SK Fine’s Technology

Stereolithography (slurry molding) method

Our 3D stereolithography technology and ceramic slurrying technology provide complex structures that could not be made by conventional methods.

3D printer systems

System Stereolithography method Material extrusion method Laser sintering method Binder jetting
Principle Ultraviolet laser Heater CO2 laser, electron beam Ultraviolet lamp
UV curing resin Thermoplastic resin Heat sintering Jetting of UV curing resin
Material and feed Solution, slurry
Liquid tank, blade application		 Filament nozzle Powder
Recoater roller		 Powder
Recoater roller
Sintering After 3D printing After 3D printing Direct sintering After 3D printing
Size Large △, Small ◎ ー ー ー
Roughness Surface ◎, Side 〇 ー ー ー

Features

Comparison between 3D printer and conventional methods

  3D printer
*Ceramic 3D stereolithography method		 Conventional methods
Sheet lamination method Extrusion molding method Injection molding method
Plate, mold, etc. Not required Required: Laminated frame, press die Required: Mold form (plate) Required: Mold
Binder UV resin PVA、PVB Special-purpose resin Thermoplastic resin
Dimensional accuracy 〇 〇 〇 ◎
Complex shapes ◎ ー ー ー
Degree of freedom in shape and structure ◎ Simple shapes, laminated shapes Same cross-section, inclined structures ◎ Mold preparation
Surface condition ◎ Surface △ Laminated layer height differences ー ー ー
Productivity △〇 ◎ ◎ ◎
High-mix low volume ◎ 〇 〇 〇
Main products Electronic parts, medical equipment, heat dissipation, cosmic energy, and environment system parts Ceramic capacitors, LTCC, optical communication parts Ceramic filters, ferrules (optical part) Ferrules (optical part), mechanical parts, dentistry related

Ceramic 3D printing process

  1. 1 Material preparation Prepare ceramic powder and UV curing resin

  2. 2 Material creation (agitation process) Use a planetary centrifugal mixer to mix the ceramic powder and UV curing resin into a slurry mixture (paste), and then set the mixture in the 3D printer.

  3. 3 Creation of slice data for 3D printing Use slicer software to convert 3D CAD data into slice data, and enter it into the 3D printer.

  4. 4 Creation of 3D printed object (3D printing process) Apply the slurry material on each layer using the 3D printer, and irradiate it with a UV laser to create a 3D printed object.

  5. 5 Creation of 3D printed object (cleaning process) Remove uncured slurry and take out and clean the 3D printed object.

  6. 6 Sintering (degreasing process) Put the 3D printed object into the degreasing furnace to remove resin components.

  7. 7 Sintering (sintering process) Put the 3D printed object into the sintering furnace.

  8. 8 Completion The 3D printed object is completed when it returns to normal temperature after sintering.

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