FOUNDRY COATINGS

Refractory coatings are applied to sand moulds and cores in foundries (steel castings, grey cast iron and ductile iron, and non-ferrous metals).

By creating a high temperature barrier over the entire coated surface between casting and substrate (mould or core), these coatings reduce the thermal shock caused by sand substrate.

Coatings ensure a smooth mould surface, improve its strength, reduce reactions between the substrate and melt, and provide smooth surface of castings. Applying refractory coating also prevents ceirtain faults, i.e. segregations, burnt-in sand, bulges/recesses and others.

Different applying processes can be used for our coatings – dipping, spraying, pouring and applying with brush – providing flexible use in production processes specific to individual foundries

Efficient coating must provide the following features:

  • Sufficient refractory quality to prevent melt being pured into substrate
  • Good adhesiveness to substrate and good covering characteristics
  • No blistering, cracking and scaling tendency on drying
  • Good suspension and mixing properties
  • Good storage stability
  • Good adhesiveness