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Test Lab for Moulding Materials

In our modern specific test lab for moulding materials all commercially relevant as well as r&d mixes can be produced. Comprehensive mechanical tests are conducted via a state-of-the-art adapted electronic universal testing machine. Classic GF testing devices are applied for comparative purposes according to customer demands. The required mould materials are produced by lab-sized mixing units (10 kg pan grinder or 10 kg Eirich rotary mixer) or impeller mixers (5, 20, or 50 kg batch sizes).


  • Quality assessment of green sand and mould materials
  • Continuous process monitoring of batch mixes from customers (e. g. weekly parameter assessment)
  • Supervision and backing of series batch process optimization 


Mixing and testing of samples of green sand as well as moulding material mixes
Test options:

  • Screen analysis
  • Annealing loss
  • Residual moisture
  • Core breakdown
  • Gassing tendency
  • Degree of oolithization
  • Analysis of slurry content
  • Chemical analysis (bentonite content, carbon content, pH value)
  • Mechanical properties via electronic testing machine: compressive strength
  • Shear strength
  • Cleavage strength
  • Bending strength
  • Green sand tensile strength
  • Wet tensile strength


  • Lab-size Eirich-rotary, pan grinder and impeller mixing systems
  • Universal electronic testing unit Z005
  • Ramming device
  • Gassing analyzer
  • GF mechanical strength testing apparatus
  • Compatibility tester
  • Gas transmissibility tester
  • Screening tester
  • Moisture analyzer
  • Drying cabinet
  • Annealing furnace for sintering analysis up to 1600°C
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