| 摘要 |
The present invention relates to a process for the bonding of material for the production of three-dimensional objects by means of selective heating via electromagnetic energy which is either non-coherent and/or non-monochromatic and/or non-oriented, with a wavelength of from 100 nm to 1 mm. This radiation may be emitted in spot or linear form, or else in spread form. It is also possible to combine two or more sources of radiation in order to increase the speed of the process. The selectivity of the melting process is achieved via the application of an absorber to certain subregions of a layer composed of a pulverulent substrate, and then heating of the absorber by means of electromagnetic energy of wavelength from 100 nm to 1 mm. The heated absorber transfers the energy present therein to its surrounding pulverulent substrate, which is melted thereby and, after cooling, has firm cohesive bonding. The process is markedly more flexible, less expensive, and faster than conventional laser sintering. |
