成果報告書詳細
管理番号20150000000443
タイトル*平成26年度中間年報 SIP(戦略的イノベーション創造プログラム) 革新的設計生産技術 フルイディック材料創製と3Dプリンティングによる構造化機能材料・デバイスの迅速開発(4)
公開日2015/7/18
報告書年度2014 - 2014
委託先名東芝テック株式会社
プロジェクト番号P14030
部署名ロボット・機械システム部
和文要約
英文要約Title:Prompt development of functional materials and devices by creation of fluidic materials and 3D additive manufacturing(FY2014-FY2015)FY2014 Annual Report

This is to present subject matters pertaining to Toshiba TEC in this fiscal year, which include ink evaluation, printhead design, ink circulation system and inkjet control device. Ink evaluation refers to the measurement of physical properties and the evaluation of material compatibility. The information of the measured physical properties, such as viscosity, surface tension, etc., is shared with DIC, who is responsible for ink development. As for material compatibility, testing method has been considered and the evaluation of solvent has commenced. This is performed by wetting inkjet device components with solvent for up to 3 months, and changes in component weight and solvent viscosity are identified. For printhead design, fluid simulation is required in order to determine the controlling condition for proper ejection of inks with different physical properties, e.g. ink for dentures and Li battery. Lately, a fluid analysis software "FLOW-3D" has been introduced. For the software operation, hardware and OS selections have been performed, while the workplace layout has been improved. Due to the usage of highly-concentrated ink with high density, ink circulation is required to avoid sedimentation. While ink resistance is requisite for components in contact with ink in the device, material properties are also important. From both perspectives, a few candidate pumps have been selected and bought in this fiscal term. An explanation about the ink circulation system has been presented to Panasonic's representative in charge of the R&D of the 3D printing system equipped with ink circulation system. This is to ensure sufficient space to be allocated for the ink circulation system in printer design. As for printhead control device, control board that converts the input signal to printhead signal is essential for driving printhead. Discussions have been carried out with Panasonic, and the arrangement of control board has been performed. In terms of printhead design, information gathering has been conducted toward designing new driver circuit. It is envisaged that the driving voltage of inkjet printhead will become higher due to the usage of ink with higher functionality and viscosity. By studying viable manufacturing processes, foundries capable of manufacturing printhead of higher driving voltage have been refined. Also regarding ink evaluation, a measurement system has been developed by designing fixtures that could measure important ink properties during ink ejection process. Furthermore, a list of vibrating elements and electronic equipment has been prepared based on literature research. Lastly, in order to manifest the measurement methods and instruments for analyzing defects occurred during the manufacturing process of inkjet printhead, subjects to be analyzed using failure mode analysis have been identified. The utilization of Raman spectroscopy, FE-SEM, TEM, XPS, AFM, FIB, etc., in Hosei University is considered.
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