Magnetic Thimble

thingiverse

This custom tool was designed for a patient who had lost his index, middle and ring fingers on one hand, but still had the first phalanx of his thumb and pinky finger intact (see photos). With this specialized grip, he's able to perform precision grasping and hold small objects like nails or screws with ease. The thimble features a durable PLA framework, a flexible silicone body, and a strong magnet for secure attachment. The silicone body is carefully crafted by pouring it into a custom mold (see photos). A unique circular pattern on the framework ensures a snug fit between the silicone and the metal structure, while an extended protrusion prevents thumb hyperflexion. A fluted mold design allows for better suspension over the patient's stump. This innovative tool was created as part of a project by the Direction of Innovation and Development at Mutual de Seguridad C.Ch.C in Chile, in collaboration with the Neuro Rehabilitation Institute. Print Settings: Printer Brand: Leapfrog Printer: Creatr XL Rafts: Yes Supports: Yes Resolution: 0.2mm Infill: 15% Post-Printing Process: The custom socket is made from 3D printed polylactic acid (PLA) for the molds and internal structure, combined with silicone elastomer (25A Shore). To create it, the process starts by pouring silicone into a mold that fits around the exterior of the socket. Then, an inside structure with a magnet on its tip is embedded in the silicone, followed by the finger-shaped mold being closed over it. The silicone is left to cure at room temperature for 40 minutes before the molds are removed and the finished socket is ready. To ensure easy release from the mold, moisturizing cream can be used as a mold release agent.