3D-PRINTING USING FOCUSED SUPER SONIC BEAMS
The invention belongs to the field of generative/additive manufacturing (better known as „3D printing”). Additive manufacturing describes usually building up a structure layer by layer from a granulate or liquid using physical/chemical processes as melting or curing of a material.
In contrast to building up a structure in layers as in usual additive manufacturing processes the inven- tion presented here uses the penetration depth of focused ultrasound waves in polymeric materials to form a melting zone at a specific location inside a volume of granulate. The ultrasonic focus and thus the melting zone can be moved arbitrarily through the polymer granules, such that a continuous component is produced. Thus, it is possible to generate a component directly inside a process cham- ber filled with polymeric granulate without any layering. The main advantage of this technology is the spatial freedom for building up the component, i.e. the problem of reduced strength perpendicular to the layering plane as with common 3D-printing is solved by this invention. Limitations of the material properties are overcome.
- Additive manufacturing in volume
Basic feasibility test successful
Figure: ultrasonic sound from the transducer is focused into the thermoplastics melting thermoplastics.