Patents Assigned to Nissei Plastic Industrial Co., Ltd.
  • Publication number: 20080143025
    Abstract: There is provided a method for melting a material rod in a material melting and holding apparatus of a metal molding apparatus where the material melting and holding apparatus provided for the metal molding apparatus includes a furnace body of a melting and holding furnace, and a melting cylinder for a material rod and a material supply cylinder for directly supplying the material rod into the furnace body provided in parallel with each other on the furnace body, upon startup of molding, the material rod is melted using the melting cylinder prior to supplying the molten material from the melting cylinder into the melting and holding furnace, and the material rod subsequently supplied from the material supply cylinder to a bottom portion of the furnace body is submerged and melted by the molten material, thereby maintaining the submersion melting in the melting and holding furnace after the startup of molding.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 19, 2008
    Applicant: Nissei Plastic Industrial Co., Ltd.
    Inventors: Masaaki Minamimura, Yasuhiko Takeuchi, Toshiyasu Koda, Mamoru Miyagawa
  • Patent number: 7344673
    Abstract: A preform for a multi-layered hollow vessel has excellent moldability and productivity and is free from the deterioration of the characteristic properties of the vessel even when a recycled material is filled in large quantities. A molded product is produced by filling a first material and a second material into the cavity of an injection mold in a single molding step including (i) the substep of injecting the first material, (ii) the substep of injecting the first material and the second material at the same time and (iii) the substep of injecting the first material which are carried out continuously in this order.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: March 18, 2008
    Assignees: Teijin Limited, Nissei Plastic Industrial Co., Ltd.
    Inventors: Hodaka Yokomizo, Jitsuo Oda, Yasuhiko Takeuchi, Hiromitsu Miyajima
  • Patent number: 7343959
    Abstract: The present invention provides a pressure casting method of a magnesium alloy. In the method, a molten magnesium alloy is cooled to form a partially molten state containing a solid-phase, and the partially molten state is further cooled to form a solid-phase granularly crystallized solid material. The solid material is partially-melted and pressure cast into a mold by a molding machine. A ratio of primary crystals in said solid material is set to 55 to 65%. The solid material is partially-melted in a solid-phase and liquid-phase coexisting state at a selected heating temperature so that a semi-solid having thixotropic properties and having the size of a main solid phase of 50 to 250 ?m and a solid-phase ratio of 30 to 70% is formed. The semi-solid is pressure cast into a mold through a nozzle while maintaining the semi-solid state to form metal products having a ratio of primary crystals of 20 to 50%.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: March 18, 2008
    Assignees: Nissei Plastic Industrial Co., Ltd., Chiba Institute of Technology
    Inventors: Tetsuichi Motegi, Kazutoshi Takayama, Kiyoto Takizawa
  • Patent number: 7331372
    Abstract: To insert a cylindrical metallic raw material into a melting cylinder provided in a heating holding cylinder of a metal molding apparatus and to efficiently semi-melt or completely melt the cylindrical metallic raw material, a clearance between an inner circumferential surface of the melting cylinder and an outer circumferential surface of the cylindrical metallic raw material is limited to a range in which the clearance does not exceed 1.0 mm with respect to the inner diameter of the melting cylinder and the diameter of the metallic raw material during thermal expansion and the insertion of the metallic raw material in a non-thermal expansion state into the thermally expanding melting cylinder is possible, from a linear expansion coefficient of a metallic raw material and a linear expansion coefficient of a material of the melting cylinder.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: February 19, 2008
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Kiyoto Takizawa, Toshiyasu Koda, Mamoru Miyagawa, Kazuo Anzai, Koji Takei, Ikuo Uwadaira, Ko Yamazaki
  • Publication number: 20080008870
    Abstract: A composite plating layer contains carbon nanofibers. A composite plating solution contains a Watts bath composed mainly of nickel sulfate and nickel chloride, a brightening agent, a surface active agent and carbon nanofibers. Polyacrylic acid is used as the surface active agent.
    Type: Application
    Filed: October 25, 2005
    Publication date: January 10, 2008
    Applicants: NISSEI PLASTIC INDUSTRIAL CO., LTD., SHINSHU UNIVERSITY
    Inventors: Tomoyuki Sato, Susumu Arai
  • Publication number: 20080006385
    Abstract: A composite material composed of nanocarbon materials and metallic materials for a matrix is extrusion molded to have the nanocarbon materials oriented in one direction.
    Type: Application
    Filed: May 24, 2006
    Publication date: January 10, 2008
    Applicants: NISSEI PLASTIC INDUSTRIAL CO, LTD., NAGAOKA UNIVERSITY OF TECHNOLOGY
    Inventors: Masashi Suganuma, Atsushi Kato, Shigeharu Kamado, Daisuke Tsushima
  • Patent number: 7311135
    Abstract: A composite material composed of nanocarbon materials and metallic materials for a matrix is extrusion molded to have the nanocarbon materials oriented in one direction.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: December 25, 2007
    Assignees: Nissei Plastic Industrial Co., Ltd., Nagaoka University of Technology
    Inventors: Masashi Suganuma, Atsushi Kato, Shigeharu Kamado, Daisuke Tsushima
  • Patent number: 7303381
    Abstract: In an optical disc molding device, a heating medium from a low-temperature controller is made to flow in temperature controlling flow passages (passages 3a) formed at locations corresponding to boundary parts of two fixed molds 7 mounted parallel to each other on a fixed platen 3 and in temperature controlling flow passages (passages 6a) formed at locations corresponding to boundary parts of two movable molds 8 mounted parallel to each other on a movable platen 6 to supplement heat exchange.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 4, 2007
    Assignees: Taiyo Yuden Co., Ltd., Nissei Plastic Industrial Co. Ltd.
    Inventors: Kazunori Ishikura, Keiichi Kagawa, Izumi Igawa, Hidetoshi Egawa, Yuji Shibuya, Shinji Miki, Kiyoto Takizawa
  • Patent number: 7303701
    Abstract: A provisional temperature estimating mathematical expression is set in accordance with which plasticizing conditions used as terms are to be multiplied by unknown coefficients. Then, a given number of experiments not smaller than the number of the unknown coefficients are conducted while the plasticizing conditions are varied, so as to acquire various experimental data. The unknown coefficients are converted into known coefficient in accordance with the acquired experimental data so as to provide a complete temperature estimating mathematical expression, on the basis of which a plasticized resin temperature and noise-outlet resin temperature are determined arithmetically.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: December 4, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Yoshitoshi Yamagiwa, Takayoshi Shiori, Takashi Terashima, Eiki Iwashita
  • Patent number: 7303712
    Abstract: Injection molding of a product and compressive decoration molding of a surface of the molded product are performed using individual cavity molds. A decorative film can be molded efficiently with a thermosetting coating material under suitable temperature control regardless of the shape of the molded product. An injection cavity mold and a decoration cavity mold are employed. The injection cavity mold is set at a hardening temperature of a thermoplastic resin. The decoration cavity mold is set at a thermosetting temperature of a coating material. A molded product is injection-molded in the cavity mold for injection molding and released from the mold. A decorative coating material composed of a liquid thermosetting composition is mounted at least on a part of the top of the injection-molded product. The molded product is located within the cavity mold for decoration molding.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: December 4, 2007
    Assignees: Nippon Bee Chemical Co., Ltd., Nissei Plastic Industrial Co., Ltd.
    Inventors: Akihiro Kitamura, Nobuo Iijima, Yoshihiko Saitou, Haruo Okada, Toru Ikeda
  • Patent number: 7294302
    Abstract: To control the thickness of the skin layer of a composite resin molded product by a viscosity difference obtained by varying the viscosity by adding another ultra-minute substance to a raw resin material. The composite resin molded product comprising the skin layer formed of a first thermoplastic resin and the core layer formed of a second thermoplastic resin is molded by injection. The viscosity difference between the resins is controlled by adding a carbon nanomaterial to one or the other of the thermoplastic resins. The thickness of the skin layer is controlled by the viscosity difference. The first thermoplastic resin and the second thermoplastic resin are of the same kind or different kinds of resins.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: November 13, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Atsushi Koide, Yoshitoshi Yamagiwa, Masashi Suganuma
  • Patent number: 7267151
    Abstract: When a laminating apparatus M is constituted with a vacuum suction step S1 for vacuum sucking an enclosed space in a work tray 2 accommodating a laminated-substrate W, a thermocompression-bonding step S2 for heating and pressuring the work tray 2 having finished the vacuum suction step S1, and a cooling step S3 for cooling the work tray 2 having finished the thermocompression-bonding step S2, a conveyer route R of a rectangular frame form to circulatorily convey the work tray 2 along a horizontal direction is provided, and in a processing conveyer section Rp composing one side of the conveyer route R, the vacuum suction step S1, the theremocompression-bonding step S2, and the cooling step S3 are sequentially disposed.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: September 11, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Suinobu Kubota, Satoru Tokida
  • Patent number: 7244378
    Abstract: A clamping apparatus is operable in a closure position detection mode for detecting closure of a mold on the basis of a change in a physical quantity because of closure of the mold, detecting a position of a crosshead of a toggle mechanism at the time of detection of the closure, and obtaining a closure position of a movable platen at the time of the closure from the detected position of the crosshead. The apparatus is previously operated in the closure position detection mode to store, as a reference value, the closure position at which a target mold clamping force is obtained. In the production operation, the apparatus is operated in the closure position detection mode to obtain an actual closure position (detection value). The mold clamping force is corrected on the basis of a deviation of the detection value from the reference value.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: July 17, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Okada Haruo, Miyajima Masahiko, Hakoda Takashi
  • Patent number: 7244379
    Abstract: In a mold protection method for a mold clamping apparatus, a predetermined mold protection zone is set in a zone in which a mold is closed, and an anomaly such as presence of a foreign object is detected on the basis of a change in a physical quantity in the mold protection zone so as to protect the mold. The method includes the steps of previously setting, as a reference position, a closed position of a movable platen at which a target mold clamping force is obtained; setting an end position of the mold protection zone with respect to the reference position; obtaining, during a production operation, an actual closed position (detected position) of the movable platen; and correcting the end position of the mold protection zone on the basis of a deviation between the detected position and the reference position.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: July 17, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Takashi Hakoda, Masahiko Miyajima
  • Patent number: 7223093
    Abstract: A screw shaft for driving an injection screw driving body in a motor-driven injection device is coupled to a motor shaft of an electric motor in engagement of splines. A spline for the motor shaft engaging with a spline disposed at the outer periphery at a shaft end of the screw shaft is fitted into a recess formed inside of a motor shaft end. A flange formed around the spline is clamped at end face of the motor shaft via a bolt, and is formed at the inner periphery of a bearing sleeve detachably mounted to the motor shaft. An annular groove is formed at the inner periphery of an opening of the bearing sleeve for the side of the screw shaft. A ring member for air-tightly sealing a clearance formed between the screw shaft and the bearing sleeve is fitted into the annular groove. The spline for the motor shaft engaging with the spline on the screw shaft is disposed at the inner periphery of the bearing sleeve independent of the motor shaft, thus achieving the coupling via the respective splines of the motors.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: May 29, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Kinji Yokoya, Hiroshi Yamaura, Hiroo Okubo
  • Patent number: 7223084
    Abstract: The purpose of the invention is to prevent a sticking of lubricant to a ball screw shaft and a scattering to the circumstance in an electromotive toggle mold clamping device. This invention relates to the electric motor driven toggle mold clamping device wherein a ball nut member is screwed together to the ball screw shaft which rotates by an electric motor to advance and retreat freely and a cross head is fixed to the ball nut member, a cylindrical or polygonal cylindrical member which has a cylindrical body shape or square cylindrical body shape with a length and a size of placing the ball screw shaft with a required gap while retreating the cross head, is attached to the front ends of the cross head concentrically with the ball screw shaft. The ball screw shaft protruding from the cross head is placed in the cylindrical or polygonal cylindrical member having a required gap.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: May 29, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Fumio Shiozawa, Keizou Shimizu
  • Patent number: 7216005
    Abstract: Test molding and mass-production molding are performed by an injection molding machine that includes a control apparatus in which neural networks are used. A quality prediction function determined based on the test molding is revised as necessary during mass-production molding.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: May 8, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Takayoshi Shioiri, Eiki Iwashita, Yoshitoshi Yamagiwa
  • Patent number: 7187644
    Abstract: A method of manufacturing an optical recording substrate, comprising the steps of: contacting the surface having pit or land/grooves of a stamper having the pit or land/grooves to an organic polymer sheet having a glass transition temperature of 120 to 190° C., a single-pass birefringence retardation of +10 nm to ?10 nm and a thickness of 0.35 mm or less under reduced pressure; and thermally pressing them. According to this method, an optical recording substrate which can transfer a stamper pattern to a thin organic polymer sheet easily and thoroughly can be manufactured.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: March 6, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Kazutomi Suzuki, Takashi Tomie, Kiyoto Takizawa, Suinobu Kubota
  • Patent number: 7175408
    Abstract: A mold monitoring apparatus for an injection molding machine captures an image of a cavity portion of an opened mold, and determines the state of the cavity portion by means of image processing. The apparatus includes a light emitting unit, an image capturing unit, and an image processing unit. The light emitting unit projects onto the cavity portion light rays other than visible light rays. The image capturing unit includes an image sensor for capturing reflection light rays that travel from the cavity portion to the image sensor via a filter for blocking visible light rays. The image processing unit determines the state of the cavity portion on the basis of an image signal output from the image sensor and through image processing.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: February 13, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Yoshio Watanabe, Hirokazu Ihara
  • Patent number: 7165599
    Abstract: In a metal molding machine provided having a tilt to a clamping device with an injection unit which is constituted by a liquid metallic material reservoir in which a cylinder having a nozzle portion at the tip portion equipped with a heating device at the outer periphery and an injection plunger having advance or retreat freely in the inside, and the injection cylinder at the rear portion, the metallic material feeding to the above liquid metallic material reservoir is performed in liquid by melt to the temperature of above the liquidus temperature in a melting cylinder standing the liquid metallic material reservoir to liquid metallic material surface from a feeding pipe having a smaller diameter than the inner diameter of the cylinder. The melting and feeding of metallic material is performed at an atmosphere of an inert gas such as argon.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: January 23, 2007
    Assignee: Nissei Plastic Industrial Co., Ltd.
    Inventors: Kiyoto Takizawa, Toshiyasu Koda, Mamoru Miyagawa, Kazuo Anzai, Koji Takei, Ko Yamazaki