3D printing or we can say additive manufacturing is a process of making three dimensional solid objects by using digital file. The design of a 3D printed object is achieved with the help of additive processes. In this process an object is created by laying down successive layers of material until the entire object is created. We can see each layer as a thinly sliced horizontal cross-section of the eventual object.
Working of 3d printing
Computer Aided Design file uses a 3D modeling program for the creation of a totally new object. 3D scanner is used to copy an existing object. This scanner then makes a 3D digital copy of an object and puts it into a 3D modeling program.To prepare the digital file created in a 3D modeling program for printing, the software divides the final model into hundred or thousands of horizontal layers. The printer creates the object layer by layer when this prepared file is uploaded in the 3D printer. The 3D printer reads every layer and proceeds to create the object. It all starts with making a virtual design of the object what you want to create. This virtual design is made in a CAD, which resuls in one three dimensional object.
Methods and technologies of 3D Printing
There are several ways several methods to do it. Mainly layers are build to create the final object. Some of methods are use to melting or softening material to produce the layers.The most common technologies using this way of printing are Selective laser sintering (SLS) and fused deposition modeling (FDM). There is Another method of printing that is to lay liquid materials that are cured with different technologies. The most commonly used technology which using this method is stereolithography (SLA).
Several Applications are design visualization, prototyping/CAD, metal casting, architecture, education, healthcare and entertainment/retail.Some other applications would include reconstructing bones and body parts in forensic pathology and reconstructing heavily damaged evidence acquired from crime scene investigations.
The technology for printing physical 3D objects from digital data was first developed in 1984 by Charles Hull. He named the technique as Stereo lithography and obtained a patent for the technique in 1986.
3D is very helpful in our coming future. It is predicted that this technological development will change the nature of commerce that is because end users will be able to do much of their own manufacturing rather than engaging in trade.3D printers capable of outputting in colour and multiple materials already exist and it will continue to improve to a point where functional products will be able to be output. With effects on the energy use, reduction of waste, medicine, art, construction and sciences , 3D printing will change the developing world as we know it.