Furan Direct Binding - FDB

Furan resins have been in use in the casting industry for decades. Material properties have been tried and tested many times and are well known. This also applies to 3D printing. Our furan resin processes are characterized by low costs, high sand diversity and feasible component sizes and quantities. Casting molds with dimensions of up to 4 x 2 x 1 metres can be 3D-printed quickly and without the need for tooling. The broad range of sand types to choose from, allows customers to achieve ideal casting properties. In addition to furan resin, voxeljet also offers phenolic resins or inorganic binder systems.

Advantages:

  • Various sands printable (silica: GS14/19/25, Cerabeads, Kerphalite)
  • Self-hardening process
  • Low cost materials
  • Traditional casting materials
  • Good strength (up to 220 N/cm³)
  • Printed molds can be easily combined with conventional molds
  • All alloys can be cast
SANDTYPES Silicia sandCerabeads
Build platform up to 4000 x 2000 x 1000up to 1500 x 700 x 700
Type GS 14 / GS 19 / GS 25Cerabeads
Medium grain size140 / 190 / 250 µm 200 µm
Application Molds and cores with high surface requirements/ Cores with high gas permeability/ Cores; highest gas permeabilityHigh thermal resistance, low thermal Extension, good packaging, good strength and Surface, alternative to Chromite, Kerphalite or Zircone
Layer thickness 300 / 300/400 / 300 µm300 µm
TECHNICAL DATASilicia sandCerabeads
Binder-typeCold hardening Furan resin*  
Loss on ignition≤ 1,9 Gew. %**≤ 1,5 Gew. %**
Gas permeability≥ 150  
Accuracy± 0,1 % (min. ± 1,5 * layer thickness)  
Bending strengthfrom 220 N/cm2≥ 300 N/cm2

*Only available as 3D print service at voxeljet Service Centner

**Depending on sand types