SLA technology, known as Stereo lithography Appearance, uses a laser to focus on the surface of a light-cured material, causing it to solidify sequentially from point to line and from line to surface, over and over again, so that layers are added to form a three-dimensional entity.
Most SLA 3D printers have the advantages of low price, large molding volume and low waste material cost, which are highly sought after by 3D printing service manufacturers and general customers.
SLA resin printing services are widely used in the following areas:
Electronics, consumer products hand plate model, medical device design and development, medical surgery model, cultural creative product development, architectural design model, auto parts sample trial production, large industrial parts trial production, small batch manufacturing of industrial products.
The processis, first of all, to design a three-dimensional solid model through CAD, using discrete programs to slice the model, design the scanning path, the data generated will precisely control the movement of the laser scanner and lifting platform; The laser beam shines on the surface of the liquid photosensitive resin according to the designed scanning path through the scanner controlled by the numerical control device, so that a layer of resin in a specific area of the surface after curing, when a layer is finished, a section of the part is generated;
Then the lifting platform drops a certain distance, the curing layer is covered with another layer of liquid resin, and then the second layer is scanned. The second curing layer is firmly bonded to the previous curing layer, so that the layer is superimposed to form a three-dimensional prototype.
After the prototype is removed from the resin, it is finally cured and then polished, electroplated, painted or colored to obtain the required product.
SLA technology is mainly used to manufacture a variety of molds, models, etc. It is also possible to replace the wax mold in investment precision casting with SLA prototype mold by adding other components to the raw material.
SLA technology has faster forming speed and higher accuracy, but due to the shrinkage of resin during curing, stress or deformation will inevitably occur.
Therefore, the development of shrink, fast curing, high strength photosensitive materials is its development trend.
Author: Alisa