AccordionFabは、一般的なレーザーカッタを用いて、多層インフレータブル構造を高速に試作する手法である。樹脂シートの下に耐熱紙を挟み、レーザー光を焦点をずらして照射し、2枚のシートを溶接してインフレータブル構造を加工する。レンズと加工物の間の距離を調整し、多層構造物の厚みや曲げ角度をデザインできる手法を開発した。本手法を用い、身体にフィットする家具や梱包容器などの試作を行なっている。

We proposed a method to create 3D inflatable objects by laminating plastic layers. AccordionFab is a fabrication method in which the user can prototype multi-layered inflatable structures rapidly with a common laser cutter. Our key finding is that it is possible to selectively weld the two uppermost plastic sheets out of the stacked sheets by defocusing the laser and inserting the heat-resistant paper below the desired welding layer. As the contribution of our research, we investigated the optimal distance between the lens and the workpiece for cutting and welding and developed an attachment that supports welding process. Next, we developed a mechanism of changing the thickness and bending angle of multi-layered objects and created a simulation software. Using these techniques, the user can create various prototypes such as personal furniture that fits the user’s body and packing containers that fit the contents.

Junichi Yamaoka, Kazunori Nozawa, Shion Asada, Ryuma Niiyama, Yoshihiro Kawahara, Yasuaki Kakehi

Contact: yamajun@iii.u-tokyo.ac.jp