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Basics of SLA 3D Printing
SLA 3D printing, or Stereolithography, is an additive manufacturing technology. It is best known for printing complex, fine-featured parts fast and accurately with a perfect surface finish. This resin 3D printing process is becoming more and more popular due to these capabilities.
Let’s first start with what SLA (Stereolithography Apparatus) 3D printing is and how it works. SLA produces parts layer by layer. It is also a form of vat photopolymerization, which is a resin 3D printing technique that produces objects by curing photopolymer liquid resin through light-activated polymerization selectively. Then, a laser beam (UV light) must be focused on the surface of a photosensitive liquid. A set of mirrors then reflect the UV light onto the photopolymer resins, which causes the photopolymers to stick to the platform. As layers are cured, the build platform is lowered or raised, followed by a new photopolymer later. The process repeats itself until the object is complete.
SLA 3D Printing has many key benefits among which is the wide range of configuration of SLA resin materials including standard resins, high-temperature resins, flexible resins, clear resins and castable resins.
Industrial SLA 3D Printers have many advantages in production. They have large builg volume, speed, high-quality and complex part production with a smooth surface finish. It is possible to produce end-use parts, manufacturing tools and injection mould on industrial SLA 3D printers easily.
Advantages of SLA 3D Printing
As mentioned before, it is possible to build complex parts with repeatable accuracy with SLA 3D printing. SLA 3D printing gives us the ability to adjust the laser, pixel resolution and layer height to achieve the right accuracy. Also, SLA 3D printing removes heat from the light source and keeps the printer’s temperature consistent, which is a big plus. SLA 3D printers can also print in various materials for many different industries. Among these are polymers, rubber-like materials, biocompatible polymers and many more. Furthermore, SLA 3D printers can print at resolutions like 10 microns, which means that the final part will have fine features. This reduces the need to post-process the materials, while at the same time increasing accuracy in complex parts. As a result, you get smooth surface finish and shorter lead times.
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