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A carriage — with four or more print heads and
ultraviolet (UV) lamps — traverses the work
space, depositing tiny droplets of photopolymers,
materials that solidify when exposed to UV light.
After printing a thin layer of material, the process
repeats until a complete 3D object is formed.
These well-established technologies create
models or finished goods for industries that
span jewelry and architecture to aerospace and
consumer electronics manufacturing.
The PolyJet jetting head slides back and forth along the X-axis, similar to a line printer, depositing a single super-thin layer of photopolymer onto the build tray. Immediately after building each layer, UV bulbs alongside the jetting bridge emit UV light, immediately curing and hardening each layer. This step eliminates the additional post curing required by other technologies.
The internal jetting tray moves down with extreme precision and the jet heads continue building, layer by layer, until the model is complete. Sophisticated software tools enable all heads to work in perfect harmony, to synchronously jet identical amounts of materials on the tray. This results in a perfectly even and smooth surface. Two different photopolymer materials are used for building: one for the actual model, and another gel-like material for support. The geometry of the support structure is preprogrammed to cope with complicated geometries, such as cavities, overhangs,
undercuts, delicate features, and thin-walled sections. When the build is finished, a WaterJet easily removes the support material, leaving a smooth surface.
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