HSS

Step 1

Printing

In the HSS process, the first step is the production of a CAD (Computer-Aided Design) model using standard CAD software. This CAD model is then digitally sliced into 2D cross-sections, which are outputted as bitmap images. Each image represents one layer of the final object. The HSS machine setup includes two beds: the build bed and the feed bed. The powder and the machine itself need to be prepared before the printing process can begin. During the printing process, the machine applies ink to the selected areas of the build bed, which have been deposited with RAM (Rapid Additive Manufacturing) material. RAM absorbs sufficient energy to sinter the powder particles. This process is repeated layer by layer until the entire object is built. Unlike other AM processes that operate on a pointwise basis, the HSS process has a constant layer time, regardless of the geometry and size of the printed 2D cross-sections. This characteristic allows HSS to achieve higher output within the same given time.

Step 2

Support Removal

Manual Removal Non-applicable; parts are supported by the surrounding unfused powder in the build chamber. Soluble Support Removal Non-applicable. Manual Cleaning Note: Loose powder is removed using compressed air, bead blasting, or vacuum; parts are cooled first to prevent warping or damage.

Step 3

Surface Finishing

Sanding / Polishing Can be used to smooth surfaces or prep for coating, especially for cosmetic or tactile parts. Chemical Smoothing / Coating Vapour smoothing (e.g., acetone or chemical vapour treatments) is applicable to improve surface quality and water-tightness. Painting / Priming Frequently applied for aesthetic or branding purposes; parts take paint well after light surface prep. Gloss / Matte Control Native surface is matte and slightly grainy; gloss can be added through post-process coatings or smoothing.

Step 4

Curing / Heat Treatment

UV / Thermal Curing Non-applicable. Annealing / Stress Relief Non-applicable.

Step 5

Assembly and Functional Finishing

Gluing or Bonding Epoxies, cyanoacrylate, or thermoplastic welding can be used depending on application. Drilling / Tapping / CNC Common practice for refining tolerances or adding functional holes, threads, and mating surfaces. Inserts / Fasteners Heat-set or ultrasonic inserts are widely used, especially for load-bearing or mechanical assemblies.

Step 6

Special Treatments

Infiltration / Sealing Optional if watertightness or chemical resistance is required (e.g., epoxy or silicone infiltration.) Functional Coatings May include UV-resistant, anti-static, or abrasion-resistant coatings. Post-print Functionalisation Parts may be dyed (typically black or grey), sterilised (for medical use), or assembled with electronics or moving components.