SLS White PA12 Prototype with Vapor Smoothing

SLS White PA12 Prototype with Vapor Smoothing

facfox-case-study
Process 3D Print, Polish
Material Plastic
Quantity 1 pcs
Price Range $1-100
Lead Time 2 workdays

Gallery

About Project

This unidentified curved frame prototype shows how vapor smoothing can change the visual and tactile character of white SLS Nylon PA12 without adding a conventional paint layer.

The part combines a continuous outer arc with two branching side structures, rounded end pads, elongated openings, and a small recessed hole. These transitions would make extensive manual sanding slow and inconsistent, especially around internal curves and narrow junctions. SLS was therefore a practical production method: the powder bed supported the geometry during printing, eliminating dedicated support structures and preserving access to the open features.

After printing, cooling, excavation, and powder removal, the white PA12 component underwent controlled chemical vapor smoothing. The treatment temporarily softens the outermost polymer surface so microscopic peaks can flow and level. The resulting finish appears more uniform, slightly satin to glossy, and less powdery than a standard processed SLS surface. It can also reduce surface porosity and make the part easier to wipe clean, although it should not be described as automatically watertight.

The comparison image pairs this component with an earlier white PA12 fist print to illustrate the typical finish difference. Because the geometries are not identical, it is a visual reference rather than a controlled A/B test. Contact FacFox to discuss vapor-smoothed nylon parts, or upload your 3D files for a quote.

Solution

  • Step 1: Review the CAD file for minimum wall thickness, narrow gaps, recessed holes, and areas where smoothing could soften sharp edges or fine details.
  • Step 2: Orient and nest the component in the SLS build to balance dimensional accuracy, surface consistency, powder removal, and production efficiency.
  • Step 3: Spread successive layers of white PA12 powder and selectively fuse each cross-section with a laser until the complete frame is formed.
  • Step 4: Allow the build to cool gradually inside the powder bed to reduce the risk of thermal distortion in the long curved sections.
  • Step 5: Excavate the component and remove residual powder from the elongated openings, recessed hole, junctions, and internal curves.
  • Step 6: Place the clean part in a controlled vapor-smoothing system so the exposed polymer surface levels evenly without conventional sanding or paint.
  • Step 7: Dry and condition the component, then inspect its dimensions, openings, edge definition, color consistency, gloss, and overall surface quality.