Direct Metal Laser Sintering (DMLS) is a process in which metal powder is sintered by using laser energy without melting the metal. The best way to describe sintering is by looking at a ball full of ice cubes in a room temperature and notice that the ice cubes are attached to each other, forming a large solid structure.
In the printing process of DMLS, one of the challenges is to move the laser beam over the bed surface printing area (X,Y). The printing of the X,Y surface is done either by line vector drawing or line raster drawing by moving the laser beam over a powder in a line pattern. The Laser will turn the energy on, on the dots that need to be sintered and off in the spots that are to be cavities; as a result the area where the laser is off will keep the powder un-sintered while the spot that was heated by the laser will sinter and therefore attach bunch of small powder balls together. Read More