3D microwave printer
A new system for additive manufacturing by using microwave heating
Exhibitors
Location
Hall 11, Stand B06
Description
There are a number of additive manufacturing methods for three-dimensional plastic parts, such as fused deposition modeling, stereolithography or selective laser sintering, some of which allow 3D printing with short fibers. The known additive processes for continuous filament reinforcement, however, are severely limited in terms of filament diameter, fiber volume content and printing speed due to the disadvantage of the heating source used and the printing control technology.Based on electromagnetic heating, scientists at the Institute for Pulsed Power and Microwave Technology (IHM) have developed an alternative 3D printing technology that can process continuous fiber reinforced thermoplastic composites (CFRTP) with high-speed. This succeeds with a resonant microwave applicator as printing head. This allows uniform and rapid heating of even large diameter filaments. Here, a pre-impregnated filament – a string-shaped polymer that encloses the continuous fibers – is fed into a coaxial resonator where it also functions as the inner conductor of the resonator. As the fiber reinforced filament moves through the resonator, it is heated over the entire volume cross-section by microwave radiation. Finally, the heated filament is pressed or pulled out of the printing nozzle and printed onto the printing platform or as a free-standing lattice structure in three-dimensional space.The microwave printing technology enables the flexible production of mechanically robust CFTRP composite structures by taking advantage of the benefits of instantaneous, selective and volumetric microwave heating. With a printing speed up to ten times faster than common technologies and the suitability for large diameter filaments, the process offers high potential for industrial applications.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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