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Additive manufacturing process for plastics

Stereolithography SLA

For SLA 3D printing, a liquid resin (photpolymer) is cured by a laser layer by layer.

Installation space

650 x 750 x 550 mm

Applications

  • Rapid prototyping, functional prototypes
  • Small series
  • Model making
  • Presentation aids such as illustrative or exhibition models
  • Design objects

Advantages

  • Very small, fine components can be produced
  • Smooth surfaces
  • High accuracy and exact detail resolution
  • Low tolerances
  • Translucent parts are possible

In stereolithography (SLA), the manufacturing process takes place in a basin with a movable print bed and liquid resin, the photopolymer. Initially the print bed is only covered with a thin layer of the plastic. A laser beam (UV light) is used to project the shape of the desired components onto the material. The plastic solidifies after a short exposure time, the print bed is moved down a little and the next layer of photopolymer is solidified. In order to print overhanging structures in this 3D printing process, so that parts do not simply sink into the liquid polymer bed, support structures must also be printed. There are also printers that work in the opposite direction and harden the plastic piece by piece from below.

After the components have been produced, the support structures are removed and the components are post-cured under UV light in an exposure chamber. If required, the components can then be ground, painted and/or polished.

With stereolithography (SLA), highly transparent components can be produced as is possible with almost no other technology: Material ClearVue transparent.

Suitable 3d printing materials