Fast automatic molding (Rapid Prototyping) technology developed in recent years produced directly from CAD model with sample or part of the general term for group technology, which integrates CAD, Roll former  numerical control technology. Laser technology and materials technology, modern science and technology: advanced manufacturing technology is an important part. And traditional manufacturing methods, rapid prototyping from CAD geometric models of parts starting with software and CNC forming discrete hierarchical systems, with a laser beam or other means of material accumulation to form solid parts. Because of its manufacture of complex three-dimensional into a two-dimensional manufacturing of superposition, and therefore can not die and tools generated in almost any of the conditions of complex components, greatly improved production efficiency and manufacturing flexibility.

    Advent of rapid prototyping technology automatically less than a decade, has achieved considerable market developed rapidly. People on the material layer by layer addition method to this new manufacturing method has gradually adapted. Manufacturing sector staff find ways to use this modern means of technology convergence with traditional manufacturing work smoothly. People with its total length to avoid short, the extraordinary efficiency. And CNC machining, casting, metal spray, silicone mold with the manufacturing Roll forming methods, rapid prototyping has become a modern automatic models, molds and parts manufacturing powerful tool in the aerospace, auto, home appliances, has been widely used.

    Rapid prototyping process is to first generate a product of three-dimensional CAD solid model or surface model file, convert it into a STL file format, then a software from the STL file "cut" (Slice) set out a series of film layer thickness , or directly from the CAD file cut a series of layers, these layers built up in order, is still designed to shape parts. Then, a layer of each of the above information spread quickly to the automatic molding machine, similar to the computer to print to the printer pass information to add method using materials made out of each layer in turn will link to each floor at the same time, until the completion of the parts. Therefore, the fast automatic molding can be defined as a way to store any three-dimensional computer-based body of information directly through the material layer by layer addition method created, without the need for special tooling, tools, or artificial interference in the new manufacturing technology.

    Rapid prototyping technology compared with traditional methods and characteristics unique advantages:

    (1) manufacturing process is almost nothing to do with the complexity of the parts can be freely manufactured (Free FormFabrication), which is unmatched by traditional methods.
Roll forming machine
    (2) products are priced almost nothing to do with the volume, especially for new product development and single and small batch production parts.

    (3) The process by way of non-contact, no tool replacement and wear the type of problems, can be unattended without machining expertise can operate.

    (4) No cutting, noise and vibration, etc., conducive to environmental protection.

    (5) the entire digital production process, and the CAD model is directly related, part big or small, WYSIWYG, can be modified at any time, at any time manufacture.

    (6) combined with traditional methods can achieve rapid casting, rapid tooling and small batch parts production and other functions, the traditional manufacturing methods to inject new vitality. Light-cured stereolithography (SL-Stereolithography)

    The technology for photosensitive resins, the computer controlled UV laser cross-section scheduled hierarchical outline of the various parts for the track point by point scanning of the liquid resin so that the scanned area of the resin layer to generate light polymerization, to form parts a thin section. When the layer of curing is completed, move the table, in the original surface and then cured resin good Rubbing a new layer of liquid resin in order to scan the next layer of curing. The new curing adhesive layer firmly on the first floor, so repeat until the completion of the entire part prototyping.

    SL method is the first commercial application of RP technology. The current SL equipment worldwide sales of approximately 70% of the total number of RP equipment around. This approach is characterized by high precision, good surface quality. Nearly 100% utilization of raw materials, particularly complex shapes to be created (such as the hollow part), especially fine (such as jewelry, handicrafts, etc.) components.