The University of Tokyo School of Engineering Issues Press Release on the Value Exchange Engineering Research of Specially-Appointed Associate Professor Dr. Narumi Koya

The University of Tokyo School of Engineering issued a press release today on research into “Inkjet 4D Print.” The research project is headed by Dr. Narumi Koya, a specially-appointed associate professor who belongs to the collaborative research division “Value Exchange Engineering,” which is associated with both Mercari R4D and Research Institute for an Inclusive Society through Engineering (RIISE).

University of Tokyo School of Engineering Press Release—July 24, 2023

Origami Sheets That Take 3D Shapes Automatically—Patterns Printed Using Ink Jet Printers Fold Transform Automatically When Heat Is Applied

Key points of this research

• Researchers have developed technology for automatically folding origami with a resolution that is more than 1,200 times more detailed than existing self-folding technology (roughly 100 automatically folding lines and surfaces) and that has over 100,000 folds and several tens of thousands of surfaces.
• The technology is a global first in terms of the complexity of origami design and manufacturing methods for folding given 3D shapes.
• This technology can be applied with a generic UV printer and heat-shrinkable sheets.
• The research is gaining attention from a materials and shipping perspective as the next generation of environmentally friendly fabrication technology.

Future Outlook

Compared to simple 3D printing, this method of creation saves time by allowing items printed in 2D to take shape as 3D objects. Without the need for supporting materials, the burden on the environment is also small. Moreover, printed materials can be stored and transported in their pre-transformation form, which allows for space-saving as well. In other words, this creation method presents the possibility of being able to form the various 3D objects around us using a 2D printing method that is environmentally friendly. What’s more, in an upcoming demonstration, we anticipate seeing objects take shape in outer space, an environment where folding by hand is challenging. The research group has established this technology as a new form of manufacturing method and anticipates seeing it leveraged in various industries and designs.

（Referenced: Press release）

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