Insufficient conditioning of a bentonite-bonded mold matgerial for the green sand molding process.

Essentail defects leading to sub-conditioning

  • too low water content
  • too low active bentonite,
  • too much decomposition product in the sand (too low degree of refreshment and/or too low new sand and/or used core sand addition) or
  • incorrect sequence of addition of components to the mixer and/or
  • too short mixing times.


Additional references:
Sand conditioning