Guide to Stereolithography (SLA) 3D Printing: How Resin 3D Printers Work
Stereolithography (SLA) 3D printing is the most common resin 3D printing process that has become vastly popular for its ability to produce high-accuracy, isotropic, and watertight prototypes and end-use parts in a range of advanced materials with fine features and smooth surface finish.
Learn more about Stereolithography: https://bit.ly/2WG6ETt
Stereolithography was the world’s first 3D printing technology, invented in the 1980s, and is still one of the most popular technologies for professionals. Stereolithography belongs to a family of additive manufacturing technologies known as vat photopolymerization, commonly known as resin 3D printing. It uses a UV laser to cure liquid resin into hardened plastic.
SLA 3D printing has the highest resolution and accuracy, the clearest details, and the smoothest surface finish of all plastic 3D printing technologies, but the main benefit of SLA lies in its versatility. Material manufacturers have created innovative SLA photopolymer resin formulations with a wide range of optical, mechanical, and thermal properties to match those of standard, engineering, and industrial thermoplastics.
SLA 3D printers use light-reactive thermoset materials called resin. When SLA resins are exposed to certain wavelengths of light, short molecular chains join together, polymerizing monomers and oligomers into solidified rigid or flexible geometries.
Resin is either poured into a tank by a user, or dispensed automatically from a cartridge, depending on the concrete stereolithography machine.
SLA 3D printing starts by lowering a build platform into the resin and leaving only a thin layer of liquid in between the platform and the bottom of the tank. Afterwards, galvanometers direct the UV laser at the bottom of the resin tank, drawing a cross section of the 3D model and selectively hardening the material. After a layer is finished, the part is peeled from the bottom of the resin tank, letting fresh resin flow beneath, and the platform is lowered once again.
Desktop stereolithography high resolution 3D printing is an affordable option for your workspace. Whether for an engineer, product designer, sculptor, jeweler, or dentist, with the right material there is an SLA application for your profession. SLA 3D printing applications include a variety of areas, such as engineering and product design, manufacturing, dental, healthcare, education, entertainment, jewelry, or audiology.
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More about stereolithography (SLA) 3D printing in our in-depth guide: https://bit.ly/2WG6ETt
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See how to go from design to 3D print with the Form 3+ SLA 3D printer: https://formlabs.com/3d-printers/form-3/
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Formlabs is expanding access to digital fabrication, so anyone can make anything. Headquartered in Somerville, Massachusetts with offices in North Carolina, Germany, Hungary, Japan, China, and Singapore, Formlabs is the professional 3D printer of choice for engineers, designers, manufacturers, and decision-makers around the globe.
Through a continuous commitment to innovation, Formlabs has become the largest supplier of professional stereolithography (SLA) and selective laser sintering (SLS) 3D printers in the world. Formlabs also develops its own suite of high-performance 3D printing materials that continue to expand the range of applications of additive manufacturing, as well as best-in-class 3D printing software, post-processing tools, and automation solutions.
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