成果報告書詳細
管理番号20150000000428
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 リアクティブ3Dプリンタによるテーラーメイドラバー製品の設計生産と社会経済的な価値共創に関する研究開発(2)
公開日2015/7/18
報告書年度2014 - 2014
委託先名兵庫県立工業技術センター
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1. Interactive Design
Interactive design is indispensable for involving user’s participation to produce tailor-made shoes. For this purpose, we have developed two new plans of the interactive design: the first one is to design shoes and the second is to improve personal delight during use of the shoes.
It is the most significant for shoes design that they fit one’s feet in ergonomics. Recently, three-dimensional scanners are available for measuring user’s feet in research centers or some shops. In this study, however, we use a smart phone to measure user’s feet by taking photos of their own feet instead of three-dimensional scanners or shoe fitters. We have made a conceptual design for graphical user interface which enables users to take proper photos with their smart phones. The data are sent to the producer through the internet. Users have benefit to know which types of shoes are suitable.
We think that the relation between users and producers should be continued after the production of tailor-made shoes. We have developed another conceptual design of the application which uses a smart phone’s camera as a recording device to collect shoe photo data after using some periods of time. User’s way of walking and running can be visualized by ‘reverse engineering’ of the collected photo data to the initial CAD data with an aid of a musculoskeletal simulation system.

2. Investigation on rubber compounds suitable for 3D printing
To improve fluidity of unvulcanized rubber compounds, we have investigated effects of additives such as a liquid processing aid or liquid rubbers on viscosities of acrylonitrile- butadiene rubber (NBR) or natural rubber (NR) compounds. Fluidity tests were carried out at 80, 100 or 120 degrees Celsius using a capillary rheometer. In low shear rate regions, viscosities of NR compounds containing 10 phr liquid processing aid were not affected by temperature, while they were decreased with temperature in high shear rate regions. In contrast, the viscosities of NBR compounds containing 10 phr liquid processing aid were decreased with temperature in low shear rate regions, but they were not affected by temperature in high shear rate regions.
As it is expected that fluidity of unvulcanized rubber compounds is lowered by mixing liquid rubbers into the compounds, four kinds of liquid rubbers, butadiene rubber (BR), low viscosity type isoprene rubber (IR), high viscosity type IR and ethylene-propylene rubber (EPDM) were tested in this study. Unvulcanized rubber compounds containing each liquid rubber had about the same viscosity, which was much lower than that of base NR or NBR. Though tensile strength of the compounds was decreased with increasing liquid rubber content, the decrease of the tensile property was somewhat constricted by the addition of high viscosity type IR. The above results revealed that fluidity of the unvulcanized rubber compounds was improved by the addition of a liquid processing aid and high viscosity type IR.
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