Light curing molding technology (SLA) is a rapid prototyping technology that first appeared and realized commercialization in the world, and it is also one of the most in-depth and widely used rapid prototyping technologies. It mainly uses photosensitive resin as a raw material, and utilizes the characteristic that liquid photosensitive resin will cure quickly under ultraviolet laser beam irradiation. The photosensitive resin is generally liquid, and it immediately initiates a polymerization reaction and completes curing when irradiated with a certain wavelength of ultraviolet light (250 nm to 400 nm). SLA focuses on the surface of the photocurable material by using ultraviolet light of a specific wavelength and intensity, and solidifies it sequentially from point to line and line to surface, thereby completing the drawing of a layered cross-section. SLA process printing process
1. Control the printing screen to sink to a certain height below the resin surface, so that the screen is covered with a layer of material.
2. The computer controls the laser and galvanometer, and uses UV laser to scan the cross-section of the part currently to be printed, and solidify the part of the material that needs to be printed from liquid to solid.
3. After the scanning is completed, the screen sinks to a certain height, and the squeegee spreads a layer of material (the main function is to smooth and fill the large flat material), and repeat the above step 2 until the printing is completed.
4. After the printing is completed, take out the printed product, which needs to be cleaned with absolute ethanol and second-cured by ultraviolet light.