字幕表 動画を再生する 英語字幕をプリント 3D printing is the process of making a three-dimensional solid object from a digital model. 3D printing, or additive manufacture, is where layer upon layer of material is built up to make an object. The beauty of this technique is that almost any shape can be created in this way. So, how do you actually print something in 3D? There’s a few stages that a project will need to go through. First, a design for the object needs to be completed. This computer generated model is sliced into cross-sections for the printer to use as a guideline. The next step is printing the object. The 3D printer reads the blueprint and lays down successive layers of material to build the model. A diverse range of materials can be used such as plastics, metal, paper and ceramic. As each layer is printed, it sticks to the previous one to create a cohesive final shape. 3D printers are capable of printing complex layers that can form moving parts, like hinges and wheels, as part of the same object. You could build a bicycle - with handlebars, frame, wheels - readily assembled, without the need for any tools. You just have to leave gaps in the right spots. 3D printing is used across a variety of industries such as high-end manufacture, where it’s used for rapid prototyping and research. This allows designers and concept developers the flexibility to produce parts and models on demand. They are then able to modify these as required. And finally, 3D printing is pushing healthcare into new areas. It’s being used to make medical parts such as custom hearing aids and braces and even to reproduce body parts like customised hip implants or prosthetic hands in exact proportions to fit the patient.