Today, Additive manufacturing technologies

have evolved significantly, more materials
are available and limits on geometries disappeared.

However, this process has limits, parts printed need to be used
for prototypes and models for validation of geometries and concepts

Here a short summury of technologies and their advantages and disavantages :

Stereolithography

1

SLA / DLP (Stereolithography)

Photo sensitive resin, bulding layer by layer with a UV lazer.
2

Advantages

The lazer accuracy allow to make parts with a very good visual aspect and best tolerances than others technologies.
3

Disadvantages

Because resines are made from Acrylates + Epoxy, parts are not UV resistant and become to be yellow and brittles.
4

Applications

Cosmetic prototypes for shows, concept validation, form testing without mechanical stress.
1

SLS (selective laser sintering)

Nylon or TPV powder seintered with an infra red laser layer by layer.
2

Advantages

Parts are more resistant than SL and SLS technology allows to make flexible parts.
3

Disadvantages

Poor surface finish, hard to improve, wide tolerances. Process don’t warranty homogeneity from a prodcution to an other.
4

Applications

Test prototypes that needs mechanical resistant.

Selective laser sintering

Polyjet

1

Polyjet

Spraying of small droplets cured by UV layer by layer.
2

Advantages

Technoly allowing to make bi material parts (rigid and flexible) with a good surface finish.
3

Disadvantages

Because resines are made from Acrylates + Epoxy, parts are not UV resistant and become to be yellow and brittles.
4

Applications

Cosmetic prototypes for shows, concept validation, form testing without mechanical stress.