3D structure development using a three-layer self-folding technology

This paper presents the fabrication of self-folding devices with minimal human intervention. The devices utilize two easily obtainable and commercially available materials, namely, PVC shrink wrap (contraction layer) and copper foil tape (structural layer). The self-folding structure uses predefined crease patterns to create mountain and valley folds when subjected to a temperature change (67 degrees C to 91 degrees C). A unique crease pattern is designed through defined gap widths to act as hinges. The fabrication technique involves a rapid proto-typing methodology that employs low-cost materials. The rapid and efficient manufacturing of the self-folding assembly has an advantage over other fabrication techniques that require numerous layers and complex manufacturing steps. As a result, the self-folding technology in this study achieves the 3D transformation of a cubic and pyramid structure from a 2D framework.