- Why is Selective Laser Sintering a good choice?
This technology can accelerate the development of a business, since it remarkably reduces the initial project phase, thus allowing assessment of the project, even before it is completed. Today, many projects involve SLS based designs and, in fact, all evaluations related to shape, applications, dimensions and functions of a product can be performed before it is produced.
- These are some good reasons for choosing laser sintering:
- it is fast and cost-effective;
- it can build durable and functional parts;
- it can build big and complex pieces;
- it allows direct production of reduced volume projects;
- it ensures maximum freedom in design (no supports are needed);
- it allows various finishes;
- it builds parts that can be air tight sealed.
The parts built with laser sintering are made of layers. The basic material is a plastic powder (PA) whose particles have a 50 mw dimension. Each powder layer is applied on top of the previous one. When all layers are placed, a CO2 laser beam, connected to a PC, scans the surface and selectively bounds the powder particles in the diagonal section corresponding to the product. In other words, the laser beam works like a pen reproducing on the powder, layer after layer, what the PC is viewing.
During laser exposition, the excited powder goes beyond the glass transition point and adjacent particles fuse to each other till solidification. This process is called sintering.