Prototyping modeling, stereolithography

Rapid Prototyping Model of Power Saw Cabinet Part as seen in Figures 6 and 7. Using the Stereolithography technique the part was modelled from a polymere. 

Rapid prototyping or stereolithography or three-dimensional object curing is a photochemical process used to produce solid three-dimensional objects, such as models, masters, or patterns with any shape directly from a design. 

Rapid prototyping (or stereolithography or 3D object curing) is a photochemical process used to produce solid 3D objects such as models, masters or patterns of any shape, directly from a design generated on a computer. The computer is used to control the illumination system that builds up the object, usually by a rapid polymerization process. An important part of the design is that the object is sectioned... 

Rapid prototyping through stereolithography (STL) or other processes needs special shape information in the form of layers. The boundary of the shape of the part is processed by special methods, such as approximation by triangles. Control equipment for rapid prototyping receives geometry in standard STL format. The part model is translated into STL. All geometric... 

Methods are used to produce the more costly rapid prototypes include those that produce models within a few hours. They include photopolymerization, laser tooling, and their modifications. The laser sintering process uses powdered TP rather than chemically reactive liquid photopolymer used in stereolithography. Models are usually made from certain types of plastics. Also used in the different processes are metals (steel, hard alloys, copper-based alloys, and powdered metals). With powder metal molds, they can be used as inserts in a mold ready to produce prototype products. These systems enable having precise control over the process and constructing products with complex geometries. 

While there are many choices and options for engaging in rapid prototyping, we ll cover the basic steps involved in stereolithography—an additive technique by which plastic models are built thin layer upon thin layer, resulting in a three-dimensional prototype created by a machine with very little human involvement. 

Generally speaking, the stereolithography process works by building the prototype, layer by layer, using a laser beam that solidifies each slice of the model until it is complete. As the model is created, multiple horizontal slices are stacked on top of each other until the model is complete. Most... 

The thicker your stereolithography iayers are the iess accurate your prototype will be, and the less time it will take to build. Thinner layers create a smoother, more accurate model, but it takes a longer time to complete the process. 

Stereolithography is a technique widely adopted in industry in conjunction with computer-aided design, CAD, and computer-aided manufacturing, CAM, i.e. micromachining [32, 37, 38]. Stereolithography allows the fabrication of solid, plastic, three-dimensional (3-D) prototypes or models of products and devices from CAD drawings in a matter of hours. Rapid prototyping by means of stereo-... 

Duplication of prototype master models (made by special techniques such as laser stereolithography, laser powder sintering, LOM etc.) in polyurethane or epoxy resins by the vacuum casting process within the scope of rapid prototyping . 

Laser-based generative processes such as stereolithography and selective laser sintering are part of a group of techniques commonly known as layered manufacturing . These are rapid prototyping techniques that build up a 3D object (or physical model) layer by layer. They are used in fields like mechanical engineering, and more recently in medicine and health care, as they are fast and cost effective techniques for the manufacture of 3D parts. 

For a long time, it was considered that the engineered product in the CAD system was sufficient enough to evaluate the design. However, the visualization of data in the form of a cubing model, or using stereolithography or a prototype mold which is preceded by a series mold, has proved to be successful. 

For more complex product identifications, it happens that the described methods for visualization can be appiied together, e.g., a cubing model defines the design, the future prototype part defines the functionaiity, and the complete installation defines a product structure using additional stereolithography parts. 

Stereolithography, a new technique for prototyping products, is currently used for modeling and is envisioned as a production... 

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