, Yasutaka Otsuji
  • Patent number: 11826938
    Abstract: An injection piston drives a screw. An injection hydraulic cylinder drives the injection piston and is partitioned into first and second chambers. A first oil discharge port is disposed in the injection hydraulic cylinder to be blocked by a piston part when the piston part of the injection piston advances to a pressure-holding switching position, and discharges hydraulic oil from the second chamber. A second oil discharge port is disposed in the injection hydraulic cylinder to be capable of discharging hydraulic oil from the second chamber regardless of the position of the injection piston. The injection piston has first and second members. The joint of the first and second members is disposed at a position separated from an end of the piston part on a side of the second chamber by a predetermined distance.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: November 28, 2023
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Takehiko Yanagiya, Yutaka Nakagawa, Chikara Kawabe, Takahiro Sugahara