Introduction:
SLA (Stereolithography) technology (also known as stereolithography technology) is a work based on the principle of liquid photosensitive resin photopolymerization. This liquid material can be quickly under certain wavelength and intensity of ultraviolet light (e.g., λ = 325nm) irradiation light polymerization occurs, the molecular weight increases sharply, the material will change from liquid to a solid. Its core technology is the computer technology and materials technology. Laser molding technology to abandon the traditional method of machining the material by the laser beam deposited to form part of the information generated by the CAD part geometry, control 3D CNC Prototyping System. Molded by this method, without the need for time-consuming, expensive molds or special tools for the design and machining, and greatly improve the efficiency of production and manufacturing flexible.
               SLA rapid prototyping machine laser rapid prototyping process
SLA laser molding principle: First, the liquid filled in the chambers of the light curable resin, the laser beam can be scanned in a liquid on the surface under the action of the deflection mirror, the scanning locus of the presence or absence and light by computer control, the spot hit to the place where the liquid is cured. Forming the beginning of the work platform to a certain depth below the surface, the focused spot on the liquid surface computer instruction-by-point scanning, that pointwise curing. When the layer scanning is complete, not irradiated liquid resin. And then lifting platform to drive the platform lowering the layer height, and covered with a layer of resin on the level of which has been molded, Calibrating the large viscosity of the resin liquid level Calibrating, and then to the next floor of the scan, the new cured layer firmly glued to the first layer, so repeat until the entire parts manufacturing finished parts, forming a three-dimensional solid model SLA process high precision.
SLA rapid prototyping characteristics:
1, high precision machining, up to 0.1mm;
2, we can manufacture complex shapes (such as hollow parts), especially fine (such as jewelry, handicrafts, etc.) parts, suitable for cell phones, radios, walkie-talkie, mouse and other delicate parts and toys as well as high-tech electronics industry cabinet appliance housing or model, motorcycles, auto parts, or model, medical equipment, etc.;
Manufacturing parts fast 0.1-0.15mm layered scanning;
4, good surface quality, can produce very fine details of the thin wall structure, post-processing easily;
5, the processing in place, many the CNC hand do processing less than the details of the part can be processed, thereby reducing the workload of the post-processing;
Inadequacies: the laser forming choose the photosensitive resin material is relatively simple, the CNC hand, but SLA Hand toughness and strength is not as good as, the buckle located easily broken.
SLA rapid prototyping material (photosensitive resin) features:
Similar to the traditional engineering plastics ABS, transparent or beige with some viscous liquid, to make the workpiece is translucent beige, good strength, can be assembled, playing self-tapping screws, painting, screen printing, the disadvantage is impatience high temperature


the vowin company as China's first state-level rapid prototyping service center, laser forming has accumulated a wealth of experience, the U.S. 3D SYSTEMS laser machine and American HUNTSMAN provided photosensitive resin RenShape SL7810, making accuracy up to up to ± 0.1mm.

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