Plastics processes from voxeljet for investment casting applications

3D printing with polymer based materials is the ideal solution for the cost-effective and time-saving production of investment casting models. The models are created by the layered application of a particle material that is selectively bonded with a binder. As the particle material, PMMA (polymethyl methacrylate), an acrylic plastic with excellent burnout properties, is used. Complex components up to a length of 1,000 mm can thus be produced quickly and easily.

Properties of plastic

  • Ideal for producing investment casting models, thanks to the optimum burnout properties of the PMMA particulate material
  • High print resolution and detail accuracy
  • Conversion of thin wall thicknesses (from only 0.6 cm) possible
  • Economical production in batch sizes of 1 as well as in small series production

 
Benefits of 3D-printing plastic models:

  • Economical production: investment casting models are printed without tools, without the need for complex and expensive pattern making
  • Large-format printing: Molds can be produced on a building platform measuring 1,000 x 600 x 500 mm (LxWxH)
  • Complex components: Nearly unlimited geometries.
  • True-to-detail models due to a layer thickness of 150 µm and a print resolution of up to 600 dpi
  • High size accuracy: No danger of heat distortion - even in large 3D models - due to a printing process that takes place at room temperature
  • Ideal investment casting handling trough wax infiltration just like conventional wax models
  • Low residual ash content
  • No shell breakage due to negative thermal expansion coefficients
  • Recycling possible: almost 100 % of loose, unprinted material can be reused

 

Contact us and order your component here

PLASTIC
Base materialPMMA particle material (55 µm)PMMA particle material (85 µm)
Binder-typePolyPor BPolyPor C 
Tensile strengthup to 4.3 MPaup to 3.7 MPa
Yield point1 %1 %
Burn-out temperature700 °C600 °C
Residual ash content< 0.3 weight %< 0.02 weight %
Especially suited forInvestment casting; design modelsInvestment casting
Advantagessharp edges; for highest accuracy and true-to-detail; reusable particle materialburns out very well
TECHNICAL DATAPLASTIC PARTS
Layer thickness     Standard 150 µm
Resolution x, yup to 600 dpi
Accuracy± 0.4 % (min. ± 0.3 mm)
SUITABLE FINISHING TREATMENTWaxEpoxy
Tensile strengthsee base materialup to 25 MPa
Softening temp.73 °C 80 °C
Burn-out temp.see base material   -
Characteristicssmooth liquid, resistant surfacesolid material, dyeable