With metallic and plastic 3D-printing technologies, ADDIDREAM fully uses the potential of additive manufacturing, by offering a parts prototyping service in optimal deadlines, thus improving prototypes’ making and validation time, and so reducing delays until the part is available on the market.
COMPUTER AIDED DESIGN
From a digital file, that will reinvent new instruments and medical implants thanks to specific software. The file is then treated and sent to the machine.
Making of the wanted product in 3 dimensions, thanks to the transfert of the digital file towards the printer. The machine settings are to be adapted according to the part and materials wanted, as is the pre-conceived digital file.
After-printing treatments (milling, thermal treatment, surface treatment…) in order to take the part out of the machine, and establish the final properties wanted by the client.
The Direct Metal Laser Sintering via powder bed (DMLS) is the most used fast prototyping process for mechanical parts production. It consists in superimposing layers of metallic powders of a chosen thickness. Each layer is swept by a laser beam. The path of this laser beam will draw the outlines and shapes of the final part. Once the process is done, the part is removed from the powder container.
DESCRIPTION OF THE PROCESS
Step 1: The 3D printer is made up of 2 tanks activated by a piston. Of the tanks contains metallic powder (left on the diagram), whereas the other is empty (on the right).
Step 2: A roll lays a pre-set height of powder layer in the empty tank.
Step 3: A laser fuses the metallic powder according to the object’s wanted shape.
Step 4: Finally, a second powder layer is applied and fused using the same process. This operation is done repeatedly until the object is completely finished.
This technology highly speeds up the making of complex parts.
Biocompatible usable materials: Cobalt-chrome, Stainless Steel (316 L, 17-4 Ph) and Titanium (TA6V ELI)
The Selective Laser Sintering (SLS) is similar to the powder bed processes of metallic technologies, but uses a plastic powder. A less powerful laser is needed because the melting point of plastic materials is lower than metal’s. It has the same advantages as the metallic process: manufacturing of complex equipment at high speed. It is currently the process with the best precision. Moreover, in contrast to other methods of additive manufacturing such a stereolithography (SLA) and Fuse Deposition Modeling (FDM) or Fused Filament Fabrication (FFF), SLS does not need a support structure: the powder acts as its own support.
Biocompatible usable materials: Polyamide PA 11