WHAT IS 3D PRINTING
3D printing is the process of converting any digital file into a real 3d object. You can draw using CAD design software or scan any object you would like to get into real object or you can simply download any files from the internet. Printer object is formed by successive layers of print material. 3d printing has been great impact in many industries such medical, science, engineering, aerospace, education and many more.
How does 3D printing work?
It all starts with making a virtual design of the object you want to create. This virtual design is for instance a CAD (Computer Aided Design) file. This CAD file is created using a 3D modeling application or with a 3D scanner (to copy an existing object). A 3D scanner can make a 3D digital copy of an object.
Methods and technologies:
Not all 3D printers use same technologies it differs printers to printers, but all printers ultimate function is to bring the real object it’s all about how it brings. Mostly and widely used technology for creating the final objects are Selective laser sintering (SLS) and fused deposition modeling (FDM) Another method of bringing the real object is to lay liquid material (stereolithography (SLA))
- SLS (selective laser sintering)
SLS is an addictive manufacturing technique that requires the use of a higher electrical power laser light (a carbon dioxide laser) to help join little allergens connected with plastic, material, ceramic, or perhaps wine glass powders right size with a sought after three-dimensional form. The laser selectively fuses powdered material simply by encoding, cross-sections generated from your 3-D printer and description from the part (for the case in point from your CAD file or perhaps search within data) on the outside of the powdered cargo area. After each cross-section is actually scanned, this powdered cargo area is actually reduced simply by a single covering width, the latest covering connected with material is actually used number one, and the method is actually replicated before the part is actually finished.
- Fused deposition modeling (FDM)
FDM starts with a product, process which forms an STL document, numerically cutting and situating the model for the manufacturing process. Within off the opportunity that obliged, help structures may be created. The machine may apportion numerous materials to accomplish diverse objectives like one could utilize various shades of the same sort of thermoplastic on the same model.
This aspect is created by expelling very small dots of thermoplastic material in order to design or form layers because the plastic material solidifies instantly right after extrusion from the nozzle which is sole heart of printing an object.
Once, after inserting the print material into an extruder, it pushes the material to the tip of the nozzle where the nozzle will be heated to melt the plastic to form the layers. The nozzle can be moved both horizontally and vertically as per the functionality. The mechanism used is often an X-Y-Z rectilinear design, although other mechanical designs such as deltabot have been employed.
Despite the fact that as a printing engineering FDM is exceptionally adaptable, and it is equipped for managing little shades by the backing from lower layers, FDM for the most part has a few limitations on the slant of the shade, and can’t create unsupported stalactites.
- Stereolithography (SLA)
SLA is an additive manufacturing process which uses the photopolymerization that uses a vat of liquid ultraviolet curable photopolymer “resin” and an ultraviolet laser to build parts’ layers each one in turn.
It need the usage of supporting structures which serve to connect the path to the lift stage, counteract diversion because of gravity and hold the cross areas set up so they oppose horizontal weight from the re-coater edge. Backings are created consequently amid the readiness of 3d Computer Aided Design models for utilization on the stereolithography machine, in spite of the fact that they may be controlled physically. Helps must be expelled from the completed item physically, dissimilar to in other, less exorbitant, quick prototyping innovations.
Stereolithography is well known for its speed and it can produce a part up to a size of 50x50x60 cm, and if it is a huge machine that has the feature of stereolithography can generate 210x70x80cm.
3d print objects can be created via CAD design or scanning process. Once the design is loaded through software (i.e pronterface) the printer will be ready to print the object after slicing them layer by layer. If consumers find difficult to scan or draw the object, they can download from thingiverse, shapeways, threeding.
The main process of a 3d printer is to print the object once the file is converted into .stl and loaded, the sliced file will start to get a print via the nozzle. Nozzle commonly comes as 1.75 or 3mm, printer follows the instruction we give in G code like layer thickness, print resolution, temperature, print speed, The more the time a printer takes to print the highest resolution print we might get. Calibration of a printer is a main factor to get good print. Once the temperature reaches its level the plastic get melt and flows through the nozzle and that’s how an object is being created in 3d printer.
Widely used in science and engineering, medical field, aerospace, automobiles, architecture, educational, entertainment.
3d printing technology has been widely used in many industries recently it was used by NASA and reached the sky. Even Mercedes internal small parts are printed object, and to further extent it’s been seriously under discussion and research to use for internal organs for humans researches might be testing this for animals first if it success then it will be a huge landmark for a 3d printing for now this additive manufacturing is being used for external organs like replacing wounded hand, fingers, artificial hand and leg so and so. Several terms have been used to refer to this field of research like: organ printing, bio-printing, and computer-aided tissue engineering.
3D modeling software
3D modeling software also comes in many forms. There’s industrial grade software that costs thousands a year per license, but also free open source software, like Blender, for instance. You can find some beginner video tutorials on our Blender tutorials page.
From 3D model to 3D printer
You will have to prepare a 3D model before it is ready to be 3D printed. This is what they call slicing. Slicing is dividing a 3D model into hundreds or thousands of horizontal layers and needs to be done with software.
Sometimes a 3D model can be sliced from within a 3D modeling software application. It is also possible that you are forced to use a certain slicing tool for a certain 3D printer.
When the 3D model is sliced, you are ready to feed it to your 3D printer. This can be done via USB, SD or wifi. It really depends on what brand and type 3D Printer you have.
When a file is uploaded in a 3D printer, the object is ready to be 3D printed layer by layer. The 3D printer reads every slice (2D image) and creates a three dimensional object.
We all for mass production and assembling a full machine requires a lot of internal arts and the production cost will be high, here where 3d printing started to play its role more than decades 3d printing is available but after 2005 people in industrial filed has realized the value of 3d printing and its usage. As 3D printer can create multi parts in just one printer obviously it will save 10 times less than what they spend in the manufacturing process, manufactures, uses 3d printer to create prototypes and that’s why it named as Rapid Prototyping.