著者

太田 崇文 岡田 耕治 齊藤 梓 吉田 一也 村澤 剛 川上 勝 古川 英光

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.850, pp.16-00567, 2017 (Released:2017-06-25)

参考文献数

15

被引用文献数

2 4

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In this work, we present a comparison of the mechanical properties of 3D printed structures with respect to the printing orientation for 3D gel printer "SWIM-ER" and FDM (Fused Deposition Modeling) 3D printer with a result that the fracture surface of the 3D modeled object of the gel does not break along the stacked line, and the maximum stress at that time is the breaking strength. Also, the fracture surface of the 3D model of the ABS resin has broken along the stacked line other than 0 degrees, and the maximum stress at that time is the peel strength. The yield point can be observed at the 0 degree specimen, the maximum stress at that time is tensile strength. Moreover, while comparing both materials, we observed that the dependency in the stacking direction is weak in the 3D model of the gel, strong in the 3D modeled material of the ABS resin, and the dependence on the stacking direction is strongly influenced by the way of bonding the materials in stacking.

著者

岡田 耕治 渡邉 洋輔 齊藤 梓 川上 勝 古川 英光

出版者

合成樹脂工業協会

雑誌

ネットワークポリマー (ISSN:13420577)

巻号頁・発行日

vol.37, no.2, pp.81-87, 2016-03-10 (Released:2016-05-27)

参考文献数

16

被引用文献数

1

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3D プリンターが,「材料に合わせた方式でユーザーが設計した通りの構造物を造形する新たなツール」として注目され始めてからはや数年。この3D プリンターブームは,熱溶解積層法の特許失効による開発コストの低減,3D ソフトウェアのフリー化,インターネットによる情報の共有化が背景にあり,いまや個人レベルでのモノづくりを可能にした。一方,全く別の経緯で同時期に,著者らは3D ゲルプリンターを開発に着手しており,数百 μm オーダーで柔らかくて潤いのあるゲルの三次元造形に成功している。本稿では,従来の3D プリンターで使 用される樹脂や金属,セラミックなどドライマテリアルにはないゲルの優位性と,その特徴を生かしたゲル造形物の将来性,開発の経緯の一つである高強度ゲルの登場を述べながら,実際の造形方法・造形例について紹介する。既存の3D プリンターによるモノづくり革命をさらに加速するツールの一つとして,3D ゲルプリンターが活躍する日は近い。

著者

滝島 勇希 吉田 一也 齊藤 梓 川上 勝 古川 英光

出版者

一般社団法人 日本機械学会

雑誌

機械材料・材料加工技術講演会講演論文集 2018.26 (ISSN:2424287X)

巻号頁・発行日

pp.403, 2018 (Released:2019-05-25)

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Various kinds of underwater exploration techniques have been developed. For instance, submersible research vehicles and autonomous underwater vehicle (AUV) have been used for observation of underwater conditions, in addition to the technique of fixed-point observation. However, such research vehicles and conventional AUV are difficult to control, are expensive, and are usually made with non-biodegradable materials such as metals. In contrast, jellyfish is the most efficient swimmers, traveling for long distance with saving energy by drifting in the ocean, its body can be decomposed after death, and safe for surrounding creatures. Therefore, we are developing the jellyfish-mimic AUV using a hydrogel. For designing a Jellyfish-mimic AUV robot, it is preferable to introduce a soft actuator driven by water pressure, as it requires low electric power and it is eco-friendly. In this study, we prototyped a Jellyfish-AUV robot using a soft material and a soft actuator. While it is ideal to make a robot body with hydrogel it is difficult to make the actuator with hydrogel.

著者

田勢 泰士 齊藤 梓 太田 崇文 佐藤 慧 高松 久一郎 吉田 一也 川上 勝 古川 英光

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.84, no.858, pp.17-00459-17-00459, 2018 (Released:2018-02-25)

参考文献数

14

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Our group has developed a 3D gel printer called "SWIM - ER" (Soft and Wet Industrial Material - Easy Realizer). Here we are aiming to improve the gel material used in the SWIM-ER system for problems related to free forming and mechanical strength. The composition of the high strength gel material with low viscosity and easy modeling was clarified by adjusting the concentration of the crosslinking agent of 1st gel against the problem that the viscosity of the material is too high and it was difficult to shape. We tried tear tests in addition to various evaluation tests, tensile tests, compression tests. We thought that we can estimate and evaluate dissipation and diffusion of fracture energy by microscopic observation of specimens after tear tests.

著者

田勢 泰士 太田 崇文 岡田 耕治 高松 久一郎 齊藤 梓 川上 勝 古川 英光

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.849, pp.17-00003-17-00003, 2017 (Released:2017-05-25)

参考文献数

14

被引用文献数

3

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Recently our group developed 3D gel printer named “SWIM-ER” (soft and wet industrial material - easy realizer). Here we aim to improve the gel materials used for SWIM-ER system about the problems around free-shaping, transparency, and mechanical strength. To overcome these problems, we tried to use UV absorbers, AS150 (Nippon Kayaku Co.,Ltd.) and KEMISORB11S (CHEMIPRO KASEI Co.,Ltd.) and found the latter absorber kept transparency well. We improved the maximum tensile stress about 2 times and the maximum tensile strain about 4 times by changing the kind of cross-linker from methylene bis-acrylamide (MBAA) type to diethylene glycol dimethacrylate (DEGDMA) type. We also found that the maximum tensile stress was improved about 1.3 times by changing the blend ratio of 1st gel powder and 2nd gel solution in the preparation of particle-double network gels (P-DN gel). Based on these two improvements, we 3D-printed the transparent and hollow structure of the high strength gels with the maximum tensile stress of 0.5 MPa, which will be comparable to the maximum tensile stress of living organs like the stomach and small intestine in our body.