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Mould and demoulding device for wastewater treatment tanks


The general purpose of this extremely complex mould system is to cast a concrete tank type “6PE BAF” which stands for a 6 person house wastewater treatment system

The base as well as the 5 internal chambers are poured in one single phase. The tanks are cast upside down and after demoulding of the inside mould, they are turned 180° with a made to measure turning device.

Demoulding the inside is done in a specific sequence and by means of different techniques:

  • Hydraulic shrinking of chamber n°1
  • Air vents in chambers n°2, n°3 and n°4
  • Chamber n°5 is tapered
  • Securing of all the chambers
  • Hydraulic lifting of the base frame
  • Turning the element together with the outer mould
  • Releasing of the outside mould
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