What are the advantages of SLA 3D printing?

SLA is an additive manufacturing process, belonging to Vat photopolymerization series. In SLA, objects are created by selectively curing a polymer resin layer by layer using ultraviolet (UV) laser beams. The materials used in the SLA are photosensitive polymers in liquid form.

SLA is known for being the first 3D printing technology: its inventors patented the technology back in 1986. SLA is the most cost-effective 3D printing technology for parts that require very high precision or smooth surface finish. The best results are achieved when designers exploit the strengths and limitations of the manufacturing process.

In AN SLA system, most print parameters are fixed by the manufacturer and cannot be changed. The only inputs are the height of the floor and the direction of the parts (the latter determines the position of the supports). The typical layer height in SLA ranges from 25 to 250 microns. The lower storey height captures the curved geometry more accurately, but increases build time (and cost) and the likelihood of printing failures. The 100 micron height is suitable for most common applications.

SLA technology is versatile and can be used in situations where precision is a priority and form, fit, and assembly are critical. With tolerances typically less than 0.05 mm for SLA parts, this technology provides the smoothest surface finish of any additive manufacturing process. Given the level of quality that SLA can achieve, it is particularly useful for quickly and inexpensively creating high-precision 3D-printed casting models from small to very large scales.

KINGS SLA 3D printers (printing sizes range from 300*300*350mm to 1700*800*600mm) offer high throughput, unmatched part resolution and accuracy, and a wide range of printing materials. No other additive manufacturing process can meet a wider range of applications, including the most demanding rapid manufacturing applications for the manufacture of high-precision and durable prototypes in a variety of shapes. After completing the SLA printed parts, they will be cleaned in a solvent solution to remove any wet resin remaining on the surface of the parts. The parts are then cured in a UV oven to complete the resin printing process.

In summary, here are the advantages of stereo lithography (SLA) :

High precision, fine detail: Due to the extremely thin (0.05 to 0.25 mm) layers applied in stereo lithography and the fine laser beam, prototypes with very realistic finish and complex geometry can be obtained.

Part quality: Parts made using stereolithography have good functional surface quality despite the use of alternative materials (resins). Slas allow manufacturers to save time manufacturing high-precision parts, especially when you need multiple functional prototypes or quick single casting models

Finish: In stereo photolithography, the resulting parts have a finish that allows them to choose from a variety of resins for different renderings, making them easier to polish, paint and polish when necessary, ideal for wind tunnel testing and similar applications.

From smallest to largest: Using stereophotography, it is possible to create small parts in high definition, as well as larger parts up to two meters in size, while maintaining high accuracy. You can even print bumper, grille, dashboard and other parts 1:1 using KINGS ‘large size 3D printer. This effectively reduces errors and wasted labor costs caused by splicing, while improving the development efficiency of automotive products by more than five times.

Price and lead time: By choosing the stereo lithography method, you can get parts in about two days because the 3D file is enough to start printing. On the other hand, the cost is reasonable because there is no need to create a mold, because stereolithography works by adding materials.

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