What is the sla laser rapid prototyping process in 3D printing?

What is the sla laser rapid prototyping process in 3D printing?

         The so-called sla laser rapid prototyping process is also known as the SLA process, also known as stereo lithography or photo-curing process. In 1986, the United States 3D Systems introduced the world's first stereo lithography machine, namely SLA-1. Series molding machines are firmly occupying the market share of 3D printing equipment.

         Sla laser rapid prototyping is based on the principle of photopolymerization of liquid photosensitive resin. Under the irradiation of ultraviolet light of a certain wavelength and intensity, this liquid material can rapidly undergo photopolymerization, which results in a sharp increase in molecular weight and the material changes from a liquid state to a solid state.

sla laser rapid prototyping
          The liquid tank is filled with the curing resin of liquid light. The laser beam can be scanned on the liquid surface under the action of the deflection mirror, so the scanning trajectory and the presence or absence of the laser are controlled by the computer. Where the light spot is scanned, The liquid will solidify. Therefore, at the beginning of molding, the working platform is at a certain depth below the liquid surface, the liquid surface is always at the laser focal plane, and the focused spot is scanned point by point on the liquid surface according to the instructions of the computer to solidify point by point.

          So when the scanning of one layer is completed, the area that is not exposed is still liquid resin. After that, the lifting platform will drive the platform to drop a layer of height, and a layer of resin will be covered on the formed layer. One layer is firmly glued to the previous layer, and this is repeated until the entire part is manufactured, so as to finally obtain a three-dimensional solid model

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