3d printing is a manufacturing process in which we fabricate things in an additive manner from different types of material like PLA, Wood, ABS, etc. In this process, the object is fabricated layer by layer. Each of this layer can be seen throughout the object in horizontal cross-view. It allows you to make complex shapes and structures using less time and less material as compared to subtractive manufacturing.
Types of 3D Printers and Working:
SLA- Stereolithography, Direct Light Processing (DLP)
It is the oldest additive 3d printing technology. In this type of 3d printing, we expose each layer of photosensitive liquid resin to a UV-leaser. When the resin got in contact with the UV light it gets harden and that is how we do for each layer and the final the product gets ready. In DLP the process is the same as SLA. The only key difference is that in DLP digital light projector is used to project every single layer of the object at once.
FDM-Fused Deposition Modelling, Fused Filament Fabrication (FFF)
It is the most frequently used desktop 3d printing in the market. It consists of a nozzle for extrusion of the desired material. The material is first heated and fed to the nozzle which is then printed layer by layer and layer can be seen in horizontal cross-section view. It built the object in a bottom-up manner, sometimes we need support for complex thing to get the print. Support can be of the same material as well as of different material. It is the most cost-effective and commonly used 3d printing technology.
SLS- Selective Laser Sintering
In this type of 3d printing, we take grains of our desired material like plastic, glass, metal, ceramic, etc. and the grains are then subjected to a leaser which solidifies them layer by layer. When the first layer is printed the bed lowers down and the next layer is get printed above the previous one and so on. That is how the whole object gets printed layer by layer.
Material Jetting (MJ), Drop on Demand (DOD)
In this type of 3d printing, the droplet of material is dropped and gets selectively deposited on a build plate and then it is exposed to light and that is how the whole object has printed the layer by layer.