Rapid Prototyping using CAD/CAM

Question	Answer
The need for manufacturing industries to cut down on the time and costs involved in developing a new product has led to the development of rapid prototyping (RPT). This involves the creating of 3D objects using laser technology to solidify liquid plastic polymers or resins in a process called stereo-lithography.	2D CAD drawings are converted into 3D models using Rapid Prototyping. The process is based on the computer slicing the 3D object into hundreds of very thin layers and transferring the data from each layer to the laser.
The laser draws the first layer of the shape on to the surface with resin, which causes it to solidify. This process of drawing, solidifying and moving down quickly builds up one layer on top of another until the final 3D design is complete.	Image: 3d_printer.gif (image/gif)
the main disadvantage of RPT with stereo-lithography is the cost. Although the cost of each model to be manufactured is determined by a number factors including size and complexity.	Advantages of RPT: Fast entry to marketplace due to reduced lead-time between design concept and the reality of components reaching market or approval. Produces very complex and intricate shapes directly from CAD data. Reduces development time and therefore saves money. Accurate prototyping, as computer design data is replicated in detail, so complex shaped are easily produced. *Accurate testing, as materials in the model are more representative of the final product.

Resource summary

	Created by Poppy Venables about 11 years ago