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Rapid Prototyping and 3D Printing |
3D digital-massing studies allow architects to use advanced technologies and make physical pro-totypes for demonstration or testing purposes using the 3D printing services that are becoming more affordable. For many architects as well as investors, a physical model is still something they like to have in order to study the design.
Rapid prototyping is the automatic construction of physical objects using solid freeform fabrica-tion. The first techniques for rapid prototyping became available in the 1980s and were used to pro-duce models and prototype parts. Thanks to advanced and affordable technology, professionals in many different fields now rely on rapid prototyping—architects to create models, industrial designers to make first-draft prototypes, and even artists to sculpt complex shapes for fine arts. The process of rapid prototyping takes virtual designs from a CAD model, transforms them into virtual cross sections, and creates each cross section in physical space one after the next until the model is finished. This is often done by layering liquid and powdered material for each section and using glue or a laser; the material is fused together as shown in Figure 7.19. |
Figure 7.19
3D physical models can be printed directly from a digital model. |
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The most common file format for sending this data is .stl. You can 3D-print a Revit model by exporting it first to .dwg and then printing to .stl from 3ds Max, AutoCAD, Inventor, or other soft-ware that supports .stl exporting.
Figure 7.20 shows a rapid prototype model of an unbuilt Louis Kahn building. |
Figure 7.20
Hidden-line view, shaded view, sectional 3D view, and a rapid prototype physical model from the same Revit model |
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