Rapid prototype modelling

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. 

Fig. 7.5 Staircase effect left) Reprinted from International Journal of Machine Tools and Manufacture, Vol. 44, K. Thrimurthulu, Pulak M. Pandey, N. Venkata Reddy, Optimum part deposition orientation in fused deposition modelling, 585-594, Copyright (2004) with permission from Elsevier, and micrograph of 3D printed part with layer thickness of 0.25 mm (right) Reprinted from Computer-Aided Design, Vol. 34, R. I. Campbell, M. Martorelli, H.S. Lee, Siuface roughness visualisation for rapid prototyping models, 717-725, Copyright (2002) with permission from Elsevier...

Rapid prototype modelling permits varied configurations to be tested over comparatively short timescales. This technique permits feedback from subject matter experts to be incorporated into the model, and assessed promptly, before possible inclusion into the design. 

A prototype is a 3-D model suitable for use in the preliminary testing and evaluation of a product (also used for modeling a die, mold and other tool). It provides a means to evaluate the product s performances before going into production. The ideal situation is for the prototype to be the actual product made in production. However machining stock material and using rapid prototype techniques can make prototypes (Chapter 4, BOOK SHELVES). 

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. 

Previously, we developed a prototype model of automated 2DE system which enabled rapid, highly reproducible, and required minimal maintenance (6). All the 2DE procedures including lEF, on-part protein staining, SDS-PAGE, and in situ protein detection were automatically completed. The system completed the entire process within 1.5 h. Recently, an improved model of this system was capable of reliability y and portability, e.g., operational stabilities in both componentry and software, and miniaturization of whole apparatus. Followings are described system components, operational procedure, and data analysis of this 2DE system in a hands-on form. 

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... 

The composite was used for fused deposition modelling (FDM). FDM is a filament based rapid prototyping system (80). The application of FDM demands that the material can be made in feedstock filament form. 

Rapid Prototyping System Produces Models with Improved Resolution, MP, Sep. 2002. 

The value of rapid prototyping comes in when you need to dramatically reduce the time and expense involved in making a model of your innovation so it can be assessed and optimized by designers and manufacturing engineers before it goes into production. As well, rapid prototypes are also used by marketing and sales professionals to test and anticipate customer reaction. 

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. 

Zhao et al. (2001) examined a model for computing the electromagnetic field and power-density distribution in a cavity, and their effects on cure of a thin epoxy-resin layer during a novel microwave rapid-prototyping process. 

Another life cycle often used in today s Windows oriented graphical environment is the spiral model, illustrated in Figure 15.4. This model, appropriate to rapid prototyping or other forms of inaemental development, acknowledges the use of the graphical Rapid Application Development (RAD) tools mentioned above. However, it brings them into a controlled framework so that the traditional benefits of the life cycle can be combined with the speed of development—the best of both worlds. 

In addition to the conventional manufacturing of physictil prototypes (e.g., CNC milling) the rapid prototype technologies (RPT) are gaining more and more importance. RPT makes it possible to produce a physical artifact directly from its CAD model without any tools. Thus, it is possible to build the prototype of a complex part within a few days rather than the several weeks it would take... 

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-... 

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