甘比拓展写作-3D printer-张成

How does the 3D printer work? Imagine a water bottle. Then cut it into many planes. You will see many concentric circles of different sizes and other circulars. The job for 3D printer is to create each of those concentric circles and circular and glue it together according to the image of the water bottle.

In another words, a typical 3D printer is very much like an inkjet printer operated from a computer. It builds up a 3D model one layer at a time, from the bottom upward, by repeated printing over the same area in a method known as fused depositional modeling (FDM). To print out a solid object, you need to “paint” the structure of the object using three-dimensional modeling software. The “map” will help nozzle to negotiate the maze successfully. In the process, the model is printed on a baseplate that move in the vertical direction, while the print head and nozzle move in horizontal direction. After one layer is done, the printer bed lower a little, allowing another layer to pile on, thus to build up the height.

The raw material for 3D printer is plastic. The requirement is a very high. The plastic needs to be heat easily and turn solid when you cool them down. The common raw material is thermoplastics and typically one called ABS (acrylonitrile butadience styrence). It’s perfect for 3D because it’s solid at room temperatures and melts at a little over 100℃，which is cool enough to melt inside the printer without too much heat and hot enough that model printed from it won’t melt if they’re left in the sun.