The basic principle of 3D printing or additive manufacturing is that the object designed under a 3D modeling software or digitized through a scanner is sectioned into thousands of slices of approximately 0.1 mm thick, which will be merged over each other by the 3D printer.
In essence, it works the same way as a traditional ink jet printer, where the ink is printed in layers to form an image. There are different 3D printing methods to choose from depending on the application.
Before you start your 3D project, you need to define what features the printed part will have .
The choice of technology will be based on the budget allocated, the size and geometry of the piece, the desired surface condition (smooth, laminate, etc.), the need for post-treatment (paint, etc.), the strength and heat resistance.
3D printing with binder uses a fine, dry powder with liquid glue to form layers and, finally, a solid object.
Another method, the polymerization, merges liquid plastic with an ultraviolet light beam that solidifies the liquid.
Laser selective sintering 3D printing uses a laser to melt a powder of plastic (for example, Polyamide, Nylon, Alumide or Carbonmide) that solidifies to form a particular layer.