Search Results 1-20 of 71

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  • Durability evaluation of thin film at high temperature  [in Japanese]

    伊藤 寛明 , 長 秀雄

    Abrasive technology : 砥粒加工学会誌 : journal of the Japan Society for Abrasive Technology 63(3), 124-127, 2019-03

  • Restraint of Voids Generated Inside Injection Molded Products by In-Mold Pressing Method

    Motegi Atsushi , Hishida Tomohiro , Murata Yasuhiko

    … <p>In recent years, long glass fiber reinforced plastic and carbon fiber reinforced plastic have begun to be used for structural components that require high strength. … However, defects, known as voids, are generated inside the molded product and decrease the strength of the molded product, posing a significant problem at molding production sites. …

    International Journal of Automation Technology 12(6), 930-939, 2018

    J-STAGE 

  • Evaluation of Mechanical Properties of Glass Fiber Reinforced Polypropylene Composites Made by Press and Injection Hybrid Molding  [in Japanese]

    TANAKA Kazuto , NOGUCHI Ryuichi , KATAYAMA Tsutao

    … <p>In the press and injection hybrid molding of GFRTP, short or long fiber reinforced thermoplastics or thermoplastics are injected on the continuous fiber reinforced thermoplastics, which allows us to obtain light weight structures with excellent strength and stiffness. … For the injection molding, forming a V-shaped interface by moving the melted resin was reported to improve the weld strength. …

    Journal of the Society of Materials Science, Japan 67(1), 107-113, 2018

    J-STAGE 

  • NUMERICAL SIMULATION OF PRESS MOLDING FOR GLASS ASPHERICAL LENS  [in Japanese]

    伊藤 寛明 , 荒井 政大 , 木村 皇輝 , 柴原 直幸

    計算数理工学論文集 17, 19-24, 2017-12

  • Development of an Injection Mold Capable of Melt Flow Control and Induction Heating and Cooling

    Murata Yasuhiko , Suzuki Hidekazu , Kashiwagi Shogo

    … <p>Weldlines are a type of defect in polymer injection molding and are known to impair the appearance and mechanical strength of the molded product. … Although it is possible to prevent impairment of the external appearance caused by weldlines or the exposure of glass fibers on the surface when the mold is applied to glass fiber reinforced thermoplastic, the results of the previous study indicated that it did not significantly improve the mechanical strength. …

    International Journal of Automation Technology 11(6), 985-992, 2017

    J-STAGE 

  • Development of a corrosion-resistant light-weight faster by fiber hybrid resin rivet  [in Japanese]

    IIZUKA Keisuke , UI Naoya , UEDA Masahito , OHTANI Akio

    … <p>The corrosion-resistant light-weight faster was developed using carbon fiber reinforced thermoplastic (CFRTP) and glass fiber reinforced thermoplastic (GFRTP). … Two commingled yarns were made using carbon fiber and PA66 fiber (CF/PA66 yarn), and glass fiber and PA66 fiber (GF/PA66 yarn), respectively. … Quasi-isotropic carbon fiber reinforced thermoset plastic (CFRP) laminates were joined by the rivet by hot press molding method. …

    The Proceedings of Mechanical Engineering Congress, Japan 2017(0), J0440104, 2017

    J-STAGE 

  • Evaluation of strength of DLC films at high temperature by static and cyclic indentation test with AE technique  [in Japanese]

    YOKOYAMA Kensuke , ITO Hiroaki , NISHIMIYA Kojiro , CHO Hideo

    … <p>This study aims to evaluate strength of a diamond-like carbon (DLC) film on a metal for glass press molding at high temperature. …

    Transactions of the JSME (in Japanese) 83(852), 17-00213-17-00213, 2017

    J-STAGE 

  • Evaluation of Thermo-Viscoelastic Property of Glass by Dynamic Mechanical Analysis Using a Thermomechanical Analyzer  [in Japanese]

    ITO Hiroaki , HIMENO Nobuya , CHO Hideo , ARAI Masahiro

    … In this study, a dynamic mechanical analysis (DMA) using a thermomechanical analyzer was applied to determine the thermo-viscoelastic properties (shift factors and a master curve) of a borosilicate glass (IWAKI<sub>TE-32</sub>) under various frequencies and temperatures. … The shift factors and master curve in the glass sample were derived using datasets of the storage elastic moduli. … The shift factors for the glass obtained by DMA test agreed well with those by a static creep test. …

    Journal of the Japanese Society for Experimental Mechanics 17(2), 109-116, 2017

    J-STAGE 

  • Tutorials Experimental Techniques : Glass Molding Press Process  [in Japanese]

    伊藤 寛明

    実験力学 : Journal of JSEM : Journal of the Japan Society for Experimental Mechanics 16(4), 348-350, 2016-12

  • Damage Evaluation of DLC Film for Die Mold Releasing by Thermal Shock Test  [in Japanese]

    ITO Hiroaki , OI Seiji , CHO Hideo

    … To imitate a practical glass press molding process, DLC specimen was vacuum-encapsulated with a glass tube, and then they were heated up to 610oC using the electric furnace and were quenched to 20oC in water. …

    The Proceedings of the Materials and Mechanics Conference 2016(0), OS13-01, 2016

    J-STAGE 

  • Evaluation of adhesion quality of DLC film by the indentation test with AE technique under high temperature environment.  [in Japanese]

    YOKOYAMA Kensuke , ITO Hiroaki , CHO Hideo

    … <p>This study aims to evaluate strength and adhesion quality of a diamond-like carbon (DLC) film on a metal for glass press molding in high temperature. …

    The Proceedings of Mechanical Engineering Congress, Japan 2016(0), J0420404, 2016

    J-STAGE 

  • Evaluation of Thermo-Viscoelastic Property of Glass by Dynamic Mechanical Analysis  [in Japanese]

    姫野 暢哉 , 伊藤 寛明 , 長 秀雄

    日本実験力学会講演論文集 : 年次講演会 = Proceedings of JSEM : annual Conference on Experimental Mechanics (15), 205-209, 2015

  • Hot press fabrication of hemisphere shell product made of bamboo fibers extracted with a machining center

    HIROGAKI Toshiki , AOYAMA Eiichi , HUYNH Minh , NAKAMURA Yusuke , OGAWA Keiji , NOBE Hiromichi

    … In our research work, we are focusing on bamboo due to its advantages of fast growth, renewability, flexibility, low cost, and high specific strength and stiffness which can be frequently compared with glass fiber. … We have proposed a novel hot press fabrication method of binder-free green composite products made of bamboo fibers extracted by end-milling with a machining center. …

    Journal of Advanced Mechanical Design, Systems, and Manufacturing 9(3), JAMDSM0044-JAMDSM0044, 2015

    J-STAGE 

  • OS1002-459 Determination of the Dynamic Viscoelasticity of a Glass Using Thermomechanical Analyzer  [in Japanese]

    ITO Hiroaki , HIMENO Nobuya , CHO Hideo

    … In this study, to determine the thermo-viscoelastic properties (shift factors and a master curve) of a borosilicate glass (IWAKI_<TE-32>), dynamic mechanical analysis (DMA) using a thermomechanical analyzer were carried out under various frequencies and temperatures. … However, the storage elastic moduli estimated by DMA was much smaller than reported glass Young's modulus of 61GPa. …

    The Proceedings of the Materials and Mechanics Conference 2015(0), _OS1002-45-_OS1002-45, 2015

    J-STAGE 

  • P-32 Study of carbon-nanotube- and chitosan-fiber/polyurethan composite materials with shape-memory effect  [in Japanese]

    Kawaguchi K , Iijima M , Murakami T , Muguruma T , Endo K

    … In this study, multi-walled carbon nanotube (MWNT) and chitosan fiber (BiNFI-s)-based polyurethane composite materials were experimentally prepared by heat press molding method, and their mechanical properties and shape memory effect were investigated. … By addition of the MWNT and BiNFL-s into polyurethane, the glass transition temperature (T_g) of each specimen decreased and the Vickers hardness values significantly increased. …

    The journal of the Japanese Society for Dental Materials and Devices 33(5), 418, 2014-09-20

    Ichushi Web 

  • High performance films of cellulose butyral derivative having a necklace-like annular structure in the side chains

    Chang Chunyu , Teramoto Yoshikuni , Nishio Yoshiyuki

    … Both DHPC and CB products were easily processed into a thin film by hot-press molding. … The CB films exhibited excellent optical transparency and a good adhesive property to glass plates. …

    Polymer 55(16), 3944-3950, 2014-08-05

    IR 

  • Evaluation of Optimal Condition for Press Molding of Glass Lens  [in Japanese]

    ITO Hiroaki , ARAI Masahiro , KIMURA Kohki , SHIBAHARA Naoyuki

    … Some experiments for press molding of glass spherical lens and its numerical simulation were carried out using finite element method. … The optimal molding condition of slow cooling time that gives appropriate transcription profile was examined experimentally. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 79(807), 1685-1689, 2013

    J-STAGE 

  • OS0312 Numerical Simulation of Press Molding for Glass Lens  [in Japanese]

    KIMURA Koki , SHIBAHARA Naoyuki , ITO Hiroaki , ARAI Masahiro

    … In this paper, the numerical simultion about press molding of glass lens using the finite element method is investigated. … Thermo-viscoelastic properties of the glass were estimated using undirectional compression creep test based on traditional thermoviscoelastic theory. …

    The Proceedings of the Materials and Mechanics Conference 2013(0), _OS0312-1_-_OS0312-2_, 2013

    J-STAGE 

  • 609 Evaluation of Optimal Condition for Press Molding of Glass Lens  [in Japanese]

    ITO Hiroaki , ARAI Masahiro , KIMURA Kohki , SHIBAHARA Naoyuki

    … experiments for press molding of glass spherical lens and its numerical simulation using finite element method were earned out The optimal molding condition of slow cooling time that gives appropriate transcription profile of the sphencal lens was investigated by the experimental tests Moreover, in order to investigate the temperature and internal stress distributions, numerical simulation was earned out using universal FEM program As a result of comparing experimental …

    The Proceedings of the Materials and processing conference 2013.21(0), _609-1_-_609-5_, 2013

    J-STAGE 

  • J045092 Measurement of Cure Index, Voids and Strain of GFRP Laminates During Molding  [in Japanese]

    KAJIKAWA Takuya , KOSAKA Tatsuro , KUSUKAWA Kazuhiro

    … In the present study, we propose a system for monitoring cure process of FRP prepregs during hot-press molding using dual light sources, FBG sensors and refractive-index sensors. … The FBG sensors have a distal end at which Fresnel's reflection between glass and resin occurs. …

    The Proceedings of Mechanical Engineering Congress, Japan 2013(0), _J045092-1-_J045092-5, 2013

    J-STAGE 

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