Patents Assigned to The Japan Steel Works, Ltd.
  • Patent number: 12030223
    Abstract: A strand manufacturing apparatus capable of reducing variations among diameters of resin strands without stopping the operation of an extruder is provided. A strand manufacturing apparatus includes a die in which an outflow hole for discharging a resin material contained in an extruder as a string-shaped resin strand is formed, an adjustment valve configured to adjust opening of the outflow hole, an image acquisition unit configured to acquire an image of the resin strand extruded from the outflow hole, a diameter acquisition unit configured to acquire a diameter of the resin strand in the image, and an opening adjustment unit configured to adjust the opening by driving the adjustment valve based on the diameter of the resin strand acquired by the diameter acquisition unit.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: July 9, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yohei Fukuzawa, Yusuke Fukushi, Hideki Tomiyama
  • Patent number: 12023842
    Abstract: In a resin-film manufacturing apparatus of an embodiment, when a lip gap control is started, a difference between a state of a target heat bolt (THB) at a start of current control and a state of each of all the heat bolts at a start of last control is obtained, when the difference between the states of THB at the starts of the current and last control is a smallest one, a learning result of THB is set as an initial value of a control condition for THB, and when the difference between the states of THB is not the smallest one, either one of a learning result of the heat bolt of which the difference between the states is smaller than the difference between the states of THB and the learning result of THB is set as the initial value of the control condition for THB.
    Type: Grant
    Filed: August 19, 2021
    Date of Patent: July 2, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Ryuichiro Maenishi, Soma Tanaka
  • Publication number: 20240198570
    Abstract: An injection molding machine has a clamp that generates electromagnetic force and that secures a moving plate or a fixed plate using attractive force that is produced by the electromagnetic force; a pressure sensor that is provided in the clamp, wherein the pressure sensor measures contact pressure that acts between the moving plate or the fixed plate and the clamp; and a controller for performing a measure to prevent detachment of the moving plate or the fixed plate based on the contact pressure.
    Type: Application
    Filed: December 14, 2023
    Publication date: June 20, 2024
    Applicant: The Japan Steel Works, Ltd.
    Inventors: Keigo SUSA, Motomu FURUMOTO
  • Publication number: 20240198569
    Abstract: An injection molding machine has a clamp that generates electromagnetic force and that secures a moving plate or a fixed plate using attractive force that is produced by the electromagnetic force; and a controller that controls separation force that acts on the moving plate or the fixed plate such that the separation force is less than the attractive force.
    Type: Application
    Filed: December 14, 2023
    Publication date: June 20, 2024
    Applicant: The Japan Steel Works, Ltd.
    Inventors: Keigo SUSA, Motomu FURUMOTO
  • Patent number: 12011860
    Abstract: A screw can be driven along an axial direction of a heating barrel and rotatable. An injection piston drives the screw along the axial direction. An injection hydraulic cylinder is partitioned into a first chamber in which pressured hydraulic oil for driving the injection piston is supplied and a second chamber from which hydraulic oil is discharged, and drives the injection piston in the axial direction by hydraulic pressure. A first oil discharge port is blocked by the injection piston when the injection piston advances to a holding pressure switching position. A second oil discharge port can discharge the hydraulic oil from the front chamber regardless of the position of the injection piston. The first oil discharge port is disposed at a position opposed to the first oil discharge port across a center axis of the injection hydraulic cylinder, and is connected to the first oil discharge port.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: June 18, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Yutaka Nakagawa, Toshio Toyoshima, Takehiko Yanagiya
  • Publication number: 20240191395
    Abstract: A gallium nitride crystal, containing F in which a total content of halogen elements other than F is 1/100 or less of a content of F and including a main surface 1 having an inclination of 0 degrees or more and 10 degrees or less from a (000-1) crystal plane in which the main surface 1 is a specific main surface A satisfying a specific condition regarding facet growth region in which a first line segment which is a virtual line segment extending in a first direction on the specific main surface A and having a length of 40 mm and a second line segment which is a virtual line segment extending in a second direction perpendicular to the first direction on the specific main surface A and having a length of 40 mm can be drawn, has fewer specific crystal defects and is of high quality,
    Type: Application
    Filed: February 23, 2024
    Publication date: June 13, 2024
    Applicants: MITSUBISHI CHEMICAL CORPORATION, THE JAPAN STEEL WORKS, LTD.
    Inventors: Yutaka MIKAWA, Kouhei KURIMOTO, Quanxi BAO
  • Patent number: 12009183
    Abstract: In a film-forming technology using charged particles, a disturbance in film thickness distribution caused by leakage magnetic field is suppressed. A film-forming method embodies a technological idea of switching generation and stop of a magnetic field during a film-forming operation so as to stop the generation of the magnetic field during a period when plasma is generated and generate the magnetic field during a period when plasma is not generated.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: June 11, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Keisuke Washio, Masao Nakata, Tatsuya Matsumoto, Junichi Shida
  • Patent number: 11999085
    Abstract: An injection molding machine includes: a fixed side member; and a movable side member fixed to the fixed side member, the movable side member being driven by a motor in order to perform injection molding of a molded product. The injection molding machine further includes a power feeding apparatus, one or more motors, and at least one servo amplifier. The power feeding apparatus converts a three-phase AC voltage into a DC voltage. The one or more of the motors are provided in the movable side member and drive the movable side member. The at least one servo amplifier is provided in the movable side member and drives one of the one or more of the motors by the DC voltage being supplied thereto through a DC power supply line.
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: June 4, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventor: Keigo Fukuda
  • Patent number: 11992973
    Abstract: The present invention provides a kneading method for a fiber-reinforced thermoplastic resin with which dispersibility of reinforcement fibers is enhanced and sufficient reinforcement fibers having a proper fiber length remain, and a fiber-reinforced thermoplastic resin plasticizing device and an extruding machine for carrying out the method. The kneading method comprises supplying a thermoplastic resin and reinforcement fibers into a cylinder of a plasticizing device, and rotating a screw to obtain a fiber-reinforced thermoplastic resin, wherein the size of a clearance between the bore of the cylinder and the screw is made different between an upstream side in the vicinity of a reinforcement fiber loading port and a downstream side, so that the clearance becomes larger from the vicinity of the reinforcement fiber loading port toward the downstream side compared with the upstream side.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: May 28, 2024
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Akira Yasue, Hideki Chiba, Daisuke Kunihiro, Shoso Nishida, Kazuya Tsuji, Yasufumi Fujita, Kazuki Fujita, Yukihiro Sumihiro
  • Publication number: 20240157623
    Abstract: A die 6 includes a central member 6a, an injection hole formed from a surface of the central member 6a to an inside, a plurality of nozzles formed from an opposite surface of the central member 6a to the inside and connected to the injection hole, a heat source provided inside the central member 6a, and a plurality of heat insulating portions 31a provided inside the central member 6a. The plurality of heat insulating portions 31a extend from an outer peripheral side of the central member 6a toward an inner side of the central member 6a in plan view.
    Type: Application
    Filed: November 1, 2021
    Publication date: May 16, 2024
    Applicant: THE JAPAN STEEL WORKS, LTD.
    Inventors: Naoki UEDA, Tomonori HASHIMOTO, Hiroyuki KAWANO, Soichiro MATSUDA, Fumiya YAMABE
  • 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